JPS6072700A - Spotting press machine - Google Patents

Abstract

PURPOSE:To provide a titled press machine which can surely and easily inspect the small ruggedness on the forming surfaces of both upper and lower dies by moving vertically at least either of upper and lower bolsters which support respectively the upper and lower dies and attaching and detaching repeatedly plural times the forming surfaces of both dies. CONSTITUTION:An upper bolster 5 which supports an upper die 6 via a ram 3 is attached to the piston rod 3 of a hydraulic cylinder 2 attached to the frame 1 of a press machine and is vertically moved by driving of a hydraulic pump 11 with respect to a lower bolster 7 which supports a lower die 8. A lifting selector valve 12 and a lifting speed selector 13 provided between said pump 11 and the cylinder 2 are controlled by an operating device 19 for setting provided with a device for applying vertical movement which is provided to a control box 18 to attach and detach repeatedly plural times the forming surfaces of the upper and lower dies 6, 8 at a low speed with low pressing force in the stage of spotting of the press machine constituted in the above-mentioned way. Even if the forming surfaces have small ruggedness, the presence or absence of such ruggedness is surely and easily inspected.

Description

[Detailed Description of the Invention] Technical Field This invention has an upper holster that supports the entire upper firefly mold, and a lower bolster that fully supports the lower mold, and by lowering the upper holster, the upper and lower molds can be set. The mold matching press is designed to inspect the entire molding surface of both molds.

Prior art-ff, in this type of mold matching press machine, the molding surface of either the upper mold or the lower mold is colored,
In this state, by pressing the upper mold against the lower mold and aligning the molds, the color is transferred to the non-colored molding surface according to the unevenness on the molding surfaces of both molds, and thereby the color is transferred to the molding surface on the non-colored side. It was designed to inspect the unevenness of the surface.

This mold matching is performed many times to gradually correct the molding surface. If the molding surfaces have large irregularities, a large impact load is applied multiple times between the molding surfaces during mold matching to remove the large irregularities. If only unevenness remains, it is not preferable to apply a large impact load. In other words, if a large impact load is applied, the mold may nod, making it impossible to accurately confirm small irregularities.

OBJECTS OF THE INVENTION It is an object of the present invention to provide an entire mold matching press machine that can reliably and easily inspect the presence of small irregularities on the molding surface.

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a method for repeating contact and separation between the molding surfaces of both molds multiple times by vertically moving at least one of the upper mold and the lower mold during mold matching. All of the vertical motion applying devices are provided to repeatedly apply pressure between the molding surfaces with a small pressing force.

Practical HIM Example An embodiment of this invention will be explained below with reference to all the drawings.
As shown in FIG. 1, a hydraulic cylinder 2 is provided in the machine frame 1 of the press machine, and a ram 4 is provided at the lower end of the piston rod 3.
The upper holster 5 is attached through the holster. An upper mold 6 is detachably mounted and supported on the lower surface of the upper bolster 5 with its molding surface facing downward. Further, below the upper holster 5 shown in FIG. 11, a lower bolster 7 is disposed on the machine frame 1 so as to be able to move up and down slightly. Its lower bolster 1
As shown in FIG. 2, a lower mold 8 to be matched with the lower mold 6 is removably mounted and supported on the upper surface of the mold with its molding surface facing upward. A cushion cylinder 9 is provided in the machine frame 1 below the lower holster 1, and its piston rod 10 corresponds to the lower surface of the lower holster 1.
It is designed to absorb a large impact applied to the lower mold 8.

A hydraulic pump 11 is connected to the hydraulic cylinder 2, and between the hydraulic cylinder 2 and the soil pump 11, a lifting speed switching device 13 such as an lifting switching valve 12 and an oil amount switching valve is provided. When the elevation switching valve 12 is switched in response to the excitation of the lowering solenoid 12a, pressure oil is supplied to the upper oil chamber of the hydraulic cylinder 2, and the upper S mold 6 is lowered, and the elevation switching valve 12 is the rising solenoid 12b1
7) When the switching operation is activated due to excitation, pressure oil is completely supplied to the lower oil chamber of the hydraulic cylinder 2 and the upper mold 6 is raised.

