JPH0220367B2 - - Google Patents

Description

[Detailed Description of the Invention] "Field of Industrial Application" The present invention is applicable to a machining center or the like in which a pallet with a jig attached is placed on a support stand, and a workpiece is fixed to the jig for machining. Regarding machine tools.

"Conventional technology and its problems" Normally, in a machining center, a workpiece is attached to a pallet via a jig at an external setup station, etc., and the workpiece is taken onto a rotary table (support stand) through an automatic pallet exchange device. Machining is done using the main spindle tool. However, in recent years,
When machining a wide variety of workpieces in small quantities, robots are often used to directly supply the workpieces to a machining center or to transport the workpieces out of the machining center. In such a case,
It is necessary to operate the jig on the pallet on the rotary table to fix and release the workpiece to the jig, but to do this, manually connect the jig's hydraulic and pneumatic hoses. There are two ways to do this: connect it to a device suspended from the ceiling, or use a jig equipped with an accumulator, such as a so-called power separate jig, by setting it up at an external station. However, in the former case,
Not only can it be unmanned, but there are problems with turning the rotary table, and in the latter case, the power separade jig itself is expensive, and it is necessary to increase the operating rate of the machining center and improve machining efficiency. A drawback is that at least two jigs are required even for the same type of workpiece.

The present invention was made in view of the above circumstances, and
A machine that can automatically operate jigs on a pallet on a support stand, making it easy to operate unmanned, allowing the support stand to rotate freely, and reducing the number of jigs. The purpose is to provide machinery.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a support base, a pallet positioning mechanism attached to the support base, and a pallet that allows the pallet to be seated on the support base. They are connected to each other to form a supply path for supplying pressure fluid to the jig to operate the jig, and the pressure fluid is sent from the support base to the jig via the pallet to operate the jig. It is something.

"Embodiment" Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 7 shows machining equipment constructed by combining a machining center MC, which is a machine tool according to the present invention, with a cylindrical coordinate robot RB and a two-sided automatic pallet changer APC.

The robot RB has a first workpiece (hereinafter referred to as the first workpiece) _W1 placed on the storage table S and a second workpiece different from the first workpiece _W1 (hereinafter referred to as the second workpiece).
This machine automatically attaches and detaches a workpiece W such as _W2 (referred to as a workpiece) to and from the machining center MC.
The hand _H1 for the workpiece _W1 and the hand _H2 for the second workpiece _W2 are automatically exchanged.
The automatic pallet changing device APC also replaces a pallet PT with a first jig JA (described later) for the first workpiece _W1 and a second pallet exchanger (described later) for the second workpiece _W2 .
It accommodates pallets PT with jig JB attached, and transfers any of the pallets PT to machining center MC as necessary.

The above-mentioned machining center MC is a horizontal type, and the first workpiece W ₁ , second workpiece W _{2 ,} etc., which are attached to the jigs JA and JB on the pallet PT and transferred onto the rotary table (support stand) 1, are mounted on the jigs JA and JB on the pallet PT. Workpiece W
is processed by a tool attached to the main spindle 2. First, the detailed structure of the rotary table 1 will be explained based on FIGS. 1 to 6. Reference numeral 3 in the figures is a base. At the center of the upper part of the base 3, there is formed a large diameter hole 3a that penetrates vertically, and at the center of the lower part, a hole 4a that penetrates vertically and has a smaller diameter than the hole 3a is formed coaxially with each other. , one end side of these holes 3a, 4a has a small diameter portion 5a.
A mounting part 5b is formed on the other end side, and a central shaft 5 with a large diameter part 5c between the small diameter part 5a and the mounting part 5b extends substantially the entire small diameter part 5a from the base 3. It is inserted through with its axis directed in the vertical direction while protruding upward. And this central axis 5
is fixed to the base 3 by fixing its mounting portion 5b to the lower surface of the base 3 with bolts 6. Also, inside this central shaft 5, an upper end 7 is provided.
a is an annular groove 8 formed in the upper part of the large diameter portion 5c.
a first oil passage 7 whose lower end 7b opens outward from the lower side of the mounting portion 5b; an upper end 9a which opens into an annular groove 10 formed in a lower portion of the large diameter portion 5c;
A second oil passage 9 whose lower end 9b opens outward from the lower side of the attachment part 5b, and a third oil passage whose upper end 11a opens to the upper end of the small diameter part 5a and whose lower end 11b opens to the lower side of the attachment part 5b. An oil passage 11 and a fourth oil passage 12 having an upper end 12a opening into an annular groove 13 formed above the small diameter portion 5a and a lower end 12b opening onto the lower side of the mounting portion 5b are formed, and further, upper end 14
a is an annular groove 1 formed at the lower end portion of the large diameter portion 5c;
5, the lower end 14b opens to the lower side of the attachment part 5b, the upper end 16a opens to an annular groove 17 formed in the middle part of the small diameter part 5a, and the lower end 16b opens to the attachment part 5b. A second air passage 16 that opens at the lower side of 5b is formed.

Further, a first cylinder 18 is fitted into the hole 3a of the base 3 via a bearing 19 so as to be rotatable in a horizontal plane. This first cylinder 18
A disk-shaped member 21 has an insertion hole 21a having the same diameter as the inner diameter of the small-diameter portion 20b at the upper end of the cylindrical member 20, which has a small-diameter portion 20b formed below the large-diameter portion 20a.
is fixed by bolts 22, and a worm wheel 23 is fixedly attached to the outer peripheral surface of the lower edge by bolts 24, and this worm wheel 23 is rotated by a drive device (not shown). The worms 25 are engaged with each other. A first piston 26, which has small diameter parts 26a, 26b on the upper and lower sides and a large diameter part 26c in the middle part, is attached to the large diameter part 5c of the central shaft 5. The insertion hole 21a of the disc-shaped member 21 of the cylinder 18 and the cylindrical member 2
0 into the hole of the small diameter part 20b, and the large diameter part 26c is fitted into the inside of the cylinder of the cylindrical member 20 to form the upper cylinder chamber 18a and the lower cylinder chamber 1.
It is provided in a state divided into 8b, and this first
The piston 26 has an inner circumferential side facing the large diameter portion 5c of the central shaft 5 and an outer circumferential side facing the first cylinder 18.
It has a structure that allows it to slide up and down in a fluid-tight manner. Further, inside the first piston 26, an upper end 27a opens into a hole 28 formed in the upper end surface of the first piston 26, and a lower end 27b
A first communicating air passage 27 opens to an annular groove 29 formed on the lower inner circumferential surface of the first piston 26 to communicate with the annular groove 15, and the annular groove is formed on the upper inner circumferential surface of the first piston 26. A first communicating oil passage 31 whose one end opens to an annular groove 30 formed to communicate with the first cylinder 8 and whose other end opens to the cylinder upper chamber 18a of the first cylinder 18, and the middle inner circumferential surface of the first piston 26. A second communication oil passage 33 is formed, one end of which opens in an annular groove 32 formed to communicate with the annular groove 10, and the other end of which opens into the cylinder lower chamber 18b of the first cylinder 18.

