I. Preparation before processing
Material selection: TC21 titanium alloy bar or plate as processing raw materials, need to ensure that its chemical composition and physical properties in line with the standard requirements.
Tool preparation: according to the processing requirements, select the appropriate machine tools, cutting tools, fixtures and so on. For TC21 titanium alloy, it is recommended to use cemented carbide tools or diamond tools to ensure the machining efficiency and tool life.
Process planning: according to the part drawings and machining requirements, develop a detailed machining process route, including cutting, turning, drilling, milling, grinding and other processes.
Second, the main processing technology
Cutting
Method: Use machine tools or titanium alloy special cutting machine for cutting.
Precautions: Control the cutting speed and coolant flow to avoid overheating leading to material deformation or cracks.
Turning
Method: Use carbide tools for turning, keep the tool sharp.
Parameter control: Control the machining speed and cutting depth to avoid excessive cutting or overheating.
Effect: Ensure the finish and precision of the machined surface.
Drilling
Method: Use high speed drill to drill holes.
Precautions: Ensure the drilling speed and the flow and quality of coolant to prevent thermal shock cracks in titanium alloy.
Milling
Method: Milling with high-speed tools.
Parameter control: Control the milling speed and depth of cut to maintain the sharpness and finish of the tool.
Effect: Improve machining efficiency and surface quality.
Milling
Method: Grinding with grinding wheels and abrasives.
Purpose: To further improve the finish and precision of the machined surface.
Special Machining Technology
Wire cutting: For titanium alloy parts with complex shapes, electric pulse wire cutting machine is used for processing.
Laser cutting: Precision processing using laser cutting machines, especially for thin plate materials.
EDM: Precision machining with EDM machines allows for the manufacture of small, high-precision parts.
Third, heat treatment and post-treatment
Heat treatment: TC21 titanium alloy may require heat treatment during processing to improve its mechanical properties and microstructure. Common heat treatment processes include solution treatment and aging treatment.
Post-treatment: including cleaning, deburring, painting and other processes to ensure the surface quality and aesthetic appearance of the parts.
Fourth, the processing process of attention
Temperature control: processing needs to be strictly controlled temperature, to avoid overheating lead to material performance degradation or deformation.
Optimization of cutting parameters: reasonable selection of cutting speed, depth of cut and feed and other parameters, in order to improve processing efficiency and processing quality.
Tool management: Regularly check the tool wear and replace the badly worn tool in time to ensure the machining accuracy and surface quality.
Safety protection: necessary safety protection measures should be taken during the machining process, such as wearing protective glasses, wearing protective clothing, etc., to prevent cutting splash injury.
In summary, the machining technology of TC21 titanium alloy involves many aspects, including preparation before machining, main machining technology, heat treatment and post-treatment, as well as precautions in the machining process. By reasonably selecting and controlling these technologies and parameters, it can ensure that the processing quality and performance of TC21 titanium alloy parts meet the design requirements.
