JPH06344219A - Cutting device and machine tool equipped with the same - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cutting device capable of cutting a long work without generating burrs on a cutting surface, and a machine tool including the cutting device. [Construction] The machine tool 1 includes a cutting device 10, a work transfer mechanism 20 for transferring a work W cut by the cutting device 10, and an NC lathe 30 for lathing the cut work W. The cutting device 10 has a spindle drive mechanism 40 in which an actuator 14 rotates a main spindle 11 and a sub spindle 12 at a low speed at the same speed via a rack, a pinion, a rotation transmission shaft 143, and the like, and a cutting blade 51.
Rotates the work W about its central axis L twice before cutting the work W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting a long work piece and a machine tool having the cutting device.

[0002]

2. Description of the Related Art In a conventional cutting device, while a work is fixed by a work holding device, a cutting blade is advanced toward the work while rotating or reciprocating the work, and It is common to cut. Here, since burrs are generated on the cut surface of the work along the approach direction of the cutting blade, the deburring step is performed after cutting the work. Therefore, there is a problem that the step of cutting the work and the step of lathing the work after cutting cannot be performed continuously, and the processing cost cannot be reduced.

In view of the above problems, the object of the present invention is to
An object of the present invention is to provide a cutting device capable of cutting a long work without generating burrs on the cutting surface, and a machine tool including the cutting device.

[0004]

In order to solve the above problems, in the cutting apparatus according to the present invention, a work holding means capable of holding a long work and a work held by the work holding means are provided. A cutting blade that advances while rotating or reciprocating from a direction perpendicular to the axis to cut the work, and a work rotating means that rotates the work held by the work holding means at a low speed around the axis when cutting the work. And are provided.

Here, the work holding means is, for example, a first spindle to which a long work before cutting is supplied,
A second spindle that holds the work on the opposite side of the spindle with respect to the cutting position of the work with respect to this spindle, and in this case, the work rotating mechanism can synchronize the first and second spindles with each other. It can be composed of a spindle drive mechanism that drives at low speed.

In the present invention, it is preferable to provide a work feeding mechanism for feeding a long work before cutting from the back side of the first spindle and feeding it toward the second spindle. In this case, the work feeding is performed. The mechanism can be configured by a support member for the work and a height position adjusting mechanism for centering the work by adjusting the height position of the support member using the tapered surface. Here, when a plurality of work supporting members are arranged in the work feeding direction, the height position adjusting mechanism supports the lower side of each work supporting member by, for example, a tapered surface inclined in the work feeding direction. It is preferable that a plurality of bases and a base position adjustment mechanism that adjusts the position of the work supporting member on the tapered surface by moving the bases in the work feed direction are used.

In the present invention, a work holding section for holding the next work to be set and a work supply means for transferring the held work to the work sending means are provided at the side position of the work sending means. Preferably, in this case, the work supply means includes, for example, a work receiving member provided with a guide portion for moving the work in the horizontal direction by its own weight from the position where the work is received in the work holding portion to the position directly above the work sending means. And a state in which the guide portion of the work receiving member is retracted to a position below the work holding portion, and the work is switched from the retracted state to a state in which the guide portion of the work receiving member appears in a position where the work can be received in the work holding portion. It is preferably configured by a receiving member drive mechanism.

In the present invention, utilizing the fact that the cutting device can cut the work without generating burrs, the cutting device and the work transfer means for discharging the work cut by the cutting device therefrom. A machine tool suitable for lathing a long work can be configured by integrating with an NC lathe that performs lathe processing on the work discharged by the work conveying means.

[0009]

In the cutting device according to the present invention, when the work holding means holds the long work, the cutting blade is inserted into the work from a direction perpendicular to the axial direction of the work to cut the work. The work rotating mechanism rotates the work at low speed around its axis. For this reason, the cutting blade always enters from the edge of the cutting surface of the work toward the center, so that burrs do not occur on the cutting surface of the work.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A machine tool having a work cutting device according to an embodiment of the present invention will be described below with reference to the drawings.

(Overall Configuration) FIG. 1 is a schematic configuration diagram showing a configuration of a main part of a machine tool provided with a cutting device of this example.

In the figure, a machine tool 1 includes a cutting device 10 for cutting a long work W (bar steel), and a work transfer mechanism 20 for discharging the work W cut by the cutting device 1 from the cutting device 10. It has an NC lathe 30 for lathing the work W discharged by the work transfer mechanism 20. The NC lathe 30 has the same configuration as a known NC lathe except that it constitutes the machine tool 1 integrated with the cutting device 10, and therefore detailed illustration and description thereof will be omitted.

