JP2000237820A - Device and method for positioning work and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce tact time, to eliminate mistake in bending by clarifying the lateral positioning toward the right and left of a work and also to shorten setup time by clarifying the layout position of a die. SOLUTION: In a bending machine such as a press brake having an NC controller, in addition to a back gage stopping part for back and forth positioning the work W arranged at the rear of a lower table 2 on which the lower die 1 is placed, a device for laterally positioning the work is formed as a laser unit UL consisting of laser oscillating parts A, B which are freely movable right, left, back and forth and freely rotatable around a horizontal axis and the laser unit UL is controlled with the computer of an NC controller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work positioning device and method using a laser unit in a bending machine such as a press brake having an NC control device, and a storage medium.

[0002]

2. Description of the Related Art Conventionally, in the bending of a plate material, for example, when positioning a work having a horizontal flange (see FIG. 5) in the left-right direction, an operator visually adjusts the position of the work with respect to the punch position, and performs step-by-step operations. When performing the bend operation, the position in the horizontal direction and the mold station are confirmed on the end of the back gauge abutment and the display screen of the NC device.

In order to determine and set the die layout, a method has been adopted in which the die is positioned and set on a lower table with reference to the end of the abutment as shown in FIG.

[0004]

However, in the above-mentioned prior art, when positioning a work having a horizontal flange, the punch is gradually lowered by an inching operation or the like so that the gap between the punch and the die blade is gradually narrowed. Since the alignment is performed, there is a problem that a tact time is required and a large number of bending errors occur.

[0005] In performing the step bending operation, when the flange size is large and long, or when the gap between the punch and the die is narrow, the end of the abutment cannot be used, and when the shape of the work becomes complicated, the NC apparatus becomes difficult. There is a problem that it cannot be confirmed only on the display screen.

In the case of setting the die layout, if the end of the abutment is used as a reference, the layout cannot be performed over the entire length of the table, the die must be removed once, and only the die can be set. There are problems such as not. In addition, the back gauge (B / G) abutting portion basically located behind the inside of the apparatus has some problems such as being located at a position where it is difficult for an operator to see.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and clarifies the left and right lateral positioning of a work to reduce tact time, eliminate bending errors, and reduce the die layout position. An object of the present invention is to provide a work positioning apparatus and method and a storage medium which can shorten the setup work time by making it clear.

[0008]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) In a bending machine such as a press brake having an NC control device, a back gauge abutment portion for positioning a work disposed in the back of a lower table on which a lower die is mounted for positioning in a front-rear direction. In addition, the apparatus for positioning the workpiece in the lateral direction is formed as a laser unit including a laser oscillation unit that is movable back and forth, right and left, and is rotatable around a horizontal axis, and the laser unit is controlled by a computer of the NC controller. A work positioning device, characterized in that the work positioning device is configured to:

(2) The laser unit is located above the lower table on which the lower mold is mounted, and is provided on the upper surface of the upper table having the upper mold, and is slidable in the front-rear and left-right directions. At the same time, it is characterized by a laser oscillating section which is rotatable around the horizontal axis of the horizontal movable member, oscillates and irradiates a laser beam from a bird's-eye view to a desired position of the horizontal movable member, and can indicate the position of the work. The work positioning device according to the above (1).

(3) The work positioning device according to the above (1), wherein the laser units are provided on the upper surface of the upper table in pairs so that both ends of the work can be detected via a horizontally movable member. apparatus.

(4) inputting product and die information relating to processing conditions such as bending to the NC controller; calculating the position of the laser unit from the die information; and moving the laser unit to a predetermined position And irradiating the laser light in a desired direction, and positioning the workpiece in the front-rear direction or at the same time in the left-right longitudinal direction by the back gauge abutting portion using the laser light. Work positioning method.

(5) A storage medium storing a program for realizing the work positioning method described in (4).

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below.

FIG. 1A is a side view showing an embodiment of a work positioning apparatus according to the present invention, and FIG. 1B is a front view and a view showing an embodiment of the work positioning apparatus according to the present invention. 2 is a flowchart showing operation steps including computer control, FIG. 3 is a diagram illustrating a situation in which a work is positioned in the front-rear direction, and FIG. 4 is inching when positioning a punch between both flanges of a box-bending work. FIG. 5 is an explanatory view showing an operation situation, FIG. 5 is an explanatory view of positioning between a punch and a die of a work having a horizontal flange, FIG. 6 is an explanatory view showing a die mold setting state using an abutting end, FIG.
(A) is an explanatory front view showing an example in which the work is positioned by engaging the punch side surface and the abutting side surface, and (b) is a perspective view showing an example in which the work is positioned by engaging the punch side surface and the abutting side surface. FIG. 8 is an external perspective view of a press brake as an example of a bending machine.

