Processing technology of aluminum alloy testing bracket

Abstract

The invention discloses a processing technology of an aluminum alloy testing bracket. The processing technology comprises the following steps of: step 1: processing a spare part, step 2: performing welding treatment, step 3: performing weld joint quality inspection, step 4: performing annealing treatment, and step 5: performing vibration for destressing. A high power density welding technology isadopted to avoid an infusible oxidation film generated on the surface of an aluminum alloy; a shrinkage allowance of a weld joint is reserved to avoid welding deformation after the welding treatment;a double-faced full welding manner is adopted for welding, so that the bracket is high in structural strength; a welding structure is subjected to flaw detection by various manners to ensure that allthe weld joints reach level II; the annealing treatment and the vibration are adopted for destressing, so that structure stress generated by the welding treatment is greatly removed; the strength of the welding structure is ensured; and welding units are calibrated and leveled after each welding procedure to guarantee position precision and dimension precision of the welding units, such as coaxiality, parallelism and planeness.

Description

technical field [0001] The invention belongs to the technical field of mechanical technology, and in particular relates to a processing technology of an aluminum alloy test bracket. Background technique [0002] The test tooling is welded by a large number of aluminum plates, the distance between the plates is small, and the welding workers have insufficient operating space; while the aluminum alloy welded joints are severely softened and the strength coefficient is low; at the same time, the surface of the aluminum alloy is prone to produce refractory oxide film (The melting point of Al2O3 is 2060°C), and it is easy to produce pores; aluminum alloy welding is easy to produce hot cracks, the linear expansion coefficient is large, and welding deformation is easy to occur; the thermal conductivity of aluminum alloy is large (about 4 times that of steel), and the same welding speed Under the circumstances, the heat input is 2 to 4 times larger than that of the welded steel, so ...

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Problems solved by technology

[0002] The test tooling is welded by a large number of aluminum plates, the distance between the plates is small, and the welding workers have insufficient operating space; while the aluminum alloy welded joints are severely softened and the strength coefficient is low; at the same time, the surface of the aluminum alloy is prone to produce refractory oxide film (The melting point of Al2O3 is 2060°C), and it is easy to produce pores; aluminum alloy welding is easy to produce hot cracks, the linear expansion coefficient is large, and welding deformation is easy to occur; the thermal conductivity of aluminum alloy is large (about 4 times that of steel), and the same welding speed In this case, the heat input is 2 to 4 times larger than that of the welded steel, so it is easier to weld and deform; the welds of each layer of the tooling are on the same level, which is prone to stress concentration

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