Thermal shock test machine temperature change, temperature cycle, temperature alternating, rapid temperature change, temperature shock, thermal shock, temperature gradient, stage temperature

There are two methods of thermal shock test: gas method and liquid method thermal shock test machine

There are two ways to achieve the gas method, one is manual conversion, the product is converted between the high temperature box and the low temperature box; The other is the impact test chamber, which realizes temperature conversion by switching the circulation damper of the cold and hot chamber or other similar means. The upper limit and lower limit of temperature are the storage limit temperature of the product.

The liquid method is implemented in the hanging basket type, and the product is placed in the hanging basket and immersed in the liquid at different temperatures according to the requirements. It is suitable for glass-to-metal seals and similar products.

 The thermal shock test is an accelerated test that simulates a large number of slow temperature cycles in a vehicle. According to the actual vehicle temperature cycle, acceleration is feasible with faster temperature change rate and wider temperature range. Failure modes are material cracking or seal failure due to aging and different temperature expansion coefficients. This test will result in mechanical defects (cracks) and does not require live work.

For rapid temperature changes in a specific time, the conversion time is generally set to 2 to 3 minutes manually, less than 30 seconds automatically, and less than 10 seconds for small specimens. The temperature shock test in common terms is also a cold and thermal shock test.

This test has several important parameters to consider: number of cycles, temperature conversion time, temperature holding time, temperature limit value (therefore, this test is a storage test, so its limit value is the storage limit temperature value). The reference parameter Settings are shown in the table, and the specific cycle number comes from an empirical value calculated by the acceleration model.