(Structure of Cutting Device) The cutting device 10 is a work holding mechanism capable of holding a long work, and a main spindle 11 (spin chuck) to which a long work before cutting is supplied and the main spindle. A sub-spindle 12 that holds the front end side of the work W at a position facing 11
Have and. Sub spindle 12 and main spindle 1
An actuator 13 for moving the sub-spindle 12 forward (in the direction of arrow A) and backward (in the direction of arrow B) toward the main spindle 11 is provided between the actuator 13 and 1. Also,
At the rear end of the sub-spindle 12, the presence or absence of the work W is confirmed, and the sub-spindle 12 protrudes from the main spindle 11 based on the moving distance from the reference position until the sub-spindle 12 holds the work W or its position. Work W
It has a monitoring device 16 for confirming the dimensions of. An actuator 14 mounted vertically is provided on the side of the main spindle 11, and an output shaft 141 thereof can drive the main spindle 11 at a low speed via a rack and a pinion (not shown). Further, the actuator 14 is
The sub-spindle 12 can be driven to rotate at a low speed through a rotation transmission shaft 143 provided inside the cover 142 between the sub-spindle 12 and the main spindle 11 and a pinion (not shown) on the side of the sub-spindle 12. The actuator 13, the rack and the pinion are connected to the sub-spindle 12 and the main spindle 11.
The spindle drive mechanism 40 is configured to rotate at a low speed in the direction of arrow C while synchronizing the.

Sub spindle 12 and main spindle 1
1 has a cutting unit 50 provided with a cutting blade 51 at a lower position between the cutting unit 50 and the cutting unit 50.
As shown in (a), the output rotary shaft 52 of the motor 53 is connected to the center of the cutting blade 51. The cutting unit 50
The cutting blade 51 is connected to the sub spindle 12 and the main spindle 1.
It has a lifting mechanism 54 for switching between a state of entering between 1 and 1 and a state of retracting from this state to a lower position. Further, the cutting unit 50 may be provided with a horizontal movement mechanism 55 for adjusting the entry position of the cutting blade 51 between the sub spindle 12 and the main spindle 11.

(Construction of Work Feeding Mechanism and Work Retaining Section) In FIG. 1, the cutting device 10 of the present embodiment has a long work W before cutting on the back side of the main spindle 11 from the back side of the main spindle 11. It has a work feeding mechanism 60 that feeds it and feeds it toward the sub-spindle 12, and the side position of this work feeding mechanism 60 is a work holding section 15 for holding the work to be set next. The work holding section 15 has a support base 151 on which a plurality of works W can be arranged side by side. The support base 151 is slightly inclined downward toward the work delivery mechanism 60, and the work W is attached to the tip side 152 thereof. It can be held at all times.

The work feeding mechanism 60 includes a pushing member 62 located at the rear end of the work W on the upper surface of a frame 61 extending to the back side of the main spindle 11, and a roller chain connected to the side surface of the pushing member 62. And a rotation driving device 64 that uses a ratchet 641 that rotates the belt 63 on its orbit. The pushing member 62 is rotated according to the operation of the rotation driving device 64.
Can push the rear end of the work W toward the main spindle 11.

Further, the work feeding mechanism 60 is arranged on the frame 61 in the feeding direction of the work W and
A plurality of work supporting members 66 capable of supporting the above from below,
A height position adjusting mechanism 70 is provided for adjusting the height of the work supporting member 66 to center the work W with respect to the main spindle 11.

The structures of the work supporting member 66 and the height position adjusting mechanism 70 will be described with reference to FIGS. 3 and 4.

FIG. 3 is a perspective view of one of the work supporting members 66 as seen from the rear side, and FIGS. 4 (a) and 4 (b) are side sectional views thereof.

As shown in these figures, the work support member 66 is an L-shaped support plate 67 fixed to the frame 61.
And an arm 68 screwed to the upper end side of the arm 68 so as to be swingable.
And a support roller 69 rotatable on the tip side of the arm 68. The central portion of the roller surface 691 of the support roller 69 is entangled, so that the work can be reliably supported. The arm 68 has a contact portion 681 projecting to the lower surface side, and the height position adjusting mechanism 70 has a base 71 having a tapered surface 711 that supports the arm 68 from below via the contact portion 681.
Have. The base 71 is slidable on the plane portion of the support plate 67 in the direction of arrow E (forward) and in the direction of arrow F (backward). In addition, as shown in FIG.
1, a base position adjusting shaft 72 is also connected, and a base feed mechanism 73 is connected to the rear end side of the base position adjusting shaft 72. Here, the base position adjusting shaft 72 and the base feeding mechanism 73 constitute a base position adjusting mechanism 74, and the base feeding mechanism 73 is operated to move the base 71 to the position shown in FIG.
Arrow F from the position shown in (a) to the position shown in FIG. 4 (b)
When retracted in the direction of, the position of the contact portion 681 of the arm 68 on the tapered surface 711 is switched to the front, that is, the higher position. Therefore, the arm 68 is directed obliquely upward and the support roller 69 is pushed up. Therefore, FIG.
From the state in which the thick work W shown in FIG.
Even when the thin work W shown in (b) is switched to the mounted state, the height position of the support roller 69 is switched only by operating the base feed mechanism 73, and the central axis L of the work W is changed.
Adjust the height position of the
Can be easily centered.

