JPH1015618A - Back gage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a back gage device for improving the accuracy of dimensions of a flange by making the device so that unbalanced load is not applied to the lower table of a bending machine, also stabilizing posts by always fixing the route on which bumping/pressing force is transmitted and exactly executing the positioning of a work. SOLUTION: The back gage device is arranged at the rear of the bending machine and composed of Z-axis guide parts A, supporters B and supporter driving parts C. At least two Z-axis guide parts are fixed to respective side plates 3 which are errected on both sides of the lower table 2. The supporters have bumping parts 5 through a stretcher 4 and the posts 6, are loosely fit to the Z-axis guide parts and supported with them and movable in the Z-axis direction. The supporter driving parts are provided between the supporters and the lower table and, by moving only the supporters to the lower table in the Z-axis direction, the height position of the bumping parts are determined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a back gauge device,
In particular, it relates to a back gauge device used in a bending machine.

[0002]

2. Description of the Related Art Conventionally, as a bending machine as an example of a metal working machine, for example, there is a bending machine of a press brake type.

In this type of bending machine, one of an upper table on which a punch is mounted and a lower table on which a die is mounted are moved up and down, and the work is bent by cooperation of the punch and the die. Has become.

It is well known that in this bending machine, a back gauge device is provided at a rear portion thereof, and positioning of a work is performed prior to bending.

As shown in FIG. 5A, the conventional back gauge device includes two supporters 104 extending from the lower table 100 in the Y-axis direction, a post 107 provided on each supporter 104, and two posts. The stretch 106 includes a stretch 106 extending in the X-axis direction between the stretches 107, and an abutting portion 105 provided on the stretch 106.

With this configuration, the abutting portion 105 is moved on the stretch 106 in the X-axis direction, and
6 is moved on the post 107 in the Z-axis direction, and further, the post 107 is moved on the supporter 104 in the Y-axis direction, thereby performing setup.

After the setup is performed in this manner, the end of the work W is abutted against the abutting portion 105, and the bent position b of the work W is positioned at the processing position c.

In this state, if the work W is bent in cooperation with the punch 102 and the die 101, a flange dimension H as shown in FIG. 5B is obtained.

[0009]

However, the above conventional technique (FIG. 5) has the following problems. As is clear from FIG. 5A, conventionally, each supporter 104 is joined to the lower table 2 by welding or the like, but the joining portion 103 is only one.

That is, the conventional supporter 104 is a so-called cantilever supporter.

In addition, the supporter 104 includes a post 10
7 and a post 10 at the rear.
7 is provided in the Y-axis direction.
The post 107 is provided with a stretch 106 to which the butting portion 105 is attached.

Therefore, when viewed from the lower table 100,
An uneven load is applied, and the lower table 100 may lean backward or fall backward.

Further, in the case of the above setup, the lower table 2
With the supporter 104 stopped, only the butting portion 5 moves in the Z-axis direction.

Therefore, the force acting when the workpiece W is abutted against the abutting portion 105, that is, the abutting portion 105 → stretch 106, which is the path along which the abutting pressing force is transmitted.
→ Post 107 → Supporter 104 → Lower table 100
Is longer as the position of the butting portion 105 is higher.

Therefore, as the position of the abutting portion 5 is higher, the post 107 to which the abutting portion 105 is attached via the stretch 106 becomes unstable, and the post 107 is moved backward by the abutting pressing force. May lean or fall backwards.

As a result, the bending position b of the work W (FIG. 5)
It becomes difficult to accurately position (A)) at the processing position c, and the accuracy of the flange dimension H (FIG. 5B) obtained by performing the bending process is reduced.

An object of the present invention is to prevent an eccentric load from being applied to a lower table of a bending machine, stabilize a post by always keeping a path for abutting and pressing force transmitted, and accurately position a workpiece. By doing
It is an object of the present invention to provide a back gauge device that improves the accuracy of a flange dimension.

