The difficulty of processing titanium alloy precision parts is actually not high, because you have not found the right method（2）

2. Process know-how for processing titanium alloys

On the basis of understanding the processing mechanism of titanium alloy precision parts, plus the previous experience, the main process know-how for processing titanium alloy is as follows:

 (1) Adopt positive-angle geometry inserts to reduce cutting force, cutting heat and workpiece deformation.

 (2) Maintain a constant feed to avoid the hardening of the workpiece. During the cutting process, the tool should always be in the feed state. During milling, the radial tool intake a e should be 30% of the radius.

(3) Use high-pressure and large-flow cutting fluid to ensure the thermal stability of the machining process and prevent the workpiece surface from being denatured and tool damage due to excessive temperature.

(4) Keeping the blade sharp and blunt cutters are the cause of heat build-up and wear, which can easily lead to cutter failure.

(5) Processing in the softest state of the titanium alloy as much as possible, because the material becomes more difficult to process after hardening, heat treatment improves the strength of the material and increases blade wear.

(6) Use a large tip radius or chamfer to cut in, as much as possible into the cutting edge. This can reduce the cutting force and heat at each point and prevent local damage. When milling titanium alloys, the cutting speed has the greatest influence on the tool life vc among the cutting parameters, followed by the radial tool consumption (milling depth) ae.

3. Start with the blade to solve the titanium machining problem

The wear of the blade groove during the processing of titanium alloy precision parts is the local wear of the back and front in the cutting depth direction, which is often caused by the hardened layer left by the previous processing. The chemical reaction and diffusion of the tool and the workpiece material at a processing temperature exceeding 800°C is also one of the reasons for the formation of groove wear. Because during the machining process, the titanium molecules of the workpiece accumulate in the front area of the blade, and "weld" to the blade under high pressure and high temperature to form a built-up edge. When the built-up edge peels from the blade, the hard alloy coating of the blade is taken away. Therefore, the processing of titanium alloy precision parts requires special blade materials and geometric shapes.

4. Tool structure suitable for titanium machining

The focus of titanium alloy processing is heat, and a large amount of high-pressure cutting fluid must be sprayed on the cutting edge in time and accurately to remove heat quickly. There is a unique structure of milling cutters dedicated to titanium alloy processing on the market.