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公开(公告)号：US20180354064A1
公开(公告)日：2018-12-13
申请号：US15778854
申请日：2016-11-15
IPC分类号： B23K20/12
CPC分类号： B23K20/1265 , B23K20/12 , B23K20/123 , B23K20/125 , B23K20/1255 , B23K20/126
摘要： 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=ID×ΔT) calculated using a current value (ID) of the rotation drive during the joining control and a driving period of time (ΔT) during the joining control is determined to be reached a target value.
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公开(公告)号：US20180304401A1
公开(公告)日：2018-10-25
申请号：US15770226
申请日：2016-10-14
IPC分类号： B23K20/12
CPC分类号： B23K20/1235 , B23K20/12 , B23K20/1255
摘要： 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.
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公开(公告)号：US20230211434A1
公开(公告)日：2023-07-06
申请号：US17928461
申请日：2021-05-27
IPC分类号： B23K20/12
CPC分类号： B23K20/125 , B23K20/124 , B23K20/126
摘要： 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.
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公开(公告)号：US20220143739A1
公开(公告)日：2022-05-12
申请号：US17435658
申请日：2020-02-28
发明人： Ryoichi HATANO , Shintaro FUKADA , Yusuke YOSHIDA , Shunsuke HARUNA , Masahiro MIYAKE , Kengo MAEDA
摘要： A friction stir spot welding apparatus includes: a pin that is columnar; a shoulder that is cylindrical, the pin being within the shoulder; a rotary driver that rotates the pin and the shoulder about an axis that coincides with a center axis of the pin; and an advance-retreat driver that advances and retreats the pin and the shoulder along the axis. A first groove is formed at a tip end portion of an outer peripheral surface of the shoulder so as to extend in a direction along the center axis of the pin.
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公开(公告)号：US20190262934A1
公开(公告)日：2019-08-29
申请号：US16344762
申请日：2017-10-31
IPC分类号： B23K20/12
摘要： 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.
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公开(公告)号：US20190143442A1
公开(公告)日：2019-05-16
申请号：US16097496
申请日：2017-04-27
摘要： 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.
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公开(公告)号：US20220339734A1
公开(公告)日：2022-10-27
申请号：US17762733
申请日：2020-09-15
IPC分类号： B23K20/12
摘要： A double-acting friction stir spot welding apparatus according to the present disclosure includes a pin member (11) formed in a cylindrical shape, a shoulder member (12) formed in a hollow cylindrical shape and into which the pin member (11) is inserted, a rotary drive (57) that rotates the pin member (11) and the shoulder member (12) on an axis (Xr) coaxial with the pin member (11), and a linear drive (53) that reciprocates each of the pin member (11) and the shoulder member (12) along the axis (Xr). Oil solution (70) is disposed at at least one circumferential surface among an outer circumferential surface (11c) of the pin member (11), an inner circumferential surface (12b) of the shoulder member (12), an outer circumferential surface (12c) of the shoulder member (12), and an inner circumferential surface (13b) of a clamp member (13).
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公开(公告)号：US20210331421A1
公开(公告)日：2021-10-28
申请号：US17368826
申请日：2021-07-07
发明人： Hideki OKADA , Masahiro MIYAKE
摘要： 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 (A), the rotary driver and the tool driver such that the pin separates from the welded workpiece; and (C) operates, after the (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 (C) is smaller than that in the (B) and/or controls the rotary driver such that rotational frequencies of the pin and the shoulder in the (C) are lower than those in the (B).
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公开(公告)号：US20210086291A1
公开(公告)日：2021-03-25
申请号：US16644356
申请日：2018-09-03
IPC分类号： B23K20/12
摘要： 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.
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公开(公告)号：US20190314927A1
公开(公告)日：2019-10-17
申请号：US16313785
申请日：2017-06-26
摘要： 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.
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