A kind of titanium cylinder processing technology

Abstract

The invention relates to the field of mechanical manufacturing, in particular to a titanium cylinder machining process. The titanium cylinder machining process comprises the steps of raw material preparation and processing, reeling forming, part grinding, part assembly, surface cleaning for dust and oil removal, vacuum brazing, detection after welding, surface treatment and the like. The titanium cylinder machining process adopts a vacuum brazing furnace to perform automatic brazing and replace manual argon arc welding, the degree of automation is high, the brazing efficiency and quality are improved, and the harm of the brazing to people is also reduced.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a titanium cylinder processing technology. Background technique [0002] Titanium is a chemical element, chemical symbol Ti, is a silver-white transition metal, its light weight (density 4.54g / cm 3 , 43% lighter than steel), high strength, strong corrosion resistance (including seawater, aqua regia and chlorine), good heat resistance, and a melting point as high as 1668°C. The hardness of titanium is about the same as that of steel, but its weight is almost half that of steel of the same volume. Although titanium is slightly heavier than aluminum, its hardness is twice as strong as aluminum; titanium has high strength, and the tensile strength of pure titanium is the highest. Up to 180kg / mm². Because of its stable chemical properties, good high temperature resistance, low temperature resistance, strong acid resistance, strong alkali resistance, high strength and low dens...

AI Technical Summary

Problems solved by technology

[0005] At present, the processing technology of the cylinder (pump) of titanium material includes raw material processing, rolling forming, manual longitudinal seam welding (full seam welding is performed by a combination of argon arc priming and gas shielded welding. Up to the standard can be corrected with the help of a hydraulic press and an adjustable arc pressure plate), weld inspection, heat treatment; then circular seam welding, weld inspection, heat treatment and other steps; it uses manual argon arc welding to weld each weld, After inspection and heat treatment, the other welding joints are welded, and the process is more complicated.

[0006] Titanium alloys are very easy to react with oxygen, nitrogen, hydrogen and other substances, thus forming a layer of oxide-based surface layer on the surface, which will prevent the wetting of the solder during brazing. There is no effective processing technology in the existing processing technology. Removal of this oxide layer will result in severe solder joints and poor product quality

[0007] Due to the extremely active chemical properties of titanium, it is very easy to react with air at high temperatures. Therefore, when welding titanium materials in the industry, a combination of argon arc priming and gas shielded welding is used for manual full seam welding. If the degree is not up to standard, it can be corrected with the help of a hydraulic press and an adjustable arc pressure plate. The operation is complex and technically difficult, requiring skilled welders to operate, and the labor cost is high; argon arc welding only protects the surface of the product with argon gas. There are oxidation and hydrogenation defects in the hollow interior of the cylinder (pump), and the weld is impenetrable, resulting in stress concentration, which is prone to fatigue and fracture during use; the welding scar of argon arc welding is large, and post-weld finishing is difficult; At the same time, the speed of argon arc welding is slow, the production efficiency is low, and it is not suitable for mass production; in addition, argon gas is harmful to the human body, and for welders who have been engaged in this work for a long time, there is a certain threat to their health