JPH1133643A - Method and device for controlling forming die in punch press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the set up work of adjustment/change of a die when changing a material/plate thickness of a work to be worked by generating the detail setting data irrelevant to a material/plate thickness of a work to be worked for respective press motion number and the detail setting data to be changed and conducting drive control of a press based on these. SOLUTION: Material data and plate thickness data are stored in a material memory part 23 and a plate thickness memory part 24. A press motion number corresponding to these data and a die number is stored in a press motion setting value memory part 26 and a press motion setting value memory part 27 for respective material/plate thickness. By referring to the press motion number corresponding to a mounted die in working, the detail setting data irrelevant to a material/plate thickness for respective number and the detail setting data to be changed by material/thickness are generated in a press drive data preparation processing part 30. Press drive control is conducted by a press drive control part 31 based on these data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for controlling a molding die in a punch press.

[0002]

2. Description of the Related Art In a punch press such as a turret punch press, when a plate-shaped work is formed using a forming die such as a half-shear die, the material and thickness of the work are reduced. Since it is necessary to change the processing height in accordance with the above, the following method has conventionally been adopted. In the case of a punch press machine that mechanically moves the ram up and down in the press section, the stroke length of the ram is fixed. The test hitting is performed by a method of changing the position of the bottom dead center of the tip of the mold by adjusting the screw of the head portion of the mold while observing the actually formed processing shape. In the case where the press unit is driven by a hydraulic punch press machine and has a control system that sets one press motion for each molding die, the same as above without changing the press motion In addition to the method of adjusting the mold, there is a method of changing the data set value of the press motion every time the material / plate thickness changes. However, in this case, it is necessary to use a mold that can cope with a change in the press stroke operation. In the case where the amount of press stroke is changed within a certain appropriate range, there is a method in which a plurality of dies for performing the same molding process are prepared, and the dies are selectively used for each material and plate thickness.

[0003]

However, each of the above-mentioned conventional methods has the following problems. In the production where the material and plate thickness are changed, it is necessary to adjust the mold and confirm the trial hitting each time, and the productivity does not increase. In a hydraulically driven punch press machine, changing the set value of the press motion can save the labor of adjusting the mold and confirming the trial run.However, automatic operation and continuous operation linked with a material supply device etc. When the material and plate thickness change during operation, manual press motion change work by the operator is required. As a method of avoiding the above problems, there is a method in which dies for performing the same molding process are adjusted for each material and plate thickness, and each of these dies is mounted on a punch press to operate. However, in this method, it is necessary to prepare a plurality of dies, which increases the cost. In addition, since turrets and magazines that store dies are used more than necessary, when performing continuous operation based on a production plan, all dies required for continuous operation cannot be stored, and The production schedule for continuous operation must be reduced or shortened. In the case where the press stroke amount is changed within a certain appropriate range, it is necessary to prepare as many dies as the number required for the forming process, and the same problem as described above occurs.

The present invention has been made in order to solve such a problem. Even if the thickness or the material of a workpiece to be processed is changed, setup such as adjustment and replacement of a mold is performed. An object of the present invention is to provide a control method and a control device for a molding die in a punch press machine that can perform a desired molding process with one die without requiring any operation.

[0005]

In order to achieve the above-mentioned object, a method of controlling a molding die in a punch press according to the present invention provides a method of controlling a molding die in accordance with a stroke amount. A method of controlling a forming die in a punch press machine for forming a work using a changeable forming die, the press motion corresponding to material data, plate thickness data and a mold number of the work. In addition to storing the numbers, for each press motion number, detailed setting data of the press motion irrelevant to the material and thickness of the workpiece, and detailed setting data of the press motion to be changed according to the material and thickness of the workpiece Is stored, and at the time of machining, the press motion number corresponding to the mounting die is referred to.
Generate detailed setting data of the press motion irrespective of the plate thickness and detailed setting data of the press motion to be changed according to the material and plate thickness of the workpiece, and perform the drive control of the press based on the generated data. It is a feature.

