JPH0957360A - Cooling device for die punch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently and efficiently cool necessary parts of a punch body by discharging the refrigerant from a refrigerant discharge passage after the refrigerant is passed through a refrigerant passage. SOLUTION: A die punch 1 consists of a punch body 2 and a punch retainer 3. A cooling space 2b is provided within a projecting part 2a of the punch body 2. The cooling space 2b is open upward, and communicated with refrigerant discharge passages 2c, 2d of the punch body 2 at the top, and the refrigerant discharge passages are opened at the side of the punch body 2. A refrigerant feed pipe 4 is arranged in an attachable/detachable manner in the cooling space 2b, and a refrigerant passage 5 is formed between the refrigerant feed pipe and the inner wall of the punch body 2. The end part of the refrigerant feed pipe 4 is connected to a refrigerant introducing passage 3a provided on the punch retainer 3, the refrigerant fed therefrom flows out from the refrigerant feed pipe 4 into the refrigerant passage 5, and discharged from refrigerant discharge passages 2c, 2b after passing through the refrigerant passage 5. The refrigerant passage can be easily formed depending on the shape and the part to be cooled of the die punch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die punch cooling device.

[0002]

2. Description of the Related Art When a flat metal material is formed into a desired shape by a press machine, a die (punch and die) is used.
However, particularly in deep drawing, the protruding portion of the die punch is heated and adversely affects the processing accuracy, so it must be cooled. Such a die punch cooling means includes external cooling and internal cooling, and as external cooling, there is a lubricating oil spraying method that also serves as lubrication of the die punch, but deterioration of the surrounding environment due to oil scattering, There are various problems such as deterioration of safety. Further, as the internal cooling, for example, as shown in FIG.
, (B), a through hole Q for passing the refrigerant through the punch main body P is provided in a substantially U shape, and one end of the through hole Q is connected to the refrigerant introduction port S provided in the punch retainer R and The end is connected to the coolant discharge port T, and the punch body P is cooled by passing the coolant supplied from the coolant introduction port S through the through hole Q and discharging it from the coolant discharge port T.

[0003]

According to the above-described conventional die punch internal cooling means, it is difficult to perform sufficient cooling at the cooling required portion because the position of the through hole Q is limited, and cooling is performed with high efficiency. There are naturally limits to what you can do. Further, in the case of difficult-to-form processed parts, a hard material is often used as the material of the punch main body, so that it is not easy to machine the through holes Q, and two parallel vertical holes and these There is a problem that it is very difficult to process and finish, because one horizontal hole for connecting the two horizontal holes must be formed and a stopper U must be attached to the open end of the horizontal hole. The present invention has been made to solve such a conventional problem, and is capable of sufficiently and efficiently cooling a necessary portion of a punch main body, and moreover, a refrigerant passage is easily formed and a mold which does not require a stopper is formed. An object is to provide a cooling device for a punch.

[0004]

As a means for technically solving the above-mentioned problems, the present invention relates to a die punch composed of a punch body and a punch retainer, wherein a cooling space is provided inside the punch body. A coolant supply pipe is detachably disposed in the cooling space to form a coolant passage between the coolant supply pipe and the inner wall of the punch main body, and the end of the coolant supply pipe is provided in the punch retainer. Of the die punch connected to the refrigerant introduction path, the refrigerant sent from this refrigerant introduction path is made to flow out from the refrigerant supply pipe to the refrigerant passage, and is discharged from the refrigerant discharge passage after passing through this refrigerant passage. The cooling system is the main point. Further, the gist is that holes for refrigerant outflow are provided on the side wall of the refrigerant supply pipe so as to correspond to the cooling required portion of the punch body.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In Fig. 1 (a) and (b), 1
Is a die punch and includes a punch body 2 and a punch retainer 3. The punch body 2 is provided with a cooling space 2b inside the protrusion 2a while maintaining a necessary strength as a punch. The cooling space 2b is opened upward and the upper portions are provided on both sides of the upper portion of the punch body 2. Refrigerant discharge path 2
The coolant discharge passages 2c and 2d communicate with c and 2d, respectively, and are opened to the side of the punch body 2. On the other hand, in the punch retainer 3, the refrigerant introduction path 3a is provided in parallel with the refrigerant discharge path 2c of the punch main body 2, and the punch retainer 3 has a dead end at a substantially central portion.

Reference numeral 4 is a refrigerant supply pipe, and as shown in FIG. 2, the upper portion 4a is cylindrical, the intermediate portion 4b is gradually wide flat as it goes downward, and the lower portion 4c is subsequently flattened tubular. Each of them is formed further, and substantially V-shaped notches 4d are formed symmetrically at both corners of the lower end.

In this refrigerant supply pipe 4, a flat rectangular tube-shaped lower portion 4c is inserted into a cooling space 2a of the punch main body 2, and an upper portion 4a thereof is introduced into a coolant introducing passage 3a of the punch retainer 3.
It is arranged so that it can be attached to and detached from the rear end of the. At this time, as shown in FIG. 1B, the refrigerant passage 5 is formed between the end face of the flat rectangular tubular lower portion 4c of the refrigerant supply pipe 4 and the inner wall of the protruding portion 2a, and the lower end of the flat rectangular tubular lower portion 4c is formed. Contacts the inner wall of the protrusion 2a. Incidentally, 6 is an O-ring for sealing.

With the above structure, the die punch 1 is provided with a series of refrigerant feed passages, that is, when the refrigerant is fed from the inlet of the refrigerant introduction passage 3a of the punch retainer 3 (arrow A), the refrigerant is introduced into the refrigerant introduction passage 3a. Flow into the refrigerant supply pipe 4 (arrow B), flow down in the pipe (arrow C), and flow out into the refrigerant passage 5 from the cutout 4d at the lower end (arrow D).
Then, the refrigerant passage 5 rises (arrow E) and flows into the refrigerant discharge passages 2c and 2d (arrow F) as shown in FIG.
Then, it is discharged from the outlet to the outside (arrow G).

In the flow of the refrigerant, particularly the refrigerant passage 5
It is possible to cool the projecting portion 2a of the punch main body 2 when passing through the punch body 2, and thus it is possible to effectively cool the place where cooling of the projecting portion 2a is required.

FIG. 3 shows another embodiment of the refrigerant supply pipe, which has the same basic structure as that of FIG. 2, that is, the upper portion 14a of the refrigerant supply pipe 14 is cylindrical and the intermediate portion 1 is formed.
4b gradually becomes wide and flat as it goes downward, and the lower part 14
c is subsequently formed into a flat rectangular tube shape, except that the lower end of the lower portion 14c is closed and the side wall has an outlet hole 1c.
That is, a plurality of 4d are formed.

In this case, the size, number, position, etc. of the holes 14d are not limited, and the holes 14d are provided so as to correspond to the shape of the punch body and the portion to be cooled. Attach it so that it does not contact the inner wall of the protruding part of the punch body. The coolant supply pipe 14 can effectively cool the cooling-needed portion of the punch body, or is effective when the flow of the coolant is changed by replacing it with that of FIG. Since the refrigerant supply pipes 4 and 14 can be easily attached and detached, they are convenient to change or replace.

[0012]

As described above, according to the present invention,
By providing a cooling space in the punch body and arranging the coolant supply pipe detachably in this cooling space, it is possible to sufficiently and efficiently cool the necessary parts of the punch body. The refrigerant passage can be easily formed in accordance with the shape of the punch and the portion requiring cooling, and the refrigerant passage can be easily replaced or changed, and there is an excellent effect that no cap is required.

[Brief description of drawings]

FIG. 1A is a vertical sectional front view of a die punch showing an embodiment of the present invention, and FIG. 1B is a vertical sectional side view.

FIG. 2 is a perspective view of a refrigerant supply pipe.

FIG. 3 is a perspective view showing another embodiment of the refrigerant supply pipe.

FIG. 4A is a vertical sectional front view of a die punch showing a conventional example, and FIG. 4B is a vertical sectional side view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mold punch 2 ... Punch main body 2a ... Projection part 2b ... Cooling space 2c, 2d ... Refrigerant discharge path 3 ... Punch retainer 3a ... Refrigerant introduction path 4 ... Refrigerant supply pipe 4a ... Upper part 4b ... Intermediate part 4c ... Lower part 4d ...
Notch portion 5 ... Refrigerant passage 6 ... Sealing O-ring 14 ... Refrigerant supply pipe 14a ... Upper portion 14b ... Intermediate portion 14c ... Lower portion
14d ... hole

Claims (2)

[Claims] 1. A die punch comprising a punch main body and a punch retainer, wherein a cooling space is provided inside the punch main body, and a coolant supply pipe is detachably arranged in the cooling space. A refrigerant passage is formed between the inner wall of the punch main body, the end of the refrigerant supply pipe is connected to the refrigerant introduction passage provided in the punch retainer, and the refrigerant sent from the refrigerant introduction passage is supplied from the refrigerant supply pipe. A cooling device for a die punch, which is made to flow out to the refrigerant passage, passed through the refrigerant passage, and then discharged from the refrigerant discharge passage. 2. The coolant outlet pipe is provided with a coolant outlet hole on the side wall of the coolant delivery pipe so as to correspond to a cooling required portion of the punch body.
Cooling device for the die punch described.