公开(公告)号：US5276301A

公开(公告)日：1994-01-04

申请号：US44713

申请日：1993-04-12

申请人： Kunio Kohsaka ,  Akihiro Komori

发明人： Kunio Kohsaka ,  Akihiro Komori

IPC分类号： B23H1/02 ,  B23H7/02 ,  B23H7/04

CPC分类号： B23H7/04 ,  B23H1/022

摘要： In a wire electric discharge machine, a permissible discharge frequency is calculated on the basis of an average discharge frequency per unit time which is estimated on the basis of a target inter-electrode voltage or a detected average inter-electrode voltage and a discharge period. The number of times a discharge is actually induced between a wire electrode and a workpiece every unit time is counted and the application of a pulse-shaped voltage is ceased for a residual time of the unit time by a control device when the discharge frequency exceeds the permissible discharge frequency.

摘要翻译： 在电线放电机中，基于目标电极间电压或检测出的平均电极间电压和放电期间推定的每单位时间的平均放电频率来计算容许放电频率。 对每单位时间内的线电极和工件之间实际感应出的放电次数进行计数，并且当放电频率超过时，通过控制装置停止单位时间的剩余时间的脉冲状电压的施加 允许放电频率。

公开(公告)号：US4983807A

公开(公告)日：1991-01-08

申请号：US529480

申请日：1990-05-29

申请人： Osamu Yamada ,  Hisaaki Yamane ,  Kunio Kohsaka

发明人： Osamu Yamada ,  Hisaaki Yamane ,  Kunio Kohsaka

IPC分类号： B23K10/00

CPC分类号： B23K10/006

摘要： In a plasma cutting apparatus for cutting a workpiece with a plasma arc, a cutting torch moves relative to the workpiece. The cutting torch produces plasma arc in accordance with a cutting current supplied thereto. To improve surface roughness of the cut facet of the workpiece, a pulsating current is superimposed on a D.C. current to provide the cutting current, wherein the frequency of the pulsating current is controlled in accordance with the moving speed of the cutting torch.

摘要翻译： 在用等离子弧切割工件的等离子切割装置中，切割炬相对于工件移动。 割炬根据供给的切割电流产生等离子体电弧。 为了改善工件的切割面的表面粗糙度，将脉动电流叠加在直流电流上以提供切割电流，其中根据割炬的移动速度来控制脉动电流的频率。

公开(公告)号：US5043554A

公开(公告)日：1991-08-27

申请号：US495701

申请日：1990-03-19

申请人： Kunio Kohsaka ,  Osamu Yamada ,  Hisaaki Yamane

发明人： Kunio Kohsaka ,  Osamu Yamada ,  Hisaaki Yamane

IPC分类号： B23K10/00

CPC分类号： B23K10/006

摘要： A plasma-arc cutting apparatus having a plasma torch producing a plasma arc and cutting a workpiece with the plasma arc, the plasma torch including a nozzle from whcih the plasma arc is ejected toward the workpiece; a feed device moving the plasma torch relative to the workpiece; a magnetic-field forming device producing a magnetic filed, and applying the magnetic field to the plasma arc so as to intersect the plasma arc and thereby deflect the arc; a first control device numerically controlling the feed device according to cutting operation information, the cutting operation information including cutting path data representative of a predetermined curved cutting path along which the plasma torch is moved over the workpiece, the first control means providing torch position data representative of a current position of the plasma torch relative to the workpiece; and a second control device controlling the magnetic-field forming device according to the cutting operation information and the torch position data so that the plasma arc is deflected to an optimum direction with respect to a direction of movement from the current position of the plasma torch as the plasma torch is moved along the curved cutting path.

摘要翻译： 一种等离子体电弧切割装置，具有产生等离子体电弧的等离子体焰炬和用等离子体电弧切割工件，等离子体焰炬包括从等离子弧向工件喷射的喷嘴; 使等离子体焰炬相对于工件移动的送料装置; 产生磁场的磁场形成装置，并且将等离子体电弧施加到与等离子体电弧相交并从而使电弧偏转的磁场; 第一控制装置，根据切割操作信息数字地控制进给装置，切割操作信息包括代表等离子体焰炬在工件上移动的预定弯曲切割路径的切割路径数据，第一控制装置提供割炬位置数据代表 等离子体焰炬相对于工件的当前位置; 以及第二控制装置，根据切割操作信息和割炬位置数据控制磁场形成装置，使得等离子体电弧相对于从等离子体焰炬的当前位置的移动方向偏转到最佳方向，如 等离子体焰炬沿着弯曲的切割路径移动。

公开(公告)号：US5235155A

公开(公告)日：1993-08-10

申请号：US592818

申请日：1990-10-04

申请人： Osamu Yamada ,  Hisaaki Yamane ,  Kunio Kohsaka

发明人： Osamu Yamada ,  Hisaaki Yamane ,  Kunio Kohsaka

IPC分类号： B23K10/00 ,  H05H1/34

CPC分类号： H05H1/3405 ,  H05H2001/3468 ,  H05H2001/3478

摘要： The plasma cutting device of the present invention comprises a plurality of release ports for releasing the work gas to prevent adverse influence on the cutting processing besides the exhaust port for jetting the gas toward the work. Accordingly the flow rate and velocity of the swirl flow are increased and the flow rate of the jet gas is still kept the same as that in the conventional device, resulting in stabilizing the plasma arc and performing superior cutting.

摘要翻译： 本发明的等离子切割装置包括多个用于释放工作气体的释放口，以防止除了将气体朝向工件喷射的排气口之外对切割加工的不利影响。 因此，涡流的流量和速度增加，并且喷射气体的流量仍然保持与常规装置相同，导致等离子体电弧稳定并且执行优异的切割。