Welding method and special fixture for heavy-duty axle reinforcement ring

Abstract

The invention relates to a welding method and a special fixture for a heavy-duty axle reinforcement ring, which is suitable for welding between a heavy-duty axle reinforcement ring and the middle section of an axle housing, and belongs to the technical field of automatic assembly and welding for automobile production. The technical solution is: including the inner ring positioning mechanism of the workpiece, the centering clamping mechanism (5) at both ends, the reinforcing ring pressing mechanism and the fixture displacement welding mechanism, and through the cooperation of the oil distribution mechanism, the gas distribution mechanism and the power distribution mechanism, the alignment is completed. Positioning, pressing and welding of the workpiece (9). The invention has a reasonable design and structure, and can directly carry out continuous welding without spot welding after the reinforcing ring and the middle section of the axle housing are positioned. It can be used in conjunction with a welding robot, which can meet the change of the welding process angle and improve the welding quality; Positioning and clamping, pressing the reinforcing ring on the middle section of the axle housing, using a set of tooling with the handling robot and welding robot, to realize automatic loading and unloading, positioning, pressing and welding, improving efficiency and ensuring product quality.

Description

technical field [0001] The invention relates to a welding method and a special fixture for heavy-duty axle reinforcement rings, which are suitable for welding between heavy-duty axle reinforcement rings (referred to as reinforcement rings) and heavy-duty automobile middle section axle housings (abbreviated as axle housing middle sections), and belong to automobile production automation Assembly welding technology field. Background technique [0002] At present, in the welding production process of heavy-duty axles, since the ring of the reinforcement ring is a rough-machined part, and after cutting the gap, the surface flatness is uneven; After the axle housing is assembled, if it is not pressed tightly, there may be a certain gap, which will affect the welding of the outer weld seam and the threaded hole processing, and especially may reduce the overall performance of the axle housing. Therefore, try to eliminate or control the gap to a minimum before welding. small; see a...

AI Technical Summary

Problems solved by technology

[0002] At present, in the welding production process of heavy-duty axles, since the ring of the reinforcement ring is a rough-machined part, and after cutting the gap, the surface flatness is uneven; After the axle housing is assembled, if it is not pressed tightly, there may be a certain gap, which will affect the welding of the outer weld seam and the threaded hole processing, and especially may reduce the overall performance of the axle housing. Therefore, try to eliminate or control the gap to a minimum before welding. small; see attached figure 1 , is the pairing diagram of the reinforcement ring 1 and the middle section of the axle housing 2. The two ends of the middle section of the axle housing 2 are symmetrically provided with circular tubes. The pairing of the reinforcement ring 1 and the middle section of the axle housing 2 is called a workpiece. The underside of the ring is uneven, resulting in different gaps. Before welding, the gap needs to be eliminated or reduced to a small enough size

Now, the method of the background technology is: first press the reinforcement ring and the middle section of the axle housing with an oil cylinder tool, then perform spot welding firmly, and then transfer to a common welding fixture for continuous welding. In this way, at least two sets of equipment are required To complete the welding of the reinforcement ring; in addition, changing tooling and stations wastes time, reduces work efficiency, and is not conducive to the improvement of welding quality

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