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公开(公告)号：US11897049B2
公开(公告)日：2024-02-13
申请号：US18132430
申请日：2023-04-10
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Inventor： Shujun Chen , Bo Cheng , Xinhong Xie , Zirui Cao
CPC classification number: B23K20/1245
Abstract: The invention provides a retractable friction stir welding spindle, aims at the deficiencies and defects of the existing friction stir welding spindle technology, that is, when the welding is finished, the stirring needle leaves a keyhole at the end of the weld seam, which affects the forming performance of the workpiece, the overall structure design of the spindle is complicated with many transmission chains and low reliability which is difficult to realize modularization. The retractable friction stir welding spindle includes an electric spindle system and a retracting mechanism. The electric spindle system includes stirring shaft shoulder, hilt, front end cover, hollow spindle, motorized spindle shell, motor rotor, motor stator, tail end cover, etc. The retracting mechanism includes stirring needle, connecting ball head and electric cylinder. The invention has the advantages of simple structure and can be mainly divided into two modules to improve reliability and integrity. The invention can also avoid the generation of friction stir welding keyhole.
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Patent Agency Ranking
公开(公告)号：US09656341B2
公开(公告)日：2017-05-23
申请号：US14917270
申请日：2014-10-13
Applicant: Beijing University of Technology
Inventor： Fan Jiang , Jianxin Wang , Shujun Chen , Jinlong Gong , Guangqiang Men
Abstract: A low-back-pressure penetrating arc welding apparatus and a welding method using the same are disclosed. Through vacuuming a central vacuum chamber of a low-back-pressure protection device by a suction device, a plume of a penetrating arc located in the central vacuum chamber, as well as a back side of a keyhole molten pool, are maintained in a negative-pressure vacuum state relative to an argon gas ambience. A pressure gradient in the keyhole molten pool is thus generated that points from a front side of the keyhole molten pool to the back side of the keyhole molten pool. The pressure gradient thus further enhances a stiffness of the front side of the keyhole molten pool as well as a stability of the penetrating arc, resulting in an enhancement in the piercing capability of the penetrating arc, without changing a force distribution and a temperature gradient of the keyhole molten pool.
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公开(公告)号：US09457420B2
公开(公告)日：2016-10-04
申请号：US13917520
申请日：2013-06-13
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Inventor： Shujun Chen , Liang Zhang , Ning Huang , Xuping Wang , Zhenyang Lu , Fan Jiang
Abstract: Gas metal arc welding (GMAW) is a widely used process for joining metals. Its main advantage over its competition gas tungsten arc welding (GTAW) is its high productivity in depositing metals. However, to melt metal from the wire to deposit into the work-piece, additional heat is consumed and applied to the work-piece with an uncontrolled fixed proportion to the effective heat that melts the wire. Such additional heat is often in excess of the needed heat input for the work-piece. The side-effects include a waste of the energy, an increased distortion, and possible materials property degradation. This invention is to device a method to transfer this part of heat to melt the wire by adding two wires, which form a pair of arc spots, under a tungsten arc. It also devices a method to assure the arc between the two wires be maintained stable such that the transfer be successfully continuous. The successful continuous transfer improves the energy efficiency, eliminates the adverse effects on the distortion and materials property, and decouples the controls on mass input and heat input on the work-piece.
Abstract translation: 气体电弧焊（GMAW）是一种广泛使用的连接金属的工艺。 其主要优势在于其竞争对手的气体钨电弧焊（GTAW）是其在金属沉积方面的高生产率。 然而，为了从金属线中熔化金属以沉积到工件中，消耗额外的热量并以不受控制的固定比例施加到工件上，以使熔化电线的有效热量。 这种额外的热量通常超过工件所需的热量输入。 副作用包括能量的浪费，增加的变形和可能的材料性质退化。 本发明是为了设置一种方法，通过在钨电弧下添加形成一对电弧点的两条电线来转移该部分热量来熔化电线。 它还设置了一种确保两条电线之间的电弧保持稳定的方法，使得传输成功连续。 成功的连续传输提高了能源效率，消除了对失真和材料性能的不利影响，并使控制在工件上的质量输入和热输入上解耦。
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公开(公告)号：US20230241707A1
公开(公告)日：2023-08-03
申请号：US18132430
申请日：2023-04-10
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Inventor： Shujun Chen , Bo Cheng , Xinhong Xie , Zirui Cao
IPC: B23K20/12
CPC classification number: B23K20/1245
Abstract: The invention provides a retractable friction stir welding spindle, aims at the deficiencies and defects of the existing friction stir welding spindle technology, that is, when the welding is finished, the stirring needle leaves a keyhole at the end of the weld seam, which affects the forming performance of the workpiece, the overall structure design of the spindle is complicated with many transmission chains and low reliability which is difficult to realize modularization. The retractable friction stir welding spindle includes an electric spindle system and a retracting mechanism. The electric spindle system includes stirring shaft shoulder, hilt, front end cover, hollow spindle, motorized spindle shell, motor rotor, motor stator, tail end cover, etc. The retracting mechanism includes stirring needle, connecting ball head and electric cylinder. The invention has the advantages of simple structure and can be mainly divided into two modules to improve reliability and integrity. The invention can also avoid the generation of friction stir welding keyhole.
