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Due to the high strength of titanium alloy, no magnetic, good medium temperature, good weldability, lameness resistance and other characteristics, it has been widely used in the field of aviation, weapons and equipment, ships and some of the warp artillery and so on. In recent years, the application of titanium alloy technology has made great progress, but there are also some problems that need further research, and I hope that there will be greater breakthroughs in the field of processing technology in the future.
On the basis of understanding the processing mechanism of titanium alloy, coupled with previous experience, the main process tips for processing titanium alloy are as follows:
(1) The blade with positive Angle geometry is used to reduce cutting force, cutting heat and deformation of the workpiece.
(2) Maintain a constant feed to avoid hardening of the workpiece, the tool should always be in the feed state during the cutting process, and the radial cutting amount a e should be 30% of the radius during milling.
(3) The high pressure and large flow cutting fluid is used to ensure the thermal stability of the processing process and prevent the surface denaturation of the workpiece and tool damage due to high temperature.
(4) Keep the edge of the blade sharp, blunt tools are the cause of thermal accumulation and wear, easy to lead to tool failure.
(5) As far as possible in the soft state of titanium alloy processing, because the material becomes more difficult to process after hardening, heat treatment increases the strength of the material and increases the wear of the blade.
(6) Use a large tip arc radius or chamfer cut to put as much of the blade into the cutting as possible. This reduces the cutting force and heat at every point, preventing local breakage. In milling titanium alloy, the effect of cutting speed on tool life vc is greater, followed by radial cutting amount (milling depth)ae.