TW201720545A - Method for manufacturing composite metal and structure thereof - Google Patents

Abstract

A composite metal structure includes a first metal body and a second metal body. The first has a surface. The surface is formed a plurality of concave grooves and a plurality of convex body. The convex body has a slot. The concave groove has a root width and a top width. The root width is greater than the top width. The second metal body is less than hardness of the first metal body. The second metal body is press-contacting the first metal body and whereby the concave grooves, the slots and the convex body bonding the first metal body.

Description

Composite metal manufacturing method and structure thereof

The invention relates to a bonding technology of a composite material, in particular to a composite metal and a manufacturing method thereof.

With the continuous advancement and development of technology, the application of composite materials in various products has become increasingly common, such as the casings and mechanical parts of mobile phones, tablet computers, notebook computers, etc.; fan blades, automobile and motorcycle parts, medical equipment, Appliance shells or spare parts, helmets; steam locomotive exterior parts and internal structural parts, aircraft interior and exterior parts, propellers, general hull structural parts, military steel helmets, bulletproof parts, sanitary equipment, building materials, etc. are numerous. The finished product produced by the product not only has the advantages of light weight, thinness, good appearance and the like, but also can effectively reduce electromagnetic wave leakage.

The conventional composite metal plate comprises a base layer, an active solder layer and an outer skin layer, the base layer comprises a structural strength metal; the active solder layer is on a first side surface of the base layer, and the active solder layer comprises an active solder The outer layer is located on an outer surface of the active solder layer, and the base layer, the active solder layer and the outer layer are sequentially stacked into one body, and then joined by explosion welding to form a composite metal plate.

However, the problem with composite metal sheets is that the use of explosive welding in the combination of layers and layers requires a large amount of energy, is high in risk, and is difficult to achieve mass production, and is prone to defective products in the manufacturing process, which is disadvantageous for reducing manufacturing costs and Improve production yield. The base layer and the outer layer are only bonded by means of solder, and are applied to a field subjected to shear force, which is liable to cause slippage and detachment of the base layer and the outer layer. Furthermore, the application of solder by means of explosive welding is not suitable for some specific metals (such as magnesium or magnesium alloys) and needs to be improved.

An object of the present invention is to provide a method for fabricating a composite metal and a structure thereof, which can improve the bonding fastness of a two-metal body, and can simplify the process and shorten the manufacturing time.

In order to achieve the above object, the present invention provides a method for fabricating a composite metal, the steps comprising: a) forming a plurality of protrusions on a surface of a first metal body, and forming a plurality of grooves between the protrusions And a recessed groove formed in each of the protrusions; b) superposing a second metal body on the surface of the first metal body, the hardness of the second metal body being less than the hardness of the first metal body; And c) crimping the first metal body and the second metal body with a presser to plastically deform each of the convex bodies such that a width of a root of the groove is greater than a width of a top of the groove, and The second metal body is embedded and coupled to each of the protrusions, the grooves, and the recesses.

In order to achieve the above object, the present invention provides a composite metal structure including a first metal body and a second metal body, the first metal body having a surface formed with a plurality of protrusions and formed on each of the protrusions a plurality of recesses between the bodies, each of the protrusions being respectively provided with a recessed groove having a width at a position away from the surface and a top width adjacent to the surface, the root width being greater than the top Width; the hardness of the second metal body is smaller than the hardness of the first metal body, and the second metal body is crimped onto the surface and is embedded and combined with each of the protrusions, the grooves and the recessed grooves.

The invention also has the following effects, using the respective grooves to form a shape that is large and small, and the second metal body can form a mechanically occluded riveting structure after invading each groove, and can not only withstand vibration, impact, heat rise and contraction, etc. In this case, it is more able to maintain the strength and integrity of the overall structure. The provision of the guiding structure and the guiding slope in the groove not only facilitates the intrusion of the second metal body into the respective grooves, but also greatly reduces the existence of the gap. The preparation method of the invention not only can rapidly produce in large quantities, but also greatly reduces the cost, and the finished product produced by the invention has many advantages such as light weight, thinness, high strength, good appearance quality and easy processing after molding.

The detailed description and technical content of the present invention are set forth in the accompanying drawings.

Referring to FIG. 1 and FIG. 5, the present invention provides a method for fabricating a composite metal, the steps of which include:

a) a plurality of protrusions 13 formed on a surface 11 of the first metal body 10, a plurality of grooves 14 formed between the protrusions 13 and a recessed groove 131 formed in each of the protrusions 13; Referring to FIG. 2 and FIG. 3, the first metal body 10 in this step may be a plate member or a cylindrical member made of a metal material having a high hardness such as a copper alloy or a stainless steel. The first metal body 10 has a first A surface 11 (or simply a surface) and a second surface 12 formed on the back side of the first surface 11. The forming process can be formed by rolling, stamping, laser, in-mold forming, etc. This embodiment is described by a roll processing method. When the first metal body 10 is conveyed by the conveyor belt, the roller is used. The first surface 11 is subjected to a rolling process by forming grooves, projections and ridges formed on the surface, that is, a plurality of continuous protrusions 13 and a plurality of grooves 14 can be simultaneously formed on the first surface 11. And most recessed slots 131.

