CN114698280A

CN114698280A - Connecting structure and method for connecting workpieces

Info

Publication number: CN114698280A
Application number: CN202011582150.XA
Authority: CN
Inventors: 马志刚; 王万成; 李安庭
Original assignee: Fulian Yuzhan Technology Shenzhen Co Ltd
Current assignee: Fulian Yuzhan Technology Shenzhen Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-07-01

Abstract

A connecting structure comprises a first workpiece, a second workpiece, a first welding part and a bonding part. The first welding part is arranged between the first workpiece and the second workpiece and used for connecting the first workpiece and the second workpiece. The bonding portion covers the first welding portion and is used for connecting the first workpiece and the second workpiece. The connection structure of this application appearance is pleasing to the eye and stable in structure. The present application further provides a method of joining workpieces.

Description

Connecting structure and method for connecting workpieces

Technical Field

The present application relates to a joining structure and a method of joining workpieces.

Background

At present, the middle plate and the middle frame of the electronic product are mostly connected by direct welding. However, there are problems with this operation: (1) when the middle plate and the middle frame are welded, the welding spot density is high, and the operation cost is greatly increased; (2) if the melting point of the middle plate and/or the middle frame is low, after the middle plate and the middle frame are welded, a melting groove is left on the surface of the middle plate and/or the middle frame, and the appearance is affected.

Disclosure of Invention

In view of the above, it is desirable to provide a connection structure with stable structure and beautiful appearance.

The present application further provides a method of joining workpieces.

A connecting structure comprises a first workpiece, a second workpiece, a first welding part and a bonding part. The first welding part is arranged between the first workpiece and the second workpiece and used for connecting the first workpiece and the second workpiece. The bonding portion covers the first welding portion and is used for connecting the first workpiece and the second workpiece.

In some embodiments, the first workpiece comprises a first connection; the second workpiece comprises a second connecting portion connected with the first connecting portion through the first welding portion.

In some embodiments, the second workpiece is provided with a connecting groove, the second connecting portion is arranged in the connecting groove and used for accommodating the first connecting portion; the first welding part is arranged in the connecting groove and used for connecting the first connecting part and the second connecting part.

In some embodiments, a portion surrounding the connecting groove and extending towards the inside of the first workpiece and the second workpiece is provided with at least one hole; the connecting structure further comprises a reinforcing part, wherein the reinforcing part is connected with the bonding part and is used for filling the at least one hole.

In some embodiments, the connecting groove further comprises a first side surface and a second side surface, the first side surface connecting the second connecting portion; the second side surface is connected with the first side surface and the second connecting part, and a groove is arranged in a cross connection area of the second side surface and the first side surface; the bonding part is also filled in the groove.

In some embodiments, the angle between the first side surface and the second connecting portion is a, and a ranges from 60 ° to 80 °.

In some embodiments, the connecting structure further comprises a second weld disposed between the first and second workpieces and spaced apart from the first weld for connecting the first and second workpieces; the bonding portion is further used for covering the second welding portion.

In some embodiments, the connecting structure further comprises a component disposed within the first workpiece; the first welding part is further used for forming a heat dissipation channel, and the heat dissipation channel is used for transferring heat generated by the component.

In some embodiments, the joining structure further includes a heat absorbing portion provided on the first work and joining the first weld portion.

In some embodiments, the material of the second workpiece is at least one of aluminum, stainless steel, and titanium.

In some embodiments, the second workpiece includes a first section and a second section, the second section connecting the first section and being located between the first section and the first workpiece; the connecting groove is arranged in the second subsection.

A method of joining workpieces for joining a first workpiece and a second workpiece, the first workpiece including a first joint and the second workpiece including a second joint, the method of joining workpieces comprising: laser welding the first connecting part and the second connecting part to form a first welding part, wherein the first welding part is used for connecting the first workpiece and the second workpiece; and forming an adhesive part covering the first welding part and used for connecting the first workpiece and the second workpiece.

In some embodiments, the laser welding the first connection portion and the second connection portion is pulse laser welding, and the processing focal distance is +1.0mm to +2.0 mm.

In some embodiments, the method of joining workpieces further comprises: forming at least one hole in the first and second work pieces; and forming a reinforcing part which is connected with the bonding part and is used for filling the at least one hole.

