KR102349430B1 - Cam drive rotation type bending mold with product change - Google Patents

Abstract

The present invention relates to a bending mold for commonly using a cam drive rotary material, which can adjust the amount of springbuck compensation, comprising: a lower die; a lower mold fixed to an upper part of the lower die; an upper die; an upper mold for closely supporting an upper surface of a plate; and a bending punch supported to protrude downward on the upper die.

Description

Bending mold that can share cam drive rotary material {CAM DRIVE ROTATION TYPE BENDING MOLD WITH PRODUCT CHANGE}

The present invention relates to a bending mold in which a cam drive rotary material can be shared, and more particularly, the degree of protrusion of the cam drive is changed so that the springback compensation amount can be adjusted according to the material of the sheet material to be bent in one mold. It relates to a bending mold capable of sharing a cam drive rotating material that can change the front and rear positions of the inclined cam surface in contact with the bending punch by rotating the drive horizontally.

In general, press working is a type of plastic working operation that mainly cuts a plate-like material or deforms the shape of a plate using a press mold, for example, shearing, punching, trimming, bending. , burring (burring), curling (curling), embossing (embossing), coining (coining) and can be processed in various forms such as deep drawing (deep drawing).

Among them, bending molding is a molding method that bends or bends a plate-shaped material, that is, a plate material as its name suggests.

1 and 2 are side views showing the structure and operation process of a conventional bending mold shown in Korean Patent No. 10-1545086 (Aug. 17, 2015 announcement), which is a bending mold of the most general and simple structure. , fixedly installed lower die (1), and is fixedly installed on the upper part of the lower die (1), so that the bending portions (B) of the left and right ends to be bent of the plate (S) protrude to both sides of the plate (S) A lower die 2 supporting the lower surface, an upper die 3 that moves up and down according to a vertical load from above the lower die 2, and a lower portion of the upper die 3 to face the lower die 2 up and down The upper mold 4 is installed so as to be movable up and down, and closely supports the upper surface of the plate material S according to the downward movement of the upper die 3, and the upper mold 3 is adjacent to the left and right ends of the upper mold 3 . Both sides of the plate material (S) that protrude downward from both ends of the die (3), and are closely supported and fixed between the upper die (4) and the lower die (2) according to the downward movement of the upper die (3) It is made to include a punch (5) for bending by pressing the bending portion (B).

That is, as shown in FIG. 1, in a state in which the upper die 3 is moved upward, the plate S is placed on the lower mold 2, and a vertical load is applied to the upper die 3 as shown in FIG. The upper die 4 and the punch 5 are moved downward. First, the upper die 4 closely supports the upper surface of the plate material S supported by the lower die 2, and when the upper die 3 goes further down, the upper die 4 and the lower die 2 are in close contact with each other and punch (5) is pressed and pressed to the side of the lower mold (2) while in contact with the bending portions (B) protruding from both ends of the plate (S) and bent. After that, in a state in which the upper die 4 and the lower die 2 closely support the plate S according to the upward movement of the upper die 3, the punch 5 rises first, and then the upper die 3 continues. When the upper die (4) is separated from the lower die (2) due to a constant upward movement, the bent plate material (S) is taken out from the lower die (2).

However, in the bending mold according to the prior art described above, the punch 5 moves only vertically while being fixed to the upper die 3 to vertically bend the bending part B of the plate S, so the plate S The bent bending portion (B) is in a vertically bent state.

At this time, the bent plate material (S) is a metal such as steel, and a springback phenomenon that tries to return to the original state after plastic working occurs. That is, when the bending portion B of the plate material S is bent by the punch 5, it is bent at 90 degrees, but after the punch 5 rises, the bending portion B of the plate material S is bent according to the springback phenomenon. will open outward.

In order to catch this springback phenomenon, a technique is used that induces the punch to descend and advance using a cam drive to press the bending part (B) of the plate material (S) in the lateral direction. In No. 20-0115936 (published on December 16, 1996), "a bending press machine with a movable cam drive" has been proposed.

However, there is a different springback compensation amount depending on the material of the plate material for bending, the prior art has a problem in that it is difficult to adjust the springback compensation amount so that two or more materials can be bent in one mold.

On the other hand, the power transmission means in the mold according to the prior art usually uses an air cylinder. Such an air cylinder has a variable structure and a cylinder exposed to the visible part, so it is vulnerable to contamination, and the wiring is exposed around the mold and is complicated. It is difficult to organize, and there is a concern that foreign objects may be caught around the exposed wiring and cause product defects due to contamination, and accidents may occur when changing materials.