Furthermore, a disk-shaped clamp plate 34 having a locking hole 34a at a predetermined position is loosely fitted into the lower end portion of the small diameter portion 5a of the central shaft 5 so as to be freely movable up and down. This clamp plate 34
It is fixed to the upper end of the piston 26 via a bolt 35, and a locking pin 37, which is fixed to the first cylinder 18 by a bolt 36, is fitted into the locking hole 34a of the piston 26, thereby connecting the first cylinder 18 and the locking pin 37. relative rotation is prevented. Inside this clamp plate 34, the upper end opens into a hole 38 formed in the upper end surface, and the lower end opens into the hole 38 formed in the upper end surface.
A first communicating air passage 39 is formed that communicates with the hole 28 in the upper end surface of the piston 26.

Further, in the small diameter portion 5a of the central shaft 5 above the mounting portion of the clamp plate 34, a second piston 4 is provided with a large diameter portion 40a on the upper end side.
0 are slidably fitted in a liquid-tight manner on the top and bottom,
Inside the second piston 40, one end opens into an annular groove 41 formed on the upper inner circumferential surface of the second piston 40 so as to communicate with the annular groove 13, and the other end opens below the large diameter portion 40a. One end opens into a fourth communication oil passage 42 which opens outward at the part, an annular groove 43 formed on the lower inner circumferential surface of the second piston 40 to communicate with the annular groove 17, and the other end opens into the fourth 2 piston 40
A second communicating air passage 44 that opens outward is formed at the lower stage of the air passage.

Furthermore, the disc-shaped rotary table 1 having a predetermined thickness is fixed to a lower portion of the second piston 40. This rotary table 1 is fixed to the clamp plate 34 via bolts 45, and has a portion near the outer periphery of the lower surface thereof.
An annular coupling ring 48 is fixed via bolts 49 to an annular coupling ring 47 which is fixed to the base 3 via bolts 46 . Further, a circular recess 52 opening upward is formed in the center of the rotary table 1, and a second cylinder 53 is fitted into the recess 52 so as to be slidable up and down in an airtight manner. This second cylinder 53 is
A bottomed cylindrical cylinder adapter 55 is fitted into the recess 52 with a space 54 formed between the recess 52 and the recess 52 .
Attach the bolt 5 to the upper end of this cylinder adapter 55.
The large diameter portion 40a of the second piston 40 is fitted into the inside of the second cylinder 53 in a liquid-tight manner, and the inside is connected to the upper chamber of the cylinder. It is divided into a cylinder lower chamber 58a and a cylinder lower chamber 58b. and,
Upper end 1 of the third oil passage 11 formed in the central shaft 5
1a communicates with this upper cylinder chamber 58a, and a fourth communication oil passage 42 formed in the second piston 40 communicates with the lower cylinder chamber 58b.

Furthermore, the pallet clamp plate 5
7 is a rectangular plate long in the x-axis direction (horizontal direction in Fig. 7), and on the outer surface of both sides along the x-axis direction, there are a plurality of plates for supporting the pallet PT for conveying the pallet during pallet exchange. The support roller 59 of
Further, on the lower surfaces of the both sides, a plurality of guide rollers 60 are provided at predetermined pitches in the x-axis direction, respectively, for rollingly abutting against the lower inner surface of the pallet PT and guiding the pallet PT. By moving the pallet clamp plate 57 up and down, the pallet PT is fixed to and released from the rotary table 1.

Further, on the upper surface of the rotary table 1, a plurality of embedded members 6 are embedded and attached via bolts 61 at predetermined positions on the lower edge of the pallet PT.
2 are brought into contact with a plurality of locate pads 63
is fixedly attached to a predetermined position via a bolt 64, and a locating pin 65 and a positioning pin 66 each having a circular cross section are fixed to a predetermined position via a bolt 64.
7 and 68 to be fixedly attached. Then, the locating pin 65 and the positioning pin 66
are the two positioning holes 69 on the pallet PT,
It is directly fitted into the pallet 70 to lock and position the pallet PT. Furthermore, inside the rotary table 1, there is a locate pin 6 at the upper end.
A first communication air passage 73 opens into a hollow part 72 provided at the lower part of the rotary table 1, and a lower end opens into the hole 38 on the upper surface of the clamp plate 34; A second communication air passage 74 in the form of a hole is formed that opens into the space 54 between the second cylinder 53 and the rotary table 1 , and the locate pin 65 has upper and lower ends on the upper and lower end surfaces of the locate pin 65 , respectively. A first communication air passage 7 that is open and communicates with the hollow portion 72
5 is formed, and each of the above-mentioned locate pads 63
, a second communicating air passage 7 having one end opened at the upper end face of each locate pad 63 and the other end opened at the side face.
6 are formed respectively. The other end of these second communication air passages 76 and the second communication air passage 74 in the rotary table 1 are communicated with each other by a connecting pipe 77.

On the other hand, inside the pallet PT, one of the embedded members 62 is formed with a through hole 78 that vertically passes through the embedded member 62, and in the main body thereof, the lower end communicates with the through hole 78. A second communicating air passage 79 whose upper end opens to the upper surface, and a first communicating air passage 80 whose lower end opens to the positioning hole 69 and whose upper end opens to the upper surface are formed.

The first air passage 14, the annular grooves 15, 2
9, first air communication passage 27, 39, 73, hollow part 7
2. The first air communication path 75 is connected to the machining center MC
In the main body, the positioning hole 69 and the first
In the pallet PT, the communicating air passages 80 supply pressure fluid sent from a jig operating circuit 82 in a pneumatic control panel 81 (described later) to each jig JA, JB.
The second air passage 16 and the annular grooves 17 and 4 constitute the first supply passages 83 and 84 for supplying air to the
3. Space 54, second communication air path 74, connecting pipe 7
7. The second communication air passage 76 is connected to the machining center MC
In the main body, the through hole 78 and the second communication air passage 79 are in the pallet PT, respectively.
The pressure fluid sent from the pallet seating confirmation circuit 85 in the pneumatic control panel 81 is connected to each jig JA, JB.
2nd supply paths 86 and 87 are configured for supplying. Furthermore, the locate pin 65, locate pad 63, etc. are connected to the pallet PT positioning mechanism 8.
8.

