Thread rolling die for manufacturing rivet with narrow snapping groove and ring groove

Abstract

The invention discloses a thread rolling die for manufacturing a rivet with a narrow snapping groove and a ring groove. The die comprises a locking groove, a snapping groove and a tail broaching groove thread rolling plate which are of an integrated structure and are transversely arranged, and each thread rolling plate is sequentially provided with a leading-in section, a shaping section and a stripping section from the front end to the rear end; a snapping groove thread rolling tooth is arranged in the longitudinal middle of the thread rolling face of the leading-in section of the snapping groove thread rolling plate, the ratio of the height to the width of the thread rolling tooth is 0.5-0.75, thread rolling grooves are formed in the portions, on the two sides of the thread rolling tooth, of the thread rolling face, and the shaping section is composed of a front section bottom diameter shaping section and a rear section outer diameter shaping section. The thread rolling teeth facilitate easy cutting-in of workpieces, have enough strength and are suitable for thread rolling of various alloys; the groove containing structure lower than the thread rolling face is used for temporarily containing and extruding excess materials, so that the stretch-breaking groove is formed more stably, most materials remaining in the groove are gradually compressed back to the stretch-breaking groove through a pressing plate structure arranged subsequently, and the stretch-breaking groove with the extremely narrow width is formed. The thread rolling die has good machining performance and stability, the tool strength meets the requirement, and the machining efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of processing rivets of fasteners, and relates to the technology of processing dies for rivets, in particular to a thread rolling die for manufacturing narrow breakaway groove ring groove rivets. Background technique [0002] At present, ring groove rivets are widely used in various industries. Some ring groove rivets for special connectors used in high-speed rail and aviation, because their breaking grooves are narrower than ordinary-purpose ring groove rivets, the width of their breaking grooves is generally required to be About 0.5mm, or even narrower, adopting the same design structure as ordinary rivet thread rolling dies will lead to low strength of the breakaway groove mold and easy damage; therefore, the processing of existing narrow breakaway groove ring groove rivets is usually machined The processing method is to process the breaking groove. [0003] The existing conventional breakaway groove thr...

AI Technical Summary

Problems solved by technology

There is also a cutting process for the breaking groove, and the cutting process requires the addition of additional equipment, and even if the equipment has automatic feeding and clamping functions, the production efficiency is improved compared with manual operation, but compared with thread rolling, its production efficiency is still relatively high. Big difference, the speed of a single device processing the breakaway groove does not exceed 10 pieces per minute

Images