JP2000033452A - Press apparatus for work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the regenerating working of a releasing agent so as not to mix a releasing agent and cooling water by arranging a pipe for jetting the releasing agent toward a die opening part at the upper part of the die and surrounding the outer peripheral surface of the upper part of the die with a cooling frame for circulating a cooling liquid. SOLUTION: A releasing agent is jetted toward the first die 10 and the second die 11 from a pouring tube 22 of the releasing agent by raising a pressing plate 14 and a fitting plate 13, and in the first die 10, a heated blank and in the second die 11, an intermediate product 2 formed using the first die 10, are inserted respectively. The inter-mediate product 2 with a first punch 17 and an original shaped product 3 with a second punch 16 are simultaneously formed respectively by lowering the pressing plate 14. Since the releasing agent is jetted through the die opening parts 10a, 11a toward the intermediate product 2 and the original shaped product 3, these products are easily separated from the dies. The upper parts of the first die 10 and the second die 11 are cooled with the cooling water in the cooling frame 19 to prevent the overheat, and the releasing agent and the cooling water are perfectly separated and not mixed and the regenerating cost of the releasing agent is reduced. Further, the cooling effect of the first die 10 and the second die 11 are high, and the durability thereof is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press device used for molding an engine valve, for example.

[0002]

2. Description of the Related Art As shown in FIG.
Hot squeeze and forge the heated short cylindrical material (1)
Intermediate product whose upper end expands (hereinafter referred to as the first work) (2)
After this is formed, it is further hot forged to obtain a prototype engine valve (hereinafter referred to as a second work) (3), which is subjected to a plurality of machining processes to produce a product.

The first work (2) and the second work (3)
Are continuously formed by a press device (not shown).
At this time, a high-viscosity oil-based release agent is injected into the die in order to make it easier for the formed work to be released from the die and to suppress wear of the die.

[0004] Further, since the molding of the work is performed hot, if the die is used for a long time, the die is overheated and its durability is impaired. Therefore, cooling water is sprayed on the surface of the die to prevent the die from being overheated.

[0005]

Since the above-mentioned release agent is expensive, it is generally recovered after use, regenerated and reused. For this reason, as described above, when the release agent and the cooling water are injected into the die, the release agent and the cooling water are mixed at the time of recovery, and the operation of regenerating the release agent, that is, cooling from inside the release agent The operation of removing water is troublesome, and the cost required for the regeneration operation increases.

The present invention has been made in view of the above problems, and provides a press apparatus which can easily perform a regenerating operation of a release agent by preventing mixing of the release agent and cooling water. It is intended to be.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a press apparatus comprising a punch and a die which are relatively opposed to each other and move relative to each other. And a pipe for injecting
The problem is solved by surrounding the outer peripheral surface of the upper part of the die with a cooling frame in which a coolant circulates.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a main part of the press device of the present invention. Lower horizontal substrate in die set
Two circular vertical mounting holes penetrating through (4)
Bottom plates (6) and (6) are fitted to the lower part of (5), respectively.
At the center of each bottom plate (6), a through hole (7) through which the shaft portions (2a) and (3a) of both works (2) and (3) can pass is formed. At the lower part of each through hole (7), a support cylinder (8) communicating with it is provided continuously.

In the left mounting hole (5), there is a first die case.
(9) is placed and fitted on the bottom plate (6), and the first die (10) is pressed into the first die case (9) by protruding above the substrate (4). Have been. Also, the right mounting hole (5)
Inside, a second die (11) is press-fitted. Reference numeral (12) indicates a fixing bolt.

A mounting plate (13) and a pressing plate (14) are integrally fixed to a pressing device (not shown) provided above the substrate (4). A first punch guide (15) and a second punch (16) are respectively fitted to the mounting plate (13) so as to face the first die case (9) and the second die (11), respectively. It is fixed by fixing bolts (12).

In the first punch guide (15), a first punch is provided.
(17) and the shim (18) are slidably fitted in the vertical direction,
An enlarged-diameter flange (17a) formed at the upper end of the punch (17) and a step (15a) formed closer to the upper part in the first punch guide (15).
This prevents the first punch (17) from falling.

On the upper surfaces of the first die case (9), the first die (10) and the second die (11), a cooling frame (19) having a rectangular shape in plan view for supplying and circulating cooling water. Are the first and second dies
(10) It is provided so as to surround the upper outer peripheral surface of (11). Cooling water supply pipes are provided at both left and right ends of the cooling frame (19).
(20) and a drain pipe (21) are provided.

A release agent injection pipe (22) penetrates the center of the substrate (4) and the cooling frame (19).
A nozzle (23) for injecting a release agent toward the mold holes (10a) and (11a) of the first and second dies (10) and (11) is provided.

Next, the operation of the above press device will be described.
With the pressure plate (14) and the mounting plate (13) raised by the pressure device, the release agent is injected from the injection pipe (22) into the first and second dies (10) and (11). One die (10) has the superheated material (1) shown in FIG. 2 and the second die (11) has the first die.
The first work (2) formed in (10) is inserted respectively. Note that cooling water is circulated in the cooling frame (19).

Then, when the pressing plate (14) is lowered by the pressing device, the first work (2) is formed by the first punch (17), and the second work (3) is formed by the second punch (16). , Each being pressed simultaneously.

The first work (2) and the second work (3) after molding.
Since the mold release agent is injected into each of the mold holes (10a) (11a), the mold can be easily removed from each die (10) (11). The upper portions of the first and second dies (10) and (11) are provided with cooling frames (1).
9) Since they are cooled by the cooling water circulating in them, they are prevented from overheating. Further, since the release agent and the cooling water are completely separated, water does not mix into the release agent after recovery.

[0017]

According to the press apparatus of the present invention, since the cooling liquid does not mix into the release agent, the release agent can be easily regenerated and reused, and the cost required for the regeneration operation is reduced. It is greatly reduced. Further, since the outer peripheral surface of the die is directly cooled by the cooling liquid, the cooling effect is high and the durability thereof can be improved.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional front view of a press device according to an embodiment of the present invention.

FIG. 2 is a front view schematically showing a process of forming an engine valve.

[Explanation of symbols]

 (1) Material (2) Intermediate product (first work) (2a) Shaft (3) Original product (second work) (3a) Shaft (4) Board (5 mounting holes (6) Bottom plate (7) through Hole (8) Support tube (9) First die case (10) First die (10a) Mold hole (11) Second die (11a) Mold hole (12) Fixing bolt (13) Mounting plate (14) Pressing plate (15) First punch guide (15a) Step (16) Second punch (17) First punch (17a) Flange (18) Shim (19) Cooling frame (20) Supply pipe (21) Drain pipe (22) Release agent injection pipe (23) Release agent injection nozzle

Claims (1)

[Claims] 1. A press apparatus comprising a punch and a die which are relatively opposed to each other and move relative to each other, wherein a pipe for injecting a release agent toward the mold hole is provided above the die, and an outer periphery of an upper part of the die is provided. A work press device, wherein a surface is surrounded by a cooling frame in which a cooling liquid circulates.