A thermocouple positioning device for thermal process equipment and its accuracy verification method

Abstract

The invention discloses a thermocouple positioning device for thermal process equipment, which comprises a chassis, which is installed on the thermal process equipment, and at least two test holes communicating with the interior of the thermal process equipment are arranged on the chassis; and several positioning plates with different heights , at least two limit holes are arranged on the positioning disc corresponding to the test holes. The invention also discloses a method for checking the accuracy of thermal process equipment. The test couple and the calibration couple are respectively inserted into the thermal process equipment through the limit hole of the positioning plate and the test hole of the chassis, and are determined according to the positioning plate. The insertion depth of the thermocouple; and after being heated by the thermal process equipment, the temperature measuring instrument of the thermal process equipment, the calibration couple, and the test data of the test couple are compared, and the accuracy of the temperature measurement system of the thermal process equipment is verified and its accuracy Validation method.

Description

Technical field [0001] The present invention relates to the field of thermal process control equipment, and particularly relates to a precision positioning apparatus thermocouple calibration method for a thermal process equipment. Background technique [0002] System accuracy calibration of thermal processing equipment, is set by the test system with a test meter and test sensors, the working and working sensor system for checking the composition of the working instrument to reflect the accuracy of the temperature. To check the accuracy of the system involves heat treatment, surface treatment, re-bonding material, hot forming, hot forging process almost all casting equipment and the like, and therefore are widely used in the manufacturing of the thermal processing. Calibration system accuracy is an important and indispensable technique. [0003] The method of checking the accuracy of the current system is as follows: When the verification period expires, stop production, the test...

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Problems solved by technology

[0004] There are three problems in this method of operation: (1) Energy waste: In order to perform system accuracy verification, the thermal process equipment needs to be in an empty furnace state, and it will take at least half a day to heat up again after the system accuracy verification is completed, not only Waste of electric energy also affects the normal production schedule; (2) Poor test accuracy: the test thermocouple for system accuracy verification should be placed as close as possible to the process thermocouple, and at the same orientation and depth as the initial calibration, The general operation method cannot guarantee the realization of this regulation, so the accuracy of the system test is poor, and it cannot accurately reflect the real working status of the thermal process equipment; (3) There are hidden dangers affecting the temperature control: during the installation process of the test thermocouple, it is very likely It will cause the displacement of the process thermocouple, especially the change of the position of the control thermocouple will cause the change of the temperature field. When the control couple is placed in a temperature-sensitive area, a small displacement of the control couple may cause the temperature field distribution of the equipment to be relatively poor. Large changes lead to poor hardness and electrical conductivity of parts, and even parts are over-burned and scrapped

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