The precautions for copper alloy processed products mainly include the following aspects:
Material selection and preparation: Select suitable copper alloy materials according to the actual application environment and working conditions of the parts. Different copper alloys have different physical and chemical properties, such as electrical conductivity, thermal conductivity, corrosion resistance and mechanical strength, etc., and need to be selected according to specific needs. Before processing, the copper alloy materials should be strictly inspected and pretreated, including removing the oxide scale, oil stains, impurities, etc. on the surface to ensure the surface finish and processing quality of the material.
Process control:
Temperature control: In the hot processing process such as casting, forging, and extrusion, the heating temperature and cooling speed must be strictly controlled to prevent the material from overheating, overburning, cracking or deformation.
Pressure and speed control: In the forging, extrusion and other processes, the pressure and speed must be reasonably controlled to ensure that the material is uniformly deformed, the internal structure is dense, and there are no defects.
Deformation control: During the machining process, especially in hot machining and plastic deformation machining, measures need to be taken to reduce material deformation and stress concentration to improve the dimensional accuracy and shape accuracy of parts.
Tools and cutting parameters:
Tool selection: The machinability of copper alloys is relatively good, but it is still necessary to select suitable tool materials and geometric shapes to improve cutting efficiency and machining quality. Common tool materials include cemented carbide, high-speed steel, etc.
Cutting parameter optimization: The reasonable selection of cutting parameters such as cutting speed, feed rate and cutting depth is crucial to reducing cutting force, cutting heat, improving tool durability and machining surface quality.
Cooling and lubrication:
Cooling: During the cutting process, appropriate cooling methods need to be used to reduce cutting temperature and tool temperature to prevent tool wear and workpiece thermal deformation. Common cooling methods include cutting fluid cooling, spray cooling, etc.
Lubrication: During drilling, milling and other machining processes, lubricants need to be used to reduce friction and wear, improve machining surface quality and tool durability. The choice of lubricant should be determined according to the specific processing conditions and workpiece materials.
Process optimization: For the processing of complex parts, a staged processing method can be adopted, first rough processing to remove most of the excess, and then fine processing to achieve the final size and shape requirements. This helps to improve processing efficiency and accuracy.
Surface treatment: After processing, the parts can be surface treated as needed, such as electroplating, mechanical electroplating, hot-dip galvanizing, etc., to improve the corrosion resistance and aesthetics of the parts.
