Device for testing mechanical property of material at low temperature

Abstract

The invention discloses a device for testing the mechanical property of a material at a low temperature. The lower end of a DC (direct current) motor is connected with a transmission shaft, enters a low-temperature chamber, and is connected with a vaporizer; a fan is arranged inside the vaporizer at the lower end of the transmission shaft; a cold source inlet pipe enters the low-temperature chamber from the outside and is connected with the right end of the vaporizer; an air inlet pipe enters the low-temperature chamber from the outside and is connected with the left end of the vaporizer; the lower end of a temperature controller is connected with a temperature sensor, enters the low-temperature chamber, and is arranged under the vaporizer; round holes are formed in the upper and lower ends on the left side of the low-temperature chamber; an externally-connected loading rod penetrates through the upper end lower round holes respectively; upper and lower semi-circle sealing plates are arranged at connecting positions of the upper and lower round holes and the externally-connected loading rod; and a round window is formed in the center at the top outside the low-temperature chamber. The device has the advantages of small size, simple structure, accurate temperature control, even indoor temperature, digital temperature display, and the like.

Description

technical field [0001] The invention relates to a device for testing the mechanical properties of materials, in particular to a device for testing the low-temperature mechanical properties of materials. Background technique [0002] At present, the design of most material testing machines can only be tested at room temperature or high temperature, and does not have the ability to test the mechanical properties of materials at low temperature. In this way, the temperature of the material must be lowered to the set temperature in the low temperature furnace in the laboratory. After the temperature and time are fixed, the material is loaded into the ordinary testing machine for testing. This separation of cooling and testing will cause the temperature difference between the temperature in the low-temperature furnace and the temperature during the test, which will have a great impact on the mechanical properties of the material at low temperature. The mechanical properties of t...

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Problems solved by technology

[0003] The object of the present invention is to provide a device for testing the mechanical properties of materials at low temperatures. The test device is equipped with a set of low-temperature devices for ordinary material testing machines, which overcomes the problem that existing ordinary testing machines cannot test the mechanical properties of materials at low temperatures. Defects, it is suitable for tensile, bending, shearing, fatigue and other mechanical performance tests of materials at low temperatures (0°C~??180°C). The device uses a temperature controller to display the low temperature indoor temperature during the test, and the minimum resolution is 0.5°C (0.5°C)

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