Also, when the lifting/lowering speed/summer switching device 13 described in B1 is switched, the amount of pressure oil supplied to the hydraulic cylinder 2 is changed, and the lifting speed of the upper mold 6 and the upper mold 6 relative to the lower mold 8 are changed. The setting of the pressing force can be changed. That is, in this embodiment, with the switching operation of the lifting speed switching device 13, the upper mold 6 moves at high speed from the highest point P17) of the upper stop position to the speed switching point P2, as shown in FIG. Lowering, low speed descending from the speed switching point P2 to the mold matching point P3 that matches the lower mold 8 or the lowest point set in advance, and at the mold matching point P3, pressurize the lower mold 8 with a small suppressing force, mold Between the matching point P3 and the rising point P4 of the repetitive operation, the lifting and lowering is repeated at low speed, and the pressure is repeatedly applied with a small suppressing force at 23 points, and from the lowest descending point or mold matching point P3 to the highest rising point P1, it is still fast. It is meant to be elevated.

On the other hand, as shown in FIG.
4 is provided, and a pinion 15 on its rotating shaft meshes with a rack 16 on the ram 4. The encoder 14 is activated as the upper mold 6 moves up and down, thereby detecting the position of the upper mold 6. In addition, a limit switch group 11 consisting of a plurality of limit switches is provided on the machine frame 1 in correspondence with the ascending and descending path of the ram 4, etc., and as shown in FIG. A safety limit switch 11a is shown as an example for sensing the entire situation and stopping the operation when the temperature rises.

Is there a control device on the side of the machine frame 1? An internal control box 18 is provided, in which a setting operation device 19 is installed. As shown in FIG. 4, the setting operation device 19 is provided with a keypad 20 and a setting value display panel 21, and the lowering speed of the upper mold 6 based on the highest point P1 can be determined by operating the keypad 20 on the keypad 20. Distance to the switching point P2, distance to the lowest point, distance from the mold matching point P3 to the rising point P4 in repeated operation, number of repetitions, and pressurization during the first descent of the lower mold 6 11fJ'i Each can be set, and the set values are displayed in the valley display sections 21a to 21e on the setting (II display panel 21).

Next, the FNI configuration of the control device will be explained with reference to FIG. 5. The CPU 22 constitutes a microcomputer together with the ROM 23 and the RAM 24, and a program for controlling the CPU 21 is written in the ROM 23. The RAM 24 stores data for controlling the order of the raising and lowering operations of the upper mold 6, and data such as distance, number of times, and time opening set by the setting operation device 19.

Also, when the 0PU 22 receives a position detection signal of the upper mold 6 from the encoder 14 etc. through the input port 25, it compares this with the setting data stored in the gRAM 24, outputs the signal from the output port 26, and outputs the signal from the output port 26. Lowering solenoid 12a
1, the full drive signal is appropriately output to the drive Igl path 27°28.29 of the ascending solenoid 12b and the ascending/descending speed switching device 13. Further, the CPU 22 outputs a stop signal etc. to the drive circuits 21 to 29 etc. even when a detection signal is input manually from the limit switch group 17. In this embodiment, especially based on the excitation control b, the upper mold 6 is moved up and down between points 23 and 24 shown in FIG. The contact motion with a small pressing force between the surfaces is repeated the set number of times.

Therefore, the operation of the mold matching press constructed as described above will be explained with reference to FIGS. 3 and 6.

Now, in this press machine, the upper mold 6 and the lower mold 8 are mounted and supported on the vertical holster 5I7, and the molding surface of one of the molds, for example, the lower mold 8, is colored, and a start switch (not shown) is attached. When the operation is started by an operation such as
A drive signal is output to the drive circuit 27, 29 according to the data of one beat, and the elevation switching valve 12 is switched to the descending state by the excitation of the descending solenoid 12a, and the elevation speed switching device 13 is switched to the high speed state. The lower mold 6 is lowered at high speed by the hydraulic cylinder 2 from the highest point P1 at the upper stop position (step ■ in FIG. 6).As the lower mold 6 is lowered, a position detection signal of the upper mold 6 is sent to the encoder 14 and the CPU 22. are sequentially input, and the detection signal is compared in the CPU 22 with the position data of the descending speed switching point stored in the RAM 24 (step ■), and the high-speed descending operation of the upper mold 6 continues until the two match. be done.

