KR101696721B1

KR101696721B1 - metallic mold for side piercing work

Info

Publication number: KR101696721B1
Application number: KR1020150092969A
Authority: KR
Inventors: 제은모; 김지원
Original assignee: (주) 엠에스텍
Priority date: 2015-06-30
Filing date: 2015-06-30
Publication date: 2017-01-16
Also published as: KR20170002964A

Abstract

The mold according to the present invention can maintain a uniform piercing alignment by simultaneously performing left and right piercing and can reduce manufacturing cost due to the mold size and manufacturing cost of the press corresponding to the mold, The compressed air can be injected into the hollow space, and the scrap generated by the piercing can be easily discharged.

Description

Metal mold for side piercing work

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mold technology, and more particularly, to a mold technique capable of performing simultaneous piercing on left and right sides and easily discharging scrap generated by piercing.

Conventionally, when piercing both sides of the left and right sides, the left and right sides are divided and the piercing process is performed through the two steps. Two steps are required for side piercing in the second process, so two left and right side piercing dies are required. At this time, since the structure of the side piercing die is divided into left and right, it is thicker in the piercing process which receives a lot of force.

Conventional side piercing processing in which the left and right side piercing processing is divided into left and right side piercing has a problem that the piercing alignment is not uniform and the size of the mold becomes large and the production cost of the press corresponding to the mold production cost and the mold becomes high There is a drawback that it is inevitable. In addition, the conventional side piercing process has a disadvantage in that a relatively large number of troubles occur in continuous operation.

Korean Patent Publication No. 10-2002-0093652

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an apparatus and a method for manufacturing a press capable of maintaining a uniform piercing alignment by simultaneously performing left and right piercing, In addition, it is another object of the present invention to provide a side piercing die capable of easily discharging scrap generated by piercing.

The technical objects to be achieved by the present invention are not limited to the technical matters mentioned above, and other technical subjects which are not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

According to an aspect of the present invention, there is provided a mold including a half hollow die, a left / right cam punch, and a left / right sliding module. can do.

The half-punch die is provided at the center of the upper metal mold and includes left and right punch through holes formed symmetrically on the left and right sides of the body and a lower hollow for scrap discharging formed to a height reaching at least the left and right punch through- And can be inserted into the object to be processed as the upper mold is lowered.

The left and right cam punches are provided on the upper mold and are capable of lowering along the lowering of the upper mold while providing a force for side piercing to the lower mold.

Each of the left and right sliding modules is provided symmetrically on the left / right side of the lower mold, and a corresponding one of the left and right piercing punches can be coupled. The left and right sliding modules are slid symmetrically at the same time based on a force applied by the lowering of the left and right side cam punches so that the left and right side punching punches are pushed into the machining object And a side piercing operation that passes through the left / right punch through hole and penetrates through the lower hollow.

The semi-rigid die may include at least one air supply hole for injecting compressed air for discharging scrap generated by the side piercing operation through the lower hollow into the lower hollow.

Wherein said semi-spherical die comprises a plurality of air supply holes each of which is smaller than said lower hollow and which injects compressed air from said upper surface of said semi-spherical die into said lower hollow, May be less than the long axis length of the lower hollow.

The side piercing die is disposed between the left and right sliding modules and is contracted on the basis of a force provided by the left and right cam punches as the upper die is lowered. And / or the right-side cam punch is removed, elastic means for restoring the left / right sliding module to the original position.

The left / right sliding module is mounted on a sliding groove provided in the lower mold, and is movable in the left / right direction by a force provided by the left / right cam punch in the sliding groove and an elastic force provided by the elastic means. As shown in Fig.

The side piercing die is provided at the center of the lower die, the workpiece having the semi-hollow die inserted therein is inserted, the scrap discharged from the semi-hollow die is discharged to the lower side, The right side surface may further include a hollow lower die provided with the left and right piercing punch guide holes which reciprocate left and right to perform a side piercing operation.

The side piercing mold according to the present invention can maintain a uniform piercing alignment by simultaneously performing left and right piercing and can reduce the manufacturing cost of the mold due to the size of the mold and the manufacturing cost of the press corresponding to the mold There is an advantage.

The mold for side piercing according to the present invention is advantageous in that scrap generated by piercing can be easily discharged by injecting compressed air into the hollow of the die.