In some embodiments, the method of joining workpieces further comprises: a connecting groove is formed in the second workpiece, the second connecting part is arranged on the connecting groove, and the first connecting part is accommodated in the connecting groove; wherein the step of laser welding the first connection portion and the second connection portion further comprises: forming the first welding part in the connecting groove; wherein the step of forming the bonding portion further comprises: the bonding portion also fills the connecting groove.

In some embodiments, the connecting groove further comprises a first side surface and a second side surface connecting the second connecting portion, the first side surface connecting the second side surface; the method of joining workpieces further comprises: forming a groove in a connection area of the first side surface and the second side surface; wherein the step of forming the bonding portion further comprises: the bonding part is also filled in the groove.

In some embodiments, the method of joining workpieces further comprises: and forming a heat absorbing part on the first workpiece, wherein the heat absorbing part is connected with the first welding part.

In this application, connection structure with the help of first weld part with the synergism of bonding portion has realized right first work piece with connection between the second work piece, so improved greatly first work piece with cohesion between the second work piece has effectively promoted connection structure's structural stability. In addition, the first welding part is covered by the bonding part, so that the appearance of the connecting structure is effectively improved.

Drawings

Fig. 1 is a schematic structural view of a connection structure according to some embodiments of the present application.

Fig. 2 is a schematic structural view of the connection structure shown in fig. 1 from another view angle.

FIG. 3 is a schematic illustration of a portion of the structure of a first workpiece and a second workpiece according to some embodiments of the present application.

FIG. 4 is a schematic illustration of a portion of a second workpiece according to some embodiments of the present disclosure.

FIG. 5 is a schematic view of a portion of a first workpiece according to some embodiments of the present disclosure.

FIG. 6 is a schematic partial cross-sectional view of a first workpiece, a bond, and a second workpiece according to some embodiments of the present application.

Fig. 7 is a schematic partial cross-sectional view taken along line VII-VII shown in fig. 1.

FIG. 8 is a flow chart of a method of joining workpieces according to some embodiments of the present application.

Description of the main elements

Connection structure 10

First workpiece 11

First connection portion 111

First workpiece body 112

Accommodating groove 1121

The joint part 113

Second workpiece 12

First subsection 12a

Second section 12b

Second connection part 121

Connecting groove 122

First side 1221

Second side 1222

First gap 123

Second gap 124

Groove 125

Projection 126

Third gap 127

Insulation region 128

First welding part 13

Heat dissipation channel 131

Adhesive part 14

Reinforcing part 141

Step groove 15

Hole 16

Second welded part 17

Component 18

Heat absorption part 19

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 and 2, some embodiments of the present application provide a connecting structure 10 including a first workpiece 11, a second workpiece 12, a first welding portion 13, and an adhesive portion 14. The first welding portion 13 is disposed between the first workpiece 11 and the second workpiece 12 for connecting the first workpiece 11 and the second workpiece 12. The bonding portion 14 covers the first welding portion 13 and is used for connecting the first workpiece 11 and the second workpiece 12.

The connection structure 10 is not limited to be applied to a mobile phone, a tablet computer, a wearable electronic device, and the like.

In the present application, the connection structure 10 achieves connection between the first workpiece 11 and the second workpiece 12 by the cooperation of the first welding portion 13 and the bonding portion 14, so that the bonding force between the first workpiece 11 and the second workpiece 12 is greatly improved, and the structural stability of the connection structure 10 is effectively improved. In addition, the first welding portion 13 is covered by the bonding portion 14, which effectively improves the aesthetic property of the connecting structure 10.

The material of the first workpiece 11 is not limited to aluminum. The material of the second workpiece 12 is not limited to at least one of aluminum, stainless steel, and titanium.

Referring to fig. 1, 3 and 4, the first workpiece 11 includes a first connection portion 111. The second workpiece 12 includes a second connection portion 121. The second connecting portion 121 is connected to the first connecting portion 111 by the first welding portion 13.

In some embodiments, referring to fig. 5, the first workpiece 11 further includes a first workpiece body 112. The first connecting portion 111 is protruded from the edge of the first workpiece body 112.

In the present embodiment, referring to fig. 5, the first workpiece body 112 has a rectangular plate shape. It is understood that in other embodiments, the shape of the first workpiece body 112 can be adjusted according to actual needs, and can be a regular shape such as a circle, a diamond, or other irregular shapes.

In other embodiments, referring to fig. 5, the first workpiece 11 further includes a joint 113. The engaging portion 113 is connected between the first connecting portion 111 and the first workpiece body 112.

