TW201318760A - Method for combining compound metal and method for partly combining compound metal - Google Patents

Abstract

A method for combining a compound metal including the following steps is provided. A first metal is provided. The first metal is stamped to form a member, wherein the member has a concave surface. A second metal is provided on the concave surface. The second metal is pressed into the concave surface of the member by forging press and an assembly is therefore formed by combining the second metal and the member. Otherwise, a method for partly combining a compound metal similar with said method for combining a compound metal is also provided.

Description

Combination method of composite metal material and local bonding method of composite metal material

The invention relates to a method for bonding composite metal materials, in particular to a method for bonding a composite metal material which is stamped and then forged.

The combination of metallic materials is widely used in devices such as semiconductor components or mechanical products. For example, the combination of the outer casing and the inner member of each electronic product or the joint of the mechanical bearing. As the dimensional precision requirements of various products become more stringent, the combination of metal materials is not just a combination of a plurality of materials. The combination of the strength of the two metal materials, the appearance of the combination, the precision of the dimensions, the fineness of the complex shape, etc. are all important indicators of the strength of the combination of today's judgments, so that the combination of a plurality of metal materials can achieve the desired effect.

Today, metal materials are often joined by soldering or by applying an adhesive, but the choice of solder material or the use of the adhesive must match the metal material. Moreover, when the combined size is more precise and the shape is more complicated, the bonding force is not uniform by welding or applying an adhesive, and the metal material after bonding is easily deformed or loosened.

Therefore, there is a need in the industry for a combination of composite metal materials, which can solve the problem of the combination of the above metal materials.

The invention provides a method for combining composite metal materials and a partial bonding method for composite metal materials, which are formed by stamping and forging, so that the advantages of stamping and forging can be simultaneously provided and the lack of both can be eliminated at the same time.

The invention provides a method for bonding a composite metal material, comprising the following steps. First, a first metal material is provided. Next, a stamping molding die is provided, and the stamping molding die has a stamping die and a stamping die of a specific shape. Subsequently, the first metal material is placed in the stamping cavity and subjected to a stamping process to form the first metal material into a component, wherein the component has a concave surface and a plurality of first outer fillets. In addition, a forging die is provided, and the forged die has a specific shape of forging die and forged die. Thereafter, a second metallic material is provided on the concave surface. Then, the second metal material and the component are placed in the forging cavity and the forging process is performed, and the second metal material is pressed and filled on the concave surface of the component by the forging pressure, and the second metal material is combined with the component to form a combination. And the joint has a plurality of second rounded corners.

The invention provides a partial bonding method of a composite metal material, comprising the following steps. First, a first metal material is provided. Subsequently, a stamping forming die is provided, and the stamping forming die has a stamping die and a stamping die of a specific shape. Continuing, the first metal material is placed in the stamping cavity and subjected to a stamping process to form the first metal material into a component, wherein the component has at least one concave region and a plurality of first outer fillets. In succession, a forging die is provided, and the forged die has a specific shape of forging die and forged die. Thereafter, a second metallic material is provided on the recessed area. Then, the second metal material and the component are placed in the forging cavity and subjected to a forging process, and the second metal material is pressed and filled into the concave portion of the component by the forging pressure, and the second metal material and the component are combined to form a An assembly, and the assembly has a plurality of second bullns.

Based on the above, the present invention proposes a bonding method of a composite metal material and a partial bonding method of the composite metal material, which combines a plurality of materials by a method of first stamping and forging. In this way, the invention can reduce the process cost, increase the dimensional precision, the fineness of the pattern, and improve the surface roughness, etc., so that the surface is more beautiful. Moreover, the bonding force between the materials is increased, and the material bonding is more stable.

The combination method of the composite metal material or the partial bonding method of the composite metal material is widely applied to various semiconductor structures, electronic products, mechanical components and the like. Hereinafter, a metal button forming method is taken as an example to clearly disclose the present invention, but The bonding method of the composite metal material of the present invention or the partial bonding method of the composite metal material is not limited to this example.

