Method and device for induced localized electrodeposition on back side of thin-walled workpiece through laser irradiation

A method for repairing the inner wall of the material through the localized electrodeposition by using the hybrid laser-electrochemical technology, wherein

• the method repairs a workpiece using a laser and an electrochemical reaction,
• a tool anode is arranged in a center of the workpiece, the tool anode is spaced from the workpiece, and a laser beam is focused on an outer surface of the workpiece to locally repair the inner wall, and the method comprises the following steps:
• step 1:
• drawing a motion path model according to graphics of a region to be repaired, and optimizing and importing the motion path model into a computer;
• step 2:
• pretreating an inner surface and the outer surface of the workpiece to be repaired;
• step 3:
• connecting the tool anode to a positive electrode of a direct-current pulse power supply and connecting the workpiece to be repaired to a negative electrode of the direct-current pulse power supply;
• step 4:
• immersing the inner surface of the workpiece to be repaired and the tool anode in an electrodeposition solution, turning on the direct-current pulse power supply to form an electrochemical circuit between the workpiece to be repaired and the tool anode, and turning on a peristaltic pump to ensure a uniform concentration of the electrodeposition solution during the electrochemical reaction;
• step 5:
• turning on a pulsed laser, so that the laser beam emitted by the pulsed laser is focused and irradiated on the outer surface of the workpiece to be repaired and a heat generated by the laser is transferred via a thermal conduction to the region to be repaired on the inner surface of the workpiece to be repaired, and inducing the localized electrodeposition in a corresponding region on an inner wall of the workpiece to be repaired by a regional thermal effect of the laser;
• and
• step 6:
• controlling, by a motion controller, a rotation of a tool anode work arm and a coordinated motion of an x-y-z three-axis motion platform to perform a three-dimensional rapid machining on the workpiece to be repaired according to the motion path.