(Structure of Work Supply Mechanism) In FIG.
The work holding section 15 has a work supply mechanism 80 for automatically supplying the work W held on the support base 151 to the work delivery mechanism 60. This work supply mechanism 80
Is a two work receiving member 81 arranged at a position avoiding the supporting roller 69 of the work feeding mechanism 60, and a posture switching mechanism 83 (work receiving member drive) for collectively switching the postures of these work receiving members 81. Mechanism).

The constructions of the work receiving member 81 and the posture switching mechanism 83 will be described with reference to FIGS.

FIG. 5A shows two work receiving members 8
The periphery of the rearmost work receiving member 81 of FIG. 1 is shown.
Has an arm 831 connected to the base end side thereof, a horizontal operation shaft 832 connected to the base end side thereof, and an actuator 833 connected to the base end side of the operation shaft 832. Arm 83
1 is fixed to the side surface of the frame 61 with bolts or the like in a state of being rotatable about its intermediate position, while the arm 8
31 and the operating shaft 832 form a bendable node.
Therefore, the actuator 833 causes the operating shaft 83
2 is the direction of arrow G (forward) or the direction of arrow H (backward)
5A, the arm 831 rotates and the posture of the work receiving member 81 changes from the posture shown in FIG.
The posture is switched between the diagonally raised posture shown in (b).

Here, the work receiving member 81 has a width dimension that extends from the lower position of the work W of the work holding portion 15 to the upper position of the working position of the work W in the work feeding mechanism 81 in the down state. Therefore, the work receiving member 81 is located on the front end side of the work receiving member 81 as shown in FIG.
When the posture is changed from the lying posture shown in FIG. 6 to the posture rising obliquely upward as shown in FIG. 6B, only one workpiece W from the suspended workpieces W is transferred to the one edge 812 side (the workpieces) on the way. It can be picked up by the holding section 15). Further, the tip side of the work receiving member 81 is a cam-shaped guide in which the received work W can be horizontally moved by its own weight toward the other end edge 813 side (the work feeding mechanism 81 side, the direction indicated by the arrow K). It is a part 811.
The other edge 813 has a protrusion 814 as a stopper for the work W.

(Structure of Work Transfer Mechanism) Referring again to FIG. 1, the structure of the work transfer mechanism 20 will be described.

The work transfer mechanism 20 includes a rail portion 21 arranged from a position above the cutting device 10 to a position near the NC lathe 30, and an actuator 22 above the rail portion 21.
And a support table 23 that moves by. The work transfer mechanism 20 includes an actuator 24 on a horizontal portion of the support base 23.
And a work chuck 25 is provided on the lower end side thereof.
A chute 26 is provided at a lower position on the front end side of the rail portion 21, and a work storage cassette 27 that receives the work W discharged from the cutting device 20 is provided on a lower end side of the chute 26.
And a work hand 28 for loading a work onto the spindle 31 of the NC lathe 30 and unloading the work W processed therein.

(Operation of Machine Tool) The operation of the machine tool 1 thus constructed will be described mainly with reference to FIG. Here, the long work W is held on the support table 151 of the work holding section 15.

First, from the state shown in FIG. 5A, when the actuator 833 operates and the operating shaft 832 moves forward in the direction of arrow G, the arm 831 rotates in the direction of arrow L, and the work W has been moved so far. The work receiving member 81, which is laid down at the lower position, switches from the postures shown in FIGS. 5A and 6A to the postures shown in FIGS. 5B and 6B.
During this operation, the work receiving member 81 lifts the work W from the support base 151, and the work horizontally moves under its own weight until it hits the protruding portion 814 on the guide portion 811 of the work receiving member 81. Here, the position where the work W has finished moving is set at the support roller 69 of the work delivery mechanism 60.
It corresponds to the position directly above the central part of.

Next, when the actuating shaft 832 is retracted in the direction of arrow H by the actuator 833 and the posture of the work receiving member 81 is returned to the flat posture shown in FIGS. 5 (a) and 6 (a), W automatically moves onto the support roller 69 of the work delivery mechanism 60.

