Manufacturing method of special-shaped spring

Abstract

The invention discloses a manufacturing method of a special-shaped spring. The manufacturing method comprises the steps of spring semi-finished product machining, spring semi-finished product heat treatment strengthening and sizing. A spring semi-finished product is a spiral workpiece with a spiral gap formed by machining larger than a spring spiral gap required by the technology. After the spring semi-finished product is machined, the spring semi-finished product is compressed through a spring compressing sizing clamp first, a sizing sheet is placed in the spiral gap of the spring semi-finished product for pressing, the thickness of the sizing sheet is equal to the special-shaped spring spiral gap required by the technology, then the spring semi-finished product is subjected to vacuum heat treatment sizing, and heat treatment comprises the steps of vacuum hardening and secondary tempering. A numerical control technique is used for being combined with heat treatment for machining a special-shaped spring, production efficiency is high, machining accuracy is guaranteed, and the production efficiency of special-shaped springs, especially section-variable special-shaped springs is improved.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a manufacturing method for processing variable cross-section special-shaped springs by combining numerical control technology and heat treatment technology. Background technique [0002] At present, the processing method of spring is mainly rolling forming method, and the equipment used is mainly automatic spring coiling machine, cutting machine, spring grinding machine and so on. Spring processing by coiling method: send the spring steel wire into the adjusted automatic spring coiling machine for spring coiling, cut off the spring steel wire at the right time according to the unfolded length of the required spring, and then perform spring broken end grinding, spring shaping, heat treatment, etc. process. However, special-shaped springs with the characteristics of variable cross-section spring wire, variable pitch, and unequal diameter spring coils cannot be processed by ro...

AI Technical Summary

Problems solved by technology

However, special-shaped springs with the characteristics of variable cross-section spring wire, variable pitch, and unequal diameter spring coils cannot be processed by rolling molding. figure 1 The special-shaped spring shown in , the characteristics of this type of variable-section special-shaped spring are: the two ends are equal pitch, the middle part is variable pitch, the inner and outer diameters of the two ends of the spring are equal and slightly larger than the inner and outer diameters of the middle part, and the inner diameter , the outer diameter changes are not equal, not synchronous, forming unequal diameter spring coils

[0003] The above-mentioned special-shaped springs with variable cross-section can be applied to products such as clutches. At present, there is a lack of an effective manufacturing method for producing such special-shaped springs with low cost and high precision.

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