WO2009009933A1 - Machine de découpe par plasma d'air avec source de gaz comprimé - Google Patents

Machine de découpe par plasma d'air avec source de gaz comprimé Download PDF

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Publication number
WO2009009933A1
WO2009009933A1 PCT/CN2007/002834 CN2007002834W WO2009009933A1 WO 2009009933 A1 WO2009009933 A1 WO 2009009933A1 CN 2007002834 W CN2007002834 W CN 2007002834W WO 2009009933 A1 WO2009009933 A1 WO 2009009933A1
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WO
WIPO (PCT)
Prior art keywords
air
gas
cutting machine
plasma cutting
chassis
Prior art date
Application number
PCT/CN2007/002834
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English (en)
French (fr)
Inventor
Qicai Chen
Original Assignee
Qicai Chen
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Filing date
Publication date
Application filed by Qicai Chen filed Critical Qicai Chen
Publication of WO2009009933A1 publication Critical patent/WO2009009933A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K10/00—Welding or cutting by means of a plasma

Definitions

  • the utility model relates to a cutting instrument, in particular to an air plasma cutting machine with a compressed gas source.
  • the air plasma cutting machine is a new type of thermal cutting equipment.
  • the principle is to generate a plasma arc under high temperature and strong electric field conditions, and then thermal compression or magnetic compression, so that the arc column current is dense, and extremely high temperature and high-speed air flow are generated.
  • This high temperature, high speed plasma arc flame flow causes the contact points of the workpiece to melt rapidly and blows the slag away from the workpiece matrix to form a slit.
  • the plasma cutting machine requires compressed air when working, and has certain requirements for compressed air, it requires a large flow rate of 4 to 5 atmospheres. Therefore, when the existing plasma cutting machine cuts the workpiece, the required compressed air is independent. Air compressors are available.
  • the purpose of the utility model is to provide an air plasma cutting machine with a compressed gas source.
  • it needs to be equipped with a separate air compressor, resulting in carrying Technical problems such as inconvenience, inconvenient operation and so on.
  • the utility model also solves the problems that the existing air compressor has large volume, large vibration, large noise, and the gas supply pressure does not match with the plasma cutting machine.
  • the utility model mainly solves the above technical problems by the following technical solutions: it comprises a plasma generator, an air pump, a gas storage tank, and the plasma generator is fixed on a chassis provided with a wheel, on the left side of the plasma generator
  • the vibration damping floating raft is provided, and the vibration damping floating raft is connected to the chassis through an elastic body, and the gas storage tank is fixed in parallel with the air pump on the vibration damping raft.
  • the gas storage tank is in the form of a cake, placed upright and in close contact with the air pump.
  • the chassis is further provided with a casing for covering the plasma generator, the air pump and the gas storage tank, and a control panel is arranged on the casing, and the control panel is provided with a plasma generator and a gas pump. Control components.
  • the chassis is further provided with an air filter, the air inlet of the air filter is connected to the air tank through a hose, and the air outlet is fixed to the control panel of the outer casing.
  • a brake lock is provided at a lower portion of the chassis near the wheel.
  • the elastic body is a spring, the spring top end; t is connected with a joint with a nut, and the bottom end is welded with a base with a bolt hole.
  • the elastic body is a rubber seat, and a rubber core with a nut is embedded in the top of the rubber seat, and a metal seat with a bolt hole is embedded in a bottom side of the rubber seat.
  • the elastic body is a gas cylinder, and a connecting seat with a screw is fixed to both ends of the gas cylinder, and an inflation nozzle is further provided on the surface of the gas cylinder.
