KR100777829B1 - Apparatus and method for manufacturing amorphous metal plate - Google Patents

Abstract

An apparatus for manufacturing an amorphous metal plate is provided to improve yield and characteristics of the amorphous metal plate by performing melting and pressing in the same chamber and stage, and a method for manufacturing an amorphous metal plate using the apparatus is provided. An apparatus for manufacturing an amorphous metal plate comprises: a lower mold part(20) which can be rapidly cooled, which has a melting area(21) and a plate forming area formed on an upper surface thereof, which has a slope(X) such that the melting area is higher than the plate forming area, and which is installed such that the slope is variable to a relatively horizontal state when a pressure is applied to the lower mold part; an energy applying part(50) disposed to melt the metallic material by applying energy to a metallic material laid down on the melting area; and an upper press part(30) for pressing the molten metal into a desired shape when molten metal is positioned on the plate forming area of the lower mold part.

Description

Amorphous metal plate manufacturing apparatus and method {APPARATUS AND METHOD FOR MANUFACTURING AMORPHOUS METAL PLATE}

1 is a view schematically showing a conventional amorphous metal plate production apparatus.

Figure 2 is a schematic configuration diagram of an amorphous metal plate manufacturing apparatus according to a preferred embodiment of the present invention.

3 is a front view schematically showing an apparatus for producing an amorphous metal sheet of the present invention.

4 is a perspective view of some components of the amorphous metal plate manufacturing apparatus of the present invention, showing a portion of FIG.

5 is a view for explaining the lower mold portion of the amorphous metal sheet production apparatus of the present invention.

Figure 6 is a view showing for explaining the elastic member of the amorphous metal plate production apparatus of the present invention, a left side view of the lower mold portion and the mold support.

7 is a photograph of an amorphous metal plate obtained in a preferred embodiment of the present invention.

* Description of Major Symbols in Drawings *

10 chamber 11 chamber housing

20: lower mold portion 21: melting area

22: plate forming area 23: hinge

24a, 24b, 24c: elastic member 25: spring holder

26: cooling medium passage 30: upper press portion

31 pressurization part 40 mold support part

50: energy applying unit 51: arc discharge rod

60: cooling medium supply 61: cooling medium supply hose

X: Incline

TECHNICAL FIELD This invention relates to the field of amorphous metal plate manufacture. Specifically, It is related with the apparatus and the method of manufacturing the amorphous metal plate of a thick plate by the pressing method.

Amorphous metals are prepared by rapid cooling and solidifying before crystallization occurs, and have various characteristics of amorphous crystalline metals. For example, it has high strength, good corrosion resistance, excellent soft magnetic properties, and excellent wear resistance. However, metals are difficult to produce amorphous metals or alloys due to the rapid progress of crystallization and solidification. Therefore, the production of amorphous metal sheets in the mass production was mostly made of a thin plate by roll casting. Recently, due to the above-described properties of amorphous metals, they are widely used in golf heads, putters, transformer materials, video magnetic heads, and the like.

1 is a view schematically showing a conventional amorphous metal plate production apparatus. Conventional amorphous metal plate production apparatus and method uses a method of melting the metal material (6), and then push or squeeze the molten metal into the cavity (4). That is, as shown in the left figure of FIG. 1, after the melting region is provided on one side of the lower mold 2 on which the cavity 4 is formed, the metal material 6 placed at the site is dissolved by arc discharge, and then, in FIG. As shown in the right figure, the molten metal 6 'is pressed into the inclined upper mold 3, pushed into the cavity 6, and quenched while pressing. Moreover, since the conventional manufacturing apparatus and method are provided separately with the melting stage (left side in FIG. 1) and the press stage (right side in FIG. 1), the lower mold 2 after melting of the metal material 6 in the melting stage. Should be quickly transferred to the press stage on the right.

