JPH1034242A - Back gage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the errors in flange dimensions caused by the torsion and bend of stretch by eliminating the stretch, making each supporter movable in the X axis direction, determining a position of a butt part in the X axis direction, and positioning correctly a work. SOLUTION: The back gage device is arranged in the rear part of a bending machine moving either of an upper table a punch mounted with or a lower table a die mounted with in the Z axis direction and bending the work in cooperation with the punch and the die. This back gage device is composed of X axis guide part A, supporter B and supporter drive part C. The X axis guide part A is fixed on the lower table 2, and is extended in the X axis direction. The supporter B is equipped with the butt part 5 freely movable in the Y axis direction and the Z axis direction, loosely fitted to the X axis guide part A, and supporter by the X axis guide part A, and at least two supporters B are movably mounted in the X axis direction. By moving each supporter B in the X axis direction by the supporter drive part C, and by making a distance L between both supporters B variable, a position in the X axis direction of the butt part 5 is 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 setting up in this way, FIG.
As shown in (1), the edge of the work W is abutted against the abutting portion 105, and the bending 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. 5C is obtained.

[0009]

However, the above conventional technique (FIG. 5) has the following problems.

[0010] As is apparent from FIG.
An abutment portion 105 is provided on the stretch 106, and the abutment portion 105 moves in the X-axis direction on the stretch 106.

Therefore, when the abutting portion 105 moves in the X-axis direction, the position of the abutting portion 105 is not determined because the stretch 106 is twisted or bent.

As a result, the bending position b of the work W (FIG. 5)
It becomes difficult to accurately position (B)) at the processing position c, and an error occurs in the flange dimension H (FIG. 5C) obtained by performing the bending.

[0013] It is an object of the present invention to eliminate the stretch, to make each supporter movable in the X-axis direction, to determine the position of the abutting portion in the X-axis direction, and to accurately position the work, thereby torsion and bending of the stretch. It is an object of the present invention to provide a back gauge device in which an error of a flange dimension due to the above is reduced.

[0014]

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) an X-axis guide portion A fixed to the lower table 2 and extending in the X-axis direction;
X has an abutting portion 5 movable in the axial direction and the Z-axis direction.
At least two supporters B loosely fitted to and supported by the shaft guide portion A and movably mounted in the X-axis direction.
And (3) a supporter drive section C that determines the position of the abutment section 5 in the X-axis direction by moving each supporter B in the X-axis direction to change the distance L between the supporters B. A technical measure called a back gauge device characterized by this is taken.

Therefore, according to the configuration of the present invention, each supporter B moves in the X-axis direction, so that both supporters B
The distance L between them can be made variable (see FIG. 2).
(A), FIG. 4 (A)), butting part 5 without stretching
Can be determined in the X-axis direction, and the twist and bending of the stretch can be eliminated.

Therefore, the present invention acts to provide a back gauge device that reduces errors in flange dimensions by accurately positioning a work.

[0017]

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

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 front 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.

In the following description, the front or the front means the lower table 2 side, and the rear or the rear means, for example, the Y-axis motor My side in FIG.

A guide base 8 is provided on the back side of the lower table 2, and a rail 7 extending in the X-axis direction is fixed on the guide base 8. The supporter B is loosely fitted via the slider 6. The X-axis guide section A is constituted by the X-axis rail 7 and the guide base 8 for fixing the X-axis rail 7.

Each supporter B has a main body 4 extending in the Y-axis direction.
The slider 6 described above is provided on the lower surface of the main body 4, and the butting portion 5 is provided on the upper surface thereof as shown in the figure.

The abutment portion 5 projects forward from the host 6 and is screwed to a ball screw (not shown) rotated by a Z-axis motor Mz attached to the top of the host 6.

The host 6 to which the abutting portion 5 is attached is screwed to a ball screw (not shown) which is rotated by a Y-axis motor My built in a rear portion of the main body 4.

Therefore, with this configuration, the abutting portion 5
Is movable in the Y-axis direction and the Z-axis direction.

On the other hand, the main body 4 constituting each supporter B
An X-axis motor Mx is mounted on the inner side of the table, and a pinion 10 is provided at a tip end of a rotating shaft 11 of the X-axis motor Mx. The pinion 10 is located on the back side of the lower table 2 and has the above-described guide. Rack 9 provided above base 8
(FIG. 2 (B)).