Further, in order to realize this control method more specifically, a control apparatus for a molding die in a punch press according to the present invention is capable of changing a molding amount of a workpiece according to a stroke amount. A control device for a forming die in a punch press machine for forming a work using a die, wherein (a) a material for storing material data and plate thickness data of the work read from a processing program, respectively. A memory section and a sheet thickness memory section, (b) a mold information memory section for storing a press motion number corresponding to a mold number in a machining program, and (c) a material and a sheet thickness of a workpiece for each press motion number. A common data memory section for storing detailed setting data of the press motion irrelevant to (d)
A change data memory unit for storing detailed press motion setting data to be changed according to the material and plate thickness of the workpiece for each press motion number; and (e) a mounting die from the mold information memory unit during processing by the processing program. Referring to the press motion numbers corresponding to the molds, for each of the press motion numbers, detailed setting data of the press motion irrespective of the material and thickness of the workpiece is generated from the common data memory unit, and the change data memory is generated. A press drive data generating unit for generating detailed setting data of a press motion to be changed according to the material and plate thickness of the workpiece from the unit; and (f) press drive control based on the drive data generated by the press drive data generator. And a press drive control unit for performing the following.

In the present invention, a molding die capable of changing the molding amount of a workpiece in accordance with the stroke amount is used. When the automatic operation using the molding die is performed, the molding program is described in a machining program. The material data is stored in the material memory unit, and the sheet thickness data is stored in the sheet thickness memory unit. After this processing, the following processing operations are sequentially performed according to the instructions of the machining program. First, when a molding die is mounted on the press unit by a die exchange command of a processing program, the corresponding die number stored in the die information memory unit is based on the mounted die number data. Search
The press motion number data based on this mold number is referred to and transferred to the common data memory section and the changed data memory section. The common data memory section transfers the detailed set value of the corresponding press motion number to the press drive data generation section based on the transferred press motion number data, and the changed data memory section stores the transferred press motion number data in the transferred press motion number data. Based on the data of the material memory section and the data of the board thickness memory section, the corresponding set value data is transferred to the press drive data generating section based on the retrieved material / board thickness data. Next, in the press drive data generation unit, the press shaft is actually driven based on the data transferred from the common data memory unit and the change data memory unit and the thickness data stored in the thickness memory unit. Create data for
Then, in the press drive control unit, the punch shaft or the die shaft is driven by a punch operation command based on the created data, and a required forming process is performed.

According to the present invention, even if the material or plate thickness of a workpiece to be processed is changed, setup work such as adjustment and replacement of a mold is not required, and desired molding can be performed with one mold. Processing can be performed. In this way, even in the production in which the material and the plate thickness of the workpiece change, the adjustment of the mold and the confirmation of the trial hitting become unnecessary, and the productivity can be improved. In addition, even if the material or thickness changes during automatic operation or continuous operation in conjunction with the material supply device, the operator does not need to manually change the press motion, so unmanned and labor-saving operation is possible. And productivity can be improved. Further, unlike the conventional method in which a mold for performing the same molding process is adjusted for each material and plate thickness, and the mold is mounted on a punch press and operated, the mold is mounted on the punch press. Since the number of turret stations is one, and other dies can be mounted on the surplus stations, it is possible to reduce the number of setups and to expect higher productivity. In addition, there are various advantages such that the number of dies for performing the same molding process can be reduced, so that a reduction in running cost can be expected.

In the control device of the present invention, there is further provided a data changing means for externally correcting and changing each data in the thickness memory section, the mold information memory section, the common data memory section and the changed data memory section. Is preferred.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of a method and apparatus for controlling a molding die in a punch press according to the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are sectional views of a molding die according to an embodiment of the present invention. Here, FIG. 1 shows a state before the forming process, and FIG. 2 shows a state after the forming process ((b) is a partially enlarged view).

This embodiment is applied to a case where a downward half shear forming process is performed. The mold 1 used for the forming process includes a punch (upper mold) 2, a stripper (punch plate) 3 attached to the punch 2, and a die (lower mold) 4.

The punch 2 is a punch chip 5 having a required shape.
And a punch holder 6 for holding the punch chip 5 are integrally connected by bolts 7, and a transfer punch ring 8 is fitted and fixed over the entire outer periphery of the base of the punch holder 6. It has a structure. The stripper 3 is fitted to the punch 2 from below and is slidably supported up and down. An elastic body 9 such as urethane serving as a cushion is interposed between the upper surface of the stripper 3 and the lower surface of the punch holder 6. on the other hand,
The die 4 has a die body 10 and a die plate 11 holding the die body 10 integrally connected by bolts 12, and a die adapter 13 is fitted over the entire outer periphery of the die body 10. The structure is fixed. A die ejector 14 is supported in the die body 10, and the die ejector 14 and the die plate 11 are supported.
Again, an elastic body 15 such as urethane serving as a cushion is interposed between these.

