KR20170075959A

KR20170075959A - A Parting Powder Spray Machine of hot forging die

Info

Publication number: KR20170075959A
Application number: KR1020150185567A
Authority: KR
Inventors: 김재용
Original assignee: 주식회사 동산공업
Priority date: 2015-12-24
Filing date: 2015-12-24
Publication date: 2017-07-04

Abstract

Disclosed is a hot-forging mold dispensing apparatus capable of molding a hot forging product having precise teeth formed without causing a break in a molded product by concentrating and spraying air and a release agent on the outer surface of a hot forged product.
The present invention relates to a hot forging die, a reciprocating unit for reciprocating forward and backward in a state of being opposed to each other on the front and rear sides of a hot forging die, a connecting rod penetrating through the reciprocating unit, At least one unit passage nozzle installed at an outlet of the connecting rod for passing the air and the release agent supplied through the connection, and a plurality of unit passage nozzles connected to the front end of the unit passage nozzle, And a spray nozzle for spraying air and a release agent, which have passed through the unit passage nozzle, in a position where the teeth of the hot forging product are to be formed in a state where the hot spray nozzle is moved upwardly in accordance with the reciprocating movement of the hot forging, This is formed in a semicircular ring shape so as to correspond to a circular shape, And in that the cross-technological base to concentrated injection of the air and the release agent on the outer surface of the forged product,

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hot forging die,

The present invention relates to a releasing agent spraying apparatus for a hot forging die, and more particularly, to a hot-forging spraying apparatus for hot forging a hot- To a mold releasing device for a forging die.

As is well known, forging refers to a metal working method of forming a material into a desired shape by applying a compressive load by a mechanical method. In general, forging is performed at a temperature higher than the temperature at which recrystallization progresses in the material, Forging at a lower temperature is called cold forging.

The hot forging corresponding to the former is to heat the steel to a high temperature of 1000 ℃ ~ 1250 ℃ to reduce the deformation resistance and to make the molding easier by giving a large deformation by a small force, What can be done. And it is one of the most commonly used forging methods because it has the advantage of being able to make the molding of complicated shape with high productivity because it is fast in production speed.

The mold used for the hot forging is provided with a molding die for the maintenance of proper temperature of the die, prevention of damage due to wear of the die forming part, The liquid releasing agent is injected.

As a representative prior art relating to the above-described release agent spraying apparatus, there can be mentioned, for example, Korean Patent Application Publication No. 10-2013-0021082 (hereinafter referred to as prior art).

The prior art includes a lower die supporting a lower mold, a press located on the lower die to move up and down in a state of supporting the upper die and to form and demold the upper and lower dies, A bracket fixed to the lower die for supporting the lower mold, a shaft connected to the bracket, and coupled to the rod of the cylinder at one side thereof, And a tilting arm which is supported by the tilting arm and moves forward and backward in accordance with a tilting and rotating operation of the tilting arm, and the injection nozzle coupled to the tip is introduced into and withdrawn from the molding space of the upper and lower molds And a release agent pipe.

However, the prior art is disadvantageous in that it is not suitable as a releasing agent spraying apparatus for processing a hot forging product having a toothed shape along a peripheral surface, rather than a general hot forging product.

For example, in order to forge a gear to be formed on a circumferential surface of a gear, it is necessary to more intensively inject the releasing agent into a forming region where a tooth is to be formed. However, in the prior art, There is a problem that the structure is not suitable for machining a specific product, that is, a hot forging product having a tooth profile, due to the structure in which the release agent is injected intensively only in the center of the lower mold.

Document 1: Korean Patent Application Publication No. 10-2013-0021082

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a method of manufacturing a hot forging product, which is capable of uniformly injecting a releasing agent, And a hot forging die for injecting the releasing agent into the hot forging product.