In addition, 89 in the figure is a sealing material such as an O-ring, and 90
91 is an x-axis ball screw,
92 is a connecting seat for fixing each jig JA, JB to the pallet PT.

Next, Fig. 8 shows the first jig JA for the first workpiece _W1 mounted on the pallet PT, the hydraulic/pneumatic circuit that operates it, and the detection mechanism that detects its operating state. This will be explained with reference to FIGS.

In the figure, 100 is a lower member placed and fixed on the pallet PT, and this lower member 10
0, an upper member 101 has a plurality of connecting bolts 1
They are connected via 02. The lower member 10
A speed controller is connected to the first communicating air passage 80 of the pallet PT through a first communicating air passage 103 formed inside the lower member 100, a connecting pipe 104, and an air filter 105 in the upper part of the pallet PT. 106, an air motor 108 connected to this speed controller 106 through a connecting pipe 107, and an output shaft 1 of this air motor 108.
09 is provided with a hydraulic pump 112 connected to an input shaft 110 via a coupling 111, and a 4-port 2-position switching mechanical valve 114 with a P port connected to a discharge pipe 113 of the hydraulic pump 112. And the hydraulic pump 112
The suction pipe 115 is connected to a strainer 117 in an oil tank 116 provided in the center of the lower member 100.
The T port of the mechanical valve 114 is connected to the oil tank 116 via a connecting pipe 118.

Further, in the upper part of the lower member 100 and near the mechanical valve 114, a second communicating air passage of the pallet PT is connected via a second communicating air passage 119 formed inside the lower member 100 and a connecting pipe 120 in sequence. An air cylinder 121 connected to 79 is disposed, and when the rod 121a of this air cylinder 121 is retracted, the mechanical valve 114 has its P port connected to its A port and its B port connected to its T port. When the rod 121a is extended, its tip touches the roller 114 of the mechanical valve 114.
a is pushed in, which causes the mechanical valve 11
4 is switched, its P port becomes B port, and A
The ports are configured to be in communication with the T ports, respectively.

On the other hand, in the upper part of the upper member 101, there is a first relief whose discharge side is connected to the A port of the mechanical valve 114 through a connecting pipe 122, and whose return side is connected to the oil tank 116 through a connecting pipe 123, etc. The discharge side of the valve 124 is connected to the B port of the mechanical valve 114 through a connecting pipe 125, and the return side is connected to the oil tank 116 through the connecting pipe 125.
The second relief valve 12 communicated by 6 etc.
7 are arranged. Furthermore, two positioning pins 128 and two guide pins 128a are provided at predetermined positions on the upper part of the upper member 101, and the two positioning pins 128 fit into the holes in the corners of the first workpiece _W1 to position the first workpiece _W1 . In the vicinity of these positioning pins 128 and guide pins _128a , four sets of clamp mechanisms 129, .

Each of the above-mentioned clamp mechanisms 129 has the same basic structure. Each of the clamp mechanisms 129 has a cylinder body 130a provided with its axis directed in the vertical direction, and a piston 130c having a rod 130b with the rod 130b directed upward. Each hydraulic cylinder 130 is slidably fitted in a liquid-tight manner;
A pair of link members 132 whose lower ends are rotatably attached to each connecting member 131 attached to the tip of the rod 130b of each hydraulic cylinder 130.
, each clamp bolt 133 is screwed onto the tip,
In addition, each support pin 135 has a base end attached to each mounting seat 134.
The clamp arm 136 is pivotally supported by the clamp arm 136 so as to be able to swing up and down, and has an intermediate portion connected to the upper end of each pair of link members 132 by a pin. Each of the inlet and outlet ports of each of the hydraulic cylinders 130 is connected to a pair of connecting pipes 137.
The connecting pipes 122 and 125 connected to the mechanical valve 114 are connected to the connecting pipes 122 and 125, respectively. The vertical movement of each rod 130b of each hydraulic cylinder 130 is transmitted to each clamp arm 136 via each link member 132, whereby each clamp arm 136 is connected to each support pin 136.
The first workpiece W1 is swung up and down using the fulcrum as a fulcrum, and each clamp bolt 133 at its tip is used to lock and fix the first workpiece _W1 or to release the fixation.

Further, air injection ports 139 connected to the discharge pipe 138 of the air motor 108 are arranged near each of the positioning pins 128 and the guide pins 128a.

Thus, the first jig JA becomes operable when it is attached to the pallet PT and the pallet PT is seated on the rotary table 1 of the machining center MC. 1st
The hydraulic pneumatic circuit will be explained based on FIG. 6. In the figure, 81 is a pneumatic control panel. Inside this air pressure control panel 81, an external air source 1 is provided.
40, and filters 14 in order from the upstream side.
1. A jig operating circuit 82 comprising a regulator 142, an oiler 143, a normally closed 3-port 2-position electromagnetic switching valve 144, and a speed controller 145 arranged in series is connected to the air source 140;
Filter 146 and regulator 14 from the upstream side
7. A pallet seating confirmation circuit comprising an oiler 148, a normally closed 3-port 2-position electromagnetic switching valve 149, and a speed controller 150 arranged in series, and a pressure switch 151 provided downstream of the speed controller 150. 85 are provided. The terminal end of the jig operating circuit 82 is connected to the first air passage 14 of the first supply passage 83 of the machining center MC through a connecting pipe 152, and the terminal end of the pallet seating confirmation circuit 85 is connected to the connecting pipe 153. Therefore, it is connected to the second supply path 86, and the electromagnetic switching valve 1 of the jig operating circuit 82 is connected to the second supply path 86.
44 to the open state, the air motor 108 is operated, and the air motor 108 drives the hydraulic pump 112 to operate each clamp mechanism 129, while the electromagnetic switching valve 149 of the pallet seating confirmation circuit 85 is operated. By switching to the open state, the air cylinders 121 can be operated to switch between fixing and releasing the fixing of the first workpiece _W1 by each clamp mechanism 129. Further, when replacing a pallet, it is also possible to check whether the pallet PT is seated on the rotary table 1 by turning on the electromagnetic switching valve 149. In addition, 154 in the figure is a muffler.

