JP2000271682A - Work movement positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the deflection of a work holding part, to cope with speeding up with a good weight balance, a low center of gravity, light weight and to improve precision with high toughness. SOLUTION: A plurality of work clamp main bodies 35 are integrated in the recessed part 21A of a carriage 21 arranged on a carriage base 15, upper/ lower clamp jaws 37, 41 constituting the work clamp main body 35 are arranged so that they are freely opened/closed, and a drive device 53 to avoid the upper/ lower clamp jaws 37, 41 are arranged. Since the work clamp main body 35 is integrated in the carriage 21 so that it can avoid the jaws 37, 41 the device has a good precision with high toughness and a low center of gravity and can cope with speeding up and improves the yield.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work movement positioning device for gripping one side edge of a work.

[0002]

2. Description of the Related Art Conventionally, for example, a work movement positioning device has been employed as a device for positioning a work at a processing position of a plate material processing machine.

[0003] This work movement positioning device generally has a configuration as shown in FIG. That is, a plurality of work clamp devices 203 are provided in the work movement positioning device 201. More specifically, the work movement positioning device 201 is provided with a carriage base 205
Are provided to extend in the X-axis direction (the direction orthogonal to the drawing in FIG. 18), and are provided in the Y-axis direction (the left-right direction in FIG. 18).
It is provided movably to. This College Base 2
A carriage 209 is mounted on the carriage 05 via a linear guide 207 so as to be movable in the X-axis direction.

The carriage base 205 is provided with a ball screw 213 connected to an X-axis drive motor 211, and the carriage 209 is screwed to the ball screw 213 via a nut member (not shown). Also,
The clamp body 21 constituting the work clamping device 203 through the dovetail groove 215 formed in the carriage 209
7 are engaged, and the clamp body 217 is mounted movably in the X-axis direction.

More specifically, the clamp body 217 has a pressing member 2 for pressing the surface of the dovetail groove 215 in order to fix the clamp body 217 to the dovetail groove 215.
19, and a handle 223 provided with a screw rod 221 for pressing or releasing the pressing member 219. The clamp body 217 is provided with a fixed lower clamp jaw 225 and an upper clamp jaw 229 that is rotatable above the lower clamp jaw 225 with a shaft 227 as a pivot. Is rotated by a cylinder (not shown) built in the clamp body 217.

With the above structure, one side edge of the work W is clamped or unclamped in cooperation with the lower clamp jaw 225 by the rotation of the upper clamp jaw 229 by the operation of the cylinder. And the clamped work W
By moving the carriage base 205 in the Y-axis direction and the carriage 209 in the X-axis direction, the workpiece W can be positioned at a predetermined processing position.

Further, as shown in FIGS. 19 and 20, there is known a configuration in which the lower clamp jaw 225 and the upper clamp jaw 229 are avoided.

[0008] That is, FIG.
No. 0, lower clamp jaw 2
As a configuration for avoiding the upper clamp jaw 25 and the upper clamp jaw 229, the upper and lower clamp jaws 225, 229 are rotated via the arm 233 by the operation of the cylinder 231 provided on the clamp body 217 as shown by the arrow A in FIG. This is a configuration to avoid.

FIG. 20 shows a configuration in which the lower clamp jaw 225 and the upper clamp jaw 229 are avoided by connecting the upper and lower clamp jaws 225 and 229 via the connecting member 237 by the operation of the cylinder 235 as indicated by arrows B in FIG. As shown in FIG.

[0010]

In the above-described conventional work clamp apparatus 201, the dovetail groove 215 for mounting the clamp body 217 from the position where the work W is gripped.
18 (shown in FIG. 18), the moment force due to the inertial force of the work W increases. For this reason, the upper and lower clamp jaws 225, 229
This causes a problem that the deflection of the workpiece W occurs, which leads to a positioning error of the work W.

Further, since the clamp body 217 is attached to the front surface of the carriage 209, there is a concentrated load at a position far from the ball screw 213, and the weight balance of the load is poor, which is disadvantageous for speeding up. Further, if the number of the clamp bodies 217 is increased in order to cope with a large work size, the clamp weight becomes a load in addition to the work weight, so that the restriction on the feed speed is increased.

Still further, the possibility of forgetting to lock the handle 223 to be clamped, the possibility of clamping displacement due to loosening,
Depending on the play of the dovetail groove 215 and the processing accuracy, the clamp body 21
There was a problem that the mounting accuracy of No. 7 was affected. Also,
Since four or more avoidance clamps are required, the moving weight is large and affects positioning control and the like.

