KR20140129831A - Apparatus for forming materials - Google Patents

Abstract

The present invention provides an apparatus for forming a material, comprising: a lower mold having a forming space where a material is mounted on the upper part; and an upper mold arranged in the upper part of the lower mold and installed to be elevated, and for press forming the material in a multi-stage by entering the forming space as descended.

Description

{APPARATUS FOR FORMING MATERIALS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material forming apparatus, and more particularly, to a material forming apparatus capable of improving moldability of a material.

Generally, generally, the molding of the plate material proceeds in a manner that a desired shape is obtained by using a press mold.

When a plate material is molded using a press mold, the lubrication of the entire plate material is determined by the lubricant application state of the raw material.

The material is molded in various shapes through each press die.

Particularly, when forming a steel sheet used as a material for automobiles, it is helpful to improve the quality by reducing the springback phenomenon in the part to be bent and formed.

A prior art related to the present invention is Korean Patent Laid-Open Publication No. 10-2006-0110929 (published on October 26, 2006), and the prior art discloses a press apparatus having a spring-back preventing function .

An object of the present invention is to provide a material forming apparatus capable of improving the moldability of a material by molding the material into multiple stages.

In a preferred aspect of the present invention, the present invention provides a molding apparatus comprising: a lower portion on which a molding space is formed, on which a material is placed; And an upper mold disposed at an upper portion of the lower mold portion so as to be able to move up and down and to enter into the molding space as it is lowered to press-mold the material in multiple stages.

Wherein the upper mold comprises an upper mold body having a flow space formed therein and an exposure hole formed therein for exposing the flow space downwardly, an upper body disposed to be able to move up and down in the flow space, An outer pressurizing body protruding from a lower end of the upper mold body so as to surround the periphery of the exposure hole and press-molding an outer region surrounding a central region of the material positioned in the molding space; And an elastic member installed in the flow space and elastically supporting the upper wall of the flow space and the upper end of the central pressing body such that the lower end of the central pressing body is projected out of the exposure hole.

The center pressurized body includes a support body, an engaging body formed at the upper end of the support body and resiliently supported by the elastic member, a pressing member formed at the lower end of the support body for press- .

Wherein the supporting body is raised and lowered in a state of being fitted in the flow hole and the engaging body is engaged with the upper end of the engaging jaw, .

It is preferable that the pressing member forms a curvature such that the lower end is formed to be convex along the lower side.

It is preferable that the center pressurized body includes a stroke adjusting unit.

Wherein the stroke adjusting section comprises a first adjusting block having a first thickness at an upper wall of the flow space and a second adjusting block provided at an upper end of the engaging body and having a second thickness and being in contact with a lower end of the first adjusting block, It is preferable to have an adjustment block.

Preferably, the first adjusting block is connected to a length adjusting bolt screwed to the upper end of the upper body, and the upper and lower positions of the first adjusting block vary according to the direction of the length adjusting bolts.

It is preferable that the elastic member is elastically deformed when it forms an abnormal pressing force at the time of completing the press-molding with respect to the central region of the work.

The present invention has the effect of effectively preventing the springback phenomenon in the outer region of the material by multi-step pressure-molding the material to be seated on the lower portion sequentially from the central region and the outer region.

Further, the present invention has an effect of effectively preventing occurrence of scratches, cracks, and the like on the surface of a material when the material is pressure-molded.

1 is a schematic view showing the construction of a material forming apparatus according to the present invention.
Fig. 2 is a cross-sectional view showing a top part according to the present invention. Fig.
Figs. 3 to 5 are views showing a multi-stage mold-up molding process for a material.
6 is a partial cross-sectional view showing an example in which the vertical position of the first adjusting member according to the present invention is adjusted.

Hereinafter, a material forming apparatus of the present invention will be described with reference to the accompanying drawings.

1 is a schematic view showing the construction of a material forming apparatus according to the present invention.

Referring to FIG. 1, the material forming apparatus of the present invention includes a lower mold 100 and a top mold 200.

The lower part (100) has a molding space (110). The molding space 110 is formed at a predetermined depth and shape along the lower side from the upper end of the lower portion 100.

The upper end of the lower portion 100 forms a region where the steel material 10 is seated.

A holder 120 is disposed at an upper end of the lower portion 100. The holder 120 can be elevated by an elevator not shown.

The holder 120 may be in close contact with the upper end of the lower portion 100 positioned in the peripheral region of the molding space 110.

Accordingly, the holder 120 closely contacts and holds the material 10 placed on the upper end of the lower portion 100.

An upper portion 200 is disposed on the lower portion 100. The upper mold 200 may be disposed at the upper portion of the molding space 110 and may be located at the center of the holder 120.

The upper part 200 is connected to the elevating device 300. The elevating device 300 serves to raise and lower the upper part 200.

The upper mold part 200 is lowered by the driving of the elevating device 300 and enters the inside of the molding space 110 to press the material 10 into a predetermined shape by multi-stage pressure molding.

The configuration of the image forming unit 200 will be described in detail.

