公开(公告)号：US5393952A

公开(公告)日：1995-02-28

申请号：US107815

申请日：1993-08-18

Applicant: Yoshihiro Yamaguchi ,  Hitoshi Satoh ,  Toshiya Shintani

Inventor： Yoshihiro Yamaguchi ,  Hitoshi Satoh ,  Toshiya Shintani

IPC: H05H1/34 ,  B23K10/00

CPC classification number: H05H1/34 ,  H05H2001/3436 ,  H05H2001/3457 ,  H05H2001/3468 ,  H05H2001/3478

Abstract: A plasma torch for cutting use comprises a torch body, a water-cooled electrode arranged in the torch body, a nozzle arranged outside the electrode so as to cover the electrode through a plasma gas passage formed therebetween, a nozzle cap covering the nozzle, a nozzle protection cap having, on its front end side, an opening opposing to an orifice of the nozzle and being disposed outside the nozzle cap through an annular secondary gas passage communicating with the opening, the nozzle protection cap being arranged in the secondary gas passage in an electrically insulated state from the electrode and the nozzle, and an insulator disposed in the secondary gas passage and formed of an electrically insulating material, the insulator having a rectifying passage for rectifying a gas flow passing the secondary gas passage. The nozzle protection cap is composed of a front end portion and a base end portion secured to the torch body and the front end portion and the base end portion are detachably coupled with each other.

Abstract translation: PCT No.PCT / JP92 / 00239 Sec。 371日期：1993年8月18日 102（e）日期1993年8月18日PCT提交1992年2月28日PCT公布。 公开号WO92 / 15421 日期：1992年9月17日。一种用于切割用途的等离子体焰炬包括：炬体，设置在炬体内的水冷电极，设置在电极外部的喷嘴，以通过形成在其间的等离子体气体通道覆盖电极; 喷嘴盖覆盖喷嘴，喷嘴保护盖在其前端侧具有与喷嘴的孔相对的开口，并且通过与开口连通的环形二次气体通道设置在喷嘴帽的外部，喷嘴保护盖是 以与电极和喷嘴的电绝缘状态配置在二次气体通路中的绝缘体，以及设置在二次气体通路中并由电绝缘材料形成的绝缘体，所述绝缘体具有整流通路，用于对通过二次气体的气流进行整流 通道。 喷嘴保护盖由前端部和固定于炬体的基端部构成，前端部和基端部可拆卸地连结。

公开(公告)号：US5202544A

公开(公告)日：1993-04-13

申请号：US543801

申请日：1990-08-01

Applicant: Makoto Inoue ,  Kunio Horiai ,  Toshiya Shintani ,  Yoshihiro Yamaguchi

Inventor： Makoto Inoue ,  Kunio Horiai ,  Toshiya Shintani ,  Yoshihiro Yamaguchi

IPC: B23K10/00 ,  B23K10/02 ,  H05H1/34 ,  H05H1/40

CPC classification number: H05H1/40 ,  B23K10/00 ,  B23K10/02 ,  H05H2001/3436 ,  H05H2001/3442 ,  H05H2001/3478

Abstract: The present invention relates to a method of machining plate materials with a plasma cutter and plasma torch. This method is one in which the density of a magnetic flux formed in the range between the vicinity of the surface of an electrode material 3 fixed to the front end of the electrode and the vicinity of the nozzle opening 1b of a nozzle 1 is between 10 and 200 gauss. The magnetic flux is generated by a magnetization apparatus 4 disposed in the vicinity of the electrode 2 of a plasma torch 100. A workpiece 26 is cut by a plasma arc emitted from a nozzle, the diameter d of which is 1.5 mm or less. The plasma torch 100 for use in this method is equipped with a magnetization apparatus 4 in the vicinity of the electrode 2 and the nozzle diameter d is 1.5 mm or less. The above magnetization apparatus 4 is disposed on the same axis as the axis center of the nozzle opening 1b. Thus, even if a voltage drop results from the fact that the nozzle diameter of the plasma torch is made very small, the present invention is free from the double-arc phenomenon and the unstable arc phenomenon, thereby enabling a plasma arc to be stabilized. As a result, stable machining quality and a high-precision machined shape can be obtained.

