Laser welding method

A technology for laser welding and welding surfaces, applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., which can solve the problems of low power density, insufficient heating, and inability to reduce spatters well

Pending Publication Date: 2022-01-25
UNITED WINNERS LASER CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the reflectivity of copper to near-infrared light is as high as 95%. Therefore, the heating area around the keyhole of a dual-core fiber laser based on near-infrared li...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Laser welding method
  • Laser welding method
  • Laser welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0091] The copper material is taken as an example below to introduce the content of the present invention.

[0092] Fig. 1(a), Fig. 1(b) and Fig. 1(c) are schematic diagrams of the copper material connection method in Example 1 of the present invention.

[0093] A square copper rod 101 is used as the copper material, and the metal to be connected is a 2×3 mm square copper rod 102 with the same shape as the copper rod 101 .

[0094] Arranged butted with each other, the gap d=0.3mm.

[0095] The laser for heating the copper rod 101 and the copper rod 102 has an absorption wavelength of 45%-50% for copper.

[0096] The laser beam is 455nm, 1KW blue laser 103 .

[0097] The diameter of the blue laser spot 104 is D = 2 mm, which is irradiated near the joint 105 .

[0098]In addition, within the blue laser spot 104, high-power infrared laser beams 106, 107 having a wavelength of 1070 nm and a focal spot size of 30 μm were irradiated near the end faces of the respective copper rod...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Wavelengthaaaaaaaaaa
Wavelengthaaaaaaaaaa
Login to view more

Abstract

The invention provides a laser welding method which comprises the steps that to-be-welded first metal and to-be-welded second metal are arranged, so that the to-be-welded surface of the first metal and the to-be-welded surface of the second metal are oppositely arranged; the first metal and the second metal are irradiated with blue laser to enable the first metal and the second metal to form a liquid molten pool; two beams of infrared laser act on the liquid molten pool on the first metal and the liquid molten pool on the second metal correspondingly, so that a first welding keyhole is formed in the first metal, and a second welding keyhole is formed in the second metal; and the first welding key hole and the second welding key hole are expanded and fused. According to the laser welding method, the blue laser and two red laser beams are adopted for welding, so that the overall laser utilization rate is high, laser welding can be completed with low total power, the cold joint problem is not likely to occur, no splashing is generated in welding, the overcurrent capacity of a weld joint is guaranteed, and efficient and splashing-free welding of the first metal and the second metal is completed.

Description

【Technical field】 [0001] The invention relates to the field of laser welding, in particular to a laser welding method for copper materials and dissimilar materials containing copper materials. 【Background technique】 [0002] In recent years, as a method of reducing spatter, pores, etc. during laser welding, it has become an important research direction. Conventional near-infrared dual-core fiber lasers are more and more widely used. Dual-core fiber lasers contain high-brightness central beams And low-brightness ring beam, the center beam can quickly create a keyhole, and the ring beam can heat the area around the keyhole, so it is possible to perform hybrid welding of keyhole welding and heat conduction welding at the same time. This hybrid welding process, the area around the keyhole is also heated, so the surface tension of the keyhole opening increases, it can spread out like a bell mouth, and the metal vapor can be discharged smoothly, so it can greatly reduce spatter, e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B23K26/21
CPCB23K26/21B23K2103/18B23K2103/12
Inventor 千国达朗牛增强陈国宁卢国杰韩金龙谭浩
Owner UNITED WINNERS LASER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap