KR102429212B1 - Press system - Google Patents

Abstract

The present invention relates to a press system capable of internally supporting a processed object to improve processing precision, wherein the press system comprises a work table having a longitudinal fitting groove formed on the upper surface; and a pressing unit disposed above the work table and vertically pressed while facing the work table.

Description

A press system that can support the inside of the workpiece {Press system}

The present workpiece relates to a press system capable of supporting the inside of the workpiece.

A bending machine refers to a machine that bends a workpiece at an angle desired by a user by applying pressure to one side of the flat plate-shaped workpiece, and in particular, is widely used to bend a workpiece of a metal material.

According to such a conventional bending machine, the workpiece is once disposed on the upper side of the die, and the pressing part is pressed in the direction of the die at a vertical position corresponding to the groove part to bend the workpiece.

The bending angle of such a workpiece can be adjusted by adjusting the shape of the groove portion or the pressing force.

Here, when the workpiece is a metal material, the bending action occurs on the outer surface of the bent outer surface and the compression action occurs on the inner surface, and the conventional bending machine has the following problems.

Even if the same pressure is applied to the workpiece by the pressing part according to the physical properties such as thickness, tensile strength, compressive strength, elongation, etc. of the workpiece, the bending angle is different. Therefore, the conventional bending machine is controlled by the control unit whenever the type of workpiece is changed. It is necessary to correct the numerical value, and even in this case, there is a problem that processing precision is not guaranteed.

In addition, there is a problem that the processing precision is not guaranteed because there is a problem that the workpiece flows to the rear side when bending under pressure through the pressing part.

The present invention has been devised to solve the above problems, and by grasping the physical properties of the workpiece by itself, the workpiece can have a bending angle desired by the operator, and the workpiece is supported once more from the rear side, so that the precision of processing To provide a press system that can support the inside of a workpiece with a high

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

A press system capable of supporting the inside of a workpiece according to an embodiment of the present invention includes: a workbench having a fitting groove formed on an upper side thereof in the longitudinal direction; and a pressing unit disposed on the upper side of the workbench and pressed in the vertical direction while looking at the workbench.

The press system capable of supporting the inside of the workpiece according to an embodiment of the present invention may be characterized in that a concave groove corresponding to the longitudinal direction of the fitting groove is formed on the bottom surface of the pressing part facing the work table.

The press system capable of supporting the inside of the workpiece according to an embodiment of the present invention is formed in a shape corresponding to the fitting groove so that the upper surface is bent in a 'V' shape and a predetermined depth is inserted into the fitting groove of the work table. The lower mold on which the workpiece is placed; an upper mold fitted into the concave groove and arranged to be slidable left and right to press the workpiece in the direction of the lower mold according to the vertical movement of the pressing part; a rail formed in the longitudinal direction at the rear side of the upper mold and the lower mold; an inner support that is formed in a “__” shape, is seated on the rail, slides left and right, and supports a workpiece located between the lower mold and the upper mold from the inside; a sensor disposed on the bottom surface of one side of the concave groove facing the work table to sense the bending angle of the workpiece when the upper mold is moved; and a control unit configured to adjust the pressing force of the pressing unit by calculating physical properties of the processing object using the bending angle of the processing object detected by the sensor.

In one embodiment, the control unit receives the bending angle of the workpiece in a state pressed by the upper mold and the bending angle of the workpiece in a state in which the upper mold is spaced apart from the workpiece from the sensor, the bending angle It may be characterized in that the pressing force of the pressing part is controlled by calculating the physical properties of the workpiece by the difference.

The press system capable of supporting the inside of the workpiece according to an embodiment of the present invention is installed at each corner of the bottom of the body constituting the lower part of the workbench to provide vibration or shock from the floor and vibration or shock from the pressing unit. It may further include; a shock-absorbing part having an elastic body therein.

In one embodiment, the impact offset portion, the upper plate is formed in the form of a flat plate to which the lower portion of the body is coupled to the upper side; a case spaced apart from the lower side of the upper plate and forming an internal space; and an upper plate support bar coupled to a support plate of an elastic body in the inner space of the case, the upper part of which is exposed to the upper side of the case, and supporting the upper plate by using an elastic force.

