T/WLJC 58-2019 Correcting Wheel for Precision Grinding Discs of Chips

Scope

Scope: This standard specifies the type and specifications, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of correction wheels for wafer precision grinding discs. This standard applies to correction wheels for wafer precision grinding discs. Main technical content: In the standard name, "grinding disc" refers to the upper and lower grinding discs of a wafer double-sided grinding machine. The material of the correction wheel is gray cast iron or nodular cast iron, used for grinding the cast iron grinding disc. The shape is gear-like, with a thickness of 25-40 mm, and scraping grooves are opened on both sides. The standard gives six common structural types of correction wheels, as well as the outer diameter and thickness dimensions of six specifications, and the number of teeth and modulus of the outer ring. The dimensional tolerances specified for three key indicators of the correction wheel in the standard represent the domestic first-class and international advanced technical level. 1) The flatness of the entire working surface of the correction wheel should be ≤0.02 mm according to this standard; 2) The parallelism of the front and back sides of the correction wheel should be ≤0.005 mm according to this standard; 3) The thickness error between correction wheels in a group of four or six should be ≤0.02 mm according to this standard.

Development Information

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