The automobile industry is a national pillar industry with a long industrial chain and many related industries. Therefore, improving the automobile manufacturing level can be said to be a systematic project. For the auto parts processing industry in Dalian, which constitutes the automobile, it is a typical mass production mode, and the manufacturing cost is an important link considered by the parts manufacturers.

For domestic auto parts manufacturing enterprises, on the one hand, they should compete with foreign parts enterprise groups in the market, on the other hand, they should cultivate their internal skills, improve quality and efficiency, and improve the level of parts manufacturing. In addition, we should also consider the requirements of accelerating product renewal and green environmental protection, so the processing of auto parts has become a key issue.

In the actual machining of automobile parts, the selection of cutting tools mainly considers the following factors: workpiece material, workpiece shape, machining accuracy, machining machine tool, system rigidity, surface roughness and so on. In terms of processing objects, it is mainly divided into hole parts, plane parts, shaft parts, shell parts and gear processing.

Hole processing mostly adopts multi edge compound structure (blade machine clamp and inlay welding combination), and reaming and extrusion are used instead of grinding. Finish machining the hole in the process of one-time cutting.

The milling of plane parts mostly adopts the radial and axial two-way adjustable high-speed dense tooth surface milling cutter with dense tooth, over positioning and repeated clamping structure. When milling aluminum alloy workpieces, various specifications of milling cutters with unequal tooth pitch and large axial and radial rake angles are used. The rake face of the cutter is polished. During cutting, the cutting force is small, there is no vibration and the surface quality is good.

In the processing of automobile connecting rod, the breaking process of separation surface and the plane grinding process of double side horizontal double shaft circular table are all high-quality and efficient processing processes commonly used in the production of connecting rod abroad.

The machining of automobile crankshaft main journal and connecting rod journal adopts duplex turning - broaching special tools. In addition, the outer cylindrical surface of the shaft end of some parts is machined with special tools for forming combined cylindrical milling and reaming, which can complete the rough machining of the outer circle and end face at one time, instead of the single edge turning process.

Cylindrical gear processing abroad mostly adopts multi head coated high-speed hob and radial gear shaving cutter to roll and shave, and shaving is used instead of grinding. CNC gear cutting equipment is widely used, which greatly improves the machining efficiency. Hard tooth surface cutting with cemented carbide tools has become an important research field.

Precision forging technology is widely used in the machining of spur bevel gears, and the tooth cutting technology is retained in the occasions with high precision requirements. Most spiral bevel gears are cut by NC gear milling machine, and the teeth are grinded by NC gear grinding machine after heat treatment; Matching fine assembly or NC gear milling machine is used. After heat treatment, NC gear grinding machine is used to grind teeth, which can better correct the deformation of heat treatment. Matching assembly is not allowed. Hard tooth surface scraping technology has a certain application in spiral bevel gear machining.