JP2826620B2 - Press forming method for forged products, etc. - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press forming method for a forged product or the like in the field of press forming.

2. Description of the Related Art Conventionally, forged parts manufactured through a plurality of processes are arranged in a single process or a plurality of forging presses in a single row or in an L-shape, and the material is subjected to each forging press using a manipulator such as a robot or a transfer machine. It was conveyed to the position and molded.

Problems to be Solved by the Invention Therefore, a manipulator and a transfer machine are required between each forging press, and the material must be put into a die or the like for each forging press and taken out. It took extra time and reduced productivity.

Japanese Utility Model Application Laid-Open No. 64-54937 proposes mounting a die on a pair of upper and lower die holders, indexing and rotating the die, stamping the material, and forging the die. However, the pressing mechanism that stamps with a rod can press only at the material loading / unloading section of the lower gantry. And the production efficiency was not good. In addition, since the table to be driven for rotation is arranged in the main body of the device, a certain space is required to put the material into the mold and take out the molded product, the device becomes larger, and the press stroke becomes longer. It was something.

Means for Solving the Problems The present invention has been made in view of the above points, and in order to solve the above problems, a mold holder is radially mounted between a press slide and a bed of a press forming apparatus. A mold in which a circular mold turntable is protruded laterally from the apparatus body and a molded product take-out position is protruded laterally from the apparatus main body, and the material is supplied from the material input position protruding to the side of the apparatus main body. Insert the mold into the mold holder one by one,
The material loaded into the mold is pressed simultaneously by the upper die plate, which rotates at every pitch, and the lower die plate on the bed side of the press forming apparatus and the upper die plate on the press slide side, in which a punch portion is projected radially opposite to the mold. Another object of the present invention is to provide a method for press-forming a forged product or the like, characterized in that the molded material is sequentially taken out at a molded product taking-out position protruding to the side of the apparatus body together with the mold.

Examples Hereinafter, the present invention will be described based on examples.

FIG. 1 et seq. Show one embodiment implemented on a forging press of the present invention. As shown in FIG. 1, the forging press forming apparatus 1 has a mold rotating table 4 rotatably disposed around the left and right centers between a press slide 2 and a bed 3. As shown in the figure, a plurality of dies 5 (eight at a 45 ° pitch in the figure) are fitted radially at a uniform pitch. Then, as shown in FIG. 1, the lower die plate 6 is installed on the bed 3 side, and the upper die plate 8 which protrudes the punch portion 7 against the die 5 is installed on the press slide 2 side. The input molding material 9 is forged and press-molded.

The molding material 9 is loaded into the cylindrical mold 5 as shown in FIGS. 3 and 4, and is fixed to the mold turntable 4 as shown in FIGS. 1, 2 and 5. The mold 5 is detachably fitted to the mold holder 10 thus formed and press-molded. Then, as shown in FIG. 2, the mold 5 loaded with the material 9 into the mold holder 10 is loaded at the material loading position 11 where a part of the mold rotating table 4 is protruded from the apparatus main body of the press forming apparatus 1, and the mold 5 is loaded. As the mold turntable 4 rotates at every pitch, the material 9 to be charged into the mold 5 is sequentially forged as shown in FIG. 6, FIG. 7, and FIG. After approximately one rotation, the material 9 molded as shown in FIG.
Is pushed up with the knockout pin 13 together with the split mold 5 and taken out.

The press slide 2 of the press forming apparatus 1 can be moved up and down by well-known forging means. As means for rotating the mold rotating table 4, an index table can be used, or a mold can be formed by a servomotor or the like. This can be performed by turning the rotation shaft 14 of the turntable 4 or turning the turntable itself.

Therefore, as described above, the material for molding can be forged by a single forging press and formed into a predetermined part, and the material for molding can be inserted into a mold holder via a mold. The mold turntable is sequentially turned and the material can be sequentially forged and formed simply by being thrown in once. For this reason, it is not necessary to insert or remove a material into or from a mold for each process as in the related art, and the press molding cycle time can be reduced as much as possible.

In addition, as described above, since the mold is arranged circumferentially, the distance from the center of the press to the center of the forming load is reduced, and the eccentric load applied to the press can be reduced, thereby improving the durability of the apparatus. Also, as described above, the material input position and molded product take-out position are protruded to the side from the main body of the device. The molding can be shortened, and the molding cycle time can be further reduced.

In the above embodiment, the mold rotating table is fixed to the press molding apparatus. However, the mold rotating table, upper die plate, and lower die plate for mounting a predetermined mold may be arranged to be exchangeable. You can do it.

In the above, a forging press has been described as a press forming apparatus. However, the present invention can be implemented by appropriately changing the design of another press method that requires multiple steps.

Advantageous Effects of the Invention As described above, in the present invention, it is possible to perform input of a material and removal of a molded product without ascending a press slide high, and molding by shortening a press stroke as much as possible.
It is intended to shorten the molding cycle time. In addition, if the mold in which the material is sequentially charged into the material charging position of the press forming apparatus is inserted into the mold holder, the mold can be sequentially pressed and formed at the take-out position every time the mold rotating base is rotated by one pitch. Thus, the cycle time of press molding can be greatly reduced, and the productivity can be significantly improved. Furthermore, since the mold into which the material has been charged is fitted into the mold holder, and the molded material is removed from the mold holder together with the mold, the material can be easily introduced into the press device, and the molded product can be easily removed. Things.

[Brief description of the drawings]

FIG. 1 is a schematic front sectional view of a part of the embodiment of the present invention, in which a part is omitted. FIG. 2 is a plan view of a mold turntable unit of the above embodiment. FIGS. 3 and 4 are plan views of the mold unit of the embodiment. Figures and side sectional views, FIGS. 5 to 9
The drawings are side sectional views for explaining the processing steps of the above. 1 ... Press forming device, 2 ... Press slide, 3 ...
Bed, 4 ... die turntable, 5 ... die, 7 ... punch, 9 ... material.

Claims (1)

(57) [Claims] 1. A circular mold rotating table in which a mold holder is radially mounted between a press slide and a bed of a press molding apparatus, and a part for ejecting a molded product is laterally protruded from a main body of the apparatus. The press-forming device is arranged such that it can be freely rotated and the molds into which the material has been charged from the material charging position protruding to the side of the device body are sequentially inserted into the mold holder, and the mold rotating table is rotated by one pitch. The lower die plate on the bed side and the punch part are projected radially opposite the mold on the press slide side. The materials loaded into the mold are pressed simultaneously by the upper die plate simultaneously, and the molded material is A method for press-forming a forged product or the like, characterized in that the product is sequentially taken out at a take-out position of the product protruding to the side of the apparatus body.