JPS6284910A - Boring equipment - Google Patents

Abstract

PURPOSE:To improve machining efficiency and to enable cutting fluid to be prevented from infiltrating into a bearing, by providing a perpendicular tool head, boring bar, supporting jig, supporting cylinder and a fluid supply means, in the case of a boring machine for a cylinder block or the like. CONSTITUTION:A supporting cylinder 158, being mounted through a bearing 157 to the outer surface of a bar-shaped connection part 7b in a vertically provided boring bar 7, is supported by a supporting jig 8. And passages 162, 163, communicating with an annular path 159, are provided in a connection arm part 160 and the supporting cylinder 158, connecting with a fluid supply means 164. The fluid supply means 164 is suspended from a tool head 6 through an elastic rod 167. And cutting fluid from a fluid supply source, being jetted from the annular path 159 via a fluid supply pipe line 169, insertion hole 168 and the passages 162, 163 while boring is performed, is prevented from infiltrating into the bearing 157. While the boring bar, being vertically provided, enables a rotary speed to increased with no flection while the efficiency to be improved.

Description

Detailed Description of the Invention A0 Object of the Invention (1) Industrial Application Field The present invention relates to a workpiece having a hole to be bored over a relatively long distance in the axial direction, such as a plurality of workpieces for supporting a crankshaft. This invention relates to boring equipment such as engine cylinder blocks that have concentrically spaced bearing holes for supporting camshafts, and engine cylinder heads that have multiple bearing holes that are spaced concentrically for supporting camshafts. .

(2) Prior Art Conventionally, when boring such a workpiece, as disclosed in Utility Model Publication No. 58-11458, for example, the workpiece is supported with the axis of the hole to be bored in a horizontal state; Machining is performed by moving a horizontal boring bar in the horizontal direction.

(3) Problems to be Solved by the Invention In the above-mentioned conventional technology, the boring bar is relatively long as the hole to be bored is relatively long in the axial direction. The portion between the bearings is susceptible to deflection due to its own weight, causing a so-called skipping phenomenon, which may have an adverse effect on machining accuracy. Therefore, the rotational speed of the boring bar had to be kept relatively low, resulting in poor machining efficiency.

The present invention has been made in view of the above circumstances, and improves machining accuracy by preventing the boring bar from being bent by driving the boring bar to rotate around the vertical axis to perform boring processing. An object of the present invention is to provide a boring device that prevents cutting fluid from entering a bearing that supports a boring bar.

B0 Structure of the Invention (Means for Solving Problems 11) The device of the present invention includes a vertically erected support; a tool head that is movable up and down along the support and has a vertical rotating shaft; a boring bar detachably connected to the rotating shaft of the tool head; a support jig disposed at the bottom of the support at a position corresponding to the boring bar to slidably and rotatably support the boring bar; a support tube that is attached to the top of the boring bar via a bearing to be supported by the support jig, defining a downwardly open annular path between the boring bar and the outer surface of the boring bar; a fluid supply means connected to the support tube for supplying fluid;
including.

(2) Function The boring bar is suspended from the tool head, and the weight of the boring bar acts in the direction of its axis. Occurrence of the rope skipping phenomenon is prevented. Additionally, fluid is ejected from the annular passage, thereby preventing cutting fluid from entering the bearing.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIGS. a drive mechanism 4 that is movably disposed at a position corresponding to the processing station S set on the base 2 on the side of the support column 3; a feed mechanism 5 for driving the drive mechanism 4 up and down; A plurality of tool heads 6, for example, four, which are selectively and removably fixed to the lower part of the drive mechanism 4; a boring bar 7 whose upper end is removably connected to each tool head 6 and which extends downward; A plurality of, for example, four, supporting jigs 8 are selectively fixed to the lower part of the support column 3 at a position corresponding to the processing station S, that is, a position corresponding to the processing station S. For example, five camshaft bearing holes 11 are spaced apart from each other.
A workpiece support mechanism 9 for supporting and positioning a cylinder head having concentric cylinder heads; and a transport mechanism 10 for carrying the workpiece W into and out of the processing station S.

The drive mechanism 4 includes a lifting table 12 horizontally arranged above the processing station S so as to extend outward in the radial direction from the support column 3, and a rotary drive motor 13 supported and fixed on the upper surface of the lifting table 12. Equipped with.

The rotary drive motor 13 is arranged with its output shaft 14 being vertical, and the lower end of the output shaft 14 is connected to the lifting platform 12.
It rotatably penetrates the lifting platform 12 so as to protrude downward from the lower surface of the board. Moreover, the lower end of the output shaft 14 has a structure that allows spline connection by fitting the rotary shaft 54 of the tool head 6 from below. Also,
This rotary drive motor 13 has a built-in fixed position stop mechanism that allows the cutting tool 63 of the boring bar 7 to always accurately face in the direction opposite to the column 3 when the rotation is stopped.

