CN108247205B

CN108247205B - Laser riveting method

Info

Publication number: CN108247205B
Application number: CN201611231994.3A
Authority: CN
Inventors: 刘印峰; 翁茂静; 张海林
Original assignee: Shenzhen Yuzhan Precision Technology Co ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Shenzhen Yuzhan Precision Technology Co ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2016-12-28
Filing date: 2016-12-28
Publication date: 2020-02-07
Anticipated expiration: 2036-12-28
Also published as: CN108247205A

Abstract

The invention provides a laser riveting method, which comprises the following steps: processing a first hole on a first metal piece; fixing a second metal piece on the surface of the first metal piece with the first hole; and carrying out laser welding on the position of the second metal piece corresponding to the first hole, so that part of the second metal piece is melted and fills the first hole, and the first metal piece and the second metal piece are riveted. The first metal piece and the second metal piece riveted by the laser riveting method have higher riveting force, the depth of a molten pool is convenient to control, and the molten pool is more complete.

Description

Laser riveting method

Technical Field

The invention relates to the field of laser welding, in particular to a laser riveting method capable of riveting two metal parts.

Background

Consumer electronics typically require laser welding of two or more metals, for example, the antenna dome of a cell phone needs to be welded to the antenna. The existing laser welding method generally uses laser to directly heat and melt two metals to connect the two metals. However, the welding method easily causes obvious cracks of the molten pool on the metal surface, the depth of the molten pool in the welding method cannot be accurately controlled, the tensile resistance between the two metals fluctuates in a larger range, and the riveting force between the metals is difficult to meet the requirement.

Disclosure of Invention

In view of the above, it is necessary to provide a laser riveting method to solve the above problems.

A laser riveting method comprising: processing a first hole on a first metal piece, wherein the first hole is inverted-V-shaped and comprises a first inclined hole and a second inclined hole which are obliquely arranged with the surface of the first metal piece, and the first inclined hole and the second inclined hole are symmetrically arranged relative to a vertical axis of the surface and intersect with the surface of the first metal piece; fixing a second metal piece on the surface of the first metal piece with the first hole; and laser welding the position of the second metal piece corresponding to the first hole on one side of the second metal piece, which is far away from the first metal piece, so that part of the second metal piece is melted and fills the first hole, and the first metal piece and the second metal piece are riveted.

According to the laser riveting method, the first hole is machined in the first metal piece, then the position, corresponding to the first hole, of the second metal piece is subjected to laser welding, the first hole is filled with the molten part of the second metal piece, and a riveting structure is formed, so that the riveting force between the first metal piece and the second metal piece is high, the depth of a molten pool is convenient to control, and the molten pool is complete.

Drawings

Fig. 1 is a flowchart of a laser riveting method in a first embodiment of the present invention.

Fig. 2A to 2C are schematic views of a laser riveting process in the first embodiment.

Fig. 3A to 3C are schematic views illustrating a laser riveting process according to a second embodiment.

Fig. 4 is a schematic view of a step in a laser riveting method in a third embodiment.

Description of the main elements

First metal part	110,210,310
		Surface of	101,201
First hole	111,211,311
		First inclined hole	212
Second inclined hole	213
		Second metal piece	120,220,320
Second hole	321

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.

It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The laser riveting method provided by the invention is used for riveting two or more metal pieces. Referring to fig. 1 and fig. 2A to 2C, a laser riveting method according to a first embodiment of the invention includes the following steps:

s101: a first hole 111 is formed in a first metal member 110.

First, a first metal part 110 is provided, and at least one first hole 111 is formed on a surface 101 of the first metal part 110. The method of machining the first hole 111 includes at least one of laser machining, mechanical stamping, and mechanical drilling. As shown in fig. 2A, in the present embodiment, the number of the first holes 111 is multiple, each first hole 111 is a straight blind hole, and the extending direction of the first hole 111 is perpendicular to the surface 101 of the first metal member 110. In other embodiments, the first hole 111 may also be a through hole. The plurality of first holes 111 may be arranged in a circle or in an array on the surface 101 of the first metal member 110. It is understood that the plurality of first holes 111 may be arranged in any other shape.

S102: a second metal piece 120 is fixed on the surface 101 of the first metal piece 110 having the first hole 111.

As shown in fig. 2B, the second metal member 120 is fixed and pressed on the surface 101 of the first metal member 110 having the first hole 111. The second metal element 120 and the first metal element 110 may be made of the same material or different materials, and the shapes of the first metal element 110 and the second metal element 120 may be set according to actual requirements.

S103: and performing laser welding on the position of the second metal piece 120 corresponding to the first hole 111, so that part of the second metal piece 120 is melted and fills the first hole 111, and riveting the first metal piece 110 and the second metal piece 120.

Referring to fig. 2B and 2C, laser welding is performed on a side of the second metal part 120 away from the first metal part 110 and corresponding to the first hole 111. And heating and melting part of the second metal piece 120 at the laser processing position under the action of the laser and filling the part into the first hole 111 of the first metal piece 110 to form a riveting structure. After the welding is completed, the first metal part 110 and the second metal part 120 are riveted together, and a strong riveting force is formed between the first metal part and the second metal part. In the laser riveting method, the structure of the welding spot position is complete, the molten pool of the welding spot is complete and has no crack, the structure is clear, and the depth of the molten pool of the welding spot is stable.

