Method for detecting compression height of spring

Abstract

The invention discloses a spring compression height detection method, and relates to the field of spring testing, and the method comprises the following steps: S1, detecting and recording the stress of a spring and the expansion and contraction amount of the spring when the spring is stressed, and building a rectangular coordinate system of the stress of the spring and the expansion and contraction amount of the spring; s2, the detected stress of the spring and the expansion and contraction amount data of the spring during stress are converged into a rectangular coordinate system, a relation curve of the stress of the spring and the expansion and contraction amount of the spring during stress is formed, and an inflection point with a sudden change in the shape of the curve is determined; s3, recording the expansion amount of the spring corresponding to the inflection point; and S4, subtracting the natural length of the spring from the expansion amount of the spring at the inflection point to obtain the numerical value of the compression height. The application has the effect of improving the precision of measuring the spring pressure and height.

Description

technical field [0001] The present application relates to the field of spring detection, in particular to a method for detecting spring pressure and height. Background technique [0002] A spring is a mechanical part that uses elasticity to work. Parts made of elastic materials change under the action of external force, and return to their original shape after the external force is removed. Generally made of spring steel. The types of springs are complex and diverse. According to the shape, there are mainly coil springs, scroll springs, leaf springs, special-shaped springs, etc. The compression height of the spring refers to the actual or theoretical height when the helical compression spring is pressed to the contact of each circle. [0003] In the related art, measuring the compression height of the spring is to use the theoretical compression load less than or equal to 1.5 times, and after the spring is compressed, the spring height is measured with a general-purpose m...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that because the theoretical pressure and load is a calculated value, there is a certain relationship with the helix angle and the total number of turns in the actual spring processing process, and adopts a spring pressure and height detection method in the related technology , the measured spring pressure and height has a large error with the actual spring pressure and height, and it is difficult to meet the needs of high-precision pressure and height measurement.

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