In addition, the above machining center MC and the first jig
JA is provided with a detection mechanism that detects the operating state of the first jig JA. That is, the first jig
The support pin 135 of one set of clamp mechanisms 129 among the four sets of clamp mechanisms 129 of JA is extended in the axial direction, and first and second cam members 155, 156 are attached to the extended ends. are fixedly attached to the support pin 135 at positions shifted by 90 degrees from each other in the circumferential direction. First and second limit switches 157, 158 are installed in the vicinity of these cam members 155, 156, and are attached to a mounting seat 159, and the clamp mechanisms 129...
When the first work W ₁ is fixed, the roller 157a of the first limit switch 157 hits the first cam member 155, and fixation of the first work W ₁ is detected, while the fixation of the first work W ₁ is released. When the support pin 135 rotates, the roller 158a of the second limit switch 158 moves against the second cam member 15.
6, the release of fixation of the first workpiece _W1 is detected.

Further, at predetermined positions of the first jig JA, transmitting heads 160a and 161a of first and second non-contact signal transmitters 160 and 161 are electrically connected to the first and second limit switches 157 and 158, respectively.
are arranged side by side. On the other hand, the receiving heads 160b and 16 of the first and second non-contact signal transmitters 160 and 161 are located near the jig at the workpiece exchange point.
A jig operation state confirmation loader 162 equipped with a jig 1b is provided. This confirmation loader 162 has a pivot 1 rotatably attached to a fixed seat 163 via a bearing 164 with the axis oriented in the vertical direction.
65, a connecting plate 166 fixedly attached to the upper end of this pivot 165, a connecting member 168 connected to this connecting plate 166 through the elongated hole 166a and the bolt 167, and a connecting member 168 on the upper surface of the connecting plate 166. Proximally fixedly mounted horizontal pivot arm 169
and an air cylinder 170 whose cylinder body 170b is fixed to the fixed seat 163 with the tip of the rod 170a connected to the connecting member 168, and each of the receiving heads 160b, 161b is attached to the tip of the rotating arm 169. are installed side by side. When the rod 170a of the air cylinder 170 is extended, the swing arm 16
9 is in a state separated from the first jig JA on the pallet PT, and when the rod 170a is retracted, the tip of the swing arm 169 approaches the first jig JA, and the first and second non-contact signal transmission is performed. vessel 160,1
The transmitting heads 160a, 161a and the receiving heads 160b, 161b of 61 are arranged to be close to each other, and in this close state, the signals from the first and second limit switches 157, 158 are transmitted from the transmitting heads 160a, 161a to the receiving heads. 160b,1
61b.

Next, the second jig JB for the second workpiece _W2 is mounted on the pallet PT.
And about the pneumatic circuit that operates this, the second
This will be explained based on FIGS. 0 to 32.

In the figure, reference numeral 200 denotes a base that is placed and fixed on the pallet PT, and a vertical plate 201 is fixed and reinforced by a reinforcing plate 202 on top of this base 200. And, on the vertical plate 201,
A pair of left and right lower cylinders 203 and 204 that support the second work W ₂ from below at a predetermined position on the front surface (the left surface in FIG. 20) and the side edge of the second work W ₂ are guided from one side. A side cylinder 205 is provided, and these lower cylinders 203, 204, and side cylinder 205
Three sets of clamp mechanisms 206 are provided at predetermined positions to releasably fix the lower both sides and the upper part of the second workpiece W ₂ supported in a predetermined attitude by the clamp mechanism 206 .

Each of the above-mentioned clamp mechanisms 206 has the same basic structure, and each mounting bracket is attached to the back surface of the vertical plate 201 with the axis of each cylinder body 207a directed in the horizontal direction orthogonal to the vertical plate 201. 208 and each rod 207b is fixed through each through hole 2 bored in the vertical plate 201.
Each air cylinder 207 extends and contracts in the direction from 09 to the front side of the vertical plate 201, and each air cylinder 207 has one end rotatably attached to each connecting member 210 attached to the tip of the rod 207b of each air cylinder 207. A link member 211 and each mounting seat 21 having each clamp bolt 212 screwed onto the tip and having an intermediate portion provided on the surface of the vertical plate 201.
3 through each support pin 214 so as to be rotatable, and each of the link members 21
Each clamp arm 215 has a proximal end connected to the other end of the clamp arm 215 by a pin.

Further, a pair of locators 216, 216 are disposed above the front surface of the vertical plate 201 at left and right positions above the vertical plate 201 to hold and position the second workpiece _W2 from above and from the sides. ing. Each locator 216 has a thin air cylinder 217 fixedly attached to the front surface of the vertical plate 201,
Each rotating shaft 21 is rotatably attached to the vertical plate 201 while penetrating the vertical plate 201 in the thickness direction.
8, an intermediate portion is fixed to each rotating shaft 218, one end is rotatably connected to the tip of each rod 217a of each air cylinder 217, and each positioning roller 219 is provided at the other end. and substantially L-shaped rotating members 220.

Furthermore, a dog 221 is attached to the connecting member 210 of the upper one of the three sets of clamp mechanisms 206.
is positioned and attached to the back side of the vertical plate 201, while the clamp mechanism 206 operates and the clamp arm 215 is attached to the reinforcing plate 202.
When the case W ₂ is fixed, the roller 222
A hits the first dog 221, and a limit switch 222 is provided to detect the fixation of the first dog 221.
Moreover, each attachment member 223 is attached to each rotary shaft 218 of each rotor 216 at the end protruding toward the back side of the vertical plate 201.
Each bolt 224 is screwed into. and,
Each bolt 22 is installed on the back side of the vertical plate 201.
Each mechanical valve 225 of a two-position switching type switched by a switch 4 is fixedly attached.

Further, on the upper part of the base 200, a filter is connected to the first communication air passage 80 of the pallet PT via a first communication air passage 226 formed inside the base 200 and a connecting pipe 227. 228a and this regulator 2
2-position switching type first and second air operated valves 23 with first ports 231a and 232a connected to the discharge side of 28 via connecting pipes 229 and 230.
1,232 and this second air operated valve 2
A speed controller 234 connected to the second port 232b of No. 32 via a connecting pipe 233 is disposed. The second port 231b of the first air operated valve 231 is connected to the connecting pipe 23.
5. Each of the above air cylinders 2 via the branch pipe 236
07, and the third port 231c of the first air operated valve 231 is connected to the other port of each air cylinder 207 via a connecting pipe 237 and a branch pipe 238. The first pilot port 231d of the first air operated valve 231 is connected to the connecting pipe 23.
9. To the second communication air passage 79 of the pallet PT via the second communication air passage 240 in the base 200,
The second pilot port 231e is connected to the connecting pipe 2.
41 to the one mechanical valve 225
It is connected to the. On the other hand, the third port 232c of the second air operated valve 232 is connected to the connecting pipe 2.
42 to each air cylinder 217 of each locator 216, and its pilot port 232d is connected to the second communication air passage 240 via a connecting pipe 243. Further, the mechanical valves 225 are connected to each other by a connecting pipe 244, and the other mechanical valve 225 is connected to the connecting pipe 230 on the inlet side of the second air operated valve 232 by the connecting pipe 245. ing. Furthermore, a junction 246 is provided at the center of the front surface of the vertical plate 201 on the discharge side of the speed controller 234.
This junction 246 is connected to the lower cylinder 203,
A plurality of connecting pipes 248, .