In further embodiments, referring to fig. 1 and 5, there is a difference in thickness between the engagement portion 113 and the first connection portion 111. The engaging portion 113 has a thickness greater than that of the first connecting portion 111. In this way, the engagement portion 113 and the first connection portion 111 together form a stepped structure. That is, the engagement portion 113 and the first connection portion 111 together form the stepped groove 15. The adhesive portion 14 covering the first welding portion 13 is also located in the stepped groove 15.

It can be understood that, referring to fig. 1 and 5, the step groove 15 provides a receiving space for the adhesive portion 14 covering the first welding portion 13, so as to effectively prevent the adhesive portion 14 covering the first welding portion 13 from protruding relative to each workpiece (e.g., the first workpiece 11 and/or the second workpiece 12) and affecting the aesthetic property of the connecting structure 10. In addition, the step groove 15 can increase the bonding area of the bonding part 14 and the first workpiece 11, thereby effectively improving the bonding strength between the first workpiece 11 and the second workpiece 12.

In some embodiments, the first workpiece 11 is not limited to being made by integral molding.

Referring to fig. 1, 3 and 4, the second workpiece 12 is provided with a connecting slot 122 for receiving the first connecting portion 111. The second connecting portion 121 is disposed in the connecting groove 122. The first welding portion 13 is disposed in the connecting groove 122 for connecting the first connecting portion 111 and the second connecting portion 121.

In some embodiments, referring to fig. 6, the portion of the first and

second work pieces

11 and 12 extending inwardly around the face of the connecting slot 122 is provided with at least one aperture 16. The connecting structure 10 further includes a reinforcement portion 141. The reinforcement portion 141 is connected to the bonding portion 14 for filling the at least one hole 16. In this way, the combination force between the first workpiece 11 and the second workpiece 12 is further improved by the cooperation of the reinforcement portion 141 and the hole 16.

It is understood that in other embodiments, the aperture 16 and the reinforcement 141 may be omitted.

Referring to fig. 4, the connecting slot 122 includes a first side 1221 and a second side 1222. The first side surface 1221 is connected to the second connection portion 121. The second side 1222 connects the first side 1221 and the second connecting portion 121.

In some embodiments, referring to fig. 1 and 3, the first connecting portion 111 is spaced apart from the second side 1222 toward a side of the second side 1222 to form a first gap 123. The first connecting portion 111 is spaced from the first side surface 1221 toward a side of the first side surface 1221 to form a second gap 124. The first gap 123 and the second gap 124 communicate. The bonding portion 14 is also filled in the first gap 123 and the second gap 124 to further enhance the bonding strength between the first workpiece 11 and the second workpiece 12.

In some embodiments, referring to fig. 1 and to fig. 3, the intersection region of the second side 1222 and the first side 1221 is provided with a groove 125. The bonding portion 14 is also filled in the groove 125. Wherein the groove 125, the first gap 123 and the second gap 124 communicate with each other.

It can be understood that, by virtue of the structural design of the groove 125, the bonding portion 14 is further filled in the groove 125, so that the connection between the bonding portion 14 and the second workpiece 12 is enhanced, and the bonding strength between the first workpiece 11 and the second workpiece 12 is effectively improved.

In other embodiments, at least one of the first gap 123, the second gap 124 and the groove 125 can be omitted according to actual requirements.

In some embodiments, referring to fig. 4, the included angle between the first side surface 1221 and the second connection portion 121 is a. a ranges from 60 to 80.

In some embodiments, referring to fig. 3, the second work piece 12 also includes a projection 126 disposed on the second side 1222. The protrusion 126 protrudes from the second side 1222 toward the first workpiece 11 and protrudes relative to the second workpiece 12. Wherein, a part of the side surface of the protruding portion 126 can be used as the first side surface 1221 of the connecting groove 122.

In the present embodiment, referring to fig. 1 and 3, the side of the protruding portion 126 facing the first workpiece 11 is spaced apart from the side of the first workpiece 11 facing the protruding portion 126 to form a third gap 127. The third gap 127 communicates with the first gap 123 and the second gap 124. The bonding portion 14 further fills the third gap 127 to further enhance the bonding strength between the first workpiece 11 and the second workpiece 12.

It is understood that in other embodiments, the third gap 127 may be omitted as appropriate. Then, when the third gap 127 is not present, the projection 126 and the first workpiece 11 are not limited to being joined by welding, snapping, or the like.