The present invention has been devised to solve the problems of the prior art as described above, and an object of the present invention is to achieve common use of cam drive rotary materials that can bend plates having different materials in a single mold while easily adjusting the amount of springback compensation. It is to provide a possible bending mold.

Another object of the present invention is to provide a bending mold capable of sharing a cam drive rotating material having a cam block rotating means capable of easily driving a cam drive without using an air cylinder or the like.

In order to achieve the above object, according to the present invention, there is provided a bending mold capable of sharing a cam drive rotary material with a lower die; a lower mold fixed to the upper part of the lower die and supporting the lower surface of the plate material so that the bending part of the plate material to be bent protrudes to one side, the lower mold having a springback inclined surface inclined inward from the bending edge of one side toward the lower part; an upper die moving up and down from the upper side of the lower mold; an upper mold which is installed movably in the lower part of the upper die so as to face the lower mold up and down, and closely supports the upper surface of the plate material according to the downward movement of the upper die; In the bending mold including a bending punch supported to protrude downwardly to the upper die at an upper position of the bending portion of the plate, the bending punch is supported by the upper die to move back and forth by a predetermined distance, and a first An inclined cam surface is formed, and is supported by the lower die at a lower position of the bending punch, and a second inclined cam surface corresponding to the first inclined cam surface is formed at the upper front end of the bending punch, and when the bending punch is moved downward, the second inclined a cam drive in which the first inclined cam surface abuts against the cam surface and guides the bending punch to move forward in a direction toward the springback inclined surface; a material commonization unit capable of adjusting the front and rear positions of the second inclined cam surface in contact with the first inclined cam surface so as to have different springback correction amounts according to the material of the plate; The material sharing unit further comprises: a rotation shaft for rotatably supporting the cam drive in a horizontal direction; and cam block rotation means for rotating the cam drive about the rotation shaft about the rotation axis, the cam drive , formed in the shape of a polygonal prism, wherein the second inclined cam surface is formed on at least two or more upper edge portions, respectively, and the length from the rotation shaft to each side surface on which the second inclined cam surface is formed is formed to be different from each other.

Here, the cam drive is formed in the shape of a quadrangular prism, and the second inclined cam surface is formed on two upper corners adjacent to each other, and the length from the rotation shaft to each side surface on which the second inclined cam surface is not formed is mutually exclusive. A backup block that is formed in the same way, and the material commonization part is fixed to the lower die and supports the side located at the rear with respect to the springback inclined surface among the two side surfaces on which the second inclined cam surface of the cam drive is not formed. The cam drive is configured to further include, wherein one of the two side surfaces on which the second inclined cam surface is not formed is rotated about the rotation axis in a state in which one side is supported by the backup block, and the other side is the It is characterized in that the corner portion where the two side surfaces where the second inclined cam surface is not formed is formed with a cut round portion having a certain curvature so as to be supported by the backup block.

Here, the cam drive and the rotation shaft are paired with each other and are arranged in plurality according to the shape of the plate material, and the cam block rotation means is installed on each of the plurality of rotation shafts and rotates integrally with the rotation shaft. A plurality of driven pulleys and , It characterized in that it is configured to include a belt or chain interconnecting the plurality of driven pulleys so that the plurality of driven pulleys are interlocked and rotated, and a driving unit for driving the belt or chain by a user's operation.

Here, the drive unit includes a drive pulley contacting the belt or chain to drive the belt or chain when rotated, and a tensioner for movably supporting the drive pulley back and forth so as to adjust the tension of the belt or chain; , a worm wheel installed on a rotating shaft of the driving pulley to rotate integrally with the driving pulley, a worm gear having a longitudinal direction arranged in a forward and backward movement direction of the driving pulley to mesh with the worm wheel, and a drive to rotate the worm gear by external force It is characterized in that it is configured to include a handle.

According to the above configuration, the bending mold capable of sharing the cam drive rotational material according to the present invention has a structure that can change the front and rear positions of the inclined cam surface in contact with the bending punch by rotating the cam drive horizontally in one mold. It has the advantage of being able to easily adjust the amount of springback compensation for plates of different materials.

In addition, the bending mold that can share cam drive rotary materials according to the present invention uses a belt or chain instead of an air cylinder for power transmission, so there is no pneumatic wiring around the mold, so it has a simple, spring-free structure and linear operation is possible. There is this.