[0018]

According to the present invention, one of an upper table on which a punch is mounted and a lower table on which a die is mounted are moved in the Z-axis direction, and the punch and the die cooperate to bend the workpiece. In a back gauge device of a bending machine for performing processing, (1) at least two Z-axis guide portions A fixed to side plates 3 erected on both sides of the lower table 2; A supporter B having an abutting portion 5 via a post 6, is loosely fitted to and supported by the Z-axis guide portion A, and is movable in the Z-axis direction.
And (3) a supporter drive provided between the supporter B and the lower table 2 to determine the height position of the abutting portion 5 by moving only the supporter B relative to the lower table 2 in the Z-axis direction. A technical means of a back gauge device characterized by comprising a part C is provided.

Therefore, according to the configuration of the present invention, each supporter B is supported by at least two Z-axis guides A, and the entire back gauge device is supported by at least four Z-axis guides A. So lower table 2
And the lower table 2 does not lean backward or fall down.

Further, since the butting portion 5 moves in the Z-axis direction simultaneously with the movement of the supporter B in the Z-axis direction, the path through which the butting pressing force is transmitted is independent of the height of the butting portion 5. The post 6 is always constant, so that even if the position of the abutting portion 5 is increased, the post 6 is stabilized and does not lean backward or fall down.

For this reason, the present invention acts to provide a back gauge device that improves the accuracy of flange dimensions by accurately positioning a work.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings according to embodiments. FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 1 is a perspective view showing a case where the back gauge device according to the present invention is applied to a bending machine, as viewed from the rear of the bending machine.

The bending machine has a lower table 2 arranged parallel to the X-axis. Side plates 3 are provided on both sides of the lower table 2 and an upper table 1 is provided immediately above the lower table 2, respectively. As described above, the work W is bent by the cooperation of the punch (not shown) mounted on the upper table 1 and the die (not shown) mounted on the lower table 2.

Two gearboxes 14 project rearward from the lower table 2, and a driven shaft 13 constituting a supporter driving section C described later extends between the two gearboxes 14. .

The details of the gearbox 14 are shown in FIG.

In FIG. 2, the right end of the driven shaft 13, the left end of the drive shaft 13 A coaxial with the driven shaft 13, the driven shaft 13 and the drive shaft 1 are provided in the right gear box 14.
The whole driven shaft 13B arranged at a right angle to 3A is housed respectively.

A disk-shaped handle 11 is fixed to the right end of the drive shaft 13A.
The supporter driving section C can be driven as described later by rotating the handle 11 while holding the handle 12 in the hand.

By attaching a motor (not shown) in addition to the handle 11, the connection of the drive shaft 13A to the right end can be switched, and the supporter drive C can be operated both manually and automatically. Can be.

A bevel gear 13A1 is provided at the left end of the drive shaft 13A, and a bevel gear 13A is provided at the tip of the driven shaft 13B.
B1 is a bevel gear 131 at the right end of the driven shaft 13,
These bevel gears are provided and mesh with each other as shown.

As a result, a rotation transmission mechanism is formed, and the rotation of the drive shaft 13A is transmitted to the driven shaft 13B and the driven shaft 13B.
B is transmitted to the driven shaft 13 via B.

Further, a bevel gear 13B2 is provided at the other end of the driven shaft 13B.
B2 meshes with a bevel gear 152 provided at the lower end of the ball screw 15 (FIG. 2).

The ball screw 15 is connected to the gear box 14
, And extends upward (FIG. 1) into the main body 7 of the supporter B, which will be described later, and receives the nut receiver 1 in the main body 7.
It is screwed to a nut 16 fixed to 7 (FIG. 2).

On the other hand, the left end of the driven shaft 13 and the entire driven shaft 13B arranged at right angles to the driven shaft 13 are accommodated in the left gear box 14, respectively.

A bevel gear 131 is provided at the left end of the driven shaft 13.
However, a bevel gear 13B1 is provided at the tip of the driven shaft 13B,
Provided, and these bevel gears are meshed as shown, whereby the right gearbox 1
4, a rotation transmission mechanism is configured to transmit the rotation of the driven shaft 13 to the driven shaft 13B.

