公开(公告)号：EP0268757A1

公开(公告)日：1988-06-01

申请号：EP87112633.0

申请日：1987-08-29

申请人： ALLIED CORPORATION

发明人： Myers, Martin G. c/o ALLIED CORPORATION ,  Barrett, William A. c/o ALLIED CORPORATION

IPC分类号： H01T21/02

CPC分类号： H01T21/02

摘要： A method of manufacturing an electrode (40) for a spark plug. A cylindrical length (10) of inconel wire has a first end (12) with a flat surface thereon. The inconel wire (10) is placed in a die and partially ex­truded to create a cylindrical bore (16) that extends from a second end (14) toward the first end (12). A strip of platinum (18) is welded to the flat surface (12) after which a chamfering (22) operation removes any ex­cess platinum and weld flash to produce a cylindrical tip (18) on said first end. The inconel wire (10) with its platinum tip (18) is placed in a die and struck with a force causing the cylindrical bore (16) to be extended while the platinum flows (24) along the chamfer (22) to completely cover the weld (20). A copper core (26) is inserted in said cylindrical bore (16) and then further struck to extrude the resulting electrode (36) to a de­sired length.

摘要翻译： 一种制造用于火花塞的电极（40）的方法。 铬镍铁合金的圆柱形长度（10）具有在其上具有平坦表面的第一端（12）。 将铬镍铁合金（10）放置在模具中并部分地挤出以形成从第二端（14）朝向第一端（12）延伸的圆柱形孔（16）。 将铂带（18）焊接到平坦表面（12）上，之后倒角（22）操作除去任何多余的铂和焊接闪光，以在所述第一端上产生圆柱形尖端（18）。 具有其铂尖端（18）的铬镍铁合金（10）被放置在模具中并且以使得圆柱形孔（16）沿着倒角（22）流动（24））延伸的力被撞击以完全覆盖 焊接（20）。 将铜芯（26）插入所述圆柱形孔（16）中，然后进一步冲击以将所得电极（36）拉伸至所需长度。

公开(公告)号：EP0270746A1

公开(公告)日：1988-06-15

申请号：EP87112706.4

申请日：1987-09-01

申请人： ALLIED CORPORATION

发明人： Moore, David J. c/o ALLIED CORPORATION ,  Barrett, William A. c/o ALLIED CORPORATION

IPC分类号： H01T21/02

CPC分类号： H01T21/02

摘要： A method of manufacturing an electrode (20) for a spark plug (32) wherein a platinum cup member or (54) cap is attached to a tip (12) that extends from an ex­truded inconel body (10). The inconel body (10) is se­quentially extruded from a cylindrical blank to produce a tip (12) on a first end (12) and a cup shaped (16) open­ing that extends from a second end (14) toward the first end (12). A copper core (18) is inserted into the cup (16) and the cylindrical blank (10) thereafter extruded to a substantially final length for the resulting center wire (20). In order to assure a uniform thickness, a source of platinum (38) is rolled into a thin strip and a (44) disc is punched therefrom. The disc (44) is formed into a cap member (54) which has the shape of a cup. The resulting cap member (54) and center wire (20) are placed in a fixture and the cap member (54) is moved toward the center wire (20) until the cap member surrounds the tip (12). Thereafter electrical current is passed through the cylindrical body (20) and cap member (54). The junction between the tip (12) and cap member (54) causes an arc to be produced which results in the generation of thermal energy. The electrical current is terminated when the thermal energy heats the inconel adjacent the junction to its melting point. A compressive force is maintained on the center wire (20) and cap member (54) causing the cap member to fuse to the tip (12) and complete the manufacture of the electrode (20).

摘要翻译： 一种制造用于火花塞（32）的电极（20）的方法，其中铂金构件或（54）帽连接到从挤压的铬镍铁合金体（10）延伸的尖端（12）。 从第一端（12）和从第二端（14）朝向第一端（12）延伸的杯形（16）开口产生尖端（12） ）。 将铜芯（18）插入杯子（16）中，然后将圆柱形坯件（10）挤压成所得中心线（20）的基本上最终长度。 为了保证厚度均匀，将铂（38）源卷成薄带并从中冲出（44）圆盘。 盘（44）形成为具有杯形的盖构件（54）。 将所得到的帽构件（54）和中心线（20）放置在夹具中，并且帽构件（54）朝向中心线（20）移动，直到帽构件围绕末端（12）。 此后，电流通过圆柱形主体（20）和帽部件（54）。 尖端（12）和盖部件（54）之间的接合处引起产生电弧，从而导致产生热能。 当热能将接合处附近的因科镍合金加热到其熔点时，电流终止。 中心线（20）和帽构件（54）上保持压缩力，使帽构件熔合到尖端（12）并完成电极（20）的制造。