High-efficiency CNC machining process of titanium alloy thin-walled web for aircraft wing

Abstract

A plane wing titanium alloy thin-wall web efficient numerical control machining technology comprises the following steps that (1) blanking is carried out; (2) web outer contour machining is carried out, and an ear piece for locating is machined; (3) a web is clamped, and a cavity on the front face of the web is machined; (4) a web side wall is machined; (5) web quick converting is carried out, and a cavity on the back face of the web is machined; (6) the locating ear piece is removed by milling; and (7) quality testing is carried out. The rigidity of a machining technology system is improved, unstressed machining is achieved, by optimized design of a feed track, the stability of a machining process is improved, machining speed is increased, titanium alloy shallow cutting large feeding milling technology parameters are used, heat deforming during machining is lowered, rectifying processes are omitted, the metal removing rate is improved by 30%-50%, finally, machining efficiency is obviously improved, the clamping time of workpieces is obviously shortened through a quick-reloading technology, the repeated locating accuracy of clamping is guaranteed, and accordingly numerically-controlled machine tool machining efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a high-efficiency numerical control processing technology for thin-walled titanium alloy webs of aircraft wings. Background technique [0002] Titanium alloy has high specific strength, its strength is close to that of ordinary steel, and its density is 4.5g / cm 3 ; High thermal strength, 450 ~ 500 ℃ strength remains high; good corrosion resistance, in humid atmosphere and seawater, corrosion resistance is better than stainless steel; chemical activity is large, easy to form with O and N in the atmosphere during processing Hardened layer; the thermal conductivity is small, only 1 / 5 of that of iron, and the temperature in the cutting zone is high; the elastic modulus is small, the rebound is large during cutting, and the flank wear is serious. [0003] Aircraft wing components must have sufficient strength, stiffness and fatigue resistance to resist defor...

AI Technical Summary

Problems solved by technology

[0004] At present, the main objective conditions that restrict the efficient processing of titanium alloy thin-walled webs (thickness is about 2mm) are: (1) Titanium alloy materials have poor thermal conductivity, most of the cutting heat cannot be taken away by chips, and the temperature at the tip of the tool is high. The flank wear of the rebound tool is serious; (2) The high-efficiency machining of titanium alloy is also a great challenge to the rigidity of the process system

[0005] The integration of aircraft structures and thin-walled designs are becoming more and more widely used, which also brings great challenges to the process design of efficient machining of titanium alloys

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