SUMMARY OF THE INVENTION An object of the present invention is to provide a work movement positioning device which reduces the deflection of a work holding portion, has a good weight balance, has a low center of gravity, is lightweight, can cope with a high speed, and has high rigidity and improved accuracy. It is in.

[0014]

According to a first aspect of the present invention, there is provided a workpiece moving / positioning apparatus provided with a carriage which is movable in a longitudinal direction of a carriage base, and a carriage which is movable in a longitudinal direction of the carriage. A plurality of work clamp bodies are provided in the carriage at appropriate intervals, and upper and lower clamp jaws are provided at the lower part of the work clamp body so as to be openable and closable, and the upper and lower clamp jaws are arranged in the longitudinal direction of the carriage base. The clamp body is provided with a driving device for moving in a direction perpendicular to the clamp body.

Therefore, since the carriage has a structure in which the work clamp body is built in and the upper and lower clamp jaws are avoided, there is no need to move the work clamp body in accordance with the work size, and the carriage can cope with automatic operation.
Moving weight can be reduced and controllability is improved. Also, there is no forgetting to tighten the handle to be clamped, and the clamp body does not shift due to loosening, and rigidity and accuracy can be improved by reducing the number of mounting parts, thereby reducing costs.

According to a second aspect of the present invention, there is provided a workpiece moving and positioning apparatus according to the present invention, wherein a carriage is provided which is movable in the longitudinal direction of a carriage base, and a plurality of recesses are formed at appropriate intervals in the longitudinal direction on the front surface of the carriage. A linear guide rail extending in the vertical direction is provided on both left and right sides of each recess, and a work clamp body is provided on the linear guide rail via a linear nut that can move up and down. And a drive device for moving the lower clamp jaw in a direction perpendicular to the longitudinal direction of the carriage base.

Therefore, the work clamp body is built in the carriage, the upper and lower clamp jaws are avoided, and the upper and lower clamp jaws are slid in the vertical direction. The low center of gravity allows stable running. In addition, the number of clamps can be increased by minimizing weight increase, rigidity can be increased, and high precision processing can be performed. By installing a large number of clamps, it is possible to respond to workpieces of all sizes and automatically operate together with avoidance clamps It is effective for

Further, there is no misalignment of the clamp body due to forgetting or loosening of the handle to be clamped, and the avoidance clamp improves material yield and reduces cost.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

First, the overall configuration of, for example, a turret punch press and ancillary equipment as a plate processing machine will be schematically described.

Referring to FIG. 7, the turret punch press 1 is provided with an upper turret 5 inside a portal frame 3 and a lower turret (not shown) at a lower portion opposed to the upper turret 5 so as to be synchronized. And is rotatably mounted on the portal frame 3. A number of upper dies P are mounted on the upper turret 5, and a number of lower dies (not shown) are mounted on the lower turret in opposition to the upper dies P.

The upper mold P is hit by the vertical movement of a ram (not shown) provided on the upper part of the portal frame 3, and the work W is punched in cooperation with the upper and lower molds. Reference numeral 7 denotes a punching position.

A fixed table 9 is provided in the portal frame 3 adjacent to the lower turret, and movable tables 11 are provided on both sides of the fixed table 9. A carriage base 15 is provided integrally with the movable table 11 so as to straddle the fixed table 9 and constitute a part of the work movement positioning device 13. The carriage base 15 is provided so as to extend in the X-axis direction (vertical direction in FIG. 7), and is screwed to a ball screw 17 extending in the Y-axis direction (right and left direction in FIG. 7). Is connected to a Y-axis drive motor 19.

A carriage 21 is mounted on the carriage base 15 so as to be movable in the X-axis direction. That is, the carriage base 15 is provided with a ball screw 23 extending in the X-axis direction. The carriage 21 is screwed to the ball screw 23 via a nut member (not shown). The X-axis drive motor 25 is connected. The carriage 21 is provided with a plurality of work clamp devices 27 which can hold and open one side edge of the plate-shaped work W.

With the above configuration, the X-axis drive motor 25 is driven to rotate the ball screw 23 to move the carriage 21 in the X-axis direction, and the Y-axis drive motor 19 is driven to rotate the ball screw 17 to rotate the carriage. The base 15 is moved in the Y-axis direction, the work W gripped by the work clamp device 27 is moved to the punching processing position 7 and positioned, and the desired movement is achieved by the cooperation of the upper die and the lower die by the vertical movement of the ram. Punching is performed.

Next, the work movement positioning device 13 which is a main part of the present invention will be described in more detail.