Therefore, the second jig JB is different from the first jig JB.
As in the case of JA, the jig operation circuit 82 of the pneumatic control panel 81 and the pallet seating confirmation circuit 85 are used to operate the jig.

Reference numeral 249 in the figure is a locking mechanism that locks the second workpiece W ₂ from above, and a rod 251 with a roller 250 attached to the lower end is attached to the cylindrical fixing member 25.
2 via a spring 253 so as to be freely vertically fitted.

Next, the operation of the machining equipment having the above configuration will be explained.

First, the operation of the entire machining equipment will be explained.
First, each pallet PT with the first jig JA and second jig JB attached is transferred to the automatic pallet changer APC.
When processing the first workpiece W1 by transferring it to the automatic pallet changing device APC and processing the first workpiece _W1 , the first jig JA
The pallet PT with attached 2nd workpiece W ₂
When machining, the pallet PT with the second jig JB attached is taken onto the rotary table 1 of the machining center MC, and positioned and fixed. Next, the robot RB is operated to move the first workpiece W ₁ or the second workpiece W ₂ placed on the storage stand S to the first jig JA or the second jig on the rotary table 1.
Attach to JB, position and fix. Then, the workpiece W is machined using the tool on the main spindle 2, and when the machining is completed, the fixation is released, the robot RB is operated again, and the machined workpiece W is transferred onto the storage stand S. Next, if the same type of workpiece W is to be machined continuously, the next workpiece W is transferred from the storage table S to the pallet PT of the rotary table 1 by the robot RB and the above procedure is repeated. When processing the type of workpiece W, the robot RB's hands H ₁ and H ₂ are automatically replaced with the required ones, and the automatic pallet changer APC is activated to match the workpiece W on the rotary table 1. Take in the ivy jig J and repeat the above steps.

In this way, in the above machining equipment, the machining center MC is equipped with an automatic pallet changer APC and a robot RB, and the automatic pallet changer APC quickly changes the jig J on the machining center MC to the jig J that matches the workpiece W to be machined. If the robot RB is used to quickly attach and detach the workpiece W to the jig J on the machining center MC, the machining time will be short, the amount of machining will be relatively small, and a large variety of products will be produced. It is ideal for unmanned processing such as office automation equipment.

Next, the operation of the rotor table 1 portion of the machining center MC will be explained with reference to FIG.

First, the rotational positioning of the rotary table 1 is as follows.
This is performed by a worm 25 and coupling rings 47 and 48, which are rotated by a drive device (not shown). That is, in the state shown in FIG. 1, the coupling rings 47 and 48 are engaged with each other,
The rotary table 1 is positioned and fixed at a predetermined position. When rotating the rotary table 1 from this state and indexing it to another position, the second oil passage 9,
Pressure oil is supplied to the first cylinder 18 via the second communication oil passage 33.
into the cylinder lower chamber 18b, push up the first piston 26, push up the clamp plate 34 and rotary table 1, and push up the coupling rings 47, 4.
Remove the mesh of 8. In this state, the worm 25 is rotated to rotate the worm wheel 23.
The rotational force of the worm wheel 23 is generated from the worm wheel 23 to the first cylinder 18 to the locking pin 37.
It is transmitted to the rotary table 1 in this order: → clamp plate 34 → rotary table 1, and the rotary table 1 rotates. When the desired position is reached, the worm 25 is stopped and the rotation of the rotary table 1 is stopped. At the same time, the first oil passage 7 and the first
Pressure oil is sent into the cylinder upper chamber 18a of the first cylinder 18 through the communication oil passage 31, and the first piston 26
is pressed down, the clamp plate 34 and rotary table 1 are pressed down, and the coupling rings 47 and 48 are engaged with each other and positioned.

Further, when fixing or releasing the pallet PT on the rotary table 1, the pallet clamp plate 57 is operated. That is, in the state shown in FIG. 1, when pressure oil is sent from the third oil passage 11 into the cylinder upper chamber 58a of the second cylinder 53, the second cylinder 53 is pushed up and the pallet clamp plate 57 is pressed against the pallet PT.
Push upward to release the pallet PT. On the other hand, from this fixed release state, the fourth oil passage 1
2. When pressure oil is sent into the cylinder lower chamber 58b of the second cylinder 53 via the fourth communication oil passage 42, the second piston 40 is fixed to the rotary table 1, and the cylinder adapter 55 is pushed down to The cylinder 53 moves downward and the pallet clamp plate 57 is pushed downward. Then, the pallet PT is lowered by the lowering of the pallet clamp plate 57, and the embedded member 62 at the lower edge thereof comes into contact with the locate pad 63 on the rotary table 1 and is seated on the rotary table 1. At this time, the locate pin 65 and positioning pin 66 on the rotary table 1 fit into the positioning holes 69 and 70 of the pallet PT, and the pallet PT is positioned on the horizontal plane.

Also, when the pallet PT is seated on the rotary table 1 as described above, the pallet
The seating surface of the PT is cleaned in advance with compressed air.
In addition, seating of the pallet PT is confirmed by a pallet seating confirmation circuit 85. That is, the palette
When the PT is seated, the electromagnetic switching valve 149 of the pallet seating confirmation circuit 85 is energized and switched to the open state.
Then, the compressed air sent from the air source 140 via the filter 146, regulator 147, and oiler 148 passes through the speed controller 150, and is routed from the connecting pipe 153 to the second air path 16 of the central shaft 5.
The second air passage 16 → the second communication air passage 44 →
The air is fed into the second communicating air path 76 of each locate pad 63 in the order of space 54 → second communicating air passage 74 → connecting pipe 77 → second communicating air passage 76, and is ejected from the top surface of each locate pad 63, removing dust from the pallet seating surface. etc. to be removed. Furthermore, when the pallet PT is seated, the second communicating air passages 76 of the other locate pads 63 except for one locate pad 63 are blocked by this pallet PT itself, while the second communicating air passages 76 of the one locate pad 63 are blocked by the pallet PT itself. The entered compressed air passes through the second communication air passage 79 from the through hole 78 of the embedded member 62 of the pallet PT and enters the jig J, but since the air passage inside the jig J is closed, the pressure switch 151 The pressure increases and the pressure switch 151 is activated. and,
This pressure switch 151 confirms that the pallet PT is seated.

