Lock washer manufacturing method and lock washer

• Main Authors: MA SHENGGE, WANG YOULIN
• Format: Patent
• Language: English
• Published: 22.04.2015
• Subjects: BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; DIFFUSION TREATMENT OF METALLIC MATERIAL; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; THERMAL INSULATION IN GENERAL; WEAPONS

The invention discloses a lock washer manufacturing method and a lock washer. The manufacturing method comprises the following steps that (1), the lock washer which is made of stainless steel and has a tooth structure is manufactured, wherein the tooth structure is that the included angle between a long edge and a short edge of the cross section of a small tooth is 80-110 degrees, the depth of the small tooth is 0.1-0.3 millimeter, the included angle between the long edge of the cross section of the small tooth and the base plane of the washer is 5-10 degrees, and the included angle A between the long edge of the cross section of a large tooth and the base plane of the lock washer is larger than the lead angle B of a matched bolt or nut by 0.1-1 degree; (2), the surface of the lock washer is processed, and a passivated layer on the surface of the lock washer is removed; (3), the lock washer after processing of the step (2) is subjected to low-temperature carburization, or low-temperature nitridation or low-temperature nitrocarburizing, and a hardened layer is formed on the surface of the lock washer; (4), the finished lock washer is finally manufactured after washing. The lock washer manufactured through the manufacturing method is good in lock effect and low in manufacturing cost.