In some embodiments, referring to fig. 1, the connection structure 10 further includes a second weld 17. The second welding portion 17 is disposed between the first workpiece 11 and the second workpiece 12, and is spaced apart from the first welding portion 13 for connecting the first workpiece 11 and the second workpiece 12. The adhesive portion 14 further covers the second welding portion 17.

In the present application, by means of the arrangement of the bonding portion 14, the connection strength between the first workpiece 11 and the second workpiece 12 is ensured, and the first welding portion 13 and the second welding portion 17 are arranged at intervals, so as to reduce the welding point density and reduce the operation cost of the connection structure 10.

Accordingly, it can be understood that the second workpiece 12 is also provided with a connecting groove 122 for receiving the second welding portion 17. The connection relationship between the second welding portion 17 and each of the first workpiece 11 and the second workpiece 12 is the same as or similar to that of the first welding portion 13, and is not described herein again.

In some embodiments, referring to fig. 2, the connection structure 10 further includes a component 18. The component 18 is arranged in the first workpiece 11.

The component 18 is not limited to a battery, a chip, or the like.

In some embodiments, referring to fig. 2, the first workpiece body 112 has a receiving groove 1121 formed therein. The accommodation groove 1121 is used to accommodate the component 18. It is understood that the number and shape of the accommodating slots 1121 are not limited, and can be adjusted adaptively according to the number and shape of the components 18. The number of the receiving slots 1121 may be one, two, three, four, etc. The shape of the receiving groove 1121 may be regular, such as rectangular, circular, or other irregular shapes.

In a further embodiment, referring to fig. 1 and 2, the first weld 13 also serves to form a heat dissipation channel 131. The heat dissipation channel 131 is used for transferring heat generated by the component 18.

It can be understood that, referring to fig. 1, fig. 2 and fig. 5, the heat generated by the component 18 is transferred from the first workpiece body 112 to the first soldering portion 13 connected to the first workpiece body 112 and the second workpiece 12 connected to the first soldering portion 13 in sequence, so that the heat generated by the component 18 is conducted out of the connecting structure 10, thereby achieving the heat dissipation of the component 18. Wherein, the heat dissipation channel 131 is formed by a transmission path of the heat generated by the component 18.

In addition, referring to fig. 2 and 3, since the adhesive portion 14 is filled between the third gaps 127, and the heat generated by the component 18 cannot be transmitted to the second workpiece 12 through the adhesive portion 14 due to the heat insulation property of the adhesive portion 14, the region of the first workpiece 11 and the region of the second workpiece 12 corresponding to the third gaps 127 filled with the adhesive portion 14 constitute a heat insulation region 128. Therefore, the heat insulation area 128 can be used as a space for accommodating the heat-labile components 18, so as to avoid the damage of the heat-labile components 18 due to high temperature.

In some embodiments, referring to fig. 1 and 2, the connection structure 10 further includes a heat sink portion 19. The heat absorbing portion 19 is disposed on the first workpiece 11 and connected to the first welding portion 13. The heat sink 19 is not limited to a heat conducting grid.

In some embodiments, referring to fig. 1, 2 and 5, the heat absorbing portion 19 is disposed at the connecting portion 113 and connected to the first welding portion 13. In this way, by the arrangement of the heat sink 19, the heat generated by the component 18 can be directionally transferred to the second workpiece 12 to assist the component 18 in dissipating heat better.

In some embodiments, referring to fig. 7, the second workpiece 12 includes a first section 12a and the second section 12 b. The second section 12b is connected to the first section 12a and is located between the first section 12a and the first workpiece 11. Wherein the connecting slot 122 is disposed in the second section 12 b.

In some embodiments, the first section 12a is an outer layer of the second workpiece 12 and is made of a material selected to be a relatively hard stainless steel or titanium, and the second section 12b is an inner layer of the second workpiece 12 and is made of a relatively light weight aluminum, thereby reducing the overall weight of the joint structure 10 and ensuring the hardness and wear resistance of the outer surface of the joint structure 10.

Referring to fig. 8, some embodiments of the present application also provide a method of joining workpieces for joining a first workpiece 11 and a second workpiece 12. The first workpiece 11 includes a first joint portion 111, and the second workpiece 12 includes a second joint portion 121 (see fig. 3 to 4). Referring to fig. 8, the method of joining workpieces includes:

step S1: referring to fig. 1, 3 and 4, the first connection portion 111 and the second connection portion 121 are laser welded to form a first welding portion 13. Wherein the first welding part 13 is used for connecting the first workpiece 11 and the second workpiece 12.