It is understood that the heat generated by the laser is also diffused at the periphery of the first hole 111, and the heat applied to the first hole 111 is gradually increased to effectively increase the depth of the molten pool of the laser welding.

Referring to fig. 3A to 3C, a laser riveting method according to a second embodiment of the invention is similar to the first embodiment, and the difference is: in step S101, at least one first hole 211 is processed on the first metal component 210, where the first hole 211 is substantially inverted V-shaped and includes a first oblique hole 212 and a second oblique hole 213 intersecting with each other, and both the first oblique hole 212 and the second oblique hole 213 are disposed obliquely to the surface 201 of the first metal component 210 and symmetrically distributed on both sides of the vertical axis N of the surface 201.

When the first hole 211 is processed, first laser processing is performed on a predetermined position of the first metal part 210, and an incident angle of the first laser processing deviates from a vertical axis N of the first metal part 210 by a certain angle, so as to form a first inclined hole 212 inclined from the surface 201 of the first metal part 210. Then, the predetermined position is subjected to a second laser processing, an incident angle of the second laser processing and an incident angle of the first laser processing are symmetrical with respect to the vertical axis N to form a second inclined hole 213 obliquely arranged with respect to the surface 201 of the first metal member 210, and the first inclined hole 212 and the second inclined hole 213 intersect on the surface 201 of the first metal member 210 to form a first hole 211.

Next, the second metal piece 220 is fixed on the surface 201 of the first metal piece 210 having the first hole 211. Then, laser welding is performed on the position of the second metal piece 220 corresponding to the first hole 211, so that part of the second metal piece 220 is melted and fills the first hole 211, and the first metal piece 210 and the second metal piece 220 are riveted.

In the second embodiment, since each of the first holes 211 includes the first oblique hole 212 and the second oblique hole 213, the melted second metal part 220 will fill the first oblique hole 212 and the second oblique hole 213, respectively, thereby further increasing the riveting force between the first metal part 210 and the second metal part 220.

Referring to fig. 4, a laser riveting method according to a third embodiment of the invention is similar to the first embodiment, and has the following differences: before laser welding the second metal piece 320, at least one second hole 321 is machined on the surface of the second metal piece 320 away from the first metal piece 310. In the present embodiment, the number of the second holes 321 is plural, and each of the second holes 321 is a through hole and corresponds to the position of the first hole 311. It is understood that in other embodiments, the second hole 321 may also be a blind hole, and the second hole 321 may also not correspond to the position of the first hole 311.

In the third embodiment, since at least one second hole 321 is processed in the surface of the second metal member 320, the method can further reduce the energy required for laser welding and reduce the peak value of the laser compared to the laser caulking method of the first embodiment. The method effectively increases the depth of a weld pool of the laser welding and improves the riveting force between the first metal part 310 and the second metal part 320.

It is understood that in other embodiments, the shape, number and position of the first holes 111 may be set according to the actual requirements of riveting.

In addition, other modifications within the spirit of the invention will occur to those skilled in the art, and it is understood that such modifications are included within the scope of the invention as claimed.

Claims

1. A laser riveting method, comprising:

processing a first hole on a first metal piece, wherein the first hole is inverted-V-shaped and comprises a first inclined hole and a second inclined hole which are obliquely arranged with the surface of the first metal piece, and the first inclined hole and the second inclined hole are symmetrically arranged relative to a vertical axis of the surface and intersect with the surface of the first metal piece;

fixing a second metal piece on the surface of the first metal piece with the first hole;

and laser welding the position of the second metal piece corresponding to the first hole on one side of the second metal piece, which is far away from the first metal piece, so that part of the second metal piece is melted and fills the first hole, and the first metal piece and the second metal piece are riveted.

2. A laser riveting method according to claim 1, wherein: the processing method of the first hole includes at least one of laser processing, mechanical punching and mechanical drilling.

3. A laser riveting method according to claim 1, wherein: the first hole is perpendicular to the surface of the first metal piece.

4. A laser riveting method according to claim 1, wherein: the first hole is a blind hole or a through hole.

5. A laser riveting method according to claim 1, wherein: the number of the first holes is multiple, and the first holes are arranged in a circle.

6. A laser riveting method according to claim 1, wherein: the step of machining the first hole specifically comprises:

firstly, carrying out first laser processing on a preset position of the first metal piece, wherein the incident angle of the first laser processing deviates a certain angle from the vertical axis of the first metal piece so as to form a first inclined hole;

and carrying out second laser processing on the preset position, wherein the incident angle of the second laser processing is symmetrical to the incident angle of the first laser processing relative to the vertical axis to form a second inclined hole, and the second inclined hole is communicated with the first inclined hole to form the first hole.

7. A laser riveting method according to claim 1, wherein: before the laser welding is carried out on the second metal part, a second hole is machined in the second metal part, and the position of the second hole corresponds to that of the first hole.

8. The laser riveting method according to claim 7, wherein: the second hole is a through hole or a blind hole.