KR20140126968A - Impact forming apparatus and impact forming method - Google Patents

Impact forming apparatus and impact forming method Download PDF

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Publication number
KR20140126968A
KR20140126968A KR1020130045333A KR20130045333A KR20140126968A KR 20140126968 A KR20140126968 A KR 20140126968A KR 1020130045333 A KR1020130045333 A KR 1020130045333A KR 20130045333 A KR20130045333 A KR 20130045333A KR 20140126968 A KR20140126968 A KR 20140126968A
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KR
South Korea
Prior art keywords
die
current
punch
mold
impact molding
Prior art date
Application number
KR1020130045333A
Other languages
Korean (ko)
Inventor
남기주
이준범
Original Assignee
삼성전자주식회사
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 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR1020130045333A priority Critical patent/KR20140126968A/en
Publication of KR20140126968A publication Critical patent/KR20140126968A/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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • 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
    • B21D26/06—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 by shock waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/32—Discharging presses

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

Abstract

Disclosed are an impact molding apparatus, which has a structure improved to enhance fluidity characteristics of a metal material and to reduce the weight of molding, and an impact molding method. The impact molding apparatus includes: a die on which a material is placed; a punch which corresponds to the die and compresses the material; and an electric current supplying device which is connected to the punch and supplies electric currents. According to the impact molding method, the material is placed on the die; electric currents are applied on the material to change properties of the material; and the punch presses the material so as to mold the material.

Description

[0001] IMPACT FORMING APPARATUS AND IMPACT FORMING METHOD [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an impact molding apparatus and an impact molding method, and more particularly, to an impact molding apparatus having an improved structure for improving metal moldability and a method thereof.

In general, metal materials have inherent molding limitations and therefore have limitations in their deformation. In order to manufacture a component having a complicated shape, a simple component must be manufactured and then subjected to assembly or welding. In this case, manufacturing time and cost of existing parts are increased. Therefore, there is a need to develop process methods that can reduce manufacturing time and manufacturing costs, thereby improving process efficiency.

Generally, a method of manufacturing a metal case without a joint and having a bottom surface is as follows.

The first method is to make a primary molding through a DEEP DRAWING process using a sheet material, and then to make a final molding by a blanking process, an embossing process, a trimming process and other additional processes. When such a process is used, there is a problem in that the number of molding processes increases, so that a manufacturing cost and a manufacturing period are prolonged.

The second method is to make a pipe or a rectangular tube with open top and bottom, cover the bracket, and then weld it to form the molding. In this method, there is a problem that a welding process is added, which is costly and difficult to use for a product requiring airtightness.

The third method is to produce the final molded product through impact molding, drawing process, trimming process, etc. after forming the primary molding by applying the material to the die and impacting with the punch. In this method, there is a problem that the molded case has a large thickness variation, and there is a manufacturable case shape and thickness limitation.

According to an aspect of the present invention, there is provided an impact molding apparatus and an impact molding method having an improved structure to improve a flow characteristic of a material and reduce a molding load.

The impact molding apparatus according to the present invention may include a die on which a work is placed, a die corresponding to the die, a punch for compressing the die, and a current application device connected to the die and the punch to supply current.

Further, the material is characterized by being a non-ferrous metal.

In addition, the impact molding apparatus according to the present invention includes a first metal mold to which the punch is connected and a second metal mold to support the die, and an insulator made of a material that does not allow current to flow is provided in a part of the upper mold and the lower mold .

And one of the punches connected to the upper mold and the die connected to the lower mold is a positive electrode, and the other is a negative electrode.

Meanwhile, in the impact molding method according to the present invention, a material is placed on a die, a current is applied to the material to change the characteristics of the material, and the material is molded while the punch presses the material .

Also. The current is applied by a current application device, and current flows from the punch and the die to the device that carries the anode to the anode, so that the texture of the material can be deformed.

In addition, the current may flow through the current application device directly connected to the workpiece, so that the texture of the workpiece may be deformed.