First, referring to FIGS. 5 and 6, as a general arrangement of the work movement positioning device 13, the carriage 21 is mounted on the carriage base 15 via the first linear guide 29, and the X-axis drive is performed. The carriage 21 is provided movably in the X-axis direction (left-right direction in FIG. 5) by a motor 25 via a ball screw 23. The carriage 21 is usually provided with four or more work clamping devices 27 so as to correspond to the minimum work size.

Next, the work clamp device 2 built in the carriage 21 constituting the work movement positioning device 13
7 will be described in detail.

Referring to FIGS. 1, 2 and 3, the work clamping device 27 has a carriage 21 provided on a carriage base 15 via a first linear guide 29, and extends in the longitudinal direction on the front surface of the carriage 21. A plurality of recesses 21A are provided at appropriate intervals, and a plurality of work clamp devices 27 are provided in the recesses 21A. More specifically, as shown in FIG.
The clamp support member 33 is provided movably in the Y-axis direction (the left-right direction in FIG. 1 and the direction orthogonal to the drawing in FIG. 2).

Referring to FIGS. 1 and 2, a lower clamp jaw 37 constituting a work clamp body 35 and a rotating shaft 39 provided on the lower clamp jaw 37 are mounted inside the clamp support member 33. A rotatable upper clamp jaw 41 is provided. A U-shaped hook 43 is provided on the upper surface of the upper clamp jaw 41. A locking pin 49 provided at the tip of a piston rod 47 of a clamping fluid pressure cylinder 45 built in the carriage 21 and the hook 43 are provided. Are locked or unlocked.

With the above arrangement, when the clamping fluid cylinder 45 is operated, the upper clamp jaw 41 rotates about the rotation shaft 39 as a pivot, and the lower clamp jaw 3 rotates.
7, one side edge of the work W is clamped and unclamped.

Next, referring also to FIG. 3, the rear end (right side in FIG. 1, rear side in FIG. 2, front side in FIG. 3) of the clamp supporting member 33 supporting the work clamp body 35 is connected. The member 51 is provided integrally. The carriage 21 is provided with, for example, a fluid pressure cylinder 55 for avoiding clamping as a driving device 53, and a distal end of a piston rod 57 of the fluid pressure cylinder 55 for avoiding clamping is connected to the connecting member 51.

With the above configuration, when the clamp-avoidance hydraulic cylinder 55 is operated to project the piston rod 57, the clamp support member 33 provided with the work clamp body 35 is retracted and positioned at the avoidance position. At this time, as shown in FIG. 4, the relationship between the hook 43 provided on the upper clamp jaw 41 and the locking pin 49 provided on the clamping fluid pressure cylinder 45 is U-shaped. Therefore, the locking pin 49 is separated from the hook 43 and is in a free state.

Referring to FIG. 2 again, the carriage 21 is provided with a plurality of shot pins 59, and the lower end locking portions 59 A of the shot pins 59 are engaged with the engagement holes 61 formed in the clamp support member 33. In the normal state, the work clamp body 35 is positioned and fixed by the shot pin 59 in the engaged state. The operation of engaging or disengaging the shot pin 59 with the engagement hole 61 provided in the clamp support member 33 may be performed manually or by using a driving member.

As described above, the recess 2 of the carriage 21
The clamping fluid cylinder 45 and the clamping fluid cylinder 55 are built in 1A, and the work clamp body 35 guided by the second linear guide 31 can be slid by the clamping fluid cylinder 55 to avoid the workpiece.

Therefore, it is not necessary to move the work clamping device 27 in accordance with the size of the work, and it is possible to cope with the automatic operation, reduce the moving weight, and improve the controllability.
Further, since there is no handle to be clamped as compared with the conventional configuration, there is no clamping displacement due to forgetting or loosening, and the number of mounting parts is reduced, rigidity and accuracy are improved, and the number of parts is small, so that cost can be reduced.

FIGS. 8, 9 and 10 show a second embodiment of the work clamping device 27 constituting the work movement positioning device 13 of the present invention. The second embodiment is different from the driving device 53 described in the first embodiment in that the other components are the same. The description is omitted.

That is, the driving device 53 is connected to the carriage 2
The clamp support member 65 provided with the work clamp body 35 is moved in the Y-axis direction (the direction perpendicular to the drawing in FIG. 9 and the horizontal direction in FIG. 10) via the plurality of third linear guides 63 provided in the one concave portion 21A. It is provided movably. More specifically, a clamp-avoidance drive motor 67 is built in the carriage 21 in a vertical state, and a pinion 71 is attached to a lower end of an output shaft 69 of the clamp-avoidance drive motor 67. The pinion 71 is connected to the clamp support member. 65 is engaged with a rack 73 provided on one side. The racks 73 may be provided on both sides of the clamp support member 65, and may be engaged with each other via the pinions 71 by the clamp avoidance drive motors 67 provided on both sides.