In one embodiment, the elastic body includes a first metal plate, a second metal plate, a third metal plate and a fourth metal plate formed of a 'B'-shaped metal plate, and spaced apart to face each other so that the rear ends of each are disposed as a whole '+' support to form an outer shape; an absorbing part installed between each metal plate of the supporting part and another metal plate to absorb vibration or shock; Between the upper part of the first metal plate and the upper part of the second metal plate, between the front end of the second metal plate and the front end of the third metal plate, between the lower part of the third metal plate and the lower part of the fourth metal plate, and the front end of the fourth metal plate and the first metal plate a connecting metal plate that is installed to be able to rotate two by two between the front ends of each and connects each metal plate in a '+' shape; The upper and front ends of the first metal plate, the upper and front ends of the second metal plate, the front and lower ends of the third metal plate, and the lower and front ends of the fourth metal plate are formed to extend in the upper or lower direction as a rotating part for each metal plate in two directions. extended metal plate; Hinges installed on respective inner surfaces of the supporting plates facing each other, the upper or lower portions of the extended metal plates extending from the respective metal plates are connected to each other and are rotatably connected to each other; and a support plate on which an upper or lower surface of the rotating part is installed, and supporting the upper plate support bar and the bottom inside the case.

The above-described problem solving means are merely exemplary, and should not be construed as limiting the present application. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description.

According to one aspect of the present invention described above, the workpiece can have a bending angle desired by the operator by grasping the physical properties of the workpiece by itself, and the workpiece is supported once more from the rear side to increase the precision of the processing. It is possible to provide a press system capable of

The effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within the range apparent to those skilled in the art from the description below.

1 is a view showing a press system capable of inner support of a workpiece according to an embodiment of the present invention.
2 is a photograph showing a press system capable of supporting the inside of the workpiece according to an embodiment of the present invention.
3 is a view showing a lower mold and an upper mold of a press system capable of supporting the inside of a workpiece according to an embodiment of the present invention.
4 is a view showing a pressurizing part and an upper mold of the press system capable of supporting the inside of the workpiece according to an embodiment of the present invention.
5 is a view showing a control unit of the press system capable of supporting the inside of the workpiece according to an embodiment of the present invention.
6 is a view showing an impact offset unit according to an embodiment of the present invention.
7 is a view showing an elastic body of the impact-compensating unit according to an embodiment of the present invention.
8 is a view showing a first metal plate according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0016] Reference is made to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein with respect to one embodiment may be implemented in other embodiments without departing from the spirit and scope of the invention.

In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents to those claimed. Like reference numerals in the drawings refer to the same or similar functions throughout the various aspects.

On the other hand, throughout the present specification, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, as used herein, a “unit” for a component performs at least one function or operation. And “unit” may perform a function or operation by hardware, software, or a combination of hardware and software.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but these elements are not limited by the above-described terms. The above terminology is used only for the purpose of distinguishing one component from another component.

In the present specification, the term "comprising" is intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and includes one or more other features, number, or step. , it should be understood that it does not preclude in advance the possibility of the presence or addition of an operation, component, part, or combination thereof. When a component is referred to as being “connected” to another component, it may be directly connected or connected to the other component, but it should be understood that another component may exist in between.

In addition, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be abbreviated or omitted.

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

1 is a view showing a press system capable of inner support of a workpiece according to an embodiment of the present invention.

2 is a photograph showing a press system capable of supporting the inside of the workpiece according to an embodiment of the present invention.

3 is a view showing a lower mold and an upper mold of the press system capable of supporting the inside of the workpiece according to an embodiment of the present invention.

4 is a view showing a pressurizing part and an upper mold of the press system capable of supporting the inside of the workpiece according to an embodiment of the present invention.

5 is a view showing a control unit of the press system capable of supporting the inside of the workpiece according to an embodiment of the present invention.

6 is a view showing an impact offset unit according to an embodiment of the present invention.

7 is a view showing an elastic body of the impact-compensating unit according to an embodiment of the present invention.

8 is a view showing a first metal plate according to an embodiment of the present invention.

