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A processing method for special-shaped springs with inner and outer chamfers

A special-shaped spring and processing method technology, applied in the field of special-shaped spring machining, can solve the problems of high cost, low efficiency, difficult to guarantee the quality of chamfering, etc.

Active Publication Date: 2021-09-10
CENT SOUTH UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a special-shaped spring processing method with inner and outer chamfers for the problems of high cost, low efficiency, and difficulty in ensuring the chamfering quality of the chamfering process of the inner and outer spiral grooves of the special-shaped spring

Method used

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  • A processing method for special-shaped springs with inner and outer chamfers
  • A processing method for special-shaped springs with inner and outer chamfers
  • A processing method for special-shaped springs with inner and outer chamfers

Examples

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Embodiment

[0043] Explain the technical terms appearing in the examples.

[0044] Helical corner grooves on the outer surface and helical corner grooves on the inner surface: helical corner grooves processed on the surface of the spring blank including chamfered slopes on both sides of the spring pitch gap;

[0045] Spiral groove: A spiral groove is machined on the spring blank through the outer surface and the inner surface to form a spring pitch gap;

[0046] Helix: the midline trajectory of the helical gap on the special-shaped spring;

[0047] Spring blank: the blank workpiece before machining the spiral groove;

[0048] Spring semi-finished product: the blank workpiece after processing the spiral groove, the spiral gap formed by processing is larger than the standard spiral gap of the spring product.

[0049] see figure 1 , the variable cross-section special-shaped spring in the figure is a special-shaped spring product used in clutches. Its two ends have equal pitch, and the num...

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Abstract

The invention discloses a method for processing a special-shaped spring with inner and outer chamfers. A helical corner groove with the same trajectory as the helical line of the special-shaped spring is processed on a spring blank, and the helical corner groove includes inner and outer chamfering slopes of the helical groove of the special-shaped spring. , and then process the spiral groove along the helical line of the special-shaped spring to form a semi-finished spring, and finally shape and grind the semi-finished spring to form a finished spring. The present invention improves the entire special-shaped spring manufacturing process on the basis of special-shaped spring milling and heat treatment, and performs preprocessing of the helical corner groove including chamfering before the spring spiral groove milling process through numerical control technology, which overcomes the previous problems in the spring groove The difficulty of chamfering after milling, especially the chamfering of internal spiral grooves, the processing is more convenient, the efficiency is higher, the tool wear is small, the production cost is reduced, better processing accuracy can be obtained, and the quality and consistency of the product are guaranteed. .

Description

technical field [0001] The invention belongs to a special-shaped spring machining method, in particular to a special-shaped spring processing method with inner and outer chamfers. Background technique [0002] At present, the special-shaped springs with the characteristics of variable-section spring wire and unequal-diameter spring coils cannot be processed by the traditional rolling method. They need to be processed by milling and heat treatment. The specific processing method is as follows: CN201510054873.5 discloses a manufacturing method of a special-shaped spring. After the spiral groove of the special-shaped spring is machined, the inner and outer sides are right-angled sides. In order to avoid cracks caused by stress concentration on the side of the spiral groove, which will cause the spring to break and affect the service life of the spring, it is necessary to chamfer the side of the spiral groove. . [0003] The internal and external chamfering process of the spec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 朱楚严宏志赵林鹤文柏林明豪张慧
Owner CENT SOUTH UNIV
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