With the above configuration, when the driving motor 67 for avoiding clamping is driven, the pinion 71 rotates, and the clamp supporting member 65 provided with the clamp body 35 is moved via the rack 73 in the Y-axis direction. 35
Can be moved to the avoidance position and positioned.

With the above configuration, the effect can be exactly the same as the effect described in the first embodiment.

FIGS. 11 to 14 show a third embodiment of the work movement positioning device 13 of the present invention. The same members as those in the first and second embodiments described above have the same reference numerals. And the description is omitted.

A carriage 21 is provided on the carriage base 15 via a first linear guide 29 so as to be movable in the X-axis direction (a direction perpendicular to the drawing in FIG. 11, and a vertical direction in FIG. 12). Linear guide bases 75 are provided on both left and right sides of 21A. A plurality of linear guide rails 77A constituting a fourth linear guide 77 extending in the vertical direction are provided on both left and right side surfaces of the linear guide base 75 at a plurality of locations. One clamp support member 79 is supported.

The work clamp body 3 is connected to the first clamp support member 79 via fifth linear guides 81 provided on both sides.
The second clamp supporting member 83 provided with the carriage 5 is movable in the Y-axis direction.
Output shaft 8 of rotary actuator 85 built in
7, a rack 91 is provided on the second clamp support member 83 so as to extend in the Y-axis direction.
Is engaged.

With the above configuration, the pinion 89 for driving the rotary actuator 85 is rotated, and the rack 91 meshed with the pinion 89 is moved in the Y-axis direction, whereby the work clamp body 35 is retracted to the avoidance position and can be positioned. .

The structure in which the upper clamp jaw 41 is rotated by the clamping fluid cylinder 45 provided in the carriage 21 is shown in FIGS. 13 and 14, and this structure is the same as in the first embodiment. Configuration.

That is, the locking pin 49 provided on the lower end of the piston rod 47 of the clamping fluid cylinder 45 provided on the carriage 21 engages or disengages with the U-shaped hook 43 provided on the upper part of the upper clamp jaw 41. It is provided freely.

With the above configuration, the work clamp body 35
Is in the avoidance position (the position indicated by the two-dot chain line in FIG. 13), the hook 43 is disengaged from the locking pin 49 of the clamping fluid cylinder 45, and when the hook 43 advances to the home position, the locking pin 49 and the hook 43 Engage.

When the work clamp body 35 is in the normal state, the work clamp body 35 is positioned and fixed by inserting the shot pin 59 (see FIG. 12).

According to the configuration described above, the fourth linear guide 77 that slides up and down at a low position near the work clamp body 35 that holds the work W reduces the moment force, improves the lateral rigidity, and holds the work. The deflection of the part is reduced, and the center of gravity can be lowered. Also, since the work clamp device 27 is built in the carriage 21,
The weight can be greatly reduced, the weight balance improves, and the weight is reduced.
It has high rigidity and can respond to high speed. Furthermore,
Since the configuration can avoid, the material yield is good, and by installing a large number of clamps, it is possible to cope with works of any size, and it is effective for automatic operation together with the avoidance configuration.

FIGS. 15 and 16 show a fourth embodiment of the workpiece movement positioning device 13 of the present invention. The only difference from the third embodiment is the configuration of the driving device 53. Since the other components are the same, the same reference numerals are given and the description is omitted.

That is, the fourth linear guide base 75
A first clamp support member 79 is provided movably in the vertical direction via a linear guide 77, and a second clamp support member 83 is provided on the first clamp support member 79 via a fifth linear guide 81 in the Y-axis direction (see FIG. 15 at a direction perpendicular to the drawing, and in FIG.

The driving device 53 for moving the work clamp body 35 provided on the second clamp support member 83 in the Y-axis direction is a rodless cylinder 93. In this embodiment, the driving device 53 is provided on both sides. good.

With the above configuration, the effect can be the same as the effect of the third embodiment.

FIG. 17 shows a fifth embodiment of the workpiece movement positioning device 13 of the present invention. The only difference from the third embodiment is the configuration of the driving device 53. Are the same, the same reference numerals are given, and the description is omitted.

That is, the structure of the driving device 53 is such that the magnet 97 of the linear motor 95 is provided on the first clamp support member 79 side and the coil 99 is provided on the second clamp support member 83 provided with the work clamp body 35 to avoid the problem. Power source. The mounting of the magnet 97 and the coil 99 may be reversed.