The recessed groove 131 of each of the protrusions 13 may have a V-shaped cross section, and the depth D1 of the recessed groove 131 is greater than the depth D2 of the groove 14 (as shown in FIG. 3). Moreover, the shape of each convex body 13 can be rectangular (as shown in FIG. 2), cross (as shown in FIG. 8), triangular (as shown in FIG. 9), circular (as shown in FIG. 10), and six. The shape of the edge (as shown in Figure 11). In addition, each of the protrusions 13 may be a non-geometric or irregular shape in addition to various geometric shapes as in the foregoing embodiments.

Each of the grooves 14 may be laterally, longitudinally or obliquely spaced to form a plurality of elongated protrusions 13 (shown in FIG. 7) between the grooves 14; each of the grooves 14 may also be laterally a longitudinal cross arrangement or a two oblique cross arrangement to form a plurality of protrusions 13 between the grooves 14 (as shown in FIGS. 2, 7 to 11); or each groove 14 may also be wavy to A plurality of undulating projections 13 (shown in Fig. 12) are formed between the respective grooves 14.

b) stacking a second metal body 20 on the surface 11 of the first metal body 10, the hardness of the second metal body 20 being less than the hardness of the first metal body 10; the second metal in this step The body 20 may be a plate member made of a metal material having a low hardness such as an aluminum alloy, a magnesium alloy, an aluminum-magnesium alloy or a copper alloy, and the hardness of the second metal body 20 is smaller than the hardness of the first metal body 10, and the second metal body is used. 20 corresponds to the first surface 11 of the first metal body 10 (as shown in FIG. 4).

c) pressing the first metal body 10 and the second metal body 20 by a pressing tool 6 to plastically deform each of the convex bodies 13 such that the root width W1 of the groove 14 is larger than the groove The top width W2 of the 14 is at the same time, and the second metal body 20 is engaged with each of the protrusions 13, the grooves 14 and the recesses 131. Referring to FIGS. 4 to 5, the presser may be a crimping die or a roller set 60, wherein the roller set 60 includes an upper roller 61 and a lower portion disposed directly below the upper roller 61. The roller 62, wherein the crimping process can be performed in a cold or hot manner, and the first metal body 10 and the second metal body 20 that have completed the aforementioned splicing process are fed between the upper roller 61 and the lower roller 62 In the rolling process, since the hardness of the second metal body 20 is lower than the hardness of the first metal body 10, the respective convex bodies 13 are plastically deformed after the pressure contact by the respective rollers 61, 62, so that the grooves 14 are formed. The root width W1 is larger than the top width W2 of the groove 14, and the second metal body 20 is engaged with the convex body 13, the concave groove 14 and each of the concave grooves 131 to form a mechanically engaged rivet structure.

Referring to FIG. 5 again, the foregoing manufacturing method can produce a composite metal structure including a first metal body 10 and a second metal body 20, the first metal body 10 having a first surface 11 at the first The surface 11 is formed with a plurality of protrusions 13 and a plurality of grooves 14 formed between the protrusions 13. Each of the protrusions 13 is respectively provided with a recessed groove 131, and the groove 14 has a width at a position away from the first surface 11. W1 and a position adjacent to the first surface 11 have a top width W2, the root width W1 is greater than the top width W2; the hardness of the second metal body 20 is less than the hardness of the first metal body 10, and the second metal body 20 is crimped to the first surface 11 is formed into a mechanically engaged rivet structure with each of the protrusions 13, the grooves 14 and the recessed grooves 131 to be embedded and coupled.

Referring to FIG. 6 , the first metal body 10 of the present embodiment has a triangular guiding structure 15 formed in a cross section at an intermediate portion of each of the grooves 14 , and a guiding inclined surface is formed on each side of the guiding structure 15 . 151, the guiding slope 151 has a guiding second metal body 20 that can easily invade each of the grooves 14 to be embedded and combined, and can effectively reduce the gap of the second metal body 20 due to the plastic flow path being unsmooth during the flow. The problem can further increase the consolidation strength of the second metal body 20 and the first metal body 10.

Referring to FIG. 13 , the cross-section of the recessed groove 131 of each of the protrusions 13 may be an inverted M-shape as in the above embodiment, and the depth D3 of the recessed groove 131 is smaller than the groove. The depth D2 of 14 is such that after the second metal body 20 is pressed into the recessed groove 131, the two side walls are easily deformed by external expansion plastic deformation. Each of the rectangular protrusions 13 in FIG. 14 is provided with a through groove 132 that communicates with the recessed groove 131. This also has the same effect that the side walls are prone to external expansion plastic deformation.

Referring to FIG. 15 , the first metal body 10 can be a cylindrical shape as in the above embodiment, and a plurality of protrusions 13 are formed on the circumferential surface of the cylinder. Most of the grooves 14 in which the root width W1 of the groove 14 is greater than the top width W2 (see Fig. 5).