1 to 3 are schematic cross-sectional views showing a method of molding a metal button according to a first embodiment of the present invention. As shown in Fig. 1, a case metal material 110' is first provided. The material of the case metal material 110' is, for example, a stainless steel metal or a titanium alloy. Of course, it can also be a material suitable for use as a casing such as zinc or copper, which has a desired hardness and an attractive metallic luster.

Next, a press forming mold is provided. The stamping die has a stamping die and a stamping die of a specific shape. The shell metal material 110' is placed in the stamping cavity. A stamping process is performed to press the shell metal material 110' to form a button housing 110. In a preferred embodiment, a protective film may be applied to one surface S1 of the housing metal material 110' to protect an outer surface S2 of the key housing 110.

In detail, the button housing 110 has a receiving portion 112 and a thin housing 114. In this embodiment, the shape of the housing metal material 110' may be, for example, a metal plate to form the key housing 110 via one stamping, but the invention is not limited thereto. In addition, the shell metal material 110' can also be formed into different shapes via stamping. For example, in this embodiment, a button housing 110 is formed, but in other embodiments, a plurality of button housings 110, or other shaped button housings 110, may be formed at a time via stamping. The key housing 110 of the present invention is only used to clearly disclose the present invention, but is not intended to limit the present invention.

Thereafter, the thin case 114 is selectively patterned to form a through hole T in the key housing 110. The through hole T is, for example, a trademark, an instruction, or the like, and is displayed on the outer surface S2 of the thin case 114 for the user to recognize. The method of patterning the thin casing 114 may be, for example, performing a laser drilling process to facilitate forming a through hole in the key housing 110, but the invention is not limited thereto. In an embodiment, the through holes T may be arranged, for example, in a pattern.

A forged mold is provided. The forged mold has a specific shape of a forged cavity and a forged die. As shown in FIG. 2, a metal filled blank 120 is provided in the accommodating portion 112. The material of the metal filled blank 120 includes an aluminum alloy or a plastic. Next, the metal filled blank 120 and the key housing 110 are placed in the forging cavity and subjected to a forging process. As shown in FIG. 3, a forging process is performed, a pressure P is applied to the metal-filled blank 120, and the metal-filled blank 120 is pressed and filled in the receiving portion 112 of the key housing 110 to form a solid metal button 130. The material of the metal filled blank 120 is preferably a soft material suitable as a metal filled blank. In a preferred embodiment, the hardness of the shell metal material 110' is greater than the hardness of the metal fill stock 120. As a result, the forged metal-filled blank 120 can be properly fitted to the thin casing 114 due to deformation, but does not excessively deform the key housing 110, so that the desired structure of the solid metal button 130 cannot be achieved.

The spirit of the present invention: the button housing 110 formed after stamping is a preliminary prototype of the finished product to be formed, but the stamped key housing 110 cannot meet the required precision requirements in various details and dimensions, and thus the present invention The button housing 110 is then forged to form a solid metal button 130. For example, the button housing 110 can form a fine pattern having a partial thickness and a more complicated shape by forging. For example, the button housing 110 including a flat surface may be formed by forging to form a solid metal button 130 having a curved shape in whole or in part. Generally, the casing metal material 110' may be fully or partially stamped in the process, one or more stampings, depending on actual needs. For example, the housing metal material 110' may be fully stamped once to obtain the button housing 110, and then the portion of the key housing 110 that requires higher precision is subjected to one or more partial forgings to achieve A solid metal button 130 of the required accuracy. In this way, the production cost can be reduced and the structural quality of the solid metal button 130 can be increased.

Specifically, the button housing 110 as shown in FIGS. 1-2 has a plurality of first rounded corners C1, and the solid metal button 130 as shown in FIG. 3 has a plurality of second rounded corners C2, wherein The second rounded corner C2 is obtained by forging the key housing C1 with the first outer round corner C1. In the present embodiment, the radius of the first outer round corner C1 can be reduced after forging; in other words, the radius of the first outer round corner C1 is larger than the radius of the second outer round corner C2. In the current process technology, the radius of the first bullnose C1 is greater than 0.5 millimeters (mm), and the radius of the second bullnose C2 may be less than 0.3 millimeters (mm).