When the workpiece W is inserted between the punch 3 and the die 4 by using such a mold 1 and the punch axis and the die axis are driven, the lower surface of the stripper 3 is After coming into contact with the surface, the elastic body 9 contracts within a clearance a (for example, 3.5 mm) between the upper surface of the stripper 3 and the lower surface of the punch holder 6, and the tip of the punch chip 5 projects from the lower surface of the stripper 3. At the same time, the elastic body 1 on the die 4 side
5, the die ejector 14 is immersed in a required amount from the surface of the die main body 10, whereby a desired half shear forming process (half piercing process) is performed. As described above, when the mold 1 as in this embodiment is used, by changing the stroke amount of the punch 3 in accordance with the thickness of the workpiece W as a processing target, the processing height, in other words, the forming processing amount is reduced. It can be changed arbitrarily within the range of the clearance a.

Next, referring to FIGS. 3 to 6 and Tables 1 to 3 for specific contents of control of the punch shaft and the like when the material and the plate thickness are changed using the above-described mold 1. I will explain it. FIG. 3 is a system configuration diagram of the control device of the present embodiment, and FIG. 4 shows a machining program used for this control.

In this machining program, the head portion describes the material and thickness of the workpiece W to be machined by the machining program. The mold for processing is a T-code (shown as “T602” in the example of FIG. 4).
In the automatic operation, the designated die corresponding to the T code is mounted on the press unit. In addition, as a method of attaching a mold to the press section, a method using a generally known turret or an ATC
(Automatic mold changing device) may be used.

Table 1 shows an example of mold information (mold profile) based on a mold number (T001, T002,...) Represented by a T code for each mold. Have been. The mold information includes the type (punching, molding, engraving, etc.) and shape (round, square, long angle, burring, upper half shear, etc.) of the mold assigned to the mold number.
And the long side (diameter), short side (pitch), radius (height), etc. representing the size processed by the mold, as well as the press motion number of the mold Is set. These pieces of information are stored in the mold information memory unit 25 (see FIG. 3) in the control device.
These pieces of information are registered in advance for the dies used in the machining program before the automatic operation is performed. In addition, each data can be corrected and changed from outside by a data changing means (not shown) in case of newly registering or deleting a mold.

[0018]

[Table 1]

FIG. 5 shows an example of a screen display for making detailed settings of the press motion. This example shows a press motion of press motion number 15, and indicates that this press motion is a setting for upward half shearing. Here, as the detailed setting values of the press motion, each data such as the punch standby position, the punch lowering speed, the die raising speed,... -10. Is set for each item.

In the example shown in FIG. 5, not only a punch but also a punch press with a die elevating device is used, and the punch is positioned on the upper surface of the workpiece W as shown in the figure. In this state, the die rises and moves to process the workpiece W upward.

FIG. 6 shows an example of a press motion detailed setting screen display for downward half shearing. In this example, the punch moves down in a state where the die is positioned on the lower surface of the workpiece W, and makes a movement for processing the workpiece W in the downward direction. Note that, also in this example, the detailed setting values of the press motion are the same as those in FIG. -10. Is set for each item.

Table 2 shows a state where the detailed set values of the press motion described above are stored in the press motion set value memory section (common data section) 26 in the control device. It is necessary to register the information relating to the detailed set values of the press motions in advance for the dies used in the machining program before performing the automatic operation. In addition, similarly to the data according to Table 1, the data according to Table 2 can be modified and changed in preparation for a new registration or deletion of a mold.

[0023]

[Table 2]

On the other hand, Table 3 shows an example of a data structure set for each material and plate thickness of the workpiece W. In the present embodiment, data for correcting the forming position of the press motion data for each material and plate thickness is given, and in the case of the aforementioned press motion number and the press motion of the forming process (for example, motion number 15 or 16), Only one piece of correction data for each material and plate thickness is prepared. The detailed set values are stored in a press motion set value memory section (change data section) 27 in the control device. The data for each material and plate thickness of the press motion also need to be registered in advance before the automatic operation is performed.
In this case, similarly, the data can be corrected or changed in preparation for a new registration or deletion of a mold.