Such conventional manufacturing apparatus and methods have various problems. First, the molten metal 6 'often flows down because it must be quickly transported laterally or horizontally to the press stage before crystallization or solidification after melting of the metal material 6 in the melting stage. This molten metal not only contaminates the mold but also causes the loss of raw materials. In addition, the conventional technology forcibly squeezes or pushes the molten metal 6 'into the cavity 4 by using the upper mold 3, so that a large amount of remaining metal containing crystallized metal is generated in the molten region. There is a disadvantage in that the fine crystalline material produced by contact with the lower mold during melting is incorporated into the amorphous metal plate produced. The two problems described above eventually lead to lowering the production yield and deteriorating the characteristics of the amorphous metal sheet. Furthermore, in such a conventional manufacturing apparatus and method it was not possible to control the thickness of the plate to be manufactured.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object thereof is to provide an apparatus for producing an amorphous metal sheet, in which melting and pressing are performed in the same chamber and stage, and the yield and characteristics are improved.

Another object of the present invention is to provide a method for producing an amorphous metal sheet.

An apparatus for manufacturing an amorphous metal sheet according to an object of the present invention is: a lower mold portion capable of rapid cooling, wherein a sheet forming region is formed at a region adjacent to a melting region and a melting region at an upper surface portion, and a melting region is higher than a sheet forming region. A lower mold portion installed to be variable to a relatively horizontal state when a pressure is applied thereto; An energy applying unit arranged to dissolve the metal material by applying energy to the metal material placed in the melting region; And an upper press portion for pressing the molten metal to form a desired shape when the molten metal is positioned in the plate forming region of the lower mold portion. When the molten metal is dissolved in the molten region of the lower mold portion, the molten metal is inclined to the lower mold portion. By the pressing of the upper press portion to reach a relatively horizontal state, and the sheet flowing into the sheet forming region at the same time as the pressing of the upper press portion rapidly enters into contact with the upper press mold and the lower mold. Cooling solidifies.

The lower mold is supported by at least one elastic member from below the molten region portion side to have the above inclination.

Further, the inclination of the lower mold is preferably 0.1 to 7 degrees.

Preferably, the elastic member is a spring detachably mounted, and the total elastic force is adjusted by changing the number or type of springs.

Also, preferably, the melting region is formed of a groove of a bath type.

Preferably, the energy applying unit uses an arc discharge.

Preferably, the apparatus further includes a cooling medium supplyer for supplying a cooling medium to the lower mold part, and the lower mold part includes a plurality of cooling medium passages or spaces in which the cooling medium passes.

Preferably, the upper press portion uses a forging press.

Preferably, the apparatus further comprises an upper press cooling means for rapidly cooling the upper press portion, wherein the upper press portion is pre-cooled before pressing the molten metal when pressing the molten metal.

According to another aspect of the present invention, there is provided a method of manufacturing an amorphous metal sheet: a sheet forming region is formed at a region adjacent to the melting region and the melting region at an upper surface portion, and the molten region has an inclination so as to be higher than the sheet forming region, and the inclination is Preparing a lower mold portion, which is installed to be variable to a relatively horizontal state when a pressure is applied; Disposing a metal material in a melting region of the lower mold part; A dissolving step of dissolving the metal material such that the molten metal flows into the plate forming region of the lower mold; Pressing the molten metal introduced into the sheet forming region to have a desired shape; And rapidly cooling the molten metal at or below the critical rate necessary to obtain amorphous tissue simultaneously with or immediately after pressing.

Preferably, the lower mold part is supported by an elastic member capable of adjusting the lower elastic force on one side thereof to achieve the inclination, and the cooling rate of the molten metal and the thickness of the plate to be manufactured are adjusted by adjusting the elastic force.

Preferably the dissolution step uses an arc discharge and the pressing step uses a forging press.

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

2 is a schematic configuration diagram of an amorphous metal plate manufacturing apparatus according to a preferred embodiment of the present invention.

