公开(公告)号：US06335507B1

公开(公告)日：2002-01-01

申请号：US09401942

申请日：1999-09-23

申请人： Yoshinori Nakata ,  Atsushi Mori ,  Tadashi Kurosawa

发明人： Yoshinori Nakata ,  Atsushi Mori ,  Tadashi Kurosawa

IPC分类号： B23K2600

CPC分类号： B23K26/1482 ,  B23K26/0665 ,  B23K26/14 ,  B23K26/142 ,  B23K26/1436 ,  B23K26/1476 ,  B23K26/382 ,  B23K26/40 ,  B23K2103/04 ,  B23K2103/50

摘要： A piercing nozzle (2) having a nozzle hole (2a) larger than the diameter of a converged laser beam (10) and smaller than the diameter of a hole (1a) of a cutting nozzle (1) is in use. Further, an underlay (3) having a hole (3a) at a position corresponding to the nozzle hole (2a) is placed under the piercing nozzle (2) through a clearance (5). Piercing is carried out by irradiating the laser beam (10) to a machining target (6) through nozzle holes (1a, 2a) and (3a) on condition that a laser oscillator is set to output high power. The diameter of a hole machined by the piercing is small, and less scattered dross is produced. The scattered dross is cooled down within the clearance (5) and is then dropped down to the underlay (3), so that the adhesion of the scattered dross to the machining target does not occur. Since a small hole is machined with the high power, the machining time for piercing is remarkably shortened.

摘要翻译： 使用具有大于会聚的激光束（10）的直径并且小于切割喷嘴（1）的孔（1a）的直径的喷嘴孔（2a）的穿刺喷嘴（2）。 此外，在与喷嘴孔（2a）对应的位置具有孔（3a）的底垫（3）通过间隙（5）放置在穿刺喷嘴（2）的下方。 在激光振荡器设定为输出高功率的条件下，通过喷嘴孔（1a，2a）和（3a）将激光束（10）照射到加工对象（6）上来进行穿孔。 由穿孔机加工的孔的直径小，产生较少散落的渣滓。 分散的渣滓在间隙（5）内被冷却，然后下降到底层（3），使得不会发生散射浮渣对加工对象的粘附。 由于通过高功率加工小孔，所以穿孔加工时间显着缩短。

公开(公告)号：US06608279B2

公开(公告)日：2003-08-19

申请号：US09987602

申请日：2001-11-15

申请人： Yoshinori Nakata ,  Atsushi Mori ,  Tadashi Kurosawa

发明人： Yoshinori Nakata ,  Atsushi Mori ,  Tadashi Kurosawa

IPC分类号： B23K2600

CPC分类号： B23K26/1482 ,  B23K26/0665 ,  B23K26/14 ,  B23K26/142 ,  B23K26/1436 ,  B23K26/1476 ,  B23K26/382 ,  B23K26/40 ,  B23K2103/04 ,  B23K2103/50

摘要： A piercing nozzle (2) having a nozzle hole (2a) larger than the diameter of a converged laser beam (10) and smaller than the diameter of a hole (1a) of a cutting nozzle (1) is in use. Further, an underlay (3) having a hole (3a) at a position corresponding to the nozzle hole (2a) is placed under the piercing nozzle (2) through a clearance (5). Piercing is carried out by irradiating the laser beam (10) to a machining target (6) through nozzle holes (1a, 2a) and (3a) on condition that a laser oscillator is set to output high power. The diameter of a hole machined by the piercing is small, and less scattered dross is produced. The scattered dross is cooled down within the clearance (5) and is then dropped down to the underlay (3), so that the adhesion of the scattered dross to the machining target does not occur. Since a small hole is machined with the high power, the machining time for piercing is remarkably shortened.

