KR101720258B1

KR101720258B1 - Forming press dies with means for lifing and supporting workpiece

Info

Publication number: KR101720258B1
Application number: KR1020150132243A
Authority: KR
Inventors: 임동석
Original assignee: 성일기업(주)
Priority date: 2015-09-18
Filing date: 2015-09-18
Publication date: 2017-03-27

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a forming die used for forming a thin plate material, which can stably support a workpiece while preventing a workpiece on a lower die from being molded, And so on.
The forming die is a die for forming one end of a workpiece, and is a lower die for supporting a lower end of the workpiece; An upper mold for pressing the upper surface of the one end of the workpiece to be placed on the lower mold, the upper mold moving up and down on the lower mold; A first elastic supporter disposed vertically through the lower mold and elastically moving up and down; And a variable supporter supporting the other end of the workpiece before the workpiece is pressed by the upper mold.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forming die having a supporting and lifting means,

The present invention relates to a forming die used for forming a thin plate material, and more particularly, to a forming die used for molding a thin plate material, in which a workpiece is stably supported without interfering with a workpiece on a lower die, And a supporting and lifting means for allowing easy separation.

The steel sheet used to make the body and frame of an automobile is used for drawing, forming, restriking, trimming and piercing so as to have the shape and strength as designed. .

Among them, the foaming process is the most important process for making the steel sheet into a desired shape. As shown in Fig. 1, the foaming process is a process in which a workpiece W is placed on a lower mold L having a shape that engages with a lower surface shape of a designed product, And pressurizing the workpiece with the upper die U.

If the shape of the designed product is complicated, the foaming process should be performed sequentially through the forming molds having the gradually varying shape. If too much foaming process is performed, a large number of forming molds are required, If the foaming process is carried out with too little steps, the degree of change of the workpiece during molding by one foaming mold is large, so that a part of the workpiece can not be supported due to the shape of the forming mold considering this.

On the other hand, since the workpiece pressed by the upper mold in the forming process is tightly adhered to the lower mold, there is a problem that it is troublesome to separate the workpiece from the lower mold.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art as described above, and it is an object of the present invention to provide a method and apparatus for stably supporting a workpiece having a large degree of change during a forming process, It is an object of the present invention to provide a forming die having support and lifting means that can be separated.

According to a preferred embodiment of the present invention, there is provided a mold for forming one end of a workpiece, comprising: a lower mold for supporting a lower surface of a workpiece; An upper mold for pressing the upper surface of the one end of the workpiece to be placed on the lower mold, the upper mold moving up and down on the lower mold; A first elastic supporter disposed vertically through the lower mold and elastically moving up and down; And a variable support which supports the other end of the workpiece before the workpiece is pressed by the upper mold.

According to another embodiment of the present invention, the variable supporter includes a fixing portion formed at an interval from the lower mold, a supporting portion hinged to the fixing portion to support the other end portion of the workpiece, And a spring for holding the tilting supporter in a horizontal state, wherein the supporting and lifting means comprises:

According to another embodiment of the present invention, at one side of the lower mold, a second elastic support frame supporting the other end of the workpiece after the workpiece is pressed by the upper mold and elastically moving up and down together with the first elastic support Is provided with a support and lifting means.

According to another embodiment of the present invention, there is provided a forming mold including a supporting and lifting means, characterized in that the upper end of the second elastic support is made of a cushioning material.

It is not necessary to consider the degree of rotation of the other end of the workpiece when molding the one end of the workpiece, so that it is possible to make a large change in the workpiece in one lower and upper molds, have.

The workpiece placed on the lower mold of the forming mold can be stably supported as a whole, but the forming process is not hindered by the support of the workpiece.

The workpiece that has undergone the forming operation can be easily separated from the lower mold by the first elastic support base formed through the lower mold and the second elastic support base formed on the lower mold side.

1 is an explanatory view of a conventional foaming process.
2 is a sectional view of a forming mold according to the present invention.
FIGS. 3A to 3C are explanatory diagrams illustrating a process of forming a workpiece using the forming mold. FIG.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a forming die used for molding a thin plate into a designed shape, and when a designed shape is complicated and needs to be subjected to a multi-step forming process, It is possible to prevent the molding operation from being disturbed by the end portion, to stably support the entire workpiece, and to easily separate the formed workpiece from the forming mold.

2 is a cross-sectional view of a forming mold 1 according to the present invention.

The forming metal mold 1 according to the present invention comprises a lower mold 10, an upper mold 20, a first elastic support 30, and a variable support 40.

