Laser welding incident angle real-time regulating and controlling system based on temperature feedback and welding method

A laser welding and temperature feedback technology, used in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of burn-through and low melting point, and achieve the effect of increasing the incident distance and preventing the phenomenon of burn-through.

Active Publication Date: 2019-03-12
JIANGSU UNIV OF SCI & TECH
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The invention is mainly aimed at some specific structures. Due to the different thickness of the board, the thermal conductivity characteristics are also different in different positions. At the same time, the melting point of the material is relatively low, and the board is relatively thin. Some alloys that are particularly sensitive to laser heat input, such as Aluminum alloys and magnesium alloys are prone to burn-

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 incident angle real-time regulating and controlling system based on temperature feedback and welding method
  • Laser welding incident angle real-time regulating and controlling system based on temperature feedback and welding method
  • Laser welding incident angle real-time regulating and controlling system based on temperature feedback and welding method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0046] Example 1

[0047] The invention performs fiber laser welding on the die-cast aluminum alloy heater cover plate structure of the new energy automobile battery. The thickness of the aluminum alloy heater cover plate is 3mm, and the welding is carried out by butt joint. Argon gas is used as shielding gas for welding. The gas flow is set to 15L / min, the defocus is -2mm, the laser power is set to 2300W, and the welding speed is Set the initial laser welding incident angle to 8°. According to the computer display, the angle has not changed until the temperature thermometer detects about 440°C. As the temperature exceeds 440°C and continues to increase, the infrared measurement The thermometer is fed back to the control module, and the control module issues instructions, and the laser welding incident angle begins to decrease, and finally remains at about 525°C, and the laser welding incident angle is about 6°. It was found that the welding seam was well formed, and there were ...

Example Embodiment

[0048] Example 2

[0049] The invention performs fiber laser welding on the back cover of a certain brand 7000 series aluminum alloy mobile phone. Welding is carried out by butt joint, and argon is used as shielding gas for welding. The gas flow is set to 15L / min, the thickness of the back cover is about 2.5mm, the defocus is -2mm, the laser power is set to 2200W, and the welding speed is 50mm / s. Set the initial laser welding incident angle to 7°. According to the computer display, when the temperature is below about 470°, the laser incident angle remains unchanged. As the welding progresses, the temperature of a specific area continues to rise, reaching and After exceeding 470°, the control module gives feedback, the laser incident angle is changed, the welding temperature is finally maintained at 575°C, and the display angle is 5.5°. According to the welding results, the welding seam around the cover plate is well formed, and there are no defects such as collapse, blast holes...

Example Embodiment

[0050] Example 3

[0051] The present invention performs fiber laser welding on a 6061 aluminum alloy cooling system of a communication equipment integrated circuit of Huawei. Welding is carried out by butt joint, and argon gas is used as shielding gas for welding. The gas flow rate is set to 15L / min, the defocus amount is -2mm, the cover thickness is 4mm, the laser power is set to 2400W, and the welding speed is 30mm / s. The initial welding incident angle is set to 9°. Through observation of the computer, it is found that the temperature detected by the thermometer is always below 415°C, so the control module has not issued an angle adjustment command. After the welding is completed, it can be found that the overall welding seam is well formed, the weld pattern is clear, there are no obvious defects such as undercuts, weld bumps, pores, slag inclusions, etc. According to the cutting results, it is found that there are no defects such as burn-through, which conforms to the compreh...

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
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a laser welding incident angle real-time regulating and controlling system based on temperature feedback and a welding method of the laser welding incident angle real-time regulating and controlling system. The welding system comprises a laser welding module, a welding control module, a clamper and an infrared temperature feedback module, wherein the clamper and the infrared temperature feedback module are arranged on the side wall of the laser welding module, one end of the clamper is fixed on the side wall of the laser welding module, and the other end of the clamperis connected with the infrared temperature feedback module; and the angle of the infrared temperature feedback module is adjusted through the clamping end of the clamper, so that an infrared thermometer can conveniently measure the temperature of a specific area. According to the laser welding incident angle real-time regulating and controlling system based on temperature feedback and the weldingmethod, the average temperature of the specific area can be detected in real time through the real-time regulating and controlling system; if the temperature is too high, the system correspondingly makes feedback, the incident angle of laser welding is adjusted, the incident distance of lasers in the material is increased, and the burnthrough phenomenon is effectively prevented. The system and method are particularly suitable for welding thin cover plate structures such as aluminum and a magnesium alloy.

Description

technical field [0001] The invention relates to the field of metal material processing, in particular to a welding system and a welding method based on a temperature feedback-based laser incident angle of a cover plate structure that can be regulated in real time. Background technique [0002] The invention is mainly aimed at some specific structures. Due to the different thickness of the board, the thermal conductivity characteristics are also different in different positions. At the same time, the melting point of the material is relatively low, and the board is relatively thin. Some alloys that are particularly sensitive to laser heat input, such as Aluminum alloys and magnesium alloys are prone to burn-through when high-energy-density welding such as laser welding is used. [0003] A large number of tests have shown that when the welding temperature in a specific area exceeds a certain value, welding defects such as burn-through will occur, and because the welding parame...

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): B23K26/03B23K26/24
CPCB23K26/034B23K26/24
Inventor 李瑞峰徐诚禹杭陈书锦刘彬浦娟
Owner JIANGSU UNIV OF SCI & TECH
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