1 and 2 are side views showing the structure and operation process of a bending mold according to the prior art;
3 is a side view illustrating the structure and operation process of a bending mold capable of sharing a cam drive rotary material according to an embodiment of the present invention;
4 is a perspective view of a main part of a bending mold capable of sharing a cam drive rotary material according to an embodiment of the present invention;
5 is a plan view showing the operation process of a main part of a bending mold capable of sharing a cam drive rotary material according to an embodiment of the present invention;
6 is a perspective view illustrating an operating state of a tensioner according to an embodiment of the present invention;

Hereinafter, with reference to the embodiment shown in the drawings, a bending mold capable of sharing a cam drive rotary material according to the present invention will be described in more detail.

3 is a side view showing the structure and operation process of a bending mold capable of common use of a cam drive rotary material according to an embodiment of the present invention, and FIG. 4 is a bending that can share a cam drive rotary material according to an embodiment of the present invention It is a perspective view of the main part of the mold, and FIG. 5 is a plan view showing the operation process of the main part of the bending mold capable of sharing the cam drive rotary material according to an embodiment of the present invention, and FIG. 6 is the operation of the tensioner according to an embodiment of the present invention. It is a perspective view showing the state.

3 to 6, a bending mold capable of sharing a cam drive rotatable material according to an embodiment of the present invention includes a lower die 10, a lower die 20, an upper die 30, an upper die 40 and , a bending punch 50 , a cam drive 60 , and a material commonization unit 70 .

The lower die 10 is configured to be fixedly installed on the floor. In an embodiment of the present invention, the lower die 20 and the cam drive 60 are installed at the upper portion of the lower die 10 .

The lower mold 20 is fixed to the upper portion of the lower die 10, and is configured to support the lower surface of the plate material S so that the bending portion B of the plate material S to be bent protrudes to one side.

In an embodiment of the present invention, as shown in FIG. 3 , the lower mold 20 has a springback inclined surface 22 that is inclined inward from the bending edge 21 of one side toward the lower part.

The springback inclined surface 22 is configured to further bend the bending portion B of the plate S by a certain distance t by 90 degrees or more in consideration of the springback phenomenon of the plate S. .

The upper die 30 is configured to move vertically above the lower die 20. In an embodiment of the present invention, the upper die 30 includes the upper die 40 and the bending punch 50 at the lower portion. is installed

The upper die 40 is elastically installed in the lower portion of the upper die 30 so as to face the lower die 20 up and down, and according to the downward movement of the upper die 30, the plate material (S) is formed. It is a configuration that closely supports the upper surface.

The bending punch 50 is configured to protrude downwardly and supported by the upper die 30 at the upper position of the bending part B of the plate material S.

In one embodiment of the present invention, the bending punch 50 is supported by the upper die 30 to be movable back and forth by a predetermined distance, and a first inclined cam surface 51 is formed at the lower rear portion thereof.

When the bending punch 50 is lowered, the first inclined cam surface 51 abuts against the second inclined cam surface 61 of the cam drive 60 and moves forward in a direction toward the springback inclined surface 22 . .

It is preferable to use the elastic force of a spring (not shown) to return to the rear in the state in which the bending punch 50 is advanced.

The cam drive 60 is supported by the lower die 10 at a lower position of the bending punch 50 , and a second inclined cam surface 61 corresponding to the first inclined cam surface 51 is formed on the upper front end of the cam drive 60 . When the bending punch 50 is moved downward, the first inclined cam surface 51 is in contact with the second inclined cam surface 61 and the bending punch 50 is directed toward the springback inclined surface 22. It is a configuration that induces forward movement.

In the present invention, the cam drive 60 is formed in a polygonal column shape, and the second inclined cam surface 61 is formed in at least two or more upper corners, respectively. In one embodiment of the present invention, the cam drive ( 60) is formed in the shape of a quadrangular prism, and the second inclined cam surface 61 is formed in two upper corners adjacent to each other.

Meanwhile, as shown in FIG. 5 , the cam drive 60 has different lengths d1 and d3 from the rotation shaft 71 to the respective side surfaces 60a and 60b on which the second inclined cam surface 61 is formed. is formed (d3 = d1 + α), and lengths d2 and d4 from the rotation shaft 71 to the respective side surfaces 60c and 60d on which the second inclined cam surface 61 is not formed are equal to each other (d4=d2).