The forming metal mold 1 is for forming one end of the workpiece 2 and one end of the workpiece 2 on which the forming is performed is supported by the lower mold 10 and is moved up and down on the lower mold 10. [ 20). The upper surface of the lower mold 10 is formed in a shape to engage with the lower surface of the planned workpiece 2 and the lower surface of the upper mold 20 is formed in a shape to engage with the upper surface shape of the planned workpiece 2, (2) is pressed between the lower mold (10) and the upper mold (20).

The lower mold 10 is provided with a through hole having a vertical through hole and a first elastic support base 30 elastically moving upward and downward is disposed in the lower mold 10. The lower support 10 and the upper mold 20 are provided with variable supports 40). The height of the upper surface of the variable supporter 40 is formed to be equal to the height of the other end of the workpiece 2 before it is pressed by the upper die 20 in a state of being mounted on the lower die 10, And supports the other end of the workpiece before it is pressed by the workpiece.

This forming mold 1 forms the workpiece 2 by the following process. 3A to 3C show a process of forming the workpiece 2 by the forming metal mold 1 according to the present invention in order.

The forming process of the workpiece 2 includes the steps of: (i) mounting the workpiece 2 on the lower mold 10 with the upper mold 20 being spaced apart from the lower mold 10 (Fig. 3A); Ii) moving the upper die 20 in contact with the lower die 10 to pressurize the workpiece 2 (Fig. 3b); And iii) moving the topsheet 20 in place (FIG. 3c).

The lower mold 10 and the upper mold 20 which support and press only one end of the workpiece 2 are formed by forming one end of the workpiece 2 so that the angle formed with the end of the workpiece 2 is different, And does not prevent the other end from rotating. It is therefore unnecessary to consider the degree of rotation of the other end of the workpiece 2 to be formed by one lower mold 10 and the upper mold 20. Thus, (2) can be greatly changed, so that the foaming process can be reduced.

The workpiece 2 to which only one end portion is fixed to the lower die 10 can be stably supported at the other end by the variable support pedestal 40 as shown in Fig. It is possible to prevent an unbalanced stress that may occur when only one side of the support member is supported.

The upper end of the first elastic supporter 30 moves upward and protrudes above the upper surface of the lower mold 10 when the upper mold 20 is not in contact with the lower mold 10, The upper surface of the variable support table 40 is formed to have the same height as the other end portion of the workpiece 2 in this state.

The first elastic supporter 30 includes a support portion 31 protruding from the upper surface of the lower mold 10 or inserted into the lower mold 10 and an elastic portion 32 formed as a spring under the support portion 31, It is possible to move sexually.

As shown in Fig. 3B, when the upper die 20 presses the workpiece 2 and one end of the workpiece 2 is deformed, the other end of the workpiece 2 is rotated. The variable support 40 supports the other end of the workpiece 2 only before the workpiece 2 is pressed, so that the other end of the workpiece 2 is not blocked from rotating.

More specifically, the variable supporter 40 includes a fixing part 41 formed at a distance from the lower mold 10, a supporting part 41 hinged to the fixing part 41 to support the other end of the workpiece 2, A tilting support portion 42 tilted together by being pressed by the workpiece 2 and a spring 43 for maintaining the tilting support portion 42 in a horizontal state.

The tilting support portion 42 is hinged to the fixed portion 41 and is rotatable. When the tilting support portion 42 is not applied with a large force, the tilting support portion 42 is rotated by a spring (not shown) connecting the fixed portion 41 and the tilting support portion 42 43 so as to support the other end of the workpiece 2 and tilted when a large force is applied by the workpiece 2 pressed by the upper die 20, 2) to rotate. When the rotation of the other end of the workpiece 2 is increased and the other end of the workpiece 2 moves away from the tilting support portion 42, the tilting support portion 42 is returned to the horizontal state by the elastic force of the spring 43 do.

The stepped portion 44 is formed in the fixing portion 41 so that the angle at which the tilting support portion 42 is tilted by the workpiece 2 and tilted by the elastic force of the spring 43 can be limited . The oblique direction step 44 limits the angle at which the workpiece 2 is pressed and tilted and the horizontal step 44 limits the angle at which the spring 43 tilts due to the elastic force. 3B shows a state in which the tilting support portion 42 is in a horizontal state due to the elastic force of the spring 43. The tilting support portion 42 is tilted by the workpiece 2, The maximum angle of incidence is indicated by a dotted line.

