Steel wire creep property testing machine

Abstract

The invention provides a steel wire creep property testing machine. The testing machine mainly comprises a testing machine base, a wire fixing device, a tension sensor, a loading beam, displacement measuring sensors, a heating device and a thermostat, wherein the wire fixing device comprises an upper steel wire fixer and a lower steel wire fixer, and the upper steel wire fixer can move up and down along a guide device, so that the testing machine is suitable for testing steel wires with different length; the tension sensor is arranged above the upper wire fixer and used for detecting the magnitude of load and feeding the magnitude to a control terminal, and the stress on a steel wire is controlled to be constant by virtue of a loading system; the loading beam on a movable screw seat can be driven to move by a servo motor and exert a certain load to the steel wire; the measuring head of each displacement measuring sensor can move up and down along with the upper steel wire fixer, so that the creep of the steel wire can be tested in real time; the heating device is used for heating the steel wire and keeping constant test temperature; the thermostat can be used for maintaining a stable temperature environment during the test. The testing machine can achieve continuous loading of any load and keep a constant test stress, and the temperature of the steel wire can be adjusted intelligently; the load, the temperature and the displacement of the steel wire can be collected easily, so that the testing machine is beneficial to test research on creep of steel wires.

Description

technical field [0001] The invention relates to the field of material testing, in particular to a steel wire creep performance testing machine. Background technique [0002] To test the creep performance of steel wire, the main test is to test the relationship between the deformation of the material and the time change under the action of a certain ambient temperature and a constant external force. Most of the existing tensile or compressive creep test devices for materials use simple lever-type or hydraulic jack-type loading racks. The experimental devices are convenient and flexible to use, but it is difficult to achieve continuous loading of arbitrary loads, the test force is unstable, and the distance cannot be adjusted. Adjustment, data collection is manually recorded with a scale table, which is very easy to cause errors and other shortcomings. In addition, the commonly used material mechanics testing machine can be used for creep experiments of steel wires. Its perfor...

AI Technical Summary

Problems solved by technology

Most of the existing tensile or compressive creep test devices for materials use simple lever-type or hydraulic jack-type loading racks. The experimental devices are convenient and flexible to use, but it is difficult to achieve continuous loading of arbitrary loads, the test force is unstable, and the distance cannot be adjusted. Adjustment, data collection is manually recorded with a scale, which is very easy to cause errors and other shortcomings. In addition, the commonly used material mechanics testing machine can be used for creep experiments of steel wires. Its performance in terms of experimental force loading and data is superior, but in the material In terms of temperature control, it is difficult to achieve a constant steel wire temperature and a stable test environment

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