60results about How to "Save filling material" patented technology

The invention discloses a method for filling a friction stir welding keyhole by using a T-shaped filling block and a bitless stirring head. The method comprises the following steps of: (1) performing chambering on the upper part of the friction stir welding keyhole, machining to form a table conical shape of which the upper side is wide and the lower side is narrow, and precleaning the inner wall of the friction stir welding keyhole; (2) preparing the T-shaped filling block; (3) prearranging the T-shaped filling block in a table conical hole, so that a T-shaped endshield is exposed with a certain height; (4) starting the bitless stirring head to rotate and press, so that the T-shaped filling block is subjected to rotary extrusion towards the keyhole; (5) when the stirring head is pressed to be flush with upper surfaces of workpieces to be subjected to repair welding basically, performing in-situ friction for a certain time; and (6) removing trimmings, so that the filling surface is smooth and beautiful. The method has the advantages that: tools (bitless tools) are easy to design and manufacture, the tools are not needed to be replaced when the keyholes are repaired in batch, the filling material is saved, the keyhole is not thinned or is thinned slightly after being welded, and membranes of the side wall and the bottom are well removed, so that the side wall and the bottom can be combined compactly. The method also can be used for repairing defects of casting surfaces and weld joints.