JPH04266430A - Die device for hydraulic punch press machine - Google Patents

Abstract

PURPOSE:To properly adjust the vertical stroke of an upper die and also to reduce working cost by making the tip part of the upper die into a cone-shape, supporting a lower die with a holder and energizing the die upward. CONSTITUTION:The tip part 10 of the upper die (punch) 8 is formed into a piramid-shape. A fixed die 15 is fixed inside a die holder 11 and a movable die 12 is inserted. A coiled spring 13 is provided under the movable die 12. The tip part 10 of the punch 8 is brought into contact with a metal plate W, a hole is made on the metal plate W by immersing the bottom end of the tip part 10 of the punch 8 into the hole 12a of the movable die 12. When the punch 8 is further lowered, the movable die 12 is lowered against the spring force of the coiled spring 13. Thus, the metal plate W is downward deformed and the tapered part 10a in the tip part 10 of punch is brought into pressing contact with the metal plate W. The metal plate W is sheared with the tapered part 10a combined with the deformation of the metal plate W and punching work is executed on the metal plate W. This device can deal with the metal plates with various thicknesses by changing the stroke of the punch 8.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold device for a hydraulic punch press machine.

0002

2. Description of the Related Art Press machines such as mechanical presses and hydraulic presses are used as processing machines for drilling holes in plate materials. A press machine generally has an upper mold (punch) that can be raised and lowered, and a lower mold (die) that is disposed opposite to the upper mold (punch). During processing, a plate material is placed between a punch and a die, and by moving the punch up and down, the plate material is processed between the punch and the die.

[0003] In such a press machine, the clearance between the punch and the die must be adjusted depending on the thickness of the plate material. Therefore, it is necessary to prepare a plurality of dies for punches of the same diameter. As a result, there is a problem in that processing costs increase.

An object of the present invention is to provide a mold device for a hydraulic punch press machine that can reduce processing costs.

[0005]

[Means for Solving the Problems] A mold device for a hydraulic punch press machine according to the present invention includes an upper mold, a lower mold, a lower mold holder, and a biasing member. The upper mold has a conical tip and is movable up and down. The lower mold is arranged to face the upper mold. The lower mold holder is
It supports the lower mold so that it can be raised and lowered. The biasing member biases the lower mold upward.

[0006]

[Operation] In the present invention, during processing, a plate material is placed between the upper mold and the lower mold, and the upper mold is lowered. Then, the plate material is sandwiched between the conical tip of the upper mold and the lower mold, and when the upper mold is further lowered from this state, the lower mold is pushed downward against the biasing force of the biasing member. The plate material is deformed downward. As a result, the plate material is punched by the conical tip of the upper mold.

In this case, punching is performed using the conical tip of the upper mold, so by appropriately adjusting the amount of elevation (stroke amount) of the upper mold, punching can be performed on various plate materials with different thicknesses. can be done. Therefore, there is no need to prepare multiple molds for different plate thicknesses, and processing costs can be reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 shows a hydraulic punch press machine in which an embodiment of the present invention is adopted. In FIG. 3, this punch press machine 1 mainly includes a lower frame 2, an upper frame 3 disposed above the lower frame 2, and a throat section 4 that supports these at the rear.

A table 5 is arranged on the upper surface of the lower frame 2 on which a plate to be processed is placed. A carriage 6 is provided at the front end of the table 5 so as to be movable in the front-rear direction. A cross slide (not shown) is provided within the carriage 6 so as to be movable in the left-right direction. A work holder (not shown) for gripping a plate on the table 5 is attached to this cross slide.

[0010] The upper frame 3 is provided with an actuator 7 . This actuator 7 is for driving the lower punch 8 up and down. Further, a die device 9 is provided in the center of the table 5, facing the punch 8. These punches 8 and die device 9 constitute a processing section.

As shown in FIG. 1, the punch 8 has a tip end 1.
0 is formed into a square fiber shape. The die device 9 has a die holder 11 fixed on the table 5. The die holder 11 has a rectangular hole 11a formed in the center and a circular hole 11b formed above the rectangular hole 11a. A fixed die 15 is fixed in the hole 11b. The fixed die 15 has a hole 15a of the same size as the hole 11a. A movable die 12 is inserted into the hole 11a, and the movable die 12 can move up and down within the holes 11a and 15a. Further, a coil spring 13 is provided below the movable die 12.
is provided. The upper end of the coil spring 13 is the movable die 1
2, and the lower end is pressed against the table 5. The movable die 12 has a rectangular hole 12a in the center. Further, a plate presser 14 is provided around the punch 8. This plate holder 14 is intended to facilitate the removal of the punch inserted into the plate material during processing, and is designed to be able to move up and down together with the punch 8.