Referring also to FIG. 3, the feed mechanism 5 is the drive mechanism 4.
A screw rod 15 that is screwed onto the lifting table 12 and extends vertically, and a feed motor 16 for rotationally driving the screw rod 15.
Equipped with. The threaded rod 15 is arranged to extend vertically along the outer surface of the support column 3, and its middle portion is screwed into the screw hole 17 of the lifting table 12. Further, the upper and lower ends of the threaded rod 15 are rotatably supported by the support column 3, and the feed motor 16 is connected to the upper end of the threaded rod 15 and fixed and disposed on the upper portion of the support column 3. Moreover, feed motor 1
6 can freely switch its rotation direction between forward and reverse directions.

A pair of guide rails 18 extending vertically are fixed in parallel to the outer surface of the support column 3 on both sides of the threaded rod 15, and the lifting platform 12 is fitted into these guide rails 18. Therefore, the elevating table 12 is prevented from angularly displacing the threaded rod 15 around its axis, and moves up and down along both guide rails 18 in accordance with the rotation of the threaded rod 15 due to the operation of the feed motor 16.

Further, a pair of balance cylinders 19 extending vertically are fixed to the upper part of the column 3 in correspondence with both sides of the lifting table 12, and rods that slide into each balance cylinder 19 are fixed to the lifting table 12.

As a result, the lifting platform 12 moves up and down while maintaining a horizontal position.

Further, with reference to FIG. 4, each tool head 6 is
Boring bars 7 of different types are connected and supported to accommodate changes in the type of work W, and are arranged around the support 3 at intervals of 90 degrees. These tool heads 6 are each supported by a head carrier 22, and by moving the head carrier 22 around the support column 3, any tool head 6 and polling half can be made to correspond to the processing station S, that is, the drive mechanism 4. Can be brought into position.

The upper outer surface of the column 3 has a cross section that opens downward.
A U-shaped upper guide member 23 is fixed in an arc shape along a virtual circumference centered on the center position of the support column 3, excluding the drive mechanism 4. Further, at a lower part spaced apart from the upper guide member 23, a lower guide member 24 is supported by a bracket 25 and has a U-shaped cross section that opens upward, and has an arc shape corresponding to the upper guide member 23. It is fixed to the outer surface of 3.

On the other hand, the elevating table 12 in the drive mechanism 4 includes the elevating table 1
When the upper guide member 2 is located at the predetermined uppermost position, the upper guide member 2
3, and a lower guide groove 27 that connects to the lower guide member 24 is provided, and both guide grooves 26.27 have the same radius of curvature as the radius of curvature of the upper and lower guide members 23.24. It is curved.

Each head carrier 22 has the upper and lower guide members 23.2.
It is curved in an arc shape with a radius of curvature corresponding to 4, and is disposed between the upper and lower guide members 23 and 24. Also, between each head carrier 22, a connecting piece 28 curved in an arc shape like the head carrier 22 is arranged, and each head carrier 22 is connected to the adjacent connecting piece 28, respectively.

That is, connecting arms 29 projecting outward are provided at both circumferential ends of the head carrier 22, and connecting pins 30 are implanted at the tips of these connecting arms 29, respectively. On the other hand, a connecting flange 31 is provided on the outer surface of the connecting piece 28 at a position above the connecting arm 29 and protrudes over the entire circumference. 30 from below, each head carrier 22 and each connection piece 28 are connected to each other.

Sector gears 33 and 34 are fixed to the top of each head carrier 22 and the top of each connection piece 28, respectively.
These sector gears 33, 34 constitute an internal gear 35 as a whole.

Further, a plurality of rollers 36 and 37 that can be moved within the upper guide member 23 and the upper guide groove 26 are pivotally supported on the upper part of the head carrier 22 and the upper part of the connecting piece 28, respectively. Further, at the lower part of the head carrier 22 and the lower part of the connecting piece 28, there are a plurality of rollers 38, 39 that can be moved within the lower guide member 24 and the lower guide groove 27, and the outer upper edge of the lower guide member 24 and the lower guide groove 27. A plurality of rollers 40, 41 which are movable on the outer upper edge of the rollers 40, 41 are each pivotally supported. As a result, each head carrier 22 and each connecting piece 28 are connected to each other, and between the upper and lower guide members 23 and 24, as well as between the upper and lower guide members 23 and 24.
It can be moved guided between the lower guide grooves 26, 27, ie rotated around the column 3.

An indexing mechanism 42 is provided to rotate each head carrier 22 and the connecting piece 2 in this way to bring any desired head carrier 22, ie, tool head 6, to the position of the drive mechanism 4. This index mechanism 42 is
an index moke 43; a gear box 44 containing a gear train (not shown) for decelerating and transmitting the driving force of the index moke 43; It consists of a drive gear 46 that meshes with the drive gear 46. The gear box 44 is fixed to the upper part of the support column 3, and the index moke 43 is fixed and supported to the upper part of the gear box 44. The output shaft 45 projects downward from the gear box 44, and a drive gear 46 is fixed to the lower end of the output shaft 44.

According to the index mechanism 42, the internal gear 35, that is, the head carrier 22 and the connecting piece 28 are rotated by the operation of the index moke 43, so that a desired head carrier 22 can be brought below the drive mechanism 4.

The tool heads 6 are respectively supported on the head carriers 22 so as to be able to move relative upwardly.

That is, the head carrier 22 has each of the connecting arms 29
Support arms 47 are integrally protruded below the respective connecting arms 29 and each support arm 47, and support bins 48.
49 will be erected.

On the other hand, the tool head 6 is provided with upper and lower arms 50.51 that can be placed on the connecting arms 29 and the supporting arms 47, and these arms 50.51 have upper and lower arms 50.
Through-holes 52 and 53 are respectively drilled through which the holes 8 and 49 can be inserted. Moreover, the thickness of each ridge 50°51 is the support pin 48.4
The length of the support pin 48.9 is smaller than the length of the support pin 48.
49 inserted into the through holes 52.53, each ridge 50.
It is possible to move the tool rad 6 upwardly relative to the head carrier 22 so as to cause the tool 51 to move upwardly away from the connecting arm 29 and the support arm 47 .

A rotating shaft 54 whose axis is vertical is rotatably supported on the tool rod 6, and this rotating shaft 54 is rotatably supported around the axis.
Both upper and lower ends of the tool protrude from the tool head 6. Moreover, the length of the upward protrusion of the rotating shaft 54 from the tool head 6 cannot reach the lower end of the output shaft 14 in the drive mechanism 4 when the respective ridges 50 and 51 are placed on the connecting arm 29 and the supporting arm 47. First, when the tool head 6 is raised and fixed to the drive mechanism 4, the upper end of the rotating shaft 54 is splined to the lower end of the output shaft 14.

In order to fix the tool head 6 to the drive mechanism 4, a plurality of locking members 55, for example four, are provided on the upper surface of the tool head 6.
is fixed. These locking members 55 have engagement grooves 56 that are approximately T-shaped in cross section, and these engagement grooves 56 are fixed to the tool along the circumference around the center of rotation of the rad 6. , placed. On the other hand, four clamp cylinders 57 are fixed and supported on the upper surface of the elevating table 12 in the drive mechanism 4, corresponding to each of the locking members 55. These clamp cylinders 57 are arranged with their axes vertical,
The rod 58 movably penetrates the lifting table 12 and protrudes below the lifting table 12, and the lower end of the rod 58 has a substantially T-shaped retainer that can be engaged with the locking groove 56 of each locking member 55. A joint portion 59 is provided.

When each clamp cylinder 57 is extended, the engaging portion 59 of each rod 58 is connected to the connecting collar 31 and the supporting arm 47.
It is in a position where it can be held by the locking member 55 of the tool head 6 placed above, and by contracting the clamp cylinder 57 with the engaging portion 59 engaged with the locking member 55, the tool is Rad 6 is pulled upward.

Further, a plurality of, for example, four, positioning bins 60 are erected on the upper surface of the tool head 6, and four fitting tubes 61 into which the respective positioning bins 60 can be fitted are fixed to the lower surface of the lifting table 12. When the rod 6 is pulled up to the tool by the clamp cylinder 57, each positioning pin 60 is fitted into the fitting tube 61, thereby positioning the tool head 6.

Moreover, the outer surface of the positioning pin 60 is provided with a stepped portion facing upward, and when the tool head 6 is pulled up by the clamp cylinder 57, the stepped portion comes into contact with the lower surface of the fitting cylinder 61, thereby preventing further lifting operation. Along with being
A tool head 6 is fixed to a lifting platform 12.

In FIG. 5, the upper end of a boring bar 7 is removably connected to the lower end of a rotating shaft 54 in the tool head 6 via a connecting mechanism 151, and the boring bar 7 has the same axis as the tool head 6. It will be suspended from. Moreover, a cutting tool 63 is fixedly installed on one side of the boring bar 7 in a manner corresponding to the spacing between the respective bearing holes 11 in the workpiece W to be bored.

The coupling mechanism 151 is a conventionally known one consisting of an adapter 152 fixed to the lower end of the rotating shaft 54 and a mounting member 153 fixed to the upper end of the boring bar 7. The adapter 152 and the mounting member 153 are The adapter 152 and the attachment member 153 are firmly connected by engaging each other by abutting and slightly relative angular displacement, and by screwing the screw member 154 facing the outer surface of the adapter 152.

The boring bar 7 has a boring bar main body 7a having a cutting tool 63, and a rod-shaped connecting portion 7b for fixing to the mounting member 153 of the connecting mechanism 151.
56, and between the upper part of the boring bar 7, that is, the mounting member 153 and the flange 156,
A support tube 158 is attached to the outer surface of the connecting portion 7b with a pair of bearings 157 interposed therebetween. This support tube 158 is supported by the support jig 8, and an annular path 159 open downward is defined between the support tube 158 and the flanges 155, 156 of the boring bar 7.

Referring also to FIG. 6, a presser plate 160 for holding down the outer ring of the bearing 157 is fixed to the upper end of the support cylinder 158, and the presser plate 160 extends upwardly and bends outwardly. A connecting arm portion 161 is integrally provided. Furthermore, the connecting arm portion 161 and the support cylinder 158 have passages 162 and 163 for supplying fluid, such as air, to the annular passage 159.
A fluid supply means 164 is connected to the passage 162.

The fluid supply means 164 includes a valve body 165 suspended from the tool head 6 and a valve rod 166 that is fitted and fixed to the connecting arm 161 and inserted into the valve body 165.

The valve body 165 is suspended from the tool head 6 via a pair of elastic rods 167 fixed to the lower part of the tool head 6, and an insertion hole 168 extending vertically is bored in the valve body 165. . Moreover, the valve body 16
A fluid supply conduit 169 is connected to the upper end of 5. Further, on the inner surface of the insertion hole 168, a plurality of annular grooves 170, 171, 172 are provided at equal intervals in the axial direction, and on the outer surface of the valve body 165, each annular groove 170, 171, 172 is provided at equal intervals in the axial direction. Fluid supply conduits 173, 174, and 175 are connected to the fluid supply lines 171 and 172, respectively.

In FIG. 7, each fluid supply pipe line 169°173~
175 is connected to a fluid manifold 176 secured to the top surface of the tool head 6. This fluid manifold 17
6 is four connection holes 177, 178, 179, 180 that communicate with each of the fluid supply pipes 169, 173 to 175 individually.
The lifting platform 12 has connection holes 177 to 180.
Connection holes 181, 182, 183, 1 that can communicate individually with
A fluid manifold 184 having 84 is secured. Both fluid manifolds 176 and 185 are connected to each other when the rad 6 is pulled upward to the tool and fixed to the lifting platform 12, and at that time, the connecting hole 17? , 181; 17
8,182; 179°183; 180,184 communicate with each other.

In addition, each connection hole 181 to 184 of the fluid manifold 185
Fluid supply pipes 186, 187, 188, and 189 are individually connected to the fluid supply pipes 186 to 189.
189 are commonly connected to a fluid supply source 190. In addition, solenoid valves Sl and S that operate for each type of boring bar 7 are located in the middle of the three fluid supply pipes 187 to 189 that can communicate with the respective annular grooves 170 to 172 of the valve body 165.
2. S3 and pressure switch 191, 192° 193
are provided respectively. These pressure switches 191~
193 is activated when the pressure within the fluid supply pipes 187 to 189 exceeds a certain value.

In FIG. 8, the valve rod 166 has a communication passage 194 extending over its entire length, and is fitted and fixed to the connecting arm 161. Thereby, the communication path 194 is made to communicate with the path 162, and the pulp rod 166 is vertically installed. An enlarged portion 195 is provided at the upper end of the hull plot 166, and the enlarged portion 195 extends through the insertion hole 16 of the valve body 165.
It has an outer diameter large enough to be able to slide on. Moreover, enlarged part 19
5 is selected to be slightly larger than each of the annular grooves 170 to 172 in the valve body 165, and the outer surface of the enlarged portion 195 has grooves that slide into the inner surface of the insertion hole 168 on both sides of the annular grooves 5170 to 172. abutting annular seal member 196;
197 is fitted.

The length of this pallu blonde 166 is determined according to the outer diameter of the corresponding boring bar 7, and therefore,
Each annular groove 170-172 has a corresponding boring bar 7
Accordingly, both sides thereof are selectively blocked by enlarged portions 195.

9 and 10, at the bottom of the column 3, four supporting jigs 8 for slidably and rotatably supporting different types of boring bars 7 are arranged at intervals of 90 degrees around the column 3. They are placed with a gap between them. These support jigs 8 are supported by a cylindrical jig carrier 64 surrounding the support column 3, and by angularly displacing the jig carrier 64 around the vertical axis, a desired support jig 8 can be moved to the processing station. It can be brought to S.

