Punching die for punching long screws

Abstract

The invention discloses a punching die used for punching long screws. The punching die comprises a front punching pin (1), an upper die shell (2) and a plurality of lower die shells (3). First lower semi-arc grooves (7) and second lower semi-arc grooves (8) are formed between vertical plates (6) and base plates of the lower die shells (3), the upper die shell (2) is formed by a cover plate (11) and a side plate, connecting blocks are arranged between the side plate and the cover plate (11), first upper semi-arc grooves (14) and second upper semi-arc grooves (15) are formed in the connecting blocks, a long screw head cavity can be formed by the first lower semi-arc grooves (7), the first upper semi-arc grooves (14), the front punching pin (1) and hexagonal protrusions (4), and a long screw rod cavity (18) is formed by the second lower semi-arc grooves (8), the second upper semi-arc grooves (15) and stop pillars (16). The punching die is short in die disassembling stroke and die assembling stroke, high in speed and efficiency and convenient to release, and round bars used for stamping the long screws are prevented from being bent in the punching process.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a punching die for punching long screws. Background technique [0002] In the industry, screws longer than 15 cm are generally referred to as long screws. The traditional mold used for punching long screws includes a lower mold and an upper mold. The upper end surface of the lower mold is provided with a blind hole that matches the shape of the screw, that is, the lower mold cavity. The lower end surface of the upper mold is provided with cylindrical pits. The top of the pit is provided with a hexagonal prism protrusion, and the cavity between the cylindrical recess and the hexagonal prism protrusion constitutes an upper die cavity that matches the shape of the head of the hexagon socket head screw, and the centerlines of the upper and lower die cavities coincide. Fix the lower mold, and put a round rod into the lower mold cavity. The length of the round rod is greater than the he...

AI Technical Summary

Problems solved by technology

[0003] The prior art dies for stamping long screws have the following defects: First, since the round bar needs to be placed between the upper and lower dies, it is necessary to require that the distance between the upper and lower dies must be greater than that of the round bar when the die is opened. The length of the round rod is relatively large, generally more than 15cm, which will not only lead to a larger stroke of the upper mold, but also make the opening and closing of the mold take a long time and consume a lot of energy, and more importantly, the stroke of the upper mold will be larger. , that is, the larger the stroke, the more difficult it is to ensure that the upper mold is facing the round bar when the mold is closed, and it is easy to bend the round bar during stamping, resulting in a high scrap rate; secondly, each time a long screw is stamped, it needs to be opened and loaded separately , Stamping mold closing, re-opening, demoulding five steps, as many screws need to be stamped, the above five steps need to be repeated as many times, the speed is slow, the efficiency is low, and it is impossible to stamp and form in batches; again, the demoulding process is very inconvenient, The long screw after stamping is relatively close to the mold. Generally, it is necessary to install a jacking device at the bottom of the lower mold cavity of the lower mold. Dig out from the blind hole of the lower mold, and the upper opening of the blind hole is small, the digging process is still inconvenient, and the speed is slow and the efficiency is low

Images