The X-axis motor Mx, the pinion 10,
The rack 9 forms a supporter driving unit C.
In addition, the supporter driving unit C may be a manual type or a hydraulic / pneumatic cylinder.

FIG. 3 is an overall view showing a second embodiment of the present invention.

The main differences from the first embodiment shown in FIG. 1 are the location of the Y-axis motor My and the configuration of the X-axis guide section A and the supporter drive section C.

That is, a motor housing 14 is provided at the front of the main body 4 of the supporter B.
4 incorporates a Y-axis motor My.

A slider 16 is provided on the lower surface of the motor housing 14. The slider 16 is mounted on the X-axis rail 7 fixed to an L-shaped guide base 12 mounted on the back side of the lower table 2. It is fitting.

Further, on the front surface of the motor housing 14,
Each of the two sliders 15 is provided.
5 is loosely fitted on a reinforcing rail 19 fixed to the upper part of the L-shaped guide base 12 (FIGS. 3 and 4).

Then, the X-axis rail 7 and the reinforcing rail 1
9 constitutes the X-axis guide portion A.

As described above, the X-axis guide portion A is constituted by the reinforcing rail 19 in addition to the X-axis rail 7 because of the pressing force when the work W is pressed against the butting portion 5. In order to prevent bending of the supporter B and to prevent the supporter B from becoming unstable when it is supported by only the front X-axis rail 7 because it is a one-point support cantilever. is there.

X-axis motor M constituting supporter drive section C
x is attached to an L-shaped motor base 13 provided on the outside of the lower table 2, and the X-axis motor Mx on the right side in the drawing is a drive source of the supporter B on the left side, and the X-axis motor Mx on the left side Is a drive source of the right supporter B (FIG. 4A).

The right X-axis motor Mx has a bevel gear 3
0 is provided, and the bevel gear 30 is engaged with a bevel gear 31 coaxial with the drive pulley 23.

The driving pulley 23 has a lower belt 2
The lower belt 21 passes under the motor housing 14 of the right supporter B, passes under the motor housing 14 of the left supporter B, and is wound around the left driven pulley 22. ing.

The lower belt 21 is supported by the left supporter B.
As shown in FIG. 4B, when passing under the motor housing 14, a part of its outside is fixed to a belt stopper 17 provided on the lower surface of the motor housing 14 with screws 18.

With this configuration, when the right X-axis motor Mx is rotated, the lower belt 21 circulates, and only the left supporter B moves in the X-axis direction (FIG. 4).
(A) arrow X1).

The left X-axis motor Mx (FIG. 4)
(A)), a bevel gear 30 is provided,
0 meshes with a bevel gear 31 coaxial with the drive pulley 23.

The driving pulley 23 has an upper belt 2
0 is wound, and the upper belt 20 penetrates the motor housing 14 constituting the left supporter B.

That is, openings 14A and 14B are formed in the motor housing 14, and FIG.
(B)), the upper belt 20 enters from the left openings 14A and 14B of the motor housing 14, and the built-in Y
Passing in front of the shaft motor My, the right openings 14A, 14A
Exit from B.

The retracted upper belt 20 similarly passes through the motor housing 14 constituting the right supporter B (FIG. 4C) and is wound around the right driven pulley 22.

The upper belt 20 is connected to the right supporter B.
As shown in FIG. 4C, when the motor housing 14 penetrates through the motor housing 14,
Is fixed to the front surface of the device with screws 18.

With this configuration, when the left X-axis motor Mx is rotated, the upper belt 20 circulates, and only the right supporter B moves in the X-axis direction (FIG. 4).
Arrow X2 in (A)).

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

(1) Operation of the first embodiment (FIG. 1)

In FIG. 1, when the X-axis motor Mx constituting each supporter drive section C is driven to rotate the pinion 10, the pinion 10 rolls on the rack 9 with which the pinion 10 meshes.

As a result, each supporter B loosely fitted to and supported by the X-axis rail 7 moves in the X-axis direction (arrows X1 and X2 in FIG. 2A). Can be made variable, and the position in the X-axis direction of the butting portion 5 attached to each supporter B can be determined.