When the cam drive 60 is rotated around the rotation shaft 71 by the configuration of the cam drive 60 as described above, the second inclined cam surface 61 in contact with the first inclined cam surface 51 is The front and rear positions can be adjusted.

In addition, in an embodiment of the present invention, the cam drive 60 has a round portion cut with a certain curvature at the corner where the two side surfaces 60c and 60d where the second inclined cam surface 61 is not formed meet. 62) is formed.

As shown in FIG. 5 due to the configuration of the round part 62, the cam drive 60 is installed on either side of the two side surfaces 60c and 60d on which the second inclined cam surface 61 is not formed. In a state in which 60c) is supported by the backup block 73 , the rotation shaft 71 is rotated around the rotational center, and the other side 60d is supported by the backup block 73 .

The material commonization unit 70 can adjust the front and rear positions of the second inclined cam surface 61 in contact with the first inclined cam surface 51 so as to have different springback correction amounts depending on the material of the plate S. there is a configuration

In an embodiment of the present invention, the material commonization unit 70 is configured to include a rotating shaft 71 , a cam block rotating means 72 , and a backup block 73 .

The rotation shaft 71 is configured to rotatably support the cam drive 60 in the horizontal direction. In an embodiment of the present invention, the rotation shaft 71 is the The cam drive 60 is arranged eccentrically at one corner with respect to the plane, and the length d1 of the cam drive 60 to the respective side surfaces 60a and 60b on which the second inclined cam surface 61 is formed with respect to the rotation shaft 71 . , d3) are formed differently (d3 = d1+α), and the lengths d2 and d4 to the respective side surfaces 60c and 60d on which the second inclined cam surface 61 is not formed are the same. (d4=d2).

On the other hand, in one embodiment of the present invention, the cam drive 60 and the rotation shaft 71 are mutually mated and arranged in plurality according to the shape of the plate material S, and mutually by the cam block rotation means 72 . works in conjunction.

The cam block rotation means 72 is configured to rotate the cam drive 60 around the rotation shaft 71. In an embodiment of the present invention, a driven pulley 721, a chain 722, and a drive It is configured to include a unit (reference numeral not shown).

A plurality of driven pulleys 721 are installed on each of the plurality of rotation shafts 71 and are configured to rotate integrally with the rotation shaft 71 .

The chain 722 is configured to interconnect the plurality of driven pulleys 721 so that the plurality of driven pulleys 721 are interlocked and rotated.

The chain 722 may be configured as a belt (not shown).

The driving unit (not shown) is configured to drive the chain 722 by a user's manipulation. In an embodiment of the present invention, a driving pulley 723, a tensioner 724, and a worm wheel 725 and , is configured to include a worm gear 726 and a driving handle 727 .

The driving pulley 723 is configured to be in contact with the chain 722 to drive the chain 722 when rotated.

The tensioner 724 is configured to support the driving pulley 723 so as to be able to move back and forth so that the tension of the chain 722 can be adjusted.

6 shows the operating state of the tensioner 724 according to an embodiment of the present invention, the tensioner 724 according to an embodiment of the present invention is a tensioner block 724a and the tensioner block 724a. A moving length hole 724b long cut in the front-rear direction, a moving block 724c that is movably supported by the moving length hole 724b in a state in which the driving pulley 723 is supported, and a user's operation It is configured to include a tension adjustment bolt (724d) capable of moving the moving block (724c) back and forth.

The worm wheel 725 is installed on the rotation shaft of the drive pulley 723 and rotates integrally with the drive pulley 723 .

The worm gear 726 is arranged in the longitudinal direction in the front-rear movement direction of the driving pulley 723 to mesh with the worm wheel 725 .

Even if the drive pulley 723 is moved in the front-rear direction by the tensioner 724 by the combination of the worm wheel 725 and the worm gear 726, the rotational motion of the worm gear 726 is applied to the drive pulley 723. be able to transmit

The drive handle 727 is configured to rotate the worm gear 726 by an external force.

The user can easily adjust the amount of springback compensation for plates having different materials in one mold by rotating the cam drive 60 in a simple way of rotating the driving handle 727 .

In the present invention, by using the chain 722 driving method instead of an air cylinder as in the prior art for power transmission, there is no pneumatic wiring around the mold, so linear operation is possible with a simple, spring-free structure.

The backup block 73 is fixed to the lower die 10 to describe the second side surface 60c of the cam drive 60 on which the second inclined cam surface 61 is not formed. , 60d) of which is configured to support the side surface 60c located at the rear with respect to the springback inclined surface 22 .

