A kind of micro-arc surfacing welding system

Abstract

The invention relates to a micro arc overlaying system. The micro arc overlaying system comprises a workbench used for fixedly arranging workpieces. The system further comprises a rotation electrode arranged on a support. The rotation electrode is located above the workbench, and the workbench is arranged on an auxiliary vibration device with the vibration direction extending in the up-down direction in a supporting mode. According to the micro arc overlaying system provided by the invention, the rotation electrode is arranged on the corresponding support in a supporting mode, error interference caused by manual operation is avoided, and thus the contact state of the workpieces and the rotation electrode can be guaranteed. Moreover, the workbench is arranged on the auxiliary vibration device in the supporting mode, the auxiliary vibration device can be used for driving the workpieces to vibrate in the vertical direction through the workbench, and therefore the distance between the workpieces and the rotation electrode is adjusted, the contact state of the rotation electrode and the workpieces is improved, and the overlaying effect is further improved.

Description

technical field [0001] The invention relates to a micro-arc surfacing system, which belongs to the precision repair and surface strengthening technology in the field of regenerative manufacturing. Background technique [0002] The working principle of micro-arc surfacing technology is: when the electrode is in contact with the workpiece, the power supply outputs a high-energy discharge pulse, which generates a huge current density in the small area of ​​the contact point between the electrode and the workpiece, so that the electrode and workpiece material at the contact point Instantaneous melting and gasification, triggering micro-arc discharge, the material melted by the electrode transitions to the surface of the workpiece through the micro-arc to form a surfacing layer. The technology is established based on the phenomenon of electric erosion in the spark discharge process and the transfer of anode materials to the cathode during micro-arc discharge. Because the dischar...

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Problems solved by technology

[0004] In actual operation, due to manual operation of the rotating electrode in contact with the workpiece for surfacing welding, it is difficult to ensure consistent contact between the electrode and the workpiece: when the contact force is large or the surface of the electrode and the workpiece is smooth, the contact between the electrode and the workpiece The area is large, the pulse current density is small, and even micro-arcing cannot be generated; when the contact force is small or the surface of the electrode and the workpiece is rough, the contact area between the electrode and the workpiece is small, the short-circuit current density is large, and it is easy to generate spatter and form larger crater

Therefore, in the surfacing process, it is difficult to ensure the stability of the micro-arc specification, which affects the quality and surface shape of the surfacing layer, and is prone to defects such as local high points or lack of fusion. It is often necessary to manually process the surfacing surface before re- Surfacing

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