Narrow gap weld seam temperature measuring device and method

Abstract

The invention discloses a narrow gap weld seam temperature measuring device and a narrow gap weld seam temperature measuring method. The device comprises a heat conducting block, a support compression spring, a temperature measuring element, and a temperature recording instrument, wherein the heat conducting block is arranged on the top of the support compression spring; an insulating layer is arranged between the heat conducting block and the support compression spring; and the temperature measuring element is connected with the heat conducting block and the temperature recording instrument respectively. The method comprises the following steps of: (1) cleaning the temperature measuring device, and polishing the heat conducting block which is contacted with a workpiece until red copper metal color appears; (2) cleaning the temperature measuring element to make a working end have no oxidation layer; (3) connecting the temperature measuring element with the heat conducting block; (4) placing the temperature measuring device into a temperature measuring point of the weld seam, and tightly adhering the free surface of the heat conducting block to the surface of the workpiece; (5) coupling the temperature measuring element with the temperature recording instrument; (6) heating the workpiece, measuring temperature and recording a temperature value; and (7) taking the temperature measuring device out of the weld seam of the workpiece, and cleaning and saving the temperature measuring device. The narrow gap weld seam temperature measuring device has the advantages of simple structure, easy assembly and disassembly, and accurate and real-time temperature measurement, no damage to the weld seam area, and guarantee of the cleanness of the weld seam area.

Description

Technical field: [0001] The invention belongs to the technical field of workpiece heating, and in particular relates to a temperature measuring device for a narrow-gap weld and a temperature-measuring method for the narrow-gap weld. Background technique: [0002] Large-scale shaft workpieces (such as steam turbine rotor spindles) usually adopt two production methods, one is integral forging; the other is segmental forging and welding each segment into a whole. Integral forging molding requires large-scale special equipment, which has the characteristics of high cost, high technical difficulty, long production cycle, etc., and its practicability is poor. Although segmental forging overcomes the characteristics of high cost and long production cycle, it requires good welding technology, and the narrow gap weld in welding technology has better mechanical properties, lower residual stress and residual deformation, The characteristics of high welding productivity and low product...

AI Technical Summary

Problems solved by technology

Such a temperature measurement method is not only time-consuming and laborious, but also inconvenient to install and disassemble.

Furthermore, fixing the thin steel sheet by spot welding will inevitably have a serious impact on the cleanliness of the weld area, and the spot welding of the thin steel sheet is more likely to form a defect source of the welded workpiece

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