Fig. 2 is a cross-sectional view showing a top part according to the present invention. Fig.

Referring to FIG. 2, the upper portion 200 includes a upper body 210, a central body 220, an outer body 230, and an elastic member 240.

The upper body 210 is connected to the lifting device 300 described above.

A flow space 211 is formed in the upper body 210. An exposed hole 212 is formed in the lower end of the upper body 210. The exposure hole 212 and the flow space 211 are connected to each other.

Accordingly, the flow space 211 is exposed to the lower portion of the upper mold body 210 through the exposure hole 212.

A locking step 211a is formed on the inner wall of the flow space 211.

The center pressurized body 220 is arranged to be able to move up and down in the flow space 211.

The center pressurized body 220 includes a support body 221, an engagement body 222, and a pressing body 223.

The support body 221 has a predetermined length along the vertical direction.

The engaging body 222 is formed at the upper end of the supporting body 221.

The cross-sectional area of the support body 221 is larger than the cross-sectional area of the support body 221. Therefore, the engaging body 222 is formed to be stepped from the upper end of the supporting body 221.

The pressing body 223 is formed at the lower end of the supporting body 221.

The lower end of the pressing body 223 is convexly formed along the lower side to form a constant curvature. The portion forming the convex curvature is a portion which is pressed and brought into close contact with the central region of the material (10).

Here, a flow hole 211b is formed at the center of the latching protrusion 211a so as to be vertically connected to the exposure hole 212. [

The support body 221 is disposed so as to pass through the flow hole 211b and to be able to move up and down while being fitted in the flow hole 211b.

The engaging body 222 is arranged to be hooked on the upper end of the engaging step 211a inside the flow space 211. [

The pressing body 223 is positioned inside the exposure hole 212 under the engaging protrusion 211a.

The outer pressing body 230 is formed to protrude downward from the lower end of the upper body 210 by a predetermined length.

The outer pressing body 230 is formed to protrude by a predetermined length so as to surround the periphery of the exposure hole 212 and surround the periphery of the pressing member 223.

The outer periphery of the outer pressing body 230 is formed to be tapered, and has a predetermined curvature.

The elastic member 240 is disposed inside the flow space 211 and elastically supports the upper wall of the flow space 211 and the upper end of the engagement body 222 with each other.

Accordingly, the central pressurized body 220 can be elastically moved up and down in a state of being elastically supported by the elastic member 240.

Here, the elastic member 240 is formed so as to be elastically deformed when it forms an abnormal pressing force at the time of completion of the press forming with respect to the central region of the work 10. [

On the other hand, the central pressing body according to the present invention has a stroke adjusting section.

The stroke adjusting unit 250 includes a first adjusting block 251 and a second adjusting block 252.

The first adjustment block 251 forms a first thickness t1 and the second adjustment block 252 forms a second thickness t2.

The cross-sectional area of the first and second control blocks 251 and 252 is smaller than the cross-sectional area of the flow space 211.

The first adjustment block 251 is installed on the upper wall of the flow space 211.

The second adjusting convex 252 is installed at the upper end of the receiving body 222 so as to face the first adjusting block 251.

Next, the operation of the material forming apparatus having the above-described structure will be described.

Figs. 3 to 5 are views showing a multi-stage mold-up molding process for a material.

Referring to FIG. 3, the upper portion 200 is in a state of being waiting at the upper portion of the lower portion 100.

Here, a material 10, which is a steel sheet, is seated on the upper end of the lower portion 100.

The elastic member 240 in the upper part 200 forms a relaxed state so that the pressing member 223 of the jaw pressing body 220 protrudes downward from the upper body 210 do.

Referring to FIG. 4, the elevating device 300 moves down the top portion 200 downward.

While the upper mold 200 is lowered, the central pressurized body 220 primarily enters the interior of the molding space 110 while pressing the central region of the material 10.

At this time, the elastic member 240 is in an uncompressed state. That is, the elastic member 240 is designed in advance so as to be elastically deformed when it forms an abnormal pressing force at the time of completion of the press-molding with respect to the central region of the material 10. [

The pressing member 223 of the central pressing body 220 is lowered while pushing down the central region of the workpiece 10 and finally the central region of the workpiece 10 is pressed against the center of the molding space 110 And can be brought into close contact with the bottom surface.

Accordingly, the central region of the work 10 can be primarily press-molded by the pressing member 223 whose lower end is convexly formed with a constant curvature.

5, when the molding body 210 is further lowered, the elastic member 240 installed in the internal flow space 211 of the molding body 210 may be compressively deformed.

Accordingly, the central pressing body 220 can be gradually inserted into the inside of the flow space 211 while the elastic member 240 is being compressed.

At the same time, the molding body 210 is lowered and the outer pressing body 230, which is protruded from the lower end of the molding body 210, can press-mold the outer region of the material 10 secondarily.

Accordingly, the material 10 can be secondarily press-formed by press-forming the outer region.

