JPH0715609Y2 - Work positioning device for press brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a work positioning device for R-bending by a press brake.

[Conventional technology]

When R-bending a work such as a plate material using a conventional press brake, first, as shown in FIG. 4 (a), the tip of the work a is brought into contact with the backstop b and the upper die c and the lower die d are contacted.
The work a is bent between them, and then the back stop b is moved to the lower mold d1 side by an arbitrary pitch as shown in FIG. 4 (b) while one end of the work a is moved to the upper mold c and the lower mold d. Bend between.

When the front and rear ends of the work a are reversed, the back stop b is moved again and the other end is bent as shown in FIG. 4 (c) to finally obtain the shape shown in FIG. 4 (e). R-bent.

[Problems to be solved by the device]

However, in the above-mentioned conventional method, it is necessary for the operator to hold the work a during bending and press the end portion against the backstop b, and when the work a is a long object or a heavy object, a lot of work is required. When the work a is long, the work a needs to be bent first, and then the work a must be inverted to bend the other end. There were problems such as difficulty.

When the work a, which has already been bent, is brought into contact with the backstop b and the other end is bent, the end on the backstop b side springs up at each bend, and the backstop b is returned as shown in FIG. 4C. Since it deviates from b, it is necessary to abut the back stop b each time, and there is a problem such that highly accurate R bending processing cannot be performed.

This invention was made in order to improve the above-mentioned problems, and it is not necessary for an operator to hold the work during the R-bending, and a press that enables the R-bending of a long work without inverting the work. An object of the present invention is to provide a work positioning device for a brake.

[Means and Actions for Solving the Problems]

In order to achieve the above-mentioned object, the present invention abuts one end side of a work with a backstop device provided at the rear part of the press brake body to position the work, and in this state, the work is placed between the upper die and the lower die. In a press brake for performing the bending process, a table on which a work to be bent is placed is detachably provided in the front part of the press brake body, and a positioning member movable on the table in the contacting and separating direction of the lower die. By providing the positioning member and the backstop device by a continuous rod together, the backstop device positions one end of the work to bend the work, and then the positioning member fixes the other end of the work. We provide a press brake work positioning device that can perform positioning and bending work, and perform R bending work without inverting the work. It is obtained by obtaining way.

〔Example〕

 An embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is a press brake main body, and a lower die 2 is installed on the upper part of a lower beam 1a, and a work 5 is provided between the lower die 2 and an upper die 4 attached to an upper beam 3 which is vertically movable.
Can be bent.

Further, 6 is a back-stop device for positioning the bending position of the work 5, which is a lower die 2 by a feed mechanism (not shown).
And a plurality of work receiving rails 6a are provided on the upper part thereof.

Further, 7 is a work positioning device installed on the front side of the press brake main body 1, and has a slender table 8 in the loading direction of the work 5, and the work 5 is placed on the upper surface of the table 8.
A plurality of ball casters 9 are provided to facilitate the movement of the ball casters.

A bracket 8a is projectingly provided on the lower surface of one end side of the table 8, and the bracket 8a and the lower beam 1a of the press brake main body 1 are connected via a height adjusting bolt 10 and the table 8 The bottom part of the end is a turn back
It is supported so as to be horizontal by a pillar 11 that can be adjusted to a high degree by 11a.

On the other hand, a guide rail 12 is laid in the longitudinal direction on the table 8 and a positioning member 13 is provided on the guide rail 12.
Is movably supported.

The positioning member 13 and the back-stop device 6 are also provided.
The work receiving rails 6 are connected by a connecting rod 14 so that the positioning member 13 can be moved in conjunction with the backstop device 6.

Next, the operation will be described with reference to FIGS. 3 (a) to 3 (d). When R-bending the work 5, first, as shown in FIG. 3 (a), the rear end of the work 5 is back-stopped. When the workpiece 5 is positioned by abutting against the workpiece 6, the upper beam 3 is lowered to bend one end of the workpiece 5 between the upper die 4 and the lower die 2, and then the backstop device 6 is moved by an arbitrary pitch. While moving to the lower die 2 side, the upper die 4 is repeatedly moved up and down to bend one end of the work 5 as shown in FIG.

When the bending work is completed on one end side of the work 5, the third
As shown in FIG. 3C, the end of the work 5 that has been bent is brought into contact with the positioning member 13 to position the work 5, and in this state, the backstop device 6 is moved away from the lower mold 2. Bending is performed between the upper die 4 and the lower die 2 while moving with an arbitrary pitch.

Since the backstop device 6 and the positioning member 13 are connected by the connecting rod 14, the movement of the backstop device 6 causes the positioning member 13 to move to the lower die 2 side as shown in FIG. Work 5 without reversing
R bending can be performed.

[Effect of device]

As described in detail above, this invention positions the work by the back-stop device and bends one end of the work, and then positions the other end of the work by the positioning member which works in conjunction with the back-stop device. Since the bending work is performed, the operator does not need to hold the work during the R bending work or reverse the work after the bending work on one end side, greatly reducing the burden on the worker. it can.

In addition, since the bending is performed by positioning the other end side with the positioning member after bending on one end side, it is not necessary to press the work against the backstop unlike the conventional operation during each bending process, which makes it possible to perform accurate R bending. Can be processed. Further, the backstop device and the positioning member are mechanically connected by a connecting rod, and the backstop device is used to move and position the positioning member. Since it does not require a control system to control
It can be provided at a low cost with a simple structure, and it can be easily attached to a general-purpose press brake, so it does not require a press brake dedicated to R bending, and when it is not in use, it can be removed to create a wide front brake body. A work space can be secured and does not interfere with work.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a side view, FIGS. 3 (a) to 3 (d) are operation explanatory views, and FIGS. 4 (a) to 4 (d). Is a conventional explanatory view. 1 is a press brake main body, 2 is a lower mold, 4 is an upper mold, 5 is a work, 6 is a back stop device, 8 is a table, 13 is a positioning member, and 14 is a connecting rod.

Claims (1)

[Scope of utility model registration request] 1. A workpiece 5 is positioned by bringing one end of the workpiece 5 into contact with a backstop device 6 provided at the rear portion of the press brake body. In this state, the workpiece 5 is placed between the upper die 4 and the lower die 2. In the press brake that bends
A table 8 on which a work 5 to be bent is placed is detachably provided on the front portion of the press brake body 1, and a positioning member 13 is provided on the table 8 so as to be movable in the contacting and separating direction of the lower die 2. At the same time, a work positioning device for a press brake, in which the positioning member 13 and the backstop device 6 are connected by a continuous rod 14.