Titanium alloy material cutting processing difficulties - large cutting force

As we all know, usually the higher the hardness and strength of metal materials, the greater the cutting force required for cutting, the higher the cutting temperature, the faster the tool wear, so the relative machinability is worse. For example, the relative machinability coefficient of aluminum alloy is 2.0 ~ 7.5, high-strength steel Kr is 0.3 ~ 0.7, titanium alloy Kr is 0.22 ~ 0.35, and aviation high-strength superalloy Kr is only 0.07 ~ 0.3. Therefore, compared with the cutting of light metal materials such as aluminum alloy, the cutting of titanium alloy requires greater cutting force, usually nearly 1,000 to thousands of cows (Newton, N), which is 2 to 4 times that of ordinary steel and 10 to 40 times that of aluminum alloy. For example, a 4-tooth 32mm diameter end mill, cutting depth of 19mm, at 20 cm3/min metal removal rate when cutting titanium alloy will produce 4,445N (1,000 lbs) load, if the tool wear 50%, the load will increase to 8,890N. Therefore, the processing of hard alloys such as titanium alloys requires large cutting forces, which means that a high torque spindle is required, or it means that only a lower cutting speed is allowed to be used, about 10% of that of aluminum alloys.