The lower outer surface of the pillar 3 has a cross section that opens downward.
A U-shaped upper guide rail 65 is fixed along an imaginary circumference centered on the center position of the support 3, and a cross section that opens upward is provided below at a distance from the upper guide rail 65. A lower guide rail 66, which has a U-shaped surface and extends along an imaginary circumference corresponding to the upper guide rail 65, is fixed.

The jig carrier 64 is arranged between the upper and lower guide rails 65 and 66, and on the upper part of the jig carrier 6'4, a plurality of rollers 67 that move within the upper guide rail 65 are spaced apart from each other. A plurality of rollers 68 are rotatably supported and rotated on the lower guide rail 66 at the lower part of the jig carrier 64, and a plurality of rollers 68 are rotatably supported with intervals between them. rollers 141 are supported with a space between them. Therefore, the jig carrier 64 is rotatable about the vertical axis guided by the upper and lower guide rails 65,66.

In order to rotate the jig carrier 64, an indexing mechanism 69 is arranged at the bottom of the column 3.

This index mechanism 69 has an index moke 70
and a gear box 71 containing a gear train (not shown) for decelerating and transmitting the driving force of the index motor 70;
The driving force from the driving gear 72 and the gear box 71 is transferred to the driving gear 7.
and a gear train 73 for transmitting data to gear box 71
is fixed to the lower part of the support column 3, and the index mask 7o is fixed to the lower part of the gear box 71.

On the other hand, an internal gear 74 is fixed to the lower part of the jig carrier 64, and the drive gear 72 meshes with the upper gear 74.

Therefore, when the index moke 70 is actuated, the driving gear 72 causes the internal gear 74, that is, the jig carrier 64
is driven to rotate.

The support jig 8 is basically a rectangular jig main body 75 and at least two bearing portions 76 and 77 are integrally provided. The jig main body 75 is vertically longer than the workpiece W to be bored, and one bearing part 76 protrudes from the jig main body 75 so as to be located above the workpiece W, and the other bearing part 77 is provided so as to protrude from the shaft body 75 so as to be located below the workpiece W. Support holes 78, 79 having vertical axes are provided concentrically in both wheel receivers 76, 77.

Moreover, the inner diameter of the upper support hole 78 is determined so that the support cylinder 158 disposed at the upper part of the boring bar 7 can be slidably inserted thereinto. Further, a bearing 81 for slidably and rotatably supporting the lower part of the boring bar 7 is mounted in the lower support hole 79.

Further, a guide protrusion 82 is integrally provided and protrudes in the same direction as both bearing parts 76 and 77, and this guide protrusion 82
A guide hole 83 concentric with the support holes 78 and 79 is bored in the support hole 78, 79. This guide hole 83 is formed in a key shape so that the cutting tool 63 of the boring bar 7 can be inserted therethrough.

Such a support jig 8 is supported by the jig carrier 64 so as to be able to approach the jig carrier 64 and move away from the jig carrier 64 within a regulated range.

That is, on the jig main body 75 of the support jig 8, a pair of upper support protrusions 84 and a pair of lower support protrusions 85 are provided on each of the bearing parts 7.
6.Protrudes on the opposite side from 77.

At the tips of these upper and lower support protrusions 84 and 85, downwardly bent bars 86 and 87 are provided, respectively. On the other hand, on the jig carrier 64, a pair of ball holding cylinders 88 corresponding to the rain support protrusions 84 and a pair of ball holding cylinders 88 corresponding to the rain support protrusions 85 are provided at positions spaced apart by 90 degrees in the circumferential direction. A pair of lower holding cylinders 89 are provided. Each holding cylinder 88, 89 has an axis parallel to one diameter line of the jig carrier 64, and is fixed through the jig carrier 64, and the upper part of the protruding end of each holding cylinder 88, 89 has an axis parallel to one diameter line of the jig carrier 64. , upwardly protruding protrusions 90 and 91 on which the lower surfaces of the lower support protrusions 84 and 85 are placed are respectively provided. Further, from the protruding ends of both holding cylinders 88 and 89, a pressing pin 9 is inserted.
2.93 respectively protrude, and these pressing pins 9
2.93 are biased in the projecting direction by springs 94.95 housed within each holding cylinder 88.89.

According to this structure, the upper and lower support protrusions 84 of the support jig 8
. It is supported by the jig carrier 64 in a state of contact. When the support jig 8 is brought to the position of the processing station S in this state, both the support holes 78 and 79 and the guide hole 83 of the support jig 8 are opened.
The axis of the supporting jig 8 is located outward from the axis of the boring bar 7 located above it, and during boring, it is necessary to move the support jig 8 close to the jig carrier 64 and fix it there.