The press system 10 capable of supporting the inside of the workpiece according to an embodiment of the present invention is a workbench 110, a pressing unit 120, a lower mold 130, an upper mold 140, a rail 150, the inner It may include a support 160 , a sensor 170 , and a control unit 180 .

The work table 110 may have a fitting groove 111 formed on an upper surface thereof in the longitudinal direction.

The pressing unit 120 may be disposed on the upper side of the work table 110 and pressurized in the vertical direction while looking at the work table 110 . A concave groove 121 corresponding to the longitudinal direction of the fitting groove may be formed on the bottom surface of the pressing part 120 facing the work table 110 .

That is, it may be disposed spaced apart from the upper side of the work table 110 by a predetermined interval and pressurized in the direction of the work table 110 . The pressing force of the pressing unit 120 may be implemented as a pneumatic or hydraulic cylinder disposed in the housing of the press system capable of supporting the inside of the workpiece.

The lower mold 130 may be formed with a bending groove 131 bent in a 'V' shape on the upper surface thereof, and corresponds to the fitting groove 111 so that a predetermined depth is inserted into the fitting groove 111 of the work table. It is formed in a shape that is to be processed (S) can be raised.

The upper mold 140 is inserted into the concave groove 121 to be slidable left and right to press the workpiece S in the direction of the lower mold 130 according to the vertical movement of the pressing part 120 . can do.

That is, the upper mold 140 is formed in a shape corresponding to the bending groove 131 of the lower mold 130 so that a predetermined depth is inserted into the lower mold 130 , and by the movement of the pressing part 120 , the It may be pressed in the direction of the bending groove 131 .

The rail 150 may be formed on the rear side of the upper mold 140 and the lower mold 130 in the longitudinal direction.

The inner support 160 is seated on the rail 150 and slid left and right to support the workpiece S located between the lower mold 130 and the upper mold 140 from the inside.

That is, the inner support 160 is formed in a “__” shape, so that the workpiece (S) mounted on the lower mold 130 does not flow in the rear direction by pushing and supporting the workpiece (S) from the rear side. have.

Due to the presence of the inner support 160, the workpiece S does not flow during processing, so that precise bending is possible.

The sensor 170 may sense the bending angle of the workpiece S disposed above the bending groove 131 of the lower mold.

In addition, since the upper mold 140 is slidable in the pressing part 120, the sensor 170 is disposed on one side of the concave groove 121 of the pressing part to sense the bending angle of the upper surface. have.

When the sensor 170 is disposed on one side of the pressing part 120, since there is no need to sense both sides of the bent workpiece S, only one sensor 170 can be disposed, thereby reducing manufacturing costs. Alternatively, the accuracy of the detection angle may be guaranteed.

In addition, the sensor 170 is disposed on one side of the bottom surface of the concave groove 121 facing the work table 110 to sense the bending angle of the workpiece S when the upper mold 140 is moved. , in this case, it is possible to more precisely sense the bending angle of the workpiece (S) on the vertical line of the workpiece (S).

The control unit 180 may adjust the pressing force of the pressing unit 120 by calculating the physical properties of the processing object S using the bending angle of the processing object S detected by the sensor 170 , and the operation unit 181 ) and a memory unit 182 .

Specifically, the control unit 180 or the calculating unit 181 controls the bending angle of the workpiece S in a state pressed by the upper mold 140 and the upper mold 140 is spaced apart from the workpiece S. The bending angle of the workpiece (S) in the state of being processed may be received from the sensor 170 unit, and the physical properties of the workpiece (S) may be calculated as the difference between the bending angles.

For example, if the preset bending angle is 90°, once the control unit 180 controls the pressing unit 120 to bend the workpiece S to 90°, but the upper mold 140 is not bent. When spaced apart from the workpiece (S), the workpiece (S) may have an angle of 95° by the elastic force of the workpiece (S).

Since this is caused by the physical properties of the workpiece S, that is, tensile strength, compressive strength, elongation, etc., the control unit 180 or the calculating unit 181 corrects the pressing force of the pressing unit 120 to correct the pressing force of the upper mold. The pressing force of the pressing unit 120 may be controlled so that the 140 is 90° when the object S is spaced apart from the processing member S.

