CN104344200A - Composite board and manufacturing method thereof - Google Patents

Abstract

A composite plate and its manufacturing method include a first plate body and a second plate body. The first plate body is made of a first material and has a first thermal conductivity coefficient, and the first plate body is provided with a first joint part; the second plate body is made of a second material and has a second thermal conductivity coefficient, and the second plate body is provided with a first joint part. Two joint parts; the first joint part and the second joint part are spliced correspondingly, and a weld bead is formed at the joint between the first joint part and the second joint part, and the first thermal conductivity coefficient is greater than the second thermal conductivity coefficient. The composite plate and its manufacturing method provided by the present invention combine plates made of two different materials, which can maintain the necessary thermal conductivity, and the way the plates are spliced does not increase the thickness at the joint, nor does it Excessive increase in material costs.

Description

Composite sheet and its manufacturing method

【Technical field】

The invention relates to the combination of dissimilar materials, in particular to a composite board combined with two boards and a manufacturing method thereof.

【Background technique】

Electronic devices are usually equipped with high-heat components, such as high-power chips or light-emitting diode modules. The above-mentioned high-heat components need good heat dissipation measures to maintain the operation of high-heat components.

Taking the LED module as an example, the LED module is usually fixed on a metal plate with high thermal conductivity, so as to conduct heat through the metal plate and dissipate the heat generated by the LED module to the outside.

The aforementioned metal plate is usually also an important structural component of an electronic device, such as a backplane of an LED backlight module. Copper is the most commonly used metal material for heat conduction. If copper (or other metals with high thermal conductivity) is used to make a large-area backplane, the material cost of the backplane will be excessively increased.

In order to solve the cost problem, the above-mentioned backboard will be made of composite board. The light-emitting diode module is arranged on a metal plate with a small area but high thermal conductivity, and the high thermal conductivity metal plate is further combined with another metal plate with lower material cost to form a complete backplane.

The above-mentioned combination of the two metal plates is usually to partially superimpose the two metal plates, and then join the materials of the overlapped parts by means of screws, riveting, and glue.

The above-mentioned joining methods, screws and riveting have the problem of additional component costs, and the assembly method is relatively complicated; and the use of adhesive bonding will cause a decrease in thermal conductivity.

In addition, the partial superposition of two metal plates will increase the local thickness. At the same time, due to the different thermal expansion coefficients of different materials, the superimposed part is prone to warpage and local unevenness, which will cause unnecessary deformation of the material and reduce the thickness of the two metal plates. Efficiency of heat transfer between plates.

【Content of invention】

In order to solve the above problems, the present invention provides a composite board and its manufacturing method, which combines two boards made of different materials, and the boards are spliced without adding additional thickness at the junction.

A composite board provided by the present invention includes a first board body and a second board body. The first board is made of a first material and has a first thermal conductivity, and the first board is provided with a first joint; the second board is made of a second material and has a second thermal conductivity, and the second board is provided with a first joint. Two joints.

The aforementioned first joint portion and the second joint portion are spliced correspondingly, and a weld bead is formed at the joint of the first joint portion and the second joint portion, and the first heat transfer coefficient is greater than the second heat transfer coefficient.

Furthermore, in at least one embodiment of the present invention, the first joint part is provided with at least one protruding part, the second joint part is provided with at least one notch part, and the protruding part and the notch part are spliced correspondingly.

Furthermore, in at least one embodiment of the present invention, the first joint part is provided with at least one notch part, the second joint part is provided with at least one protrusion part, and the recess part and the protrusion part are spliced correspondingly.

Furthermore, in at least one embodiment of the present invention, the first joint part is provided with a plurality of protrusions and a plurality of notches, and the second joint part is also provided with a plurality of recesses and a plurality of protrusions, The plurality of protrusions of the first engaging portion correspond to the plurality of notches of the second engaging portion, and the plurality of notches of the first engaging portion correspond to the plurality of protrusions of the second engaging portion.

Furthermore, in at least one embodiment of the present invention, the protrusion and the notch are wedge-shaped.

Furthermore, in at least one embodiment of the present invention, the first joint part and the second joint part are provided with stamping parts.

Furthermore, a kind of composite plate manufacturing method provided by the present invention, its manufacturing steps are:

Step 1: providing a first plate body, the first plate body is made of a first material with a first thermal conductivity, and the first plate body is provided with a first joint portion.

Step 2: providing a second plate body, the second plate body is made of a second material with a second thermal conductivity, and the second plate body is provided with a second joint portion.

Step 3: splicing the first joint part of the first plate body and the second joint part of the second plate body; and welding the first joint part and the second joint part to form a composite plate.

Step 4: Stamping the stamped part of the first plate body and/or the stamped part of the second plate body.

