Bending forming method for product with reversely-bent inner hook

Abstract

The invention provides a bending forming method for a product with a reversely-bent inner hook. The bending forming process has the effects that a forming process is simplified, the production efficiency is improved, the production cost is reduced, moreover, the forming process is stable, and the angle of bending and leveling can be ensured. The bending forming method for the product with the reversely-bent inner hook comprises the following steps that S01, the to-be-bent product is bent by a certain angle alpha to the back face side of the to-be-bent product to form a first flange, wherein alpha is greater than or equal to 45 degrees and less than or equal to 90 degrees; S02, the first flange is laterally pushed to be bent until an included angle beta between the first flange and the backface of the to-be-bent product is an acute angle; S03, the portion, connected with the first flange, of the to-be-bent product is bent by a certain angle gamma to the back face side of the to-be-bentproduct to form a second flange, wherein gamma is greater than 0 degree and less than 90 degrees; and S03', a portion of the first flange is leveled and reversely bent to the front face side of theto-be-bent product. According to the bending forming method, steps are simplified, before leveling and reverse bending, the first flange is a plane so that the first flange can be conveniently leveledand attached on the second flange, moreover, the reversely-bent inner hook is formed by performing one time of leveling and reverse bending, the forming process is stable, and the angle of bending and leveling can be ensured.

Description

technical field [0001] The invention relates to the technical field of bending and forming, in particular to a bending and forming method of a product with a reflexed inner hook. Background technique [0002] Some products, such as TV backplanes, have a bending structure with a reflexed inner hook, such as figure 1 The structure in the dotted line box shown in is the reflexed inner hook, which is bent on the inner wall of the product in the group. For products with a reflexed inner hook, the refolded size is small, and a bend with an inner hook is formed after refolding. [0003] In the prior art, when a product with this structure is formed, it is usually gradually formed by the outermost bending, step by step and sequentially bent and formed, such as figure 2 As shown, taking the horizontal placement of the product as an example, A, B, C, D, E, and F in the figure are the product structure corresponding to each bending step from the original state of the product before ...

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Problems solved by technology

[0004] The above-mentioned bending forming process is cumbersome, and the mold structure is correspondingly complicated; and because the reverse bending is performed from the D state, because the side has been pushed at a certain angle, when the flat side is pushed, the side push straight body area ( The flattening force area) is small, and the flattening distance is small, about 2-3mm. In the picture, h in the state E is the pushing distance, so that the flattening cannot be crushed to death, that is, the flattening part cannot be completely fitted, so The angle deviation caused by springback at the bend is also large, and the punch must be rounded

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