There are multiple difficulties in the CNC machining process of titanium alloy, which mainly stem from the special physical and chemical properties of titanium alloy materials.
The thermal conductivity of titanium alloy is poor, and the cutting heat is not easily diffused during cutting, which leads to a rapid increase in tool temperature, thereby causing rapid tool wear and cracking. This not only shortens the service life of the tool, but may also lead to tool collapse during the machining process, increasing machining costs and risks.
The elastic modulus of titanium alloy is low and the elastic deformation is large, which makes the workpiece prone to rebound during the processing, increases the friction between the tool and the workpiece, and further intensifies the wear of the tool. In addition, changes in cutting pressure may also cause vibrations in the workpiece, affecting machining accuracy and surface quality.
Titanium alloy has high chemical activity and is prone to react with tool materials, leading to increased tool wear. This type of chemical wear not only affects the service life of cutting tools, but may also have a negative impact on machining accuracy and surface quality.
The cutting performance of titanium alloy is also poor, which is prone to chip accumulation and tool sticking, which may lead to an increase in cutting force and cutting temperature, further exacerbating tool wear and collapse.
To overcome these difficulties, a series of measures need to be taken. For example, selecting appropriate tool materials and cutting parameters, optimizing cutting processes, reducing cutting temperature and cutting force; Using coolant processing, vibration processing, and other methods to improve processing conditions; And reasonable design of fixtures and clamping methods to reduce vibration and deformation of workpieces during the machining process.
