Seven major auto parts processing technology (5)

5.About metal cutting

Metal cutting is to use the tool to cut the metal blank layer by layer;A process that results in the desired shape, size and surface roughness of a workpiece.Metal cutting includes two methods: fitter and machine cutting. Fitter is a machining method in which workers use hand tools to cut. It is flexible and easy to operate and widely used in assembly and repair.Machining is the use of machine tools to complete the cutting, including: turning, planing, milling, drilling and grinding methods.

(1) turning: turning is the process of machining workpiece with turning tool on the lathe.Lathes are suitable for cutting all kinds of rotating surfaces, such as inner and outer cylindrical or conical surfaces, and can also turn end faces.Many of the car's shaft parts and gear blanks are processed on lathes.

(2) planing: planing is the process of machining workpiece with planer knife in planer.Planer suitable for processing horizontal plane, vertical plane, inclined plane and groove, etc.The cylinder block and cylinder head on the car surface, transmission box and cover with the plane are processed by planer.

(3) Milling: Milling is the process of machining workpiece with milling cutter on the milling machine.Milling machine can process bevels, grooves, and even machining gears and surfaces and other old milling is widely used in processing a variety of automotive parts.Milling is used for the cold stamping of automobile bodies.Computer controlled CNC milling machine can process the shape of the workpiece is very complex, is the main machine tool of modern machining.

(4) drilling and boring: drilling and boring is the main cutting method of machining holes.

(5) Grinding: Grinding is the process of machining workpiece with grinding wheel on the grinder.Grinding is a kind of finishing method, which can obtain the workpiece with high precision and roughness, and can grind the workpiece with very high hardness.Some car parts after heat treatment are finished by grinding machine.

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