1 is a bottom view of an upper mold of a mold for side facing according to the present invention.
2 is a bottom view of a lower mold of a mold for side piercing according to the present invention.
3 is a side view of a mold for side piercing according to the present invention.
4 is a view for explaining a side piercing operation using a side piercing die according to the present invention.
Figure 5 shows examples of semi-rigid dies of a mold for side piercing according to the present invention.
Fig. 6 shows examples of air supply holes formed in a semi-rigid die of a mold for side piercing according to the present invention.
FIG. 7 shows an actual photograph of a top / bottom mold of a mold for side piercing according to the present invention.
8 is an enlarged view of a part of the upper mold of the mold for side piercing according to the present invention.
Fig. 9 is an enlarged view of a semi-rigid die provided in the upper mold of the mold for side piercing according to the present invention.
10 is an enlarged view of a part of a lower mold of a mold for side piercing according to the present invention.

For a better understanding of the present invention, its operational advantages and features, and the objects attained by the practice of the present invention, reference should be made to the accompanying drawings, which form a preferred embodiment of the invention, and the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a bottom view of an upper mold 100 of a mold for side facing according to the present invention. 2 is a bottom view of the lower mold 200 of the mold for side piercing according to the present invention. 3 is a side view of a mold for side piercing according to the present invention.

The components of the upper mold 100 and the lower mold 200 shown in FIG. 1 are not essential, so that the upper mold 100 and the lower mold 200 may have more or less components than the upper mold 100 and the lower mold 200 It is possible. Hereinafter, the components will be described in order.

The upper mold 100 is equipped with a half hollow type die 110 and cam punches 120 to 123. More specifically, the half-die 110 may be fixed by the punch fastening plate 150 and the back plate 140. The punch fixing plate 150 and the back plate 140 may serve as a stripper.

The half-punch die 110 is provided at the center of the upper mold 100 and includes left and right punch through holes 112 and 113 symmetrically formed on the left and right sides of the body and at least the left and right punch through holes And a lower hollow (111) for scrap discharge formed up to a height reaching the holes (112) and (113). Since the hollow is formed only in the lower portions of the left and right punch through holes 112 and 113, the upper portion of the half-punch die 110 can have stronger mechanical characteristics than the lower portion.

The semi-spherical die 110 includes at least one air supply hole (not shown) for injecting compressed air for discharging scrap generated by the side piercing operation through the lower hollow 111 to the lower hollow 111, (114). The supply of the compressed air to the air supply hole 114 may be performed through the compressed air supply path 160 provided in the upper mold 100. According to this compressed air injection mechanism, the mold for side processing according to the present invention can more easily discharge the scrap generated by the side piercing.

In the examples of FIGS. 1 to 4, only one air supply hole is included in the semi-spherical die 110, but each of the half hollow spherical dies 110 has a small number of the lower hollow beams 111, A plurality of air supply holes for injecting compressed air from the upper surface of the half-die 110 into the lower hollow 111 may be included. Preferably, the major axis length of each of the plurality of air supply holes is larger than the major axis length of the lower hollow. The strength of the upper section where the air supply hole is formed can be made higher than the strength of the lower section where the lower hollow is formed. With this structural feature, the mechanical stability of the semi-rigid die can be ensured and the durability can be increased.

The cam punches 120 to 123 may be lowered along with the descent of the upper mold 100 to provide a force for side piercing to the lower mold 200. The cam punches 120 to 123 may be fixed to a punch holder 130. Meanwhile, between the punch holder 130 and the punch fixing plate 150 and the back plate 140, they may be connected by elastic means such as a spring.

The left sliding module 210, the right sliding module 220, the elastic means 230, and the lower die 240 are formed on the lower mold 200. Each of the left and right sliding modules 210 and 220 is provided symmetrically on the left and right sides of the lower mold. More specifically, the left and right sliding modules 210 and 220 are mounted on sliding grooves formed in the lower mold 200, and the left and right side sliding modules 210 and 220 are provided in the sliding groove with the left and right cam fins 120 to 123 It can reciprocate only in the left / right direction by the provided force and the elastic force provided by the elastic means 230, and can not move in the vertical direction. Such a configuration can reduce the possibility of alignment being lost even after multiple side piercing.

The left and right sliding modules 210 and 220 are coupled with corresponding piercing punches 213 and 223 of the left and right piercing punches. The left sliding module 210 is formed with cam punch receiving structures 211, 212, 221, and 222 at positions corresponding to the cam punches 120 to 123, respectively.

