Sheathing straight seam automatic argon arc welding equipment and welding process

Abstract

The invention provides a sheathing straight seam automatic argon arc welding equipment and a welding process. The sheathing straight seam automatic argon arc welding equipment comprises a welding machine frame, a workpiece table, a welding machine, an argon arc welding power supply and a control device, workpiece tools are installed on the workpiece table, and a three-dimensional linear module isinstalled on the upper portion of the welding machine frame, an automatic wire feeding mechanism and welding guns are arranged at the lower part of the Z-direction linear module. The sheathing straight seam automatic argon arc welding process is characterized in that four points A, B, C and D are defined on the length of the whole straight seam, arc striking is carried out on the point A and the arc striking is kept for a certain time, then the welding of the AB section is carried out at a constant speed V1, and the speed is increased after the point B is reached, the speed V2 is used for carrying out the welding of the BD section, and the arc extinguishing is carried out and kept for a certain time after the point D is reached, and then arc striking is carried out at a speed V3 to carry out the welding of the DC section, the arc extinguishing is carried out and kept for a certain time after the point C is reached, and then secondary arc striking is carried out for a certain time. According to the equipment and process, the welding quality can be effectively ensured.

Description

technical field [0001] The invention relates to welding technology, in particular to sheathed straight seam automatic argon arc welding equipment and a welding process, belonging to the technical field of welding equipment. Background technique [0002] The jacket is an important part in the hot isostatic pressing process. The powder filled in the jacket is worth tens of thousands to hundreds of thousands according to its capacity and composition. If the seal of the jacket is not good, the powder filled in the jacket will be scrapped. , causing a lot of material waste and loss, and the quality of the welded seam of the sheath directly affects the sealing of the sheath. Most of the existing wrappings are crimped corner joints and crimped butt joints such as figure 1 For crimp welding, the weld penetration is required to be consistent, without porosity and slag inclusion. [0003] At present, the main problems of sheath welding are: [0004] 1. Manual argon arc welding is u...

AI Technical Summary

Problems solved by technology

[0004] 1. Manual argon arc welding is used for crimping welding, which has low efficiency, high labor intensity and high mental pressure for workers, and the welding quality is not easy to guarantee, and the welding quality is greatly affected by the technical level of the welding workers;

[0005] 2. Ordinary straight-line welding equipment can easily realize straight-line welding between two points. However, due to the different lengths of weld seams and different materials, their thermal conductivity coefficients are different, resulting in different temperatures of the weld seam in the arc-starting section and the arc-stop section. The length of the arc section is different, and the welding speed should be different. The current linear welding equipment has no technical reference application for sheath welding;

[0006] 3. The thickness of the cladding plate is generally 2-3mm. The quality of the arc starting point and the arc extinguishing point is extremely important when the thin plate is curled. Because the temperature of the arc starting section and the arc extinguishing section is different, the quality of the weld is not easy to guarantee. The temperature is low, and the weld seam is not full enough. At the arc extinguishing point, the workpiece is subjected to continuous high-temperature heat input, and the temperature is high. The welding base metal is easy to collapse, and the weld seam is easy to flow;

[0007] 4. There is a certain error in the processing of the plate, and it is easy to misalign the two plates when welding. Ordinary welding equipment will weld unevenly and undercut easily, which will seriously affect the structural strength and sealing of the sheath;

[0008] 5. In the current automatic welding of argon arc welding, the welding wire reel does not move with the welding torch, resulting in a very long wire feeding tube, which causes greater resistance when feeding the wire, and may also get stuck

Smooth, timely and controllable wire feeding is difficult to achieve, and cannot meet the requirements including welding quality

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