  • a gas guiding hose is connected to the gas nozzle of each of the gas cylinders, and all the air guiding hoses are connected in parallel to a gas guiding pipe.
  • the gas guiding main pipe end is provided with a gas valve and is fixed on the control panel.
  • the ordinary air compressor Since the ordinary air compressor operates, its air pump vibrates very sharply and produces harsh noise. If the ordinary air compressor and the plasma cutter are directly combined and fixed together, the air pump in the air compressor directly transmits the vibration to the plasma cutting during operation. This can easily cause the electronic components in the board to loosen and cause the plasma cutter to malfunction. Therefore, the utility model adopts the vibration damping floating raft technology, and the vibration source one air pump is placed on the rigid floating raft, and the vibration force is greatly attenuated by the flexible connection of the floating raft and the chassis, thereby completely and reliably ensuring the plasma. The use of the cutting machine is safe and the noise pollution of the air pump is greatly reduced.
  • the gas storage tank of the conventional air compressor adopts a cylindrical shape.
  • the gas storage tank of this shape has a large pressure resistance, it is a waste of performance for the gas source of the plasma cutting machine, and its volume is large, which is disadvantageous for Optimize the structure. Therefore, in view of the gas characteristics of the plasma cutting machine, the utility model combines a gas pump with a large exhaust volume and a cake-shaped gas storage tank with moderate pressure resistance and small space, so that the gas source has a small volume.
  • the pressure is moderate, the gas supply is large, and so on, so that the best match with the plasma cutting machine can be achieved.
  • the utility model has the advantages of compact structure, beautiful appearance, convenient operation and high efficiency. It can be used urgently for emergencies, and can be widely used in industrial production with strong mobility and high safety requirements for equipment, such as ship mooring and offshore drilling platform maintenance operations.
  • Figure 1 is a schematic view of the structure of the present invention
  • Figure 2 is a perspective view of the utility model
  • Figure 3 is a partial enlarged view of the portion A shown in Figure 2;
  • Figure 4 is a plan view of the structure shown in Figure 1;
  • Figure 5 is a schematic view showing the structure of the elastic body shown in Figure 1 as a spring
  • Figure 6 is a schematic view showing the structure of the rubber body shown in Figure 1 as a rubber seat;
  • Figure 7 is a schematic view showing the structure of the elastomer shown in Figure 1;
  • Fig. 8 is a structural schematic view showing the vibration damping of the vibration damping floating raft shown in Fig. 1 using a balloon.
  • FIG. 1 is a schematic view of the structure of the present invention.
  • the apparatus is mainly composed of a plasma generator 9, an air pump 6, a gas tank 2, and the like.
  • the plasma generator 9 is fixed to the chassis on which the wheel 3 is mounted, and a brake lock 4 (see Fig. 2) is provided near the wheel 3 at the lower portion of the chassis 5, which prevents the chassis 5 from sliding on a smooth floor.
  • the brake lock 4 is of a lever structure, and a front end of the fulcrum 4b is provided with a post 4a.
  • a plurality of bayonet openings are arranged around the edge of the hub 3a of the inner side of the wheel 3, The brake lock 4, the front end of the post 4a can be caught in any one of the edges of the hub 3a to lock the wheel 3.
  • the chassis 5 is provided with a casing 1 for covering the above-mentioned plasma generator, air pump, and air tank, and a control panel 12 is provided at the front end of the casing.
  • the control panel 12 is provided with display and control elements 14 of a plasma generator and an air pump, such as a pressure dial, a indicator light, a power switch, various output terminals, and the like. This is both aesthetically pleasing and easy to operate, and can further reduce machine noise. In order to make the structure more compact.