[0025]

[Table 3]

Next, a processing procedure in the control device will be described with reference to FIG.

1) The machining program (see FIG. 4) is stored in the machining program storage unit 21. When the automatic operation is performed, the machining program is read by the machining program reading unit 22 and described at the beginning of the machining program. The material data and the thickness data stored are stored in the material memory unit 23 and the thickness memory unit 24, respectively. The machining program reading unit 22 also checks whether or not the mold used in the machining program has been registered and stored in the mold information set in the control device.

2) After the processing in the machining program reading section 22 has been completed, the machining program includes a numerical operation section (NC)
The data is transferred to an automatic operation memory unit 28 of the apparatus, and the numerical operation unit 28 sequentially performs a processing operation in accordance with a command of a machining program.

3) A downward half-shear mold (see Table 1) is mounted on the press unit in accordance with a mold exchange command (T code = T602) in the machining program. The mold number data mounted on the press unit is transferred from the numerical operation unit 28 to the press unit mounted mold number register 29. At this time, the method of mounting the mold may be a method using a turret or a method using an ATC device.

4) The corresponding mold number stored in the mold information memory section 25 is searched and referred to by the mold number written in the press section mounted mold number register 29, and the press based on the mold number is performed. The motion number data is transferred to a press motion set value memory section (common data section) 26 and a press motion set value memory section (change data section) 27 for each material and plate thickness. In this example, the die information memory unit 25 identifies the corresponding die as having a press motion number of 16 based on the T code of T602. At this time, not only the press motion number but also the type and shape data are stored in the press motion set value memory section (common data section) 26 and the press motion set value memory section (change data section) 27 in order to ensure more accurate collation. May be forwarded to

5) The press motion set value memory section (common data section) 26 stores, based on the press motion number, detailed set values of the corresponding press motion number (Table 2).
Are transferred to the press drive data creation processing unit 30. In this example, data 1 to data 10 of the press motion number 16 are transferred.

6) The press motion set value memory section (change data section) 27 retrieves the corresponding material / thickness data based on the press motion number, and stores the data in the material memory section 23 stored in 1) above. The corresponding set value data is transferred to the press drive data creation processing unit 30 according to the data and the data in the thickness memory unit 24. In this example, since the material is SPC and the plate thickness is 1.2 mm, data of +0.53 is transferred to the press drive unit data creation processing unit 30 from the setting data in Table 3. At the same time, the corresponding material correction value data is transferred to the press drive data creation processing unit 30 based on the material data. Here, the data of the material correction values shown in Table 3 (all are +0.00 in this example) further corrects the corresponding correction data values of the material and plate thickness. It is a value that can be multiplied. This is because considering the correction data for each material when the sharpness of the mold becomes worse during use, the sharpness changes once the material / thickness set value is set. When individual changes are made at the time of coming, when the sharpness is improved by mold polishing work, the previous set value can not be understood and it is prepared to save the trouble of having to repeat the trial work to set it again. Is what it is.

7) The press drive data creation processing section 30
Based on the data transferred in the above 5) and 6) and the thickness data stored in 1), data for actually driving the press shaft is created. In this example, since the data corrected by the material and plate thickness is only the molding position, the other data is data 1 to data 6 of the detailed press motion setting value.
And data 8 to data 10 are used as they are. The punch forming position is corrected as follows. In other words, the press drive unit controls the origin (0 point) for both the punch axis and the die axis.
Is set to the pass line (the lower surface of the workpiece W), the upper surface position of the workpiece W can be known based on the information of the plate thickness data. Further, the press motion for forming from the upper surface of the workpiece W into the workpiece W is performed by the data 7 (punch molding position) of the detailed setting value of the press motion number in the press motion set value memory section (common data section) 26. The position (forming position) can be known. Furthermore, press motion set value memory section (change data section)
The molding position taking into account the correction value data for the material and plate thickness from No. 7 can be known, and the molding position taking into account the correction data of the material correction amount can also be known. The data created by these processes is transferred to the press drive control unit 31.

