JP2653151B2 - Forging press equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a forging press device for forging a flat work such as a metal disk.

"Conventional technology and problems to be solved" A normal forging press device is configured to compress the entire upper and lower surfaces of a work between an upper die and a lower die to forge. When forging a metal disc having a large diameter, a large driving force is required to close the mold because the contact area between each die and the work is large and the pressing force is dispersed. Therefore, the press apparatus is inevitably increased in size, and has a disadvantage that a large facility cost is required.

"Means for solving the problem" The present invention has been made to solve the above problems,
The forging surface of the upper die is formed in a belt shape that can be in contact with the entire length of the work in the diameter direction, and a die rotating mechanism for relatively rotating each die at a predetermined angle is provided.

[Operation] In this forging press, a work is placed on the lower die in a disk shape or the like, the mold is closed, the work is pressed in a belt shape over the entire length in the diameter direction of the work, then the mold is opened and each die is moved The relative pressing is performed so that the first press point and the next press point partially overlap each other over the entire length, and the press is performed again. Thus, the work is rotated once by alternately repeating the press and the die relative rotation, and the entire surface is forged smoothly. According to this, even if the workpiece has a large diameter, the forging surface of the upper die has a small area, so that a sufficient forging pressure can be obtained with a relatively small mold closing force, and the entire press device can be downsized. .

"Embodiment" Figs. 1 and 2 are a front view and a plan view showing an embodiment of a forging press apparatus according to the present invention.

In the drawing, reference numeral 1 denotes a lower die fixed horizontally to a support base 2, and an upper die 3 is arranged in parallel above the lower die 1, and is connected via a pair of guide bars 4 so as to be vertically movable. A pair of tie rods 5 slidably penetrating through the lower die 1 are attached to the upper die 3 vertically, and a hydraulic cylinder 7 is attached to the lower ends of these tie rods 5 via a mounting body 6 below the lower die 1. It is fixed upward. The rod 7A of the hydraulic cylinder 7 is fixed to the lower surface of the lower mold 1, and when the rod 7A is protruded, the mounting body 6 and the upper mold 3 are lowered and the mold is closed.

On the other hand, the lower die 1 is provided with a lower die rotating mechanism 8 as shown in FIG. 3 to FIG. An opening 9 is formed at the center of the lower mold 1, and a columnar fixing base 10 is horizontally arranged in the opening 9 and fixed to the lower mold 1. Six holes 11 are formed on the upper surface of the fixing base 10 at equal intervals along a circumference coaxial with the fixing base 10, and in these holes 11,
Each of the roller plates 13 is housed in a state of being urged upward by the spring 12. Rollers are placed on the upper surface of each roller plate 13.
14 are mounted vertically and rotatably, and these rollers 14
Are all oriented in the circumferential direction. Also each roller plate
The support 13 is supported by a pressing plate 15 attached to the fixed base 10 so that only the rollers 14 protrude from the upper surface of the fixed base 10 so as not to fall off. Each roller 14 can support the weight of a lower die, which will be described later.

On the other hand, guide rollers 16 are horizontally rotatably mounted on the outer periphery of the upper end of the fixed base 10 at equal intervals in the circumferential direction.
10 project slightly outward in the radial direction. And fixed base 10
A lower die 17 having a disk shape larger in diameter than the fixed base 10 is placed on the upper part, and a hanging part formed on an outer peripheral portion of the lower die 17 is formed.
All guide rollers 16 are in contact with the inner surface of 17A. Further, the roller 14 is in contact with the lower surface of the lower die 17, the lower die 17 is rotatable while accurately maintaining the axial position, and further, gear teeth 17B are engraved on the outer periphery of the lower die 17. I have.

On the other hand, inside the lower mold 1, an air motor 18 is arranged on the side of the fixed base 10, and the air motor 18 is connected to a rotation transmitter 19,
The rotary table 17 is configured to intermittently rotate via the gear 20 meshing with the gear teeth 17B.

