Elasticity test fixture for conical washers

Abstract

The invention discloses an elasticity test tool for taper washers. The elasticity test tool for taper washers comprises an inner cone with an inner conical surface, and an outer cone with an outer conical surface, wherein the inner cone and the outer cone are opposite in the vertical direction. The conical surfaces of the inner and outer cones match with each other while the inner and outer cones have superposing axes. The inner and outer conical surfaces are provided with set taper angles equal to a taper angle of a taper washer to be tested. The inner and outer conical surfaces are peripherally provided with upper and lower positioning planes facing to each other respectively. The upper and lower positioning planes are perpendicular to the axes. A block for limiting the distance between the inner and outer conical surfaces is disposed between the upper and lower positioning planes. The vertical thickness of the block is L+(S+0.12)*sin(alpha / 2), the alpha is the taper angle of the taper washer to be tested, the S is the thickness of the taper washer to be tested, and the L is spacing of the upper and lower positioning planes when the inner and outer conical surfaces are fitted. When the upper and lower positioning planes contact with the upper and lower ends of the block respectively during test, the taper washer can be exactly compressed to be S+0.12mm high.

Description

technical field [0001] The invention relates to an elastic test tool for a tapered washer, which belongs to the technical field of mechanical fasteners. Background technique [0002] Conical washers are often used in conjunction with screws or bolts to increase the force between the screws or bolts and the threads of the connected parts, so that the screws or bolts can achieve the effect of anti-loosening. The structure of a conical washer is as Figure 4 As shown, its thickness is S, and the cone angle is 90°. The height of the conical washer is a parameter representing its elasticity. The height of the conical washer refers to the front and rear deflection of the teeth of the conical washer relative to the tooth sum of quantities. The elasticity of a tapered washer is an important criterion for measuring its performance. National standards such as GB94.2-87 stipulate an elastic test method for a tapered lock washer. This method requires that the tapered lock washer be pla...

AI Technical Summary

Problems solved by technology

This method in the prior art makes it difficult to measure and control the distance between the inner and outer conical surfaces, so it is not easy to determine whether the conical washer is compressed to a height of S+0.12mm, which brings difficulties to the elasticity test of the conical washer. inconvenient

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