Spring performance automatic testing device

Abstract

The invention discloses a spring performance automatic testing device and a method of improving testing accuracy. A tested spring is micro pressure spring which is used in a geophone. The automatic testing device is composed of three parts, namely a mechanism structure, a transmission structure and a testing and controlling circuit. A stepping motor and a linear guide rail are vertically installed, and a pressure measurement module is horizontally installed. When a slider on the linear guide rail is driven by the stepping motor to vertically reciprocate, the slider drives a circular rotating disc to achieve automatic placement of the batch of the springs to be tested and automatic testing of the performance of the springs to be tested. The spring is compressed to the preset position by using a pressure plate which is connected with a dual closed-loop controlling driving slider, current elastic values are tested in real time by the pressure measurement module, and thereby the elastic value and stiffness factor of the spring which is at the random position within the elastic range can be accurately measured. The spring performance automatic testing device has the advantages of being high in accuracy, good in repeatability and capable of obviously improving measurement accuracy of the geophone.

Description

[0001] Involved areas [0002] The invention relates to an automatic testing device for spring performance and a method for improving testing accuracy, especially for occasions where high-precision measurement of the spring force value and stiffness coefficient at any position within the elastic range is required, such as testing the symmetry of the upper and lower plates in a geophone Performance of micro-compressed springs. Background technique [0003] Seismic detectors are widely used in oil exploration and seismic surveys. The performance of the symmetrical spring in the geophone is the main factor affecting the measurement accuracy. Most of the domestic manufacturers of geophones lack the necessary detection means, and often use empirical methods to manually screen, so that the accuracy cannot be guaranteed, resulting in poor product consistency. Or use a high-precision measuring balance to determine the maximum spring force by means of pneumatic compression. In the l...

AI Technical Summary

Problems solved by technology

Due to the problem of zero point positioning and the nonlinearity of the spring stiffness coefficient in the latter method, the error of the product is large and the repeatability is not good.

On the basis that the existing machining error cannot be improved, adopting a good detection method is the only way to improve the accuracy of the geophone

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