2, the apparatus for manufacturing an amorphous metal plate according to the present invention may include a lower mold part 20 having a slope installed in the chamber 10. The lower mold part 20 is preferably supported by the elastic member 24a from below one side thereof to have an inclination. The other end of the lower mold part 20 is preferably rotatably coupled to the mold support part 40 via a hinge 23. The melting region 21 is formed at one side of the upper surface portion of the lower mold part 20, and the plate forming region 22 is formed at the portion adjacent to the melting region 21. Preferably, the molten region 21 and the plate forming region 22 are formed adjacent to each other. The upper press part 30 is installed above the lower mold part 20 so as to be liftable by the pressing part 31. In addition, an energy applying section 50 for dissolving a metal material (not shown) placed in the melting region 21 of the lower mold section 20 is provided. The energy applying unit 50 may include, for example, an arc discharge rod 51. The lower mold part 20 is connected to a cooling medium supplier 60. The cooling medium supplier 60 operates when the metal is melted in the lower mold part 20 to protect the lower mold part 20, and rapidly cools the lower mold part 20 and the molten metal during pressing. Preferably, the upper press 30 may also be connected to a cooling medium supplier 60, which is a cooling means, and may be simultaneously cooled with the lower mold part 20. Unexplained reference numeral 25 in FIG. 2 is described again below as a spring holder.

As can be seen from FIG. 2, the molten metal (not shown) dissolved in the melting region 21 is smoothly introduced into the sheet forming region 22 by the inclination of the lower mold part 20. When the molten metal flows into the plate forming region 22, the upper press part 30 descends to press the molten metal. At this time, the lower die portion 20 reaches a relatively horizontal state by the pressing of the upper press portion 30, and the molten metal in the sheet metal forming region 22 is deformed into a desired shape by the pressing. Before melting and pressing, the cooling medium supplier 60 supplies the cooling medium to the lower mold part 20 and the upper press part 30 to cool the mold and the pressed plate. The cooling rate is a speed above the critical cooling rate at which the amorphous tissue is formed, and by this rapid cooling, a metal sheet of the desired amorphous tissue is obtained. The amorphous metal obtained in the present invention is meant to include an alloy, and likewise, the metal sheet is also meant to include an alloy sheet.

This configuration of the present invention, unlike the prior art described above, the lower mold portion 20 does not need to be moved in the horizontal and lateral direction, as a result the solidification speed is faster and safer process compared to the previous process. In addition, a relatively high yield process can be performed due to the provided lower mold slope. In addition, this configuration of the present invention, although will be described later, has the advantage that the thickness control of the amorphous metal sheet to be produced is possible.

3 is a front view schematically showing an apparatus for producing an amorphous metal sheet of the present invention. 4 is a perspective view of some components of the amorphous metal sheet manufacturing apparatus of the present invention, showing a portion of FIG. 5 is a view for explaining the lower mold portion of the amorphous metal plate production apparatus of the present invention. FIG. 6 is a view for explaining an elastic member of the amorphous metal plate production apparatus of the present invention, and shows a left side view of the lower mold part and the mold support part. For convenience of understanding in Figures 3 to 6 it will be seen that some of the components of the present invention in each drawing are omitted.

2 to 6 will be described in more detail with respect to the manufacturing apparatus of the amorphous metal plate of the present invention.

The manufacturing apparatus of this invention includes the lower metal mold | die part 20 arrange | positioned in the chamber 10 formed by the chamber housing 11. The lower mold part 20 includes a molten region 21 and a plate forming region 22 adjacent thereto at an upper surface portion thereof. The melt zone 21 is preferably formed as a bath recess. In the melting of the metal material, the crystalline material is minutely generated by cooling the mold at the lower portion of the melting region 21. The bath groove prevents the crystalline material generated under the molten region 21 from being mixed into the molten metal in the sheet forming region 22 and into the amorphous tissue to be produced. Thus, it helps to obtain a plate having a more pure amorphous tissue. The sheet forming region 22 may be a planar shape or a cavity having a shape.

