Welding support device

Abstract

The invention discloses a welding supporting device, which comprises a base plate and a tire supporting component, wherein the tire supporting component comprises a guide rod, a pedestal, a plurality of tire bodies, a plurality of ejector rods and a plurality of pressing blocks; the guide rod is a central support rod of the tire supporting component; the pedestal comprises a plurality of branches which are circumferentially distributed, and are assembled on the guide rod; threaded holes radially extending for assembling the ejector rods are formed in the pedestal; the tire bodies are distributed along the circumferential direction of the pedestal to be suitable for supporting a workpiece to be welded; the pressing blocks are fixedly arranged on the ejector rods respectively, and are used for internally supporting the tire bodies; a radial sliding regulation groove is formed in each tire body; the ejector rods are connected with the pedestal and the corresponding pressing blocks respectively. According to the welding supporting device, the radially independently adjustable tire bodies are arranged to support the inner surface of the workpiece into a required shape, so that the welding deformation of the workpiece is conveniently reduced, the welding quality of the workpiece is further improved, the reject rate of products is lowered, and the products are conveniently produced in small batches; moreover, the welding supporting device is convenient to use, safe and reliable.

Description

technical field [0001] The invention relates to the field of process equipment manufacturing, in particular to a welding support device. Background technique [0002] In the existing process equipment, there are few types of support devices used to support the workpiece to be processed, and the adjustability is low, which cannot meet the actual production needs. [0003] A welding support device is disclosed in the related art. The welding support device is composed of an adjusting nut, a cone ring, a cover plate, an expansion block, a backing plate, a positioning plate, a sleeve and the like. Among them, the welding support device can move the cone ring axially in the sleeve by turning the adjusting nut, so that the expansion block that fits the cone surface of the cone ring can move radially in the guide groove of the positioning plate, and finally realize the working diameter adjustment. In addition, the expansion block and the backing plate mostly adopt an integral str...

AI Technical Summary

Problems solved by technology

[0004] In actual production, often because the workpieces to be welded are thin-walled sheet metal parts and forging machined parts, the inner surface cannot achieve a smooth transition. When the above-mentioned welding support device is used, the inner surface of the part of the workpiece that needs to be welded cannot be smooth. Smooth transition, welding support in place is difficult, poor assembly quality before welding, large deformation after welding may easily lead to product scrapping, and the pass rate is very low

For example, in the production of the combustion chamber casing assembly in a turbofan engine, when the above-mentioned welding support device is used for support, the backing plate will first touch the inner surface of the outer ring of the forging diffuser, resulting in the backing plate being unable to support the thin-walled sheet metal The inner surface of the metal parts is in place

This leads to irregular internal profiles after the actual assembly of the outer ring of the diffuser, the thin-walled shell, and the mounting seat of the casting to be welded. There are many welding cracks at the corners, and there are obvious wavy deformations on the wall surface of the thin-walled shell within 15-20mm around the weld seam. The deformation amount is more than 3mm, which cannot meet the design requirements and lead to product scrapping, and the production pass rate is extremely low.

Images