In addition, in order to control the pressing force more precisely and reliably, the control unit 180 or the calculating unit 181 controls the bending angle of the workpiece S in a state pressed by the upper mold 140 and the upper mold ( 140) receives the bending angle of the workpiece (S) in a state spaced apart from the workpiece (S) from the workpiece (S) a preset number of times and calculates the physical properties of the workpiece (S) as the difference in the bending angle The pressing force of the pressing unit 120 may be controlled.

That is, for the workpiece (S) having the same material and shape, for example, a correction value is calculated with the difference in bending angles of five identical workpieces (S), or sensed from the first workpiece (S). The accuracy of the pressing force can be corrected by sequentially applying the correction value calculated from the difference in the bending angle to the next workpiece S.

The final information of the same work piece S may be stored in the memory unit 182 , and the memory unit 182 may create and store a lookup table for each shape or material of the work piece S.

The press system 10 capable of supporting the inside of the workpiece according to an embodiment of the present invention may further include an impact offsetting unit 200 .

The shock canceling unit 200 is installed at each corner of the bottom of the body constituting the lower part of the work table 110, and is installed inside to absorb vibrations or shocks from the floor and vibrations or shocks from the pressing unit 120. It may have an elastic body 300 .

The impact canceling unit 200 may include an upper plate 210 , a case 220 , an upper plate support bar 230 , and an elastic body 300 .

The upper plate 210 may be formed in a flat plate shape and coupled to the lower corners of the press body on the upper side of the upper plate 210 .

The case 220 may be installed to be spaced apart from the lower side of the upper plate 210 and form an internal space.

The upper plate support bar 230 is coupled to the support plate 360 of the elastic body 300 in the inner space of the case 220 , the upper part is exposed to the upper side of the case 220 , and the upper plate 210 uses an elastic force. ) can be supported.

The elastic body 300 includes a support part 310 , an absorption part 320 , a connecting metal plate 330 , an extended metal plate 340 , a hinge part 350 , and a support plate 360 .

The support part 310 includes a first metal plate 311 , a second metal plate 312 , a third metal plate 313 , and a fourth metal plate 314 formed of a “b”-shaped metal plate.

At this time, the first metal plate 311 , the second metal plate 312 , the third metal plate 313 , and the fourth metal plate 314 are spaced apart from each other so that their rear ends face each other to form an outer shape of a “” shape as a whole. And, by installing the absorbing part 320 in each space that is spaced apart, it is possible to absorb the vibration transmitted to each metal plate.

The absorbing part 320 is installed between each metal plate of the support part 310 and another metal plate, respectively, to absorb vibration.

In one embodiment, the absorbing part 320 may be formed of an elastic material such as a spring or rubber capable of absorbing shock, however, if it is a material that absorbs shock, it can be applied regardless of its name. It will be possible.

The connection metal plate 330 is between the upper portion of the first metal plate 311 and the upper portion of the second metal plate 312 , between the front end of the second metal plate 312 and the front end of the third metal plate 313 , and the third metal plate 313 . ) between the lower portion and the lower portion of the fourth metal plate 314 and between the front end of the fourth metal plate 314 and the front end of the first metal plate 311 are installed to be rotatable by two, respectively, the first metal plate 311, the second The second metal plate 312 , the third metal plate 313 , and the fourth metal plate 314 are connected and installed in a “” shape.

That is, the connecting metal plate 330 can not only interconnect the upper, lower, or front ends of each metal plate to form an overall appearance, but also rotate each connecting portion to respond to external vibration or impact of each metal plate. By adjusting the connection angle, it is possible to more efficiently absorb vibration or shock.

That is, when the first metal plate 311 , the second metal plate 312 , the third metal plate 313 , and the fourth metal plate 314 are fixed to each other by the connection metal plate 330 , some degree of external vibration or impact However, when a critical vibration or a critical shock is applied, the connection metal plate 330 connected to each metal plate is damaged, and the original function will not be able to be performed.

Accordingly, the connecting metal plate 330 according to the present invention connects the first metal plate 311 , the second metal plate 312 , the third metal plate 313 and the fourth metal plate 314 to be movable to some extent. , it is possible to maintain the fastening more efficiently in the case of vibration or shock than in the above case.

