Because of its compact structure, light weight and material saving, thin-walled seamless pipe fittings have been more and more widely used in the industrial field. However, due to the low strength and poor rigidity of thin-walled seamless tube parts, it is difficult to guarantee the accuracy of parts processing, and the processing of thin-walled parts is difficult to become a prominent problem. There are many factors affecting the processing accuracy of thin-walled seamless pipe parts. Machine tools, cutting tools, clamping of workpieces and workpieces, cutting force, cutting heat and so on will cause parts processing errors. It is difficult to process thin-walled seamless pipe fittings, especially holes, because in the process of cutting, parts are easily deformed due to the effect of cutting force. Causes the ellipse or the middle small, two big "waist" phenomenon. In addition, thin-walled parts are prone to thermal deformation due to poor heat dissipation in the process of processing. Size and shape errors can not meet the requirements of drawings, so that the shape and error of parts increase, and it is not easy to ensure the quality of parts processing. How to reduce the influence of cutting force on workpiece deformation, so as to fully consider the impact of process problems on the quality of parts processing, workpiece clamping, tool geometry, cutting amount and other programming testing, effectively overcome the thin-walled parts in the deformation process, to ensure processing accuracy.


Characteristics of thin-walled parts: According to the technical requirements of the drawings, the workpiece material is processed by seamless steel tube, and the surface roughness of the hole and the outer wall is Ra1.6, which can realize turning. But for thin-walled seamless pipe, the requirement of cylindrical hole diameter of 0.03 is relatively high. In batch production, the technological route is roughly as follows: cutting-heat treatment-automobile end-automobile Outside-automobile hole-quality inspection.