Friction stir welding apparatus

摘要

A friction stir welding apparatus having a new cooling system that can cool a portion required to be cooled accurately and uniformly with a simple configuration, while suppressing unnecessary thermal expansion of a mounting jig includes a holding mechanism 20 having a holding member 22a movable with respect to a processing target member W so as to freely hold the processing target member W, in which the holding member 22a and a portion of a mounting jig 12 that can freely face the holding member 22a become paired, and a coolant supply source S that can freely supply a coolant to the paired holding member 22a and the portion of the mounting jig 12.

主权项

1. A friction stir welding apparatus comprising:
a welding tool that is movable in a vertical direction with respect to a processing target side surface of a processing target member and having a probe that is rotatable with respect to the processing target member; a mounting member having a mounting jig on which the processing target member is mounted; a movement mechanism having an arm to which an attachment jig attached with the welding tool is fixed so as to be able to move the welding tool with respect to the processing target member by moving the arm; a holding mechanism having a holding member movable with respect to the processing target member so as to hold the processing target member, in which the holding member and a portion of the mounting jig facing the holding member in the vertical direction define a pair of the holding member and the portion of the mounting jig, the holding member pivotably supported at an end of the mounting member so as to define an upper position in which the processing target member is released from the holding member and a lower position in which the processing target member is pressed and held by the holding member with the pair of the holding member and the portion of the mounting jig being faced with each other, while turning between the upper position and the lower position; respective coolant flow passages arranged in the pair of the holding member and the portion of the mounting jig profiles of which are to be overlapped intervening the processing target member in the vertical direction, with the holding member being positioned at the lower position; a pipe having flexibility to connect the respective coolant flow passages, while allowing the holding member to turn between the upper position and the lower position; and a coolant supply source configured to supply a coolant to the respective coolant flow passages, wherein the coolant supplied from the coolant supply source to one of the respective coolant flow passages is returned to the coolant supply source after flowing from the one of the respective coolant flow passages to the other of the respective coolant flow passages via the pipe.