The lower mold part 20 of the present invention has an inclination such that the molten region 21 is higher than the plate forming region 22. The preferred inclination of the lower mold 20 (indicated by 'X' in FIG. 5) is 0.1 to 7 degrees. By changing the number and type of elastic members (springs) to provide such a slope it is possible to control the cooling rate and the thickness change of the plate. This inclination of the present invention should be installed to be variable to a relatively horizontal state when pressure is applied. This is basically implemented by the elastic members 24a, 24b and / or 24c installed to support the lower mold part 20 under one side of the lower mold part 20. Preferably, the lower mold part 20 is disposed on the mold support part 40, and the other end of the lower mold part 20 is rotatably coupled to the mold support part 40 by the hinge 23, and one side part is connected to the mold support part 40. It is supported by the elastic members 24a, 24b, and 24c interposed between them. The elastic members 24a, 24b and 24c are preferably installed to enable adjustment of the overall elastic force. To this end, as can be seen in Figure 6, the elastic members 24a, 24b and 24c may be at least one or more springs detachably mounted. Therefore, the total elastic force can be adjusted by changing the number or type of springs. In the case of this embodiment in which the spring is employed as the elastic members 24a, 24b and 24c, as shown in the drawing, a protruding spring installed to correspond to the lower surface of the lower mold portion 20 and the upper surface of the mold support portion 40, respectively. The holder 25 may be formed to mount a spring.

One or more spring-shaped elastic members 24a, 24b, and 24c interposed between the lower mold part 20 and the mold support part 40 are shown in this embodiment, but those skilled in the art are not necessarily limited to this embodiment. You will know. For example, it is also possible in the form of an elastic body to suspend the corresponding portion of the lower mold portion 20 to the ceiling portion of the upper chamber 10. In addition, the lower mold portion may be inclined, and the pressing angle may be reduced to a horizontal state while the inclination angle is reduced, and any configuration capable of adjusting the speed of reaching the horizontal state may be sufficient.

The lower mold part 20 is connected to a cooling medium supplier (see FIG. 2) to supply a cooling medium. Preferably, in this embodiment, as can be seen in Figure 5, the lower mold portion 20 is formed with a plurality of cooling medium passages 26 or a space for receiving the cooling medium through which the cooling medium passes, supplying the cooling medium The hose 61 or pipe can be connected to implement this. The cooling medium used is preferably cooling water, and other various gas and liquid media may also be used. The cooling medium is supplied to the cooling medium passage 26 of the lower mold part 20 to cool the lower mold part 20, and to cool the molten metal pressed in the plate forming region 22.

The apparatus for producing an amorphous metal plate according to the present invention includes an energy applying unit 50 (see FIG. 2) for dissolving a metal material placed in the melting region 21 of the lower mold portion 20. The energy applying unit 50 preferably uses arc discharge and thus includes an arc discharge rod 51. However, in addition to the arc discharge, other elements, such as electron beams, may be applied to the metal material to dissolve the metal material by applying a high energy having a temperature above the melting point.

The upper press part 30 is installed above the lower mold part 20. The upper press part 30 preferably presses the molten metal introduced into the plate forming region 22 by the pressing part 31 such as a hydraulic cylinder or a motor to have a desired shape. In this embodiment, the upper press section 30 is a forging press. However, rolls and the like for roll casting may be applied in addition to the forging press. In addition, it may preferably further comprise an upper press cooling means for rapidly cooling the upper press portion (30). To this end, as can be seen in Figure 2, like the lower mold portion 20, the cooling medium supplier 60 may be connected to the upper press portion 30.

Hereinafter, the manufacturing method of the present invention will be described in conjunction with the description of the operation of the amorphous metal sheet production apparatus of the present invention.

Referring to FIG. 2, first, a method of manufacturing an amorphous metal plate of the present invention will be described. First, a step of preparing the lower mold part 20 as described above is performed.

Subsequently, a metal material is disposed in the melting region 21 of the lower mold part 20.

Subsequently, a temperature above the melting point is applied to the metal material through the arc discharge rod 51, which is the energy applying unit 50, to dissolve the metal material, and the molten metal generated is transferred to the plate forming region 22 of the lower mold part 20. Allow inflow. This is naturally achieved by the inclination X of the lower mold part 20 of the present invention.