The bending punch 50 is lowered and the first inclined cam surface 51 of the bending punch 50 is engaged with the second inclined cam surface 61 of the cam drive 60 to apply an external force to the cam drive 60 rearward. Even if this works, since the backup block 73 supports it, it is possible to prevent the cam drive 60 from being pushed backward as well as to prevent damage to the rotation shaft 71 .

The cam drive rotational material sharing possible bending mold described above and shown in the drawings is only one embodiment for carrying out the present invention, and should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is defined only by the matters described in the claims below, and improved and changed embodiments without departing from the gist of the present invention are obvious to those of ordinary skill in the art to which the present invention belongs. It will be said that it falls within the protection scope of the present invention.

S plate
B bending part
10 lower die
20 Ha Hyung
21 bending edge
22 springback slope
30 upper die
40 pictograph
50 bending punch
51 First inclined cam surface
60 cam drive
61 2nd inclined cam surface
62 rounds
70 Material Commonization Department
71 axis of rotation
72 cam block rotating means
721 driven pulley
722 chain
723 drive pulley
724 tensioner
725 worm wheel
726 worm gear
727 drive handle
73 backup block

Claims (4)

Habudaiwa; a lower mold fixed to the upper part of the lower die and supporting the lower surface of the plate material so that the bending part of the plate material to be bent protrudes to one side, and has a springback inclined surface inclined inward from the bending edge of one side toward the lower mold; an upper die moving up and down from the upper side of the lower mold; an upper mold which is installed elastically and vertically on the lower part of the upper die so as to face the lower mold up and down, and closely supports the upper surface of the plate material according to the downward movement of the upper die; In a bending mold including a bending punch supported by the upper die to protrude downward from the upper position of the bending portion of the plate,
The bending punch is supported so as to be movable back and forth by a predetermined distance on the upper die, and a first inclined cam surface is formed in the lower rear portion,
A second inclined cam surface corresponding to the first inclined cam surface is formed on the upper end of the front surface of the bending punch supported by the lower die at a lower position of the bending punch, and the first inclined cam surface is formed on the second inclined cam surface when the bending punch moves downward. a cam drive abutting the cam surfaces and guiding the bending punch to move forward in a direction toward the springback inclined surface;
a material commonization unit capable of adjusting the front and rear positions of the second inclined cam surface in contact with the first inclined cam surface so as to have different springback correction amounts according to the material of the plate; including more,
The material commonization unit is configured to include a rotating shaft for rotatably supporting the cam drive in a horizontal direction, and a cam block rotating means for rotating the cam drive around the rotating shaft,
The cam drive is formed in a quadrangular prism shape, wherein the second inclined cam surface is formed on two upper corners adjacent to each other, and the length from the rotation shaft to each side surface on which the second inclined cam surface is not formed is the same. The length from the rotation shaft to each side surface on which the second inclined cam surface is formed is formed to be different from each other,
The material commonization unit further includes a backup block fixed to the lower die and supporting a side positioned at the rear with respect to the springback inclined surface among two side surfaces on which the second inclined cam surface of the cam drive is not formed. becomes,
The cam drive is rotated around the rotation axis in a state in which one side of the two side surfaces on which the second inclined cam surface is not formed is supported by the backup block, and the other side is supported by the backup block. A bending mold capable of sharing a cam drive rotatable material, characterized in that a rounded portion having a predetermined curvature is formed at a corner portion where the two side surfaces where the second inclined cam surface is not formed to make it possible. delete The method of claim 1,
The cam drive and the rotation shaft are paired with each other and are arranged in plurality according to the shape of the plate material,
The cam block rotating means includes a plurality of driven pulleys installed on each of the plurality of rotation shafts and rotated integrally with the rotation shafts, and a belt or chain interconnecting the plurality of driven pulleys so that the plurality of driven pulleys are rotated in interlock with each other. and a driving unit for driving the belt or chain by a user's manipulation. 4. The method of claim 3,
The drive unit includes a drive pulley contacting the belt or chain to drive the belt or chain when rotated, and a tensioner for movably supporting the drive pulley back and forth so as to adjust the tension of the belt or chain; A worm wheel installed on the rotation shaft of the drive pulley to rotate integrally with the drive pulley, a worm gear whose longitudinal direction is disposed in the forward and backward movement direction of the drive pulley to mesh with the worm wheel, and a drive handle for rotating the worm gear by external force A bending mold capable of sharing a cam drive rotational material, characterized in that it comprises a.

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