Further, a bevel gear 13B2 provided at the other end of the driven shaft 13B meshes with a bevel gear 152 provided at the lower end of the ball screw 15 (FIG. 2).

The ball screw 15 protrudes outward from the gear box 14 and extends upward (FIG. 1), as in the case of the right ball screw 15, and enters the main body 7 of the supporter B. (See FIG. 2).

With this configuration, the rotation of the drive shaft 13A is
The power is transmitted to a driven shaft 13B in the right gear box 14 to rotate the right ball screw 15 and the driven shaft 13B is rotated.
The rotation of the driven shaft 13 is transmitted to the driven shaft 13B in the left gear box 14 to rotate the left ball screw 15 through B.

When the ball screws 15 on both sides rotate, the nuts 16 built in each body 7 move in the Z-axis direction.
Can be moved in the Z-axis direction.

That is, the drive shaft 13A and the driven shafts 13 and 13B
, A ball screw 15 coupled to the rotation transmission mechanism, and a nut 1 screwed to the ball screw 15
6, the supporter driving unit C is configured.

As shown in the figure, the supporter driving section C is composed of a ball screw 15 and a gear box 14 in which a rotation transmitting mechanism connected to the ball screw 15 is formed. And the supporter B.

The main body 7 containing the nut 16 of the supporter driving section C extends in the Y-axis direction (FIG. 1), and has a rail 8 and a ball screw 9 inside, and a slider 7 outside.
A constitutes a supporter B which is attached and supports the abutting portion 5 described later.

Slider 7A outside supporter body 7
Are loosely fitted to, for example, two rails A extending in the Z-axis direction, and the rails A are fixed to the side plates 3.

Therefore, by operating the supporter driving unit C described above, the entire supporter B moves in the Z-axis direction along the rail A while being supported by the rail A.

When the lower table 2 moves, the supporter B moves along the rail A in synchronization with the lower table 2.

That is, the rail A fixed to the side plate 3 constitutes the Z-axis guide portion A of the supporter B.

A stretch 4 extending in the X-axis direction is arranged between both supporters B, and a striking portion 5 is mounted on the stretch 4 so as to be movable in the X-axis direction.

The stretch 4 is fixed to a post 6, and a slider 6A is fixed below the post 6, and is loosely fitted to the rail 8 of the main body 7, and a nut (not shown) is built in. And is screwed into the ball screw 9 of the main body 7.

Accordingly, a motor (not shown) as a driving source
When the ball screw 9 is rotated, the post 6, and hence the stretch 4, moves along the rail 8 between the supporters B in the Y-axis direction.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 3 shows that the supporter driving section C of the back gauge device includes a driving pulley 21 and driven pulleys 22, 23, 2
4 and the wire 20 wound around them.

The drive pulley 21 is rotatably attached to the lower table 2. Both drive pulleys 21 are connected by a rotating shaft 25, and a motor M is connected to one drive pulley 21.

Thus, when the motor M is rotated, both the driving pulleys 21 are also rotated to drive the wires 20 on both sides, so that only the supporter B can be moved with respect to the lower table 2 in the Z-axis direction.

Further, similarly to the supporter driving section C shown in FIG. 1, by attaching a handle (not shown), the connection to the driving pulley 21 can be switched. It can be operated both manually and automatically.

A driven pulley 22 is provided directly below the driving pulley 21, a driven pulley 23 is provided adjacent to the driven pulley 22 in the Y-axis direction, and a driven pulley 24 is provided above the driven pulley 23. And each driven pulley 22, 2
3 and 24 are side plates 3 via shafts 22A, 23A and 24A.
It is fixed to.

The wire 20 has one end fixed to the driving pulley 21 (FIG. 3 (A)), and is wound around driven pulleys 22, 23 and 24, and the other end is connected as shown in the figure. , Is fixed to the upper part of the supporter main body 7.

