Precision metal parts machining is a high-precision manufacturing process that shapes precision metal surfaces through the use of abrasives and mechanical operation. It mainly uses metal polishing solution with abrasive discs made of various materials to polish, and different products made of different materials need to choose different polishing solutions, such as silicon carbide polishing solution, aluminium oxide polishing solution, glass polishing solution and so on. Mechanical polishing is the most rapid and environmentally friendly way of polishing, polishing products are easy to clean, is the preferred way of precision polishing.

The steps of precision metal parts machining include preparing the workpiece, adjusting the equipment, clamping the workpiece and grinding the end face. In the machining process, it is necessary to master basic mathematical knowledge, CAD/CAM software technology, etc. to ensure machining accuracy.

When selecting machining tools, it is necessary to choose the appropriate tool according to the material and hardness of the part. For example, for hardness less than HRA90 cemented carbide parts, choose BNK30 material CBN tools for large margin turning; for hardness greater than HRA90 cemented carbide parts, generally choose CDW025 material PCD tools or use resin bonded diamond grinding wheel for grinding.

The key steps in precision metal parts processing include mould design and manufacturing, material preparation and melting, injection and cooling, counterpressure and demoulding, surface treatment and subsequent processing. In the precision parts machining of cemented carbide for grooves above R3, it is usually rough machined with CBN tools made of BNK30 first, and then ground with grinding wheels.

Precision metal parts machining is widely used in automotive, electronics, aerospace and other fields, continuous innovation and development will bring more possibilities for product manufacturing.