Therefore, at the position corresponding to processing station S,
A jig clamping cylinder 96 corresponding to the upper part of the jig main body 75 and a jig clamping cylinder 97 corresponding to the lower part of the jig main body 75 are disposed on the sides of the jig main body 75 . The rods 98, 99 of these jig clamp cylinders 996, 97 extend outward along one diameter line of the jig carrier 64, and the ends of the rods 98, 99 are connected to the clamp member 100.
101. In addition, each clamp member 100
．． 101 is supported by the support column 3 with its midway as a fulcrum, and rotates around the horizontal axis in response to the expansion and contraction operations of the jig clamp cylinders 96 and 97.

On the other hand, the jig main body 75 of the support jig 8 is provided with a protruding locking protrusion 102 bent in an L shape so that the other end of the upper clamp member 100 can be engaged with, and An L-shaped locking protrusion 103 is integrally provided to engage the other end of the member 101.

Also, on the side of the support column 3 facing the processing station S, there are four knock pins 10 having a regulating step 104 facing outward.
5 are provided protrudingly, and four positioning holes 106 are bored in the jig main body 75 corresponding to the knock pins 105.

In the part corresponding to the processing station S, extending between the lower part of the support column 3 and the lower part of the lifting platform 12 of the drive mechanism 4,
A bellows-shaped cover 107 is provided to cover the threaded rod 15. Therefore, the threaded rods 15 are always layered regardless of the movement of the drive mechanism 4 up and down.

The transport mechanism 10 includes a pallet guide rail 110 horizontally arranged on the opposite side of the support column 3 with respect to the processing station S.
and the guide rail 11 with the workpiece W supported and fixed.
0 and a pallet 111 guided by 0. The pallet guide rail 110 includes an upper guide portion 114 in which a plurality of guide rollers 113 are arranged between a pair of guide plates 112 facing each other, and a pair of guide plates 115 facing each other.
It is configured by connecting a lower guide part 117 with a plurality of guide rollers 116 arranged therebetween by a connecting member 118,
It is arranged horizontally except for the part corresponding to the processing station S.

The pallet 111 has a flat plate shape and is guided by the upper and lower guide parts 114 and 117 of the pallet guide rail 110 and transported to a position corresponding to the processing station S.
It is carried out from the processing station S. This palette 11
1 includes a plurality of positioning pins 11 that are fitted into the workpiece W.
9, upper and lower clamp members 120 and 121 for engaging and fixing the work W, and an abutment pin 122 that abuts the work W. By fitting the positioning pin 119 to the workpiece W and abutting the workpiece W to the abutting pin 122, and fitting the clamp members 120, 121 to the workpiece W, the workpiece W is aligned with the pallet 11 with the bearing hole 11 vertical.
Fixed to 1.

The workpiece support mechanism 9 is disposed at a portion corresponding to the processing station S on the opposite side to the support column 3. The workpiece support mechanism 9 includes a movable table 125 that is movable in a horizontal direction perpendicular to the transport mechanism 10, a pressing cylinder 126 for horizontally driving the movable table 125, and a press cylinder 126 that abuts the movable table 125 and presses the movable table 125.
a stop position switching cylinder 127 that regulates the horizontal movement of 5 in two stages, and a reversing motor 128 fixed to the moving table 125.
and a pallet holding frame 130 fixed to the tip of the output shaft 129 of the reversing motor 128.

The moving table 125 is movable along a pair of guide rods 131 fixed on the base 2 along the horizontal direction perpendicular to the transport mechanism 10, and the moving table 125 has a pressing cylinder 1.
Twenty-six rods 132 are connected. Pressing cylinder 12G
is fixed to the end of the base 2 on the opposite side of the support column 3 with respect to the processing station S, and by operating the press cylinder 126 to expand and contract, the direction in which the movable table 125 approaches the processing station S and the direction of the processing station Move in the direction away from S.

The stop position switching cylinder 127 is disposed facing the moving table 125 in a portion near the processing station S, and switches the stopping position of the moving table 125 between a state in which the rod 133 is extended and a state in which it is contracted. be able to. That is, when the movable base 125 is brought into contact with the rod 133 in the extended state, and when the movable base 125 is brought into contact with the rod 133 in the contracted state.
The stopping position of the movable table 125 changes depending on when the movable table 125 is brought into contact with the movable table 125.

