KR101786250B1 - Apparatus and Method for forming - Google Patents

Apparatus and Method for forming Download PDF

Info

Publication number
KR101786250B1
KR101786250B1 KR1020150183271A KR20150183271A KR101786250B1 KR 101786250 B1 KR101786250 B1 KR 101786250B1 KR 1020150183271 A KR1020150183271 A KR 1020150183271A KR 20150183271 A KR20150183271 A KR 20150183271A KR 101786250 B1 KR101786250 B1 KR 101786250B1
Authority
KR
South Korea
Prior art keywords
compression space
magnetic
support plate
workpiece
work
Prior art date
Application number
KR1020150183271A
Other languages
Korean (ko)
Other versions
KR20170074321A (en
Inventor
서영호
배기현
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020150183271A priority Critical patent/KR101786250B1/en
Publication of KR20170074321A publication Critical patent/KR20170074321A/en
Application granted granted Critical
Publication of KR101786250B1 publication Critical patent/KR101786250B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/18—Advancing work in relation to the stroke of the die or tool by means in pneumatic or magnetic engagement with the work

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The present invention provides a material forming apparatus as described below.
The material forming apparatus according to the present invention comprises: a support means for supporting the workpiece in contact with a non -forming portion of the workpiece, which is a magnetic material; and a connection portion connected to the support means, A fluid supply means for supplying a fluid for pressurizing the material to a compression space to be placed; And magnetic force generating means provided movably in the supporting means and provided as a magnetic body for deforming the workpiece, wherein the supporting means does not contact the forming portion of the workpiece in the compression space.

Description

[0001] Apparatus and Method for forming [0002]

The present invention relates to a material forming apparatus and method.

Generally, a molding apparatus such as a mold is used to mold a material into a desired shape. More specifically, as shown in FIG. 1, an upper mold 10 is disposed at an upper portion of the work 1 to press the work 1, and a lower mold 10 disposed at a lower portion of the work 1, A lower mold 20 is disposed so as to face each other.

A plurality of blank holders 30 are provided to hold and press the edge of the work 1. [

In the molding process using the mold having such a configuration, as shown in FIG. 2, friction occurs due to contact between the work 1 and the metal mold. That is, when the material 1 disposed between the upper mold 10 and the lower mold 20 is pressed against the upper mold 10 and the lower mold 20, the material 1 and the upper mold 10, The surface of the work 1 may be defective due to frictional force generated between the lower mold 10 and the lower mold 20, resulting in a problem of moldability deterioration.

In order to solve this problem, it is possible to make a point contact method such that the friction between the material and the mold is minimized. However, in order to make the point contact between the material and the mold, the structure of the mold becomes complicated, There is a problem that it is necessary.

This increases the cost of manufacturing the mold, complicates the molding process, and increases the time required for molding, which is not suitable for mass production.

An object of the present invention is to prevent defects occurring in forming a material, specifically, a magnetic material, and to improve the moldability of the material.

Specifically, the object is to eliminate the frictional force generated at the time of material forming.

It is also an object of the present invention to provide a material forming apparatus capable of improving the formability of a material by a simple structure and to provide a material forming method capable of improving the moldability of the material by a minimized process.

The present invention provides a material forming apparatus as described below.

The material forming apparatus according to the present invention comprises: a support means for supporting the workpiece in contact with a non -forming portion of the workpiece, which is a magnetic material; and a support member connected to the support means, A fluid supply means for supplying a fluid for pressurizing the material to a compression space to be placed; And magnetic force generating means provided movably in the supporting means and provided as a magnetic body for deforming the workpiece, wherein the supporting means does not contact the forming portion of the workpiece in the compression space.

Preferably, the compression space comprises: a first compression space formed by one surface of the material and the support means; And a second compression space formed by the other surface of the material and the support means, the fluid passage being provided in the fluid supply means and the first compression space, Closing means for opening and closing the fluid passage of the fluid respectively installed in the fluid passage provided in the space.

More preferably, the opening and closing means opens and closes the fluid passage of the fluid provided in the first compression space and the second compression space so that different pressures are applied to the first compression space and the second compression space You can.

More preferably, the magnetic force generating means is arranged so as to be opposed to one surface and the other surface of the work, and the work is deformed by a magnetic force, but can be in non-contact with the work.

More preferably, the supporting means includes: a first support plate disposed to face one surface of the workpiece; a second support plate arranged to face the other surface of the workpiece; And a plurality of support blocks connected to the first support plate and the second support plate, respectively, and arranged to be in contact with the work and support the work.

