JPS6238059B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an upper and lower split die closed forging device.

Conventional forging equipment uses hydraulic presses, but this requires (1) a large hydraulic press, which inevitably requires a pump unit with a large capacity, resulting in a large waste of energy; There were problems such as () slow speed and (3) complicated equipment and high cost.

The present invention improves these problems and aims to (1) reduce the overall size, (2) enable higher speeds, (3) further improve operability, and (4) reduce costs. (5) To enable unitization of molding equipment.

The present invention that achieves this objective is summarized as follows. In other words, (1) a small-diameter hydraulic cylinder is installed to close the vertically divided mold, (2) locking and precompression of the mold are performed by the hydraulic cylinder and wedge, and (3) an upper punch. (4) By doing the above, compared to the large locking force required to close the mold, It is characterized by the fact that a punching force that requires a small target pressure is generated by a group of small diameter cylinders, and a compact molding device is formed to save energy.

Examples will be described below. In Figure 1,
1 is an upper punch pushing cylinder, and 2 is a frame of a forging device. 3 is an upper punch pushing piston rod for pushing the upper punch 4; 5 is an upper punch return spring for returning the upper punch 4;
It is installed around the piston rod and between the upper mold and the tip of the piston rod.

7 is a lower die, and 8 is a material to be forged. 10 is a lower punch, and 11 is a lower punch return spring, which is installed around the lower punch 10 and between the lower die 7 and the lower punch pushing piston rod 12.

9 is a slide; 15 is a cylinder for pushing up the slide 9; 13 is a wedge, and 14 is a cylinder for pushing the wedge 11 from the side.

Now, when the slide 9 is raised by the slide push-up cylinder 15, the lower mold 7 comes into contact with the upper mold 6 as shown in FIG. 2, and both form a closed mold.

Next, the wedge 13 is laterally pushed into the lower surface of the slide 9 by the wedge pushing cylinder 14, and the slide 9 is locked. At the same time, the lower mold 7 is pressed against the upper mold 6 and undergoes precompression.

Next, the upper punch pushing cylinder 1 is operated and the piston rod 3 pushes the upper punch 4 into the material 8.
The lower punch piston 12 built into the slide 9 is
Push the lower punch 10 toward the material 8 from below. Then, the material 8 is compressed, spreads laterally, and tries to protrude outside the mold, but since the mold is precompressed by the wedge 13, there is no gap between the lower mold 7 and the upper mold 6. The material 8 remains in the mold, fills the mold cavity under its own pressure, and is forged.

In the forging device configured as described above, (1) The slide push-up cylinder 15 used to close the mold may have a diameter of about 100 mm, but in a conventional 800-ton hydraulic press, the diameter is as much as 600 mm.

(2) In order to apply 800 tons of precompression to the mold, the wedge pushing cylinder 14 must have a diameter
Approximately 150mm is sufficient.

(3) Since the punch stroke is small, both the upper punch cylinder 1 and the lower punch piston 12 need only have small strokes.

(4) Compared to a normal hydraulic press, the total amount of oil required to perform the same processing is approximately 1/6, allowing for significant energy savings. Also, the capacity of the pump motor can be reduced to about 1/3.

(5) Since the diameter of the stroke cylinder 15 is small, it is possible to increase the speed, and there is an advantage that the production tact can be shortened.

As explained above, it was possible to obtain an upper and lower split die type closed forging device that has a simpler and more compact mechanism than a conventional forging device that uses a hydraulic press.

Furthermore, by combining a plurality of devices and a handling device, it was possible to obtain the above-mentioned rational molding system.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a state in which the upper and lower molds of the forging device are open. FIG. 2 is a cross-sectional view of the forging device in a state where precompression is applied. FIG. 3 is a cross-sectional view of the completely closed state. In the figure; 1... Upper punch pushing cylinder,
2... Frame, 3... Upper punch push-in piston rod, 4... Upper punch, 5... Upper punch return spring, 6... Upper mold, 7... Lower mold, 8...
Material, 9...Slide, 10...Lower punch, 11
...Lower punch return spring, 12...Lower punch push-in piston rod, 13...Wedge, 14
...Cylinder for pushing wedges, 15...Cylinder for pushing up slides.

Claims (1)

[Claims] 1 The upper punch is pushed into the upper mold by the upper punch pushing cylinder provided at the top of the frame, the slide is pushed up by the slide pushing cylinder, and the cylinder provided inside the slide It is characterized by comprising a lower punch that is pushed up inside the lower mold at the top of the slide, and a wedge that is pushed into the bottom of the slide by a wedge pushing cylinder when the slide is pushed up and locks the slide. Upper and lower split mold closed forging equipment.