公开(公告)号：USD451113S1

公开(公告)日：2001-11-27

申请号：US29135711

申请日：2001-01-18

Applicant: Toshiya Shintani ,  Toru Shiina ,  Yoshitaka Niigaki ,  Iwao Kurokawa

Designer： Toshiya Shintani ,  Toru Shiina ,  Yoshitaka Niigaki ,  Iwao Kurokawa

公开(公告)号：US06255618B1

公开(公告)日：2001-07-03

申请号：US09355800

申请日：1999-08-03

Applicant: Toshiya Shintani ,  Yohsuke Imai ,  Yoshitaka Niigaki ,  Iwao Kurokawa ,  Kengo Kamiya ,  Hideto Uematsu

Inventor： Toshiya Shintani ,  Yohsuke Imai ,  Yoshitaka Niigaki ,  Iwao Kurokawa ,  Kengo Kamiya ,  Hideto Uematsu

IPC: B23K1000

CPC classification number: B23K10/02 ,  B23K10/006 ,  B23K2101/18

Abstract: A plasma arc welding for effectively letting gases of low boiling point substances for coating a steel sheet escape, ensuring the escape of a molten metal into gaps between the steel sheets and eventually accomplishing satisfactory plasma arc welding. A hole (31) is first bored in an upper sheet (21)(or both upper and lower sheets (21 and 22)) quickly by using a plasma arc (20) having greater power than an appropriate welding value, and a vapor of coating substances is allowed to escape through the hole (31). Subsequently, power of the plasma arc (20) is lowered to the appropriate welding value, and the upper sheet (21) and the lower sheet (22) are welded together while a filler (9) is being supplied to fill the hole (31) and the gap (23). While boring is made or immediately after boring is finished, the size of the gap (23) is measured on the basis of the plasma arc voltage, and the feed quantity of the filler (9) is controlled in accordance with the size of the gap (23).

Abstract translation: 用于有效地使用于涂覆钢板的低沸点物质的气体的等离子弧焊接逃逸，确保熔融金属逸出到钢板之间的间隙中并最终实现令人满意的等离子体电弧焊接。 首先通过使用具有比适当的焊接值更大的功率的等离子体电弧（20），在上部片材（21）（或上部和下部片材（21和22）两者中）首先钻孔（31） 允许涂层物质通过孔（31）逸出。 随后，将等离子体电弧（20）的功率降低到合适的焊接值，并且在供给填充物（9）以填充孔（31）的同时将上部片（21）和下部片（22）焊接在一起 ）和间隙（23）。 在镗孔完成之后或立即在镗孔完成之后，基于等离子体电弧电压来测量间隙（23）的尺寸，并且根据间隙的尺寸来控制填料（9）的进料量 （23）。

公开(公告)号：US5695663A

公开(公告)日：1997-12-09

申请号：US505310

申请日：1995-08-16

Applicant: Toshiya Shintani ,  Yutaka Nakau

Inventor： Toshiya Shintani ,  Yutaka Nakau

IPC: B23K10/00

CPC classification number: B23K10/00

Abstract: The present invention relates to a plasma cutting method and an NC plasma cutting apparatus in which an improvement can be made in the quality of a bore-cut product obtained by using a transferred plasma arc, and the productive efficiency can also be enhanced. In order to achieve the above-described advantages, the transferred plasma arc is switched to a non-transferred plasma arc at a position immediately before a cutting finishing point and in the vicinity of a position at which cutting lines cross each other. Simultaneously with this switching operation, the moving speed of the plasma torch is varied in accordance with a change in the plasma arc current. Additionally, the transferred plasma arc current is reduced at a position immediately before the cutting finishing point and in the vicinity of a position at which cutting lines cross each other. The moving speed of the plasma torch can be varied in accordance with the reduction in the arc current. Further, the above-described voltage detecting function is kept in the off state during a cutting operation, and it is actuated at a position immediately before the cutting finishing point and in the vicinity of a position at which cutting lines cross each other.

Abstract translation: PCT No.PCT / JP94 / 00271 Sec。 371日期：1995年8月16日 102（e）1995年8月16日PCT PCT 1994年2月23日PCT公布。 WO94 / 19138 PCT公开号 日本1994年9月1日本发明涉及一种等离子切割方法和NC等离子切割装置，其中可以通过使用转移的等离子体电弧获得的钻孔产品的质量得到改进，并且生产效率也可以 加强。 为了实现上述优点，将转移的等离子体电弧切换为在切割结束点之前的位置和切割线彼此交叉的位置附近的未转印等离子体电弧。 与该切换操作同时，等离子体焰炬的移动速度根据等离子体电弧电流的变化而变化。 此外，转印等离子体电弧电流在紧接切割结束点之前的位置和切割线交叉的位置附近减小。 等离子体焰炬的移动速度可以根据电弧电流的减小而变化。 此外，上述电压检测功能在切割操作期间保持在关闭状态，并且在切割完成点之前的位置和切割线彼此交叉的位置附近被致动。

公开(公告)号：USD417459S

公开(公告)日：1999-12-07

申请号：US93353

申请日：1998-09-09

Applicant: Toshiya Shintani ,  Yosuke Imai ,  Iwao Kurokawa ,  Yoshitaka Niigaki ,  Toru Shiina

Designer： Toshiya Shintani ,  Yosuke Imai ,  Iwao Kurokawa ,  Yoshitaka Niigaki ,  Toru Shiina