  • An air filter 11 is also provided on the chassis. The air inlet of the air filter 11 is connected to the air tank 2 through a pressure resistant hose 10, and the air outlet 13 is fixed to the control panel 12 of the outer casing.
  • FIG. 4 is a top plan view of an air plasma cutting machine with a compressed gas source of the present invention.
  • the vibration damper 7 is provided on the left side of the plasma generator 9, and the damper floating raft 7 is a rigid body (metal plate, metal frame, etc.), and passes through a plurality of elastic bodies 8 and the chassis 5. connection.
  • the gas storage tank 2 is fixed in parallel with the air pump 6 on the vibration damping raft 7.
  • the air pump 6 can be selected from the current commercially available exhaust gas volume greater than 0. 15m 3 /min, a maintenance-free electric air pump; the gas storage tank 2 is in the form of a cake, is placed upright, and is closely attached to the air pump 6, so that the vibration reduction can be reduced.
  • the footprint on the floating raft 7 is beneficial to reduce the overall volume of the utility model.
  • Fig. 5 is a schematic view showing the structure of the spring 8d.
  • the top end of the spring 8d is connected with a connecting seat 8c with a nut 8b.
  • the nut 8b can be screwed into the screw and fixed to the vibration damping raft 7 by a screw; the bottom end of the spring 8d is welded with a pedestal 8e with a bolt hole 8a.
  • the base 8e can be bolted to the chassis.
  • Fig. 6 is a schematic view showing the structure of the rubber body 8d.
  • the top of the rubber seat 8d is embedded (added during thermoforming of the rubber) with a metal core 8c having an internal thread 8b, and the metal core 8c can be screwed into the screw and fixed to the vibration damping raft 7 by the screw; the rubber seat 8d
  • a metal seat 8e with a bolt hole 8a is embedded in the bottom side, and the metal seat 8e can be fixed to the chassis by bolts.
  • Fig. 7 is a schematic view showing the structure of the elastomer 8d. Both ends of the gas ⁇ 8d are fixed by a joint or a joint 8c with a screw 8b, and the screw 8b at both ends thereof can pass through the bolt holes of the damper floating raft 7 and the chassis 5, respectively, and are fixed thereto.
  • An inflatable nozzle 8f is also provided on the surface of the air to facilitate charging and deflation.
  • the gas guiding hoses 15 are connected to all of the gas cylinders 8f, and the air guiding hoses 15 are connected in parallel to a gas guiding main pipe.
  • the end of the air guiding pipe 16 is provided with a gas valve 17 and is fixed on the control panel 12, since the gas vents 8d are controlled by one gas valve, and the gas vents are mutually connected, so that all the gas pressures are It can be kept consistent, while the above structure also facilitates overall inflation or deflation. Therefore, as long as the valve 17 is controlled, the air pressure of all the gas enthalpy 8d can be adjusted.
  • the vibration damping performance of the vibration damping raft 7 is closely related to the elastic force of the elastic body 8, the elastic body 8 is too elastic or too small to affect the damping effect of the vibration damping raft.
  • the elastic force is determined by the internal air pressure. Therefore, by adjusting the air pressure, the vibration damping performance of the vibration damping raft 7 can be actively adjusted, for example, when When the vibration of the vibration ⁇ 7 is large (caused by excessive air force), the gas can be turned on. The valve releases part of the gas in the gas cylinder to reduce the 8d elasticity of the gas cylinder. At this time, the vibration damping performance of the floating raft will be significantly improved.
  • the present invention is not limited to the above specific structure.
  • the vibration damping floating raft has a good vibration isolation effect in addition to the air pump and the gas storage tank, and the vibration damping effect is also provided under the plasma generator. Therefore, the change of the vibration damping raft in position is also within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Description

