JP2849428B2 - Back gauge equipment for plate processing equipment - Google Patents

Description

Description: Object of the Invention (Industrial application field) The present invention relates to a back gauge device of a plate processing apparatus used for a plate processing apparatus such as a press brake and a shearing machine, and particularly to a plate processing apparatus. The present invention relates to a back gauge device of a plate material processing device of a type in which a plurality of abutment gauges each of which can be individually moved in a width direction of the plate material.

(Background Art) As a back gauge device used in a plate processing device such as a press brake or a shearing machine, two abutment gauges respectively movably attached to stretches extending in the width direction of the plate processing device are provided. In this type of back gauge device, when the tip edge of the workpiece is hit against the striking gauge, the operator determines the width dimension of the striking surface of the workpiece. However, the number of butting gauges to be used and the arrangement position thereof are determined accordingly.

Further, an automatic contact switch constituted by a limit switch or the like at the tip of the butting gauge is provided, and when the automatic contact switch is closed, the ram starts to move up and down. Usually, when the automatic contact switches provided on each of the two butting gauges are closed, the ram starts to move up and down.

[Problems to be Solved by the Invention] However, depending on the case, depending on the width of the workpiece, the workpiece may hit only one of the abutment gauges. It is necessary to select and set whether both automatic contact switches are valid or only one automatic contact switch is valid according to the width dimension.

The present invention provides a back gauge device of a plate material processing apparatus configured such that the number of effective butting gauges and their disposition positions can be appropriately and automatically set in accordance with the width dimension of a workpiece. The purpose is.

[Configuration of the Invention] (Means for Solving the Problems) In view of the above-described conventional problems, the present invention provides a plurality of abutting gauges individually movable in a width direction of a plate processing apparatus, and In a back gauge device provided with a sensor for detecting an abutment of a plate material on an abutment gauge, a difference dimension between the abutment lateral width dimension of the plate material and a minimum interval dimension when the sensors approach each other is calculated. Number setting means for determining the number of butting gauges to be used on the basis of one or more, and the position of the butting gauge used in the width direction based on the butting width dimension of the plate material and the arrangement position of the plate material. And a position control means for controlling.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings of addition.

FIG. 7 shows a press brake as an example of a preferred plate processing apparatus using the back gauge according to the present invention. The press brake includes a ram 3 as a lower table at the lower part of the C-shaped frame 1 and an upper table 5 fixed at the upper part.
A lower mold 7 is attached to the ram 3 and an upper mold 9 is attached to the upper table 5. The ram 3 is driven upward by the ram driving fluid pressure cylinder device 11 to lower the lower mold 7. The bending press working of the plate material W which is the workpiece is performed by the mold 7 and the upper mold 9.

The back gauge device 13 is located behind the bending press section by the lower mold 7 and the upper mold 9, that is, on the right side in FIG.
Is provided. The back gauge device 13 has a stretch 17 supported by a support member 15 and movable in the left-right direction as viewed in FIG.

The stretch 17 extends in the width direction of the press brake, and as shown in FIG. 4, the two right and left abutment gauges 19 and 21 are individually provided in the direction of extension, that is, the width of the press brake. It is movably supported in the direction. A rack 23 is attached to the stretch 17 along the direction in which it extends, and a pinion that meshes with each of the racks 23 is attached to each of the two abutment gauges 19 and 21, although not shown in the drawing. Have been. These pinions are individually driven to rotate by servo motors 25 and 27 provided on the butting gauges 19 and 21, respectively. As a result, the right and left abutment gauges 19 and 21 individually move in the extending direction of the stretch 17, that is, in the width direction of the press brake, and are respectively disposed at arbitrary positions.

Abutting tip 19 of butting gauge 19, 21 with workpiece
Each of a, 21a is provided with a plunger 33, 35 of a limit switch 29, 31 incorporated in each butting gauge. Each of the plungers 33 and 35 is pressed by abutting the leading edge of the plate material W as a workpiece, that is, the abutting edge, and the pushing causes the limit switch 29 or 31 to be closed.

FIGS. 5 and 6 show another specific embodiment of the butting gauges 19, 21 as shown in FIG. In FIGS. 5 and 6, portions corresponding to FIG. 4 are indicated by the same reference numerals as those given in FIG.

FIG. 1 shows an embodiment of a control system of the back gauge device according to the present invention.

In FIG. 1, reference numeral 37 denotes a control device including an NC control device or an automatic programming device, and the control device 37 is a number setting means for setting an effective number of two butting gauges 19 and 21. 3 includes position control means 41 for controlling the arrangement position of the abutment gauges 19 and / or 21, and as shown in FIG. And the offset OF of the center position Cb of the bent portion of the plate W with respect to the center position Cm of the press brake.
₀ and, given the offset amount OF ₁ with the center position Ct parts butting against the center position Cb bend region, effective abutment selected and set the number of gauge by the number setting means 39 in accordance with these information, also An arrangement position of the abutment gauge in the lateral width direction is set, and a control signal relating to the arrangement position is output to the servo drive means 45.

The servo drive unit 45 drives the servo motors 25 and 27 based on the control signal from the position control unit 41, and the encoders 47 and 49 connected to the servo motors 25 and 27 rotate the servo motors 25 and 27. A signal relating to the amount is given to control the arrangement position of the butting gauges 19 and 21 in the width direction in a feedback manner.

