JPH0123633Y2 - - Google Patents

Description

[Detailed description of the invention] In conventional sheet metal processing, in order to replace a punch die, as shown in Figs. A piston 3 is provided at the lower end of the cylinder 2.
A punch (male type) 6, whose upper end is supported by a restoring spring 5, is lowered into a side U-shaped holder 4, and a punch (male type) 6 is placed on a die (female type) 7 fixed to the lower side of the holder 4. When the object 8 is processed, the piston 3 is raised and the punch 6 is raised by the spring 5 in preparation for the next processing. If the vertical movement of the piston 3 is large, this process will take time, become inefficient, and become more dangerous (hands will be involved), so it is better to make the vertical movement as short as possible. Fourth
The figure shows the vertical movement interval 9 necessary for processing and the vertical movement interval 10 necessary for punch removal.
After machining, the piston 3 only needs to be raised by the distance 9. The biggest problem here is replacing the mold. Since there are a wide variety of workpieces to be processed, molds must be replaced quickly and safely at all times.

However, the only way to remove the punch 6 from the holder is to pull it out upwards as shown in Figure 3.
Therefore, the piston 3 must be raised each time by electric or screw operation until the punch 6 is removed. FIG. 3 shows the state in which the punch 5 is removed from the holder 4. After replacing the punch 6 of the mold, the punch 6 is lowered to the state shown in FIG. 1 just before the machining operation. In order to eliminate this inconvenience, the piston 3 is operated only in the interval 9 shown in FIG. 2 in the state shown in FIG. All you have to do is enter 10) in Figure 4. This is the liner of this invention.

The liner of this invention has an annular press mounting part 11 attached to the lower part of the piston 3 and a rod 12 projecting integrally from this, and a rod 12' parallel to the lower part of the upper rod is attached to the pin 13 at one end.
They are attached to each other so that they can rotate freely by inserting them. A liner 14 is placed on the other end of the lower rod 12' at a position that will later be below the press attachment part 11.
A flange portion 16 of the cylindrical portion 15 of the liner 14 is fixed to the inner side of the cylindrical portion 15. A fine adjustment screw portion 17 is screwed into the screw hole inside the cylindrical portion 15 of the liner 14, and a disc-shaped abutment is attached to the lower end of the screw portion 17. This is because the contact portion 18 is provided. Further, a fixing fitting 19 is screwed into the fine adjustment screw portion 17 from the outside of the cylindrical portion 15 . In addition, as shown in FIG.
Although there is a contact part 18, there are cases where there is no fine adjustment screw 17, and as shown in Fig. 7, a boss-like protruding insertion part is provided from the center of the piston mounting part 11 for use in the case of a crank press. In some cases. Further, a stopper 20 and a ball catch 21 protrude from the lower rod 12', and a recessed hole 22 is bored in the upper rod 12.

Since this idea is as described above, when using it for replacing molds in sheet metal press working, when the press attachment part 11 is attached to the piston 3 at the lower end of the cylinder 2, the rod 1 connected to the press attachment part 11 is attached.
2, the flange 16 of the liner 14 is located below the press attachment part 11 by the rod 12' connected by the rod 12 and the pin 13, and the cylindrical part 15 and the micro screw threaded inside the cylindrical part are connected. The abutting plate 18 at the lower end of the adjustment screw part 17 comes to abut against the upper end of the punch 6 supported by the restoring spring 5. Pressing was performed in this state, and the cylinder 2 was lowered and the press attachment part and liner 1 were attached to the piston 3.
4 (including the flange part, cylindrical part, screw part for fine adjustment, and the contact part at the lower end) descends, and the punch 6 is lowered against the restoring spring 5, and the workpiece 8 is moved between it and the die 7. It will be processed. When the machining is completed, the cylinder 2 and piston 3 are raised by a distance of 9, and the rod 12' of this invention is moved up.
When the liner 14 is removed from the position below the piston 3 by rotating it from below the upper rod 12 with the pin 13, the punch 6 is raised by the restoring spring 5,
It can be pulled out from the holder 4 and replaced with another punch 6. After the replacement is completed, rotate the rod 12' to the bottom of the rod 12 using the pin 13, and place the liner 1 under the press mounting part 11 of the piston 3.
4, and the flange 16 is below the press attachment part 11, and the lower end contact part 18 of the fine adjustment screw part 17 screwed onto the cylindrical part 15 is attached to the new punch 6.
Then, the cylinder 2 is lowered again and the workpiece 8 is machined.

As mentioned above, by using this idea, by installing a simple device, you can change the mold very quickly and easily and press work without moving the piston up and down to change the mold, just by moving the piston necessary for processing. It becomes possible to do so.

[Brief explanation of the drawing]

Figure 1 is a front view showing the before and after of conventional sheet metal processing.
Figure 2 is a schematic view of the work in progress with the cylinder in Figure 1 lowered, and Figure 3 is the cylinder being raised and the punch being removed from the holder and replaced.
Figure 4 is a schematic diagram showing the vertical spacing of the piston under the cylinder, which is necessary for conventional sheet metal processing, and the vertical movement interval required to remove the punch when replacing the mold. 1st embodiment, Fig. 6 shows a second embodiment of this invention, Fig. 7 shows a third embodiment of this invention, Fig. 8 is a front view of this invention installed in a sheet metal press processing machine, and Fig. 9 shows a FIG. 8 is a view of the liner of this invention shown in FIG. 8 being retracted laterally; In the figure, 11...Press mounting part, 12...Rod, 13...Pin, 14...Liner, 15...
Cylindrical part, 16... Flange part, 17... Screw part for fine adjustment, 18... Contact part, 19... Fixing metal fittings.

Claims (1)

[Scope of utility model registration request] In sheet metal press processing, one end of the two upper and lower rods is rotatably attached with a pin, the other end of the upper rod is provided with an attachment part to the piston, and the other end of the lower rod is attached with a liner. Punch mold replacement liner.