Processing technique of liquid crystal television metal frame

Abstract

The invention discloses a processing technology of a metal face frame of a liquid crystal television, and the processing technology comprises a processing procedure of folding edges and a processing procedure of ambient round angles. The processing technology is characterized in that an aluminum sheet with a cut in the middle is fixed between a concave pattern plate and a fixing plate in the processing procedure of folding edges, wherein the edge of a concave pattern cavity of the concave pattern plate is added with a ring of pressed rib pressed into the aluminum sheet, and the inner edge of the aluminum sheet is pressed by a convex pattern plate to form the folding edge; in the processing procedure of ambient round angles, three pairs of concave-convex pattern insert block components are adopted to bend, punch and shape the four round angles at the connecting places of the four straight edges on the folding edges in three steps, and the radiuses of the arc surfaces on the three convex pattern insert blocks of the concave-convex pattern insert block components are decreased sequentially. The processing technology of the invention can press the folding edges with smaller round angle radius and the four round angles at the connecting places of the four straight edges on the folding edges, and effectively prevent rupture at the four round angles in the processing course, which improves the product quality greatly.

Description

technical field [0001] The invention relates to a processing technique for a metal surface frame of a liquid crystal television. Background technique [0002] Existing aluminum alloy LCD TV frame is usually stamped by aluminum plate, such as figure 1 As shown, the inner edge of the frame body 1 has a circle of continuous bending edges 11 that are bent to the back side and have rounded transitions. The bending edges 11 include four straight sides and four circles at the joints of the four straight sides. horn. Because in the actual use of the aluminum alloy LCD TV frame, the smaller the radius R1 of the corners of the bent edge 11 and the radius R2 of the four corners connected to the four straight sides on the bent edge 11, the more beautiful they are. Therefore, there are high requirements for the stamping process. [0003] The current processing technology of the metal surface frame of LCD TV includes the following two conventional processes: the first is the bending ed...

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Problems solved by technology

[0004] However, in the above-mentioned processing technology of the metal surface frame of the liquid crystal TV, in the process of processing the bending edge, the fillet radius R1 of the punched bent edge 11 must be at least greater than the thickness H of the aluminum plate 2 itself, so it is almost impossible to punch out the fillet The bending edge 11 with a small radius R1; taking an aluminum plate with a thickness of H=3mm as an example, the corner radius R1 of the bending edge must be greater than 3mm, which cannot meet the qualified requirement that the corner radius R1 is less than 1.5mm

In the process of processing the rounded corners around, since the processing of the four rounded corners is directly formed by a pair of matching convex mold inserts 6 and concave mold inserts 7, the aluminum plate 2 The impact is large, so that the metal material cannot be effectively extended, not only can not make a fillet with a small radius R2 (similarly taking an aluminum plate with a thickness of H=3mm as an example, the radius R2 of each fillet can only be greater than 4mm), and the rounded corners are easy to break, which directly affects the appearance of the surface frame and reduces the quality of the product

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