Therefore, the effect can be the same as the effect of the third embodiment.

The present invention is not limited to the above-described embodiments, but can be embodied in other modes by making appropriate changes. For example,
It is also possible to change the rotary actuator 85 used in the third embodiment to a motor.

[0058]

As will be understood from the above description of the embodiments of the present invention, according to the first aspect of the present invention, the work clamp body is built in the carriage and the upper and lower clamp jaws are avoided. Therefore, the operation of moving the work clamp body in accordance with the work size is not required, and it is possible to cope with the automatic operation, reduce the moving weight and improve the controllability. In addition, there is no forgetting to tighten the handle to be clamped or the displacement of the clamp body due to loosening, and the rigidity and accuracy can be improved by reducing the number of mounting portions, and the cost can be reduced.

According to the present invention according to claim 2,
The work clamp body is built in the carriage, and the upper and lower clamp jaws are avoided, and the upper and lower clamp jaws are slid in the vertical direction. Stable running becomes possible. In addition, the number of clamps can be increased by minimizing weight increase, rigidity can be increased, and high precision processing can be performed. By installing a large number of clamps, it is possible to respond to workpieces of all sizes and automatically operate together with avoidance clamps It is effective for

Further, there is no displacement of the clamp body due to forgetting to tighten or loosening of the handle to be clamped, and by using the avoidance clamp, the material yield is improved and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a work movement positioning device according to a first embodiment of the present invention, taken along line II in FIG. 5;

FIG. 2 is a front view including a partial cross section viewed from the left side in FIG.

FIG. 3 is a front view of a part viewed from an arrow III in FIG. 1;

FIG. 4 is an operation explanatory view.

FIG. 5 is a front view of a carriage constituting the work movement positioning device of the present invention.

FIG. 6 is a side view of FIG.

FIG. 7 is an explanatory plan view of the overall configuration of a turret punch press and ancillary equipment showing an embodiment of the present invention.

FIG. 8 shows a second embodiment of the present invention and is a front view of a carriage provided with a work clamping device.

FIG. 9 is an enlarged front view including a partial cross section of the work clamping device taken along the line IX in FIG. 8;

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 shows a third embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view of a carriage provided with a work clamping device along a line XI-XI in FIG.

12 is a bottom view as seen from below the carriage provided with the work clamping device in FIG. 11;

FIG. 13 is an explanatory side view showing the connection between the clamping fluid cylinder and the upper jaw.

14 is an explanatory front view as viewed from the left side in FIG. 13;

FIG. 15 is a front view of a work clamping device according to a fourth embodiment of the present invention.

FIG. 16 is a sectional view taken along line XVI-XVI in FIG.

FIG. 17 is a side view of a work clamping device according to a fifth embodiment of the present invention.

FIG. 18 shows a conventional example, and is a side view of a carriage and a work clamping device provided on a carriage base.

FIG. 19 is an explanatory plan view showing a conventional example, in which a driving device performs an avoidance operation.

FIG. 20 is an explanatory plan view of another embodiment of a driving device that performs a avoidance operation, showing a conventional example.

[Explanation of symbols]

 Reference Signs List 13 work moving positioning device 15 carriage base 21 carriage 21A recess 35 work clamp body 37 lower clamp jaw 41 upper clamp jaw 53 drive device 65 clamp support member 77 fourth linear guide 77A linear guide rail 77B linear nut 79 first clamp support member W Work

Claims (2)

[Claims] 1. A carriage which is movable in a longitudinal direction of a carriage base, a plurality of work clamp bodies are provided in the carriage at appropriate intervals in a longitudinal direction of the carriage, and a plurality of work clamp bodies are provided in a lower portion of the work clamp body. The upper and lower clamp jaws are provided so that they can be opened and closed.
A workpiece movement positioning device, wherein a drive device for moving a lower clamp jaw in a direction perpendicular to a longitudinal direction of the carriage base is provided on the clamp body. 2. A carriage which is movable in a longitudinal direction of a carriage base, a plurality of recesses are formed at appropriate intervals in a longitudinal direction on a front surface of the carriage, and a plurality of recesses are formed on both right and left sides of each recess in a vertical direction. A work clamp body is provided on the linear guide rail via a vertically movable linear nut, and a lower clamp jaw is provided on the work clamp body so as to be freely opened and closed. A work movement positioning device, further comprising a driving device for moving the carriage base in a direction perpendicular to a longitudinal direction of the carriage base.