Next, pressing the molten metal introduced into the plate forming region 22 of the lower mold portion 20 using the upper press portion 30 to have a desired shape.

Subsequently, a step of rapidly cooling the molten metal at a cooling rate equal to or higher than a critical speed required to obtain amorphous tissue simultaneously with pressing is performed. This is achieved by supplying a cooling medium to the lower mold part 20 and the upper press part 30 through the cooling medium supplier 60.

The change of the total elastic force of the elastic members 24a, 24b, and 24c used in the apparatus and method for producing an amorphous metal sheet of the present invention is a difference in the speed of the operation in which the lower mold part 20 is in a horizontal state in an inclined state. Will bring. This will bring about a difference in the range in which the molten metal spreads in the plate forming region 22. Therefore, the thickness of the amorphous metal sheet obtained by adjusting the elastic force of the elastic member can be adjusted. In addition, the difference in the elastic force of the elastic member brings a difference in the speed that the lower mold portion reaches horizontal. In other words, this means a difference in speed at which the lower mold part 20 and the upper press part 30 reach a state in which the molten metal is pressed in parallel with each other. Since this state is a state where full-scale cooling is performed, the faster the state is reached, the faster the cooling rate. The cooling rate is also directly related to the thickness of the amorphous metal sheet that can be obtained. The faster the cooling rate, the thicker the plate.

7 is a photograph of an amorphous metal plate obtained in a preferred embodiment of the present invention. As shown in Figure 7 is processed into an irregular circular shape, the point portion is usually the size of the plate that can be effectively used. In this manner, the size and thickness of the plate obtained in accordance with the change of the elastic force of the elastic members 24a, 24b and 24c in this embodiment is shown in Table 1 below.

Number of elastic members Size and thickness of manufactured plate spring One Size: 110 ㅧ 62, Thickness: 0.8 2 Size: 90 ㅧ 50, Thickness: 1.2 Three Size: 60 ㅧ 45, Thickness: 2.0

Table 1 shows the results obtained by changing the number of springs which are elastic members in this embodiment. The results in Table 1 were also obtained using springs with a maximum load of 72 kg on a 50 ton press. As can be seen from the table, the size and thickness of the plate produced is changed according to the difference in the number of springs, and further it can be seen that the thickness of the plate can be adjusted using this.

The apparatus and method for manufacturing an amorphous metal plate according to the present invention does not require horizontal movement of the lower mold part after the metal material is dissolved in the lower mold part. Therefore, there is an advantage that pressing can be performed almost simultaneously with dissolution. This leads to a shortening of the solidification time and results in a high quality amorphous structure that is relatively free of crystalline materials. In addition, a constant inclination is provided in the lower mold part to smoothly flow molten metal into the cavity region and then press to reduce the amount of residual molten metal in the bath groove. In addition, by adjusting the elastic force of the elastic member installed in the lower mold portion, the cooling rate, the size and thickness of the plate can be controlled. In addition, when the metal material is dissolved, a crystalline material is generated at the lower part of the melting region due to the temperature of the mold. The bath groove prevents the crystalline material generated under the molten region from being mixed into the molten metal in the sheet forming region and the amorphous tissue to be produced. Thus, it helps to obtain a plate having a purer amorphous tissue.

Claims (12)

