Kawasaki Jukogyo Kabushiki Kaisha

Masahiro Miyake

Hideki Okada

Takuya Fukuda

Yoshitaka Muramatsu

Ryoji Ohashi

Syuhei Yoshikawa

Makoto Tsujinaka

Tadahiro Edagawa

Norichika Kita

Hajime Kashiki

Naoki Takeoka

Kengo Maeda

Masato Fukushima

Yusuke Yoshida

Yutaro Konno

Masahiro Takagi

Yohei Ishido

In a state where a shoulder member is in contact with a contact surface, a pin member is brought into contact with the contact surface to specify a pin movement amount, which is a distance from an initial position of the pin member to the contact surface, and specify a shoulder displacement amount, which is a displacement amount when the shoulder member is retreated as a result of the contact of the pin member. When both a first condition that the pin movement amount is included in a first range and a second condition that the shoulder displacement amount is included in a second range are satisfied, the pin member is retreated from the contact surface by a predetermined return amount, and furthermore, origin point alignment of the pin member and the shoulder member is performed on the basis of positions of the pin member and the shoulder member.

Method for controlling friction stir welding device, and friction stir welding device

A friction stir tool control method is a control method for controlling an operation of a friction stir tool by supplying a necessary drive electric current to a drive source of the tool. The control method includes obtaining a pressurizing force change ratio by comparing a set pressurizing force predefined as a pressurizing force at plunging of the tool into a workpiece with an actual pressurizing force occurring at actual plunging of the tool into the workpiece by supplying a drive electric current for generating the set pressurizing force to the drive source. The drive electric current is regulated in accordance with the pressurizing force change ratio so that the actual pressurizing force comes to the set pressurizing force, and the drive source is driven with the regulated drive electric current.

Friction stir tool control method and friction stir device

A friction stir spot welder includes: a pin; a shoulder; a rotary driver; a tool driver; and circuitry that performs an operation of driving the rotary driver and the tool driver such that the pin and the shoulder press a workpiece by a first pressing force while rotating at a first rotational frequency, and after the operation, performs an operation of driving the rotary driver and the tool driver such that a tip of the shoulder in a rotating state is pressed in to a first position. The first position is a position corresponding to 46% or more of a thickness of the workpiece from a front surface of the workpiece. A press-in speed of the shoulder until the shoulder reaches the first position is a constant speed.

Friction stir spot welder and friction stir spot welding method

A friction stir spot welding apparatus includes a pin member formed in a solid cylindrical shape, a shoulder member formed in a hollow cylindrical shape, the pin member being inserted in the shoulder member, a rotary actuator that rotates the pin member and the shoulder member on an axis that is in agreement with an axial center of the pin member, and a linear actuator that linearly moves each of the pin member and the shoulder member along the axis. A tip-end part of the shoulder member is formed in a tapered shape.

Friction stir spot welding apparatus and joint structure

A double-action friction stir joining system, which includes a double-action friction stir joining device, a cleaning mechanism having a dressing member, a robot, and a control device. The double-action friction stir joining device includes a first rotary driver configured to rotate a pin member and a shoulder member, and a tool driver configured to reciprocate the pin member and the shoulder member. The control device is adapted to (A) operate the tool driver so that the pin member is thrusted into the shoulder member, (B) operate the first rotary driver so that the shoulder member rotates, and (C) operate the robot so that the robot holds the double-action friction stir joining device and the dressing member contacts an inner circumferential surface of the shoulder member.

Double-action friction-stir joining system and method utilizing a cleaning mechanism

A double-acting friction stir spot welding apparatus according to the present disclosure includes a pin member () formed in a cylindrical shape, a shoulder member () formed in a hollow cylindrical shape and into which the pin member () is inserted, a rotary drive () that rotates the pin member () and the shoulder member () on an axis (Xr) coaxial with the pin member (), and a linear drive () that reciprocates each of the pin member () and the shoulder member () along the axis (Xr). Oil solution () is disposed at at least one circumferential surface among an outer circumferential surface () of the pin member (), an inner circumferential surface () of the shoulder member (), an outer circumferential surface () of the shoulder member (), and an inner circumferential surface () of a clamp member ().

Double-acting friction stir spot welding apparatus and method of operating double-acting friction stir spot welding apparatus

A method for operating a double-action friction stir welding device including a welding tool having a pin member and a shoulder member, a projection/retraction mechanism for causing the pin member to project/retract relative to the shoulder member, a rotation mechanism for rotating a welding tool, and an advancing/retracting mechanism for advancing/retracting the welding tool, the method including cleaning at least one of the outer circumferential surface of the pin member and the inner circumferential surface of a through hole of the shoulder member on the basis of the level of an adhesion parameter correlated with the degree of adhesion of the material of a welding object, caused by friction stir welding, on the outer circumferential surface of the pin member and the inner circumferential surface of the through hole of the shoulder member.

Method for operating double-action friction stir welding device, and double-action friction stir welding device

A friction stir spot welding apparatus including a controller that (A) operates a rotary driver and a tool driver such that a pin and a shoulder are brought into contact with a welded workpiece; (B) operates, after the step (A), the rotary driver and the tool driver such that the pin separates from the welded workpiece; and (C) operates, after the step (B), the rotary driver and the tool driver such that the pin advances toward the welded workpiece. The controller controls the tool driver such that pressing force applied to the welded workpiece from the pin and the shoulder in the step (C) is smaller than that in the step (B) and/or controls the rotary driver such that rotational frequencies of the pin and the shoulder in the step (C) are lower than those in the step (B).

Friction stir spot welding apparatus and friction stir spot welding method

A friction spot joining device configured to carry out friction spot joining of a pair of plates includes an advance-retreat drive configured to advance and retreat a tool to/from the plates a rotation drive configured to rotate the tool, and a controller configured to control the advance-retreat drive and the rotation drive. The controller executes a joining control in which the tool is caused to give pressure to the plates while the tool is rotated so that the tool is pushed into the plates, and a separating control in which the tool is separated from the plates when an integrated value (P=I&#xd7;&#x394;T) calculated using a current value (I) of the rotation drive during the joining control and a driving period of time (&#x394;T) during the joining control is determined to be reached a target value.

Friction spot joining device and friction spot joining method

During friction stir spot welding, a controller executes a temperature holding control in which the controller controls a rotation driving unit so that a rotational speed of a tool is set to a value which is equal to or lower than a predetermined rotational speed at which a temperature of the tool is regarded as being equal to a welding temperature of lapped portions, and in which the controller controls a displacement driving unit to increase and reduce a welding pressure or plunge depth of the tool so that the temperature of the tool is held in a predetermined set range.

Friction stir spot welding device and friction stir spot welding method

A method of performing friction stir spot welding of a plurality of steel plates, includes the steps of: friction stirring a spot welding portion of the plurality of steel plates by pressing a tool against the spot welding portion while rotating the tool, to plasticize the spot welding portion by friction heat; cooling the spot welding portion to cause martensitic transformation to occur in the spot welding portion, after the step of friction stirring the spot welding portion; and tempering the spot welding portion by the friction heat by re-pressing the tool against the spot welding portion while rotating the tool, after the step of cooling the spot welding portion.

Friction stir spot welding method and friction stir spot welding device

A spot welding apparatus which performs spot welding of a plurality of plate materials which are lapped to each other, comprises a displacement driving unit which displaces lapped portions of the plurality of plate materials and a tool relatively to each other; a rotation driving unit which rotates the tool; and a controller which controls the displacement driving unit and the rotation driving unit so that the tool is plunged into the lapped portions in a state in which the tool is rotated to perform friction stir spot welding. The controller controls the displacement driving unit so that at least one friction stir spot weld is formed in a region of the lapped portions which is between a plurality of resistance spot welds formed by resistance spot welding.

Spot welding apparatus, spot welding method, and joint structure

A friction stir spot joining apparatus for spot-joining a pair of plate members by friction stirring with a tool's pin portion includes an advancing and retracting driving device configured to advance and retract the tool to and from plate members, a rotationally driving device configured to rotate the tool, and control device configured to control advancing and retracting driving device and rotationally driving device. The control device executes joining control of pushing pin portion into plate members while the tool is rotated and causing pin portion to pressurize plate members, and executes heat dissipation control of reducing at least one of a rotation speed and a tool's pressurization force more than in the joining control while tool is rotated and pin portion is kept pushed into plate members after joining control and separating tool from plate members after the pin portion's surface temperature becomes less than an oxidation onset temperature.

Friction stir spot joining apparatus and friction stir spot joining method

A friction stir spot joining apparatus includes a tool configured to be brought into contact with or separated from a surface of a second plate member on the opposite side to a first plate member of the first and second plate members that are overlaid on each other, a driving unit configured to rotationally drive the tool around its axis, a position adjusting unit configured to adjust a relative position between the tool and the second plate member, a control unit configured to control the driving unit and the position adjusting unit, and a breakage detection unit configured to detect breakage of the tool by controlling the control unit to dispose the tool at a contact position with the second plate member or a predetermined pushed position at one joining position.

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Kobe, Japan

Masahiro Miyake