stamping die

Abstract

The invention discloses a stamping die which comprises a front puncher pin (1), a lower die shell (2), and two upper die shells (3). The lower die shell (2) is formed by a bottom plate (5) and a vertical plate (6), and a first lower semi-circular-arc groove and a second lower semi-circular-arc groove (8) are formed between the vertical plate (6) and the bottom plate (5). Each upper die shell (3) is formed by a cover plate and a side plate, a first upper semi-circular-arc groove and a second upper semi-circular-arc groove are formed between each cover plate and each side plate, the first upper semi-circular-arc grooves, the first lower semi-circular-arc groove, the front puncher pin (1) and an inner hexagonal protrusion (4) can form the head portion cavity (16) of a long screw, and the second upper semi-circular-arc grooves, the second lower semi-circular-arc groove (8) and a check post (15) can form the rod portion cavity (17) of the long screw. The stamping die is short in die opening travel and in die closing travel, the round bar for stamping the long screw is prevented from being bent in the stamping process, and the stamping die is high in speed, high in efficiency and convenient to demolding.

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 punching 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, and demoulding five steps, as many screws need to be stamped as the number of times the above five steps need to be repeated, the speed is slow and the efficiency is low; again, the demoulding process is very inconvenient, long screws after stamping It is relatively close to the mold, and it is generally necessary to set up a loosening device at the bottom of the lower mold cavity of the lower mold. However, even if there is a jacking device to loosen the long screw formed by stamping, it still requires workers to remove the long screw from the blind of the lower mold. The hole is dug out, but 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

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