公开(公告)号：US5818009A

公开(公告)日：1998-10-06

申请号：US531587

申请日：1995-09-21

申请人： Yoshinori Nakata ,  Atsushi Mori

发明人： Yoshinori Nakata ,  Atsushi Mori

IPC分类号： B23K26/06 ,  B23K26/14

CPC分类号： B23K26/1476 ,  B23K26/1437 ,  B23K26/1438

摘要： A laser beam machining system is provided whereby a distribution of flow velocity of an assist gas suited for high-speed cutting is obtained. A nozzle has a nozzle hole for emitting the laser beam and the assist gas therethrough. A helical groove is formed in the inner surface of the nozzle hole. The groove may be a V-shaped groove, that is, an internal thread-type groove. In the case of cutting a workpiece with the nozzle mounted to the laser beam machining system, the closer to the inner surface of the nozzle hole, the slower the flow velocity of the ejected assist gas becomes. Accordingly, the assist gas is ejected at high flow velocity only in the vicinity of the focal point of the laser beam, thus permitting high-speed cutting.

摘要翻译： 提供一种激光束加工系统，由此获得适合于高速切割的辅助气体的流速分布。 喷嘴具有用于发射激光束和辅助气体的喷嘴孔。 螺旋槽形成在喷嘴孔的内表面。 槽可以是V形槽，即内螺纹型槽。 在用安装在激光束加工系统上的喷嘴切割工件的情况下，更靠近喷嘴孔的内表面，喷出的辅助气体的流速越慢。 因此，辅助气体仅在激光束的焦点附近以高流速喷射，因此允许高速切割。

公开(公告)号：US5607606A

公开(公告)日：1997-03-04

申请号：US603955

申请日：1996-02-16

申请人： Atsushi Mori ,  Yoshinori Nakata

发明人： Atsushi Mori ,  Yoshinori Nakata

IPC分类号： B23K26/00 ,  B23K26/04 ,  B23K26/38 ,  B23K26/02

CPC分类号： B23K26/046

摘要： A laser beam machine which makes it possible to effect piercing in a shortest time period and cutting with high accuracy. A program-reading device reads a machining program. A first distance changeover-directing device directs that a workpiece-to-converging point distance between a surface of a workpiece and a converging point of a laser beam is set to one value suitable for piercing when it detects a piercing program in the machining program. Further, a second distance changeover-directing device directs that the workpiece-to-converging point distance is set to one value suitable for cutting when it detects a cutting program in the machining program. A distance control device operates to control the workpiece-to-converging point distance in accordance with directions from the first and second distance changeover-directing devices. That is, the workpiece-to-converging point distance is set to the optimum value for piercing when piercing is carried out, while it is set to the optimum value for cutting when cutting is carried out, thereby completing piercing in a short time period, and effecting cutting with high accuracy.

摘要翻译： 一种激光束机，可以在最短的时间内实现穿孔，并以高精度进行切割。 程序读取装置读取加工程序。 第一距离切换装置指示当在加工程序中检测到穿孔程序时，将工件的表面与激光束的会聚点之间的工件到会聚点距离设置为适合于穿孔的一个值。 此外，第二距离切换装置指示当在加工程序中检测到切割程序时，工件到会聚点距离被设置为适合于切割的一个值。 距离控制装置根据来自第一和第二距离切换装置的方向操作以控制工件到聚合点距离。 也就是说，当进行穿孔时，将工件到会聚点距离设定为穿刺的最佳值，同时在进行切割时将其设定为切割的最佳值，从而在短时间内完成穿孔， 并以高精度进行切割。

公开(公告)号：US5539180A

公开(公告)日：1996-07-23

申请号：US859387

申请日：1992-05-26

申请人： Atsushi Mori ,  Yoshinori Nakata ,  Etsuo Yamazaki

发明人： Atsushi Mori ,  Yoshinori Nakata ,  Etsuo Yamazaki

IPC分类号： B23K26/00 ,  B23K26/12 ,  B23K26/14 ,  B23K26/32 ,  B23K35/38

CPC分类号： B23K26/123 ,  B23K26/12 ,  B23K26/125 ,  B23K26/14 ,  B23K26/1437 ,  B23K26/1476 ,  B23K26/32 ,  B23K26/322 ,  B23K35/38 ,  B23K2201/006 ,  B23K2201/34 ,  B23K2203/04 ,  B23K2203/50

