Compression spring with pre-pressed end and winding and detecting method of compression spring

Abstract

The invention discloses a compression spring with a pre-pressed end and a winding and detecting method of THE compression spring. The compression spring comprises a spring body, wherein gaps between the two ends of the spring body and a corresponding adjacent rings are d, and the size of a contact area of the ends and the adjacent rings is a pressing angle theta when the spring body is compressed to the designated position under stress; the pressing angle theta is an included angle formed by an indentation curve generated at the contact position of the spring end and the adjacent ring and the center position of the radian when sensing paper is used for measurement; in the winding process, a pitch of the spring body in the winding process is adjusted in time, so that the end of the spring is guaranteed to make full contact with an adjacent ring and exist after the two ends of the spring are ground; during detection, whether the end gap meets the requirement or not is judged firstly, if the end gap meets the requirement, then a pre-pressing angle is detected, so that the end and the adjacent ring are guaranteed to be tightly combined only when the end gap and the pre-pressing angle both meet the requirements. By changing the structure of the spring, the situation that a tail ring is prone to breakage after the spring is compressed due to stress is avoided.

Description

Technical field: [0001] The invention relates to the field of spring production and processing, and mainly relates to a compression spring whose end is pre-pressed and a winding and detection method thereof. Background technique: [0002] Compression spring (compression spring) is a helical spring that bears downward pressure. The cross-section of the material it uses is mostly circular. The shapes of compression springs are: cylindrical, conical, convex and concave, and a small amount of non-circular, etc. , there is a certain distance between the coils of the compression spring gap , when subjected to an external load, the spring shrinks and deforms, storing deformation energy. [0003] Valve springs generally use compression springs, which can ensure that the valves are seated in time and fit closely, and prevent the valves from jumping when the engine vibrates and damage their sealing. The installation pretightening force generated by the pre-compression of the valve s...

AI Technical Summary

Problems solved by technology

[0005] The main reason is that the uncompressed end ring of the spring collides with the adjacent ring during the movement, and if the compressed area is too small, the end of the spring will form a point-to-surface contact with the adjacent ring during the movement. Causes the spring to break

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