The following is a customized positioning pin product for a production transmission equipment company.

No.	Name	Process content	Use equipment
1	Turning	Use Φ 35mm column material, clamp one end, and turn the other end to the outer circle φ 24mm, length 8mm; Outer circle dimension to φ 33mm, length 9mm.	Turning
2	Turning	Clamp machined outer circle φ 24mm, outer circle of the other end of the vehicle to φ 21mm, with a guaranteed length of 32mm.	Turning
3	Precision turning	With φ 21mm outer circle positioning and clamping, and the outer circle size is to φ 20mm, 10mm long, cutting back the groove φ 18x2mm, turn the end face to ensure the outer circle size. Drill the center hole A2.	Turning
4	4 Precision turning	With φ 20mm outer circle positioning and clamping, and the outer circle size is to φ 18mm, length size 5mm, cutting back the groove φ 16x2mm, turn the end face, ensure the outer circle size, and drill the center hole A2.	Turning
5	Heat treatment	Heat treatment hardness 55 ~ 60HRC
6	Precision grinding	Position and clamp the workpiece with the center hole A2, grind and process the two shaft diameters to meet the drawing size requirements, and grind the two end faces to ensure the perpendicularity	Grinding
7	Testing	Inspect the dimensions of each part according to the drawing requirements	Pendulum, Micrometer

1.The positioning pin is used for positioning in the clamping fixture, φ 15mm and φ The vertebral body formed by 18mm plays a guiding role, and its action is repeated, so it is required to have good wear resistance. Therefore, better material T10A or 20 steel surface carburization and quenching are selected.
2.A small amount of single piece can be processed and produced by ordinary lathe.
3.In batch production, CNC lathe can be used to process one end face in large quantities and then the other end face.
4.Because this part has coaxiality and verticality requirements, A2 central hole is processed in the turning process. After the part is heat treated, the central hole is positioned, clamped and grinded, which can better ensure the accuracy requirements of the part.
5.The ratio of part diameter D to length L is relatively small, so it is not easy to deform after heat treatment, and less grinding allowance can be left.
6.The coaxiality and perpendicularity can be tested with the tools shown in the figure below or with a deflector.

This kind of relatively simple parts, we have rich technical experience, customers are very assured to give us to make.

*The cases we show here have been agreed by the customers.

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