Automatic Forming Method of Scroll Spring

Abstract

The invention discloses an automatic forming machine of a vortex coil spring. The automatic forming machine comprises a wire conveying wheel group for conveying a wire along a first direction, a rotatable mandrel located in front of the wire conveying wheel group in the first direction, an upper cutter located on one side of the rotatable mandrel to cut off the wire, a first curve gauge and a second curve gauge which are used for forming a main body part of the vortex coil spring, hydraulic scissors for scissoring a redundant part of an inner hook of the vortex coil spring after the inner hook is formed, and a lower cutter which is distributed on the other side of the rotatable mandrel in a manner of being opposite to the upper cutter, wherein the upper cutter, the first curve gauge, the second curve gauze, the hydraulic scissors and the lower cutter are annularly distributed around the rotatable mandrel in sequence. The automatic forming machine of the vortex coil spring further comprises a high-frequency heating furnace which is controlled by a pneumatic device to move to a position in front of the rotatable mandrel to heat the wire part of the inner hook of the vortex coil spring. The high-frequency heating furnace of the automatic forming machine of the vortex coil spring independently realizes induction heating, and only heats the wire part for forming the inner hook, so that the efficiency is improved, and the influence on a microstructure of a material due to frequent heating can be further avoided.

Description

Technical field [0001] The invention relates to an automatic forming equipment, in particular to an automatic forming method of a spiral spring. Background technique [0002] At present, there are several ways to form the scroll spring for the tensioner: [0003] 1. The special machine developed by the company: select a special mandrel according to the spring, and the hooks at both ends are manually bent and then formed on a special machine. This type of molding method has low production efficiency, long product development cycle, and needs to control the pitch through cloth belts or steel bars. [0004] 2. Automatic molding machine: The molding principle is the same as that of a special machine, and a special mandrel and matching tooling are also selected, but it can be molded at one time and has higher efficiency. This type of forming method has the following disadvantages: a) Both the inner hook and the outer hook need to be formed by induction heating, which reduces the efficie...

AI Technical Summary

Problems solved by technology

This type of forming method has the following disadvantages: a) Both the inner hook and the outer hook need to be formed by induction heating, which reduces the efficiency; b) For large-scale scroll springs, because the inner hook is too short, it cannot meet the forming requirements ; c) Stamping is mostly used for forming outer hooks, and the replacement of products is not flexible enough; d) Control of pitch and flatness is not good enough

[0005] It can be seen that there are still many defects in the existing automatic forming method of scroll springs, which need to be improved.

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