One-time forming system of elastic strip forming machine and elastic strip forming method

Abstract

The invention discloses a one-time forming system of a spring bars former. The one-time forming system comprises an upper die, a lower die, two upper positioning posts, two lower positioning posts, a middle push arm, two side push arms, and two limb push arms. The surface of the upper die faces the surface of the lower die. The upper positioning posts are fixed above the surface of the lower die in a bilaterally symmetric manner. The lower positioning posts are fixed below the surface of the lower die in a bilaterally symmetric manner. The middle push arm is disposed above the lower die. The side push arms are symmetrically disposed on two sides of the middle push arm. The limb push arms are symmetrically disposed on two sides of the lower die and are lower than the lower positioning posts in horizontal height. The invention further discloses a forming method of spring bars. The one-time forming system and the forming method of spring bars have the advantages that one-time forming of spring bars is achieved and production efficiency is improved.

Description

technical field [0001] The invention relates to a primary forming system of a spring forming machine and a forming method of a spring, belonging to the technical field of spring production. Background technique [0002] The elastic strip is the main part of the fastening system of the passenger dedicated line, such as the W1 type elastic strip, the W2 type elastic strip, etc., and its appearance is shown in Figure 4 . The diameter of the elastic bar is about 14mm. At present, the forming process used in China is mainly three-time stamping forming, which requires three punching machines and three sets of molds. The shape of the workpiece after each forming is shown in Figure 4 , refer to Figure 4 , (a)—the shape of the workpiece after one step of forming (b)—the shape of the workpiece after the second step of forming (c—the shape of the workpiece after three steps of forming. [0003] This production process has the following disadvantages: ① There are many molding process...

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Problems solved by technology

[0003] This production process has the following disadvantages: ①There are many molding processes, affected by human factors, mold adjustments, and multiple molding positioning benchmarks, the size of the product fluctuates greatly, the consistency is poor, and the first-time pass rate of the product is low

②The punch forming speed is fast, the bar is easy to thin, and the mechanical properties of the product decrease

③There are many forming processes, and the temperature of the bar material drops a lot, which is not conducive to quenching with residual heat, and consumes a lot of energy

④Complicated molding operation and inconvenient mold adjustment

⑤There are many production processes, large investment in equipment and molds, many operators, and high production costs

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