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, etc., can solve the problems of low welding heat input, inability to complete plates, and restrictions on welding thickness

Active Publication Date: 2013-04-03
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • 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
[0003] Due to the influence of the size of the stirring head during friction stir welding, each type of stirring head has a maximum processing size, which also restricts its welding thickness, and cannot complete the processing of plates exceeding its maximum processing size

Method used

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  • Composite welding method combining laser with friction stir welding

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Effect test

Embodiment ( 1

[0016] When the thickness of the stainless steel plate 1 to be welded is 30 mm, the first laser beam 3, the first friction stirring head 2, the second friction stirring head 5, and the second laser beam 4 are sequentially arranged along the direction opposite to the welding direction; The beam 3 and the second friction stirring head 5 are arranged on the back of the stainless steel plate, and the second laser beam 4 and the first friction stirring head 2 are arranged on the front of the stainless steel plate; the first laser beam 3 originates from a CO2 laser, and the first laser beam The angle between the centerline of the beam 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=1200w, and the focal point of the first laser beam is adjusted relative to the surface of the stainless steel plate to be welded The position that makes the diameter of the laser spot radiated on the stainless steel plate to b...

Embodiment ( 2

[0018]When the thickness of the stainless steel plate 1 to be welded is 40 mm, the first laser beam 3, the first friction stirring head 2, the second friction stirring head 5, and the second laser beam 4 are sequentially arranged along the direction opposite to the welding direction; A laser beam 3 originates from a CO2 laser, the angle between the center line of the first laser beam 3 and the vertical direction on the surface of the stainless steel plate is α=30°, and the laser power of the first laser beam is P1=1600w, 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 5mm; the second laser beam 4 originates from a CO2 laser, and the center of the second laser beam The line is perpendicular to the surface of the stainless steel plate, the laser power of the second laser beam is P2=4500w; the first friction stirring head is arranged...

Embodiment ( 3

[0020] When the thickness of the stainless steel plate 1 to be welded is 50 mm, the first laser beam 3, the first friction stirring head 2, the second friction stirring head 5, and the second laser beam 4 are sequentially arranged along the direction opposite to the welding direction; Laser beam 3 originates from CO2 laser, the angle between the center line of the first laser beam 3 and the vertical direction on the surface of the stainless steel plate is α=22 °, and the laser power of the first laser beam is P1=2000w, adjusted The position of the focus of the laser beam relative to the surface of the stainless steel plate to be welded makes the diameter of the laser spot radiated on the workpiece to be welded at 3mm; the second laser beam 4 originates from a CO2 laser, and the center line of the second laser beam Vertical to the surface of the stainless steel plate, the laser power of the second laser beam is P2=6000w; the first friction stirring head is arranged on the front ...

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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 stainless steel. The welding method applies a composite welding technology combining laser with friction stir welding to the high-efficiency connection of 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 stainless steel plate to be welded, the thickness of the stainless steel plate is 20 to 50mm; a first laser beam is arranged on the back of the stainless steel plate, and a second laser beam and friction stir heads are arranged on the front of the stainless steel plate; the first laser beam, the first friction stir head, the second friction stir head and the second laser beam are sequentially arranged along the opposite direction of a welding direction; and wherein, the first friction stir head and the second friction stir head are respectively positioned at different sides of the stainless steel plate.

Description

technical field [0001] The invention relates to the field of laser processing and manufacturing, in particular to a composite 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 when friction stir welding harder metals such as stainless steel. Due to the high hardness of stainless steel, its welding speed is slow and its efficiency is low, which has become a shackle that restricts the wide application of friction stir welding of stainless steel; in addition, based on...

Claims

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Application Information

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IPC IPC(8): B23K28/02B23K20/12B23K26/20B23K26/21
Inventor 林学春赵伟芳侯玮于海娟李晋闽
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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