JPS60223632A - Die set for closed forging - Google Patents

Abstract

PURPOSE:To provide a titled die set which can form smoothly a product having asymmetrical shape by constituting said die set so that a material is supplied into hermetically closed dies formed by joining upper and lower die holders and plural punches are advanced and retreated to and from the material at the operating sequence given thereto. CONSTITUTION:The actuating force of a cylinder 7 is set larger than the actuating force of a cylinder 2 of an upper die 1 in the stage of performing closed forging by lowering the upper die holder 5 attached to the rod 4 of the piston 3 of said cylinder 2, joining the same to the lower die holder 10 attached with the rod 9 of the piston 8 provided to the cylinder 7 of a lower die 6, supplying the material into the recess having the outside shape of the product to be formed and advancing and retreating the 1st and 2nd punches 14, 15 to and from the material. The closed forging is then completed by lowering first the upper die 1 to engage a cam 18 and a slider 16, advancing the 1st punch 14 to forge the right side of the material, then lowering the upper die 1 against the actuating force of the cylinder 2, actuating a cam 19 and a slider 17 to advance the 2nd punch 15 toward the material and lowering further the upper die together with the lower die 6 against the actuating force of the cylinder 7.

Description

[Detailed description of the invention] A change! The present invention relates to a closed forging press, and more particularly to a gusset suitable for forming operations in which the closing direction of a molded product and the main pressing direction by a punch are different.

Naoden I Closed forging feeds the material into a sealed mold.

This is a device that molds products into the shape inside a mold by pushing one or more punches toward the material, and is a widely used device that has advantages such as a high material yield. .

An example of these devices is Japanese Patent Publication No. 58-11373, but all of the previously proposed devices, including the one shown in FIG. At the same time, the punch is actuated toward the mold, so material deformation (forming) within the mold may not be possible unless the punch is actuated under high pressure to produce a product with the desired shape.

FIG. 7A of the present application is an example of a product pressure-molded according to the present invention, which is a steering link for an automobile, and includes:
The product is molded from the preprocessed material as shown in FIG. 7B.

By the way, in the case of the product shown in FIG. 7A, in which the hole diameters formed on the left and right sides are different, the flow of material differs depending on the size of the punch diameter. When the punch used to form the hole is advanced simultaneously from the left and right sides, the punch causes the material to flow in the axial direction, but more of it flows toward the right side where the hole diameter is smaller. Therefore, when operating the left and right punches at the same time, it was necessary to firmly press the material with the right end face and force the material to flow to the left.

Therefore, there has been a need for an apparatus that can produce products with uniform left and right sides even if the left and right shapes are asymmetrical.

The present invention is applied to a molded product in closed forging where the direction of closure of the molded product and the main pressing direction by the punch are different, and the order of operation of the main pressing directions can be set, for example, when the shape is left and right. The aim is to provide a guiset that can be easily molded even if the product is asymmetrical.

Another object of the present invention is to provide a gusset in which the punch is pushed in and pulled out by the vertical movement of the slide.

Moxibustion Sarabe Collapse The present invention is characterized in that the outer shape of the product is formed in the recess with the upper and lower goo holders joined together, that each goo holder is supported by the cylinders of the upper mold and the lower mold, and that the upper and lower gou holders are joined together. By providing a punch movable in a direction perpendicular to the direction of movement of the gooey holder at both ends of the surface, and by making the punch have a difference in the force generated by the cylinders of the upper and lower molds, the punch moves inside the mold by the vertical movement of the upper mold. This is a closed forging goggle set that allows the forging to enter and exit alternately, so that even products with asymmetric left and right shapes can be formed without difficulty.

Figure 1 shows when the slide is rising, and pressure forming is performed in order from Figures 2 to 4, and Figure 4 shows when the slide has descended to the bottom dead center, and at this point processing is completed. ends.

Is the upper mold 1 attached to a slide (not shown)? A cylinder 2.2 is provided inside. A rod 4.4 of the piston 3.3 of the cylinder 2.2 projects from the lower surface of the upper mold l, and an upper gouging holder 5 is provided on the rod 4.4.

Further, the lower mold 6 is attached to a bolster (not shown), and a cylinder 7.7, a piston 8.8 in the cylinder, and a rod 9.9 of the piston 8.8 are protruded from the upper surface of the lower mold 6, similar to the upper mold. , a lower guide holder lO is provided on the rod 9.9.

The above-mentioned upper and lower gouey holders 5 and 10 constitute a closed mold, and when they are joined, a product cavity 11 as a recess is formed on the joining surface, and both ends of the joint of the two gouey holders are formed. A guide hole 12.13 is provided in the guide hole 12.13. Moreover, the product cavity 1 is located in the guide hole 12.13.
A cam slider 16,17 having a first punch 14 (right side) and a second punch 15 (left side) that move forward and backward toward the direction of the arrow 1 is housed. It has a long trapezoidal shape.

In order to move the two punches 14 and 15 by the vertical movement of the slide, the upper mold l has a knife-shaped cam 18 at a position corresponding to the right cam slider 16, and the lower mold 6 has a knife-shaped cam 18 at a position corresponding to the left cam slider 17. A knife-shaped cam 18 is also provided in each case. The right cam slider 16 is the cam 1
The left cam slider 17 moves to the right as the upper guide holder 5 descends, and the punch 1 moves to the left as the upper guide holder 5 descends.
4. Push both 15 toward the product cavity 11.

With reference to FIG.
8a is formed on the cam slider 16, and a dovetail-shaped sliding groove 18a that engages with the T-shaped rail 18a, and a sliding groove lθ that moves the T-shaped rail 18a when the upper die l is lowered.
A guide hole IBb is provided for guiding to a. Then, as the upper die l falls, the cam 18 fits into the guide hole 18b of the cam slider 16, and subsequently, as the upper die falls, the cam slider 16 moves to the left using the rail 18a as a guide.

