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公开(公告)号：US20210023649A1
公开(公告)日：2021-01-28
申请号：US16982644
申请日：2019-03-15
IPC分类号： B23K20/12 , B29C65/06 , B23K20/227
摘要： A friction welding apparatus is provided, which includes a tool, a rotary driver, a linear driver, and a control device. The control device controls the linear driver and the rotary driver so that the tool is rotated while a tip-end part thereof is pressed against a to-be-joined part of a to-be-joined object to increase a temperature of the to-be-joined part at or above an A1 transformation point, the tip-end part of the tool reaches a given first position so that a softened second member sticks into a softened first member, and the tool is drawn out from the to-be-joined part while the tool is rotated.
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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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公开(公告)号：US20210339337A1
公开(公告)日：2021-11-04
申请号：US17282634
申请日：2019-10-10
摘要： A friction stir joining device includes a tool, a rotary driver, a linear-movement driver, and a control device. The control device is adapted to (A) dispose so that a first member opposes to the tool, and the first member, a second member and a third member are located in this order, (B) control the linear-movement driver and the rotary driver so that a tip-end part of the tool presses a joined part of a to-be-joined object while the tool is rotated, (C) control the linear-movement driver and the rotary driver so that the third member softened extends above an upper surface of the second member, and the tip-end part of the tool reaches a first position, and (D) control the linear-movement driver and the rotary driver so that the tool is drawn out from the joined part while the tool is rotated.
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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：US20240293889A1
公开(公告)日：2024-09-05
申请号：US18275763
申请日：2022-02-07
发明人： Masahiro MIYAKE , Takuya FUKUDA , Tadahiro EDAGAWA , Yoshitaka MURAMATSU , Norichika KITA , Makoto TSUJINAKA
IPC分类号： B23K20/12
CPC分类号： B23K20/123 , B23K20/125
摘要： 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.
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公开(公告)号：US20220362889A1
公开(公告)日：2022-11-17
申请号：US17623883
申请日：2020-06-18
IPC分类号： B23K28/02 , B23K37/02 , B23K11/18 , B23K20/12 , B23K20/233
摘要： A joining system (100) of the present invention is for joining a joining target (W) including first, second, and third members (W1), (W2), (W3), and includes a welder (101), a friction stir welding machine (102), and a controller (110) that: (A) causes the welder (101) to weld the second and third members (W2), (W3); (B), after (A), causes the joining target (W) to be placed at the friction stir welding machine (102) so that the first member (W1) is opposed to a distal end of a tool (10); and (C), after (B), controls a linear motion driver (7) and a rotation driver (8) so as to, while pressing the distal end of the tool (10) to the joining target (W), rotate the tool (10) around an axis, so that the softened second and third members (W2), (W3) intrude into the softened first member (W1), thus joining the joining target (W).
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公开(公告)号：US20180297145A1
公开(公告)日：2018-10-18
申请号：US15770221
申请日：2016-10-14
IPC分类号： B23K20/12
摘要： 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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9.发明公开公开(公告)号：US20240351133A1
公开(公告)日：2024-10-24
申请号：US18683510
申请日：2022-07-21
发明人： Daiki YAMAGISHI , Katsutoshi TAKASHIMA , Hiroshi MATSUDA , Ryoji OHASHI , Yoshitaka MURAMATSU , Takuya FUKUDA
IPC分类号： B23K20/12 , B23K101/18 , B23K101/34 , B23K103/04
CPC分类号： B23K20/12 , B23K2101/18 , B23K2101/34 , B23K2103/04
摘要： Provided is a friction stir spot welded joint having high joint strength even in the case where a high strength steel sheet, particularly a steel sheet with a tensile strength (TS) of 980 MPa or more, is used as a material to be welded. An annular groove is formed on an upper surface of an upper sheet out of overlapping steel sheets, and a shape, microstructure, and hardness of a welded portion are appropriately controlled simultaneously.
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公开(公告)号：US20230390860A1
公开(公告)日：2023-12-07
申请号：US18032198
申请日：2021-10-15
发明人： Naoki TAKEOKA , Yoshitaka MURAMATSU , Ryoji OHASHI
IPC分类号： B23K20/12
CPC分类号： B23K20/123 , B23K20/1265 , B23K20/1255 , B23K20/126 , B23K2103/20
摘要： A friction stir spot welder includes a pin, a shoulder, a rotary driver, an advance-retract driver, and circuitry. When a preset and predetermined first period of time has elapsed in a state where a speed of the rotating shoulder in an axial direction or a speed of the pin in the axial direction is a preset and predetermined first speed, the circuitry determines that the tip of the shoulder or the tip of the pin has reached a contact surface of a second workpiece which is in contact with a first workpiece.
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