The control device 37 receives the ON / OFF signals of the limit switches 29, 31 or both corresponding to the valid butting gauges determined by the number setting means 39, determines the butting of the plate material W to be completed, and responds accordingly. Press brake driving means 51
To control the operation of the ram drive hydraulic cylinder device 11.

FIG. 2 shows a control routine for determining the effective number of butting gauges and controlling the arrangement position in the back gauge device according to the present invention.

In the control routine shown in FIG. 2, first, in the first step S10, the abutting lateral width dimension TL
When it is performed for taking the offset amount OF ₀ and OF ₁ above.

After step S10, the process proceeds to step S20, and step S20
In this case, the difference dimension X is calculated by subtracting the unique minimum gap dimension JL of the plungers 33 and 35 of the two striking gauges 19 and 21 from the striking lateral width dimension TL. After step S20, the process proceeds to step S30.

In step S30, it is determined whether or not the difference dimension X is smaller than 0. When X <0, the width dimension TL of the abutting portion of the plate W is smaller than the minimum interval dimension JL of the automatic contact, and this time is when only one abutting gauge can be used. At this time, the process proceeds to step S40. Otherwise, that is, when X ≧ 0, it is when the two butting gauges 19, 21 can be used, and at this time, the process proceeds to step S90.

Te is at the step S40, the added value is greater than 0 and the offset amount OF ₀ and the offset amount OF ₁ to determine butting gauge 19 and the right to select using either gauge 21 butting left It is determined whether or not this is the case. Incidentally, the offset amount OF ₀ and OF ₁ is a negative value is left, right direction is set to a positive value. Thus, when the support sections butting of the plate material W when a OF ₀ + OF _{1 <0} is if present biased to the left, the process proceeds to step S50 in this case, otherwise, i.e. OF ₀
When + OF ₁ ≧ 0 and the butting portion of the plate W is deviated to the right, the process proceeds to step S60.

In step S50, the left butting gauge 19 is selected, and then the process proceeds to step S70 to determine the arrangement position YL of the left butting gauge 19 according to the following equation.

YL = OF ₀ + OF ₁ On the other hand, in step S60, the right butting gauge 21 is selected, and then in step S80, the arrangement position YR of the butting gauge 21 is determined according to the following equation. Is done.

YR = OF ₀ + OF _{1 When} the difference dimension X is not 0 <0 in step S30, that is, X ≧
When it is 0, both right and left butting gauges 19 and 21 are used. At this time, step S90 is executed, and in step S90, both left and right butting gauges 19 and 21 are enabled. Is done.

After step S90, the process proceeds to step S100, and step S10
In the case of 0, the arrangement position YL of the left butting gauge 19 and the arrangement position YR of the right butting gauge 21 are determined according to the following equations.

YL = − (TL / 2) + OF ₀ + OF ₁ + OFc YR = (TL / 2) + OF ₀ + OF ₁ −OFc The offset amount OFc ensures that the workpiece W strikes each of the strike gauges 19 and 21. As described above, it corresponds to the movement amount for moving these butting gauges 19 and 21 to the center side.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to this, and various embodiments can be made within the scope of the present invention. It will be clear to those skilled in the art.

[Effects of the Invention] As can be understood from the description of the embodiment as described above, in the present invention, the sensors provided on the plurality of butting gauges 19 and 21 are close to the butting width dimension direction TL of the plate material W. The difference dimension X from the minimum gap dimension JL at the time is
The number of butting gauges 19, 21 to be used is determined to be singular or plural based on the calculation result, and the positioning control of the butting gauges 19, 21 to be used is performed by the position control means 41. It is something to be done.

Therefore, according to the present invention, the number and position of the butting gauges to be used are automatically set according to the butting width dimension TL of the plate material W and the position of the plate material in the width direction,
Its automation is easy.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a control system of a back gauge device of a sheet material processing apparatus according to the present invention. FIG. 2 is a flowchart showing one embodiment of a control routine of the back gauge device according to the present invention. FIG. 4 is a plan view showing the required specifications of the back gauge device according to the present invention in relation to the workpiece and the butting gauge. FIG. 4 is a perspective view of the main part of the back gauge device according to the present invention. 5 is a plan view showing an example of a butting gauge used in the back gauge device according to the present invention, FIG. 6 is a front view of FIG. 5, and FIG. 7 is a press suitable for using the back gauge device according to the present invention. It is a side view which shows an example of a brake. 3 ... Ram, 5 ... Upper table 7 ... Lower mold, 9 ... Upper mold 17 ... Stretch 19, 21 ... Butt gauge 29, 31 ... Limit switch 33, 35 ... Plunger 37 ... ... Control device, 39 ... Number setting means 41 ... Position control means

Claims (1)

(57) [Claims] An abutment gauge (19, 21) that can be individually moved in the width direction of a plate material processing apparatus, and a plate material (W) is abutted against each abutment gauge (19, 21). In the back gauge device provided with the sensors (29, 31) for detecting, the size (TL) of the plate material (W) in the abutting width direction and the minimum interval size (JL) when the sensors (29, 31) approach each other. A number setting means (39) for calculating the difference dimension (X) between the two and determining whether the number of butting gauges (19, 21) to be used is singular or plural based on the difference dimension (X); ) And a position control means (41) for controlling the position of the abutment gauge (19, 21) in the width direction based on the abutment width direction dimension (TL) and the arrangement position of the plate material (W). A back gauge device for a plate material processing device.