The left and right sliding modules 210 and 220 receive a force applied by the lowering of the left and right cam punches 120 to 123 through the cam punch receiving structures 211, 212, 221, and 222, The left and right piercing punches 213 and 223 are slid symmetrically so that the left and right piercing punches 213 and 223 penetrate through the machining object and the left and right punch through holes 112 and 123, 111) through the side piercing operation. That is, the piercing of the left and right piercing molds according to the present invention is performed not by the movement of the piercing punch (or the punch module) but by the left and right reciprocating motion of the sliding module mounted on the groove and movable only in the left and right direction.

The elastic means 230 is connected to the left and right sliding modules 210 and 220 and is connected to the left and right cam punches 120 to 123 by a downward force of the left and right cam punches 120 to 123 . At this time, side piercing to the object to be processed is performed. Then, when the force provided by the left and right cam punches is removed as the upper mold 100 is lifted, the elastic means 230 returns the left and right sliding modules 210 and 220 to their original positions .

The lower die 240 is provided at the center of the lower die. In the lower die 240, a workpiece having the half-die 110 inserted therein is inserted into the upper portion, and scrap discharged from the half-die 110 is discharged to the lower portion. That is, the lower die 240 has a hollow structure and an upper and lower open structure.

Left and right side piercing punches 213 and 223 guide holes 241 and 242 are formed on left and right sides of the lower die 240 to reciprocate left and right to perform a side piercing operation. One end of the left and right piercing punches 213 and 223 is inserted into the guide holes 241 and 242 before the piercing is performed. The left and right piercing punches 213 and 223 move along the guide holes 241 and 242 to pierce the left and right sides of the object to be processed. After the piercing is performed, the left and right piercing punches 213 and 223 return to the initial state along the guide holes 241 and 242.

As described above with reference to Figs. 1 to 3, the mold for side piercing according to the present invention has the effect that the scrap is easily discharged because strong air is inserted through the air supply hole, It is easy to fit both side piercing alignments and it is possible to reduce the manufacturing cost of side piercing punches, dies and molds, because it is possible to process both sides of the piercing process through one process,

4 is a view for explaining a side piercing operation using a side piercing die according to the present invention.

4 (a) shows a stand-by state for performing side piercing. 4A, the lower mold 200 having the upper mold 100 and the left and right sliding modules 210 and 220 provided with the half-hollow die 110 and the cam punches 120 and 122, Are spaced apart from one another.

4 (b) shows a side piercing performing state. When the upper mold 100 descends, the semi-hollow die 110 is inserted into the lower die 240 together with the object to be processed. Then, the cam punches 120 and 122 are lowered to apply force to the cam punch receiving structures 212 and 222. Then, the left / right side sliding modules 210 and 220 are simultaneously slid symmetrically, and left / right side piercing is simultaneously performed.

Then, compressed air is injected from an air supply hole 114 provided in the half-burnishing die 110 to the lower hollow 111 from above the half-burning die 110. Then, scrap can be discharged from the lower hollow 111 more easily. Then, when the upper mold 100 rises, the state of the mold is restored to the original state by the elastic means 230 as shown in FIG. 4 (a).

Figure 5 shows examples of semi-rigid dies of a mold for side piercing according to the present invention.

At least one air supply hole 114 is formed in a rectangular parallelepiped-type half-hollow die. The air supply hole 114 is formed to reach the lower hollow 111 from the upper surface of the semi-spherical die 110. 5A, the lower hollow 111 has a rectangular parallelepiped shape having a constant width. In the example of FIG. 5B, the lower hollow 111 has a rectangular column shape with a wider width as it goes downward In the example of FIG. 5 (c), the lower hollow 111 may have an elliptical column shape in which a width of the lower hollow 111 is reduced. On the other hand, the width of the lower hollow (111) widens toward the bottom to facilitate scrap discharge and to eliminate unnecessary interference between the workpiece and the piercing punch, which may occur during the piercing process.

5, each of the air supply holes 114 is smaller in size than the lower hollow 111, and the length of the major axis of all the air supply holes 114 formed in the half- May be larger than the long axis length of the lower hollow (111). This is to reduce the strength drop due to the lower hollow 111 formed in the lower section of the semi-spherical die 110.

Fig. 6 shows examples of air supply holes formed in a semi-rigid die of a mold for side piercing according to the present invention.

Referring to FIG. 6, there is shown an example in which an air supply hole is formed in a semi-spherical die 110 having a rectangular, circular or elliptical upper surface. It can be seen that the air supply holes are formed at symmetrical positions with respect to each other in the upper surface portion of the semi-spherical die 110. This is to allow scrap to be easily discharged through the lower hollow 111 of the half-die 110 through symmetrical compressed air injection.

