KR20170075352A - Forming method of magnesium alloy sheet - Google Patents

Forming method of magnesium alloy sheet Download PDF

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Publication number
KR20170075352A
KR20170075352A KR1020150184902A KR20150184902A KR20170075352A KR 20170075352 A KR20170075352 A KR 20170075352A KR 1020150184902 A KR1020150184902 A KR 1020150184902A KR 20150184902 A KR20150184902 A KR 20150184902A KR 20170075352 A KR20170075352 A KR 20170075352A
Authority
KR
South Korea
Prior art keywords
magnesium
magnesium plate
plate material
forming method
electrode
Prior art date
Application number
KR1020150184902A
Other languages
Korean (ko)
Inventor
서종덕
임창용
임정식
Original Assignee
주식회사 신영
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 신영 filed Critical 주식회사 신영
Priority to KR1020150184902A priority Critical patent/KR20170075352A/en
Publication of KR20170075352A publication Critical patent/KR20170075352A/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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/03—Electrodes

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

Abstract

Disclosed is a magnesium sheet material forming method capable of improving the moldability of a magnesium sheet material at a low cost without deteriorating the mechanical properties of the magnesium sheet material.
A magnesium plate material forming method according to the present invention is a method of molding magnesium by press working, comprising the steps of: blanking a magnesium plate material; holding both ends of a blanked magnesium plate material by using an electrode; A step of increasing the temperature of the magnesium plate material, and a step of press-forming the magnesium plate material and molding the same.

Description

[0001] The present invention relates to a method of forming a magnesium sheet,

The present invention relates to a magnesium plate material forming method.

The light weight of the vehicle is an important topic in the automotive industry. This is because fuel economy depends on the weight of the vehicle. In particular, the demand for lightweight body parts is increasing due to the recent rise in oil prices and the strengthening of fuel economy and CO 2 regulations around the world. In the case of hybrid vehicles and fuel vehicles, it is expected that the weight of the hybrid vehicle and the fuel car will be increased by about 90 to 250 kg as compared with the conventional internal combustion engine vehicle. Therefore, weight saving of the vehicle is essential.

The most efficient way to lighten the vehicle is to use lighter materials than conventional materials. Therefore, application to lightweight alloys such as magnesium is increasing. In the advanced automobile industry, magnesium is being applied to luxury cars and it is expected to continue to be applied to magnesium body parts in the future. However, magnesium has a limited application due to low moldability and high process cost.

Considering the moldability of the magnesium plate, the hot-blow forming method is currently available for mass production. However, this method has a disadvantage in that it is not competitive in terms of productivity as well as cost. Warm forming has been studied as a method for improving the moldability by heating the material to a temperature region where plastic deformation can smoothly occur. However, the investment cost for forming the molding process system is high, There is a disadvantage in that the mechanical properties of the substrate are lowered.

Korean Patent Publication No. 10-2014-0102107 (2014. 08. 21.)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a magnesium plate material forming method capable of improving the moldability of a magnesium plate material without deteriorating the mechanical properties of the magnesium plate material, .

The magnesium plate material forming method according to the present invention is a method of molding magnesium by press working, comprising the steps of: blanking the magnesium plate material; holding both ends of the blanked magnesium plate material by using an electrode; To increase the temperature of the magnesium plate material, and molding the heated magnesium plate material by press working.

According to another aspect of the present invention, the temperature of the magnesium plate can be increased up to 250 캜.

According to another aspect of the present invention, the electrode may be a copper electrode.

According to the present invention, the moldability of the magnesium plate is improved and the springback is reduced.

1 is a flowchart of a magnesium plate material forming method according to an embodiment of the present invention.
FIG. 2 illustrates a method of forming a magnesium plate according to an embodiment of the present invention.

The foregoing and further aspects will become apparent through the following examples. In the present specification, corresponding elements in each figure are referred to by the same numerals. In addition, the shape and size of the components can be exaggerated. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

DETAILED DESCRIPTION OF THE INVENTION The present invention will now be described in detail with reference to the following examples.