The output shaft 129 of the reversing motor 128 rotatably passes through the moving table 125 and protrudes toward the processing station S.
A pallet holding frame 130 is fixed to the tip of this output shaft 129. The pallet holding frame 130 is basically formed into a flat plate shape, and the upper and lower ends of the pallet holding frame 130 have the upper and lower ends of the transport mechanism 10,
Guide grooves 134, 13 corresponding to lower guide parts 114, 117
5 are provided respectively. Furthermore, the pallet holding frame 13
0 is provided with a pair of clamp cylinders 136 for fixing the pallet 111 by coming into contact with the pallet 111, and the clamp cylinders 136 are extended with the pallet 111 fitted to the guides 1134 and 135. As a result, the pallet 111 is supported and fixed to the pallet holding frame 130.

In this workpiece support mechanism 9, the workpiece W conveyed by the conveyance mechanism 10 can be moved to the processing station S in two stages and supported. That is, by extending the pressing cylinder 126 while the stop position switching cylinder 127 is extended, the workpiece W is moved in the direction opposite to the column 3, and the axis of the bearing hole 11 is slightly shifted from that of the boring bar 7. The workpiece W can be moved and fixed to a position where the axis of the bearing hole 11 is aligned with the boring bar 7 by bringing the workpiece W to a position where the axis of the bearing hole 11 is aligned with the boring bar 7 by extending the pressing cylinder 126 while the stop position switching cylinder 127 is contracted. can.

In order to guide the movement of the workpiece W when moving the axis of the bearing hole 11 to a position where it coincides with the boring bar 7, a pair of guide posts 138 having a fitting hole 137 at the tip are provided on the pallet 111, facing toward the column 3 side. It is installed protrudingly. - The jig main body 75 of the force support jig 8 includes a positioning pin 14 having a fitting protrusion 139 at its tip that can be fitted into the fitting hole 137.
0 is set protrudingly.

Next, the operation of this embodiment will be described. The workpiece W is transported to a position corresponding to the processing station S by the transport mechanism 10. As a result, the pallet 111 supporting the workpiece W is moved through both guide grooves 13 of the pallet holding frame 130.
4,135 fits. By extending the clamp cylinder 136 in this state, the pallet 111 is fixed to the pallet holding frame 130. Next, while keeping the stop position switching cylinder 127 in the extended state, the pressing cylinder 1 is
26 is extended, the moving table 125 moves until it comes into contact with the rod 133 of the stop/normal position switching cylinder 127, and as a result, the workpiece W is moved so that the axis of the bearing hole 11 is on the side opposite to the column 3 rather than directly below the boring bar 7. Move it to a position slightly shifted from the .

By operating the feed motor 16 of the feed mechanism 5 with the workpiece W moved in this way, the holder 15
is rotated to lower the drive mechanism 4, tool head 6, and boring bar 7.

At this time, the axis of the bearing hole 11 of the workpiece W is slightly deviated from the boring bar 7 by several U, and the boring bar 7
is stationary at a fixed position with each bar 63 facing accurately in the direction opposite to the column 3, so each bar 63 can hold the boring bar 7 in the bearing hole 11 without interfering with the bearing hole 11, as shown in FIG. It can be inserted into the hole 11. With the boring bar 7 lowered, the support cylinder 158 provided on the boring bar 7 is fitted into the support hole 78 of the support jig 8, the lower end of the boring bar 7 is fitted into the bearing 81, and the boring bar 7 is further fitted into the support hole 78 of the support jig 8. The middle part is inserted into the guide hole 83.

After the boring bar 7 is slidably and rotatably supported by the lowered support jig 8, the stop position switching cylinder 1
27 is contracted and the press cylinder 126 is extended again. As a result, the moving table 125 can be moved forward by the amount that the rod 133 of the stop position switching cylinder 127 is reduced, and the workpiece W supported by the pallet 111 fixed to the pallet holding frame 130 is moved toward the column 3 side. Moving. Therefore, the axis of the workpiece W coincides with the axis of the boring bar 7, as shown in FIG. Moreover, at this time,
The work W comes into contact with the knock pin 105 of the support jig 8, preventing further movement of the work W, and
positioning is performed.

When the workpiece W is positioned with the axis of its bearing hole 11 aligned with the boring bar 7, each bite 63 of the boring bar 7 is located above each bearing hole 11, and the boring bar 7 is moved by the drive mechanism 4. Each cutting tool 63 is lowered by the feed mechanism 5 while rotating.
Boring of the bearing hole 11 is performed by.

At the start of this boring process, whether the polling tool X-7 is appropriate for the diameter of the bearing hole 11 is checked by operating the pressure switches 191-193. That is, in the case shown in FIG. 8, since both sides of the annular groove 170 are shut off by the pulp protector throat 166 when the solenoid valve S1 is opened, only the pressure switch 191 is operated, and the signal from the pressure switch 191 is not affected. The type of boring bar 7 can be accurately confirmed by lighting up an indicator light (not shown) accordingly.