The composite plate and its manufacturing method proposed by the present invention can maintain the necessary heat conduction performance without excessively increasing the material cost by combining two plates made of different materials. At the same time, the bonding structure between the first plate and the second plate of the present invention adopts the form of plane embedding (in-plane), and the thickness of the joint will not increase due to overlapping of the plates, but it can still maintain an effective combination. At the same time, in the in-plane combination form, the thermal expansion will strengthen the tight fitting effect between the protruding part and the notch part, and avoid unexpected deformation caused by the difference in thermal expansion coefficient.

【Description of drawings】

Fig. 1 is an exploded view of the first embodiment of the present invention.

Fig. 2 is a perspective view of the first embodiment of the present invention.

Fig. 3 is an exploded view of the second embodiment of the present invention.

Fig. 4 is a perspective view of the second embodiment of the present invention.

Fig. 5 is an exploded view of the third embodiment of the present invention.

Fig. 6 is a perspective view of a third embodiment of the present invention.

FIG. 7 is a perspective view of a modification example of the first embodiment of the present invention.

FIG. 8 is an exploded view of a modification example of the first plate body and the second plate body in the second embodiment of the present invention.

Fig. 9 is a flow chart of the implementation steps of the manufacturing method of the composite plate of the present invention.

[Description of component symbols]

Composite sheet 10

Weld bead 10a

The first board body 100

First junction 110

First protrusion 112

First notch 114

Heat absorbing part 130

The first stamping department 140

Second plate body 200

Second junction 210

Second protrusion 212

Second notch 214

The second stamping department 240

Heat source 300

Composite sheet manufacturing steps S01, S02, S03, S04

【Detailed ways】

The present invention mainly discloses a composite plate and its manufacturing method, wherein the basic principle of welding is well known to those skilled in the relevant technical field, so the following description will not fully describe the welding process. At the same time, the diagrams compared below mainly express the structural representations related to the features of the present invention, and are not and need not be completely drawn according to the actual size, and will be explained first.

Please refer to FIG. 1 and FIG. 2 , which is a composite board 10 disclosed in the first embodiment of the present invention, including a first board body 100 and a second board body 200 . The first plate body 100 and the second plate body 200 are used to be spliced into a relatively large composite plate 10 .

Furthermore, the first plate body 100 is made of a first material with a first thermal conductivity coefficient, and the first plate body 100 is provided with a first joint portion 110; the second plate body 200 is made of a second material with a second thermal conductivity coefficient , the second plate body 200 is provided with a second joint portion 210 .

Please refer to FIG. 2, the first protrusion 112 of the first joint 110 is spliced to the second notch 214 of the second joint 210, so that the first joint 110 is in close contact with the second joint 210 to form a weld. The channel 10a (as shown in FIG. 2 ) is used for welding the first joint portion 110 and the second joint portion 210 . In the same way, the first notch portion (not represented in the figure) can also be provided with the first engaging portion 110 to be spliced to the second protruding portion (not represented in the figure) of the second engaging portion 210, so that the first engaging portion 110 closely contacts the second joint portion 210 to form a weld bead 10 a for welding the first joint portion 110 and the second joint portion 210 .

The aforementioned welding method can be welding with solder or welding without solder, and the best welding method between the first board body 100 and the second board body 200 is laser welding; The combination of the second notch portion 214 of the second joint portion 210 can extend the weld bead 10 a and provide additional close-fitting force, thereby strengthening the combination between the first plate body 100 and the second plate body 200 .

Furthermore, in a specific embodiment, the first plate body 100 is made of a first material with a first thermal conductivity and the second plate body 200 is made of a second material with a second thermal conductivity, for example, the first plate The body 100 is copper, and the second plate body 200 is aluminum, so that the first thermal conductivity is greater than the second thermal conductivity. In this way, the first board body 100 has relatively excellent heat conduction performance compared with the second board body 200, and a heat source 300 (for example, a high-power chip , light-emitting diode module, etc.), and conduct rapid heat conduction through the first board 100 , preventing the first board 100 from contacting the heat source 300 to form a high-temperature hotspot. In Fig. 1 and Fig. 2, the first plate body 100 can also include a heat absorbing portion 130, the heat absorbing portion 130 can be formed by bending one side of the first plate body 100 where the heat source 300 is installed, and the heat absorbing portion 130 can turn the heat source The heat generated at 300 is transferred to the first plate body 100 , and then diffused from the first plate body 100 to the second plate body 200 through the weld bead 10 a for heat dissipation.

In actual operation, the second board body 200 can be made of relatively low-cost materials, thereby reducing the manufacturing cost of the composite board 10 , so that the manufacturing cost of the composite board 10 can be lower than that of a board made entirely of the first board body 100 .

Please refer to FIG. 3 and FIG. 4 , which is a composite board 10 disclosed in the second embodiment of the present invention, including a first board body 100 and a second board body 200 .