More preferably, the magnetic force generating means comprises: a first magnetic portion provided on the first supporting plate and deforming the work in the first compression space; And a second magnetic part installed on the second supporting plate and deforming the material in the second compression space.

More preferably, the fluid supply means includes: a compressor for compressing air; A first moving pipe connecting the compressor and the first compression space to form a fluid passage; And a second moving pipe connecting the compressor and the second compression space to form a moving path of the fluid.

More preferably, the first support plate and the second support plate include a linear guide corresponding to the material; And a moving block moving along the linear guide.

On the other hand, the present invention as another aspect provides a method of molding a material using the material forming apparatus described above, and provides the following material molding method.

According to a preferred embodiment of the present invention, there is provided a method of forming a workpiece, the method comprising: a fixing step of fixing a material of a magnetic material; a pressing step of applying pressure to the workpiece by a fluid; And a shaping step of shaping the workpiece through a magnetic part disposed at a position spaced apart from the workpiece while the workpiece is in a pressurized state.

Preferably, the pressing step may be performed to apply different pressures to a space corresponding to one surface and the other surface of the work.

More preferably, the forming step may be performed during the pressing step.

More preferably, the forming step may include a magnetic force adjusting step of adjusting a magnetic force by adjusting a distance that the magnetic portion is spaced apart from the workpiece.

According to the present invention, it is possible to improve the moldability and productivity of a material, specifically, a material having magnetism.

In addition, it is possible to eliminate the frictional force acting on the material, thereby preventing defects occurring after the material is formed or after the completion of the molding.

In addition, the moldability of the material can be improved by a simple structure, and the manufacturing cost can be reduced.

1 is a conceptual diagram of a conventional material forming apparatus.
2 is a conceptual diagram of a force acting on a material during molding by a conventional material forming apparatus.
3 is a conceptual diagram of a material forming apparatus according to a preferred embodiment of the present invention.
4 is a conceptual diagram of a material forming apparatus according to another embodiment of the present invention.
5 is a conceptual diagram illustrating the operation of a material forming apparatus according to an embodiment of the present invention.
6 is a flowchart of a material forming method according to a preferred embodiment of the present invention.

In order to facilitate an understanding of the description of the embodiments of the present invention, elements denoted by the same reference numerals in the accompanying drawings are the same element, and among the elements having the same function in each embodiment, Respectively.

Further, in order to clarify the gist of the present invention, a description of elements and techniques well known in the prior art will be omitted, and the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood, however, that the spirit and scope of the present invention are not limited to the embodiments shown, but may be suggested by those skilled in the art in other forms, additions, or alternatives, .

3 is a conceptual diagram of a material forming apparatus according to a preferred embodiment of the present invention. The material forming apparatus according to the present invention provides a material forming apparatus for applying a deformation to a material reacting with magnetism to form the material, but to deform the material without contacting the material.

An example of a material that reacts with magnetism is a material having a property that tends to stick to a magnet or a magnetic substance having magnetism.

The material forming apparatus according to the preferred embodiment of the present invention for contacting and deforming the material in response to magnetic force as described above to contact the material 1 and supporting the material 1 A fluid supply means (120) connected to the support means (110) for supplying a fluid to pressurize the work (1); a fluid supply means An opening and closing means 130 for opening and closing the fluid passage of the fluid and a magnetic force generating means 140 for moving the fluid in the supporting means 110 and being formed of a magnetic material and deforming the material.

The fluid supply means 120 pressurizes the material 1 with the pressure of the fluid and more specifically pressurizes the material 1 in the thickness direction of the material 1 so that the compressive residual stress As shown in FIG.

When the compressive residual stress is applied in the thickness direction of the blank 1 in this way, the springback phenomenon appearing in the blank after the blank is completed, that is, the elastic recovery that the blank is going to return to the shape before the blank is reduced. Therefore, it is possible to create an effect of improving the shape mobility of the work.

The fluid supply means 120 includes a compressor 121 for compressing air and a first moving pipe 122 and a second moving pipe 123 connected to the compressor and installed to pass through the material 1, . Here, the case of using the air pressure is described as an embodiment of the present invention, but the kind of the fluid is not limited to the present invention but may be appropriately selected and changed by those skilled in the art.