带压缩气源的空气等离子切割机 技术领域
本实用新型涉及一种切割器具，尤其是涉及一种带压缩气源的空 气等离子切割机。
背景技术
空气等离子切割机是一种新型的热切割设备。 其原理是在高温、 强电场的条件下产生等离子弧， 然后经热压缩或磁压缩，使弧柱电流 密集、 而产生极高的温度和高速气流。 这种高温、 高速的等离子弧焰 流可促使工件的接触点快速熔化，并将熔渣吹离该工件基体而形成割 缝。 由于等离子切割机工作时需要压缩空气， 并且对压缩空气有一定 要求， 要求其流量大， 压力在 4— 5个大气压， 因此现有的等离子切 割机切割工件时， 所需压缩空气均由独立的空气压缩机提供。
目前， 市场上的空气压缩机大都为通用型空气压缩机，其主要特 点是： 振动和噪声较大， 并且储气罐体积较大， 气压一般都在 7. 5个 大气压以上，使用范围很广。 当等离子切割机以上述空气压缩机为气 源时， 虽然其空气流量能满足等离子切割的要求，但由于存在着压力 差， 与等离子切割机不相匹配， 因此需要安装减压阀后才能使用， 这 样就造成资源的浪费。 另外， 当用户在户外利用空气等离子体切割工 件时， 需同时携带空气等离子切割机和体积较大的空气压缩机， 其移 动、运输很不方便， 并且操作时又需要同时控制两台机器， 因而操作 起来也相当麻烦。
发明内容
本实用新型目的是提供一种带压缩气源的空气等离子切割机。以 解决现有等离子切割机使用时需配备独立的空气压缩机，以致造成携 带不方便、 操作使用不方便等技术问题。
本实用新型同时还解决了现有空气压缩机体积大，振动大、 .噪声. 大， 供气压力与等离子切割机不匹配等问题。
本实用新型主要是通过下述技术方案来解决上述技术问题的：它 包括等离子体发生器、 气泵、 储气罐， 所述等离子发生器固定在设有 轮子的底盘上，在等离子发生器左侧设有减振浮筏， 该减振浮筏通过 弹性体与底盘连接， 所述储气罐与气泵一起并列固定在减振浮筏上。
作为优选， 所述储气罐为饼状， 竖立放置并紧贴于气泵。
作为优选， 所述底盘上还设有可将等离子发生器、 气泵、 储气罐 全部罩住的壳体，在壳体上设有控制面板， 该控制面板上设有等离子 发生器和气泵的显控元件。
作为优选， 所述底盘上还设有空气过滤器， 该空气过滤器的进气 口通过软管与储气罐连接， 出气口则固定于外壳的控制面板上。
作为优选， 所述底盘下部靠近轮子的地方设有刹车锁。
作为优选， 所述弹性体为弹簧， 该弹簧顶端; t旱接有带螺母的连接 座， 其底端焊接有带螺栓孔的基座。
作为优选， 所述弹性体为橡胶座， 该橡胶座顶部嵌入带螺母的金 属芯， 其底部侧边嵌入有带螺栓孔的金属座。
作为优选， 所述弹性体为气嚢，该气嚢两端均固定有带螺杆的连 接座， 在气嚢的表面还设有充气嘴。 进一步的， 上述各气嚢的充气嘴 上连接有导气软管， 所有导气软管并联于一导气总管上， 该导气总管 端部设有气阀并固定于控制面板上。
由于普通空气压缩机运行时， 其气泵振动很剧烈， 并产生刺耳的 噪声。 如果将普通空气压缩机和等离子切割机直接组合固定在一起， 那么运行时， 空气压缩机中的气泵会直接将振动传递给等离子切割 机，这样极易造成其电路板中的电子元件松脱而导致等离子切割机发 生故障。 因此， 本实用新型采用减振浮筏技术， 将振动源一一气泵放 在刚性浮筏上，通过浮筏与底盘的柔性连接，可以让振动力大为衰减， 从而彻底、可靠的保证了等离子切割机的使用安全， 同时大大降低了 气泵的噪声污染。
另外，传统空压机的储气罐采用圆柱形状， 虽然这种形状的储气 罐耐压大， 但对于等离子切割机的气源来说， 属于性能上的浪费， 并 且其体积大，不利于优化结构。为此，针对等离子切割机的用气特点， 本实用新型将排气量大的气泵和耐压适中、占用空间小的饼状储气罐 结合在一起应用， 这样让该气源具备了体积小、 压力适中， 供气量大 等优点， 从而真正实现与等离子切割机的最佳匹配。
综上所述， 本实用新型具有结构紧凑， 美观， 操作方便轻松， 效 率高等特点。 既可作为应付突发事件而紧急使用， 又可广泛的用于流 动性强、对设备安全性要求高的工业生产中， 如船泊、 海上钻井平台 的维修作业等。
附图说明
下面结合附图和具体实施方式，对本实用新型的技术方案作进一 步具体的说明。
图 1是本实用新型的结构示意图；
图 2是实用新型的透视图；