In the second embodiment, the first joint part 110 is provided with a plurality of first protrusions 112, the second joint part 210 is provided with a plurality of second notches 214, and the first protrusions 112 and the second notches The positions of the parts 214 are corresponding; naturally, when the first joint part 110 is provided with a plurality of first protruding parts 112, a first notch part 114 will be formed between the first protruding parts 112. Similarly, When the second joint portion 210 is provided with a plurality of second notches 214, a plurality of second protrusions 212 will be formed between the second notches 214, and the first notches 114 and the second protrusions 214 The positions are corresponding; thereby, the first joint part 110 and the second joint part 210 can be spliced corresponding to each other, so that the first joint part 110 closely contacts the second joint part 210 to form the weld bead 10a. Through the combination of the plurality of first protrusions 112, the plurality of first notches 114, the plurality of second protrusions 212, and the plurality of second notches 214, the length of the weld bead 10a can be effectively extended, and The thermal contact resistance between the first plate body 100 and the second plate body 200 is reduced. In particular, the first protruding portion 112 extends toward the middle portion of the second plate body 200, and the second protruding portion 212 extends toward the middle portion of the first plate body 100, which can strengthen the first plate body 100 and the second plate body. The heat exchange between 120 enables the heat from the heat source to be quickly transferred from the first plate body 100 to the second plate body 200 , avoiding continuous heat concentration on the first plate body 100 .

Please refer to FIG. 5 and FIG. 6 , which are a composite board 10 disclosed in the third embodiment of the present invention, including a first board body 100 and a second board body 200 .

In the third embodiment, the first engaging portion 110 is provided with a plurality of first protrusions 112 and a plurality of first notches 114 , and the second engaging portion 210 corresponds to the first protrusions 112 and the first notches 114 A plurality of second notches 214 and a plurality of second protruding parts 212 are set at the positions, and the first protruding parts 112 and the second notches 214 and the first notches 114 and the second protruding parts 212 can correspond stitching. In this embodiment, the width of each first protruding portion 112 gradually increases with the length extending outward, and the width of the second protruding portion 212 gradually increases with the length extending outward; each first notch portion The width of 114 gradually increases with the length of the indentation, and the width of the second notch portion 214 gradually increases with the length of the indentation; specifically, each first protruding portion 112, each first notch portion 114, Each second protruding portion 212 and each second notch portion 214 form a wedge-shaped shape, which can further extend the length of the welding bead 10a and strengthen the tight-fitting bonding force. The extension of the length of the weld bead 10 a also increases the contact area between the first plate body 100 and the second plate body 200 , thereby further reducing the contact thermal resistance between the first plate body 100 and the second plate body 200 . Similarly, the multiple protrusions or multiple notches formed by the first joint 110 and the second joint 210 are not limited to wedge shapes, but may be square or trapezoidal, or even zigzag, the main purpose of which is to increase splicing The length of the rear weld bead 10 a strengthens the bonding force and heat conduction effect between the first plate body 100 and the second plate body 200 .

Please refer to FIG. 7 and FIG. 8 , in another implementation state, the first joint portion 110 of the first plate body 100 may be further provided with a first stamping portion 140 , more specifically, the first stamping portion 140 is disposed on The first protruding part 112 is used to be stamped; similarly, the second joint part 210 of the second plate body 200 may also be provided with a second stamping part 240, and the second stamping part 240 is arranged on the second protruding part 212 on, can also be used to be stamped. In a specific operation process, only the first stamping part 140 or only the second stamping part 240 may be provided, or both the first stamping part 140 and the second stamping part 240 may be provided. When the first protruding portion 112 is spliced to the second notch portion 214, and the first punching portion 140 is stamped and deformed, the edge of the first protruding portion 112 can expand outward, so that the edge of the first protruding portion 112 is more closely contact the edge of the second notch portion 214; similarly, when the second protruding portion 212 is spliced to the first notch portion 114, and the second stamping portion 240 is stamped and deformed, the edge of the second protruding portion 212 It can expand outward, so that the edge of the second protruding portion 212 is in closer contact with the edge of the first notch portion 114 , thereby enhancing the close-fit bonding force and reducing contact thermal resistance.

Please refer to Figure 9, a method for manufacturing a composite panel provided by the present invention, the steps are:

Step 1S01: providing a first plate body, the first plate body is made of a first material with a first thermal conductivity coefficient, and the first plate body is provided with a first joint portion.

Step 2S02 : providing a second plate body, the second plate body is made of a second material with a second thermal conductivity, and the second plate body is provided with a second joint portion.