In some embodiments, the laser welding of the first connection portion 111 and the second connection portion 121 is pulse laser welding. Wherein, the power of laser welding the first connection part 111 and the second connection part 121 is 1380W, the welding speed is 50mm/s, the jump speed is 100mm/s, the welding delay is 90us, the jump delay is 100us, the on laser delay is-100 um, the off laser delay is 40us, and the processing focal length is +1.0 mm- +2.0 mm.

Step S2: referring to fig. 1, an adhesive portion 14 is formed, and the adhesive portion 14 covers the first welding portion 13 to connect the first workpiece 11 and the second workpiece 12.

In the present embodiment, referring to fig. 5, the first workpiece body 112 has a rectangular plate shape. It is understood that in other embodiments, the shape of the first workpiece body 112 can be adapted according to actual needs, and can be a regular shape such as a circle, a diamond, or other irregular shapes.

In some embodiments, before step S2, the method of joining workpieces further comprises:

step S3: referring to fig. 6, at least one hole 16 is formed in the first work piece 11 and the second work piece 12.

Before step S2, the method for joining workpieces further includes:

step S4: referring to fig. 6, a reinforcement portion 141 is formed, and the reinforcement portion 141 is connected to the bonding portion 14 and is used to fill the at least one hole 16.

In some embodiments, the hole 16 may be formed in the first workpiece 11 and the second workpiece 12, and then the bonding portion 14 is used to fill the hole, so that the reinforcement portion 141 is a part of the bonding portion 14.

In this way, the combination force between the first workpiece 11 and the second workpiece 12 is further improved by the cooperation of the reinforcement portion 141 and the hole 16.

It is understood that in other embodiments, steps S3 and S4 may be omitted as actually required.

step S5: referring to fig. 1, 3 and 4, the second workpiece 12 is provided with a connecting slot 122. The connecting groove 122 is provided with the second connecting portion 121, and the first connecting portion 111 is accommodated in the connecting groove 122.

Wherein, step S1 further includes: the first welding portion 13 is formed in the connecting groove 122.

Step S2, further including: the bonding portion 14 also fills the connecting groove 122.

In some embodiments, the included angle between the first side surface 1221 and the second connection portion 121 is a. a ranges from 60 to 80.

In other embodiments, at least one of the first gap 123 and the second gap 124 may be omitted according to actual requirements.

In some embodiments, after step S5, the method for joining workpieces further comprises:

step S6: referring to fig. 1 and fig. 3, a groove 125 is formed in the intersection area of the first side surface 1221 and the second side surface 1222.

Wherein, step S2 further includes: the bonding portion 14 is also filled in the groove 125.

In other embodiments, the groove 125 can be omitted according to actual requirements.

In some embodiments, referring to fig. 1, the connection structure 10 further includes a second weld 17. The second welding portion 17 is disposed between the first workpiece 11 and the second workpiece 12, and is spaced apart from the first welding portion 13 for connecting the first workpiece 11 and the second workpiece 12. Wherein the bonding portion 14 further covers the second welding portion 17.

The component 18 is not limited to a battery, a chip, or the like.

In some embodiments, referring to fig. 2, the first workpiece body 112 has a receiving groove 1121 formed therein. The accommodation groove 1121 is used to accommodate the component 18. It is understood that the number and shape of the receiving slots 1121 are not limited, and can be adjusted according to the number and shape of the components 18. The number of the receiving slots 1121 may be one, two, three, four, etc. The shape of the receiving slot 1121 may be regular, such as rectangular, circular, or other irregular shapes.

It can be understood that, referring to fig. 1, fig. 2 and fig. 5, the heat generated by the component 18 is transferred from the first workpiece body 112 to the first welding portion 13 connected to the first workpiece body 112 and the second workpiece 12 connected to the first welding portion 13 in sequence, so that the heat generated by the component 18 is conducted out of the connecting structure 10 to dissipate the heat of the component 18. Wherein, the heat dissipation channel 131 is formed by a transmission path of the heat generated by the component 18.

In some embodiments, before step S1, the method for joining workpieces further includes:

step S7: referring to fig. 1 and 2, a heat sink 19 is formed on the first workpiece 11. The heat absorbing portion 19 is connected to the first soldering portion 13.