图 3是图 2所示 A处局部放大图；
图 4是图 1所示结构的俯视图；
图 5是图 1所示弹性体为弹簧的结构示意图；
图 6是图 1所示弹性体为橡胶座的结构示意图；
图 7是图 1所示弹性体为气嚢的结构示意图； 图 8是图 1所示减振浮筏采用气囊减振的结构示意图。
具体实施方式
图 1是本实用新型的结构示意图。该设备主要由等离子体发生器 9、 气泵 6、储气罐 2等构成。 其中等离子发生器 9固定在装有轮子 3 的底盘上，在底盘 5下部靠近轮子 3的地方设有刹车锁 4(参见图 2 ), 该刹车锁 4可防止底盘 5在光滑的地面上滑动。
由图 3进一步可知， 所述刹车锁 4采用杠杆构造， 其支点 4b的 前端设有一卡柱 4a， 为了配合刹车锁 4 , 轮子 3内侧的轮毂 3a边缘 处绕设有若干卡口， 往上扳剎车锁 4， 其前端的卡柱 4a可卡在轮毂 3a边缘处的任意一^ 口内， 将轮子 3锁住。
底盘 5上设有可将上述等离子发生器、 气泵、储气罐全部罩住的 壳体 1， 在壳体的前端设有控制面板 12。 如图 2所示， 该控制面板 12上安装有等离子发生器和气泵的显控元件 14， 如压力表盘、 指示 灯、 电源开关、 各种输出端子等。 这样既美观又可以方便操作， 并且 还可进一步降低机器噪声。 为了使结构更为紧凑。在底盘上还设有空 气过滤器 11，该空气过滤器 11的进气口通过耐压软管 10与储气罐 2 连接， 出气口 13则固定于外壳的控制面板 12上。
图 4是本实用新型带压缩气源的空气等离子切割机的俯视图。由 该图并结合图 1可知， 等离子发生器 9左侧设有减振浮筏 7， 该减振 浮筏 7为刚性体（金属板、 金属架等）， 通过多个弹性体 8与底盘 5 连接。储气罐 2与气泵 6—起并列固定在减振浮筏 7上。 气泵 6可选 用目前市售排气量大于 0. 15m3/min,免维护的电动气泵； 所述储气罐 2为饼状、 竖立放置， 并紧贴于气泵 6， 这样可减少在减振浮筏 7上 的占地面积， 从而有利于缩小本实用新型的整体体积。
对于上述弹性体 8 , 本实用新型可通过下述几种优选实施方式来 实现：
图 5是弹性体为弹簧 8d的结构示意图。 该弹簧 8d的 顶端悍接 有带螺母 8b的连接座 8c， 螺母 8b内可旋入螺杆， 并通过螺杆固定 在减振浮筏 7上； 弹簧 8d底端焊接有带螺栓孔 8a的基座 8e , 该基 座 8e可由螺栓固定在底盘上。
图 6是弹性体为橡胶座 8d的结构示意图。该橡胶座 8d顶部嵌入 (在橡胶热成型时加入）有带内螺纹 8b的金属芯 8c，其金属芯 8c内 可旋入螺杆， 并通过该螺杆固定在减振浮筏 7上； 橡胶座 8d底部侧 边嵌入有带螺栓孔 8a的金属座 8e， 该金属座 8e可由螺栓固定在底 盘上。
图 7是弹性体为气嚢 8d的结构示意图。该气嚢 8d的两端以胶接 或热合等方式固定有带螺杆 8b的连接座 8c， 其两端螺杆 8b可分别 穿过减振浮筏 7和底盘 5上的螺栓孔并与之固定。在气嚢的表面还设 有充气嘴 8f , 以便随时充、 放气。
另外， 如图 8所示， 在上述气嚢作为弹性体的进一步的应用中， 所有气嚢的充气嘴 8f 上都连接有导气软管 15， 各导气软管 15并联 于一导气总管 16上， 该导气总管 16的端部设有气阀 17并固定于控 制面板 12上， 由于上述气嚢 8d均由一个气阀控制， 并且各气嚢均相 互贯通， 这样所有气嚢的气压可保持一致， 同时上述结构也便于整体 充气或放气。 因此只要控制气阀 17， 就可调节全部气嚢 8d的气压。
由于减振浮筏 7 的减振性能与其弹性体 8 的弹力有着密切的关 系， 弹性体 8弹力过大或过小均会影响减振浮筏减振效果。在本实施 方式中， 由于弹性体 8采用气嚢 8d , 其弹力大小由其内部气压所决 定， 因此，调整气压，就可对减振浮筏 7的减振性能进行主动的调整， 如当减振浮筏 7振动较大时（因气嚢弹力过大而导致）， 就可打开气 阀， 放出气嚢中的部分气体， 以降低气嚢 8d弹力， 此时浮筏的减振 性能将得到明显的改善。
当然， 本实用新型并不局限于以上具体结构。 如在底盘上， 所述 减振浮筏除了设置在气泵、储气罐下有良好的隔振效果外，设置在等 离子体发生器下也同样有较好的隔振效果。 因此， 该减振浮筏在位置 上的变换， 同样属于本发明保护范围。