Furthermore, the stamping process of the key housing 110 is preferably performed at a normal temperature. The forged button housing 110 is preferably carried out at normal temperature. In this way, the cost of the mold can be reduced. Moreover, since the button housing 110 is formed as a solid metal button 130 in a solid state, the material of the button housing 110 does not flow due to melting during the forging process, thereby preventing the surface quality of the formed solid metal button 130. Deteriorated due to material flow. The surface of the solid metal button 130 formed by this method can achieve better metallic gloss, and even the mirror effect of the surface of the solid metal button 130 can be achieved, and the appearance of the solid metal button 130 can be increased.

In addition, the button housing 110 and the metal filling blank 120 may also increase the pressure P according to the actual requirement of the bonding strength, or apply an adhesive (not shown) between the metal filling blank 120 and the button housing 110. The metal filled blank 120 is more firmly bonded to the key housing 110.

Moreover, after the solid metal button 130 is formed, the thin shell 134 of the solid metal button 130 (which is forged by the thin shell 114 of the button housing 110) can be surface treated (not shown). For example, a polishing process is performed to make the thin casing 134 smoother and more beautiful, or a physical vapor deposition process is performed to form a protective layer (not shown) on the thin casing 134 to protect the casing and increase the wear resistance thereof. .

In view of the above, the present invention forms a solid metal button 130 by means of stamping and forging first: (1) Compared with the current single forging method, the process cost can be reduced by stamping to form a preliminary shape, and the room temperature is stamped and The forging prevents the shell metal material 110' from flowing due to melting during the process, which can increase the surface aesthetics and increase the process yield; (2) compared to the current single stamping method, by reforging The accuracy of the dimensional increase, for example, the bending curvature of the bending angle between the two surfaces; (3) Compared with the current single metal injection molding method, the present invention does not have the problem of excessive reduction ratio and void formation on the surface. In summary, the method of forming a solid metal button 130 by stamping and forging first can increase the dimensional accuracy and pattern fineness of the solid metal button 130, and improve the surface quality of the solid metal button 130, etc., and increase the surface quality. The aesthetics of the solid metal button 130 and the effect of reducing process cost.

Furthermore, the invention is also applicable to a method of metal button forming having a plurality of metal filled blanks. The following embodiments are presented to more clearly disclose the present invention, but the scope of application of the present invention is not limited thereto.

4 to 5 are schematic cross-sectional views showing a method of molding a metal button according to a second embodiment of the present invention. As shown in FIG. 4, the stamped key housing 110 has a housing portion 112 and a thin housing 114. A plurality of metal-filled blanks such as the first metal-filled blank 120a and the second metal-filled blank 120b are provided in the accommodating portion 112. The second metal filled blank 120b is placed in the receiving portion 112 of the button housing 110 when the forging process is performed. As shown, the first metal filled blank 120a and the second metal filled blank 120b can be placed horizontally side by side in the receiving portion 112, for example. Therefore, as shown in FIG. 5, after the button housing 110 is forged by applying the pressure P1 to the first metal filled blank 120a and the second metal filled blank 120b, a solid metal button 130a can be formed. At this time, the first metal filled blank 120a and the second metal filled blank 120b are side by side and closely adhere to a thin casing 134a.

6-7 are cross-sectional views showing a method of molding a metal button according to a third embodiment of the present invention. As shown in FIG. 6, the stamped key housing 110 has a receiving portion 112 and a thin housing 114. The first metal filled blank 120c and the second metal filled blank 120d are provided in the accommodating portion 112. As shown, the first metal filled blank 120c is positioned between the second metal filled blank 120d and the thin housing 114. Therefore, as shown in FIG. 7, after the button housing 110 is forged by applying the pressure P2 to the first metal filled blank 120c and the second metal filled blank 120d, a solid metal button 130b can be formed. At this time, the first metal filled blank 120c and the second metal filled blank 120d are stacked and closely attached to a thin casing 134b. In one embodiment, the first metal filled blank 120c is selected to be an insulating material and the second metal filled blank 120d is a conductive material to electrically insulate the second metal filled blank 120d from the thin housing 134b.