Next, when the robot RB attaches and detaches the workpiece W to and from the jig J of the pallet PT on the rotary table, the jig J is operated to fix the workpiece W and release the fixation. , the operation of the jig J at that time will be explained.

First, when fixing the first workpiece _W1 to the first jig JA, in FIG. 16, the electromagnetic switching valve 144 of the jig operating circuit 82 is energized and opened. Then, the air source 140 passes through the filter 141, the regulator 142, and the oiler 143 to the electromagnetic switching valve 14.
4, the compressed air is sent to the central shaft 5 from the connecting pipe 152 via the speed controller 145.
enters the first air path 14, and goes from the first air path 14 to the first
Communication air passage 27, 39, 73 → hollow part 72 → first
Communication air passage 75 → positioning hole 69 of pallet PT
→First communication air passage 80→First communication air passage 103 of the first jig JA enters the first jig JA in this order, and
From the first communication air passage 103 to a connecting pipe 104, an air filter 105, a speed controller 106,
The air passes sequentially through the connecting pipe 107 and enters the air motor 108 to drive the air motor 108. The exhaust gas discharged from the air motor 108 is discharged from a discharge pipe 138.
The air is then blown out from the air injection ports 139, . . . to remove chips, dust, etc. from the seating surface of the workpiece. In addition, the air motor 108 operates the hydraulic pump 112 to supply pressure oil to each hydraulic cylinder 130 of each clamp mechanism 129 in the order of hydraulic pump 112 → discharge pipe 113 → mechanical valve 114 → connection pipes 122, 137 → each hydraulic cylinder 130. send. As a result, each piston 130c of each hydraulic cylinder 130 is lowered, and each rod 130b pulls down each clamp arm 136 and rotates downward about each support pin 135, and each clamp bolt 133 at the tip of the rod 130b is rotated downwardly. 1. Fix workpiece _W1 . The pressure oil discharged from each hydraulic cylinder 130 is transferred to the connecting pipe 13
7,125 → Mechanical valve 114 → Connection pipe 1
Return to the oil tank 116 in the order of 18→oil tank 116.

On the other hand, the first jig fixed to the first jig JA as described above
When releasing the workpiece _W1 , the electromagnetic switching valve 149 of the pallet seating confirmation circuit 85 is switched to the open state from the above state. Then, the compressed air from the air source 140 is transferred from the second communication air passage 76 of the locate pad 63 to the first jig via the through hole 78 of the pallet PT and the second communication air passage 79 in the same way as in the above case.
Enters the second communication air passage 119 of JA, and connects the connecting pipe 12
It enters the air cylinder 121 from 0. Then, by extending the rod 121a of this air cylinder 121, the mechanical valve 114 is connected so that its P port is connected to B.
The A port is switched to the state where it communicates with the T port, respectively. This mechanical valve 114
By switching, the pressure oil from the hydraulic pump 112 enters each hydraulic cylinder 130 through the connecting pipes 125, 137, raises each piston 130c, rotates each clamp arm 136 upward, and
Unfix workpiece _W1 .

Furthermore, the first workpiece W ₁ by the first jig JA
The jig operation confirmation loader 16 is used to fix and release the fixation.
2, and each operation of the machining center MC and robot RB is controlled by this detection signal. That is, first and second cam members 155 and 156 are attached to one support pin 135 of the clamp mechanism 129 of the first jig JA, and when the clamp mechanism 129 is fixed, the first cam member 155
is the roller 157a of the first limit switch 157.
At this time, the fixation of the first workpiece W ₁ is detected by the first limit switch 157, and the second cam member 15 is detected when the clamp mechanism 129 is released from the fixation.
6 is the roller 158 of the second limit switch 158
At time a, the second limit switch 158 detects that the first workpiece _W1 is released. The signal from the first limit switch 157 is sent to the transmission head 160a of the first non-contact signal transmitter 160.
Then, the signals of the second limit switch 158 are sent to the transmitting head 161a of the second non-contact signal transmitter 161, respectively. On the other hand, a jig operation state confirmation loader 162 is disposed near the rotary table 1, and when fixing or releasing the fixation of the first workpiece _W1 , the swing arm 169 is moved by contracting the rod 170a of the air cylinder 170. The first and second non-contact signal transmitters 1 are rotated and located at the tips thereof.
The receiving heads 160b, 161b of 60, 161 are placed in close proximity to the transmitting heads 160a, 161a. The detection signal related to the fixing and unfixing of the first workpiece _W1 is sent to the transmitting head 160a,
The signal is transmitted from 161a to receiving heads 160b and 161b, and then sent to an external control device (not shown).

As described above, the first jig JA is operated by the jig operating circuit 82 and the pallet seating confirmation circuit 85, and the first workpiece _W1 is fixed and unfixed while removing chips from the seating surface. , these operations proceed in conjunction with the operations of the machining center MC main body, robot RB, and automatic pallet exchange device APC. To explain this linked state based on FIG. 33, first, both the electromagnetic switching valves 144 and 149 of the jig operating circuit 82 and the pallet seating confirmation circuit 85 are energized, and each clamp arm 136 of the clamp mechanism 129 is pushed. Raised, first workpiece W ₁
is unfixed. At this time, the air motor 108
is activated, exhaust air is blown from the air injection port 139 onto the workpiece seating surface, and chips are removed. When the first workpiece W ₁ is unfixed, this unfixing is detected by the jig operating state confirmation loader 162, and a signal from the confirmation loader 162 causes the robot RB to be operated via the CNC device of the robot, and the first workpiece W1 is unfixed. The first workpiece W ₁ of 1 jig JA is transferred onto the storage table S, and a new first workpiece W ₁ is transferred onto the storage table S.
is transferred from the storage stand S onto the first jig JA. Then, at the end of the transfer, the pallet seating confirmation circuit 85
The electromagnetic switching valve 149 is turned OFF, and the transferred first workpiece _W1 is moved to the clamp mechanism 129,...
Fixed by This fixation of the first workpiece _W1 is detected by the confirmation loader 162, and the main body of the machining center MC is operated in response to this detection signal to proceed with machining. After the machining is completed, the electromagnetic switching valve 149 of the pallet seating confirmation circuit 85 is energized again and the clamp mechanisms 129, etc. are released, and the release signal causes the robot RB to operate and remove the processed first workpiece _W1. is transferred onto the storage stand S. In addition, the electromagnetic switching valve 144 of the jig operating circuit 82
is turned OFF, the blowing of exhaust gas from the air injection port 139 is stopped, and the electromagnetic switching valve 149 of the pallet seating confirmation circuit 85 is also turned OFF. Then, the automatic pallet exchange device APC is operated, and the pallet PT on the rotary table 1 to which the first jig JA is attached is exchanged with the pallet PT to which the second jig JB is attached.