First, in the present invention, the magnesium plate material forming method refers to a method of molding magnesium by press working. The press method itself is a general technique, so we will not go into details here.

FIG. 1 is a flow chart of a magnesium plate forming method according to an embodiment of the present invention, and FIG. 2 illustrates a magnesium plate forming method according to an embodiment of the present invention.

1 and 2, the magnesium plate material forming method includes a step (S10) of blanking a magnesium plate material, a step (S20) of holding both ends of a blanked magnesium plate material using an electrode, a step of forming a magnesium plate material (S30) of increasing the temperature of the magnesium plate by applying electricity to the magnesium plate (S30), and molding (S40) pressing the heated magnesium plate.

Step S10 of blanking the magnesium plate material is a step of blanking the magnesium plate material and cutting it into a desired shape. The product is blanked and press-molded with the cut portion 10 to produce a product. The remaining portion except the cut portion can be scrapped.

Next, both ends of the blanked magnesium plate 10 are held using the electrode 20 (S20). Here, the electrode 20 may be a copper electrode. Since the copper electrode has low electrical resistance, the energy dissipation in the energization process described below is reduced. The magnesium plate 10 can be held by the pair of upper and lower electrodes 20. An insulating material may be disposed above and below the pair of upper and lower electrodes 20 to prevent current from leaking during the energization process described below.

Next, electricity is applied to the magnesium plate material 10 blanked through the electrode 20 to raise the temperature of the magnesium plate material 10 (S30). When the temperature of the magnesium plate material 10 rises, the flow stress of the magnesium plate material decreases and the elongation rate increases. Therefore, moldability is improved. Here, the temperature of the magnesium plate can be increased up to 250 ° C. The electricity applied here may be DC or alternating current.

Next, the heated magnesium plate 10 is press-formed and molded (S40). The magnesium die plate 10 heated on the lower die is placed and the upper die 30 is lowered or the lower die 40 is raised so that the upper die 30 and the lower die 40 are combined to form the product . Of course, both the upper die 30 and the lower die 40 may be moved and joined together. Since the heated magnesium plate has good moldability, it can be easily molded.

According to the magnesium plate material forming method as described above, when magnesium is press molded, the magnesium plate material has good moldability, and the molding is good, the springback is reduced, the productivity is improved, and the quality of the product is improved.

In addition, there are no problems such as inefficiency of energy in a conventional method of heating and molding a plate material and a mold, surface defects due to sticking between the mold and the material, and wear of the mold.

On the other hand, unnecessary parts such as burrs and the like can be removed from the product formed with the laser cutter 50 or the like as needed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims. There will be. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: magnesium plate 20: electrode
30: upper die 40: lower die

Claims (3)

A method of molding magnesium by press working,
Blanking the magnesium plate;
Holding both ends of the blanked magnesium plate using an electrode;
Increasing the temperature of the magnesium plate by applying electricity to the blanked magnesium plate through an electrode; And
Molding the heated magnesium plate by press working;
And forming a magnesium plate on the surface of the magnesium plate.
The method according to claim 1,
Wherein the temperature of the magnesium plate is increased up to 250 ° C.
The method according to claim 1,
Wherein the electrode is a copper electrode.
KR1020150184902A 2015-12-23 2015-12-23 Forming method of magnesium alloy sheet KR20170075352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150184902A KR20170075352A (en) 2015-12-23 2015-12-23 Forming method of magnesium alloy sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150184902A KR20170075352A (en) 2015-12-23 2015-12-23 Forming method of magnesium alloy sheet

Publications (1)

Publication Number Publication Date
KR20170075352A true KR20170075352A (en) 2017-07-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150184902A KR20170075352A (en) 2015-12-23 2015-12-23 Forming method of magnesium alloy sheet

Country Status (1)

Country Link
KR (1) KR20170075352A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200079015A (en) * 2018-12-24 2020-07-02 (주)광진기계 Fabrication method of magnesium part for vehicle using movable heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200079015A (en) * 2018-12-24 2020-07-02 (주)광진기계 Fabrication method of magnesium part for vehicle using movable heater

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E902 Notification of reason for refusal
E601 Decision to refuse application