Development of the technological process of manufacturing the part "Korpus"

Added: 23.11.2022
Size: 2 MB
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Description

1.1 Description of the design and service purpose of the part

The part "Body" according to the ESKD belongs to the 73rd class (Parts - not the bodies of rotation of the body, supporting, capacitive). The end surface of the part 140x150 has 4 through holes with a diameter of 15 mm with a positional tolerance of 0.2 mm. At the opposite end of the part there are three blind threaded holes M10-7N with a positional tolerance of 0.2 mm. It is worth noting that the part has a central, through, stepped hole, where the most accurate surfaces are surfaces intended for landing under the bearing: a surface with a diameter, on which there is a groove for the retaining ring with a width of 2.2 mm and a diameter of 103.5 mm, and a surface with a diameter, which is at the same time the base surface on it as well as on the surface with a diameter there is a groove for a retaining ring with a width of 3 mm and a diameter of 111 mm. The end surface of the part 140x150 has a tolerance of the end runout relative to the base B equal to 0.08 mm. The surface of the part with a diameter has a tolerance of cylindricity equal to 0.01 mm and a tolerance of radial the runout relative to base B is equal to 0.025 mm. The surface of the part with a diameter has a cylindrical tolerance of 0.01 mm and an tolerance of end runout relative to base B equal to 0.045 mm. Unspecified roughness of the surfaces of the part Ra = 25 μm. Surface hardness of the part 163-229 HB. General tolerances according to GOST 30893.1. The annual program for the production of parts N = 1500 pcs. The part is made of gray cast iron SCH20 GOST 1412-85, the chemical composition, mechanical properties of gray cast iron are presented in tables 1.1, 1.2, respectively.