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Local vacuum sealing tool for laser welding and laser welding device

A technology of laser welding and partial vacuum, which is applied in the direction of laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of low welding efficiency and large size limitation of workpieces, and achieve high practicability, short vacuuming time, and large volume of vacuum chamber small effect

Pending Publication Date: 2019-10-01
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: vacuum laser welding equipment is limited by the size of the workpiece, needs to perform multi-layer and multi-pass welding, and has low welding efficiency. The present invention provides a local vacuum sealing tool for laser welding and Laser welding device

Method used

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  • Local vacuum sealing tool for laser welding and laser welding device
  • Local vacuum sealing tool for laser welding and laser welding device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This embodiment provides a local vacuum sealing tool for laser welding, including a sealing cover I1 and a sealing cover II2. The sealing cover I1 includes a body I11, and a vacuum groove I12 is provided on one side of the body I11. The body I11 has a cuboid plate structure , the extension direction of the vacuum groove I12 is in the same direction as the axis direction of the body I11; the sealing cover II2 includes the body II21, the vacuum groove II22 is provided on one side of the body II21, and the other side of the body II21 is equipped with a mounting Groove 23, the extension direction of the installation groove 23 is in the same direction as the extension direction of the vacuum groove II 22, and the installation groove 23 communicates with the vacuum groove II 22 in the extension direction, and the installation groove 23 is used to seal and fix the laser protection lens 31; the body II 21 is similar to Cuboid structure, radial cross-section is "convex" shape str...

Embodiment 2

[0053] Further improvement on the basis of Example 1, the side plate of the body I11 is also provided with a sealing ring I14 distributed inside and outside, and the sealing ring I14 is distributed in a continuous closed loop along the circumference of the vacuum groove I12 notch, and is used for sealing pressure. Immediately between one side of the main body I11 and the plate surface of the plate 4 to be welded. There are also two sealing rings II25 distributed inside and outside on one side of the body II21. The sealing rings II25 are distributed in a continuous closed loop along the circumference of the notch of the vacuum groove II22, and are used for sealing and pressing on the side plate of the body II21 and Between the board faces of the flat plate 4 to be welded.

Embodiment 3

[0055] Further improvement on the basis of Embodiment 2, the sealing cover II2 also includes a hollowed-out lens pressing plate 26, the lens pressing plate 26 covers the mounting groove 23; Sealing gasket 27; when in vacuum use state, between the plate surface of lens pressing plate 26 and laser protection lens 31 one side plate surface is sealed and contacted by sealing gasket 27, between the bottom surface of mounting groove 23 and laser protection lens 31 other side plate surface The contact between them is sealed by the sealing gasket 27. The lens pressing plate 26 is fixed on the body II 21 by bolts 8. There are strip holes on the lens pressing plate 26. The strip holes are used for the laser to pass through and directly shine on the laser protection lens 31. The length of the strip holes extends in the same direction as the installation groove 23. The extension directions of are in the same direction, and the extension lengths of the two are equal.

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Abstract

The invention discloses a local vacuum sealing tool for laser welding. The local vacuum sealing tool is characterized in that s sealing cover I comprises a body I, a vacuum groove I is formed in the body I; a sealing cover II comprises a body II, a vacuum groove II and a mounting groove are formed in the body II, the mounting groove and the vacuum groove II extend in the same direction and communicate with each other, and a laser protection lens is arranged in the mounting groove; and the body I and the body II are correspondingly provided with an air hole I and an air hole II which correspondingly communicate with the vacuum groove I and the vacuum groove II. A laser welding device comprises a vacuumizing system, a laser welding system and the local vacuum sealing tool. When the local vacuum sealing tool is in use, the sealing cover I and the sealing cover II are arranged on two side plate surfaces of a to-be-welded flat plate correspondingly, the vacuum groove I and the vacuum grooveII are opposite to a joint part, and then vacuumizing and laser welding operation are carried out. The local vacuum sealing tool is flexible to assemble and disassemble, small in vacuum chamber size,short in vacuumizing time and high in efficiency, and limitation of existing vacuum laser welding equipment on welding of large-size and large-thickness structural materials is break through.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a local vacuum sealing tool for laser welding and a laser welding device. Background technique [0002] Laser welding technology has the advantages of fast welding speed, small welding deformation and high degree of automation, and is widely used in aerospace, automobile, ship, rail transit and other industries. Phenomena such as absorption and absorption have a certain "shielding effect" on laser transmission, which seriously reduces the laser power density reaching the surface of the workpiece, changes the laser transmission path, greatly reduces the penetration depth of the seam, and the seam is poorly formed. This "shielding effect" is also gradually enhanced. [0003] In recent years, with the emergence of high-power fiber lasers and disk lasers, vacuum laser welding technology has also been developed rapidly. The vacuum environment has a good effect on suppressing plasma....

Claims

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Application Information

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IPC IPC(8): B23K26/12B23K26/21B23K26/70
CPCB23K26/1224B23K26/702B23K26/21
Inventor 王群滕文华徐猛连克难凌彤
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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