Thus, the supporter drive section C connects the lower table 2 and the supporter B by the drive pulley 21 and the wire 20.

In the structure of the supporter driving section C, as shown in the left diagram of FIG. 3B, the driving pulley 21 is rotated with the lower table 2 stopped (arrow R1).

At this time, the driving pulley 21 and the driven pulley 2
2, 23 and 24 are all fixed pulleys, and their positions are fixed.

Therefore, if the drive pulley 21 to which one end of the wire 20 is fixed is rotated (arrow R1), the wire 2
0 moves by being guided by rotatable driven pulleys 22, 23, and 24, and can move only the supporter B to which the other end of the wire 20 is fixed along the Z-axis guide portion A (arrow). Z1).

When the lower table 2 moves, as shown in the right diagram of FIG. 3B, by operating the cylinder 30 to move the piston 31 up and down,
The lower table 2 moves in the Z-axis direction (arrow Z2).

At this time, if the rotation of the driving pulley 21 is stopped, it can be considered that one end of the wire 20 is fixed to the lower table 2 (the right figure in FIG. 3B). The driven pulleys 22, 23, 24 are constant pulleys.

Therefore, when the lower table 2 moves in the Z-axis direction, the wire 20 connecting the lower table 2 and the supporter B is also guided and moved by the rotatable driven pulleys 22, 23 and 24, and The supporter B to which the other end of 20 is fixed can be moved in the Z-axis direction simultaneously with the lower table 2 (arrow Z3).

That is, the supporter B can be synchronized with the lower table 2 and can be moved along the Z-axis guide A (arrows Z2, Z3 in FIG. 3B).

FIG. 4 is a diagram showing a third embodiment of the present invention. FIG. 4 shows a case where a back gauge device is constituted by a link mechanism D instead of the Z-axis guide section A of FIG.

That is, the link mechanisms D shown in FIG. 4 are respectively provided near both ends of the lower table 2 (see FIG. 4).
(A)), the central portions of the links 40 and 41 are crossed and connected by a pin 42.

Further, both ends of the link 40 are connected to pins (not shown) built in boxes 43 and 46 shown, and both ends of the link 41 are connected to pins (not shown) built in boxes 44 and 45. Connected.

The box 43 is connected via a reinforcing plate 47
The box 44 is directly installed on the floor. The box 43 is slidable on the reinforcing plate 47 by raising and lowering the supporter B.

The main body 7 of the supporter B is fixed on the box 45 via a reinforcing plate 48 and directly on the box 46. The box 45 is also slidable on the reinforcing plate 48 by raising and lowering the supporter B.

Further, in the back gauge device shown in FIG. 4A, the supporter driving section C is the same as that of FIG.
1 is different from FIG.

That is, the rotation transmitting mechanism of the supporter drive section C shown in FIG. 4 is obtained by removing the drive shaft 13A in FIG. 2 and instead directly connecting the motor M to the lower end of the right ball screw 15.

With this configuration, as shown in the left diagram of FIG. 4B, when the motor M is rotated with the lower table 2 stopped, the two ball screws are rotated in the same manner as the supporter driving section C of FIG. 15 rotates, and only the supporter B moves in the Z-axis direction (arrow Z4), and accordingly, the link mechanism D on which the supporter B is supported expands and contracts in the Z-axis direction (arrow Z5).

The lower table 2 and the supporter B are
It is connected to a gear box 14 via a ball screw 15.

Accordingly, when the lower table 2 moves, as shown in the right diagram of FIG. 4B, when the rotation of the motor M is stopped, the cylinder 30 is operated to move the piston 31 up and down. With the movement of the lower table 2 (arrow Z6), the supporter B also moves in synchronization with the Z-axis direction (arrow Z).
7) The link mechanism D on which the supporter B is supported
Also expands and contracts in the Z-axis direction at the same time (arrow Z8).