公开(公告)号：US5653895A

公开(公告)日：1997-08-05

申请号：US615318

申请日：1996-03-18

Applicant: Toshiya Shintani

Inventor： Toshiya Shintani

IPC: B23K10/00 ,  H05H1/34

CPC classification number: H05H1/3405 ,  B23K10/00 ,  B23K2201/18 ,  B23K2203/05 ,  H05H2001/3457 ,  H05H2001/3478

Abstract: There is provided a plasma cutting method using a plasma cutting apparatus which comprises a plasma torch including: an electrode; a confining nozzle so arranged as to surround the electrode with a spacing therefrom that defines a passage for flushing a plasma gas; and an assisting nozzle so arranged as to surround the confining nozzle with a spacing therefrom that defines a passage for flushing a secondary gas, characterized in that a rate of flow of the secondary gas per unit area Vq which is expressed by an equation: Vq=Q/A2 is not less than 250 (m.sup.3 /sec/m.sup.2), where Q is a rate of flow of the secondary gas and A2 is a pinched area of the secondary gas.

Abstract translation: PCT No.PCT / JP94 / 01731 Sec。 371日期：1996年3月18日 102（e）1996年3月18日PCT 1994年10月14日PCT PCT。 公开号WO95 / 10385 日期：1995年04月20日提供了使用等离子体切割装置的等离子切割方法，其包括等离子体焰炬，其包括：电极; 封闭喷嘴，其被布置成围绕电极，其间隔开限定用于冲洗等离子体气体的通道; 以及辅助喷嘴，其被布置成围绕限制喷嘴与其间隔开限定用于冲洗二次气体的通道，其特征在于，每单位面积V q的二次气体的流速由以下等式表示：Vq = Q / A2不小于250（m3 / sec / m2），其中Q是二次气体的流量，A2是二次气体的夹紧面积。

公开(公告)号：USD446795S1

公开(公告)日：2001-08-21

申请号：US29128160

申请日：2000-08-21

Applicant: Toshiya Shintani ,  Toru Shiina ,  Yoshitaka Niigaki ,  Iwao Kurokawa

Designer： Toshiya Shintani ,  Toru Shiina ,  Yoshitaka Niigaki ,  Iwao Kurokawa

公开(公告)号：USD414788S

公开(公告)日：1999-10-05

申请号：US93354

申请日：1998-09-09

Applicant: Toshiya Shintani ,  Yosuke Imai ,  Iwao Kurokawa ,  Yoshitaka Niigaki ,  Toru Shiina

Designer： Toshiya Shintani ,  Yosuke Imai ,  Iwao Kurokawa ,  Yoshitaka Niigaki ,  Toru Shiina

公开(公告)号：US5614110A

公开(公告)日：1997-03-25

申请号：US495513

申请日：1995-07-28

Applicant: Toshiya Shintani ,  Masahiko Hasegawa

Inventor： Toshiya Shintani ,  Masahiko Hasegawa

IPC: B23K10/00 ,  H05H1/34

CPC classification number: B23K10/00 ,  B23K10/006

Abstract: The present invention comprises a plasma cutting method and a cutting apparatus in which switching can be effected between suitable flow rates of a protective gas at the time of piercing and at the time of cutting, and in which suitable compositions of the protective gas can be set with respect to the time of piercing and the time of cutting, so that it is possible to protect a nozzle favorably from dross and the like, to provide a cut surface high quality and to reduce the operating cost of the protective gas. To achieve this, there are provided a piercing completion detection unit (27, 40) which detects an electric current between an electrode (1) and a workpiece (31) at the time of piercing, and which outputs a signal at the time of the completion of the piercing, and a flow regulator (15) which is provided in a protective gas circuit and which switches, in response to the piercing completion signal, the flow rate of the protective gas from a flow rate at the time of piercing to a flow rate at the time of cutting. Further, on-off valves (51, 53) can be provided in the protective gas circuit to effect switching between the composition of the protective gas at the time of piercing and the composition at the time of cutting.

Abstract translation: PCT No.PCT / JP94 / 00091 Sec。 371日期：1995年7月28日 102（e）日期1995年7月28日PCT 1994年1月25日PCT PCT。 公开号WO94 / 16857 日期1994年8月4日本发明包括等离子切割方法和切割装置，其中可以在穿孔时和切割时的保护气体的合适流速之间进行切换，并且其中合适的组成 可以相对于穿孔时间和切割时间来设定保护气体，从而可以有效地保护喷嘴免于浮渣等，从而提供切割表面的高品质并降低保护性的操作成本 加油站。 为了实现这一点，提供了一种在穿孔时检测电极（1）和工件（31）之间的电流的穿孔完成检测单元（27,40），并且在穿孔完成检测单元 完成穿孔，以及流量调节器（15），其设置在保护气体回路中，并且响应于穿刺完成信号将保护气体的流量从穿刺时的流速切换到 切割时的流量。 此外，可以在保护气体回路中设置开闭阀（51,53），以实现穿孔时的保护气体的组成与切断时的组成之间的切换。