摘要： Oxygen is mixed with another gas to form an auxiliary gas that will permit a welding of zinc-plated steel sheets (3a and 3b) without producing blowholes. An oxygen (O.sub.2) gas cylinder (4a) is provided in addition to an argon (Ar) gas cylinder (4b), for forming the mixed auxiliary gas, and the argon gas and the oxygen gas are mixed in a mixer (6) before being supplied to a machining head (7) and jetted onto a machining spot (9) through a nozzle (8). The oxygen oxidizes the zinc of the zinc-plated steel sheets (3a and 3b) to produce zinc oxide and zinc peroxide, to thereby prevent evaporation and minimize spatters, and thus permits a laser welding with a minimum generation of blowholes.

摘要翻译： PCT No.PCT / JP91 / 00752 Sec。 371日期：1992年5月26日 102（e）日期1992年5月26日PCT提交1991年5月31日PCT公布。 出版物WO92 / 15422 日期：1992年9月17日氧气与另一种气体混合形成辅助气体，允许镀锌钢板（3a和3b）焊接而不产生气孔。 除了用于形成混合辅助气体的氩（Ar）气瓶（4b）之外还设置氧气（O2）气瓶（4a），并且在混合器（6）中将氩气和氧气混合在一起 被提供给加工头（7）并通过喷嘴（8）喷射到加工点（9）上。 氧化锌镀锌钢板（3a和3b）的锌以产生氧化锌和过氧化锌，从而防止蒸发并使飞溅最小化，从而允许以最小的气泡产生激光焊接。

公开(公告)号：US5444211A

公开(公告)日：1995-08-22

申请号：US190127

申请日：1994-02-03

申请人： Yoshinori Nakata ,  Atsushi Mori

发明人： Yoshinori Nakata ,  Atsushi Mori

IPC分类号： B23K26/00 ,  B23K26/04 ,  B23K26/14 ,  B23K26/36 ,  B23K26/38

CPC分类号： B23K26/123 ,  B23K26/14 ,  B23K26/1476

摘要： A laser beam machine executes a cutting operation by irradiating a laser beam onto a workpiece. The cutting operation of nonferrous metals having a considerable thickness is executed effectively and stably. A piercing operation is executed at point A under machining condition A, forming an arc-shaped portion. Then, the machining condition A is changed to machining condition B to execute an enlargement processing, and the arc-shaped portion is extended as it is, forming an enlarged cutting groove. After the enlargement processing is completed at point B, the standoff (or distance from the tip end of a machining nozzle to the surface of the workpiece) is set to as short a distance as possible, and the machining condition is modified to machining condition C. Thus, a cutting operation is started according to machining condition C. Therefore, the cutting operation is executed in substantially the same state as that in which a cutting operation is started directly from the outer-side end of the workpiece. In addition, in the case where the cutting operation is executed, the assist gas pressure is set to a high value, and the standoff is set to a low value, so that dross scattering effect by the assist gas appears more remarkably. Thus, the cutting operation is executed effectively and stably.

摘要翻译： PCT No.PCT / JP93 / 00848 Sec。 371日期：1994年2月3日 102（e）日期1994年2月3日PCT提交1993年6月22日PCT公布。 公开号WO94 / 00271 日期：1994年1月6日。激光束机通过将激光照射到工件上来执行切割操作。 有效且稳定地执行具有相当厚度的有色金属的切割操作。 在加工条件A下的点A处进行穿孔动作，形成弧形部。 然后，加工条件A变为加工条件B以进行放大处理，并且弧形部分原样延伸，形成放大的切割槽。 在点B完成放大处理之后，将间隔（或从加工喷嘴的前端到工件表面的距离）设定为尽可能短的距离，并且将加工条件修改为加工条件C 因此，根据加工条件C开始切割操作。因此，切割操作以与从工件的外侧端直接开始切割操作的状态基本相同的状态执行。 此外，在执行切割操作的情况下，辅助气体压力被设定为高值，并且间隔被设定为低值，使得由辅助气体产生的浮渣散射效果更显着地出现。 因此，有效且稳定地执行切割操作。

