KR20160077289A - Forming apparatus - Google Patents

Forming apparatus Download PDF

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Publication number
KR20160077289A
KR20160077289A KR1020140186044A KR20140186044A KR20160077289A KR 20160077289 A KR20160077289 A KR 20160077289A KR 1020140186044 A KR1020140186044 A KR 1020140186044A KR 20140186044 A KR20140186044 A KR 20140186044A KR 20160077289 A KR20160077289 A KR 20160077289A
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KR
South Korea
Prior art keywords
fluid
magnetic fluid
unit
electromagnetic
molding
Prior art date
Application number
KR1020140186044A
Other languages
Korean (ko)
Inventor
서강
이현영
최병섭
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.)
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Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020140186044A priority Critical patent/KR20160077289A/en
Publication of KR20160077289A publication Critical patent/KR20160077289A/en

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    • 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

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

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus capable of improving the electromagnetic force added to a molding material.
That is, a molding apparatus according to an embodiment of the present invention includes: a mold unit provided with a molding material; an electromagnetic unit provided on one surface of the molding material and adapted to apply an electromagnetic force to the molding material; And a forming fluid unit that is connected to the magnetic material and provides a magnetic fluid having a higher specific magnetic permeability than air, between the molding material and the electromagnetic unit.

Description

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus, and more particularly, to an invention in which a molding material is deformed by an electromagnetic force to be molded.

However, in recent years, as shown in FIG. 1A and FIG. 1B, the shape of the workpiece 2 'is deformed by electromagnetic force. However, the shape of the workpiece 2' Device.

The principle of molding the to-be-molded material 2 'using the electromagnetic force is that the electromagnetic unit 20' and the to-be-molded material 2 'are supplied with electric energy by supplying the electric energy to the electromagnetic unit 20' A deforming force acts on the to-be-molded material 2 'by an electromagnetic force generated by electrical interlocking between the to-be-molded material 2' and the mold unit 10 ' (2 ') are in close contact with each other.

As described above, since the molding using the electromagnetic force exerts high power beyond the anti-restoring force, not only the molding quality is excellent but also the productivity is excellent, and the range of its use is gradually increasing.

Accordingly, the existing electromagnetic force shaping apparatus is under study to improve the shape of the coil and the power supply (W) in order to increase the electromagnetic force.

However, improvement of the electromagnetic force is limited only by improvement of the coil and the power supply (W).

Therefore, research has been required to improve the electromagnetic force acting on the workpiece 2 'without improving the coil or the power supply W.

An object of the present invention is to provide a molding apparatus capable of improving the electromagnetic force added to the material to be molded.

A molding apparatus according to an embodiment of the present invention includes a mold unit provided with a molding material, an electromagnetic unit provided on one surface of the molding material and adapted to apply an electromagnetic force to the molding material, And a forming fluid unit that provides a magnetic fluid having a higher specific magnetic permeability than air, between the material to be molded and the electromagnetic unit.

The molding fluid unit of the molding apparatus according to an embodiment of the present invention may further include a housing member to which the electromagnetic unit is coupled and provided with a housing portion in which the magnetic fluid is provided, And a sealing member coupled to the housing member, as desired.

In addition, the sealing member of the molding apparatus according to an embodiment of the present invention may be formed of a stretchable material.

In addition, the sealing member of the molding apparatus according to an embodiment of the present invention is provided in the shape of a bag which is coupled to the inflow hole of the housing member into which the magnetic fluid flows, and only the portion connected to the inflow hole is opened .

The molding fluid unit of the molding apparatus according to an embodiment of the present invention is provided so as to connect the housing member and the fluid reservoir to supply the magnetic fluid between the housing member and the sealing member, And a control valve provided in the fluid inlet pipe and adjusting an amount of the magnetic fluid to be supplied.

Further, the magnetic fluid of the molding apparatus according to an embodiment of the present invention may be provided with water.

The molding apparatus of the present invention has the effect of remarkably improving the electromagnetic force acting on the molding material as compared with the case where the medium between the molding material and the electromagnetic unit is provided with air.

Thereby, it is possible to overcome the limit of the improvement of the electromagnetic force which can be improved by the design change of the coil or the power supply circuit of the electromagnetic unit.

Furthermore, by improving the electromagnetic force acting on the molding material with respect to the same power supply, it is possible to increase the efficiency of molding production such as energy efficiency improvement and moldability improvement.