Wherein the first plate body is made of a first material and has a first thermal conductivity and the second plate body is made of a second material and has a second heat conductivity coefficient, for example, the first plate body is copper and the second plate body is aluminum, Make the first thermal conductivity greater than the second thermal conductivity. In this way, the first plate body has relatively excellent heat conduction performance compared with the second plate body, and a heat source (such as a high-power chip, a light-emitting diode module, etc.) can be installed on one side of the first plate body different from the first joint portion ), and can quickly conduct heat, avoiding the formation of high-temperature hot spots where the first board contacts the heat source.

Step 3S03: splicing the first joint portion of the first plate body and the second joint portion of the second plate body; and joining the first joint portion and the second joint portion by welding to form a composite plate.

Furthermore, the first joint part can be provided with one or more first protrusions and first notches, and the second joint part can also be provided with one or more second protrusions and second notches correspondingly , each first protruding portion, each first notch portion, each second protruding portion and each second notch portion may be wedge-shaped, square or trapezoidal in shape.

Step 4S04: Stamping the stamping part of the first plate body and/or the stamping part of the second plate body; the first plate body may further be provided with a first stamping part, and the first stamping part is provided on the first protruding part, To be stamped, the second plate body may also be provided with a second stamping portion, which is arranged on the second protruding portion and is also used to be stamped.

After the first protruding part is spliced to the second notch part, when the first punching part is stamped to deform, the edge of the first protruding part can expand outward, so that the edge of the first protruding part can be more tightly Contact the edge of the second notch; similarly, when the second protrusion is spliced to the first notch, and the second stamping part is stamped to deform it, the edge of the second protrusion can expand outwards, The edge of the second protruding portion is made to more closely contact the edge of the first notch portion, thereby enhancing the close-fit bonding force and reducing contact thermal resistance.

The composite board and its manufacturing method provided by the present invention combine boards made of two different materials, which can maintain the necessary heat conduction performance without excessively increasing the material cost. At the same time, the bonding structure between the first plate and the second plate of the present invention adopts the form of plane embedding (in-plane), and the thickness of the joint will not increase due to overlapping of the plates, but it can still maintain an effective combination.

The above description is only a preferred implementation mode of the present invention, and is not intended to limit the scope of rights of the present invention; at the same time, the above description should be clear and implementable for those skilled in the relevant technical field, so others do not depart from the spirit disclosed in the present invention The equivalent changes or modifications accomplished below shall be included in the claims.

Claims (10)

1. a composite board, comprises the first plate body and the second plate body, it is characterized in that:

Described first plate body is made up of the first material has the first thermal conductivity, and described first plate body is provided with the first joining portion;

Described second plate body is made up of the second material has the second thermal conductivity, and described second plate body is provided with the second joining portion;

Described first joining portion is corresponding with described second joining portion splices, and described first joining portion and described second stitching portion, joining portion are formed with welding bead, and described first thermal conductivity is greater than described second thermal conductivity.

2. composite board according to claim 1, is characterized in that: described first joining portion is provided with at least one bump, and described second joining portion is provided with at least one notch portion, and described bump is corresponding with described notch portion to be spliced.

3. composite board according to claim 1, is characterized in that: described first joining portion is provided with at least one notch portion, and described second joining portion is provided with at least one bump, and described notch portion is corresponding with described bump splices.

4. composite board according to claim 1, it is characterized in that: described first joining portion is provided with multiple bump and multiple notch portion, described second joining portion is also provided with multiple notch portion and multiple bump, described multiple notch portion at corresponding described second joining portion of described multiple bumps at described first joining portion, multiple bumps at corresponding described second joining portion of multiple notch portion at described first joining portion.

5. the composite board according to any one of claim 2,3 or 4, is characterized in that: described bump and described notch portion are wedge shape.

6. the composite board according to any one of claim 2,3 or 4, is characterized in that: described first joining portion and described second joining portion are provided with pressing part.

7. a method for manufacturing composite boards, is characterized in that comprising the following step:

Step 1: the first plate body is provided, described first plate body is made up of the first material has the first thermal conductivity, and described first plate body has the first joining portion;

Step 2: the second plate body is provided, described second plate body is made up of the second material has the second thermal conductivity, and described second plate body has the second joining portion; Described first thermal conductivity is greater than described second thermal conductivity;

Step 3: described first joining portion and described second joining portion are spliced, and carry out in a welding manner engaging forming described composite board with described second stitching portion, joining portion at described first joining portion.

8. method for manufacturing composite boards according to claim 7, it is characterized in that: described first joining portion and described second joining portion have bump and notch portion separately respectively, the described bump at described first joining portion and described notch portion corresponding with described notch portion with the described bump at described second joining portion.

9. method for manufacturing composite boards according to claim 7, is characterized in that: described first joining portion and described second joining portion are provided with pressing part further.

10. method for manufacturing composite boards according to claim 9, is characterized in that: include step 4 further, described step 4 is for carry out punching press to described pressing part.