When the upper mold 6 reaches the set speed switching point P2 and the detection signal and the set position data match,
A switching signal is output from the CPU 22 to the elevation speed switching device 13 through the drive circuit 29ffi valve, and the switching device is switched to a low speed state, and the upper mold 6 moves to the speed switching point P2.
Then, the upper mold 6 is lowered at a low speed (step ■) to confirm the existence of the lower mold 8. In other words, the upper mold 6 is in contact with the lower mold 8, and the upper mold Type 5
stops in a pressurized state, and then, when the pressurized state continues for a certain period of time (1 second degree) (step ■), the CPU
22 is activated, the lifting solenoid 12b is energized by a switching signal from the CPU 22, and the lifting switching valve 12 is switched to the lifting state, and the lifting speed switching device 13 is switched to the low speed state, and the upper mold 6 is RAM
24' is the set increase amount of the repeated operation, for example, 5c.
It is raised at a low speed by the amount of IR (step ■). Then, when the upper mold 6 reaches the rising point P4 of the repetitive operation, CP
Based on the switching signal from the CPU 22, the lift switching valve 12 is switched to the lowering state, and the upper mold 6 is lowered at low speed from the rising point P4 (step ■). 13 is switched to the pressurized state, and the upper mold 6 is again pressed and joined to the lower mold 8 with a small suppressing force for 0.5 seconds, which is the same time as the rising time (step 2). The number of repeated pressurizations is counted by the 0PU22, and the counted number is compared with 1 (1) and the set number of repetitions stored in the AM24 (Step 2).
), when the number of counts reaches the set number of times, ■−■−■−
The operation of ■ is repeated.

As described above, when the upper mold 6 is repeatedly lowered, raised, and operated a predetermined number of times, the elevation switching valve 12 is switched to the ascending state by a switching signal from the CPU 22, and the elevation speed switching device 13 is switched to a high speed state, and the upper mold 6 is raised from point 23 at high speed (
step [phase]]. Even during this increase, the CPU22
The position detection signal from the encoder 14 and the origin position data of the highest point P1 from the RAM 24 are compared (to step), and the upper mold 6 continues to rise at high speed until the two match. 6 reaches the highest point P1, C
A stop signal is output from the PU 22 to the drive circuits 27 to 29, etc., and the operation is stopped.

Note that when the lower mold 8 does not exist on the lower bolster 7 and the upper mold 6 reaches the predetermined lowest point below the mold matching point P3 (step ■), the signal from the encoder 14 is Output) The CPU 22 determines all of them,
Similarly to the end of the repeated pressurization, the ram 4 is raised at high speed.

In this way, in the press machine of this example, the molding surface of the upper mold 6 is repeatedly pressed against the molding surface of the lower mold B multiple times with a small pressing force. Due to the unevenness of the small convex surface on the molding surface, the coloring applied to the molding surface of the upper mold 6 is transferred to the molding surface of the lower mold 8, and both molds are tilted. It is possible to accurately inspect the fine irregularities on the molding surface in steps 6 and 8.

Note that the present invention is not limited to the configuration of the embodiment described above; for example, instead of the m-child control device of the embodiment described above,
Any method may be used without departing from the spirit of the invention, such as by employing a sequence control device including a limit switch, timer, etc., or by repeatedly raising and lowering the lower mold to repeatedly weld both molds. You can make it concrete by changing it to .

Effects of the Invention As detailed above, the present invention has the excellent effect of being able to reliably and easily inspect the presence or absence of small irregularities when the molding surface has small irregularities.

[Brief explanation of drawings]

Fig. 1 is a front view schematically showing the structure and hydraulic circuit of a mold matching press embodying the present invention, Fig. 2 is a partial cross-sectional view showing an enlarged view of the state in which both molds are aligned, and Fig. 3 4 is an enlarged plan view showing a part of the setting operation device, FIG. 5 is a circuit diagram showing the circuit configuration of the control device, and FIG. The diagram shows the operation of the upper *type?
It is a flow chart for explanation. Hydraulic cylinder 2, upper holster 5, upper mold 6, lower holster 7, lower mold 8, elevation switching valve 12, encoder 1
4, Setting operation device 19.0 PU22, 几0M23, 几A
M24 (These 22 to 24 etc. constitute a vertical motion imparting device. Patent applicant: Nagase Iron Works Co., Ltd. Patent attorney Hironobu Onda

Claims (1)

[Claims] It has an upper holster (5) that supports the upper mold (6) and a lower holster (1) that fully supports the lower mold (8).
, 8Jk In a mold matching press machine that aligns the molds and inspects the molding surfaces of both molds (6, 8), at least the lower mold (6) and the lower mold (8) are inspected during mold matching. Vertical motion imparting device (22) for repeating contact and separation between the molding surfaces of both molds (&, 8) multiple times by vertically moving one
-24 etc.) - A mold matching press machine.