Spring grinding mechanism

Abstract

The invention relates to the field of spring grinding, in particular to spring grinding mechanism. The spring grinding mechanism comprises an upper grinding wheel, a lower grinding wheel and a grinding disc. The grinding disc is located between the upper grinding wheel and the lower grinding wheel. The upper grinding wheel or the lower grinding wheel comprises an inner grinding wheel and an outer grinding wheel, wherein the inner grinding wheel sleeves the outer grinding wheel, the inner grinding wheel or the outer grinding wheel is driven by a transmission mechanism, and the rotation directions of the inner grinding wheel and the outer grinding wheel are opposite. By the arrangement, a spring is ground under self-rotation, and the quality and yield of ground springs can be increased. In addition, the spring grinding mechanism is energy saving, environmental friendly, low in grinding cost, good in stress performance, long in mechanism precision retaining ability and good in stability.

Description

Technical field [0001] [0002] The invention involves the field of spring grinding, which refers to a spring grinding mechanism. [0003] Background technique [0004] At present, the opinions of the Basic Opinion of the two -terminal grinding spring machine of the CNC springs are figure 1 As well as figure 2 , This structure is the upper and lower sand wheel 02, the upper wheel 01 can move up and down, the two sand wheels are set on the surface of the spring 04 grinding plate 03, the grinding plate 03 set a shaft rotation, the basic working principle is: grinding plate 03 fixed axis rotation, grinding discThe spring 04 on the 03 is driven by the grinding plate 03. From point A enter the two sand wheel end surface, pass through point B to point C, come out from the end surface of the two sand wheels, the spring 04 continues to be rotated by the grinding plate 03, and passes from point C.Point D reaches point A again. In this way, the spring 04 was grinded 03 to drive the entire ...

AI Technical Summary

Problems solved by technology

Therefore, this produces three consequences: 1), only about 17% of the whole plate spring is ground on the grinding wheel plane at the same time, and the production efficiency is low

2) The grinding amount of each spring is only 17% of the downward movement of the grinding wheel on one rotation of the grinding disc, and there is still 83% of the moving amount. The spring is actually outside the grinding wheel and has not been ground, which is unreasonable. An unreasonable consequence is that because of the sudden grinding amount at point a of the grinding wheel is large, point a wears quickly, point b wears slowly, and point c basically does not participate in grinding

Therefore, the final shape of the end face of the grinding wheel becomes a truncated cone, such as image 3 , which seriously affects the vertical accuracy of spring grinding

3) Because when the two grinding wheels are grinding, only the position that coincides with the grinding disc is stressed, and the grinding amount at point a of the grinding wheel is large, that is, the main grinding force is at this place, and the axial component of the above-mentioned grinding force is combined. Therefore, the grinding wheel shaft and the grinding wheel disc have to bear a large bending moment, resulting in a large geometric deformation, which is more obvious for heavy grinding springs, which seriously affects the spring grinding accuracy

[0007] Second, due to the unevenness of the grinding wheel during grinding, the end face of the spring is actually a plane that is not perpendicular to the axis of the spring, so the spring cannot rotate during the entire grinding process from point a to point c, so the precision of the spring after grinding is not high

This is not only difficult to find such a mechanic, but also very troublesome to adjust the interference of the bearing

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