Dense hole machining mold of air duct cover plate and machining method

Abstract

The invention relates to a dense hole machining mold of an air duct cover plate and a machining method. The mold comprises an upper mold and a lower mold, wherein the lower mold comprises a lower moldplate used for containing a to-be-machined product, the upper mold comprises an upper mold base and a punch arranged below the upper mold base; and a waste transferring and connecting box is arrangedat the bottom of the lower mold base, a waste outlet is formed in the lower mold plate, a waste inlet of the waste transferring and connecting box communicates with the waste outlet of the lower moldplate, and the outlet of the waste transferring and connecting box is connected with a dust collector. 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, theflatness 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 free of pollution.

Description

Technical field [0001] The invention relates to a mold, in particular to a mold for processing dense holes of an air duct cover plate and a processing method. Background technique [0002] In the prior art, most of the methods for processing dense holes are chemical corrosion. By making chemical models, the chemical liquid reacts with the sheet metal, and the metal is dissolved in the acidic liquid to form small holes. But this method The production efficiency is low, which cannot meet mass production, and the chemical waste generated will also pollute the environment. If the product has appearance requirements, the metal sheet often needs to be covered with a film, which cannot be achieved by chemical corrosion again. [0003] Another method is to use laser processing to place a thin metal plate on the laser table. The laser head emits a high-energy beam. The beam is perpendicular to the thin plate, and high temperature is instantly generated at the irradiation point. The metal is...

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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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