Preheating device and preheating method for TBM tool apron welding

Abstract

The invention provides a preheating device for TBM tool apron welding. The device comprises a working platform, a feeding assembly, a cantilever adjusting mechanism and a control cabinet, the feedingassembly is arranged on the working platform, and the switching of a workpiece between a welding position and a preheating position is achieved through the feeding assembly; one end of the cantileveradjusting mechanism is movably provided with an induction heating coil used for preheating the workpiece, and the other end of the cantilever adjusting mechanism is movably arranged on the control cabinet. A moving assembly is arranged on the bottom surface of the control cabinet to move the control cabinet. According to the preheating device, the effective connection of preheating, welding and post-heating procedures is guaranteed, the carrying work of workpiece at the high temperature is omitted, and the production efficiency and the welding quality of a TBM tool apron are improved. The invention further provides a method for preheating by using the preheating device, and the labor intensity of personnel can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of welding technology, in particular to a preheating device and a preheating method for TBM tool holder welding. Background technique [0002] TBM tool holders are used in harsh working environments and require high welding quality. Its thickness and weight are high, the carbon equivalent of the base metal is high, and its weldability is poor. In order to ensure the welding quality, preheating before welding and slow cooling after welding are usually adopted. The heating methods currently used mainly include flame heating and heating in a heat treatment furnace. Although the investment of flame heating is small, there are problems such as low heating efficiency, high heat loss, noise and air pollution, surface decarburization, etc., and the temperature and heating uniformity are difficult to meet the process requirements. However, it is difficult to achieve the close connection of the three processes of pr...

AI Technical Summary

Problems solved by technology

Although the investment in flame heating is small, there are problems such as low heating efficiency, high heat loss, noise and air pollution, surface decarburization, etc., and the temperature and heating uniformity are difficult to meet the process requirements

However, it is difficult to achieve the close connection of the three processes of preheating, welding and post-heating during heating in the furnace. At the same time, there are safety hazards in the hoisting and transportation of workpieces at high temperatures.

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