Flanged bottom hole structure and electric appliance shell

Abstract

The invention provides a flanged bottom hole structure and an electric appliance shell. The flanged bottom hole structure comprises a plate body, wherein a trepanning region of the plate body is bent towards one side of the plate body to form a concave cavity, wherein the opening of the concave cavity faces the other side of the plate body, and the concave cavity is matched with a self-tapping screw; and the self-tapping screw can be screwed into the concave cavity from the open end of the concave cavity and can penetrate through the trepanning region, so that the trepanning region is expanded towards the periphery. According to the flanged bottom hole structure, waste materials are not prone to being generated in the machining and manufacturing process of the flanged bottom hole structure, so that the bad phenomenon of the surface of the plate body is not prone to occurring; and the flanged bottom hole structure has the advantages of being simple in structure and convenient to machine and manufacture, and can improve the sealing performance and reliability after being connected with a self-tapping screw in a matched mode.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of February 28, 2018, an application number of 201810166198.9, and an invention title of "Flanged Bottom Hole Structure and Electrical Housing". technical field [0002] The present invention relates to the field of household electrical appliances, in particular to a flanged bottom hole structure and an electrical appliance housing with the flanged bottom hole structure. Background technique [0003] At present, the existing film-coated panels include VCM (Vinyl chloride monomer, vinyl chloride) steel plates, VCM steel plates use steel plates as the base material, and the film is PVC (Polyvinyl chloride, polyvinyl chloride) layer, PET (Polyethyleneterephthalate, polyparaphenylene) The multi-layer composite board of ethylene glycol diformate) layer and printing layer has the advantages of corrosion resistance, friction resistance, beautiful appearance, gorgeous color, v...

AI Technical Summary

Problems solved by technology

[0004] related technologies, such as Figure 1 to Figure 3 As shown, after punching and blanking the hole area 104 of the film-coated plate 1022, the flanged bottom hole 110 that can be matched with the self-tapping screw 200 is formed, because the flanged bottom hole 110 partially falls off when the punching bursts. , partially remaining, the film 106 is easy to fall off from the base material under the action of high temperature generated by high-speed stamping, and together with the punching waste 108 of the base material, randomly adheres to the surface of the film-coated plate 1022, resulting in easy crushing of the parts in the subsequent process , so it is easy to cause poor surface of the film-coated board 1022

Due to the existence of more flanging and bottom holes 110 on the film-coated board 1022 used in the above-mentioned household appliances, there are problems such as high scrap rate and low production efficiency in actual production, especially in the field of electrical appliance casings, due to the There are a large number of flanging and bottom holes 110 on the housing box (namely, the film-coated board 1022), which makes the box of the electrical appliance housing easy to be scrapped during processing and manufacturing.

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