公开(公告)号：US5326957A

公开(公告)日：1994-07-05

申请号：US938177

申请日：1992-12-04

申请人： Norio Karube ,  Yoshinori Nakata ,  Atsushi Mori ,  Etsuo Yamazaki

发明人： Norio Karube ,  Yoshinori Nakata ,  Atsushi Mori ,  Etsuo Yamazaki

IPC分类号： B23K9/16 ,  B23K9/167 ,  B23K9/23 ,  B23K10/02

CPC分类号： B23K9/23 ,  B23K9/167

摘要： Surface-treated metallic workpieces such as zinc-plated steel plates are welded with high quality while they are being held in intimate contact with each other. An auxiliary gas including an oxygen gas is ejected from a space (7) around an electrode (1) through a nozzle (8) to a welding point (9) on overlapping surface-treated metallic workpieces such as zinc-plated steel plates (3a, 3b). When the zinc-plated steel plates (3a, 3b) are welded in the atmosphere of the auxiliary gas, the surface layers of zinc and oxygen react with each other, producing a solid oxide such as zinc oxide or zinc peroxide. Therefore, a gas such as a zinc vapor is prevented from being produced between the overlapping zinc-plated steel plates (3a, 3b). The welded joint is of high quality without blowholes which would otherwise blow away molten steel.

摘要翻译： PCT No.PCT / JP92 / 00517 Sec。 371日期1992年12月4日第 102（e）日期1992年12月4日PCT提交1992年4月21日PCT公布。 出版物WO92 / 19412 PCT 日期：1992年11月12日。表面处理的金属工件如镀锌钢板在保持彼此紧密接触的同时以高品质焊接。 包括氧气的辅助气体从电极（1）周围的空间（7）通过喷嘴（8）喷射到重叠的表面处理金属工件（例如镀锌钢板（3a））上的焊接点（9） ，3b）。 当在辅助气体的气氛中焊接镀锌钢板（3a，3b）时，锌和氧的表面层相互反应，生成氧化锌或过氧化锌等固体氧化物。 因此，防止在重叠的镀锌钢板（3a，3b）之间产生诸如锌蒸气的气体。 焊接接头质量高，无气孔，否则会吹走钢水。

公开(公告)号：US06204475B1

公开(公告)日：2001-03-20

申请号：US09431204

申请日：1999-11-01

申请人： Yoshinori Nakata ,  Atsushi Mori

发明人： Yoshinori Nakata ,  Atsushi Mori

IPC分类号： B23K2614

CPC分类号： B23K26/147 ,  B23K26/142 ,  B23K26/382 ,  B23K26/40 ,  B23K2103/04 ,  B23K2103/05 ,  B23K2103/50

摘要： A laser machining apparatus capable of removing spatters and slugs produced in piercing and rising supply pressure of blow gas sufficiently without hindering a jet of assist gas. A piercing assist jig can be turned and moved up and down by a rotary air cylinder and an extendable air cylinder which are attached to a machining head. When piercing is to be performed, the piercing assist jig, which is in a position where it does not interfere with the machining nozzle and the workpiece, is turned to make a center of a hole of the piercing assist jig coincide with a center of the machining nozzle. Then the machining head is moved down to a piercing position, and the piercing assist jig is pressed on a workpiece. Then, a laser beam is irradiated and assist gas is jetted, and also blow gas is jetted from a blow gas supply opening so that the blow gas flows with the assist gas therebetween. Spatters and slugs flying up in the process of piercing are removed by the blow gas without hindering the piercing.