That is, the supporter B can be synchronized with the lower table 2 and moved while being supported by the link mechanism D (the right diagram in FIG. 4B, arrows Z6, Z7, Z8). In this respect, the difference between the Z-axis guide portion A shown in FIGS. 1 and 3 and the link mechanism D shown in FIG. 4 is that the supporter B moves independently or moves synchronously with the lower table 2. The former (Z
The shaft guide A) is fixed to the side plate 3 and does not move, whereas the latter (link mechanism D) follows the supporter B and always moves together (FIG. 4B, arrow Z5,
Z8). In particular, in the case of synchronous movement with the lower table 2 (the right diagram in FIG. 4B), the lower table 2, the supporter B, and the link mechanism D move together (arrows Z6, Z7, Z).
8). Therefore, the link mechanism D shown in FIG.
And a Z-axis telescopic link portion D that can be extended and contracted in the Z-axis direction by following this.

The operation of the present invention having the above configuration will be described below.

First, the abutting portion 5 shown in FIG. 1 is moved in the X-axis direction on the stretch 4 and the ball screw 9 is rotated to move the post 6 along the rail 8 attached to the inside of the supporter B. When the ball screw 15 is rotated by moving the handle 11 in the Y-axis direction and further rotating the handle 11, the nut 16 (FIG. 2), and thus the supporter B also moves in the Z-axis direction. Accordingly, the butting portion 5 also moves in the Z-axis direction.

After the setup is performed in this manner, the work W is positioned by abutting the end of the work W against the abutment portion 5.

During this time, from the viewpoint of the entire back gauge device, even when the supporter B moves in the Z-axis direction, since the supporter B is supported by the Z-axis guide portions A fixed to each side plate 3,
It is supported at at least four points.

Therefore, the eccentric load is not applied to the lower table 2, and the lower table 2 does not tilt backward or fall down, and the work W can be accurately positioned.

This is the same not only in FIG. 1 but also in FIGS. 3 and 4.

In particular, in the case of FIG. 4, the entire back gauge device is provided with the links 40 and 41 constituting the Z-axis telescopic link part D.
And at least four points via the box 43 and the reinforcing plate 47.

On the other hand, the abutment section 5 shown in FIG. 1 moves in the Z-axis direction simultaneously with the movement of the supporter B in the Z-axis direction.

Therefore, the abutting pressing force acting when positioning the work W is determined by the abutting portion 5 → stretch 4 →
It is transmitted in the order of the post 6 → the supporter B → the Z-axis guide portion A → the side plate 3, irrespective of the position of the butting portion 5.

That is, the path through which the abutting pressing force is transmitted is always constant regardless of the height of the abutting portion 5, and therefore, even if the abutting portion 5 is raised, the post 6 is not moved. Since the work W is stable, the work W can be accurately positioned without leaning or falling backward.

This is the same in the embodiments shown in FIGS. 3 and 4.

In particular, in FIG. 4, the abutting and pressing force is transmitted in the order of the abutting portion 5 → stretch 4 → post 6 → supporter B → Z-axis telescopic link portion D. Irrelevant.

After the positioning of the work W, one of the upper table 1 on which the punch (not shown) is mounted and the lower table 2 on which the die (not shown) is mounted are moved in the Z-axis direction, and the punch and the die are moved. The work W is bent in cooperation.

In the case where the lower table 2 moves, FIG.
As shown in the figure, the supporter B connected to the lower table 2 via the gear box 14 and the ball screw 15 moves in the Z-axis direction in synchronization with the lower table 2.

Further, as shown in FIG.
When the lower table 2 is moved in the Z-axis direction while the rotation of the driving pulley 21 is stopped, the supporter B connected to the lower table 2 via the wire 20 and the supporter B (FIG. 3B)
(Right arrow, arrow Z2), and moves in the Z-axis direction in synchronization with the lower table 2 (arrow Z3).