By driving the Y-axis motor My and the Z-axis motor Mz (FIG. 1), the positions of the butting portion 5 in the Y-axis direction and the Z-axis direction are determined.

After the setup is performed in this manner, the work W is abutted against the abutting portion 5 (FIG. 2B), and the work W is bent.

In this case, no stretch is provided,
As described above, by moving each supporter B in the X-axis direction, the position of the abutment portion 5 in the X-axis direction can be determined. As a result, the error of the flange dimension of the work W is reduced.

(2) Operation of the second embodiment

In FIGS. 3 and 4, each supporter driving section C
Of the bevel gear 30 by driving the X-axis motor Mx
Is rotated, the rotation in the vertical plane by the bevel gear 30 is converted into the rotation in a horizontal plane by the bevel gear 31 by the rotation transmission mechanism composed of the bevel gear 30 and the bevel gear 31, and each drive pulley 23 rotates, Lower belt 21 and upper belt 2 wound around pulley 22
0 circulates in each case (FIG. 4A).

Thus, the X-axis rail 7 and the reinforcing rail 1
9, the supporters B on the left side are circulated by the lower belt 21 and the supporters B on the right side are circulated by the upper belt 20. 4A (arrows X1 and X2 in FIG. 4A), the distance L between both supporters B
Can be varied (FIG. 4A), and each supporter B
Can be determined in the X-axis direction of the butting portion 5 attached to the base member.

Further, by driving the Y-axis motor My and the Z-axis motor Mz (FIGS. 3 and 4), the positions of the butting portion 5 in the Y-axis direction and the Z-axis direction are determined.

After the setup is performed in this manner, the work W is abutted against the abutment portion 5 (FIG. 2B), and the work W is bent.

In this case, no stretch is provided,
As described above, by moving each supporter B in the X-axis direction, the position of the butting portion 5 in the X-axis direction can be determined, so that it is the same as in the first embodiment (FIGS. 1 and 2). In addition, the inaccuracy of positioning of the work W due to the twisting or bending of the stretch is eliminated, and the error of the flange size of the work W is reduced.

In the above embodiment, the case where the present invention is applied to the upward bending machine has been described. However, the present invention is not limited to this, and the downward bending machine, the laser processing machine,
The present invention is also applicable to a punching machine, a shearing machine, and the like, and can provide the same effect as the above.

[0060]

As described above, according to the present invention, since the back gauge device is constituted by the X-axis guide section A, the supporter B, and the supporter drive section C, each supporter B moves in the X-axis direction. Thus, the distance L between both supporters B can be made variable (FIG. 2A, FIG. 4).
(A)), the position of the abutting portion 5 in the X-axis direction can be determined without stretching, the twist and bending of the stretch are eliminated, and the positioning of the work is accurately performed, thereby reducing the error in the flange dimension. The technical effect of providing a back gauge device has been achieved.

[0061]

[Brief description of the drawings]

FIG. 1 is an overall view showing a first embodiment of the present invention.

FIG. 2 is an operation explanatory view of the first embodiment of the present invention.

FIG. 3 is an overall view showing a second embodiment of the present invention.

FIG. 4 is a detailed view showing a second 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 Main body of supporter B 5 Abutment part 6 Post A X-axis guide part B Supporter C Supporter drive part

Claims (3)

[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: an X-axis guide portion fixed to the lower table and extending in the X-axis direction; and a butting portion movable in the Y-axis direction and the Z-axis direction.
At least two supporters loosely fitted to and supported by the shaft guide portion and movably mounted in the X-axis direction; and by moving each supporter in the X-axis direction to make the distance between both supporters variable. And a supporter drive for determining the position of the abutting portion in the X-axis direction. 2. The supporter drive section includes an X-axis motor attached to each supporter, a pinion connected to the X-axis motor, and a rack fixed to a lower table and engaged with the pinion. The back gauge device according to claim 1. 3. The supporter drive section includes an X-axis motor mounted outside the lower table, a lower belt and an upper belt circulated by the X-axis motor and fixed to one of the supporters. The back gauge device according to claim 1.