The extended metal plate 340 includes an upper (ie, an upper wing) and a front end (ie, a front wing) of the first metal plate 311 , an upper and a front end of the second metal plate 312 , and a front end of the third metal plate 313 . The lower portion and the fourth metal plate 314 are formed to extend two by two to the hinge part 350 for each metal plate in the upper or lower direction from the lower part and the front end.

In one embodiment, the extended metal plate 340 can be rotated by connecting the upper part or the lower part to the pivot shaft formed on one side of the hinge part 350 .

In one embodiment, the extended metal plate 340 is a second upper fastening groove 3113 or a second upper fastening groove 3113 or a second upper fastening groove 3113 to be slidably movable in the vertical direction in the second upper fastening groove 3113 or the second front end fastening groove 3115 . A sliding groove 341 in the vertical direction may be formed in the lower portion connected to the front end fastening groove 3115 .

The hinge part 350 is connected and installed so that the upper or lower portions of the two extended metal plates 340 extending from each metal plate face each other and rotatably, and are installed on each inner surface of the supporting plate 360 facing each other (eg For example, using fastening means such as screw bolts, welding or rivets).

The support plate 360, the upper side or the lower side of the hinge part 350 is installed, supports the ceiling and the floor of the case inside the case 220, is supported by the hinge part 350 in the vertical direction Spaces are formed to be spaced apart so that each component of the elastic body 300 is installed.

When the height between the ceiling and the floor of the case 220 is contracted, the elastic body 300 having the configuration as described above prevents the ceiling from descending in the downward direction, or by preventing the floor from ascending and descending in the upward direction. , to absorb the shock.

The first metal plate 311 includes a metal plate body 3111, two first upper fastening grooves 3112, a second upper fastening groove 3113, two first front end fastening grooves 3114 and a second front end fastening groove. (3115).

The metal plate body 3111 is formed of a “b”-shaped metal plate, two first upper fastening grooves 3112 and a second upper fastening groove 3113 are formed on the upper wing, and two first upper fastening grooves 3113 are formed on the front wing. A front end fastening groove 3114 and a second front end fastening groove 3115 are formed.

The first upper fastening groove 3112 is formed on the upper wing of the metal plate body 3111 formed in the upward direction to connect and install the front end of the connection metal plate 330 rotatably.

The second upper fastening groove 3113 is formed between the first upper fastening grooves 3112 to connect and install the lower portion of the extended metal plate 340 to be rotatable.

The first front end fastening groove 3114 is formed on the front wing of the metal plate body 3111 formed in the front end direction to connect and install the upper portion of the connecting metal plate 330 to be rotatable.

The second front-end fastening groove 3115 is formed between the first front-end fastening grooves 3114 to connect and install the lower portion of the extended metal plate 340 rotatably.

In one embodiment, the extended metal plate 340 is a second upper fastening groove 3113 or a second upper fastening groove 3113 or a second upper fastening groove 3113 to be slidably movable in the vertical direction in the second upper fastening groove 3113 or the second front end fastening groove 3115 . A sliding groove 341 in the vertical direction may be formed in the lower portion connected to the front end fastening groove 3115 .

In addition, the connecting metal plate 330 may also form a sliding groove having the same structure as the sliding groove 341 of the above-described extended metal plate 340 .

The first metal plate 311 having the above-described configuration can be equally applied to the second metal plate 312 , the third metal plate 313 , or the fourth metal plate 314 , which differ only in the installation position thereof. Descriptions of the second metal plate 312 , the third metal plate 313 , or the fourth metal plate 314 will be omitted.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications are possible by those having the knowledge of, of course, these modifications should not be individually understood from the technical spirit or perspective of the present invention.

