Titanium alloy, as a material with excellent performance, has been applied in CNC machining. However, titanium alloy parts plus I also have a certain degree of difficulty, easy to cause deformation problems caused by parts processing quality can not meet the requirements. Therefore, the research on the processing technology of titanium alloy parts should be strengthened, so as to further promote the large-scale development of titanium alloy parts.

1 Difficulties in Processing Titanium Alloy Parts The processing of titanium alloy parts has certain difficulties. In the early stage of cutting, the problem of excessive consumption of cutting tools for processing shell workpieces will be encountered, resulting in large wear of blade materials and unsatisfactory surface finish of parts, which are related to factors such as complex organization and high affinity of titanium alloy materials. In the actual machining process, because the lattice atoms are not easy to leave the original equilibrium position, the cutting temperature will rise rapidly, resulting in tool wear. However, the thermal conductivity of titanium alloy is small and the heat dissipation is poor. During cutting, the working area will realize temperature aggregation, causing collapse and affecting the surface quality of parts.

[1]]. Affected by the amount of feed, depth of cut, speed and other factors, the parts will be deformed when they encounter machine tool vibration during processing. The rigidity of thin-walled parts is low, and the overall accuracy will be affected by the cutting stress. In addition, titanium alloy has a high chemical activity, and the chemical reaction with gas impurities will lead to the addition of 0, N and other elements in the material, or cause lattice bending, resulting in a decrease in the plasticity of the material, or the formation of a surface hard layer, causing damage to the tool. Therefore, the use of titanium alloy processing precision components, affected by the processing technology, it is difficult to meet the requirements of dimensional accuracy, shape and position tolerance.

[2] Cutting deformation control. In terms of deformation control, the direct use of precision machining after rough machining of parts will lead to excessive machining allowance and cannot completely release the stress. When the cutting amount is fast, large radial cutting force will be generated, causing deformation of parts. In response to this problem, but also to add a semi-finishing link, in the rough machining after the first semi-finishing, and finally finishing. In the finishing process, the cutting speed control should also be strengthened to avoid cutting vibration problems. After finishing, considering that the process processing stress is difficult to eliminate all, heat treatment should also be realized to avoid the deformation of parts processing to the greatest extent. Before the rough machining of the blank, the heat treatment of the parts can also be carried out so that the mechanical properties of the parts are guaranteed and the deformation caused by the heat treatment is reduced. Because there is a certain relationship between the machining deformation of the parts and the fixture, it is also necessary to select the fixture with the low strength of the thin-walled titanium alloy parts. For the bottom of the wall such as thin position, should also choose three jaw chuck, so that the number of stress points and parts and fixture contact area is reduced. When the chuck clamping force is large, it is easy to cause deformation of thin-walled parts. In view of this situation, the slotted sleeve can be used to increase the contact area appropriately, so that the clamping force can be evenly arranged on the workpiece, so that the problem of part deformation can be improved.

In view of the above processing difficulties, KHC tungsten steel milling cutter in Germany has developed and designed cutting tools in this area. The special cutting edge design is smooth cutting, preventing chipping and unequal segmentation design. It has stable and efficient cutting efficiency. TIALN composite coating with good heat resistance and high stability is adopted to enhance the wear resistance, heat resistance and service life of cutting tools. It mainly focuses on aerospace, medical equipment, general machinery and other fields.