Accordingly, the center region of the material 10 and the outer region surrounding the central region are sequentially formed in a multi-step fashion, so that the springback phenomenon at the bent corner in the molding space 110 can be effectively reduced.

The central region of the workpiece 10 is basically formed by using the center pressurized body 220 and then the corner portion of the workpiece 10 is formed by using the outer pressed body 230 having various shapes. The desired shape of the corner portion can be formed.

Here, although not shown in the drawing, the outer pressing body 230 may be detachable from the lower end of the molding body 210. The detachment method may be a bolt fastening method or a sliding fastening method.

Accordingly, there is an advantage that the outer pressing body 230 having various shapes can be replaced at the lower end of the upper body 210.

Further, the embodiment according to the present invention can prevent the occurrence of excessive scratches or cracks on the surface of the workpiece at the time of molding because the corner portions of the workpiece are formed during the secondary press forming.

Meanwhile, in the present invention, as described above, the upper and lower stroke distances of the central pressurized body 220 used in the primary press forming can be regulated or adjusted.

That is, the upper portion 200 according to the present invention may have the stroke adjusting portion 250.

The stroke adjusting unit 250 includes a first adjusting block 251 having a first thickness t1 on an upper wall of the flow space 211 and a second adjusting block 252 disposed on an upper end of the locking body 222, And a second adjustment block 252 having a thickness t2 and contacting the lower end of the first adjustment block 251. [

The total thickness of the first and second thicknesses t1 and t2 may be designed to be substantially equal to the thickness t of the pressing member 223. [

Therefore, it is possible to restrict the time point of the primary press forming.

6, the first adjusting block 251 according to the present invention may be connected to a length adjusting bolt 253 screwed to an upper end of the upper body 210.

In addition, the position of the first adjusting block 251 may be varied in accordance with the direction of the length adjusting bolts 253.

With reference to the above configuration, the vertical adjustment position of the first adjustment block 251 in the flow space 211 can be varied by adjusting the direction in which the length adjustment bolts 253 are coupled.

That is, the first thickness t1 'corresponds to a sum of the thickness t1 of the first adjusting block itself and the vertical length t0 adjusted by the elevation.

Accordingly, in the present invention, the time and the time of the primary press-molding with respect to the central region of the work 10 can be adjusted by varying the stroke distance of the center pressurized body 220 when the work is elevated.

The embodiment according to the present invention has an advantage in that it is possible to easily adjust the forming time of the corner portion by adjusting the degree of primary pressing according to the type of the material to be press molded.

Although specific embodiments of the material forming apparatus of the present invention have been described above, it is apparent that various modifications can be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

10: Material 100: Lower part
110: molding space 120: holder
200: upper mold part 210: upper mold part body
211: flow space 212: exposure hole
211a: Retaining jaw 211b: Flow hole
220: central pressurizing body 221: support body
222: engaging body 223: pressing member
230: outer pressing body 240: elastic member
250: stroke adjusting unit 251: first adjusting block
252: second adjusting block 253: length adjusting bolt

Claims (7)

A lower portion on which a molding space is formed and on which a workpiece is placed; And
And an upper mold disposed at an upper portion of the lower mold to be able to move up and down and to enter into the molding space as it is lowered to press-mold the material in multiple stages.
The method according to claim 1,
The top-
An upper mold body having a flow space formed therein and formed with an exposure hole for exposing the flow space downward,
A central pressurizing body arranged to be able to move up and down in the flow space, for press-molding a central region of the material placed in the forming space,
An outer pressing body protruding from a lower end of the upper mold body so as to surround the periphery of the exposure hole and press-molding an outer region surrounding a center region of the material positioned in the molding space;
And an elastic member installed in the flow space and elastically supporting the upper wall of the flow space and the upper end of the central pressing body such that the lower end of the central pressing body is protruded from the exposed hole. Device.
3. The method of claim 2,
The center pressurized body includes:
And a pressing member which is formed at a lower end of the supporting body and which press-forms a central region of the work,
Wherein an inner wall of the flow space is formed with a latching protrusion on which a flow hole communicating with the exposure hole is formed,
Wherein the support body is lifted and lowered in a state of being fitted in the flow hole,
And the engaging body is arranged to be hooked on the upper end of the engaging jaw.
The method of claim 3,
The pressing member
And a curvature is formed so that the lower end is convexly formed along the lower side.
The method of claim 3,
Wherein the center pressurized body has a stroke adjusting unit,
Wherein the stroke-
A first adjustment block having a first thickness at an upper wall of the flow space,
And a second adjusting block provided at an upper end of the engaging body and having a second thickness and contacting the lower end of the first adjusting block.
6. The method of claim 5,
Wherein the first adjustment block comprises:
And a length adjusting bolt which is screwed to an upper end of the upper body,
Wherein a position of the first adjusting block in a vertical direction is changed according to a direction of the length adjusting bolts.
3. The method of claim 2,
The elastic member
Wherein the elastic material is deformed elastically when forming a pressing force which is equal to or more than a pressing force at the time of completion of the pressing of the central region of the material.

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