The first moving pipe 122 may be installed to pass through one side of the work 1 in order to supply air compressed by the compressor 121 to the work 1. The second moving pipe 123 is connected to the work 1 As shown in Fig. In an embodiment of the present invention, it may be installed in a space defined by the material 1 and the support means 110, which will be described later.

As shown in FIGS. 3 and 4, the supporting means 110 for supporting the work 1 in contact with the work 1 includes a first support plate 111 for supporting the work 1 facing one surface of the work, 2 support plate 112. As shown in FIG. At this time, the first support plate 111 and the second support plate 112 do not directly contact the work 1, but contact the support block 113 which is in direct contact with the work 1, ) Indirectly.

That is, a plurality of support blocks 113 may be provided, and one surface of the support block 113 may be disposed as shown in FIGS. 3 and 4 so as to contact one surface and the other surface of the work 1, respectively. The other surfaces of the support block 113 are in contact with the first support plate 111 and the second support plate 112, respectively.

The first support plate 111 and the second support plate 112 can be separated from the work 1 by a certain distance by the support block 113 and can be separated from the first support plate 111 is referred to as a first separation distance 111d and a distance from the other surface of the work 1 to the second support plate 112 is referred to as a second separation distance 112d. At this time, the first spacing distance 111d and the second spacing distance 112d can be adjusted by the height of the receiving block 113. [

 A compression space may be formed within the first and second spacing distances 111d and 112d. That is, a first compression space 150 is formed between the material 1 and the first support plate 111, and a second compression space 150 is formed between the material 1 and the second support plate 112. 160 may be formed.

Accordingly, the first moving pipe 122 and the second moving pipe 123 may be connected to the first compression space 150 and the second compression space 160, respectively. The compressed air in the compressor 121 is supplied to the first compression space 150 and the second compression space 160, respectively, so that the material 1 can be pressed.

At this time, the first moving pipe 122 and the second moving pipe 123 are connected to the same compressor 121 to provide the same air pressure to the first compression space 150 and the second compression space 160, The first moving pipe 122 and the second moving pipe 123 may be provided with the opening and closing means 130 so that the first compression space 150 and the second compression space 160 may have different pressures As shown in FIG.

The opening and closing means 130 includes a first valve 131 installed in the first moving pipe 122 for opening and closing the first moving pipe and a second valve 131 installed in the second moving pipe 123 for opening and closing the second moving pipe. 2 < / RTI >

The material can be deformed and molded in the first compression space 150 and the second compression space 160 constructed as described above. Specifically, the material is installed in the first support plate 111, A first magnetic portion 141 for deforming the work 1 in the first compression space 150 and a second magnetic portion 141 installed in the second support plate 112 for deforming the work 1 in the second compression space 160, The material 1 can be deformed by the two magnetic portions 142.

At this time, the first magnetic portion 141 and the second magnetic portion 142 are provided as a magnetic substance so as to attract the material 1, and are provided as an electromagnet such as a permanent magnet or a solenoid .

The solenoid is the simplest type of electromagnet. When a current is passed through a coil wound in a cylindrical shape, a magnetic field is formed. When an iron core is further inserted into the coil, a stronger magnetic field is obtained.

Therefore, the degree of deformation of the work 1 can be adjusted by adjusting the magnitude of the magnetic force generated in the first and second magnetic portions 141 and 142.

That is, when the first magnetic portion 141 and the second magnetic portion 142 are provided as permanent magnets, the strength of the magnetic force can be controlled by adjusting the distance between the work 1 and the magnetic body, The magnetic force becomes weaker as the magnetic body is farther away from the magnetic body 1, and the magnetic force becomes stronger as the magnetic body approaches the work 1. When the first magnetic portion 141 and the second magnetic portion 142 are formed of electromagnets, the current can be controlled by controlling the current amount.

Therefore, when magnetic force is applied to the first magnetic portion 141 and the second magnetic portion 142, the work 1 is pulled toward the first magnetic portion and the second magnetic portion. Therefore, the material can be molded using such a characteristic.

The first magnetic portion 141 and the second magnetic portion 142 are moved by the first and second support plates 111 and 112 so that the material 1 can be easily formed Respectively.

The first support plate 111 and the second support plate 112 may be provided as a linear guide corresponding to the material 1 and as a moving block moving along the linear guide. However, this is according to a preferred embodiment of the present invention, which can be suitably modified by those skilled in the art.