On the other hand, on the lower surface of the upper die 3, an upper die 21 shown in FIGS. 6 and 7 is fixed horizontally. Dice on this 21
Consists of a disk-shaped support portion 21A and a rectangular parallelepiped pressing portion 21B extending and fixed in the center of the lower surface of the lower surface of the support portion 21A, and both lower edges of the lower portion of the pressing portion 21B are cut off obliquely. I have.

The lower end surface (forged surface) 21C of the pressing portion 21B has an elongated rectangular shape larger than the diameter of the disk-shaped work W. The smaller the width of the forged surface 21C, the smaller the mold closing force is. However, the number of presses performed on one work W is increased, and a radial forging mark may be left on the work W. It should be set in consideration of both conditions.

To use the above forging press equipment, first use the lower die
The work is set on 17 and the upper die 3 is lowered, and the work W is pressed in a belt shape over the entire length in the diameter direction by the pressing portion 21B of the upper die 21.

Then, the upper die 3 is raised, and the air motor 18 is operated to rotate the lower die 17 at a fixed angle, so that the next press point P2 extends over the entire length of the previous press point P1 as shown in FIG. The work W is positioned so as to partially overlap. Pressing and rotation are alternately repeated in the same manner, and forging is performed so that the entire surface of the work W becomes smooth.

Therefore, in the forging press having the above configuration,
Even if the workpiece W has a large diameter and large area, the upper die 21
Since the area of the forging surface 21C is small, a sufficient forging pressure can be obtained with a small mold closing force, the apparatus can be downsized, and the equipment cost can be reduced even when forging a large-diameter work W.

Further, since the lower die 17 is configured to be rotated, the mechanism is simpler than that in which the pressed portion is moved in a linear direction, and high accuracy can be obtained.

The work W to which the apparatus of the present invention is applied is not limited to a disc-shaped work, and any work that is a flat work having a small difference between a short diameter and a long diameter can be forged. In the above embodiment, the lower die 17 is rotated, but instead, a die rotating mechanism may be incorporated into the upper die 3 to rotate the upper die 21 intermittently. Further, the lower die 1 may be raised to perform the pressing.

[Effects of the Invention] As described above, the forging press device according to the present invention places a flat work on the lower die, closes the mold, presses the work in a belt shape over the entire length in one diameter direction of the work, Open the mold and rotate each die relatively so that the previous press location and the next press location partially overlap over the entire length,
Press again. As described above, the work is rotated once by alternately repeating the press and the relative rotation, and the work is forged smoothly over the entire surface. As a result, even when the workpiece has a large diameter, a sufficient forging pressure can be obtained with a relatively small mold closing force because the area of the forging surface of the upper die is small,
It is possible to reduce the size of the entire press device, and the equipment cost can be reduced accordingly.

In addition, since either one of the upper die and the lower die is rotated, the accuracy can be easily increased as compared with the configuration in which the pressed portion is moved in parallel, and there is an advantage that the mechanism is simple.

[Brief description of the drawings]

1 and 2 are a front view and a plan view showing one embodiment of a forging press apparatus according to the present invention. FIGS. 3, 4, and 5 are plan views showing a die rotating mechanism of the apparatus. FIGS. 6 and 7 are a plan view and a side view showing a forging surface of the upper die, and FIG. 8 is an explanatory view showing a forging method using the same device. W: disk-shaped work, 1: lower die, 3: upper die, 8: lower die rotating mechanism, 10: fixed base, 14: roller, 16: guide roller, 17: lower die , 18 ... Air motor, 21 ... Upper die, 21C ... Forged surface.

Claims (1)

(57) [Claims] 1. A forging press apparatus for relatively opening and closing an upper die and a lower die, and compressing a disk-shaped work between the upper die and the lower die. A forging press device provided with a die rotating mechanism that is formed in a belt-like shape that can be brought into contact with each other and that relatively rotates each die at a predetermined angle.