摘要翻译： 一种激光加工装置，其能够在不妨碍辅助气体的喷射的情况下，除去在吹入气体的穿刺和上升的供给压力下产生的飞溅物和s塞。 穿孔辅助夹具可以通过附接到加工头部的旋转气缸和可延伸的气缸来上下移动。 当要进行穿孔时，使处于不与加工喷嘴和工件相干扰的位置的穿刺辅助夹具转动，使得穿孔辅助工具的孔的中心与 加工喷嘴。 然后将加工头向下移动到穿刺位置，并且穿孔辅助夹具被按压在工件上。 然后，照射激光束并喷射辅助气体，并且吹气从吹气供给口喷射，使得吹气与辅助气体之间流动。 在穿孔过程中飞溅的飞溅物和s cing物被吹气除去，而不会妨碍穿孔。

公开(公告)号：US5959864A

公开(公告)日：1999-09-28

申请号：US849449

申请日：1997-06-02

申请人： Atsushi Mori ,  Yoshinori Nakata

发明人： Atsushi Mori ,  Yoshinori Nakata

IPC分类号： B23K26/00 ,  G05B19/416

CPC分类号： G05B19/416 ,  G05B2219/34169 ,  G05B2219/34175 ,  G05B2219/35221 ,  G05B2219/35473 ,  G05B2219/36321 ,  G05B2219/43009

摘要： An acceleration change determination device determines whether or not a change in acceleration at a joint in blocks in a matching program decoded by a pre-processing and arithmetic device is more than a predetermined value. When the change of acceleration is found to be more than the predetermined value, the speed commanding device adjusts the speed to lower commanded speed at points immediately before and immediately after the joint in blocks. A movement control device outputs an interpolation pulse to individual moving axes so that the speed becomes the commanded modified speed, thereby controlling a servo motor.

摘要翻译： PCT No.PCT / JP96 / 02898 Sec。 371日期：1997年6月2日 102（e）日期1996年6月2日PCT提交1996年10月4日PCT公布。 公开号WO97 / 13184 日期1997年04月10日加速度变化判定装置判定由预处理和运算装置解码的匹配程序中的块中的加速度的变化是否大于预定值。 当发现加速度的变化大于预定值时，速度指令装置调整速度以在块之前和紧随其后的点处降低指令速度。 移动控制装置向每个移动轴输出插补脉冲，使得速度成为指令的修正速度，由此控制伺服电动机。

公开(公告)号：US5910261A

公开(公告)日：1999-06-08

申请号：US849149

申请日：1997-05-29

申请人： Atsushi Mori ,  Yoshinori Nakata

发明人： Atsushi Mori ,  Yoshinori Nakata

IPC分类号： B23K26/00 ,  B23K26/08 ,  B23K26/38

CPC分类号： B23K26/08 ,  B23K26/082 ,  B23K26/388

摘要： In a laser machining device for cutting a round hole in a workpiece employing a machining program, a movement path includes a section from point P.sub.1 to point P.sub.2 (passing a hole previously formed in a workpiece) and reaches point P.sub.3 on a circle (40) to be cut. A section P.sub.2 -P.sub.3 of the path is not a simple circular arc but is a curve whose radius of curvature gradually becomes approximate to the radius of a circle 40 to be cut as it gradually decreases towards the end point (P.sub.3) from the start point (P.sub.2) where the radius of the curvature is largest. Thus, the change in acceleration at points P.sub.2 and P.sub.3 of the section P.sub.1 -P.sub.2 -P.sub.3 of the path can be controlled to low levels.

摘要翻译： PCT No.PCT / JP96 / 02862 Sec。 371日期：1996年5月29日 102（e）日期1996年5月29日PCT提交1996年10月2日PCT公布。 出版物WO97 / 12717 日期1997年04月10日在使用加工程序切削工件中的圆孔的激光加工装置中，移动路径包括从点P1到点P2的部分（通过预先形成在工件中的孔）并到达点P3 要切割的圆（40）。 路径的部分P2-P3不是简单的圆弧，而是曲率半径随着从起始点（P3）朝向终点（P3）逐渐减小而逐渐变得接近要切割的圆40的半径 （P2），曲率半径最大。 因此，路径的部分P1-P2-P3的点P2和P3处的加速度变化可以被控制到低水平。