The pitot tubes’ material is 2A12 aluminum alloy

belongs to Al–Mg–Cu–Si–series wrought aluminum alloy. The alloy has good corrosion resistance

weld ability and cold working ability. It is mainly made of aluminum alloy with copper as the strengthening term. Because the main alloy elements contain Mg

Si

and form Mg2Si

they have better processing properties and higher tensile strength

yield strength and hardness. Strengthened copper content is relatively high

hardness is moderate

thermal conductivity is large

beneficial to cutting. At the same time

it is easy to cause hot deformation in cutting. Therefore

it is difficult to control the dimensional accuracy. In this paper

the robot belt grinding method and adaptive machining technology was used to grind the pitot tubes of aluminum alloy. The point position in formation of parts was identified by blue light and added into Polyworks software based on standardized model. According to the point position information extracted from the web welded airspeed tube parts

the fourth-order homogeneous matrix was established to inversely calculate the motion trajectory of the robot to ensure the grinding posture and grinding param eters. Finally

the adaptive processing method is adopted

according to the surface allowance information of the web welded pitot tube parts. Then

the material removal of web welded pitot tube parts is quantitatively carried out to ensure the processing accuracy.