Pneumatic type spring fatigue life test machine

Abstract

The invention discloses a pneumatic type spring fatigue life test machine which comprises an engine base, wherein an actuating device, a regulating device and a control device are arranged on the engine base. The test machine is simple in structure and convenient and fast in testing the pneumatic type spring fatigue life. An operator only needs to fix two ends of the spring on a moving part and a fixing part, then the test machine is started, and a driving air cylinder drives the spring to move according to a set program; when the moving part touches the end part of a screw, a return circuit is communicated, a digital display is started simultaneously and counts for one time; and the driving air cylinder moves back, the moving part is separated from the screw, the return circuit is disconnected once more, counting is performed repeatedly in this way until the spring breaks and the return circuit is disconnected completely, and certain figure at which the digital display stops indicates the detection times of the spring fatigue life.

Description

technical field [0001] The invention relates to a pneumatic spring fatigue life testing machine, which belongs to the technical field of precision testing instruments. Background technique [0002] After the spring is produced, it needs to be tested by a fatigue life testing machine. The previous testing equipment uses the power mechanism of the traditional three-phase motor accelerator to test the life of the spring. It can only stretch 1 to 2 springs at a time, and for different Type of spring, the adjustment is more troublesome, and the test data is not accurate. There are also some detection equipment, such as the utility model patent with the publication number CN2781347, which discloses a spring fatigue testing machine, which uses a series of mechanisms such as a disc, an eccentric wheel, and a balance wheel to drive the spring to stretch and test. It can test multiple springs at the same time, but the equipment structure is too complicated and the cost is too high, w...

AI Technical Summary

Problems solved by technology

[0002] After the spring is produced, it needs to be tested by a fatigue life testing machine. The previous testing equipment uses the power mechanism of the traditional three-phase motor accelerator to test the life of the spring. It can only stretch 1 to 2 springs at a time, and for different Type of spring, the adjustment is more troublesome, and the test data is inaccurate

There are also some detection equipment, such as the utility model patent with the publication number CN2781347, which discloses a spring fatigue testing machine, which uses a series of mechanisms such as a disc, an eccentric wheel, and a balance wheel to drive the spring to stretch and test. It can test multiple springs at the same time, but the equipment structure is too complicated and the cost is too high, it is not suitable for mass use, and it is also not conducive to equipment management and maintenance

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