A control panel 15 is provided on the side of the throat portion 4 . A control section 20 as shown in FIG. 4 is arranged within the control panel 15. As shown in FIG. The control unit 20 includes a microcomputer including a CPU 21, a RAM 22, a ROM 23, and the like. Note that a table of punch stroke amounts preset according to the thickness of the plate material is stored in the RAM 22. The I/O port 24 of the control unit 20 includes a keyboard 25,
A tape reader 26, an actuator 7, a workpiece moving section 25 including a carriage 6, and other input/output sections are connected.

The punch press machine 1 described above is controlled by a control section 20 and operates as described below. Note that FIG. 5 is a control flowchart thereof.

When the main switch (not shown) of the punch press machine is turned on, initial settings such as setting the workpiece moving section 25 including the carriage 6 to the initial position are performed in step S1 of FIG. Next, in step S2, a work start command is awaited. If a work start command is input from the keyboard 25, the process moves to step S3. Step S3
Now, the machining program is read from the tape reader 26. Note that when reading this machining program, data regarding the thickness of the plate material to be machined is also read at the same time. Next, in step S4, the first command step of the machining program is read.

In step S5, it is determined whether the read instruction step is a plate material movement instruction. Otherwise, the process moves to step S6, and it is determined whether the command step is a machining command. Thereafter, in step S7, it is determined whether the command step is a command to perform other processing,
In step S8, it is determined whether all command steps of the machining program have been processed. If there are still command steps remaining, the process returns to step S4 to read the next command step.

If it is determined in step S5 that a plate movement command has been issued, the process moves to step S9. In step S9, while the workpiece on the table 5 is gripped by the work holder, the cross slide and the carriage 6 are moved in the left-right direction and the forward-backward direction, respectively, thereby moving the processing position of the workpiece toward the processing section.

If it is determined in step S6 that a machining command has been issued, the process moves to step S10. In step S10, the punch stroke amount corresponding to the sheet thickness data read in step S3 is read out from the RAM 22 and set. Next, step S1
1, the actuator 7 is driven and step S10
The punch 8 is lowered by the punch stroke amount set in . Then, the tip 10 of the punch 8 comes into contact with the plate W, the lower end of the tip 10 of the punch 8 sinks into the hole 12a of the movable die 12, and a hole is formed in the plate W. When the punch 8 is further lowered from this state, the coil spring 13
The movable die 12 descends against the spring force. As a result, the plate material W is deformed downward, and the punch tip 10
The tapered portion 10a is pressed against the plate material W. As a result, together with the deformation of the plate material W, the plate material W is sheared by the tapered portion 10a, and the plate material W is punched.

Now, let us assume that the stroke amount of the punch 8 is s. At this time, as shown in FIG.
The clearance with 5 is c. In this case, the size of the hole formed in the plate material W is determined by the diameter of the portion A of the punch tip 10. Note that when the plate material W is thick, the stroke amount is set to be smaller than s, and when the plate material W is thin, the stroke amount is set to be larger than s.

In this manner, by changing the stroke amount of the punch 8 according to the thickness of the plate, it is possible to handle plate materials of various thicknesses. This eliminates the need to prepare multiple dies for one punch, reducing processing costs.

[0020]

Effects of the Invention According to the mold device for a hydraulic punch press machine according to the present invention, processing is performed using an upper mold having a conical tip and a lower mold that can be raised and lowered, so that various plates can be molded. Can handle thick plate materials and reduce processing costs.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view of a mold device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram taken along the line II-II in FIG. 1;

FIG. 3 is an overall perspective view of a hydraulic punch press machine in which the above embodiment is adopted.

FIG. 4 is a schematic block diagram of a control section of the punch press machine.

FIG. 5 is a control flowchart.

[Explanation of symbols]

1 Hydraulic punch press machine 8 Punch 9 Die device 10 Conical tip 11 Die holder 12 Die 13 Coil spring

Claims (1)

[Claims] 1. A mold device for a hydraulic punch press machine for punching a supplied plate material, comprising: an upper mold having a conical tip and which can be raised and lowered; and an upper mold disposed opposite to the upper mold. A mold device for a hydraulic punch press machine, comprising: a lower mold having a lower mold, a lower mold holder that supports the lower mold in a vertically movable manner, and a biasing member that biases the lower mold upward.