Welding thermal cycle curve test device and application method thereof

Abstract

The invention discloses a welding thermal cycle curve test device and an application method thereof. The welding thermal cycle curve test device is characterized in that a workpiece to be tested is placed at the upper opening of a support frame; a thermocouple is clamped on a clamping device; a driving device is used for driving a tightening device to move towards the upper opening of the supportframe, so that the measuring end of the thermocouple is pressed against the workpiece to be tested; and the driving device can be used for tightly pressing the measuring end of the thermocouple against a position to be tested of the workpiece to be tested, so that the thermocouple is prevented from deviating from a desired position in the welding process; the temperature measuring point is real and reliable; operation is easy and convenient; the thermocouple and a test board have good contact performance; and the test accuracy is improved. Through adoption of the device, radiation of arc lightto the human body is avoided. Moreover, the welding thermal cycle curve test device has the advantages of simple structure, and convenience in use and maintenance.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a welding thermal cycle curve testing device and a using method thereof. Background technique [0002] Welding is a rapid prototyping method for splicing simple parts into complex parts or components through local melting or mutual diffusion at the joints. It is widely used and has penetrated into various production fields. [0003] Welding technology is widely used in various production fields because of its simple operation and fast realization of a firm connection between components. The influence of welding thermal cycle on the microstructure and performance of the heat-affected zone is very important. The reliability of the welded component connection is a prerequisite for the safe use of the product. Under the condition of a reasonable component design, the safety and reliability are guaranteed by the welding quality. The welding quality It mainly depends on t...

AI Technical Summary

Problems solved by technology

However, the above two methods have their own advantages and disadvantages: the non-contact thermal imaging method can measure the surface temperature at a long distance, the measurement position is flexible, and it can effectively avoid the radiation of the arc light to the human body, but it can only measure the surface temperature of the object, and the measurement equipment Expensive, complex equipment and difficult maintenance, and because the imaging speed cannot meet the temperature change rate of the welding thermal cycle, the test results are often different from the actual welding thermal cycle; and the traditional thermocouple method needs to bury the thermocouple deep in the welding The inside of the test plate needs to be drilled to a certain extent, the operation is heavy, the test equipment is relatively backward, and the joint between the thermocouple and the test plate cannot be observed, and the measurement position of the test area is difficult to control, resulting in a low measurement success rate

To sum up, in the welding thermal cycle curve measurement experiment, the effective contact between the thermocouple and the test plate must be guaranteed throughout the experiment process. In the experiment, the thermocouple usually deviates from the expected position during the welding process, and the final measurement result is The temperature of the nearby air or the air temperature near the test point, causing the experiment to be repeated continuously

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