If the first magnetic portion 141 and the second magnetic portion 142 are provided as permanent magnets, the first magnetic portion 141 and the second magnetic portion 142 may be formed so as to easily control the intensity of the magnetic force applied to the work 1, And the second magnetic portion 142 can be configured to be movable not only in the longitudinal direction and the width direction of the work 1 but also in the thickness direction of the work 1. [

In this case, as shown in FIG. 4, the linear guides may be provided in the longitudinal direction or the width direction of the work and the thickness direction of the work, respectively. That is, the first support plate 111 and the second support plate 112 include a first linear guide 181 arranged in the longitudinal direction or the width direction of the work 1 and a second linear guide 182 arranged in the thickness direction of the work 1 And a moving block 190 moving along the first linear guide and the second linear guide.

The first magnetic portion 141 and the second magnetic portion 142 are fixed to the moving block 190 so that the first and second magnetic portions 141 and 142 can move the moving block 190 And then move in the first and second support plates. The movement path of the linear guide and the moving block may be formed on the work 1 so that the magnetic force generated by the first magnetic portion 141 and the second magnetic portion 142 is completely transmitted to the work 1 In order to make it possible.

5, as the magnetic force generated by the first magnetic portion 141 and the second magnetic portion 142 attracts the material 1, The material 1 is pulled in the direction of the first magnetic portion 141 and the second magnetic portion 142, respectively, and is subjected to bending deformation. Accordingly, the first magnetic portion 141 and the second magnetic portion 142 can be appropriately moved, and the material 1 can be deformed and formed into an appropriate shape.

On the other hand, the present invention as another aspect provides a method for non-contact molding a magnetic material. 6, includes a fixing step S100 for fixing the workpiece, a pressing step S200 for applying pressure by the fluid to the workpiece, and a forming step S300 for disposing the magnetic body in contact with the workpiece .

Preferably, the forming step S300 may include a magnetic force adjusting step (S310) of moving the magnetic body to adjust a distance by which the magnetic body is separated from the work.

That is, when the magnetic body is provided as a permanent magnet, the magnetic force can be adjusted by adjusting the distance that the magnetic body is spaced apart from the workpiece in the thickness direction of the workpiece. If the magnetic body is provided with an electromagnet, The intensity can be adjusted. Therefore, a person skilled in the art can have a suitable type of magnetic body by such a technical idea.

When the material is molded by the magnetic material as described above, the molding device and the material do not come into contact with each other, and frictional force can be prevented from being generated as the molding device and the material are not in contact with each other. Therefore, it is possible to prevent quality defects caused by the frictional force acting between the molding apparatus and the material, and the shape fixability of the formed material is increased.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be apparent to those of ordinary skill in the art.

1: Material 10: Upper mold
20: Lower mold 30: Blank holder
110: support means 111: first support plate
112: second support plate 113: support block
120: fluid supply means 121: compressor
122: first moving tube 123: second moving tube
130: opening / closing means 131: first valve
132: second valve 140: magnetic force generating means
141: first magnetic portion 142: second magnetic portion
150: first compression space 160: second compression space
180: linear guide 190: moving block

Claims (12)