In another embodiment, the second metal filled blanks 120b, 120d are also placed between the thin shell 114 and the forging die during the forging process, depending on actual needs.

In addition, FIG. 8 is a cross-sectional view showing a method of molding a metal button according to a fourth embodiment of the present invention. As shown in FIG. 8, the metal filled blanks 220a, 220b, 220c, and 220d of the present embodiment are respectively located at four outer rounded corners (not shown) of the stamped key housing (not shown). In this way, four outer rounds (not shown) of the button housing (not shown) can be partially forged. For example, the forged solid metal button 130c has four fillets d1, d2, d3, and d4 having a radius of less than 0.3 millimeters (mm). Of course, this embodiment is an embodiment in which at least one metal-filled blank is located at a local position of the key housing, and the shape is shown for illustrative purposes only, and the present invention is not limited thereto.

The spirit of the present invention has been disclosed above by the method of forming a metal button, but the spirit of the present invention is not limited to the molding of metal buttons, and the application of the present invention can be summarized as follows.

9-10 are schematic cross-sectional views showing a method of bonding a composite metal material according to an embodiment of the present invention. A method of bonding composite metal materials may include the following steps. First, a first metal material 310' (corresponding to the above-described case metal material 110') is provided. Next, a stamping molding die is provided, and the stamping molding die has a stamping die and a stamping die of a specific shape. Then, the first metal material 310' is placed in the stamping cavity and subjected to a stamping process, and the first metal material 310' is stamped to form a component 310 (corresponding to the button housing 110 described above), wherein the component 310 has a concave surface. 312 (corresponding to the above-mentioned housing portion 112). Then, a forged die is provided, and the forged die has a specific shape of forged die and forged die. A second metallic material 320 (corresponding to the metal filled blank 120 described above) is then provided on the concave surface 312. Then, as shown in FIG. 10, the second metal material 320 and the component 310 are placed in the forging cavity and subjected to a forging process, and the second metal material 320 is pressed and filled on the concave surface 312 of the component 310 by the forging pressure P3. A bonding member 300 is formed in combination with the second metal material 320 and the component 310.

The application method of the composite metal material of the present embodiment has been described in the above metal button forming method, and therefore will not be described in detail.

For example, the hardness of the first metal material 310' is preferably greater than the hardness of the second metal material 320, so that the component 310 is not excessively deformed after forging, resulting in the structure of the bonding member 300 not meeting the demand. In one embodiment, the material of the first metal material 310' comprises a stainless steel metal or a titanium alloy, and the material of the second metal material 320 comprises an aluminum alloy. In a preferred embodiment, the stamping process is carried out at ambient temperature and the component 310 is forged at ambient temperature. In this way, the mold cost can be reduced and the aesthetics of the joint member 300 can be increased.

Furthermore, the member 310 has a plurality of first rounded corners C3, and the joint member 300 has a plurality of second rounded corners C4, wherein the second rounded corner C4 is obtained by the first rounded corner C3 via the forged part 310. Therefore, the radius of the first outer round corner C3 is larger than the radius of the second outer round corner C4. In a preferred embodiment, the radius of the first bullnose C3 is greater than 0.5 millimeters (mm) and the radius of the second bullnose C4 is less than 0.3 millimeters (mm). In this way, the coupling member 300 can have a more precise size and is suitable for fitting into a high precision mechanical component or semiconductor structure.

In addition, the first metal material 310' may be fully or partially, one or more stamped, and the part 310 may be fully or partially, one or more forged, to achieve the desired bond at the lowest process cost. 300 quality.

In addition, the method of increasing the bonding force between the component 310 and the second metal material 320 may be, for example, providing an adhesive (not shown) between the concave surface 312 and the second metal material 320; or alternatively, having different thermal expansion The first metal material 310' of the coefficient and the second metal material 320 are combined with a heating or cooling process so that the component 310 and the second metal material 320 can reach a predetermined bonding force at the operating temperature.

