JPS6313793B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plasma cutting machine in which consumable parts can be easily attached and detached.

When replacing consumable parts such as electrodes, nozzles, and sealing materials in plasma cutting machines commonly used today, it is necessary to replace consumable parts such as electrodes, nozzles, and sealing materials. It takes time to replace these consumable parts because it requires removing and disassembling each part, replacing the consumables, and then reinstalling and connecting all of them and tightening them firmly with screws, etc. As a result, the workability of the plasma cutting machine has been reduced.

The present invention enables a torch including consumable parts such as electrodes, nozzles, and sealing materials to be attached to and detached from a holder with a simple operation by connecting/disconnecting a current supply circuit, a cooling channel, and an operating gas channel. A terrace is provided on the outer periphery of the torch core that is connected to the proximal end, and a male thread is carved on the circumferential surface of the holder core that is provided on the distal end of the holder, and water pipes for cooling and drainage are installed inside the torch core and holder core. A pipe and a fluid supply pipe for cutting operation are provided, and a cap nut is removably fitted around the outer periphery of the abutting portion of the torch core and the holder core, and a claw protruding from the inner periphery of the cap nut is attached to the terrace of the torch core. This is a plasma cutting machine characterized by the fact that it can be freely engaged with.

The present invention will be explained in detail based on embodiments shown in the drawings.

Fig. 1 is a side view of a plasma cutting machine schematically showing one example of implementing the present invention, Fig. 2 is a front view of the torch core, Fig. 3 is a side view of the same, Fig. 4 is a side view of the holder, and Fig. Figure 6 is a front view of the mating surface of the holder and torch core, Figure 7 is a side view of the same, Figure 8 is a side view showing the mating part of the torch, and Figure 9 is a rear view of the same.
Figure 10 is a side view showing the engagement part of the holder, Figure 10 is a back view showing the engagement part of the torch, Figure 11 is a front view showing the engagement part of the holder, and Figure 12 shows the state in which the torch and holder are engaged. FIG.

In the figure, 1 is a torch, 2 is a holder, 3 is a cap nut for connecting/disconnecting, 4 is a nozzle with an opening 5 for plasma discharge and air injection at the center of the tip, 6 is an electrode for plasma discharge, and 7 is a cooling feeder. Water pipe, 8 is the same drain pipe,
9 is a supply fluid pipe for cutting operation, for example, a pipe 10 for supplying air or gas is the core of the torch 1;
2 is a terrace surrounding the outer periphery of the tip of the torch core 10 and having gaps a, a and slopes b, b; 13 is the core of the holder 2 having a male thread 14 on the outer periphery; 15 is a cap nut 3 screwed into the male thread 14; The female threads c and c on the inner circumference of the end of the cap nut 3 protrude from the inner surface of the tip end of the cap nut 3 and pass through the gaps a and a to connect the slopes b and b of the terraces 11 and 12, respectively.
It is a claw having a slope that engages with b.

In this example, to replace the consumable parts, prepare a torch complete with electrodes, nozzles, sealants, etc. in advance, and first grasp and turn the cap nut 3, and screw the screws 14, 15. At the same time as loosening, move the claws c and c along the slopes b and b to a position that fits the gaps a and a, then grasp the torch 1 and pull it forward, and the torch 1 will be released from the holder 2 and the cap nut 3. It can be separated and easily removed. Next, align the gaps a, a at the tip of the prepared torch 1, complete with consumable parts, with the claws c, c of the cap nut 3, and attach the torch 1 to the cap nut 3.
The torch 1 is fixed to the holder 2 by inserting it into the holder 2 and turning the cap nut 3 so that the claws c of the cap nut 3 engage the slopes b and b of the terraces 11 and 12.

As an embodiment of the present invention, a cutout 16 is provided on the inner surface of the cap nut 3 to facilitate passing outside the terraces 11 and 12 on the outer periphery of the end of the torch core 10, and a detent protrusion 17 is provided for alignment. , protrusion 17
A notch 18 of the holder core 13 that engages with the holder core 13, a gasket 19 for sealing cooling water and operating air, and a tracing 20 for moving the plasma cutting machine are provided, respectively. In this embodiment, the protrusions 17 at the tips of the terraces 12 are inserted into the notches 18 of the holder core 13 to engage and align precisely, and then the cap nuts 3 are turned to move the claws c, c into the terraces 11, The mounting operation is quickly completed by moving the gasket 19 on the slopes b and b of 12 until the hardness of the gasket 19 becomes appropriate and tightening it. If the movement range of the claws c, c on the slopes b, b is set to a maximum of 180 degrees as shown in the figure, releasing and tightening can be done with extremely simple operations.

As described above, according to the present invention, the torch 1 can be removed or attached in a short time. That is, since the torch 1 can be fixed and removed using the cap nut 3 attached to the abutting portion of the torch core 10 and the holder core 13, it is possible to easily connect or disconnect them with a one-touch operation.

In addition, in the present invention, when the protrusion 17 and the notch 18 are provided, the cooling water pipe 7, the drain pipe 8, the operating fluid and the electrode power transmission circuit installed inside the torch core 10 and the holder core 13 are further improved. It can be easily and precisely aligned, and it can be easily and accurately aligned.
The structure is such that leakage is prevented and the flow path is completely connected.

[Brief explanation of the drawing]

Fig. 1 is a side view of a plasma cutting machine schematically showing one example of implementing the present invention, Fig. 2 is a front view of the torch core, Fig. 3 is a side view of the same, Fig. 4 is a side view of the holder, and Fig. Figure 6 is a front view of the mating surface of the holder and torch core, Figure 7 is a side view of the same, Figure 8 is a side view showing the mating part of the torch, and Figure 9 is a rear view of the same.
Figure 10 is a side view showing the engagement part of the holder, Figure 10 is a back view showing the engagement part of the torch, Figure 11 is a front view showing the engagement part of the holder, and Figure 12 shows the state in which the torch and holder are engaged. FIG. 1: Torch, 2: Holder, 3: Bag nut,
4: Nozzle, 5: Nozzle opening, 6: Electrode, 7: Water pipe, 8: Drain pipe, 9: Air supply pipe, 10: Torch core, 11, 12: Terrace, 13: Holder core, 14: Male screw, 15 : Female screw, 16: Inner surface cut, 17: Protrusion, 18: Notch, 19: Packing, 20: Copying.

Claims (1)

[Claims] 1 A terrace is provided on the outer periphery of the torch core that is connected to the base end of the torch body, and a male thread is carved on the circumferential surface of the holder core that is provided on the tip end of the holder, and a cooling screw is provided inside the torch core and the holder core. In addition to providing a water supply pipe, a drain pipe, and a fluid supply pipe for cutting operation, a cap nut is removably fitted around the outer periphery of the abutting portion of the torch core and the holder core, and a claw protruding from the inner periphery of the cap nut is provided. A plasma cutting machine characterized in that the torch core can be freely engaged with the terrace.