Next, as shown in FIG. 2A, the sub-spindle 12 moves to a position corresponding to the set cutting length of the work W and stops there. Here, the chucks of both the main spindle 11 and the sub spindle 12 are in an open state. From this state, the rotation drive device 6
When 4 rotates the belt 63, the pushing member 62 pushes the rear end of the work W toward the main spindle 11 by a predetermined distance according to the movement amount of the belt 63, and the work W is
As shown in FIG. 2B, the tip surface thereof projects from the main spindle 11 until it reaches the stopper position in the sub spindle 12. Next, the monitoring device 16 confirms the presence or absence of the work W protruding from the main spindle 11 and also confirms the size of the work. Then, the chucks of the main spindle 11 and the sub spindle 12 are closed,
The main spindle 11 and the sub-spindle 12 hold the work W.

Here, the cutting length dimension (cutting position) of the work W is adjusted by the protruding length of the work W from the sub-spindle 12 or the horizontal moving mechanism 55.
It is defined by the entry position of 1.

In this state, the motor 5 of the cutting unit 50
3 operates, and the cutting blade 51 starts high-speed rotation in the direction of arrow D. After that, the elevating mechanism 54 operates to raise the cutting unit 50 at a predetermined speed, and as shown in FIG. 2C, the cutting blade 51 is advanced from the direction perpendicular to the work W to move the work W. Disconnect.

Here, in the cutting apparatus 10 of this example, the actuator 14 of the spindle drive mechanism 40 rotates the main spindle 11 and the sub-spindle 12 at the same speed at a low speed through the rack, the pinion, the rotation transmission shaft 143, etc., and cuts them. Before the work W is cut by the blade 51, as shown in FIG. 2D, the work W is rotated twice around the central axis L thereof. For this reason, the cutting blade 51 is always in the state of approaching from the edge of the cutting surface of the work W toward the center, so that no burr is generated on the cutting surface. Here, the number of rotations of the work W during cutting is set to two rotations in consideration of cutting processing efficiency within a range in which uncut uncut surfaces can be prevented.

After the work W is cut, the actuators 22 and 24 are actuated, and as shown in FIG.
The work chuck 25 receives the cut work W from the sub spindle 12 and then, as shown in FIG.
The work W is moved up and conveyed to the NC lathe 30. After that, the operations shown in FIGS. 2A to 2F are repeated.

(Effects of the Embodiment) As described above, in the machine tool 1 of the present embodiment, the cutting device 10 rotates the work W at a low speed during the cutting of the work W, so that the cutting blade 51 cuts the surface of the work W. Enter in the direction from the edge to the center.
Therefore, since burrs do not occur on the cut surface, it is not necessary to perform a deburring step after cutting the work W, and lathe processing can be performed as it is. Further, since the cutting of the work W and the lathe processing can be continuously performed,
By connecting the cutting device 10 and the NC lathe 30 to each other, it is possible to configure the machine tool 1 suitable for lathe-cutting a long work W cut out.

Further, since the work W rotates, the cutting blade 5
In the case of No. 1, it is necessary to enter only a depth substantially corresponding to the radius of the work W, so that the time required for the cutoff of the work W can be shortened. Further, even if the cutting blade 51 enters at an angle deviated from the direction perpendicular to the central axis L of the work W, the work W
The rotation of the cutting blade 51 makes it possible to obtain a cutting surface that is substantially the same as when the cutting blade 51 entered the work W at a right angle. Further, since the cutting surface is at a right angle, the thickness of the cutting blade 51 can be reduced to about 2 mm, and the yield can be improved.

The work W that can be cut by the cutting device 1 of this embodiment includes, in addition to the round bar, a square bar and various deformed members, and the shape thereof is not limited. Also, the cutting blade 5
The type 1 is not limited to the circular saw, but a band saw or the like can be used.

[0038]

As described above, in the cutting device and the machine tool according to the present invention, when the cutting blade is cut from the work at a right angle to cut the work, the work rotating mechanism moves the work around its axis. It is characterized by rotating at low speed. Therefore, the cutting blade always enters from the edge of the cutting surface of the work toward the center. Therefore, according to the present invention, since burr does not occur on the cut surface, the work after cutting can be directly subjected to lathe processing or the like.
In addition, since the cutting and lathe processing of the work can be performed continuously, a cutting machine and an NC lathe are connected to realize a machine tool suitable for lathing a long work cut. can do.