The spring 43 may be a coil-like tension spring as in FIG. 2 or the like, but may be a leaf spring for supporting the lower surface of the tilting support portion 42, or a gas spring.

It is preferable that the end edge of the tilting support portion 42 facing the lower die 10 is formed to be round so that the workpiece 2 can smoothly move away from the tilting support portion 42 and rotate.

When the upper die 20 presses the workpiece 2, the first elastic supporter 30 in the lower die 10 is pressed together so that its upper end is located at the same height as the upper surface of the lower die 10.

The variable support base 40 may be a fixed portion formed at a distance from the lower die 10 and a slide type support which horizontally moves toward or away from the lower die 10 at the fixed portion. The slide type support stand is located near the lower die 10 before the workpiece 2 is pressed to support the other end of the workpiece 2 and moves away from the lower die 10 when the workpiece 2 starts to be pressed So that the other end of the workpiece 2 can be rotated. This slide type support can be controlled by the control device in accordance with the movement of the upper die 20.

When the upper mold 20 is pressed by the upper mold 20 and the upper mold 20 returns to its original position as shown in Fig. 3C, the upper end of the first elastic supporter 30, due to its elastic force, So that the work pieces 2 are moved upward together. The workpiece 2 is brought into close contact with the upper die 20 and the lower die 10 by the pressing of the upper die 20 and is brought into close contact with the lower die 10. However, when the first elastic support base 30 is in contact with the workpiece 2 Is separated from the lower die 10, so that the workpiece 2 can be easily separated from the lower die 10.

One end of the lower mold 10 supports the other end of the workpiece 2 after the workpiece 2 is pressed by the upper mold 20 and moves elastically up and down together with the first elastic support 30 A second resilient support 50 may be located.

2, the second elastic supporter 50 is positioned between the lower mold 10 and the variable supporter 40 and the height of the upper supporter 50 is lower than the height of the upper end of the tilting supporter 42 of the variable supporter 40 And is pressed by the other end of the workpiece 2 while supporting the other end of the pressurized workpiece 2.

When the upper die 20 is returned to its original position after pressing the workpiece 2, one end of the workpiece 2 is pressed by the first elastic support base 30, The end portion is lifted while being supported by the second elastic supporter 50 so that the workpiece 2 is moved by the same distance as a whole so that the workpiece 2 rubs against the lower mold 10 by being tilted to one side when the workpiece 2 moves There is no possibility.

The upper end of the second elastic supporter (50) may be made of a buffer material (51).

As described above, when the upper die 20 presses the workpiece 2, the other end of the workpiece 2, which rotates about one end of the workpiece 2 to be deformed, moves away from the tilting support portion 42 The second elastic supporter 50 is moved to the second elastic supporter 50, and the impact may be generated when the rotation speed of the other end of the workpiece 2 is fast and reaches the second elastic supporter 50.

The upper end of the second elastic supporter 50 made of the cushioning material 51 relaxes the impact generated when the workpiece 2 reaches the second elastic supporter 50 and the possibility that the workpiece 2 is deformed Can be prevented.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled 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. And thus fall within the scope of the present invention.

1: forming mold 2: workpiece
10: lower mold 20: upper mold
30: first elastic support 40: variable support
41: fixing part 42: tilting support part
43: spring 50: second elastic support
51: Cushioning material

Claims

A mold for forming one end of a workpiece,
A lower mold (10) for supporting one end surface of the workpiece;
An upper die 20 for vertically moving on the lower die 10 for pressing the upper surface of one end of the workpiece which is placed on the lower die 10;
A first elastic supporter 30 disposed vertically through the lower mold 10 and elastically moving up and down; And
A lower support 10 and a variable support 40 located at one side of the upper die 20 and supporting the other end of the workpiece before the workpiece is pressed by the upper die 20,
The variable supporter 40 includes a fixing part 41 formed at an interval from the lower mold 10, a supporting part 41 hinged to the fixing part 41 to support the other end of the workpiece, And a spring (43) for holding the tilting supporter (42) in a horizontal state. The forming and lifting device according to claim 1,

delete

The method according to claim 1,
One end of the lower mold 10 is provided with a second elastic support frame 50 which elastically supports the other end portion of the workpiece after the workpiece is pressed by the upper mold 20 and moves together with the first elastic support frame 30 And a lifting means for lifting the support member.

The method of claim 3,
Characterized in that the upper end of the second resilient support (50) is made of a cushion material (51).