Spring bending die and bending method thereof

Abstract

The invention belongs to the spring bending technology, and particularly relates to a spring bending die eliminating steel sire springback influences in the spring bending process and a bending method of the spring bending die. Positioning pin shafts used for forming the steel wire turning radius and the turning positions are additionally arranged on a movable block. The movable block and a spring bending die body are combined in a sliding manner through a slide groove. The relative positions of the movable block and the spring bending die body are fixed through set screws. When steel wire springs are bent, the movable block is fixed to the theoretical position of the spring bending die body through the set screws, the springs are manufactured in a trial manner through steel wires, the positions of the positioning pin shafts, namely, the position of the movable block, are adjusted according to the size deviation of the springs manufactured in the trial manner, trial manufacturing is conducted again, and the process is repeated till the requirement for the sizes of the springs is met. The complex process that under a usual mode, the positions of the positioning pin shafts are preliminarily determined through calculation and reference experience values, so that the spring bending die needs to be machined again when the springs manufactured in the trail manner are not qualified after manufacturing of the spring bending die is completed is avoided; and the spring bending die manufacturing difficulty caused by steel wire springback is successfully eliminated; efficiency is improved; and cost is reduced.

Description

technical field [0001] The invention belongs to spring bending technology, and in particular relates to a spring bending mold and a bending method for solving the influence of steel wire springback in the spring bending process. Background technique [0002] When using steel wire to bend aircraft spring parts, it is necessary to design a special spring bending mold to ensure that, but due to the influence of steel wire elasticity, the steel wire will rebound after bending with the mold, resulting in the spring size being out of tolerance. In the prior art, the position of the locating pin on the special spring bending mold to locate the bending position of the steel wire is fixed at the corresponding position of the spring bending mold after calculating the rebound amount of the steel wire and the empirical value. There is an error with the empirical value, and the springback of steel wires of different sizes and materials is also very different. As a result, the position of...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the problems of large springback and difficult adjustment in the prior art, the present invention provides a spring bending mold with simple structure, convenient adjustment and effective improvement of bending efficiency.

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