Processing technique of liquid crystal television metal frame

Abstract

The invention discloses a processing technology for a metal surface frame of a liquid crystal television, which includes a bending edge processing process and a surrounding rounded corner processing process in sequence, and is characterized in that: in the bending edge processing process, an aluminum plate with an opening in the middle is fixed on the Between the concave formwork and the fixed plate, the edge of the concave mold cavity of the concave formwork is added with a circle of ribs extruded into the aluminum plate, and then the inner edge of the aluminum plate is extruded by the convex formwork to form a bending edge; in the rounded corner processing process, Three pairs of convex and concave mold insert assemblies are respectively used to bend and stamp the four rounded corners at the joints of the four straight sides on the bending edge in three steps, and the three convex and concave mold insert assemblies of the three pairs of convex and concave mold insert assemblies are The radius of the arc surface decreases in turn. The invention can punch out the bending edge with smaller fillet radius and the four rounded corners at the joints of the four straight edges on the bending edge, and can effectively prevent the occurrence of breakage at the four rounded corners during processing, greatly improving the product quality. quality.

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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