Further, since the cutting blade only has to enter a depth substantially corresponding to the radius of the work, the time required for cutoff can be shortened. Further, even if the cutting blade enters the work at an angle deviating from the direction perpendicular to the work, the rotation of the work causes the cutting blade to form a cutting surface substantially similar to that when entering the work at a right angle. Obtainable.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a main configuration of a machine tool including a work cutting device according to an embodiment of the present invention.

2 (a) to (f) are explanatory views when a work is cut using the work cutting device of the machine tool shown in FIG.

3 is a perspective view showing a configuration of a support roller of a work feeding mechanism and a height adjusting mechanism thereof provided in the work cutting device of the machine tool shown in FIG.

FIG. 4A is a side view of a support roller and a height adjusting mechanism thereof in a state where a thick work is set in the work feeding mechanism provided in the work cutting device of the machine tool shown in FIG. FIG. 3B is a side view of the support roller and a height adjusting mechanism thereof in a state where a thin work is set on the support roller.

5A is a side view of the work supply device of the machine tool shown in FIG. 1 in a standby state, and FIG. 5B is a state in which the work supply device is in an operating state and supplies the suspended work to the work delivery mechanism. It is a side view which shows a state.

6A is a perspective view of a work receiving member in a standby state of the work supply device of the machine tool shown in FIG. 1, and FIG.
FIG. 6 is a perspective view of a work receiving member showing a state in which the work is in an operating state and a pending work is supplied to the work delivery mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Machine tool 10 ... Cutting device 11 ... Main spindle 12 ... Sub spindle 13, 14, 22, 24, 833 ... Actuator 15 ... Work holding part 20 ... Work transfer Mechanism 30 ... NC lathe 40 ... Spindle drive mechanism 51 ... Cutting blade 60 ... Work feeding mechanism 66 ... Work supporting member 69 ... Support roller 70 ... Height position adjusting mechanism 71・ ・ ・ Base 74 ・ ・ ・ Base position adjusting mechanism 80 ・ ・ ・ Work supply mechanism 81 ・ ・ ・ Work receiving member 83 ・ ・ ・ Posture switching mechanism (work receiving member drive mechanism) 711 ・ ・ ・ Tapered surface 811 ・ ・ Guidance Department

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsunori Shimizu 1000 Akiwa, Ueda, Nagano Prefecture Miyano Co., Ltd. (72) Inventor Seiichi Ogihara 1000 Akiha, Ueda, Nagano Prefecture Miyano Co., Ltd. (72) ) Inventor Toru Nishikawa 7-8 Motomachi Shimizu, Toyama City, Toyama Prefecture Crete Co., Ltd.

Claims (6)

[Claims] 1. A work holding means capable of holding a long work, and a work held by the work holding means is inserted into the work while rotating or reciprocating from a direction perpendicular to an axis thereof to cut the work. A cutting device, comprising: a cutting blade; and a work rotating means for rotating the work held by the work holding means at a low speed around its axis when cutting the work. 2. The work holding means according to claim 1, wherein the work holding means holds the work on a first spindle to which a long work before cutting is supplied and on a side opposite to the spindle sandwiching the work cutting position. And a second spindle to
The cutting device, wherein the work rotating mechanism is a spindle drive mechanism that drives the first and second spindles to rotate at a low speed while synchronizing them. 3. The work feeding mechanism according to claim 2, further comprising a work feeding mechanism that feeds a long work before cutting from the back surface side of the first spindle and feeds it toward the second spindle. A cutting device, comprising: a work supporting member that supports a work to be sent out; and a height position adjusting mechanism that adjusts a height position of the work supporting member using a tapered surface. 4. The work supporting member according to claim 3, wherein a plurality of the work supporting members are arranged in the work feeding direction, and the height position adjusting mechanism has a tapered surface inclined in the work feeding direction. A plurality of bases for supporting the lower side of the base and a base position adjusting mechanism for adjusting the support position of the work supporting member on the tapered surface by moving the bases in the feed direction of the work. And a cutting device. 5. The work holding section for holding a work to be mounted next to a position lateral to the work feeding means, and the work for passing the work held therein to the work feeding means according to claim 3 or 4. And a work receiving unit having a guide unit for moving the work in a horizontal direction by its own weight from a position where the work is received in the work holding unit to a position directly above the work sending unit. Member and a state in which the guide portion of the work receiving member is retracted to a position below the work holding portion, and from this retracted state, the guide portion of the work receiving member is moved to a position where a work can be received in the work holding portion. A cutting device, comprising: a work receiving member drive mechanism for switching to a state where the work is made to appear. 6. A cutting device as defined in any one of claims 1 to 5, a work transfer means for discharging the work cut by this cutting device, and a work discharged by this work transfer means. A machine tool having an NC lathe for lathe processing.