Claims

权利要求
1. 一种带压缩气源的空气等离子切割机， 包括等离子体发生器、 气泵、储气罐， 其特征是在所述等离子发生器固定在设有轮子的底盘 上，在等离子发生器左侧设有减振浮筏， 该减振浮筏通过弹性体与底 盘连接， 所述储气罐与气泵一起并列固定在减振浮筏上。
2. 根据权利要求 1所述的带压缩气源的空气等离子切割机， 其 特征是在所述储气罐为饼状， 竖立放置并紧贴于气泵。
3. 根据权利要求 1所述的带压缩气源的空气等离子切割机， 其 特征是在所述底盘上还设有可将等离子发生器、 气泵、储气罐全部罩 住的壳体，在壳体上设有控制面板，该控制面板上设有等离子发生器 和气泵的显控元件。
4.根据权利要求 1或 3所述的带压缩气源的空气等离子切割机， 其特征是在所述底盘上还设有空气过滤器，该空气过滤器的进气口通 过软管与储气罐连接， 出气口则固定于外壳的控制面板上。
5. 根据权利要求 1所述的带压缩气源的空气等离子切割机， 其 特征是在所述底盘下部靠近轮子的地方设有刹车器。
6. 根据权利要求 1所述的带压缩气源的空气等离子切割机， 其 特征是在所述弹性体为弹簧，该弹簧顶端焊接有带螺母的连接座， 其 底端焊接有带螺栓孔的基座。
7. 根据权利要求 1所述的带压缩气源的空气等离子切割机， 其 特征是在所述弹性体为橡胶座， 该橡胶座顶部嵌入带螺母的金属芯， 其底部侧边嵌入有带螺栓孔的金属座。
8. 根据权利要求 1所述的带压缩气源的空气等离子切割机， 其 特征是在所述弹性体为气嚢， 该气嚢两端均固定有带螺杆的连接座， 在气嚢的中间设有充气嘴。
9. 根据权利要求 8所述的带压缩气源的空气等离子切割机， 其 特征是在所述气嚢的充气嘴上连接有导气软管，所有导气软實并 ； 一导气总管上， 该导气总管端部设有气阀并固定于控制面 ^上。'；
PCT/CN2007/002834 2007-07-16 2007-09-28 Machine de découpe par plasma d'air avec source de gaz comprimé WO2009009933A1 (fr)

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CN104384693A (zh) * 2014-11-18 2015-03-04 广东工业大学 一体化手持式等离子熔覆设备
CN106944726A (zh) * 2017-05-08 2017-07-14 浙江颐顿机电有限公司 一体式空气等离子切割机
CN108326405A (zh) * 2018-04-18 2018-07-27 南京奇锐创特焊接技术有限公司 内置气泵的等离子切割机
CN109158808A (zh) * 2018-09-28 2019-01-08 江苏派远软件开发有限公司 一种焊接机器人行走导轨底座工装
CN113695722B (zh) * 2021-10-14 2023-01-31 王兵 一种等离子切割机
CN114643398B (zh) * 2022-04-29 2024-05-14 温岭阿凡达机电有限公司 内置气泵焊机

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JPH07251271A (ja) * 1994-03-16 1995-10-03 Hitachi Seiko Ltd コンプレッサを備えたプラズマ切断機
US5726416A (en) * 1996-10-23 1998-03-10 Sansha Electric Manufacturing Company, Limited Air plasma arc cutter
CN1217247A (zh) * 1997-11-12 1999-05-26 株式会社三社电机制作所 等离子体弧应用装置
CN2399147Y (zh) * 1999-10-28 2000-10-04 李永信 一体式空气等离子切割机

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CN2056454U (zh) * 1989-05-03 1990-04-25 高靖中 一种消声节能全封闭压缩机
CN2152341Y (zh) * 1992-12-07 1994-01-05 谢陈志 多功能修理机
JPH07251271A (ja) * 1994-03-16 1995-10-03 Hitachi Seiko Ltd コンプレッサを備えたプラズマ切断機
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CN1217247A (zh) * 1997-11-12 1999-05-26 株式会社三社电机制作所 等离子体弧应用装置
CN2399147Y (zh) * 1999-10-28 2000-10-04 李永信 一体式空气等离子切割机

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