A Welding and Grinding Process at the Intersection of Three Sides

Abstract

The invention discloses a welding and grinding process at a position where three sides meet, comprising the following steps: S1. using a grinding wheel to grind the weld at the position where three sides meet; S2. using a whetstone to grind the weld at the position where three sides meet , during the grinding process, the axis of rotation of the whetstone is axially perpendicular to the weld, and the whetstone is operated to rotate in one direction along the O-shaped track; in step S1, the weld at the intersection position of the three sides includes the weld in the length direction and the intersection In step S2, the weld at the position where the three sides meet includes the weld in the longitudinal direction and the weld at the intersection. The welding and grinding process at the intersection position of the three sides described in the present invention solves the problem of grinding defects of the weld seam at the intersection position of the three sides of the weldment by standardizing the grinding process and flow, and at the same time avoids damage to the base material caused by repeated grinding at the same position , The work efficiency is low, which reduces the situation of repeated welding repairs caused by MT defects in flaw detection, and improves the quality of products.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a welding and grinding process at the intersection position of three sides. Background technique [0002] With the rapid development of my country's rail transit, how to control the production quality under the premise of ensuring production efficiency has become the most important issue. At present, there is a serious production bottleneck in the manufacture of the underframe at the end of the car body, that is, there are many complex intersection structures inside the car body bolster, and there are many welds at the three-side intersection positions of the side beams and cross beams on the welding frame of the EMU. Seam, where the space is narrow, there are too many weld layers, the grinding is difficult, and the amount of weld repair is large, which will cause the following quality risks: [0003] 1. The space is narrow, welding and repairing is difficult, and t...

AI Technical Summary

Problems solved by technology

At present, there is a serious production bottleneck in the manufacture of the underframe at the end of the car body, that is, there are many complex intersection structures inside the car body bolster, and there are many welds at the three-side intersection positions of the side beams and cross beams on the welding frame of the EMU. Seam, where the space is narrow, there are too many weld layers, the grinding is difficult, and the amount of weld repair is large, which will cause the following quality risks:

[0003] 1. The space is narrow, welding and repairing is difficult, and there is a risk of welding and repairing failure, which will cause parts to be scrapped;

[0004] 2. Manual repair welding is required, which is difficult to repair, consumes a lot of materials, and requires flaw detection for inspection, resulting in excessive economic losses;

[0005] 3. Repair welding will cause heat concentration and cause welding deformation of each seat, which requires repeated repairs

[0009] Therefore, it is necessary to improve the deficiencies and defects of the existing technology, provide a welding and grinding process at the intersection position of three sides, standardize the grinding process, avoid weld defects caused by repeated grinding, and avoid the defects caused by repeated grinding at the same position. Damage to the base metal and low work efficiency reduce repeated welding repairs caused by MT defects in flaw detection and improve product quality

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