JP2502257Y2 - Back gauge device for plate processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a back gauge device in a plate material processing machine provided in, for example, a press brake or a shearing machine.

(Prior Art) Conventionally, for example, in a back gauge of a press brake, an abutting member is slidably provided on a reference surface, which is a side surface of a stretch member, and a work is pressed against an abutting member that has been positioned. Was being done.

(Problems to be solved by the invention) By the way, in the above-described conventional back gauge, when the reference surface of the stretch member with which the abutting member engages and slides is machined, as the stretch member becomes longer,
Swelling occurs in the longitudinal direction (sliding direction). For this reason, the abutting dimension is determined by the distance between the die core and the abutting member, so if there is undulation on the side surface of the reference stretch member, there is a problem that the abutting dimension accuracy will naturally be affected. It was Further, when positioning is performed using two abutting members, there is a problem that the work is bent and set obliquely.

The object of the present invention is to improve the above-mentioned problems, by correcting the position of the work contact portion of the abutting member with respect to the waviness of the reference surface of the stretch member, and improving the dimensional accuracy. To provide a back gauge device in.

[Structure of the Invention] (Means for Solving the Problems) In view of the conventional problems as described above, the present invention has left and right supports extending in the front-rear direction orthogonal to the machining center that is long in the left-right direction. A movable table is mounted so as to be movable in the front-rear direction, and a motor for moving and positioning the movable table in the front-rear direction is provided on each support body, and both left and right ends are supported by each movable table. In a back gauge device in a plate material processing machine in which a plurality of abutting members for abutting a work to be processed are mounted on a stretch member so that the position can be adjusted in the left-right direction, A database in which the distance data from the processing center to the abutting attachment reference surface of the stretch member at each position across the end point is registered, and each abutting portion for the stretch member An arithmetic processing unit for calculating the distance from the machining center to each abutting member based on the mounting position of the and the distance data registered in the database, and the arithmetic result of the arithmetic processing unit. And a pulse distributor for performing pulse distribution to each of the motors so as to eliminate the difference based on the above.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

The abutting member is used as a back gauge device in a plate material processing machine such as a press brake or a shearing machine.

An example of the press brake adopting the present embodiment will be described. As shown in FIG. 2, the press brake 1 includes an upper apron 3 and a lower apron 5. A punch (not shown) is provided below the upper apron 3, and a die (not shown) is provided above the lower apron 5.

The mobile operation panel 7 and a mobile footbed device (not shown) are used for raising / lowering the lower apron 5 and for controlling the position of a back gauge described later, and include switches, MDI keys, an indicator lamp, Equipped with other various elements for NC control.

In the work machining space 9 between the upper apron 3 and the lower apron 5 of the press brake 1, a back gauge device is provided.
11 is provided. The back gauge device 11 includes a plurality of supports 13 protruding rearward near the left and right ends of the lower apron 5. The support 13 has a lead screw 17 driven by a drive motor 15 as a drive device.
And a linear motion guide 19 parallel to this.

Lead screw 17 and linear motion guide 19 above
A movable base 21 is provided on the above. This left and right movable stand 21,2
A stretch member 23 is horizontally provided between the first and second sides, and the height of the stretch member 23 can be adjusted by a lifting drive device 25.

An abutting member 27 that is movable in the left-right direction is provided on the attachment reference surface on the front surface of the stretch member 23.

With the above structure, the height of the abutting member 27 is adjusted by the elevation drive device 25 of the stretch 23. Positioning of the abutting member 27 in the front-rear direction is performed by driving the lead screw 17 by the drive motor 15 and moving the movable table 21 back and forth on the linear motion guide 19.

When the work is bent by the above-mentioned press brake 1, the work is first pressed by the press brake 1.
The workpiece is inserted into the workpiece processing space 9 and the tip of the workpiece is abutted against the tip surface of the abutting member 27 of the back gauge device 11.
Then, the lower apron 5 is moved up and down with respect to the upper apron 3 to perform bending between the punch and the die. It should be noted that these series of operations are automatically controlled by the NC device installed in the operation panel 7.

Next, the abutting position correction device 29 of the back gauge device 11 in the press brake 1 will be described.

As shown in FIG. 1, first, at the left and right ends of the stretch member 23 at the positions of the reference point O and the end point E, the distances between the bending line center SL and the work contact position 31 of the butting member 27 are equal, that is, , Lo and Ln are equalized, the stretch member 23 is moved forward and backward and positioned.

Next, stretch 23 from the reference point O to the end point E
Distance between each point in the longitudinal direction of the and the bending line center SL,
Measure the distance in the appropriate places subdivided from Lo to Ln. Based on this measured distance, the abutting mounting reference surface 33 of the stretch member 23
You can see the swell (distance data). The result is registered in the database 37 of the NC device 35 which is a part of the position correction device 29. Reference numeral 39 is a manual key.

An arithmetic processing unit 41 is connected to the database 37, and a pulse distributor 43 is connected to the arithmetic processing unit 41.

As an operation, the abutting member 27 is moved in the X-axis and Y-axis directions and set at a predetermined position depending on the width of the work to be processed.

After the position setting is completed, the required distance data is called from the distance data in which the distance from the work contact position 31 to the bending line center SL is registered in the database 37 of the NC device 35 to the arithmetic processing device 41, and the arithmetic processing is performed. Be done. That is, in the arithmetic processing device 41, the abutting member 27 located at the position of the distance X is used.
Distance α between the workpiece contact position 31 and the bending line center SL
And the difference δ between the work contact position 31 of the abutting member 27 at the distance Y and the distance β.