An operation for positioning a work using a press brake as an example of a bending machine will be described below.

When the work to be processed is positioned at a desired position, the work is operated by an operator through a gap between a punch and a die when a back gauge (B / G) provided inside the apparatus is abutted. In this case, the desired end of the work is brought into contact with the abutment of the back gauge (B / G) to position the work in the front-rear direction (see FIG. 3), and then the work is bent into a box bending shape. If you do,
As shown in FIG. 4, it is necessary to accurately and accurately position the punch between the flanges A and B, and reduce the processing speed of the upper table on which the punch is mounted to reduce the work end between the flanges C and D and the punch. The operator performs horizontal positioning while moving the work little by little so that the ends match, and performing inching operation to lower the punch.

The back gauge (B / G) abutment is positioned in advance so as to coincide with both ends of the punch, and the work side surface is aligned with the outer surface of the back gauge (B / G) abutment. The positioning of the work in the left-right lateral direction (longitudinal direction) has been performed. That is, each operation for positioning was performed using the abutting side surface as a guide.

Back gauge (B / G) The work is positioned in the left and right and lateral directions using the side of the abutment as a guide. However, since the abutment is installed inside or behind the apparatus, the position to be adjusted is checked. It is difficult and it takes time for setup work.

In this embodiment, a back gauge abutting portion for positioning the work W disposed in the back of the lower table 2 on which the lower die forming the die 1 is mounted, that is, in the back of the inside of the apparatus. In addition, a device for positioning the workpiece W in the horizontal direction is formed as a laser unit UL including laser oscillation units A and B that can move back and forth, right and left, and can turn around a horizontal axis. The laser unit is configured to be controlled by a computer of an NC control device, and the laser unit is located above and opposed to a lower table 2 on which a lower mold for forming a die 1 is mounted, and forms a punch 4. It is provided on the upper surface of an upper table 5 having an upper mold, is slidable in the front-rear, left-right directions, and is freely rotatable around the horizontal axis of the horizontal movable member 3.
A laser beam (visible light laser) is oscillated and radiated from a bird's-eye view to a desired position of the horizontal movable member 3, and the laser unit includes laser oscillation units A and B capable of indicating a position of a work. Pairs are provided on the upper surface so that both ends of the work W can be detected via the horizontally movable member 3.

It is to be noted that a step of inputting product and mold information relating to processing conditions such as bending to the NC controller, a step of calculating the position of the laser unit UL from the mold information, and a step of moving the laser unit UL to a predetermined position. Moving, oscillating and irradiating a laser beam in a desired direction, and a workpiece W by a back gauge (B / G) abutting portion.
Performing the positioning in the left-right longitudinal direction after or simultaneously with the positioning in the left-right direction by using the laser light, and a storage medium storing a program for realizing the method for positioning the work. .

The laser oscillating units A and B have a function of oscillating and irradiating a wide-angle (adjustable within a range of 0 ° to 90 °) laser light (visible laser) having a width of 1 mm or less.

The operation will be described based on the above configuration and the flowchart of FIG.

In a press brake PB having an NC controller as an example of a bending machine, product information such as a bending angle, a flange length, a bending length, a punch tip R, a die V groove width, a mold length, First, NC information such as mold position
Input to the computer memory in the controller (step S
1) A computer in the NC controller calculates the positions of the laser oscillation units A and B of the laser unit UL based on mold information such as mold length and mold position (step S2).
Next, the laser unit UL is moved to a predetermined position by a driving device (not shown) in the Y-axis direction and the L-axis direction (step S3), and a laser oscillation unit A provided at a desired position of the movable member 3 in bird's-eye view. After adjusting the bird's-eye angle of B, the laser oscillation units A and B are moved toward a predetermined position of the work W to be inserted between the punch 4, the die 1 and the punch 4 and the die 1.
The laser light (visible light laser) is oscillated and emitted (step S4), and the operator inserts the work W into the gap between the punch 4 and the die 1 and abuts the back gauge (B / G) abutting portion to move the work W in the front-rear direction. And the laser beam is oscillated and oscillated to perform horizontal and horizontal positioning with a target at a specified position (step S5).
The upper table 5 on which is mounted is lowered by a drive mechanism (not shown) to perform a desired bending process (Step S).
6).