In addition, in the composite metal structure of the present invention, each of the protrusions 13 and the grooves 14 of the first metal body 10 may be provided on one side of the above embodiments, or may be on the first surface of the first metal body 10. Both the 11 and the second surface 12 are provided with the aforementioned convex body 13, the groove 14 and the recessed groove 131. Further, the composite metal structure of the present invention can be subjected to a plurality of rolling processes during the production process, thereby achieving a thinning effect.

In summary, the composite metal manufacturing method and structure thereof of the present invention can achieve the intended use purpose, and solve the lack of the conventional, and because of the novelty and the progressiveness, fully meet the requirements of the invention patent application, and convert the patent. If the law is filed, please check and grant the patent in this case to protect the rights of the inventor.

10‧‧‧First metal body

11‧‧‧ first surface

12‧‧‧ second surface

13‧‧‧ convex

131‧‧‧recessed trough

132‧‧‧through slot

14‧‧‧ Groove

W1‧‧‧ root width

W2‧‧‧ top width

D1‧‧ depth

D2‧‧ depth

D3‧‧ depth

15‧‧‧Guide structure

151‧‧‧ Guided slope

20‧‧‧Second metal body

60‧‧‧Roller set

61‧‧‧Upper roller

62‧‧‧ Lower roller

a~c‧‧‧step

1 is a flow chart of a manufacturing method of the present invention.

Figure 2 is a perspective view of the first metal body of the present invention.

Figure 3 is a cross-sectional view of a first metal body of the present invention.

4 is a schematic view showing the combination of the first metal body and the second metal body of the present invention by crimping.

Figure 5 is a cross-sectional view showing the first metal body and the second metal body of the present invention after crimping.

Figure 6 is a cross-sectional view showing a second embodiment of the first metal body of the present invention.

Figure 7 is a perspective view showing a third embodiment of the first metal body of the present invention.

Figure 8 is a plan view showing a fourth embodiment of the first metal body of the present invention.

Figure 9 is a plan view showing a fifth embodiment of the first metal body of the present invention.

Figure 10 is a plan view showing a sixth embodiment of the first metal body of the present invention.

Figure 11 is a plan view showing a seventh embodiment of the first metal body of the present invention.

Figure 12 is a plan view showing an eighth embodiment of the first metal body of the present invention.

Figure 13 is a cross-sectional view showing a ninth embodiment of the first metal body of the present invention.

Figure 14 is a perspective view showing a tenth embodiment of the first metal body of the present invention.

Figure 15 is a perspective view showing a second embodiment of the composite metal structure of the present invention.

10‧‧‧First metal body

12‧‧‧ second surface

13‧‧‧ convex

131‧‧‧recessed trough

14‧‧‧ Groove

W1‧‧‧ root width

W2‧‧‧ top width

20‧‧‧Second metal body

Claims (13)

A method for fabricating a composite metal, the steps comprising: a) forming a plurality of protrusions on a surface of a first metal body, forming a plurality of grooves between each of the protrusions, and forming one of each of the protrusions a recessed groove; b) stacking a second metal body on the surface of the first metal body, the hardness of the second metal body being less than the hardness of the first metal body; and c) a metal body and the second metal body are crimped to plastically deform each of the protrusions such that a width of a root of the groove is greater than a width of a top of the groove, and the second metal body and each of the protrusions are The body, each of the grooves and each of the recessed grooves are embedded and coupled. The method for producing a composite metal according to claim 1, wherein the forming method in the step a) is rolling, punching, laser or in-mold forming. The method for fabricating a composite metal according to claim 1, wherein the recessed groove in the step a) has a V-shaped cross section, and the V-shaped concave groove has a depth greater than a depth of the concave groove. The method for fabricating a composite metal according to claim 1, wherein the depressed groove in the step a) has an inverted M-shape, and the inverted M-shaped depressed groove has a depth smaller than a depth of the concave groove. A composite metal structure comprising: a first metal body having a surface formed with a plurality of protrusions and a plurality of grooves formed between the protrusions, each of the protrusions being respectively provided with a recessed groove The groove has a width at a position away from the surface and a top width at a position adjacent to the surface, the root width being greater than the top width; and a second metal body having a hardness less than a hardness of the first metal body, The second metal body is crimped onto the surface and is embedded and coupled with each of the protrusions, the grooves and the recesses. The composite metal structure of claim 5, wherein the first metal body is a flat plate or a cylinder. The composite metal structure of claim 5, wherein each of the grooves is disposed in a laterally and longitudinally intersecting manner or is intersected by a plurality of oblique grooves. The composite metal structure of claim 7, wherein each of the protrusions has a shape of a rectangle, a cross, a triangle, a hexagon or a circle. The composite metal structure according to claim 5, wherein the convex body is provided with a through groove communicating with the concave groove. The composite metal structure according to claim 5, wherein each of the protrusions has an elongated shape and is disposed in a lateral, longitudinal or oblique interval, and each of the grooves is formed between any of the protrusions. The composite metal structure of claim 5, wherein each of the protrusions is undulating and spaced apart, and each of the grooves is formed between any of the protrusions. The composite metal structure of claim 5, wherein a guiding structure is formed in the groove of the first metal body. The composite metal structure of claim 12, wherein the guiding structure has a triangular cross section, and a guiding slope is formed on each side of the guiding structure.