Then, the inclination amount of the stretch member 23 is calculated from the mounting position of the butting member 27 and the mounting position of the motor 15 (servo motor) so that the difference δ is eliminated, and the pulse distributor 43 positions the motor 15 by the pulse distributor 43. Send a command.

As a result, the distances α and β from the bending line center SL to the work contact position 31 of the abutting member 27 have the same size, and even if the abutting attachment reference surface 33 of the stretch member 23 has undulations, the abutting member The workpiece contact position 31 of 27 can be automatically corrected for accurate positioning, the dimensional accuracy is improved, and it is possible to deal with precision sheet metal.

The present invention is not limited to the embodiments described above, but can be implemented in other modes by making appropriate changes. For example, FIG. 3 shows an example in which a butt-position correcting device is adopted as a work position setting device 45 used in a turret punch press or a laser cutting machine.

The work position setting device 45 engages a clamp 47 that holds the work W with a carriage 49, and the carriage 49 is movable on a carriage base 51 from a motor 53 via a screw body 55. Can be moved back and forth by a motor 57 provided on the left and right through a screw body 59.

In this relationship between Carriage 49 and Carriage Base 51,
By adopting the abutting position correction device 29 described in detail with reference to FIG. 1, the position accuracy is improved and the processing dimension accuracy can be secured.

However, in this case, the carriage 49 is always moved in the left-right direction, and if the carriage base 51 has undulations, it is necessary to perform control so that the carriage 49 is always corrected in response to the left-right movement.

[Effects of the Invention] As can be understood from the above description of the embodiments, the present invention is, in short, the left and right supports (13) extending in the front-rear direction orthogonal to the machining center (SL) that is long in the left-right direction. The movable bases (21) are mounted to be movable in the front-rear direction, respectively, and the motors (15) for moving and positioning the movable bases (21) in the front-rear direction are provided in the support bodies (13). , A plurality of abutting members (27) for abutting a work to be processed are attached to a stretch member (23) supported by the movable bases (21) at both left and right ends thereof so that the positions thereof can be adjusted in the left-right direction In a back gauge device for a plate material processing machine, the reference point (O) on one end side of the stretch member (23)
To the end point (E) on the other end side, the database (37) in which the distance data from the processing center (SL) to the butting attachment reference plane (33) of the stretch member (23) is registered, and the stretch The distance (α) from the machining center (SL) to each butting member (27) based on the attachment position of each butting member (27) to the member (23) and the distance data registered in the database (37). , Β) and calculates the difference (δ) between the respective distances (α, β), and the difference (δ) disappears based on the calculation result of the calculation processing device (41). As each said motor (15)
And a pulse distributor (43) for performing pulse distribution.

As is apparent from the above configuration, in the present invention, the mounting reference from the processing center SL to the stretch member 23 at each position from the reference point O on one end side of the stretch member 23 that is long in the left-right direction to the end point E on the other end side. The distance data to the surface 33 is registered in the database 37, and when the attachment position of each abutting member 27 to the stretch member 23 is changed, the distance data of the database 37 and each abutting member are changed.
The distances α and β from the machining center SL to the abutting members 27 are obtained based on the mounting position of the motor 27, the difference δ between the distances α and β is calculated, and each motor 15 is adjusted so that the difference δ is eliminated. Is to control.

Therefore, according to the present invention, even if a waviness is temporarily generated on the mounting reference surface 33 during the manufacture of the stretch 23, the workpiece is attached to each abutting member 27 in a state where the error due to the waviness is corrected. Since it is possible to make contact with each other, even if the mounting position of the abutting member 27 changes due to a change in the width of the work, the work can be accurately positioned.

[Brief description of drawings]

FIG. 1 is a block diagram of a back gauge device showing the main part of the present invention, FIG. 2 is a perspective explanatory view of a pack gauge used in a press brake according to an embodiment of the present invention, and FIG. It is explanatory drawing of other Example replaced with FIG. 11 …… Back gauge, 23 …… Stretching member 27 …… Abutting member 29 …… Abutting position correction device 31 …… Workpiece contact position, 37 …… Database 41 …… Computing device, 43 …… Distributor

Claims (1)

(57) [Scope of utility model registration request] 1. A movable base (21) is attached to each of left and right supports (13) extending in the front-rear direction orthogonal to a machining center (SL) long in the left-right direction, and is movable in the front-rear direction. , A motor (15) for moving and positioning the movable bases (21) in the front-rear direction is provided on each support (13),
A plurality of abutting members (27) for abutting a work to be processed are attached to a stretch member (23) supported by the movable bases (21) at both left and right ends thereof so that the positions thereof can be adjusted in the left-right direction. In the back gauge device in the plate processing machine,
Abutment mounting reference surface (33) in the stretch member (23) from the processing center (SL) at each position from the reference point (O) on one end side of the stretch member (23) to the end point (E) on the other end side. ) Based on the distance data registered in the database (37), the attachment position of each butting member (27) to the stretch member (23), and the distance data registered in the database (37). An arithmetic processing unit (41) for calculating a distance (α, β) from SL to each butting member (27) and calculating a difference (δ) between the respective distances (α, β), and this arithmetic processing unit (41). And a pulse distributor (43) for performing pulse distribution to each of the motors (15) so as to eliminate the difference (δ) based on the calculation result of (41). Gauge device.