公开(公告)号：USRE37799E1

公开(公告)日：2002-07-23

申请号：US09638514

申请日：2000-08-11

Applicant: Toichi Watanabe ,  Tadashi Sofue

Inventor： Toichi Watanabe ,  Tadashi Sofue

IPC: B23K1125

CPC classification number: B23K11/256 ,  B23K11/115 ,  B23K11/166 ,  B23K2101/18 ,  B23K2103/04 ,  F02B2075/027

Abstract: A method and apparatus for continuously spot-welding galvanized steel sheets overlapped to be bonded by way of a spot welding machine having a pair of electrodes. The galvanized steel sheets clamp a resistance increasing material including a spacer to ensure a gap between the sheets. Bonding surfaces of the galvanized steel sheets partly contact each other when the pair of electrodes pressurize the galvanized steel sheets such that a part of the gap is retained around the spacer between the bonding surfaces. The retained gap has a size in which zinc melted or vapored when a weld current flows between the electrodes can escape through a weld section of the galvanized steel sheets to outside. The method comprises the step of recording an inter-electrode resistance for each spot when the continuous spot welding is executed by the pair of electrodes. The method estimates an electrode lifetime defined by one of the number of spots and a duration of the spot welding until a sufficient nugget will not be formed by way of the electrodes according to the record of the inter-electrode resistance. The method automatically changes weld conditions to enable the continuous spot welding when the electrode lifetime reaches a predetermined electrode lifetime.

Abstract translation: 一种用于通过具有一对电极的点焊机重叠接合的镀锌钢板的方法和装置。 镀锌钢板夹住包括间隔件的电阻增加材料，以确保片材之间的间隙。 当一对电极对镀锌钢板加压时，镀锌钢板的接合表面部分地接触，使得间隙的一部分被保持在接合表面之间的间隔件上。 当焊接电流在电极之间流动时，保留的间隙具有锌熔化或蒸发的尺寸，可以通过镀锌钢板的焊接部分逸出到外部。 该方法包括当通过一对电极执行连续点焊时记录每个点的电极间电阻的步骤。 该方法估计由斑点数目和斑点持续时间之一定义的电极寿命，直到根据电极间电阻的记录，将不会通过电极形成足够的熔核。 当电极寿命达到预定的电极寿命时，该方法自动地改变焊接条件以实现连续点焊。

公开(公告)号：US5075531A

公开(公告)日：1991-12-24

申请号：US429644

申请日：1989-10-31

Applicant: Tadashi Sofue ,  Toichi Watanabe

Inventor： Tadashi Sofue ,  Toichi Watanabe

IPC: B23K11/16 ,  B23K11/11 ,  B23K11/34 ,  B23K35/22

CPC classification number: B23K11/34 ,  B23K35/226

Abstract: An electric resistance welding method for welding zinc plated steel plates. The zinc plated steel plates having at least one surface covered with a plating layer composed of mainly zinc can be welded by the present invention efficiently while overlapping said plating layers, because a material for increasing the resistance between the zinc plated steel plates is employed in the present invention, and it is either spreaded, coated or bonded on the surface of said plating layers to be joined beforehand. Thus, the electric resistance of zinc plated steel plates can be performed by a lower electric current in a shorter time without deteriorating the anti-corrosion property of zinc plated steel plates, because the electric resistance between the steel plates has been increased by such a material.

公开(公告)号：US5793011A

公开(公告)日：1998-08-11

申请号：US554548

申请日：1995-11-07

Applicant: Toichi Watanabe ,  Tadashi Sofue

Inventor： Toichi Watanabe ,  Tadashi Sofue

IPC: B23K11/11 ,  B23K11/16 ,  B23K11/24 ,  B23K11/25 ,  B23K37/00 ,  B65G61/00 ,  F02B75/02 ,  G05B19/418 ,  G06Q50/00 ,  G06Q50/04

CPC classification number: B23K11/256 ,  B23K11/115 ,  B23K11/166 ,  B23K2201/18 ,  B23K2203/04 ,  F02B2075/027

Abstract: A method and apparatus for continuously spot-welding galvanized steel sheets overlapped to be bonded by way of a spot welding machine having a pair of electrodes. The galvanized steel sheets clamp a resistance increasing material including a spacer to ensure a gap between the sheets. Bonding surfaces of the galvanized steel sheets partly contact each other when the pair of electrodes pressurize the galvanized steel sheets such that a part of the gap is retained around the spacer between the bonding surfaces. The retained gap has a size in which zinc melted or vapored when a weld current flows between the electrodes can escape through a weld section of the galvanized steel sheets to outside. The method comprises the step of recording an inter-electrode resistance for each spot when the continuous spot welding is executed by the pair of electrodes. The method estimates an electrode lifetime defined by one of the number of spots and a duration of the spot welding until a sufficient nugget will not be formed by way of the electrodes according to the record of the inter-electrode resistance. The method automatically changes weld conditions to enable the continuous spot welding when the electrode lifetime reaches a predetermined electrode lifetime.

公开(公告)号：US4922075A

公开(公告)日：1990-05-01

申请号：US117913

申请日：1987-11-03

Applicant: Tadashi Sofue ,  Toichi Watanabe

Inventor： Tadashi Sofue ,  Toichi Watanabe

IPC: B23K11/16 ,  B23K11/11 ,  B23K11/34 ,  B23K35/22 ,  B23K9/28

CPC classification number: B23K11/34 ,  B23K35/226

Abstract: An electric resistance welding method for welding zinc plated steel plates is disclosed. The zinc plated steel plates having at least one surface covered with a plating layer composed of mainly zinc can be welded by the present invention efficiently while overlapping said plating layers, because a material for increasing the resistance between the zinc plated steel plates is employed in the present invention, and it is either spreaded, coated or bonded on the surface of said plating layers to be joined beforehand. Thus, the electric resistance of zinc plated steel plates can be performed by a lower electric current in a shorter time without deteriorating the anti-corrosion property of zinc plated steel plates, because the electric resistance between the steel plates has been increased by such a material.

Abstract translation: 公开了一种用于焊接镀锌钢板的电阻焊接方法。 镀覆钢板的至少一个表面被主要由锌构成的镀层覆盖，可以通过本发明有效地焊接镀覆层，因为在镀锌钢板之间增加电阻的材料 本发明，并且预先铺展，涂布或粘结在所述镀层的表面上。 因此，镀锌钢板的电阻可以在更短的时间内通过较低的电流进行，而不会降低镀锌钢板的耐腐蚀性，因为钢板之间的电阻已经通过这种材料增加 。