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公开(公告)号：US20160243642A1
公开(公告)日：2016-08-25
申请号：US14917270
申请日：2014-10-13
Applicant: Beijing University of Technology
Inventor： Fan Jiang , Jianxin Wang , Shujun Chen , Jinlong Gong , Guangqiang Men
Abstract: A low-back-pressure penetrating arc welding apparatus and a welding method using the same are disclosed. Through vacuuming a central vacuum chamber of a low-back-pressure protection device by a suction device, a plume of a penetrating arc located in the central vacuum chamber, as well as a back side of a keyhole molten pool, are maintained in a negative-pressure vacuum state relative to an argon gas ambience. A pressure gradient in the keyhole molten pool is thus generated that points from a front side of the keyhole molten pool to the back side of the keyhole molten pool. The pressure gradient thus further enhances a stiffness of the front side of the keyhole molten pool as well as a stability of the penetrating arc, resulting in an enhancement in the piercing capability of the penetrating arc, without changing a force distribution and a temperature gradient of the keyhole molten pool.
Abstract translation: 公开了一种低背压穿透电弧焊接装置及使用其的焊接方法。 通过抽吸装置对低背压保护装置的中央真空室进行抽真空，位于中央真空室中的贯穿弧的羽流以及钥匙孔熔池的背面保持为负 相对于氩气氛围压力真空状态。 因此，产生从锁孔熔池的前侧到锁孔熔池的背面的键槽熔池的压力梯度。 因此，压力梯度进一步增强了锁孔熔池的前侧的刚度以及穿透弧的稳定性，导致穿透弧的穿透能力的增强，而不改变力分布和温度梯度 钥匙孔熔池。
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公开(公告)号：US20160067811A1
公开(公告)日：2016-03-10
申请号：US14865491
申请日：2015-09-25
Applicant: Beijing University of Technology
Inventor： Fan JIANG , Jianxin Wang , Shujun Chen , Shan Sheng , Jinlong Gong
Abstract: The present disclosure relates to a central negative pressure arc welding apparatus and method. Through a pumping gas pipeline from the suction device to hollow tubular electrode, a suction device may establish a stable, high energy density and binding arc beneath hollow tubular electrode. The binding degree, energy density and voltage of arc may be adjusted by changing the value of negative pressure in the center of arc. Accordingly, welding heat input and coefficient of weld may be precisely controlled. This apparatus may further set up central pulsating negative pressure arc by turning on valve periodically to make a periodic negative pressure in the center of arc. This present disclosure both possesses good stability and adaptability of traditional Gas Tungsten Arc Welding and achieves binding arc and good penetration of Plasma Arc Welding. Furthermore, this present disclosure improves the mechanical properties of welded joints.
Abstract translation: 本发明涉及一种中央负压电弧焊接装置及方法。 通过从抽吸装置到中空管状电极的泵送气体管道，抽吸装置可以在中空管状电极下方建立稳定的高能量密度和结合电弧。 电弧的结合度，能量密度和电压可以通过改变电弧中心的负压值来调节。 因此，可以精确地控制焊接热输入和焊接系数。 该装置可以通过周期性地打开阀来进一步设置中心脉动负压电弧，从而在电弧中心产生周期性的负压。 本发明既具有传统气体钨丝焊接的稳定性和适应性，又实现了等离子弧焊接的焊接弧和良好的穿透性。 此外，本公开内容改善了焊接接头的机械性能。
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