1A and 1B show a molding apparatus using a conventional electromagnetic force.
2 is a sectional view showing a molding apparatus of the present invention.
Fig. 3 is a view showing a state in which the material to be molded is deformed in the molding apparatus of the present invention. Fig.
4 is a perspective view showing a sealing member in the molding apparatus of the present invention.
5 is a view showing the state of the sealing member at the time of molding the material to be molded in the molding apparatus of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. 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 inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

The molding apparatus (1) of the present invention relates to an invention for forming and deforming a material (2) to be molded by an electromagnetic force.

In other words, the molding apparatus 1 of the present invention can reduce the electromagnetic force acting on the workpiece 2 to a greater extent than the case where the medium between the workpiece 2 and the electromagnetic unit 20 is provided as air A. [ .

Thereby, it is possible to overcome the limit of the improvement of the electromagnetic force which can be improved by the design change of the coil or the power supply circuit of the electromagnetic unit, and further, by improving the electromagnetic force acting on the molding material 2 , It is possible to increase the efficiency of molding production such as improving energy efficiency and improving moldability.

2 is a cross-sectional view showing the molding apparatus 1 of the present invention, and Fig. 3 is a view showing a state in which the molding material 2 is deformed in the molding apparatus 1 of the present invention.

2 and 3, a molding apparatus 1 according to an embodiment of the present invention includes a mold unit 10 provided with a material 2 to be molded, And an electromagnetic unit (20) for applying an electromagnetic force to the molding material (2) and a magnetic fluid (3) connected to the electromagnetic unit (20) (30) provided between the electromagnetic unit (2) and the electromagnetic unit (20).

That is, in order to increase the electromagnetic force, in addition to providing the electromagnetic unit 20 for forming the workpiece 2 using the electromagnetic force, generally, the electromagnetic unit 20 and the workpiece 2 , A magnetic fluid (3) having a relative permeability higher than that of the air (A) is provided between the electromagnetic unit (20) and the molding material (2) in place of the air (A) will be.

In other words, the magnetic fluid 3 is provided between the electromagnetic unit 20 and the workpiece 2 so that the electromagnetic unit 20 has the same degree of freedom as the fluid before the molding, W, the electromagnetic force generated in the workpiece 2 due to the relative permeability higher than the air A is improved.

The mold unit 10 serves to guide the deformed shape to the shape of the product when the molding material 2 is deformed by the electromagnetic force. That is, the shape of the product to be formed on the inner surface is formed and provided, and the shape of the product can be formed by being closely contacted when the expansion or contraction of the molding material 2 is deformed.

To this end, the mold unit 10 is provided at a position opposite to the position at which the electromagnetic unit to be described later is provided based on the molding material 2.

The electromagnetic unit 20 serves to provide an electromagnetic force to the workpiece 2. To this end, the electromagnetic unit 20 may be provided adjacent to the workpiece 2.

The electromagnetic unit 20 may include a coil W and a power supply W including a circuit for generating an electromagnetic force.

That is, a pancake which can be applied to the inner and outer circular coil members or the plate-shaped molding material (2) which can be applied to the tube-shaped material (2) Coil member or the like may be provided, and the magnetic force concentrator may be used to concentrate the magnetic force depending on the shape of the product.

The power supply W may be provided with a pulse power source for generating pulse power and a circuit composed of an inductor, a resistor, a capacitor, etc. connected to an electromagnetic coil for generating an electromagnetic field to process the workpiece, .

The shaping fluid unit 30 serves to provide a magnetic fluid 3 between the workpiece 2 and the electromagnetic unit 20 in order to significantly increase the electromagnetic force acting on the workpiece 2 can do.

Particularly, the magnetic fluid 3 is generally provided as a material having a higher specific permeability than air (A) provided between the molding material 2 and the electromagnetic unit 20, And to improve the electromagnetic force acting thereon.

For example, when the magnetic permeability U r of the magnetic fluid 3 is about 100, the electromagnetic force is increased by about 10000 times as compared with the case where the air permeability A of the air A is 1 can do.

That is, the magnetic field generated by the self-equivalent circuit method is expressed by Equation (1).