Next, the operation of the equipment when machining the second workpiece _W2 using the second jig JB will be briefly explained using FIG. 34. First, the electromagnetic switching valve 149 of the pallet seating confirmation circuit 85 is energized. The compressed air enters the connecting pipe 239 through the speed controller 150 and the like, and then enters the first air operated valve 23.
1 to the state shown, and the connecting pipe 243
and then enters the second air operated valve 232.
The first port 232a and the second port 232b
Switch to a position that communicates with Next, the electromagnetic switching valve 144 of the jig operating circuit 82 is excited and opened, and the compressed air passes through the regulator 228, etc., enters the first air operated valve 231, and further passes through the connecting pipe 235 and each branch pipe 236 to each air cylinder. Enter 207. And each air cylinder 20
7 is retracted to release the fixation of the second workpiece W ₂ by each clamp mechanism 206. Further, the compressed air that has passed through the second air operated valve 232 passes through the speed controller 234 and is blown out from the injection port of the connecting pipe 248 to remove chips and the like from the workpiece seating surface.

Then, when each of the clamp mechanisms 206 is released, the rod 207 of the air cylinder 207
The second dowel 221b attached near the tip of b is the second
When the limit switch 222c is contacted and the release state is detected, this detection signal is received by the jig operating state confirmation loader 162 and sent to the CNC device, and the robot RB is operated. By this robot RB, the second workpiece W ₂ on the second jig JB is transferred onto the storage stand S, and a new second workpiece W ₂ on the storage stand S is transferred onto the second jig JB. be done. Next, the electromagnetic switching valve 149 of the pallet seating confirmation circuit 85 is turned off and the second
Pilot pressure to air operated valve 232 is released and second air operated valve 232 is switched by spring force to the position shown. Then, the compressed air from the second air operated valve 232 enters each air cylinder 217 of each locator 216 through the connecting pipe 242, and expands each air cylinder 217 against the spring force, causing the second air cylinder 217 of each locator 216 to move. At the same time as the workpiece W ₂ is positioned,
Air blowing from the connecting pipe 248 stops. Further, when each locator 216 is in the positioning state, the bolt 224 provided on the rotating shaft 218 via the mounting member 223 switches each mechanical valve 225 against its spring force, and the compressed air flows into the connecting pipe 22.
5, 244, and 241 in order to enter the first air operated valve 231 and connect it to the first port 23.
1a is switched to a position where it communicates with the third port 231c. Then, the first air operated valve 231
The compressed air that exits the connecting pipe 237 and each branch pipe 238.
and then enters each air cylinder 207 through which each air cylinder 207 is extended and the second workpiece W ₂ is fixed by each clamp arm 215 . When the air cylinder 207 is extended, its first dog 221a hits the roller 222a of the first limit switch 222 and the fixed state is detected, and this detection signal is sent to the control device by the jig operation state confirmation loader 162 and is sent to the machining center. The main body of the MC is activated and machining of the second workpiece _W2 proceeds.

When the machining of the second workpiece W ₂ is completed, the electromagnetic switching valve 149 of the pallet seating confirmation circuit 85 is energized and opened, and the second air operated valve 23 is opened.
2 is switched to start blowing air from the connecting pipe 248, and each air cylinder 217 is contracted by the spring force, and each locator 216 is
is released. Then, by releasing each locator 216, each mechanical valve 225 is switched to the closed position, thereby switching the first air operated valve 231 to each air cylinder 207.
is contracted, each clamp mechanism 206 is released, and the second limit switch 222
The jig operation status can be confirmed by unfixing the loader 1 via c.
It is detected by 62 and robot RB is activated.
Transfer the processed second workpiece _W2 onto the storage stand S.
Then, each of the electromagnetic switching valves 144, 149
The rotary table 1 with the second jig JB is turned off and the automatic pallet changer APC is activated.
The upper pallet PT is a pallet with a different type of jig J.
Automatically exchanged for PT.

In the machining center MC, the rotary table 1, the central shaft 5, the locate pin 65, etc. are connected to a first supply path 83 consisting of the first communication air passages 73, 75, the first air passage 14, etc., and a second communication air supply path 83, Since a second supply path 86 consisting of a passage 74, a second air passage 16, etc. is formed, a pallet PT to which a jig J such as the first jig JA is attached is seated on the rotary table 1 for positioning or fixing. Just by
29, 206 etc. can be operated, and
Compressed air is supplied from the second supply path 86 to the pallet PT.
It is possible to supply the jig J through the second supply path 87 and to control switching of the operations of the clamp mechanisms 129, 206, etc. Therefore, the conventional troublesome work of connecting the hydraulic and pneumatic hose of the jig J on the pallet PT to something hanging from the ceiling on the rotary table 1 is no longer necessary, and the work can be automated. This is convenient for moving forward, and the rotary table 1 can also be freely rotated without being restricted. Furthermore, since the pallet seating confirmation circuit 85 is used to send compressed air to the second supply paths 86 and 87, fewer pneumatic devices are added and the structure is simplified.

Furthermore, since the jig J is operated by compressed air, high pressure can be easily generated, and when supplying compressed air, it is not necessary to pay as much attention to the seal as in the case of hydraulic pressure. Furthermore, compressed air can be blown out onto the workpiece seating surface of the jig J to remove chips, etc. Furthermore, since the air is blown out through the piping inside the jig J, it can be applied over the entire area of the seating surface. Chips can be removed reliably and easily.

Furthermore, in the conventional method using a power separade jig, the jig itself is expensive, and the power separade jig must be set up at an external setup station, so it is difficult to maintain a high equipment operating rate. Therefore, at least two sets of jigs were required for the same type of workpiece W, but in the machining center MC described above, the inexpensive jig J can be used, and the jig J can be used on the rotary table 1.
Since the jig J is connected to a driving source, it is only necessary to prepare one set of jigs J for the same type of workpiece W. Therefore, equipment costs can be reduced, and the jig J can be easily managed, which is extremely convenient when handling many types of workpieces W.

Furthermore, since the hydraulic pressure circuit of the conventional power separade jig is configured as a closed circuit,
In addition to being troublesome to prevent oil leaks, the cylinders could only be operated single-handedly, and there were restrictions on the operation of the equipment. However, in the first jig JA described above, the air motor 108 is first driven by compressed air;
8 to drive the hydraulic pump 112 to operate its clamp mechanism 129, thereby configuring the hydraulic circuit as an open circuit, so there is no need to pay much attention to leakage of pressure oil.
Further, by providing a P port and a T port, the hydraulic cylinder 130 can be operated in a double-acting manner via the mechanical valve 114, and a sequence valve or the like can be added to perform more complicated operation.

In addition, in the above mechanical valve MC,
A jig operating state confirmation loader 162 equipped with non-contact signal transmitters 160, 161 is attached near the rotary table 1, and the jig operating state confirmation loader 162 is equipped with non-contact signal transmitters 160, 161. Since the signal is transmitted to the confirmation loader 162, the operating condition of the jig J can be reliably confirmed, increasing reliability, and the signal is sent to the CNC device on the robot side to control the robot RB. The main body of the machining center MC, the automatic pallet exchange device APC, etc. can be operated in conjunction with the operation of the jig J.

By the way, in the machining center MC, a coolant nozzle is usually arranged near the main shaft 2. For this reason, there are parts of the workpiece W attached to the jig J that are difficult to be sprayed with coolant.
Therefore, the flow paths such as the first supply paths 83 and 84 of compressed air in the above embodiment are installed in a machining center.
Formed on the main body side of MC and pallet PT,
By providing flow channels inside the jig J and supplying coolant through these channels, coolant can be easily applied to areas that are difficult to apply coolant to, which is convenient. .

In addition, in the above embodiment, the main body of the jig J was fixed to the pallet PT, but the third
As shown in Fig. 5, the jig J consists of a base part 254 fixed to the pallet PT and a main body part 255 swingably attached to the base part 254 by a rack and pinion or a swing motor, The swing motor, etc. may be driven by the compressed air or pressure oil together with each clamp mechanism, etc., and when such a jig J is used, the workpiece W
5-sided machining becomes easy.

Furthermore, in the above, the workpiece W is stored on the storage stand S.
Although it is placed on the storage stand S, a carry-in/out conveyor or a bucket may be used instead of the storage stand S.

``Effects of the Invention'' As explained above, the machine tool of the present invention has a support base, a pallet positioning mechanism attached to the support base, and a pallet positioning mechanism that allows the pallets to mutually interact with each other while the pallet is seated on the support base. A communicating supply path for pressure fluid such as compressed air is provided, and the pressure fluid is sent to the jig on the pallet to operate the jig through this supply path, so the jig operation work on the support table is unattended. In addition, the support table can be freely rotated, and the number of jigs can be minimized, resulting in a significant reduction in equipment costs.

[Brief explanation of drawings]

1 to 6 show the main parts of a machining center which is an embodiment of the machine tool of the present invention, in which FIG. 1 is a sectional view of the rotary table portion, FIG. 2 is a half sectional view of the pallet portion, Figure 3 is a cross-sectional view of the same part seen from the side, Figure 4 is a view taken in the direction of the arrow in Figure 1, Figure 5 is a view taken in the direction of the - arrow in Figure 4, and Figure 6 is a view taken in the direction of the - arrow in Figure 1. The sectional view and FIG. 7 are a plan view of the entire machining equipment. Furthermore, FIGS. 8 to 15 show the first jig. FIG. 8 is a plan view of the lower part, FIG. 9 is a sectional view of the same, and FIG. Figure 11 is a view taken along arrows XI--XI, Figure 12 is a plan view of the upper part, Figure 13 is a front view of the same, Figure 14 is a cross-sectional view taken along arrows - of Figure 12, and Figure 15 is a view taken along arrows of Figure 12. A schematic diagram, also
Fig. 16 is a hydraulic and pneumatic circuit diagram showing the operating system of the first jig, Fig. 17 is a plan view of the jig operating state confirmation loader, Fig. 18 is a sectional view taken along the - arrow in Fig. 17, and Fig. 19 is the same. -This is a view from the arrow. Furthermore, FIGS. 20 to 31 show the second jig, FIG. 20 is a sectional view, and FIG. 21 is a sectional view of the second jig.
The XI-XI arrow view in the figure, and the XII-XII view in Figure 22
FIG. 23 is a plan view of the same, FIG. 24 is an enlarged view of the main parts of the clamp mechanism, FIG. 25 is an enlarged view of the main parts of the locator, FIG. 26 is a view of FIG. The figure is an enlarged sectional view of the locking mechanism, No. 28.
Figures 31 to 31 are piping diagrams of the second jig, Figure 32 is a pneumatic circuit diagram showing the operating system of the second jig, Figure 33 is an explanatory diagram of the operation of the first jig, and Figure 34 is a diagram of the second jig. FIG. 35 is a schematic diagram of a swingable jig. MC...Machining center, RR...Robot,
APC...Automatic pallet changer, W...Workpiece,
W ₁ ...First workpiece, _W2 ...Second workpiece, JA...
...First jig, JB...Second jig, PT...Pallet, J...Jig, 1...Rotary table (support stand), 57...Pallet clamp plate, 63
...locate pad, 65...locate pin, 6
9...Positioning hole, 82...Jig operating circuit, 83
...First supply path, 84...First supply path, 85...
Pallet seating confirmation circuit, 86, 87...Second supply path, 88...Positioning mechanism, 108...Air motor, 112...Hydraulic pump, 114...Mechanical valve, 129...Clamp mechanism, 144...
Solenoid switching valve, 149...Solenoid switching valve, 157...
First limit switch, 158... Second limit switch, 160... First non-contact signal transmitter, 1
61... Second non-contact signal transmitter, 160a... Transmission head, 161a... Transmission head, 160b...
...Receiving head, 161b...Receiving head, 162
... Jig operation status confirmation loader, 169 ... Swivel arm, 206 ... Clamp mechanism, 207 ... Air cylinder, 216 ... Locator, 217 ... Air cylinder, 221a ... First dog, 221b ...
Second dog, 222...First limit switch, 2
22c...Second limit switch, 231...First air operated valve, 232...Second air operated valve.

Claims (1)

[Claims] 1. A workpiece in which a pallet with a jig attached to the top that is operated by pressure fluid to releasably support a workpiece is placed on a support stand and positioned by a positioning mechanism attached to the support stand. In the machine, the support base, the positioning mechanism, and the pallet are each formed with a supply path that communicates with each other while the pallet is seated on the support base, and supplies pressure fluid to the jig to operate the jig. A machine tool characterized by: