Abstract: Friction stir spot-welding is performed to join together a stack of a plurality of metal foils and a metal sheet by using a double-acting type rotary tool including a hollow member and a pin member which are movable independently of each other in their axial directions, and a clamp member which is fitted on an outer circumferential surface of the hollow member and which is movable in its axial direction. While an outer annular part of a portion to be friction-stirred is pressed with the clamp member, the pin member is inserted into the above-described portion and the hollow member is retracted, whereby a metal mass is accommodated within a space formed between the above-described portion and the hollow member. Then, the hollow member is advanced to press the metal mass into a hole formed by retraction of the pin member, whereby the hole is filled with the metal mass.

Abstract: Friction stir spot-welding is performed to join together a stack of a plurality of metal foils and a metal sheet by using a double-acting type rotary tool including a hollow member and a pin member which are movable independently of each other in their axial directions, and a clamp member which is fitted on an outer circumferential surface of the hollow member and which is movable in its axial direction. While an outer annular part of a portion to be friction-stirred is pressed with the clamp member, the pin member is inserted into the above-described portion and the hollow member is retracted, whereby a metal mass is accommodated within a space formed between the above-described portion and the hollow member. Then, the hollow member is advanced to press the metal mass into a hole formed by retraction of the pin member, whereby the hole is filled with the metal mass.

Abstract: An equalizing mechanism of a welding apparatus connects an apparatus body and a fixed bracket, and includes a fixed member on the fixed bracket, and a pressure shaft on an apparatus body close to a bottom face of the fixed member. A cutout is at a position facing the fixed member A movable member on the apparatus body accommodates the fixed member. A restrictive member located by side faces of the fixed member and the movable member restricts relative movement thereof to a direction parallel to the pressure shaft. A driven lever is supported by a front portion of the fixed member to abut on an inner front face of the movable member at one end and abut on the pressure shaft at an other end. A spring between a back portion of the fixed member and an inner back face of the movable member presses the two members to move away from each other.

Abstract: An equalizing mechanism connecting an apparatus body and a fixed bracket, includes a fixed member on the fixed bracket, a pressure shaft on an apparatus body closely to a bottom face of the fixed member, and comprising a cutout at a position facing the fixed member, a movable member on the apparatus body to accommodate the fixed member, a restrictive member by side faces of the fixed member and the movable member to restrict relative movement thereof to a direction parallel to the pressure shaft, a driven lever supported by a front portion of the fixed member to abut on an inner front face of the movable member at one end and abut on the pressure shaft at the other end, and a spring between a back portion of the fixed member and an inner back face of the movable member to press the two members to move away from each other.

Abstract: There is provided a fixed type electrode tip removal device capable of reliably removing an electrode tip and realizing full automation of the removal device.

Abstract: There is provided a fixed type electrode tip take-out device capable of solving the problem of irregularities of positions of upper and lower electrode tips by urging a tip magazine to be movable, and fixing the locations of the electrode tips of each group at the portions to be fixed to a welder, thereby taking out the electrode tips from the tip magazine with accuracy. The tip magazine is urged to be movable relative to a base plate by a driving unit, boundary portions of respective through holes are partitioned by elastic boundary walls in which wedges are inserted in the same direction as an axis of each through hole, and lowest end portions of electrode tips of each group housed in the tip magazine are brought into contact with a slide plate fixed to the base plate, and the upper and lower electrode tips of each group located at portions to be fixed to a welder are positioned by stoppers fixed to the base plate.

Abstract: There is provided a fixed type electrode tip take-out device capable of solving the problem of irregularities of positions of the upper and lower electrode tips by urging a tip magazine to be movable, and fixing the locations of the electrode tips of each group at the portions to be fixed to a welder, thereby taking out the electrode tips from the tip magazine with accuracy. The tip magazine is urged to be movable relative to a base plate by a driving unit, boundary portions of respective through holes are partitioned by elastic boundary walls in which wedges are inserted in the same direction as an axis of each through hole, and lowest end portions of electrode tips of each group housed in the tip magazine are brought into contact with a slide plate fixed to the base plate, and the upper and lower electrode tips of each group located at portions to be fixed to a welder and positioned by stoppers fixed to the base plate, thereby forming passages of the stoppers on the elastic boundary walls.

Abstract: There is provided a fixed type electrode tip removal device capable of reliably removing an electrode tip and realizing full automation of the removal device.