Pipe fitting processing technology

Abstract

The invention discloses a pipe fitting processing technology for manufacturing tee-fittings on aviation unmanned aerial vehicles. The technology comprises the steps of: a) performing, b) annealing treatment, c) cold extrusion, d) reshaping, and e) surface shot blasting treatment. The technology provided by the invention adopts advanced hot press forging and cold extrusion processing, the dimensional precision is high, the surface roughness is small, the internal metal fluidity is good, reasonable fiber flow linear distribution can be formed, and the tensile strength, wear resistance and mechanical properties are greatly enhanced. The manufactured seamless tee-fittings can effectively prevent air leakage and liquid leakage phenomena, have high safety coefficients and good use effect, can ensure no leakage of the hydraulic circuit. The tolerance and surface roughness can both reach the aviation industry standards, and 40% of the raw materials can be saved, the production cost is effectively reduced, the tee-fittings can be supportingly applied to China's unmanned aircrafts, and have advanced technology and market prospects.

Description

【Technical field】 [0001] The invention relates to the technical field of pipe fitting processing, especially the technical field of pipe fitting processing technology. 【Background technique】 [0002] Pipe fittings are a general term for components that play the roles of connection, control, direction change, diversion, sealing, support, etc. in the pipeline system. They are an important part of connecting pipes to pipelines. , flange fittings and welded fittings four categories. Pipe fittings are mostly made of the same material as pipes, including elbows, flanges, tees, crosses, and reducers. Pipe fittings are generally used to transmit fluids. In order to prevent fluid leakage, pipe fittings are generally required to be seamlessly connected, and the connected pipe fittings are required to have a size that matches each other, and the pipe fittings are connected by a certain combination method. [0003] In the aviation manufacturing industry, there are a large number of oi...

AI Technical Summary

Problems solved by technology

[0004] Tee fittings can play an important role in diverting flow, changing the direction of liquid flow, and relieving local stress in the pipeline system in oil and gas pipeline systems. At present, hydraulic bulging is a common method for manufacturing tee fittings, but in the bulging process, the main There are the following defects: (1) The middle part of the main pipe of the multi-way pipe fitting is seriously thickened

(2) The height of the branch pipe of the multi-way pipe fitting is not enough and excessive thinning occurs

In addition, the common method of manufacturing tee pipe fittings is the casting method, and the disadvantage of using the casting method to manufacture tee pipe fittings is that it is unfavorable for welding and cannot meet the welding occasions.

For pressure-bearing pipeline components, air leakage and liquid leakage caused by welding and casting processes occur from time to time, causing many uncertain safety hazards