The position where the laser beam is oscillated and radiated can be confirmed closer to the operator than the position of the back gauge (B / G) abutting portion, so that the work can be easily aligned. Bending errors were reduced, and production efficiency was improved.

To further explain, since it is a laser beam, there is an advantage that it can be bent without interfering with the material.

The function of the laser unit UL will be additionally described below.

(1) Both the laser oscillation units A and B control the movement in the Y-axis direction by the computer of the NC control device.

(2) In the case of box bending and step bending operation, the positions of both ends of the work W are determined by the laser oscillation units A and B.
The laser beam irradiates a predetermined position to give an instruction and inform the operator. This predetermined instruction operation can be controlled for each process.

(3) When deciding the mold layout, when mold information is selected on the NC controller, the laser unit operates based on the mold information, and the position of both ends of the desired mold is determined by the laser oscillation unit. Is notified to the operator by the laser beam oscillation irradiation from the operator, and the operator sets the mold in accordance with the laser beam oscillation irradiation position.

(4) The shape of the mold is not limited, and the set position can be selected at any position on the table.

[0032]

According to the present invention, by clarifying the left and right lateral positioning of the work, the tact time can be reduced, bending errors can be eliminated, and the die layout position can be clarified, so that the setup work can be performed. Time can be reduced.

[Brief description of the drawings]

1A is a side view showing an embodiment of a work positioning device according to the present invention, and FIG. 1B is a front view showing an embodiment of the work positioning device according to the present invention.

FIG. 2 is a flowchart showing steps of operation including computer control.

FIG. 3 is an explanatory diagram of a situation in which a positioning operation in a front-rear direction of a work is performed.

FIG. 4 is an explanatory view showing an inching operation state when a punch is positioned between both flanges of a box-bending shape work.

FIG. 5 is an explanatory diagram of positioning between a punch and a die of a work having a horizontal flange.

FIG. 6 is an explanatory view showing a die mold setting state using a butting end.

7A is a front explanatory view showing an example in which the work is positioned by engaging the punch side and the abutting side, and FIG. 7B is a perspective view showing an example in which the work is positioned by engaging the punch side and the abutting side. Figure

FIG. 8 is an external perspective view of a press brake as an example of a bending machine.

[Explanation of symbols]

 Reference Signs List 1 die (lower mold) 2 lower table 3 movable member 4 punch (upper mold) 5 upper table A, B laser oscillation unit UL laser unit PB press brake (as an example of a bending machine)

Claims (5)

[Claims] In a bending machine such as a press brake having an NC control device, in addition to a back gauge abutting portion for positioning a work disposed in the back and forth of a lower table on which a lower die is mounted, for positioning in a front-rear direction. Then, a device for positioning the workpiece in the lateral direction is formed as a laser unit including a laser oscillating unit that is movable back and forth, right and left, and is rotatable around a horizontal axis, and the laser unit is controlled by a computer of the NC control device. A work positioning device characterized by having such a configuration. 2. The laser unit is positioned above and opposed to a lower table on which a lower mold is placed, and is provided on an upper surface of an upper table having an upper mold, and is slidable in the front-rear and left-right directions. At the same time, it is characterized in that it comprises a laser oscillating section which is rotatable around a horizontal axis of the horizontally movable member, oscillates and irradiates a laser beam from a bird's-eye view to a desired position of the horizontally movable member, and can indicate a position of a work. The work positioning device according to claim 1, wherein 3. The work positioning apparatus according to claim 1, wherein the laser units are provided in pairs on the upper surface of the upper table so that both ends of the work can be detected via a horizontally movable member. 4. A step of inputting product and mold information relating to processing conditions such as bending to an NC controller, a step of calculating a position of a laser unit from mold information, and moving the laser unit to a predetermined position. A step of irradiating a laser beam in a desired direction with oscillation, and a step of positioning the workpiece in the front-rear direction or at the same time in the left-right longitudinal direction by the back gauge abutting portion by the laser beam. Positioning method. 5. A storage medium storing a program for realizing the work positioning method according to claim 4.