JPS6083735A - Closed forging device - Google Patents

Abstract

PURPOSE:To execute easily a hot or warm closed forging by installing as one body an upper punch and its pressure mechanism to a body frame which contains a segmented die and its clamping mechanism, and a lower punch and its pressure mechanism. CONSTITUTION:Segmental metallic dies 5, 5' are fixed by a bolt to front and rear metallic die holders 16, 17, respectively. Subsequently, a forging base material is put into a space formed by the front and rear split metallic dies 5, 5' and a lower punch 6, and when a pressurized oil is put into a drawing-back cylinder 18 and it is pushed, the metallic die holder 16 advances. Next, a space wedge 19 is advanced, and simultaneously, when a clamping wedge is advanced, the segmental metallic dies 5, 5' are clamped with a high clamping force by a link mechanism 7-8. Subsequently, a wedge 20 is slid by a cylinder 23, and the lower punch 6 is pushed up by moving upwardly a lifting block 21. At the same time, when an upper punch 4 is lowered by operating a main pressure cylinder 2, forming of the slug is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a closed forging device. Conventional forging presses include (1) hydraulic double-acting presses, (2) mechanical double-acting presses, and (3) die sets that incorporate hydraulic or mechanical double-acting mechanisms into mechanical or hydraulic presses. It is known. Among these, (1) hydraulic double-acting press and (2)
The mechanical double-acting press described in (3) has a high equipment cost, and the die set (3), which incorporates a hydraulic or mechanical double-acting mechanism in a mechanical or hydraulic press, is generally used only to obtain pressurizing force. It uses a press and requires an expensive press.

It is possible to easily carry out closed forging in hot or warm conditions, and it is possible to produce a forging device with a forging force of 1 using a mold divided into two parts in the front and back direction, and which has the same functions as conventional forging devices at a low cost. This is what we are trying to provide.

The present invention capable of achieving this object can be summarized as follows. That is, the upper die and its pressing mechanism are attached to a main body frame that houses a split die and its tightening mechanism, a lower punch and a pressing mechanism for the lower punch.

The present invention will be explained in detail below. Reference numeral 1 denotes a main body frame, and a C-shaped frame extends from the frame 1, and two main pressure cylinders are attached to the upper tip of the C-shaped frame. 91 has been stolen. 3
4 is a main pressurizing piston, and 4 is an upper punch operated by the main pressurizing piston. 5 is a rear part 1t'lJ mold, 5' is a front part split mold, and these molds, as well as the punch 4 and lower punch 6, are used to form the forged material into the molded product A (Fig. 5). A forging space is formed.

7 is a link pin interposed between half-moon saddles 8 and 8, side links 9 are attached to both ends thereof, and the link pin 7 is connected to a mold clamping wedge 11 and a mold clamping cylinder 12. 1
3.14 is a hydraulic supply port. The half-moon saddle 8.8 is supported within the main body frame 1 via a bush 15. A bushing 15 is also fitted between the link pin 7 and the half-moon saddle 8.

16 is a front mold holder, and 17 is a rear mold holder. Reference numerals 18 and 18' denote pull-back cylinders for the front mold holder 16 and the rear mold holder 17, each of which is equipped with a hydraulic pressure supply port. The space wedge 9 is provided between the main body frame 1 and the front mold holder 16, and when the wedge 19 is extracted by the cylinder 19a (Fig. 3),
The front split mold 5' together with the front mold holder 16 can be opened wide. 20 is a lower punch protruding wedge which is operated by the lower punch actuating cylinder 23 and lower punch 6
is dovetail-groovedly engaged with the push-up block 21 to which is fixed. The lower punch 6 is fixed to the push-up block 21 and passes through the hard plate 22. When it is pushed up, its upper end is thrust into the forging space. 24
．． 25 is a hydraulic pressure supply port.

Next, the operation will be explained.

1) When forging, first supply oil to the cylinder 19a and return the space wedge 19 in the direction of arrow 0. Next, hydraulic pressure is supplied to the retraction cylinder 18, and the front mold holder 16 is retreated in the direction of arrow 0. Also, when the rear die holder 17 moves the cylinder 12 backward and the mold clamping wedge 11 moves backward, the cylinder 18' is constantly supplied with pressure oil in the pull-back direction, so the link pin 7 operates and the rear die holder 17 moves backward. The mold holder 17 has been pulled rearward.

On the other hand, the lower punch 6 moves the lower punch protruding wedge 20 and the lower punch push-up block 21 by the backward movement of the cylinder 23.
is going down through.

2) In this state, fix the split molds 5.5' to the front and rear mold holders 16, 17 with bolts, respectively.

3) Next, the forged material is put into the space formed by the front and rear split molds 5.5' and the lower punch 6, and when pressurized oil is put into the pull-back cylinder 18 and pushed, the front mold holder 16 moves forward. Next, the space wedge 19 is advanced by the cylinder 19a, and at the same time, the tightening wedge 11 is moved forward by the cylinder 12.
When the split mold 5.5' is advanced, the link mechanism 9-7-8 tightens the split mold 5.5' with a high tightening force.

Next, the cylinder 23 slides the wedge 20 and moves the push-up block 21 upward to push up the lower punch 6. At the same time, the main pressure cylinder 2 is activated and the upper punch 4 is lowered to form the material. .

When the molding is completed, the upper punch 4, the rear split mold 5,
The space wedge 19 and the front split mold 5' are retreated in this order, and a molded product A (FIG. 5) is taken out by a take-out device (not shown), thus completing one process. In the above embodiment, the upper punch and its pressurizing mechanism are attached to a C-shaped frame that extends from the main body frame, but they may also be attached to a gate-shaped frame that extends from the main body frame. good.

[181-Upper X+ Mutsu d) W+7g Non-extruded brocade needle
Since it is attached to the body, the configuration is extremely simple compared to conventional double-acting presses, etc., and equipment costs can be significantly reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a closed forging device according to the present invention. FIG. 2 is a sectional front view of the main part of the closed forging device. FIG. 3 is a plan view of a part of the split mold and the die holder taken along lines 1 to 2 in FIG. 2; FIG. 4 is a view taken along the line IV-IV in FIG. 3, and is a detailed view of the mold clamping mechanism on the rear side. Figure 5 is a cross-sectional view of the forged product. In the figure: A Molded product 1 Main body frame 1'C-shaped frame 2 Main pressure cylinder 3 Main pressure piston 4 Upper punch 5 Rear split mold 5' Front split mold 6 Lower punch
7 Link pin 8 Half-moon saddle 9 Side link 11 Mold clamping wedge 12 Mold clamping cylinder 13.14 Hydraulic supply port E5 Bush 16 Front mold holder 17 Rear mold holder 18.18', (front part and rear mold holder) Retraction cylinder 19 Space wedge 19a Cylinder 20 Lower punch protrusion wedge 21 Push-up block 22 Hard plate 23 Lower punch actuation cylinder 24.25 Hydraulic supply port Above Applicant Sumitomo Heavy Industries, Ltd. Sub-Agent Isamu Ohashi, Patent Attorney Figure 3 Figure 4 Figure 5 1 ■ Figure 5

Claims (1)

[Claims] A closed-cold forging device characterized in that an upper punch and its pressurizing mechanism are directly attached to a main body frame that incorporates a split die and its tightening mechanism, a lower punch and a pressurizing mechanism for the lower punch. .