Precision parts processing process requirements

When the precision parts in the metal processing equipment processing is completed, what are the following process? What are the precautions in each process? Parts contour processing: 1, not marked shape tolerance should meet the requirements of GB1184-80. 2, not marked length size allowable deviation 0 ...

When the precision parts in the metal processing equipment processing is completed, what are the following process? What are the precautions in each process?

Contour processing of parts:

1, not marked shape tolerance should meet the requirements of GB1184-80.

2, not marked length size tolerance ± 0.5mm.

3, not marked fillet radius R5.

4, did not note chamfer are C2.

5, acute angle blunt.

6, sharp edge blunt, remove edge burrs.

Parts surface treatment:

1, parts processing surface, there should be no scratches, scratches and other defects on the surface of the parts.

2, the processing of the threaded surface does not allow black, bump, chaos buckles and burrs and other defects. All surfaces of steel parts to be painted must be removed of rust, scale, grease, dust, dirt, salt, dirt, etc. before painting.

3, rust before the first use of organic solvents, lye, emulsifiers, steam etc. be removed from steel parts surface to remove grease, dirt.

4, by shot peening or manual derusting of the surface to be coated and primed no more than 6h.

5, riveting contact with each other on the surface, before the connection must be coated with a thickness of 30 ~ 40μm rust paint. Lap edges should be painted, putty or adhesive closed. Due to processing or welding damaged primed coating, to re-coating.

Heat treatment of parts:

1, the quenched and tempered, HRC50 ~ 55.

2, medium carbon steel: 45 or 40Cr parts for high frequency quenching, tempering 350 ~ 370 ℃, HRC40 ~ 45.

3, carburizing depth: 0.3mm.

4, high temperature aging.

      The technical requirements after finishing:

1, finishing parts shall not be placed directly on the ground, should take the necessary support and protection measures.

2, the processing surface does not allow rusting and property enfluence, life or appearance bump, scratches and other defects.

3, the surface of the finish rolling, do not allow peeling phenomenon.

4, the final process after heat treatment of parts, the surface should not have oxide. finishing mating surface and the tooth surface should not be annealed

Sealing of parts:

1, the seal must be saturated with oil before assembly.

2, before the assembly, strictly check and clear the parts existing processing acute angle, burrs and foreign matter. Make sure the seal is not scratched when it is loaded.

3, the adhesive should be removed after the excess adhesive.