The heat sink 19 is not limited to a heat conducting grid.

In other embodiments, step S7 may be placed after any step of S1-S6, which is not limited herein.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A connecting structure comprising:

a first workpiece and a second workpiece;

the first welding part is arranged between the first workpiece and the second workpiece and is used for connecting the first workpiece and the second workpiece; and

and an adhesive part covering the first welding part and used for connecting the first workpiece and the second workpiece.

2. The connection structure according to claim 1, wherein

The first workpiece comprises a first connection;

the second workpiece comprises a second connecting portion connected with the first connecting portion through the first welding portion.

3. The connecting structure according to claim 2, wherein the second workpiece is provided with:

the second connecting part is arranged in the connecting groove and is used for accommodating the first connecting part;

the first welding part is arranged in the connecting groove and used for connecting the first connecting part and the second connecting part.

4. The connecting structure of claim 3, wherein a portion surrounding the connecting groove and extending toward the inside of the first and second workpieces is provided with at least one hole; the connection structure further includes:

a reinforcing portion connected to the bonding portion for filling the at least one hole.

5. The coupling structure of claim 3, wherein the coupling groove further comprises:

a first side surface connected to the second connection portion;

the second side surface is connected with the first side surface and the second connecting part, and a groove is arranged in a cross connection area of the second side surface and the first side surface;

the bonding part is also filled in the groove.

6. The coupling structure of claim 5, wherein an angle between the first side surface and the second coupling portion is a ranging from 60 ° to 80 °.

7. The connection structure of any one of claims 1 to 3, further comprising:

the second welding part is arranged between the first workpiece and the second workpiece, is arranged at an interval with the first welding part, and is used for connecting the first workpiece and the second workpiece;

the adhesive portion is further configured to cover the second welding portion.

8. The connection structure of any one of claims 1 to 3, further comprising:

the component is arranged in the first workpiece;

the first welding part is further used for forming a heat dissipation channel, and the heat dissipation channel is used for transferring heat generated by the component.

9. The connecting structure according to claim 1, further comprising:

and the heat absorption part is arranged on the first workpiece and connected with the first welding part.

10. The connecting structure according to any one of claims 1 to 3, wherein the material of the second workpiece is at least one of aluminum, stainless steel, and titanium.

11. The connecting structure according to claim 3, wherein the second workpiece includes:

a first section;

a second section connected to the first section and located between the first section and the first workpiece;

the connecting groove is arranged in the second subsection.

12. A method of joining workpieces for joining a first workpiece and a second workpiece, the first workpiece including a first joint and the second workpiece including a second joint, the method of joining workpieces comprising:

laser welding the first connecting part and the second connecting part to form a first welding part, wherein the first welding part is used for connecting the first workpiece and the second workpiece; and

and forming an adhesive part which covers the first welding part and is used for connecting the first workpiece and the second workpiece.

13. The method of joining workpieces according to claim 12, wherein the first joining portion and the second joining portion are laser-welded by pulse laser welding with a machining focal length of +1.0mm to +2.0 mm.

14. The method of joining workpieces of claim 12 or 13, wherein the method of joining workpieces further comprises:

forming at least one hole in the first and second work pieces;

forming a reinforcing part which is connected with the bonding part and is used for filling the at least one hole.

15. The method of joining workpieces of claim 12 or 13, further comprising:

a connecting groove is formed in the second workpiece, the second connecting part is arranged on the connecting groove, and the first connecting part is accommodated in the connecting groove;

wherein the step of laser welding the first connection portion and the second connection portion further comprises: forming the first welding part in the connecting groove;

wherein the step of forming the bonding portion further comprises: the bonding portion also fills the connecting groove.

16. The method of joining workpieces of claim 15 wherein said connecting trough further comprises a first side and a second side connecting said second connecting portion, said first side connecting said second side; the method of joining workpieces further comprises:

forming a groove in a connection area of the first side surface and the second side surface;

wherein the step of forming the bonding portion further comprises: the bonding part is also filled in the groove.

17. The method of joining workpieces of claim 12 or 13, further comprising:

and forming a heat absorbing part on the first workpiece, wherein the heat absorbing part is connected with the first welding part.

18. The method of joining workpieces according to claim 12 or 13, wherein the material of the second workpiece is at least one of aluminum, stainless steel, titanium.