[Equation 1]

B = U 0 x U r x N x I / L

Where U is the magnetic permeability (T), U 0 is the permeability at vacuum (4x pi / 10000000), U r is the specific permeability, and L is the average magnetic circuit length (m).

Then, the electromagnetic force acting on the workpiece 2 by the magnetic field is expressed by the following equation (2).

&Quot; (2) "

F = B 2 x S / (2 x U 0 )

Here, F is the electromagnetic force (N) received by the workpiece (2), and S is the cross-sectional area (m2) of the workpiece (2) receiving the electromagnetic force.

From the above two equations, the magnetic field produced by the difference of the specific magnetic permeability shows a difference of 100 times, and the difference of the force due to the magnetic field made by the difference of 100 times becomes 10,000 times.

Therefore, when the magnetic fluid (3) is used, energy of about 10,000 times greater can be transferred to the plate material when the same energy is used, so that it is possible to form the plate material for energy efficiency and high strength steel.

Here, the magnetic fluid 3 may be provided in two types, oil type and water type. Depending on the type, the magnetic fluid 3 may be varied depending on the stiffness of the plate and the difference between the viscosity and the specific permeability. Particularly, water which can be used frequently can be used as the magnetic fluid (3).

In other words, the magnetic fluid 3 of the molding apparatus 1 according to an embodiment of the present invention may be provided with water.

Since the magnetic fluid 3 receives the electromagnetic force, the magnetic fluid 3 may have a predetermined shape depending on the magnitude of the electromagnetic force. This acts as a processing force for forming the to-be-molded material 2, It is possible to further facilitate the molding of the mold 2.

3 (a) is a state in which electromagnetic force is not applied, and FIG. 3 (b) is a state in which an electromagnetic force is applied. Electromagnetic force acts on the material 2 to be molded, The molding material 2 may be processed while an electromagnetic force is applied to the magnetic fluid 3 to push the center portion of the material 2 to be molded.

To enhance this effect, the magnetic fluid 3, such as water, may be provided with a mixture of solid phase materials such as iron powder.

The molding fluid unit 30 may further include a housing member 31, a sealing member 32, a fluid inflow pipe 33, a control valve 34, and the like.

Here, the housing member 31 is a portion provided with the magnetic fluid 3 sealed by a sealing member 32 to be described later. That is, the housing member 31 can provide the magnetic fluid 3 to the bucket-shaped receiving portion 31a.

In addition, the housing member 31 may be provided with an inlet hole 31b connected to a fluid inlet pipe 33 to be described later. The inlet hole 31b may be closed through a stopper member to be changed or charged The magnetic fluid 3 can be opened and introduced or removed.

The sealing member 32 serves to prevent leakage of the magnetic fluid 3 provided as a fluid. A detailed description of such a sealing member 32 will be described later with reference to Figs. 4 and 5. Fig.

The fluid inlet pipe (33) and the control valve (34) serve to supply the magnetic fluid (3). That is, the molding fluid unit 30 of the molding apparatus 1 according to the embodiment of the present invention is configured to supply the magnetic fluid 3 between the housing member 31 and the sealing member 32, A fluid inflow pipe 33 provided to connect the housing member 31 and the fluid reservoir S and provided with a supply pump P in cooperation with the fluid inflow pipe 33, And an adjusting valve 34 for adjusting the amount of the fluid 3.

Particularly, the control valve 34 serves to prevent the magnetic fluid 3 from disengaging after the magnetic fluid 3 is supplied even when the stopper member or the like is not provided on the housing member 31 .

Fig. 4 is a perspective view showing a sealing member 32 in the molding apparatus 1 of the present invention. Fig. 5 is a sectional view of the sealing member 32 when the molding material 2 is molded in the molding apparatus 1 of the present invention. Fig.

4 and 5, the molding fluid unit 30 of the molding apparatus 1 according to the embodiment of the present invention is also characterized in that the electromagnetic unit 20 is coupled, And a sealing member 32 coupled to the housing member 31 such that the magnetic fluid 3 is hermetically provided in the receiving portion 31a. The housing member 31 is provided with a housing member 31, . ≪ / RTI >

Here, the sealing member 32 may prevent leakage of the magnetic fluid 3 provided as a fluid.

That is, since the magnetic fluid 3 has a large degree of freedom in deforming the shape, there is a problem such as leakage, and the sealing member 32 is provided to prevent such a problem.

