Quality improvement and upgrading the shaft sleeve

Quality improvement and upgrading the collar - 2018 08 - 07 DE shi company quality management department yong-sheng cao, project problem of DZ9X259690020 collar construction drawings for phosphating surface treatment way, phosphating is mainly for the purpose of the matrix metal protection, form a thin layer of phosphate film on the surface of the matrix, but the film antirust ability is very limited, placed in the warehouse for a period of time, or in wet air, acid seep slowly, will result in artifacts of rust. Delivery inspection, but feedback is rust phenomenon when assembly and assembly. Second, improve thinking and innovation: to DZ9X259690020 collar to change the way of surface treatment, use galvanized and electrophoresis, comparing the two ways and ensure that size in the range of tolerance, by contrast, electroplating products cost big, color does not match the phenomenon after assembly. After the discussion, decided to change the surface treatment to electrophoresis paint ( TQ6) By fitting, eliminate unqualified phenomenon, also does not appear in the process of assembly assembly difficult phenomenon. Three, to improve the effect: after the rectification of qualified products, conform to the requirements of the drawings, assembly and no feedback, to reduce the repair cost.