Referring to FIG. 6, since the joint surface between the left cam slider 17 and the cam 19 of the lower mold maintains the joint relationship between the two from before the start of machining until the end of machining, the cam 18 has a T-shaped cross section. The cam slider 17 is provided with a slide 1117a that engages with the rail lea, and the cam slider 17
Is it sliding groove 1? a moves left and right using the rail 1θa of the cam 19 as a guide.

In the embodiment, fluid pressure is supplied to the cylinder 2.2 of the upper die l so that a force of 40 tons is generated to the upper guide holder 5, and the lower guide holder lO is supplied to the cylinder 7.7 of the lower die 6.
It is adjusted to generate a force of 100 tons.

In Fig. 1, when the material is placed on the lower die holder lO and the upper die l is lowered, the upper die holder 5 and the lower die holder 10 are joined, and the upper and lower die holders form a closed mold, and the material is accommodated in the product cavity 11. (Figure 2). This state is also a state in which the cam 18 is joined to the right cam slider 16, and the rail 18a of the cam is fitted into the guide hole 18b of the cam slider.

Subsequently, the upper mold 1 descends, but the upper die holder 5 moves 40t.
When the lower die holder 10 is on, the two are joined together under a pressure of 100 tons, so when the upper mold is lowered while maintaining the joined state, the piston 3.3 of the upper die holder 5 moves into the cylinder 2.
．． The cylinder chamber is compressed against the force of 2, and the upper die 1 and the upper guide holder 5 are brought into close contact with each other.

After the upper and lower gouey holders 5 and 10 are joined, the time during which the upper gooey holder 5 and the upper mold l are in close contact is the time during which the right punch 14 operates, and after the cam 18 is joined to the right cam slider 16, the time when the cam is lowered The cam slider 16 is pushed to the left and the punch 14 is pushed into the material to process the right half (FIG. 3).

Since the pressurizing force of the slide is adjusted to be higher than the push-up blade of the lower gouey holder 10, when the upper part 51 continues to descend further, the piston 8.8 of the lower gouey holder lO moves into the cylinder 7.
．． Compress the cylinder chamber against the force of 7 and press the lower guide holder l.
O and the lower mold 6 are in close contact with each other, and between this, the left cam slider 17
is pushed out to the right by the cam 19, and the left punch 15 is pushed into the material to process the remaining part (Figure 4).
.

FIG. 4 shows the slide reaching the bottom dead center, and all machining is completed in this state. Then, as the upper die l rises, the upper and lower guide holders 5.10 are moved to each cylinder 2.7.
The right cam slider 16 is pushed out again by the internal pressure, but the right cam slider 16 is moved to the first position by the rail 18a of the cam 18.
After being pulled back to the position shown in the figure, the rail escapes from the guide hole 16b and stops on the lower guide holder lO. on the other hand,
The left cam slider 17 is pushed up along the inclined surface of the cam 18 by the rise of the lower die holder 10, is pulled back to the left, and also stops at the position shown in FIG.

FIG. 1 shows before the start of the work and at the same time at the end, when the material is taken out as a product.

Since multiple punches can be operated at different times in a sealed mold, it is possible to process products with a desired shape at lower pressure than with conventional equipment. In addition, since the punch that is activated after the mold is closed can be pushed in and pulled out by the vertical movement of the slide, the punch operation is more reliable than when using fluid pressure, etc., and there is no possibility of defective products. It becomes.

In particular, even in the case of a product with asymmetric left and right shapes, such as the product shown in FIG. 7A, since the left and right sides are molded separately, there is an effect that unreasonable molding can be achieved.

[Brief explanation of the drawing]

Figures 1 to 4 are cross-sectional views showing the structure of this device and explaining the processing order. Figure 1 is when the slide is rising, and Figure 2 is when the slide is lowering and the upper and lower goo holders are joined. , Fig. 3 shows the machining with the punch on the right, and Fig. 4 shows the machining with the punch on the left. Fig. 5A is a sectional view showing the joint state between the right cam and cam slider, Fig. 5B is a front view showing the joint surface of the right cam slider, and Fig. 6 shows the joint state between the left cam and cam slider. FIG. 7A is a cross-sectional view of an example of a product formed according to the present invention, and FIG. 7B is a cross-sectional view of a preloaded material. ■...Upper mold? Cylinder 3... Piston 4... Rod 5... Upper die holder 6... Lower mold 7... Cylinder 8... Piston 9... Rod 10... Lower die holder 11... Product Cavity 12... Guide hole 13... Guide hole 14
...First punch (right side) 15...Second punch (left side) 1B...Right side cam sliver 18a...m moving groove
1ab...Guide hole 17...Left cam slider 1
7a...Sliding groove 18...Cam 18a...Ray J
19...Cam 1lla...Rail Patent Applicant: Aida Engineering Co., Ltd. Agent: Patent attorney: Yamazumi, Figure 7, Figure 3, Figure 4

Claims (1)

[Claims] When the upper and lower Gooey holders are joined together, they form a recess that forms the external shape of the product, and each Gooey holder is supported by the cylinders of the upper and lower molds, and at both ends of the joining surface of the upper and lower Gooey holders, there are holes perpendicular to the moving direction of the Gooey holder. The punch is provided with a punch that is movable in the direction in which the upper mold moves, and that moves forward and backward into the goo holder as the upper mold moves, and by creating a difference in the force generated by the cylinders of the upper mold and the lower mold, the order of operation of the punch is determined. A goose set for closed forging that is characterized by giving.