Particularly, the sealing member 32 of the molding apparatus 1 according to the embodiment of the present invention may be formed of a stretchable material.

Here, it is preferable that the magnetic fluid 3 is sealed with a material such as a rubber material that is elastic, and furthermore, it is provided with a material that can withstand external impacts without being torn.

The sealing member 32 of the molding apparatus 1 according to an embodiment of the present invention is coupled to the inlet hole 31b of the housing member 31 into which the magnetic fluid 3 flows, And only the portion connected to the inlet hole 31b is opened.

This is for the magnetic fluid 3 itself to be able to exert such a deforming force on the molding of the molding material 2 when the shape is deformed by the electromagnetic force.

That is, when the magnetic fluid 3 is filled into the inlet hole 31b and the magnetic fluid 3 is filled in the sealing member 32 and the magnetic fluid 3 is deformed by the electromagnetic force, , The sealing member 32 is deformed corresponding to the deformed shape of the magnetic fluid 3 so as to pressurize the molding material 2 and form the molding shape of the molding material 2 .

5 (a) shows a sealing member 32 in the form of a bag in which a magnetic fluid 3 to which no electromagnetic force is applied is shown. FIG. 5 (b) shows a magnetic fluid 3 It is possible to refer to the fact that the magnetic fluid 3 is pushed to the center portion and the sealing member 32 is also stretched in the middle portion.

1: Molding device 2: Molded material
3: magnetic fluid 10: mold unit
20: Electromagnetic unit 30: Molding fluid unit
31: housing member 32: sealing member
33: fluid inlet pipe 34: regulating valve

Claims (6)

A mold unit provided with a molding material;
An electromagnetic unit which is provided on one surface of the molding material and applies an electromagnetic force to the molding material; And
A forming fluid unit connected to the electromagnetic unit, for providing a magnetic fluid having a higher specific permeability than air, between the material to be molded and the electromagnetic unit;
≪ / RTI > The method according to claim 1,
The forming fluid unit includes:
A housing member to which the electromagnetic unit is coupled, the housing member being provided with a receiving portion to which the magnetic fluid is supplied; And
A sealing member coupled to the housing member such that the magnetic fluid is hermetically provided in the receiving portion;
≪ / RTI > 3. The method of claim 2,
Wherein the sealing member is provided and formed of a stretchable material. The method of claim 3,
Wherein the sealing member is provided in the shape of a bag which is coupled to the inflow hole of the housing member into which the magnetic fluid flows and is formed so that only a portion connected to the inflow hole is opened. 3. The method of claim 2,
The forming fluid unit includes:
A fluid inlet pipe connected to the housing member and the fluid reservoir to supply the magnetic fluid between the housing member and the sealing member, the fluid inlet pipe being provided with a supply pump connected thereto; And
A regulating valve provided in the fluid inlet pipe for regulating an amount of the magnetic fluid to be supplied;
Further comprising: 6. The method according to any one of claims 1 to 5,
Wherein the magnetic fluid is provided with water.
KR1020140186044A 2014-12-22 2014-12-22 Forming apparatus KR20160077289A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
KR1020140186044A KR20160077289A (en) 2014-12-22 2014-12-22 Forming apparatus

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019098379A (en) * 2017-12-05 2019-06-24 三菱重工業株式会社 Forming device
CN111451354A (en) * 2020-03-27 2020-07-28 中南大学 Electromagnetic-fluid impact composite forming device for pipe fitting and forming method thereof
WO2024109321A1 (en) * 2022-11-25 2024-05-30 哈尔滨工业大学 Rigid die coated with magnetorheological elastomer layer and plate part forming method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019098379A (en) * 2017-12-05 2019-06-24 三菱重工業株式会社 Forming device
EP3677358A4 (en) * 2017-12-05 2020-11-18 Mitsubishi Heavy Industries, Ltd. Molding device
CN111451354A (en) * 2020-03-27 2020-07-28 中南大学 Electromagnetic-fluid impact composite forming device for pipe fitting and forming method thereof
CN111451354B (en) * 2020-03-27 2022-05-27 中南大学 Electromagnetic-fluid impact composite forming device for pipe fitting and forming method thereof
WO2024109321A1 (en) * 2022-11-25 2024-05-30 哈尔滨工业大学 Rigid die coated with magnetorheological elastomer layer and plate part forming method

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