The specification of precision casting and the error of net weight and rated quantity. Under other specifications and the same location, the precision of the geometric shape comes from the two levels of mechanical casting manufacturing work and metal material application. All in all, it embodies the quality level of the entire process of precision casting production.
According to the quality inspection conclusions of precision casting, precision casting can generally be divided into three categories: qualified products, repaired products and damaged products. Qualified product means that the appearance quality and basic quality of copper precision casting meet the relevant technical requirements or the technical requirements of delivery engineering acceptance; repaired goods refer to the precision whose external quality and basic quality cannot fully meet the requirements and engineering acceptance standards. Casting, but it is allowed to be repaired and can be carried out after repair. The precision casting required in the specifications and new technology standards is used for engineering acceptance of the precision casting delivery of new projects; damage refers to the acceptance of the delivery project that is not based on the external quality and basic quality, and is not repaired or does not conform to the specifications and models and precision casting. Precision casting for technical requirements.
In order to better reduce external consumption, it is necessary to sample the mass-produced silica sol precision castings before the original, in order to carry out experimental heat treatment process and basic production processing, and to find potential precision casting defects in the factory, which is easy to use necessary precautions;
Casting is a commonly used manufacturing method. It has low production costs and great flexibility in processing technology. It can obtain complex shapes and medium and large precision castings, which occupy a large proportion of mechanical equipment.