10. Press system that can support the inside of the workpiece (S)
200. Impact canceling part
300. Elastomer

Claims (3)

a workbench having a fitting groove formed on an upper side thereof in the longitudinal direction; and
It includes a; is disposed on the upper side of the work table and is pressed in the vertical direction while looking at the work table.
It is characterized in that a concave groove corresponding to the longitudinal direction of the fitting groove is formed on the bottom surface of the pressing part facing the work table,
a lower mold whose upper surface is bent in a 'V' shape and is formed in a shape corresponding to the fitting groove so that a predetermined depth is inserted into the fitting groove of the workbench to mount a workpiece;
an upper mold fitted into the concave groove and arranged to be slidable left and right to press the workpiece in the direction of the lower mold according to the vertical movement of the pressing part;
a rail formed in the longitudinal direction at the rear side of the upper mold and the lower mold;
an inner support that is formed in a “__” shape, is seated on the rail, slides left and right, and supports a workpiece located between the lower mold and the upper mold from the inside;
a sensor disposed on the bottom surface of one side of the concave groove facing the work table to sense the bending angle of the workpiece when the upper mold is moved; and
A control unit for adjusting the pressing force of the pressing part by calculating the physical properties of the workpiece using the bending angle of the workpiece detected by the sensor;
The control unit is
The bending angle of the workpiece pressed by the upper mold and the bending angle of the workpiece in a state where the upper mold is spaced apart from the workpiece are transmitted from the sensor to calculate the physical properties of the workpiece as the difference between the bending angles arithmetic unit; and
and a memory unit for storing information on the pressing force applied to the workpiece, and creating and storing a lookup table for each shape or material of the workpiece;
The calculation unit and the memory unit,
The bending angle of the workpiece pressed by the upper mold and the bending angle of the workpiece in a state where the upper mold is spaced apart from the workpiece are received from the sensor, and the physical properties of the workpiece are calculated as the difference between the bending angles. It characterized in that to control the pressing force of the pressing part,
It further includes; a shock offsetting unit having an elastic body therein four installed at each corner of the bottom of the body constituting the lower part of the workbench to absorb vibrations or shocks from the floor and vibrations or shocks from the pressurizing unit;
The impact offset unit,
an upper plate formed in the form of a flat plate to which the lower part of the body is coupled to the upper side;
a case spaced apart from the lower side of the upper plate and forming an internal space; and
An upper plate support bar coupled to the support plate of the elastic body in the inner space of the case, the upper part of which is exposed to the upper side of the case to support the upper plate by using an elastic force;
The elastic body,
It includes a first metal plate, a second metal plate, a third metal plate and a fourth metal plate formed of a 'b'-shaped metal plate, the rear end of each of the first metal plate, the second metal plate, the third metal plate, and the fourth metal plate Supporting parts spaced apart to face each other to form a '+' shape as a whole;
an absorbing part installed between each metal plate of the supporting part and another metal plate to absorb vibration or shock;
Between the upper part of the first metal plate and the upper part of the second metal plate, between the front end of the second metal plate and the front end of the third metal plate, between the lower part of the third metal plate and the lower part of the fourth metal plate, and the front end of the fourth metal plate and the first metal plate a connecting metal plate installed so as to be able to rotate two by two between the front ends of each of the metal plates to connect and install each metal plate in a '+'shape;
The upper and the front end of the first metal plate, the upper and the front end of the second metal plate, the front end and lower part of the third metal plate, and the lower and front end of the fourth metal plate in the upper or lower direction from the upper or lower direction for each metal plate is formed to extend two by a rotating part extended metal plate;
Hinges installed on respective inner surfaces of the supporting plates facing each other, the upper or lower portions of the extended metal plates extending from the respective metal plates are connected to each other and are rotatably connected to each other; and
and a support plate on which the upper or lower surface of the rotating part is installed, and supporting the upper plate support bar and the bottom inside the case; and
The first metal plate,
A metal plate formed of a 'B'-shaped metal plate, in which two first upper fastening grooves and a second upper fastening groove are formed in the upper wing, and two first front fastening grooves and second front fastening grooves are formed in the front wing. main body;
a first upper fastening groove formed on an upper wing of the metal plate body formed in an upward direction and connected and installed so as to rotatably rotate the front end of the connection metal plate; and
A second upper fastening groove formed between the first upper fastening grooves and connected and installed so as to be able to rotate the lower part of the extended metal plate; including, a press system capable of supporting the inside of the workpiece.

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