Thermal bimetallic thermal bending test

Thermobimetal is a composite material consisting of two or more layers of metal, usually made into sheets or strips. The hot bimetal hot bending test can determine the bimetal specific bending, temperature curvature and bending constant.
Zhongke Testing Reliability Experiment Center has the capability to test the reliability performance of various metal materials and provides professional thermal bending test services for thermal bimetals.

The hot bimetal specific bending test method is suitable for measuring the specific bending properties of hot bimetallic strips with a thickness of 0.60 mm~1.25 mm and a temperature of 20°C~130°C.
Thermal bimetal thermal curvature test method is suitable for determining the thermal curvature of straight thermal bimetals with a thickness of 0.30 mm ~ 1.25 mm and spiral thermal bimetals with a thickness less than 0.30 mm.
The thermal bimetal bending constant test method is suitable for measuring the bending constant of thermal bimetal straight strip specimens with a thickness of 0.25 mm~1.20 mm and a measurement temperature range of room temperature to 100°C.

1. Hot bimetal ratio bending test:
The hot bimetal ratio bending test method adopts the cantilever beam method. A closed loop is composed of the specimen, specimen holder, displacement measuring rod and electronic contact indicator. According to the basic characteristics that the curvature of the thermal bimetal changes with temperature, the sample and the displacement measuring rod are used as a closed circuit switch to measure the displacement-deflection change of the free end of the sample.
2. Thermal bimetal temperature curvature test:
The thermal bimetal sample is placed on two conical supports separated by a certain measurement length, the relationship between the displacement of the sample measurement point and the temperature change is measured, and the temperature curvature is obtained through calculation.
3. Hot bimetal bending constant test:
The thermal bimetal bending constant test method adopts the cantilever beam method. A closed circuit is composed of the specimen fixture, specimen, electronic indicator and displacement measuring device. Adjust the micrometer of the displacement measuring device at room temperature. The measuring rod is in contact with the free end of the sample surface. The electronic indicator sends out a signal. The sample whose curvature changes with temperature is used as a switch to close the circuit to measure the deflection change of the free end of the sample.

GB/T 8364-2008 Thermal bimetal thermal bending test method
GB/T 4461 Thermal bimetal strip
JB/T 9551 Test method for thermal deflection rate of thermal bimetallic spiral components