The Design of Automatic System for the Calibration of Testing Temperature Cutter with Thin Film Thermocouple

Abstract:

In order to get an accurate online measurement for the transient cutting temperature in precision, in an ultra-precision cutting process,a temperature measuring device should be assessed whether it can obtain precise magnitude readings and variables of which are measured accurately. The just produced thin-film thermocouple used to measure tool cutting temperature must be correctly calibrated[3,4] , however traditional calibrating process problems rely on manual operation completely with lots of problems such as low efficiency, high labor intensity and large error. this paper proposes an automatic calibration system for thin-film thermocouple by using temperature measuring furnace, data acquisition card and computer-based software. The system makes an automatically and intelligently calibration process. By using a high-precision data acquisition card and precision amplifier circuit, eight thermocouples can be calibrated at the same time automatically which effectively shortens the calibration time and improves the accuracy. Use temperature metering furnace to control data acquisition. Secondary error from using standard thermocouple and other methods to collect the temperature metering furnace real-time temperature is eliminated. The system software modules consist of data reading, data processing, data display, database operation, data query and report generation module. The experimental results show that nonlinear fitting error is less than 0.6% within the temperature measurement range, which meets the requirement of the secondary precision of thermocouple error. This paper intends to provide a new calibration method for thermocouple temperature measurement tool development and production[7].

• Periodical: Materials Science Forum (Volumes 836-837)
• Pages: 552-561
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.836-837.552
• Online since: January 2016
• Authors: Yun Xian Cui*, Yang Qi, Li Ming Guo, Qi Xiang Zhang, Ying Jia
• Keywords: Automatic Calibration, Cutting Temperature, Seebeck Coefficient, Thin-Film Thermocouple

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