A current application device is added to the impact molding device, and a current flows through the metal material, thereby reducing the molding load of the metal material.

The impact shaping method using the impact molding apparatus having the current applying device can deform the structure of the metal material to improve the formability and the thinness of the product.

1 is a view showing an impact molding apparatus according to an embodiment of the present invention;
2 is a view showing a process of molding a material by an impact molding method according to an embodiment of the present invention

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

1 is a view showing an impact molding apparatus according to an embodiment of the present invention.

IMPACT molding is a type of compression processing (forging process) during press working, in which a molding material is put into a mold and pressure is applied to obtain a desired molded article.

As shown in Fig. 1, the impact molding apparatus 100 includes a first mold 1 and a corresponding second mold 2. As shown in Fig. A die 3 is provided in the second die 2 and a punch 4 for forming the blank 5 is formed in the first die 1 by being engaged with the die 3 at a position corresponding to the die 3 do.

An insulator 7 is provided on the die 3 so that the material 5 to be molded is placed and portions of the first and second molds are not allowed to conduct current.

Further, as a device for applying a current to the work 5, a current applying device 6 is provided.

The impact molding apparatus 100 can use a metal having good electrical conductivity as a material 5 to be molded.

Examples of the metal used as the material (5) include aluminum (Al), magnesium (Mg), copper (Cu) and the like.

However, in the case of iron (Fe), the electric conductivity is relatively low, and when a current is applied to iron (Fe), a large resistance is applied while electrons move and a heat phenomenon occurs. Therefore, as a kind of the material 5, iron is unsuitable.

The metal used as the material (5) is not limited to the above example except for iron (Fe).

Further, the impact molding apparatus 100 can form not only a plate material but also a BULK-type material. Therefore, as a preparation step for impact molding, it is possible to omit a separate step of processing the material, thereby shortening the molding step time.

The insulator 7 is an object that interrupts or blocks current or heat flow. As an example of the insulator 7, rubber, vinyl, or the like is used, and the kind of the insulator 7 is not limited thereto.

The current applying device 6 is a device for generating current, and the current applying device 6 is provided with a plurality of terminals 10a and 10b. Electric current is applied to the work 5 placed on the die 3 by the electric wires 11a and 11b connected to the respective terminals 10a and 10b.

The current applying device 6 may include a display unit 50 to an operation unit 60. [

The current applying device 6 can be connected to the second mold 1 including the punch 4 and the second mold including the die 3 by the electric wires 11a and 11b.

The electric current applying device 6 can also be connected to the material 5 placed on the die 1 and the first mold 1 including the punch 4 by the electric wires 11a and 11b.

Since the current flows from the positive electrode (+) to the negative electrode (-), the portion to which the current applying device 6 is connected forms different electrodes. Concretely, if the first mold 1 including the punch 4 forms the positive electrode (+), the material 5 placed on the second mold 2 or the die 3 including the die 3, Form a negative electrode (-). Conversely, if the material 5 placed on the second mold 2 or the die 3 including the die 3 forms the positive electrode (+), the first mold 1 including the punch 4 Thereby forming a negative electrode (-).

The impact molding apparatus 100 further includes a driving unit (not shown) provided in the first mold so that the punch 4 can apply pressure to the workpiece 5 placed on the die 3 of the second mold 2 can do.

2 is a view showing a process of forming a material by an impact molding method according to an embodiment of the present invention.

As shown in FIG. 2, the impact molding process through the impact molding apparatus 100 will be described below.

First, the bulk material 5 to be formed is placed on the die 3. Perform separate lubrication. The reason for performing the lubrication operation in the impact molding process is to prevent wear of the molding apparatus, to improve machining accuracy of the molded article and to prevent breakage.

Thereafter, a current is applied to the first mold 1 and the second mold 2 through the material 5 through the current applying device 6 while the first mold 1 of the impact molding apparatus 100 is lowered do.

If the first mold 1 including the punch 4 is continuously lowered while the current is applied to the first mold 1 and the second mold 2 through the material 5, Pressure is applied to the material (5).

