Ultrasonic coaxial auxiliary laser welding method for plate heat exchanger

A plate heat exchanger and laser-assisted technology, which is applied in the field of material processing, can solve the problems of reducing the utilization rate of ultrasonic vibration, cumbersome design and operation of side shafts, and the reduction of ultrasonic vibration effect, so as to avoid weld porosity defects, enhance joint strength and Corrosion resistance, the effect of improving the performance of welded joints

Active Publication Date: 2016-03-23
CHANGCHUN UNIV OF SCI & TECH
View PDF16 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the ultrasonic vibration is non-contact, it greatly reduces the utilization rate of ultrasonic vibration, wastes a lot of ultrasonic resou

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
  • Ultrasonic coaxial auxiliary laser welding method for plate heat exchanger
  • Ultrasonic coaxial auxiliary laser welding method for plate heat exchanger
  • Ultrasonic coaxial auxiliary laser welding method for plate heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] Such as figure 2 , 3 Shown is the schematic diagram of the laser welding auxiliary process equipment. The design of the laser welding auxiliary process equipment is as follows: because the plate welding place has a groove-like structure with upper concave and lower convex, in order to facilitate the clamping and positioning of the plate, strengthen the support at the weld bead, and improve the up and down The contact conditions of the plates at the weld bead facilitate the implementation of gas protection on the back of the weld. On the bottom of the welding workbench 7, a corresponding plate weld is processed to a height 0.1mm larger than the welding groove of the heat exchanger plate 6. Boss, and mill out a welding reserved groove 10 with a width of not less than 3mm, at least 2mm smaller than the bottom of the welding groove, and a groove depth of not more than 3mm in the center of the boss; meanwhile, welding protection is set every 200-300mm The ga...

Example Embodiment

[0051] Example 2

[0052] Such as figure 2 , 3 Shown is a schematic diagram of laser welding auxiliary process equipment. The specific design of laser welding auxiliary process equipment is as follows: Because the plate welding place is concave and convex groove structure, in order to facilitate plate clamping and positioning, strengthen the support at the weld bead, and improve the up and down The contact conditions of the plates at the weld bead are convenient for the implementation of gas protection on the back of the weld. On the bottom of the welding table 7 corresponding to the plate weld, a height of 0.1mm larger than the welding groove of the heat exchanger plate 6 is processed Boss, and mill out a welding reserved groove 10 with a width of not less than 3mm, at least 2mm smaller than the bottom of the welding groove, and a groove depth of not more than 3mm in the center of the boss; meanwhile, welding protection is set every 200-300mm The gas channel 11 communicates wit...

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

No PUM Login to view more

Abstract

The invention discloses an ultrasonic coaxial auxiliary laser welding method for a plate heat exchanger, before a plate sheet of the plate heat exchanger is welded, a self-designed laser welding auxiliary process device is used for clamping the plate sheet of the heat exchanger, in a process of performing the laser welding, high frequency ultrasonic vibration is applied, the ultrasonic vibration and laser beams are applied in a coaxial manner, during laser welding, an ultrasonic vibration tool directly contacts with the plate sheet of the heat exchanger. The laser welding auxiliary process device designed according to the invention can effectively solve the problems of clamping difficulty of plate sheets made from different materials of the heat exchanger and gas protection of a welding connector, meanwhile, an auxiliary action of the ultrasonic vibration can reduce or eliminate a welding residual stress, refine welding seam crystal grains, homogenize a welding seam tissue, and reduce pore and crack defects, thus improving a welding anticorrosion performance and mechanical performances, and prolonging the service life of the plate heat exchanger.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to an ultrasonic coaxial-assisted laser welding method for materials commonly used in plate heat exchangers. The method belongs to the field of material processing, and is a novel and efficient welding method for plate heat exchangers. Background technique [0002] Plate heat exchanger is a highly efficient and compact heat exchanger, which can work normally in high temperature, high pressure and acid-base environment. It is widely used in chemical industry, machinery, metallurgy and other industries, but with the rapid development of modern industry, work Different environments require plate heat exchangers to have more excellent performance, so there are often pressure and temperature limitations and compatibility problems between fluids and gaskets during the use of plate heat exchangers. Laser welding has the advantages of fast speed, small deformation, large aspe...

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): B23K26/346
CPCB23K26/0093
Inventor 石岩陈俊科刘佳张宏刘双宇刘凤德倪聪李云峰
Owner CHANGCHUN 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