JPH11197896A - Sheeting method by punch press and ram oscillation device for punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheeting method by punch press capable of reducing a machining force and attaining low noise and also to provide a ram oscillation device for punch press. SOLUTION: In punching by raising/lowering a ram 3 that presses an upper die P or a lower die D, a controller 17 for controlling the position of the ram 3 instructs a position for oscillating the ram 3 based on the operating pattern generated by a ram operation pattern generating device 7. On the basis of this instruction, a corrugation superposing device 9 superposes the oscillated corrugation 25 generated by a superposed oscillated corrugation generator 11 on the operating pattern, so that punching is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet metal working method using a punch press incorporating vibration into an operation pattern of a ram and a ram vibration device of the punch press.

[0002]

2. Description of the Related Art A ram operation pattern in a conventional punch press sheet metal working machine has the following problems.
That is, (1) Since the processing capability of the punch press sheet metal processing machine has been determined, it is not possible to perform processing at a pressure exceeding this.

(2) The work has a lot of stress and the surface roughness of the machined surface is poor.

(3) Noise during processing is large.

(4) The molding processing time is long.

(5) Brittle material (glass epoxy plate, etc.)
The material is cracked by punching.

In order to solve such problems, for example, as shown in Japanese Utility Model Laid-Open Publication No. Sho 59-194328, vibration has been conventionally applied to caulking in a general-purpose press or the like. .

[0008]

However, in the prior art as described above, noise is generated because vibration is generated mechanically by rotating the eccentric plate. In addition, the size of the punch press machine is increased. Furthermore, since the vibration is generated with a constant waveform, the amplitude and the waveform are constant, and there is a problem that the vibration cannot be generated with the optimum vibration waveform corresponding to the thickness of the sheet or the type of processing.

SUMMARY OF THE INVENTION An object of the present invention is to pay attention to the above-described conventional techniques, and a method of processing a sheet metal by a punch press and a ram of a punch press capable of reducing a processing force and reducing noise. A vibration device is provided.

[0010]

According to a first aspect of the present invention, there is provided a sheet metal working method using a punch press, wherein a control device controls a position of a ram for pressing an upper die or a lower die. In a sheet metal working method using a punch press for punching a work in cooperation with an upper mold and a lower mold, a punching process is performed by vibrating the ram in a part of the operation pattern of the ram. Things.

Therefore, when performing the punching process by raising and lowering the ram pressing the upper die or the lower die, a desired position in the operation pattern for controlling the position of the ram is determined according to the material, the plate thickness and the processing conditions of the work. Then, punching is performed while vibrating the ram.

According to a second aspect of the present invention, there is provided a punch press ram vibrating apparatus which vibrates a ram pressing the upper or lower mold when performing punching work in cooperation with an upper mold and a lower mold. A ram vibrating device, comprising: a control device for controlling the position of the ram and instructing a position for vibrating the ram; a ram operation pattern generating device for generating an operation pattern of the ram; A superimposed vibration waveform generator that generates a superimposed vibration waveform to be generated, and a waveform superimposing device that superimposes the superimposed vibration waveform on the ram operation pattern at a position instructed by a command from the control device. It is assumed that.

Therefore, when performing a punching process by raising and lowering the ram for pressing the upper die or the lower die, the control device for controlling the position of the ram vibrates the ram in the operation pattern generated by the ram operation pattern generator. Then, the waveform superimposing device superimposes the superimposed vibration waveform generated by the superimposed vibration waveform generator on the operation pattern and performs punching based on the command.

According to a third aspect of the present invention, there is provided a punch press ram vibrating apparatus which vibrates a ram for pressing the upper or lower mold when performing punching work in cooperation with an upper mold and a lower mold. A ram vibration device, wherein a control device for controlling the position of the ram generates an operation pattern of the ram and instructs a position at which the ram is vibrated. Are superposed on each other.

Therefore, when performing the punching process by raising and lowering the ram that presses the upper mold or the lower mold, the control device:
A ram operation pattern is generated to control the position of the ram, and the ram is vibrated at a desired position in this operation pattern to perform punching.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a ram vibration device 1 for a punch press according to the present invention. Here, the punch press is well known from the prior art, so a detailed description thereof will be omitted. However, the punch press is a processing machine that punches the workpiece W in cooperation with the upper die P, the lower die, and the D. 5, the upper die P is pressed against the lower die D, and the work W positioned between the upper die P and the lower die D is punched.

Referring to FIG. 1, in the ram vibration device 1, a ram operation pattern generation device 7, a waveform superposition device 9, a superposition vibration waveform generator 11, a servo amplifier 13, an actuator 5, a position sensor 15, and a control device CN as
It has a C device 17 and the like. The CNC device 17 controls axes other than the ram 3 (not shown), selects a ram operation pattern in the ram operation pattern generation device 7, starts a press,
It controls the activation of the servo amplifier 13, the stop of the servo amplifier 13, and the like.

The ram operation pattern generator 7 generates a ram operation pattern and outputs a ram position command 19 and a superimposition signal 21. In this ram operation pattern, a piercing, cutting, and forming pattern is set as a ram position command 19. Further, the vibration is superimposed on a part of the ram position command 19 by the superimposition signal 21.

The waveform superimposing device 9 superimposes the ram position command 19 and the superimposed vibration waveform 25 from the superimposed vibration waveform generator 11 when the superimposed signal 21 which is a pulse waveform of the digital input is active, and superimposes the output 23 Occurs. When the digital input superimposition signal 21 is inactive, the ram position command 19 is output without superimposition. In this way, the vibration is superimposed only on a part of the ram position command 19 corresponding to the superimposition signal 21.

The superimposed vibration waveform generator 11 is controlled by the ram operation pattern generator 7 to generate a superimposed vibration waveform 25 having a frequency, amplitude, waveform, etc. corresponding to the material, plate thickness, ram operation pattern and the like of the work W. .

The servo amplifier 13 power-amplifies the superimposed output 23 to operate the actuator 5. When the actuator 5 operates, the position sensor 15 moves the position
Is converted to an electric signal and fed back to the servo amplifier 13 to form a position closed loop, thereby positioning the ram 3 with high accuracy. .

Next, the vibration of the ram 3 will be described with reference to FIG. As shown in FIG. 2A, the CNC device 17 instructs the ram operation pattern generation device 7 to generate a ram position command 19 and input it to the waveform superposition device 9. That is, for example, drilling / cutting patterns,
A ram position command 19 is generated for a forming pattern, a low noise drilling / cutting pattern, and the like.

On the other hand, the superimposed vibration waveform generator 11
A superimposed vibration waveform 25 as shown in FIG. 2B is constantly generated and is input to the waveform superimposing device 9. Also,
As shown in FIG. 2D, the CNC device 17 instructs the ram operation pattern generation device 7 to output the superposed vibration waveform 25.
A superimposed signal 21 which is a pulse waveform that becomes active at a position where superimposition is desired is generated and input to the waveform superimposing device 9.

The waveform superimposing device 9 includes a ram position command 19 for instructing the operation of the ram 3 from the above-described ram operation pattern generating device 7, a superimposed signal 21 indicating a position where the superimposed vibration waveform 25 is to be superimposed, and a superimposed vibration waveform. By superimposing the superimposed vibration waveform 25 from the generator 11, a superimposed output 23 for controlling the position of the ram 3 as shown in FIG. 2C is obtained.

The ram 3 is moved in accordance with the superimposed output 23 obtained as described above to perform punching.

From the above results, it is possible to reduce the punching force and forming force required for processing, prevent the occurrence of wrinkles due to punching, and improve the limit of deep drawing and the accuracy of the punched surface. Can be.

Further, the holding time for stabilizing the molding at the bottom dead center of the press becomes unnecessary, and the processing time can be shortened.

Further, the noise can be reduced with the reduction of the processing force.

Further, since the waveform of the operation pattern can be changed, for example, a rectangular wave can be used for cutting, and a sine wave can be used for molding, so that more efficient punching can be performed.

FIG. 3 shows a ram vibration device 29 of a punch press according to another embodiment. Note that portions common to the ram vibration device 1 according to the above-described embodiment are denoted by common reference numerals, and redundant description will be omitted.

In the ram vibration device 29, the CNC device 3
1, a servo amplifier 13, an actuator 5, a position sensor 15, and the like.