At this time, the pressure is continuously applied until a molded article having a desired depth (H) is obtained.

When the punch 4 is brought into contact with the workpiece 5, the current applied by the current applying device 6 flows from the positive electrode (+) to the negative electrode (-), thereby changing the characteristics of the workpiece (5).

Specifically, the material 5 used in the impact molding apparatus 100 according to the present invention is made of a metal. Generally, when an electric current is applied to a metal (material), electrons move through the metal inner grid. Flows into the grid obstacle. The energy transferred to the lattice obstacle expands to the periphery to weaken the metal bond, thereby increasing the toughness of the metal, thereby improving the moldability of the metal (material).

When the molding is completed, the first mold including the punch 4 rises to the first position, and the application of the current stops. This completes one cycle.

When the impact molding method according to the present invention is adopted, an additional step such as a drawing process or a trimming process may be omitted.

The impact molding apparatus according to the present invention can be used for manufacturing a secondary battery case that can be used in a mobile communication terminal or an electric vehicle. In addition, it can be used to produce a can that can store contents therein.

The impact molding apparatus according to the present invention is not limited to the above example, and can be used to manufacture a thin case having no joint and having a bottom surface.

The foregoing has shown and described specific embodiments. However, it should be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the technical idea of the present invention described in the following claims .

1: first mold 2: second mold
3: die 4: punch
5: Material 6: Current application device
7: insulator 10a, 10b: terminal
11a, 11b: electric wire 50:
60: operating part 100: impact molding device

Claims (7)

A die on which the material is placed;
A punch for corresponding to the die, the punch for compressing the material; And
And a current applying device connected to the die and the punch to supply a current. The method according to claim 1,
Wherein the material is a non-ferrous metal. The method according to claim 1,
A first mold to which the punch is connected;
And a second mold supporting the die,
And an insulator made of a material that does not allow current to flow is provided in a part of the upper mold and the lower mold. The method according to claim 1,
And one of the punches connected to the upper mold and the die connected to the lower mold is a positive electrode, and the other is a negative electrode. Wherein a material is placed on a die, a characteristic of the material is changed by applying an electric current to the material, and the material is molded while the punch presses the material. 6. The method of claim 5,
Wherein the current is applied by a current application device and a current flows from the punch and the die to the device which winds the anode to the anode and deforms the texture of the material. 6. The method of claim 5,
Wherein a current flows through a current application device directly connected to the material to deform the texture of the material.
KR1020130045333A 2013-04-24 2013-04-24 Impact forming apparatus and impact forming method KR20140126968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130045333A KR20140126968A (en) 2013-04-24 2013-04-24 Impact forming apparatus and impact forming method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130045333A KR20140126968A (en) 2013-04-24 2013-04-24 Impact forming apparatus and impact forming method

Publications (1)

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KR20140126968A true KR20140126968A (en) 2014-11-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021194924A1 (en) * 2020-03-23 2021-09-30 Novelis Inc. Devices and methods configured to manipulate friction between a working piece and a deep drawing tool in a deep drawing process
WO2022092642A1 (en) * 2020-10-28 2022-05-05 주식회사 엘지에너지솔루션 Battery case molding apparatus using shock wave, and battery case molding method using same
KR20220149217A (en) * 2021-04-30 2022-11-08 울산대학교 산학협력단 Electric voltage welding and mold system for forging process, and electric voltage welding method using the mold system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021194924A1 (en) * 2020-03-23 2021-09-30 Novelis Inc. Devices and methods configured to manipulate friction between a working piece and a deep drawing tool in a deep drawing process
WO2022092642A1 (en) * 2020-10-28 2022-05-05 주식회사 엘지에너지솔루션 Battery case molding apparatus using shock wave, and battery case molding method using same
KR20220149217A (en) * 2021-04-30 2022-11-08 울산대학교 산학협력단 Electric voltage welding and mold system for forging process, and electric voltage welding method using the mold system

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