FIG. 7 shows an actual photograph of a top / bottom mold of a mold for side piercing according to the present invention.

A semi-rigid die 110 is provided at the center of the upper mold 100, and the cam punches 120 to 123 are symmetrically arranged around the die. The left and right sliding modules 210 and 220 in the lower mold 200 are provided symmetrically in the sliding groove and the lower die 240 is provided at a position corresponding to the half mold die 110, At positions corresponding to the punches 120 to 123, cam punch receiving structures 211, 212, 221, and 222 are formed.

The left sliding modules 210 are connected to each other by two elastic means 230. When the force is transmitted to the cam punch receiving structures 211, 212, 221, and 222 by the downwardly moving cam punches 120 to 123, the elastic means 230 contracts and the left and right sliding modules 210 And 220 are moved to the center while the side piercing is performed. After the piercing is performed, the left and right sliding modules 210 and 220 are returned to their original state by the elastic means.

8 is an enlarged view of a part of the upper mold of the mold for side piercing according to the present invention. Fig. 9 is an enlarged view of a semi-rigid die provided in the upper mold of the mold for side piercing according to the present invention.

The cam punch symmetrically provided in the upper mold 100 has a cam slope in the center direction for transmitting a sliding force to the cam punch receiving structure. Although not shown in the drawing, the lower mold 200 is provided with a cam punch receiving structure having an inclination corresponding to the inclination of the cam punch.

On the other hand, a lower hollow for scrap discharging is provided in the lower part of the half-hollow die 110. Further, a left punch through hole 112 is formed in a side surface of the half-punch die 110. On the opposite side, although not shown in the photograph, another right punch through hole 113 is formed. The lower hollow 111 and the punch through holes 112 and 113 are connected to each other. The upper hollow portion of the semi-hollow die 110 is connected to the lower hollow portion 111 by at least one air supply hole.

10 is an enlarged view of a part of a lower mold of a mold for side piercing according to the present invention.

In the lower mold 200, the left and right sliding modules 210 and 220 are connected to each other through the elastic means 230. One end of the piercing punches 213 and 223 attached to the left and right sliding modules 210 and 220 is provided at the center of the lower mold 200 and the other end of the lower die 240 It is inserted into the punch guide.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

100: Upper mold 110: Semi-hollow die
120, 121, 122, 123: cam punch 200: lower mold
210, 220: Left / right sliding module 213, 223: Left / right piercing punch
230: elastic means 240: lower die

Claims

A left and right punch through hole formed symmetrically on the left and right sides of the body and a lower hollow for discharging scrap formed up to at least a height from the lower surface to the left and right punch through holes, A half hollow type die inserted into a workpiece as the die descends;
A left and right cam punch provided on the upper mold and lowering along the lowering of the upper mold to provide a force for side piercing to the lower mold; And
A left / right piercing punch provided symmetrically on the left / right sides of the lower mold and slid symmetrically at the same time based on a force applied when the corresponding cam punch of the left / right cam punch is engaged, And a left / right sliding module for performing a side piercing operation to penetrate the right piercing punch through the machining object in which the half-punch die is inserted and the left / right punch through hole to the lower hollow,
The mold is fixed to the center of the lower mold and has a hollow shape opening upward and downward. The semi-hollow die is inserted into the upper part, the scrap is discharged to the lower part, And a hollow lower die provided with a guide hole for guiding the reciprocating motion of the right-handed piercing punch,
Wherein the semi-hollow die is provided to communicate with the lower hollow and is relatively smaller than the inner diameter of the lower hollow, and at least one air supply to which the compressed air is injected so that scrap generated by the side- Wherein a ball is formed on the side surface of the mold.

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The method according to claim 1,
The air supply holes are plural,
Wherein the long axis length of each of the plurality of air supply holes,
Is greater than the major axis length of the lower hollow.

The side piercing tool according to claim 1,
A left sliding module connected between the left and right sliding modules,
And is contracted based on a force provided by the left / right cam punch according to the descent of the upper mold,
Further comprising an elastic means for returning the left / right sliding module to the original position when the force provided by the left / right cam punch is removed as the upper mold is lifted.

5. The sliding module of claim 4, wherein the left /
A lower mold mounted on a sliding groove formed in the lower mold,
Wherein the stopper is capable of reciprocating only in a left / right direction by a force provided by the left / right cam punch in the sliding groove and an elastic force provided by the elastic means.

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