Moreover, during the boring process, the fluid supply source 19
The fluid, for example air, from
8. The cutting fluid is supplied to the annular path 159 through the communication path 194 and the paths 162 and 163, and is ejected downward from the annular path 159, thereby reliably preventing cutting fluid from entering the bearing 157.

When the boring process is completed, the stop position switching cylinder 127
starts to extend again. As a result, the movable table 125 moves back by several n in the direction away from the support column 3, and the axis of the bearing hole 11 becomes eccentric from the axis of the boring bar 7. In this state, the boring bar 7 is raised, but at this time, each bite 6
3 does not come into contact with the bearing hole 11, so no scratches such as cutter marks are left in the bearing hole 11. After that, the press cylinder 126 is reduced and the pallet holding frame 111 is
is moved back to the position of the transport mechanism 10, and the clamping cylinder 136 is further reduced to release the clamp state of the pallet 111 to the pallet holding frame 130, and then the pallet 111 is carried out from the processing station S by the transport mechanism 10. .

In this way, the boring process of the workpiece W is completed, but when the type of the workpiece W changes, the corresponding boring bar 7 and support jig 8 are moved to the corresponding position in the machining station S according to the change in type. can be placed at any time.

That is, by operating the index motor 43 of the index mechanism 42, the tool head 6 supporting a desired boring bar 7 is moved to a position corresponding to the machining station S, and the clamp cylinder 57 moves the tool head 6 to the tool. It can be fixed to the drive mechanism 4. Also, the index moke 70 of the index mechanism 69
, the desired support jig 8 is moved to a position corresponding to the processing station S, and the support jig 8 is fixedly placed on the processing station S by operating the jig clamp cylinders 96 and 97. can do. Therefore, depending on the type of workpiece W, the boring bar 7
Moreover, the support jig 8 can be changed, and it is possible to cope with production of a wide variety of products in small quantities.

In the workpiece support mechanism 9, the reversing motor 128 is provided for reversing the workpiece W for slicing the end face of the workpiece W in addition to boring. It is not necessary when performing only

C0 Effects of the Invention As described above, the device of the present invention includes a vertically erected support; a tool head that is movable up and down along the support and has a vertical rotation axis; and an upper end that rotates the tool head. a boring bar detachably connected to the shaft; a support jig disposed at the bottom of the support at a position corresponding to the boring bar to slidably and rotatably support the boring bar; a support cylinder attached to the top of the boring bar via a bearing to be supported by the support jig and defining an open annular passage between the outer surface of the boring bar; and a support tube for supplying fluid to the annular passage. and a fluid supply means connected to the support tube, which prevents deflection of the boring bar, increases the rotation speed, and improves machining efficiency, and also jets fluid from the annular path to absorb the cutting fluid. can be prevented from entering.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall perspective view, FIG. 2 is an overall vertical sectional view, and FIG.
-m line enlarged sectional view, Fig. 4 is a large sectional view taken along the TV-IV line in Fig. 2, Fig. 5 is an enlarged longitudinal sectional view of the V section in Fig. 2, and Fig. 6 is a view from the ■ arrow in Fig. 5. Fig. 7 is a fluid supply circuit diagram, Fig. 8 is an enlarged vertical sectional view of the valve body and pallbrond, and Fig. 9 is a diagram of the fluid supply circuit.
The figure is an enlarged sectional view taken along line IX-IX in Figure 2, and Figure 10 is an enlarged cross-sectional view of Figure 2.
Figure 11 is an enlarged longitudinal cross-sectional view of the main part showing the state in which the boring bar is inserted into the bearing hole of the workpiece, and Figure 12 is an enlarged view taken along the line X-X. Figure 12 is the axis of the bearing hole of the workpiece aligned with the boring bar. FIG. DESCRIPTION OF SYMBOLS 1... Boring processing device, 3... Support column, 6... Tool head, 7... Boring bar, 8... Support jig, 11... Bearing hole, 54... Rotating shaft , 157...
Bearing, 158... Support cylinder, 159... Annular path, 16
4... Fluid supply means, W... Work Patent applicant Honda Motor Co., Ltd. Figure 7 Figure 8 Figure 12 Figure 11

Claims (1)

[Claims] A tool for boring a workpiece having a hole to be bored over a relatively long distance in the axial direction, including a vertically erected support; a tool that is movable up and down along the support and has a vertical rotating shaft. a head; a boring bar whose upper end is removably connected to the rotating shaft of the tool head; and a boring bar disposed at the lower part of the support at a position corresponding to the boring bar to slidably and rotatably support the boring bar; a supporting jig; a supporting tube that defines a downwardly open annular path between the outer surface of the boring bar and is attached to the upper part of the boring bar via a bearing to be supported by the supporting jig; and a fluid supply means connected to a support tube to supply fluid to the annular path.