Special positioning device for overlay welding repair of ω weld seam in the middle of crdm

Abstract

The invention relates to a special positioning device for surfacing and repairing the Ω weld seam in the middle of CRDM, which includes a circular suspension, a two-axis sliding seat mechanism, a welding torch inclination driving part, and a control mechanism. The welding torch is connected to the welding torch inclination driving part and faces always Pointing to the center line of the circular suspension, the two-axis slide mechanism is located on one side of the welding torch. The two-axis slide mechanism includes the first and second adjustment slides, the connecting plate assembly, and the driving assembly. The connecting plate assembly includes the first, The second connection plate, the first and second connection plates are connected with the first and second adjustment slides respectively, the first and second connection plates are connected and the second connection plate can be vertically connected to the first connection plate. direction adjustment. The present invention translates the two-axis sliding seat mechanism to one side of the welding torch, fully utilizes the space at the lower part of the circular suspension, and completes the reciprocating movement of the welding torch during welding through the two-axis synthetic motion; through the first and second connecting plates The up and down adjustment increases the up and down space of the welding torch, which is convenient for welding.

Description

technical field [0001] The invention relates to the field of CRDM, in particular to a special positioning device for surfacing and repairing Ω welding seams in the middle of CRDM. Background technique [0002] During arc welding, the arc voltage depends on the change of the arc length. When the arc is elongated, the arc voltage increases, and when the arc length is shortened, the arc voltage decreases. Arc voltage control Arc Voltage Control (AVC) is an adjustment method to control the voltage during arc welding, which can improve the safety and economy of system operation. [0003] CRDM Overlay surfacing repair equipment is used for argon arc welding surfacing repair of Ω sealed weld seam. The CRDM equipment includes a circular suspension 1 and a welding torch 4 connected to the lower part of the circular suspension, and the orientation of the welding torch always points to the centerline O of the circular suspension. [0004] First of all, in order to facilitate the rela...

AI Technical Summary

Problems solved by technology

However, multiple CRDM devices are usually set together, such as figure 1 As shown, the distance between the CRDM pressure-resistant shells is small, and the cross sliding mechanism 2' itself has a certain volume, so that there is no space on the annular suspension 1 to connect the cross sliding mechanism 2'

[0005] Secondly, because the welding torch 4 is connected to the bottom of the annular suspension 1, the distance from the welding torch 4 to the ground and the distance from the welding torch 4 to the annular suspension 1 are limited. When the welding torch 4 is fixed in the vertical position (The cross sliding mechanism 2' is used to adjust the displacement of the welding torch 4 during welding). If the welding seam of the workpiece is above the welding torch or below the welding torch, the narrow position will cause insufficient welding space and make welding difficult

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