Composite welding method combining laser with friction stir welding

A technology of friction stir welding and hybrid welding, applied in laser welding equipment, welding equipment, non-electric welding equipment and other directions, can solve the problems of low welding heat input, restricting the development of laser welding of stainless steel, and high requirements for mounting accuracy, and achieves good results. The effect of welding

Active Publication Date: 2013-04-03
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, because laser welding has the characteristics of high power density, low welding heat input, small welding heat-affected zone and small welding deformation, it is widely used in the field of stainless steel welding, but laser welding has high requirements for clamping accuracy, which also restricts The development of laser welding of stainless steel

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  • Composite welding method combining laser with friction stir welding

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Comparison scheme
Effect test

Embodiment 1

[0012] The thickness of the stainless steel plate 1 to be welded is 20mm, and the first laser beam 3, the friction stirring head 2, and the second laser beam 4 are arranged in sequence along the welding direction; the first laser beam 3 originates from a CO2 laser, and the first laser beam The angle between the central line of 3 and the vertical direction on the surface of the stainless steel plate is α=30°, the laser power of the first laser beam is P1=1400w, adjust the position of the focus of the laser beam relative to the surface of the stainless steel plate to be welded, so that The diameter of the laser spot radiated on the workpiece to be welded is at 5mm; the second laser beam 4 originates from a CO2 laser, the center line of the second laser beam is perpendicular to the surface of the stainless steel plate, and the first laser beam's Laser power is P2=2000w; The included angle between the center line of the friction stirring head and the vertical direction on the surfa...

Embodiment 2

[0014] The thickness of the stainless steel plate 1 to be welded is 25mm, and the first laser beam 3, the friction stirring head 2, and the second laser beam 4 are arranged in sequence along the welding direction; the first laser beam 3 originates from a CO2 laser, and the first laser beam The angle between the central line of 3 and the vertical direction on the surface of the stainless steel plate is α=30 °, the laser power of the first laser beam is P1=1800w, adjust the position of the focus of the laser beam relative to the surface of the stainless steel plate to be welded, so that The diameter of the laser spot radiated on the workpiece to be welded is at 3mm; the second laser beam 4 originates from a CO2 laser, the center line of the second laser beam is perpendicular to the surface of the stainless steel plate, and the first laser beam's The laser power is P2=4000w; The center line of the friction stirring head and the vertical angle of the stainless steel plate surface a...

Embodiment 3

[0016] The thickness of the stainless steel plate 1 to be welded is 35mm, and the first laser beam 3, the friction stirring head 2, and the second laser beam 4 are arranged successively along the welding direction; the first laser beam 3 originates from a CO2 laser, and the first laser beam The angle between the central line of 3 and the vertical direction on the surface of the stainless steel plate is α=15°, the laser power of the first laser beam is P1=2000w, adjust the position of the focus of the laser beam relative to the surface of the stainless steel plate to be welded, so that The diameter of the laser spot radiated on the workpiece to be welded is at 4mm; the second laser beam 4 originates from a CO2 laser, the center line of the second laser beam is perpendicular to the surface of the stainless steel plate, and the first laser beam's Laser power is P2=3500w; The included angle between the center line of the friction stirring head and the vertical direction on the surf...

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Abstract

The invention discloses a composite welding method which can realize the high welding speed and the high welding quality of welded plates. The welding method applies a composite welding technology combining laser with friction stir welding to the high-efficiency connection of the hard welded plates such as stainless steel, solving the problem of friction stir welding high-efficiency connection of the hard welded plates. The method mainly comprises the following steps that on a welded plate to be welded, the plate thickness of the welded plate is 20 to 50mm; a first laser beam is arranged on the back of the welded plate, and a second laser beam and a friction stir head are arranged on the front of the welded plate; and the first laser beam, the friction stir head and the second laser beam are sequentially arranged along a welding direction.

Description

technical field [0001] The invention relates to the field of laser processing and manufacturing, in particular to a hybrid welding method combining laser and friction stir welding. Background technique [0002] Since the friction stir welding is a solid phase welding method that uses the high-speed rotating stirring head and the shaft shoulder and the metal to be in a plastic state. As the stirring head advances, the metal moves to the rear of the stirring head to form a solid-phase welding method, so it is suitable for The welding of softer metals has been successfully applied to the welding of non-ferrous metals such as Al and Cu, but at the same time, there are still disadvantages in the friction stir welding of harder welding plates. For example, due to the high hardness of stainless steel, its welding speed is slow and its efficiency is low, which has become a shackle restricting the wide application of friction stir welding of stainless steel; in addition, based on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K20/12B23K26/20B23K26/21
Inventor 赵伟芳林学春侯玮于海娟李晋闽
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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