The CNC device 31 includes a ram 3 (not shown).
Other than axis control, selection of a ram operation pattern, activation of a press, activation of the servo amplifier 13, and stop of the servo amplifier 13. The CNC device 31 also generates ram operation patterns such as drilling, cutting, and forming, and outputs a ram position command 33 to the servo amplifier 13 by superimposing vibration on a part of these patterns.

With this configuration, the same effects as those of the ram vibration device 1 according to the above-described embodiment can be obtained.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.

[0036]

As described above, in the sheet metal working method by the punch press according to the first aspect of the present invention, the position of the ram is controlled when the ram for pressing the upper die or the lower die is moved up and down to perform punching. At a desired position in the operation pattern to be performed, according to the material of the work, the thickness and the processing conditions,
Since punching is performed while the ram is vibrating, the punching and forming forces required for processing can be reduced, wrinkles associated with punching can be prevented, and deep drawing limits and improved punching surface accuracy can be reduced. Can be achieved.
Further, a holding time for stabilizing the molding at the bottom dead center of the press is not required, and the processing time can be reduced. Further, noise can be reduced as the processing force is reduced.

In the ram vibration device for a punch press according to the second aspect of the present invention, a control device for controlling the position of the ram when performing the punching process by raising and lowering the ram for pressing the upper die or the lower die, comprises a ram operation pattern. A position for oscillating the ram in the operation pattern generated by the generator is commanded, and based on this command, the waveform superimposing device superimposes the superimposed vibration waveform generated by the superimposed vibration waveform generator on the operation pattern to perform punching. Therefore, it is possible to reduce the punching force and the forming force required for the working, prevent the occurrence of wrinkles due to the punching work, and improve the deep drawing limit and the accuracy of the punched surface. Further, a holding time for stabilizing the molding at the bottom dead center of the press is not required, and the processing time can be reduced. Further, noise can be reduced as the processing force is reduced.

In the ram vibration device for a punch press according to the third aspect of the present invention, when the ram for pressing the upper die or the lower die is moved up and down to perform punching, the control device generates a ram operation pattern to generate a ram operation pattern. In addition to performing position control, punching is performed by vibrating the ram at a desired position in this operation pattern, so that punching and forming forces required for processing can be reduced, and wrinkles associated with punching are generated. Is prevented, and the limit of the deep drawing and the accuracy of the punched surface can be improved. Further, a holding time for stabilizing the molding at the bottom dead center of the press is not required, and the processing time can be reduced.
Further, noise can be reduced as the processing force is reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a ram vibration device of a punch press according to the present invention.

FIGS. 2A to 2D are time charts showing an operation pattern of a ram, a waveform to be superimposed, a portion to be superimposed, and the like.

FIG. 3 is a block diagram showing a configuration of a ram vibration device of a punch press according to another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1, 29 Ram oscillation device 3 Ram 7 Ram operation pattern generator 9 Waveform superposition device 11 Superposition oscillation waveform generator 17, 31 CNC device (control device) P Upper die D Lower die W Work

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B30B 1/26 B30B 1/26 Z 15/00 15/00 A

Claims (3)

[Claims] 1. A sheet metal working method by a punch press in which a control device controls a position of a ram pressing an upper mold or a lower mold to perform punching work on a work in cooperation with an upper mold and a lower mold. Wherein the ram is vibrated in a part of the operation pattern to perform punching. 2. A punch press ram vibrator for vibrating a ram pressing said upper die or lower die when performing punching by cooperation of an upper die and a lower die. And a ram operation pattern generator for generating an operation pattern of the ram, and a superimposed vibration waveform generator for generating a superimposed vibration waveform superimposed on the operation pattern of the ram And a waveform superimposing device for superimposing the superimposed vibration waveform on the ram operation pattern at a position instructed by a command from the control device. 3. A ram vibration device of a punch press for vibrating a ram pressing said upper die or lower die when performing punching work in cooperation with an upper die and a lower die, wherein the position control of the ram is performed. The control device performs a command to generate a motion pattern of the ram and instruct a position to vibrate the ram, and superimpose a predetermined superimposed vibration waveform on the motion pattern of the ram at the commanded position. A ram vibration device for a punch press.