8) The press drive control unit 31 moves the punch shaft and the die shaft based on the punch operation command from the numerical operation unit 28 with the data created in the above 7) to perform the half-shear forming process. The numerical control unit 28 controls the hydraulic drive of the press unit, and also controls the X-axis / Y-axis motor control unit 32 for moving and positioning the workpiece W in the X-axis direction and the Y-axis direction. .

According to the present embodiment, even if the material and the thickness of the workpiece W are changed, setup work such as adjustment and replacement of the mold is not required, and the desired molding process can be performed with one mold. It can be performed. Accordingly, productivity can be improved, and the number of dies for performing the same molding process can be reduced, so that a reduction in running cost can be expected.

In the present embodiment, the method of correcting the molding position for each material and plate thickness has been described, but the molding time and other data may be corrected.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view (before molding) of a molding die according to one embodiment of the present invention.

FIGS. 2A and 2B are cross-sectional views (after molding) of a molding die according to an embodiment of the present invention, and FIGS. 2A and 2B are partially enlarged views of FIG.

FIG. 3 is a system configuration diagram of a control device of the present embodiment.

FIG. 4 is a diagram showing a machining program used for control.

FIG. 5 is a diagram illustrating an example of a screen display for performing detailed setting of a press motion.

FIG. 6 is a diagram showing an example of a press motion detailed setting screen display for downward half shearing processing.

[Explanation of symbols]

Reference Signs List 1 die 2 punch (upper die) 3 stripper (punch plate) 4 die (lower die) 5 punch chip 6 punch holder 7 bolt 8 punch ring 9 elastic body 10 die body 11 die plate 12 bolt 13 die adapter 14 die Ejector 15 Elastic body 21 Processing program storage section 22 Processing program reading section 23 Material memory section 24 Sheet thickness memory section 25 Die information memory section 26 Press motion set value memory section (common data section) 27 Press motion set value memory section (changed) Data part) 28 Numerical calculation part (Automatic operation memory part of NC device) 29 Die number register for press part 30 Press drive data creation processing part 31 Press drive control part 32 X-axis / Y-axis motor control part W Workpiece

Claims (3)

[Claims] 1. A method for controlling a forming die in a punch press machine for forming a work using a forming die capable of changing a forming amount of the work in accordance with a stroke amount, comprising: In addition to storing the material data and plate thickness data of the workpiece and the press motion number corresponding to the mold number, detailed setting data of the press motion irrespective of the material and plate thickness of the workpiece, for each press motion number, The detailed setting data of the press motion to be changed according to the material and plate thickness of the workpiece are stored. At the time of machining, the press motion number corresponding to the mounting die is referenced, and for each press motion number, the workpiece Generates detailed press motion setting data irrelevant to the material and thickness of the workpiece and press motion detailed setting data that changes according to the material and thickness of the workpiece. The method of the molding die in the punch press, characterized in that for controlling the drive of the press on the basis of the data. 2. A control device for a forming die in a punch press machine for forming a work by using a forming die capable of changing a forming amount of the work according to a stroke amount, a) a material memory section and a sheet thickness memory section for storing the material data and the sheet thickness data of the workpiece read from the processing program, respectively, and (b) a metal for storing a press motion number corresponding to a mold number in the processing program. A mold information memory unit, (c) a common data memory unit for storing detailed press motion setting data irrespective of the material and thickness of the workpiece for each press motion number, and (d) a workpiece for each press motion number. A change data memory section for storing detailed setting data of a press motion to be changed according to the material and plate thickness of the object; and (e) the die during processing by the processing program. The press memory number corresponding to the mounting die is referred from the information memory unit, and detailed press motion setting data irrespective of the material and plate thickness of the workpiece is generated from the common data memory unit for each press motion number. A press drive data generation unit for generating detailed setting data of a press motion to be changed according to the material and thickness of the workpiece from the change data memory unit; and (f) the drive data generated by the press drive data generation unit. A control device for a molding die in a punch press machine, comprising a press drive control unit for performing drive control of a press based on the press drive control unit. 3. The apparatus according to claim 2, further comprising a data changing means for externally correcting and changing each data in said thickness memory section, mold information memory section, common data memory section and changed data memory section. Control device for molding dies in punch press machines.