11 is a cross-sectional view showing a partial bonding method of a composite metal material according to an embodiment of the present invention. As shown in Fig. 11, first, a first metal material 410' is provided. Next, a stamping molding die is provided, and the stamping molding die has a stamping die and a stamping die of a specific shape. Then, the first metal material 410' is placed in the stamping cavity and subjected to a stamping process to press the first metal material 410' to form a part 410. Component 410 has four recessed regions 412a, 412b, 412c, and 412d. Thereafter, a forging die is provided, and the forged die has a specific shape of the forged die and the forged die. Then, a second metal material 420a, 420b, 420c, and 420d is provided on the concave regions 412a, 412b, 412c, and 412d, respectively. Thereafter, the second metal materials 420a, 420b, 420c, and 420d and the component 410 are placed in the forging cavity and subjected to a forging process, and the second metal materials 420a, 420b, 420c, and 420d are pressed and filled into the component 410 by forging pressure. The recessed regions 412a, 412b, 412c, and 412d partially combine the second metal materials 420a, 420b, 420c, and 420d and the member 410, respectively, to form an assembly 400.

The materials of the second metal materials 420a, 420b, 420c, and 420d may be the same or different, depending on actual needs. This embodiment illustrates a partial bonding method of a plurality of composite metal materials, but the number, position and shape of the metal materials combined are not limited to those shown in the drawings. Furthermore, the detailed process principle of the embodiment and the functions that can be performed are similar to the previous embodiment, and therefore will not be described again.

In conclusion, the bonding member 300 or the assembly 400 formed by the present invention is combined by a physical combination of direct pressure, so that it is currently welded or an adhesive is used (especially when applied to a curved surface, etc.) The complex adhesive surface, which has a more uniform bond, makes the bond stronger.

In the longitudinal direction, the present invention provides a method for bonding a composite metal material and a partial bonding method for the composite metal material, which combines a plurality of materials by means of stamping and forging. In this way, the invention can reduce the process cost, increase the dimensional precision, improve the precision of the pattern, and improve the surface roughness, etc., so that the surface is more beautiful. Compared with the conventional method of using a solder or an adhesive, the present invention can increase the bonding force between the materials and make the material combination more stable.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

110. . . Button housing

110’. . . Housing metal material

112. . . Housing

114. . . Thin shell

120, 220a, 220b, 220c, 220d. . . Metal filled blank

120a, 120c. . . First metal filled blank

120b, 120d. . . Second metal filled blank

130, 130a, 130b, 130c. . . Solid metal button

134, 134a, 134b. . . Thin shell

300. . . Joint piece

310, 410. . . component

310’, 410’. . . First metal material

312. . . Concave surface

320, 420a, 420b, 420c, 420d. . . Second metal material

400. . . Assembly

412a, 412b, 412c, 412d. . . Concave area

C1, C3. . . First fillet

C2, C4. . . Second fillet

D1, d2, d3, d4. . . Rounded corner

P, P1, P2, P3. . . pressure

S1. . . surface

S2. . . The outer surface

T. . . Through hole

1 to 3 are schematic cross-sectional views showing a method of molding a metal button according to a first embodiment of the present invention.

4 to 5 are schematic cross-sectional views showing a method of molding a metal button according to a second embodiment of the present invention.

6-7 are cross-sectional views showing a method of molding a metal button according to a third embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a method of molding a metal button according to a fourth embodiment of the present invention.

9-10 are schematic cross-sectional views showing a method of bonding a composite metal material according to an embodiment of the present invention.

11 is a cross-sectional view showing a partial bonding method of a composite metal material according to an embodiment of the present invention.

