Process for high precision control of welding deformation

Abstract

The present invention discloses a process for high precision control of welding deformation, the process is embodied in the effective control of the form and position tolerances in a welding structure, and the process comprises a preparation stage, a positioning stage and a welding stage. The preparation stage comprises: performing the processing and assembling respectively for a trunnion block assembly and a fan-shaped block, and processing weld grooves; the positioning stage comprises: aligning the position of a trunnion in a positioning stage, and arranging a marking device in order to check the deviation of the trunnion in a welding stage; and the welding stage comprises: conducting welding in a symmetric and synchronous manner, monitoring the deformation by use of marks and a dial indicator and adjusting the welding parameters in real time. The present invention changes conventional processes: firstly fine finishing is completed for two trunnion parts, then assembling and weldingare performed; by use of a high-precision detection control method, a reasonable welding sequence and flexible control measures, welding stress is kept relatively low and symmetrical, and thus the purposes of controlling welding deformation and ensuring the workpiece accuracy are achieved.

Description

technical field [0001] The invention relates to the technical field of welding methods, in particular to a process method for controlling welding deformation with high precision. Background technique [0002] The support ring is an important part used to support the ladle, rotate around the trunnion, and realize the dumping of molten steel to complete the steelmaking operation in the steelmaking process. The composition of the support ring mainly includes a ring-shaped main body composed of two trunnion blocks and two fan-shaped blocks connected together. The combination of the two trunnion blocks and the two fan-shaped blocks are arranged at intervals. trunnion on piece trunnion block. [0003] The trunnion is a support used to assemble the bearing and realize the rotation around the axis. If the coaxiality requirements of the two trunnions cannot be guaranteed, it is easy to cause damage to the equipment or even cause an accident under the condition that the support ring...

AI Technical Summary

Problems solved by technology

However, the size of the support ring is very large, the diameter is generally more than 7 meters, the height of the fan-shaped block 102 is more than 2 meters, the thickness of the upper and lower cover plates of the box is more than 100mm, and the thickness of the arc side plates inside and outside the box is more than 60mm. , the total weight is generally more than 40 tons. With such a huge volume and weight, common machine tools cannot complete the one-time processing of the trunnion to ensure the coaxiality requirements.

If the two trunnions are processed separately, it is difficult to ensure the coaxiality of the trunnions

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