Dense hole punching mold and punching method

Abstract

The invention relates to a dense hole punching mold and a punching method. The mold comprise an upper mold and a lower mold, wherein the lower mold comprises a lower mold plate used for containing a to-be-machined product, the upper mold comprises an upper mold base, an upper stripper plate and a punch, wherein the upper stripper plate and the punch are arranged below the upper mold base; and an upper stripper plate insert is arranged on the upper stripper plate, a stepped hole which an blade end of the punch penetrates through is formed in the upper stripper plate insert, the blade end of thepunch penetrates out of the stepped hole, and a rod part is left in the upper stripper plate insert. According to the method, the metal sheet with the different sizes of the dense holes can be machined, and no surface coating limitation exists; when the dense hole of the metal sheet has the appearance requirement, the dense hole machined by the mold is small in burr and free of black edges, the flatness of the whole piece is good, the hole distance and the hole diameter are small, and the visual feeling after hand feeling and illumination can be guaranteed; and in addition, the dense hole machining is realized by blanking of the mold, the mold and the method have the advantages of being high in a material utilization rate, high in production efficiency, environmentally friendly, and freeof pollution.

Description

technical field [0001] The invention relates to a die, in particular to a dense hole punching die and a punching method. Background technique [0002] In the prior art, most of the realization methods for processing dense holes are chemical corrosion. By making a chemical model, the chemical liquid reacts with the thin plate metal, and the metal dissolves in the acidic liquid, thereby forming small holes one by one. However, this method The production efficiency is low, which cannot meet mass production, and the chemical waste produced will pollute the environment. If the product has appearance requirements, the metal sheet is often covered with a film, which cannot be achieved by chemical corrosion again. [0003] Another method is to use laser laser processing, put the metal sheet on the laser table, the laser head emits a high-energy beam, the beam is perpendicular to the sheet, instantly generates high temperature at the irradiation point, and liquefies in the small meta...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, most of the realization methods for processing dense holes are chemical corrosion. By making a chemical model, the chemical liquid reacts with the thin plate metal, and the metal dissolves in the acidic liquid, thereby forming small holes one by one. However, this method The production efficiency is low, which cannot meet mass production, and the chemical waste produced will pollute the environment. If the product has appearance requirements, the metal sheet is often covered with a film, which cannot be achieved by chemical corrosion again.

[0003] Another method is to use laser laser processing, put the metal sheet on the laser table, the laser head emits a high-energy beam, the beam is perpendicular to the sheet, instantly generates high temperature at the irradiation point, and liquefies in the small metal hole. After cooling, The small metal sheet in the round hole is separated from the surrounding of the hole to realize the small hole, but there is a defect in the production of this method. There are small particles after melting and cooling around the small hole, which is not smooth to the touch by hand and has black edges on the outside. Affect the appearance

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