Further, in the case shown in FIG.
When the lower table 2 is moved in the Z-axis direction, the supporter B connected to the lower table 2 via the ball screw 15 and the support table 4 moves synchronously (the right figure in FIG.
Z7), and the Z-axis telescopic link portion D also expands and contracts and moves in the Z-axis direction (the right diagram in FIG. 4B, arrow Z8).

That is, each of the Z-axis telescopic link portions D provided near both ends of the lower table 2 is not provided with any special drive source, and at least two supporters B moving in the Z-axis direction are provided. While moving in the Z-axis direction.

In the above embodiment, a case where the present invention is applied to a bending machine has been described. However, the present invention is not limited to this, and may be applied to a laser processing machine, a punching machine, a shearing machine and the like. Needless to say, the same effects as described above can be obtained.

[0094]

As described above, according to the present invention, the back gauge device is constituted by the Z-axis guide section A, the supporter B, and the supporter drive section C, so that the back gauge apparatus as a whole has at least four Z gauges. Since the lower table 2 is supported by the shaft guide portion A, an unbalanced load is not applied to the lower table 2, the lower table 2 does not tilt or fall backward, and the abutment portion 5 moves the supporter B in the Z-axis direction. Z while moving
Since the actuator moves in the axial direction, the path through which the abutting pressing force is transmitted is always constant regardless of the position of the abutting portion 5. 6 is stabilized and does not tilt or fall backward, thereby providing a back gauge device for accurately positioning the work and improving the accuracy of the flange dimension.

Further, when the lower table 2 moves, the supporter B alone can move in the Z-axis direction using the Z-axis guide section A as a common guide, and can move in the Z-axis direction in synchronization with the lower table 2. Since it can be moved, the structure is simplified, and there is also an effect that the cost of the entire back gauge device is reduced.

[0096]

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a detailed view of the first embodiment of the present invention.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a diagram showing a third embodiment of the present invention.

FIG. 5 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper table 2 Lower table 3 Side plate 4 Stretch 5 Abutment part 6 Post A Z-axis guide part B Supporter C Supporter drive part

Claims (4)

[Claims] 1. A bending machine for moving one of an upper table on which a punch is mounted and a lower table on which a die is mounted in the Z-axis direction and bending the work by cooperation of the punch and the die. A back gauge device, comprising: at least two Z-axis guide portions fixed to respective side plates erected on both sides of the lower table; a striking portion via a stretch and a post; And a supporter supported by the supporter and movable in the Z-axis direction. The supporter is provided between the supporter and the lower table, and only the supporter is moved in the Z-axis direction with respect to the lower table. A back gauge device comprising: a supporter driving section for determining a height position. 2. The method according to claim 1, wherein the lower table moves in the Z-axis direction, wherein the supporter drive unit is coupled to a rotation transmission mechanism including a drive shaft and a driven shaft, and a nut screwed to the ball screw. And the lower table and the supporter are connected by the supporter drive unit, and the supporter moves in the Z-axis direction along the Z-axis guide unit in synchronization with the lower table, and the lower table is stopped. The back gauge device according to claim 1, wherein the back gauge device independently moves in the Z-axis direction. 3. The lower table moves in the Z-axis direction, wherein the supporter drive section is constituted by a wire wound around a drive pulley and a driven pulley, and the lower table is moved by the supporter drive section. The supporter is connected to the lower table along the Z-axis guide portion in synchronization with the lower table, and moves independently in the Z-axis direction with respect to the stopped lower table. Back gauge device. 4. A bending machine for moving one of an upper table on which a punch is mounted and a lower table on which a die is mounted in the Z-axis direction and bending the work by cooperation of the punch and the die. A back gauge device, comprising: a Z-axis telescopic link portion that is installed near both sides of the lower table and that can expand and contract in the Z-axis direction; and a striking portion through a stretch and a post; A supporter supported by the Z-axis telescopic link portion and movable in the Z-axis direction; and a supporter provided between the supporter and the lower table, wherein only the supporter is moved in the Z-axis direction with respect to the lower table. And a supporter driving section for determining a height position of the section.