In the apparatus for producing amorphous metal sheet: A lower mold portion 20 capable of rapid cooling, wherein a sheet forming region 22 is formed in a region adjacent to the melting region 21 and the melting region 21 at an upper surface portion, and the melting region 21 is the sheet material. A lower mold part 20 having an inclination X so as to be higher than a molding area 22, and the inclination X being variable to a relatively horizontal state when a pressure is applied thereto; An energy applying unit (50) disposed to dissolve the metal material by applying energy to the metal material placed in the melting region (21); And When the molten metal is located in the sheet metal forming region 22 of the lower mold portion 20, the upper press portion 30 for pressing to form the molten metal in a desired shape, When the metal material placed in the melting region 21 of the lower mold portion 20 is dissolved, molten metal flows into the plate forming region 22 by the inclination X of the lower mold portion 20. The inclination (X) is reached to a relatively horizontal state by pressing the upper press portion (30), the lower mold portion (20) is an amorphous metal plate manufacturing apparatus which is rapidly cooled simultaneously with the pressing of the upper press portion (30). The method of claim 1, And the lower mold is supported by at least one elastic member (24a, 24b and 24c) from below the melting region (21) to have the inclination (X). The method of claim 1, The inclined X of the lower mold is 0.1 to 7 degrees amorphous metal plate manufacturing apparatus. The method of claim 2, The elastic members (24a, 24b and 24c) is a spring that is detachably mounted, the amorphous metal plate manufacturing apparatus that the overall elastic force is adjusted by changing the number or type of springs. The method of claim 1, The melting region 21 is an amorphous metal plate manufacturing apparatus that is a bath groove. The method of claim 1, The energy applying unit 50 is an amorphous metal plate manufacturing apparatus using an arc discharge. The method of claim 1, Further comprising a cooling medium supplier 60 for supplying a cooling medium to the lower mold unit 20, The lower mold unit 20 has a plurality of cooling medium passages 26 through which the cooling medium passes or an apparatus for manufacturing an amorphous metal sheet having a space for receiving the cooling medium. The method of claim 1, Further comprising an upper press cooling means for rapidly cooling the upper press portion 30, The upper press portion 30 is an amorphous metal sheet manufacturing apparatus that is cooled at the same time as pressing when pressing the molten metal. In the amorphous metal sheet manufacturing apparatus, Chamber 10; A mold support part 40 installed in the chamber 10; It is disposed on the mold support 40, the basal groove of the melting region 21 is formed on one side of the upper surface, the plate forming region 22 is formed on the other side, the other end is the mold support 40 And hinges 23, one side of which is supported by one or more springs detachably mounted between the mold support 40 and the inclined region so that the melting region 21 is higher than the plate forming region 22. (X), the lower mold portion 20 capable of rapid cooling by having a plurality of cooling medium passages 26 to allow the cooling medium to pass therethrough; An arc discharge electrode for dissolving a metal material placed in the melting region 21; And An upper forging press disposed above the lower mold part 20 in the chamber 10 to press the molten metal when the molten metal flows into the plate forming region 22 of the lower mold part 20; And When the molten metal is pressed by the upper forging press, includes a cooling medium feeder 60 for supplying a cooling medium for cooling the lower mold portion 20 and the upper forging press, When the metal material placed in the bath groove of the lower mold part 20 is dissolved, molten metal is introduced into the plate forming region 22 by the inclination X of the lower mold part 20, and the inclined ( X) is reached to a relatively horizontal state by the pressing of the upper press portion 30, the lower mold portion 20 is cooled during dissolution, and rapidly cooling the plate introduced at the same time as the pressing of the upper press portion 30. Amorphous metal sheet production apparatus. In the method for producing an amorphous metal sheet, A melting zone 21 and a sheet forming region 22 are formed at an upper surface portion and adjacent to the melting region 21, and the inclination X is raised such that the melting region 21 is higher than the sheet forming region 22. The inclination (X) has a step of preparing a lower mold portion 20, which is installed to be variable to a relatively horizontal state when a pressure is applied; Disposing a metal material in the melting region 21 of the lower mold part 20; A dissolving step of dissolving the metal material so that molten metal flows into the plate forming region 22 of the lower mold part 20; Pressing the molten metal introduced into the plate forming region (22) to have a desired shape; And And simultaneously cooling the molten metal to a cooling rate at or above a critical speed necessary to make the molten metal into an amorphous structure. The method of claim 10, The lower mold part 20 is supported by elastic members 24a, 24b, and 24c in which one side of the lower side is capable of adjusting the total elastic force so as to form the inclination X, and the cooling rate of the molten metal by adjusting the elastic force And a method of manufacturing an amorphous metal plate in which the thickness of the plate produced is controlled. The method of claim 10, The dissolving step is a method of producing an amorphous metal plate using an arc discharge.

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