JP4610684B2 - Bending operation control device, control method, and storage medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bending operation control device and method in a bending machine having an NC device, and a storage medium.
[0002]
[Prior art]
Conventionally, in a plate material processing machine such as a bending machine, when a workpiece is gripped from above and below by a plate presser composed of a top die and a bottom die, and the workpiece is bent, a portion of the workpiece to be processed The dimension x of the flange portion is determined by the sum of the bending blade dimension a constituting the bend beam and the clearance c formed by the distance between the workpiece contact start point of the bending blade and the tip of the plate presser, that is, c + a ≦ x. In general, the standard clearance is 4 to 6 times the thickness of the workpiece W (4t in FIG. 5).
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional example, the dimension x of the flange portion of the workpiece is determined by the sum of the bending blade dimension a and the clearance c (see FIGS. 4A and 4B). In order to reduce the dimension x of the flange portion with a workpiece having a thickness, the bending blade size a must be reduced. Therefore, in a workpiece having a large plate thickness, the bending portion is in balance with the dimension x of the flange portion. There is a problem that whether or not processing is possible is affected.
[0004]
The present invention has been made paying attention to the above points, and provides a bending operation control device, a control method, and a storage medium that can improve the processing function without reducing the size of the bending blade. Objective.
[0005]
[Means for Solving the Problems]
The present invention can solve the above-mentioned problems by having the following configuration.
[0006]
(1) In a bending machine having an NC device, when the bending blade and the workpiece are interfered with each other based on the workpiece information and the predetermined information for executing the program input in advance to the NC device, The clearance consisting of the distance between the workpiece contact start point of the bending blade and the tip of the plate presser at the start of machining is set so as not to interfere with each other, and the bending edge of the bending blade is traced as the machining operation progresses. So that the final operation point of the bending blade at a predetermined bending angle of the workpiece to be processed is gradually increased to 4 to 6 times the plate thickness of the workpiece to be processed. A bending operation control device capable of controlling driving operations of an X-direction driving unit and a Y-direction driving unit that drive a bending operation unit composed of a normal bending blade and a reverse bending blade.
[0007]
(2) In a bending machine having an NC device, a step for inputting workpiece information of a workpiece to be processed and predetermined information for executing a program in advance to the NC device, and a bending blade and a workpiece based on these information The step to determine whether the workpiece interferes, and if it is judged to interfere, set the clearance consisting of the distance between the workpiece contact start point of the bending blade and the tip of the plate presser at the start of machining so as not to interfere with each other An X-direction drive unit that moves the cutting edge of the bending blade along the trajectory of the bending operation in accordance with the progress of the processing operation, and drives a bending processing unit composed of a normal bending blade and a reverse bending blade; controls the driving operation of the driving unit, wherein the work to be processed in the final operating point of the bending blade a predetermined bending angle of a workpiece while gradually expanding the clearance Bending operation control method characterized by comprising the steps of controlling the driving operation so that the 4 to 6 times the value of the thickness.
[0008]
(3) A storage medium storing a program for realizing the bending operation control method described in (2) above.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below.
[0010]
FIG. 1 is a block diagram showing a main part configuration of a bending operation control apparatus according to the present invention, FIG. 2 is a side view showing a main part configuration of a bending machine, and FIGS. 3 (a), 3 (b), and (c). ) Is a side explanatory view showing the progress of the bending operation, FIGS. 4 (a) and 4 (b) are explanatory views of clearance, bending blade dimensions, etc., and FIG. FIG. 6 is an explanatory diagram showing an example of interference, and FIG. 6 is a flowchart showing an example of the procedure of the machining operation.
[0011]
In the bending machine BM having the NC device 1, when performing a bending operation of the workpiece W gripped from above and below by the top die 7 a and the bottom die 7 b constituting the plate presser 7, an input unit is previously input to the NC device 1. The workpiece information (for example, material, plate thickness, required part dimensions, bending angle, etc.) of the workpiece W input using 4 and parameters for executing the program (specific values of the bending machine, mold for the plate thickness) When the workpiece W interferes with, for example, the positive bending blade 6b forming the bending blade and the workpiece W based on predetermined information such as the type of bending beam and the bending blade dimension of the bend beam) The clearance c, which is the distance between the workpiece contact start point of the positive bending blade 6b at the start of machining and the tip of the plate presser 7, is set below the standard clearance so as not to interfere with each other. As the operation progresses, the cutting edge of the regular bending blade 6b is moved along the trajectory of the bending operation, and at the final operation point of the bending blade at a predetermined bending angle of the work piece while gradually increasing the clearance c. The X-direction drive unit 2 drives the bend beam 6 along the X-direction guide 2a, and serves as a bending operation unit for operating the forward bending blade 6b and the reverse bending blade 6a so as to be the same as when the standard clearance is set. The drive operation of the Y-direction drive unit 3 and the like that are driven along 3a can be controlled.
[0012]
The NC device 1 includes a CPU 1-1, a calculation unit 1-2, a control unit 1-3, a storage unit 1-4, and the like. The CPU 1-1 can arbitrarily display the input unit 4 and various types of information. The bending machine BM is connected to the CPU 1-1 at the bend beam X direction driving unit 2 and the bend beam Y direction driving unit 3.
[0013]
The operation will be described with reference to the above-described configuration and FIGS. 3 (a), 3 (b), 3 (c), and FIG.
[0014]
In carrying out the bending operation, first, the CPU 1-1 of the NC apparatus 1 uses the input unit 4 such as a keyboard, for example, workpiece information such as material, plate thickness, required size of each part, bending angle, etc. and the uniqueness of the bending machine. Parameters for executing a program such as the value of the die, the type of the mold with respect to the plate thickness, and the bending blade size of the bend beam 6 (step S1), and based on these information, the positive bending blade 6b with a predetermined clearance. Is set, it is determined whether or not the regular bending blade 6b and the workpiece W interfere with each other (step S2). If YES is determined and the interference is determined, the process proceeds to step S3 and the clearance c at the start of machining is determined. Is set below the standard clearance, and then machining is started, the X-direction drive unit 2 is along the X-direction guide 2a, and the Y-direction drive unit 3 is along the Y-direction guide 3a. The control unit 1-3 of the CPU 1-1 in the NC apparatus 1 controls both operations, and the clearance c is gradually increased with the progress of the machining operation at the same time as the machining is started. The cutting edge is moved along the trajectory of the bending operation, and the driving operation of the normal bending blade 6b is controlled so that the final operation point of the bending blade at the predetermined bending angle of the workpiece W is not different from the standard clearance setting. When the predetermined bending angle is reached, the bending operation is finished.
[0015]
On the other hand, if it is determined in step S2 that the interference does not occur and NO, a standard clearance is set in the next step S6, then machining is started (step S7), and the normal bending is performed along the trajectory of the normal bending operation. When the cutting edge of the blade 6b is moved to reach a predetermined bending angle, the bending operation is finished (step S5).
[0016]
3 (a), (b), and (c), specifically, using numerals, the bending operation is started by setting the clearance c at the start of machining to 2t, which is smaller than 4t of the standard clearance. If, for example, the plate thickness is 0.8 t, then 4t−2t = 2t = 2 × 0.8 = 1.6 mm, and the bending blade dimension a does not have to be reduced by this amount.
[0017]
This number of 1.6 mm has a very large meaning as a bending blade dimension (bending mold tip dimension) of the bending mold.
[0018]
In the above-described embodiment, the description has been made mainly on the normal bending blade 6b. However, even when the reverse bending blade 6a is used, the same control as described above is performed as long as the similar conditions correspond to the reverse bending blade 6a. Can be done.
[0019]
【The invention's effect】
According to the present invention, the clearance at the start of machining can be made equal to or less than the standard clearance by providing the machining operation control for gradually increasing the clearance as the machining operation progresses without reducing the bending blade size. It is possible to perform bending without being restricted by the plate thickness, and it is possible to improve the processing function.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a main part configuration of a bending operation control device according to the present invention. FIG. 2 is a side view showing a main part configuration of a bending machine. FIG. 3 (a), (b), (c ) Is an explanatory side view showing the progress of the bending operation. [Fig. 4] (a) and (b) are explanatory diagrams of clearance, bending blade dimensions, etc. [Fig. 5] Standard clearance, bending blade and workpiece Explanatory drawing showing an example of interference [FIG. 6] A flowchart showing an example of processing operation procedure [Explanation of symbols]
1 NC unit 1-1 CPU
1-2 arithmetic unit 1-3 control unit 1-4 storage unit 2 X direction driving unit 2a X direction guide 3 Y direction driving unit 3a Y direction guide 4 input unit 5 display unit 6 bending processing operation unit (bend beam)
6a Reverse bending blade 6b Forward bending blade 7 Plate presser 7a Top die 7b Bottom die BM Bending machine a Bending blade dimension c Clearance W Workpiece workpiece x Flange dimension

Claims (3)

In a bending machine having an NC device, when the bending blade interferes with the workpiece based on the workpiece information of the workpiece inputted in advance to the NC device and predetermined information for executing the program, The clearance consisting of the distance between the workpiece contact start point of the bending blade and the tip of the plate presser is set so as not to interfere with each other, and the cutting edge of the bending blade is moved along the locus of the bending operation as the machining operation progresses. The positive bending blade is moved so that the final operation point of the bending blade at a predetermined bending angle of the work piece while gradually increasing the clearance is 4 to 6 times the plate thickness of the work piece. A bending operation control device capable of controlling driving operations of an X direction driving unit and a Y direction driving unit for driving a bending operation unit composed of a reverse bending blade. In a bending machine having an NC device, the workpiece information of the workpiece to be processed and predetermined information for executing the program are input to the NC device in advance, and the bending blade interferes with the workpiece to be processed based on the information. A step of determining whether to interfere, and a step of setting a clearance formed by a distance between the workpiece contact start point of the bending blade and the tip of the plate presser so as not to interfere with each other when it is determined that interference occurs. The X-direction drive unit and the Y-direction drive unit drive the bending operation unit including the normal bending blade and the reverse bending blade by moving the cutting edge of the bending blade along the trajectory of the bending operation in accordance with the progress of the processing operation. controls the driving operation, while gradually expanding the clearance becomes a predetermined bending angle of a workpiece the bend in the final operating point of the blade thickness of the processed workpiece Or bending operation control method comprising the steps of controlling the driving operation such that the 6 times the value.   A storage medium storing a program for realizing the bending operation control method according to claim 2.

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