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Cylindrical compression spring parameter testing method

A compression spring and parameter testing technology, which is applied in the detection field, can solve the problems of low test efficiency and low test accuracy of cylindrical compression spring parameters, and achieve the effect of realizing test automation, improving test accuracy, and avoiding inconsistency

Inactive Publication Date: 2015-02-18
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a parameter testing method for cylindrical compression springs to solve the technical problems of low test efficiency and low test accuracy of cylindrical compression spring parameters in the prior art

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  • Cylindrical compression spring parameter testing method
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  • Cylindrical compression spring parameter testing method

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0027] The data acquisition software of the displacement measurement of spring and the load in the method of the present invention uses the supporting data acquisition driver software NIDaqmx of the NI PCI-6221 multifunctional data acquisition card of National Instruments Company. Such as figure 1 Shown, be the physical test model that the present invention needs to set up: comprise the oil cylinder 4-1 that frame 4-4 is arranged on the frame 4-4, have piston rod through in oil cylinder 4-1, the lower end of piston rod stretches into The frame 4-4 is connected with a pressure plate 4-2, a force sensor 3-2 is set above the pressure plate 4-2, and the measured spring 5 is placed under the pressu...

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Abstract

The invention discloses a cylindrical compression spring parameter testing method. The method includes establishing the physical connection of an industrial control computer, a hydraulic drive device, a force and displacement sensor and a data acquiring and controlling system, by means of a detecting and controlling main program of the industrial control computer, implementing software connection by the aid of drive software, a PCI and a data acquisition control system, inputting the basic information of a detected spring, removing a loading original point, establishing a displacement original point, and executing tasks, including measuring an original height and a pressurization height, drawing a rigidity curve and calculating the rigidity of the detected spring, relative to spring parameter tests automatically. After product tests, the test data can be stored, and reports can be printed. According to the method, by means of displacement triggering and load triggering, the automation level of the tests is raised, and the testing efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to a test method, in particular to a parameter test method of a cylindrical compression spring, which belongs to the technical field of detection. Background technique [0002] Constant force spring hanger is an important device for industrial pipeline support. It provides constant support as the pipe moves without placing additional stress on the piping equipment. However, its bearing force constancy largely depends on the accuracy of the parameters of the cylindrical compression spring it uses. Therefore, before assembly, the parameters of the cylindrical compression spring, such as the original free height, free height after compression and stiffness value, must be measured. This kind of measurement is generally carried out manually with a dynamometer and a ruler, and the process is cumbersome and the accuracy is not high; a more accurate method uses a general-purpose spring testing machine based on computer and sensor techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00G01B21/02
Inventor 王占军汤炳新
Owner HOHAI UNIV CHANGZHOU
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