The invention provides a production process of high-strength
rivet nuts, belongs to the technical field of
rivet nut
machining, and solves the technical problem that the strength of existing
rivet nuts cannot be improved. The production process of the high-strength rivet nuts comprises the following steps that (1),
raw material spheroidizing annealing is conducted, specifically, raw materials are selected and spheroidizing annealing treatment is carried out on the raw materials; (2), upsetting forming is conducted, specifically, the raw materials subjected to spheroidizing annealing are subjected to cold upsetting to form a blank; (3), oil is removed; (4), zone annealing is conducted, specifically, zone annealing is carried out on a designated position of the blank subjected to oil removal; (5), acid
pickling is conducted, specifically, acid
pickling is carried out on the blank obtained after zone annealing through an acid
pickling solution; (6), tapping is conducted, specifically, tapping and tapping are carried out on the interior of the blank through a part
machine to form rivet nuts; (7), surface treatment is conducted, specifically, treatment is carried out on the surfaces of the rivet nuts; (8), screening is conducted, specifically, testing is carried out on the rivet nuts, and the rivet nuts with qualified strength are screened out; and (9), packaging is carried out. The production process of the high-strength rivet nuts has the advantages that the overall strength of the rivet nuts is improved, and the production efficiency is high.