Process method for controlling welding deformation with high precision

Abstract

The invention discloses a process method for controlling welding deformation with high precision. The process method is embodied in effective control of form and location tolerance in a welding structure, and comprises a preparation stage, a positioning stage and a welding stage. In the preparation stage, a trunnion block combination and a fan-shaped block are machined and assembled respectively,and a weld groove is machined; in the positioning stage, a position of a trunnion is aligned, and then a marking device is arranged, so that the offset condition of the trunnion is conveniently detected in the welding stage; in the welding stage, welding is conducted in a symmetrical and synchronous mode, deformation conditions are monitored by means of marks and a dial indicator, and welding parameters are adjusted in real time. The process method changes the conventional process, finish machining of the two trunnion parts is firstly completed, then assembling and welding are conducted on thesame, the welding stress is made to be in a relatively low and symmetrical balance state by adopting a high-precision detection control method, a reasonable welding sequence and a flexible control means, and therefore the purposes of controlling connection deformation and guaranteeing the workpiece precision 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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