According to an aspect of the present invention, there is provided a hot forging die for forming a tooth on an outer surface of a hot forging product having a circular shape, the hot forging die having a circular shape, A mold releasing device for a hot forging die, comprising: a reciprocating unit that reciprocally moves forward and backward in a state of being opposed to each other on the front and rear sides of the hot forging die; a connecting rod penetrating through the reciprocating unit; At least one unit passage nozzle provided at an outlet of the connecting rod for passing air and a release agent therethrough, and at least one unit passage nozzle connected to the tip of the unit passage nozzle, In a state in which it is moved upwardly of the hot forging according to forward and backward movement of the unit, And a spray nozzle for spraying the air and the release agent that have passed through the nozzle to a portion where the tooth of the hot forging product is to be formed, the spray nozzle being formed into a semicircular ring shape corresponding to the circular shape of the hot forging, The air and the release agent are concentratedly injected onto the outer surface of the hot forging product to be molded.

The present invention is configured to inject a semi-circular ring-shaped injection nozzle corresponding to the outer shape of a circular hot forging product onto the hot forging product to jet the air and the releasing agent downward so that air and air are blown to the outer surface of the hot forging product, It is possible to form a hot forging product having a precise toothed shape without causing a break of the molded product by concentrating the mold release agent.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing the entire structure of a mold releasing agent injecting apparatus for a hot forging mold for ejecting a releasing agent into a toothed hot forging according to an embodiment of the present invention; FIG.
Fig. 2 is a side view of Fig. 1; Fig.
Fig. 3 shows the plane of Fig. 1; Fig.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following detailed description, exemplary embodiments of the present invention will be described in order to accomplish the above-mentioned technical problems. And other embodiments which may be presented by the present invention are replaced by descriptions in the constitution of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing the entire structure of a mold releasing agent injecting apparatus for a hot forging mold for ejecting a releasing agent into a toothed hot forging according to an embodiment of the present invention. FIG. 2 is a cross- And Fig. 3 is a view showing the plane of Fig.

1 to 3, a hot forging mold 10 in which a releasing agent injecting apparatus of the present invention is installed includes an upper die set 20 and a lower die set 30, The upper die 22 is mounted on the lower surface of the upper die set 20 and the lower die 32 is mounted on the upper surface of the lower die set 30, The lower molds 22 and 32 perform mutual molding and demolding.

In the meantime, among the hot forging products that are placed on the lower die 32 in a state where a plurality of the die injectors 100 are arranged to face each other between the upper and lower die sets 20 and 30 A place where the toothed member 202 is to be formed in the hot forged product 200 when the hot forged product 200 (for example, a gear) having a toothed shape along the outer surface in a circular shape is raised on the lower metal mold 32 That is, the outer surface of the hot forging product), in order to uniformly and uniformly spray the releasing agent.

As described above, the injecting apparatus 100 of the present invention has the same structure, and a plurality of injecting apparatuses are arranged before and after the hot forging die 10. In the following description, the injection apparatus 100 is disposed in front of the hot forging die 10 The structure of the single injecting device 100 will be described.

The upper die set 10 is lowered and the upper and lower dies 14 and 16 are joined to each other to form a hot forged product After the upper die set 10 is lifted and lowered, a sensor (not shown) senses the upper die set 10 and outputs a signal to a control unit (not shown) (40) is driven so that the injection nozzle (70) of the release agent dispensing apparatus (100) enters the lower mold (32) and the air and the release agent are sprayed.

The mold release agent dispensing apparatus 100 includes a connector 42, a supply hose 44, a unit passage nozzle 60, and a spray nozzle 70.

The connection port 42 is connected to the supply hose 44 and the injection nozzle 70 through the reciprocal 40 so that a supply hose 44 is connected to the end of the connection hose 44 and at least one The unit passing nozzles 70 are provided.

The supply hose 44 is a hose for supplying air and a releasing agent to the connection port 42 in accordance with the signal of the control unit described above. The branch hose 44 is provided at the inlet of the supply hose 44, An air hose 48 for supplying air and a releasing agent hose 50 for supplying the releasing agent are connected to the supply hose 46 to supply the air and the releasing agent to the supply hose 44 through the branch pipe 46 The outlet of the supply hose 44 is coupled to the end of the connection port 42 to supply the air and the release agent to the connection port 42.

The unit passage nozzle 60 is connected to the tip of the connection port 42 and allows the air and the releasing agent supplied from the connection port 42 to pass through the injection nozzle 70, It is preferable to configure one or more of them to be connected.

The injection nozzle 70 is connected to the tip of the unit passage nozzle 60. A plurality of injection holes 72 are formed at the lower end of the unit passage nozzle 60 at a predetermined distance, Air and a releasing agent are supplied to the hot forging product 200 and the air and the releasing agent are concentratedly injected into a portion where the tooth 202 is to be formed in the hot forging product 200 which is raised in the molding space of the lower mold 32 through the injection hole 72.

That is, the injection nozzle 70 is formed into a ring shape corresponding to the outer shape of the hot forged product 200 raised in the molding space of the lower mold 32, so that the toothed member 202 is formed (I.e., the outer surface of the hot forging product), the release agent can be uniformly injected evenly.

The apparatus for injecting a releasing agent of a hot forging die for ejecting a releasing agent into a toothed hot forging product of the present invention having the above-described structure comprises a hot forging part 200 for forming a tooth 202 on the outer surface of the hot forging part 200, The upper and lower molds 22 and 32 are joined to each other and the teeth 202 are formed on the outer surface of the hot forged product 200. When the upper die set 20 is lowered, ) Is forged.

Then, when the upper die set 20 moves up and down and the upper and lower dies 14 and 16 are demolded, the sensor senses this and outputs a signal to the control unit. The control unit controls the front and rear of the hot forging die 10 The injection nozzle 70 constituting the mold releasing agent injecting apparatus 100 provided in the carriage 40 is moved forward by moving the reciprocating carriage 40 provided in a state of facing each other on the lower mold 32, And then the air and the releasing agent are supplied to the supply hose 44 of the releasing agent dispensing apparatus 100. [

The air and the releasing agent supplied to the supply hose 44 are supplied to the injection nozzle 70 via the connecting port 42 and the unit passage nozzle 60. The air and the releasing agent supplied to the injection nozzle 70 are supplied to the lower part The injection nozzle 70 is formed into a ring shape corresponding to the shape of the outer surface of the circular hot forging product 200. In this case, The hot forging product 200 is uniformly and uniformly sprayed to the to-be-formed product 200 at the place where the tooth 202 is to be formed (i.e., the outer surface of the hot forged product) .

10: hot forging mold 20; Upper die set
22: Upper mold 30: Lower die set
32: lower mold 40:
42: Connector 44: Supply hose
46: branch tube 60: unit passage nozzle
70: injection nozzle 100: ejecting agent injection device
200: Hot forging

Claims

The hot forging product 200 loaded in the lower mold 32 of the hot forging mold 10 in the hot forging mold 10 for forming the toothed portion 202 on the outer surface of the hot forged product 200 having a circular shape, In which the air and the releasing agent are injected into the mold,
A reciprocating pedestal (40) reciprocating forward and backward in a state of being opposed to each other before and after the hot forging die (10);
A connecting rod 42 which is inserted through the reciprocating stage 40;
A supply hose 44 installed at an inlet of the linkage 42 and supplying air and a release agent to the linkage 42;
At least one or more unit passage nozzles (60) installed at the outlet of the linkage (42) and passing the air and the release agent supplied to the linkage (42);
The unit passage nozzle 60 is connected to the front end of the unit passage nozzle 60 and moves in the upward direction of the forging part 200 according to the forward and backward movement of the reciprocating unit 40, And an injection nozzle (70) for injecting air and a releasing agent into a portion of the hot forging product (200) where a tooth shape is to be formed;
The injection nozzle 70 is formed into a semicircular ring shape corresponding to the circular shape of the hot forged product 200 and concentrates the air and the releasing agent on the outer surface of the hot forged product 200, And the injection of the releasing agent into the hot forging die is performed.