300. . . Joint piece

310. . . component

320. . . Second metal material

C4. . . Second fillet

P3. . . pressure

Claims (26)

A method for bonding a composite metal material, comprising: providing a first metal material; providing a stamping mold having a specific shape of a stamping cavity and a stamping die; placing the first metal material in the stamping Forming and performing a stamping process to form the first metal material into a part, wherein the part has a concave surface and a plurality of first outer rounds; providing a forging type mold, and the forging type mold has a specific shape Forging a cavity and forging a mold; providing a second metal material on the concave surface; and placing the second metal material and the component in the forging cavity and performing a forging process, wherein the second is made by forging pressure The metal material is pressed and filled on the concave surface of the component, and the second metal material is combined with the component to form a joint, and the joint has a plurality of second rounded corners. The method of bonding a composite metal material according to claim 1, wherein the hardness of the first metal material is greater than the hardness of the second metal material. The method for bonding a composite metal material according to claim 2, wherein the material of the first metal material comprises a stainless steel metal or a titanium alloy. The method for bonding a composite metal material according to claim 1 or 3, wherein the material of the second metal material comprises an aluminum alloy. The method of joining composite metal materials according to claim 1, wherein the radius of the first outer fillet is greater than the radius of the second outer fillet. The method of joining composite metal materials according to claim 5, wherein the radius of the first outer fillet is greater than 0.5 mm and the radius of the second outer fillet is less than 0.3 mm. The method for bonding a composite metal material according to claim 1, wherein the component stamping process is performed at a normal temperature. The method for bonding a composite metal material according to claim 1, wherein the forging process is performed at a normal temperature. The method for bonding a composite metal material according to claim 1, wherein the forging process is performed plural times. The method for bonding a composite metal material according to claim 1, wherein the first metal material and the second metal material have different thermal expansion coefficients. The method for bonding a composite metal material according to claim 1, wherein the step of providing the second metal material on the concave surface further comprises: providing an adhesive on the concave surface and the second metal material between. A partial bonding method of a composite metal material, comprising: providing a first metal material; providing a stamping molding die, wherein the stamping molding die has a specific shape of a stamping cavity and a stamping die; placing the first metal material thereon Stamping the cavity and performing a stamping process to form the first metal material into a part, wherein the part has at least one concave area and a plurality of first outer rounds; providing a forging type mold, and the forging type mold has a specific a forging die and a forged die; forming a second metal material on the concave region; and placing the second metal material and the component in the forging cavity and performing a forging process by forging pressure A second metal material is press-fitted into the concave region of the component and combined with the second metal material and the component to form an assembly, and the assembly has a plurality of second bullns. The method of partially bonding a composite metal material according to claim 12, wherein the hardness of the first metal material is greater than the hardness of the second metal material. The method of partially bonding a composite metal material according to claim 13, wherein the material of the first metal material comprises a stainless steel metal or a titanium alloy. The method of partially bonding a composite metal material according to claim 12 or 14, wherein the material of the second metal material comprises an aluminum alloy. The method of partially bonding a composite metal material according to claim 12, wherein a radius of the first outer fillet is greater than a radius of the second outer fillet. The method of partially bonding a composite metal material according to claim 16, wherein the radius of the first outer fillet is greater than 0.5 mm and the radius of the second outer fillet is less than 0.3 mm. The method of partially bonding a composite metal material according to claim 12, wherein the component stamping process is performed at a normal temperature. The method for bonding a composite metal material according to claim 12, wherein the forging process is performed at a normal temperature. The method of partially bonding a composite metal material according to claim 12, wherein the forging process is performed plural times. The method of partially bonding a composite metal material according to claim 12, wherein the first metal material and the second metal material have different thermal expansion coefficients. The method of partially bonding a composite metal material according to claim 12, wherein the step of providing the second metal material on the concave region further comprises: first providing an adhesive in the concave region and the first Between two metal materials. The method for bonding a composite metal material according to claim 12, wherein the stamping process of the first metal material is performed by performing a full stamping process on the first metal material, and the forging process of the component is A partial forging process is performed on the part. The partial bonding method of the composite metal material according to claim 12, wherein the stamping process of the first metal material is a partial stamping process of the first metal material, and the forging process of the component is A partial forging process is performed on the part. The method of partially bonding a composite metal material according to claim 12, wherein the providing the second metal material comprises providing a plurality of second metal materials in each of the concave regions on the concave region. The partial bonding method of the composite metal material according to claim 25, wherein the materials of the plurality of second metal materials are different.