A supporting means for supporting the workpiece in contact with a non -forming portion of the workpiece being a magnetic material;
A fluid supply means connected to the support means and supplying fluid for pressurizing the material to a compression space formed between the material and the support means and in which the molding portion of the material is placed; And
And magnetic force generating means installed to move in the supporting means and provided as a magnetic body to deform the workpiece,
Wherein the support means comprises:
And is not in contact with the forming portion of the material in the compression space.
The method according to claim 1,
The compression space
A first compression space formed by one surface of the material and the support means; And a second compression space formed by the other surface of the material and the support means,
A fluid passage provided in the fluid supply means and the first compression space and a fluid passage provided in the fluid supply means and the second compression space, Way;
Further comprising:
3. The method of claim 2,
The opening /
Wherein the first compression space and the fluid passage of the second compression space are opened and closed differently so that different pressures are applied to the first compression space and the second compression space.
The method according to claim 2 or 3,
The magnetic force generating means includes:
Wherein the material is deformed by a magnetic force so as to be opposed to one surface and the other surface of the material but not in contact with the material.
5. The method of claim 4,
Wherein the support means comprises:
A first support plate disposed to face one surface of the workpiece;
A second support plate disposed to face the other surface of the workpiece; And
A plurality of support blocks connected to the first support plate and the second support plate, respectively, and arranged to be in contact with the work and support the work;
And the material forming apparatus.
6. The method of claim 5,
The magnetic force generating means includes:
A first magnetic part installed on the first support plate and deforming the material in the first compression space; And
A second magnetic portion provided on the second support plate for deforming the material in the second compression space;
And the material forming apparatus.
3. The method of claim 2,
Wherein the fluid supply means comprises:
A compressor for compressing air; And
A first moving pipe connecting the compressor and the first compression space to form a fluid passage; And
A second moving pipe connecting the compressor and the second compression space to form a fluid passage;
And the material forming apparatus.
6. The method of claim 5,
The first support plate and the second support plate may be formed of a plate-
A linear guide arranged corresponding to the material; And
A moving block moving along the linear guide;
Respectively. ≪ Desc / Clms Page number 17 >
A method for molding a material by the material forming apparatus of claim 1,
A fixing step of fixing the material of the magnetic material;
A pressurizing step of applying a fluid pressure to the material; And
A forming step of forming the material through a magnetic portion disposed at a position spaced apart from the work while the work is pressed;
.
10. The method of claim 9,
Wherein the pressing step comprises:
Wherein a different pressure is applied to a space corresponding to one surface and the other surface of the material.
11. The method according to claim 9 or 10,
The forming step comprises:
Wherein the pressing step is performed during the pressing step.
10. The method of claim 9,
The forming step comprises:
A magnetic force adjusting step of adjusting a magnetic force by adjusting a distance by which the magnetic portion is spaced from the workpiece;
Wherein the material forming method comprises the steps of:
KR1020150183271A 2015-12-21 2015-12-21 Apparatus and Method for forming KR101786250B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150183271A KR101786250B1 (en) 2015-12-21 2015-12-21 Apparatus and Method for forming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150183271A KR101786250B1 (en) 2015-12-21 2015-12-21 Apparatus and Method for forming

Publications (2)

Publication Number Publication Date
KR20170074321A KR20170074321A (en) 2017-06-30
KR101786250B1 true KR101786250B1 (en) 2017-10-18

Family

ID=59279883

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150183271A KR101786250B1 (en) 2015-12-21 2015-12-21 Apparatus and Method for forming

Country Status (1)

Country Link
KR (1) KR101786250B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108580715A (en) * 2018-04-26 2018-09-28 阜阳盛东智能制造技术研发有限公司 A kind of stamping mechanical arm workbench

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100391438B1 (en) * 2000-12-30 2003-07-12 현대자동차주식회사 Molding apparatus for hydro-forming
KR101419197B1 (en) * 2014-01-07 2014-07-14 손호영 Hydroforming apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100391438B1 (en) * 2000-12-30 2003-07-12 현대자동차주식회사 Molding apparatus for hydro-forming
KR101419197B1 (en) * 2014-01-07 2014-07-14 손호영 Hydroforming apparatus

Also Published As

Publication number Publication date
KR20170074321A (en) 2017-06-30

Similar Documents

Publication Publication Date Title
CN102764807B (en) Manufacturing method of press product and press forming apparatus
CA2586049C (en) Draw forming method and device
CN110153254B (en) Flanging processing device
US7891226B2 (en) Electromagnetic blank restrainer
KR102326753B1 (en) Molding system and molding method
US11426784B2 (en) Method and device for producing components having an adjusted bottom reagion
KR101665796B1 (en) Apparatus for press forming
KR101786250B1 (en) Apparatus and Method for forming
KR20120110552A (en) Drawing mould having a friction block
KR101748300B1 (en) Punching apparatus for hole expansion test
JP2013163209A (en) Hot press forming device and hot press forming method
JP2021058896A (en) Metal pipe molding device and metal pipe molding method
JP4556432B2 (en) Metal plate press forming method
KR20160150176A (en) Magnetic chuck using slide
JP2010247199A (en) Method and device for partial thickness increasing of press-made workpiece
JP2006247705A (en) Press-forming method for metal plate
KR20090013873A (en) Cushion pressure stabilization apparatus of press mold
JP2011056573A (en) Press forming apparatus and press forming method
US11850646B2 (en) Manufacturing apparatus and manufacturing method for hat-shaped section component with curved projection portion
CN110479831B (en) Stamping die with automatic feeding mechanism
US11253901B2 (en) Indirect electrohydraulic press forming tool, device and method
KR20200085425A (en) forming devices of torsion bar for cars
JP2004237320A (en) Return mechanism of cam slider
JP2006312184A (en) Press working device and press working method
CN108817215A (en) A kind of bending centering block molding machine

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant