JPH05245647A - Plasma working device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a plasma processing apparatus that does not increase the number of power supplies even when the number of plasma torches increases when cutting and welding a workpiece. [Structure] A plurality of plasma torches are connected to one power source through a plasma control unit. As a result, it is not necessary to increase the power supply even if the number of plasma torches used increases.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma processing apparatus configured to operate a plurality of plasma torches simultaneously or selectively with a single power source.

[0002]

2. Description of the Related Art A plasma processing method has been employed in which a plasma cutting torch or a plasma welding torch is used to perform processing such as cutting or welding on a workpiece such as a steel plate or a stainless steel plate. A plasma processing apparatus for performing the above plasma processing method is configured by connecting one plasma torch to one power source. Therefore, when performing plasma processing using a plurality of plasma torches, the same number of power supplies as the number of plasma torches are used.

On the other hand, a numerically controlled cutting device for mounting a gas cutting torch or a plasma cutting torch to cut a workpiece into a desired shape is adopted. In some of the numerically controlled cutting devices, a plurality of cutting torches are mounted so that a plurality of figures can be cut at the same time. If the installed cutting torches are plasma cutting torches, a number of power supplies equal to the number of plasma cutting torches are used.
Further, even in the case where two plasma welding torches are mounted on a truck to weld a workpiece, two power supplies equal to the number of plasma welding torches mounted on the truck are used.

[0004]

As described above, in the plasma processing apparatus in which one power source and one plasma torch are set, when a plurality of plasma torches are used, the number of plasma torches increases. As a result, the number of power sources increases. Therefore, there is a problem that the space required for installing the power supply becomes large.

An object of the present invention is to provide a plasma processing apparatus which does not increase the number of power supplies even when a plurality of plasma torches are used.

[0006]

In order to solve the above-mentioned problems, a plasma processing apparatus according to the present invention has a plurality of plasma torches connected to a single power source through respective plasma control units, and these plasma torches are connected. Are configured to operate simultaneously or selectively.

[0007]

According to the above plasma processing apparatus, since a plurality of plasma torches are connected to one power source through the plasma control unit, it is not necessary to increase the number of power sources even if the number of plasma torches used increases. Absent. Therefore, it is not necessary to take up a large installation space for the power supply.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the plasma processing apparatus will be described below with reference to the drawings. FIG. 1 is a perspective view of a numerically controlled cutting device to which a plasma cutting device is applied, and FIG. 2 is a block diagram of the plasma cutting device. The plasma processing apparatus according to the present embodiment is mounted on a numerically controlled cutting device B to be cut into a material C to be cut.
It is configured as a plasma cutting device A that cuts the plasma torch 1 and is configured by connecting two plasma torches 3a and 3b to one power source 1 through a plasma control unit 2. The number of plasma torches connected to the power source 1 is not limited to the above two, but is set according to the rated output of the power source 1.

The power source 1 is a connected plasma torch (3
It has a rated output corresponding to the number of a, 3b) and the current value. The current value applied to the plasma torch (3a, 3b) changes according to the material and plate thickness of the material C to be cut. For example, when the material C to be cut is a stainless steel plate having a plate thickness of 40 mm, the current applied to the plasma torch (3a, 3b) is
It is 40A. Therefore, the rated output of the power supply 1 in this embodiment is set to 80 A or higher. As described above, the rated output of the power source 1 is set to a value that can satisfy these conditions when the conditions such as the condition of the material C to be cut and the number of plasma torches (3a, 3b) are set. ..

The plasma control unit 2 includes a plasma torch 3a,
The control circuit is provided corresponding to the number of 3b, and the plasma torches 3a and 3b are simultaneously or selectively operated by a command from a numerical control device 14 described later.

Each of the plasma torches 3a and 3b has an electrode (not shown) therein, and is configured to cut the material C to be cut by generating a main arc between the electrode and the material C to be cut. A plasma cutting torch that is commonly used at present is used.

Next, the structure of the numerically controlled cutting device B will be described. A gate-shaped girder 12 is movably mounted on a pair of rails 11 laid in parallel. A traverse rail 12a is fixed to the girder 12 in a direction orthogonal to the rail 11, and two traverse saddles 13a and 13b are attached to the rail 12a so as to traverse. The plasma torch 3a is mounted on the traverse saddle 13a, and the plasma torch 3b is mounted on the traverse saddle 13b. The power source 1 is mounted on the girder 12, and the power source 1 and the plasma torch 3a,
3b is connected via the plasma control unit 2 and cables 1a and 1b. The girder 12 also has a numerical controller 14
Is mounted, and the girder 12 and the traverse saddles 13a and 13b can travel or traverse in a predetermined direction and at a predetermined speed, respectively, in response to a command from the numerical controller 14.

In the above structure, the numerical control device 14 is supplied with information such as cutting speed and graphic information when the material C to be cut is cut, and the input graphic is used as the plasma torch 3a.
Information on whether to disconnect by 3b or simultaneously is input. Then, input the disconnection start signal,
The control circuits corresponding to the plasma torches 3a and 3b operate simultaneously or selectively based on the information input from the numerical controller 14 to the plasma controller 2. Then, commands are sequentially generated from the numerical controller 14, and the girder 12 and the traverse saddles 13a and 13b travel or traverse at the commanded speed in the commanded direction. In this process, plasma torch 3a,
The material C to be cut is caused by simultaneous or selective operation of 3b.
It is possible to cut a desired figure from.

In the above embodiment, the case where the material C to be cut is cut has been described. However, the plasma processing apparatus, whether it is a cutting apparatus or a welding apparatus, does not substantially change. Plasma torch 3 in the above embodiment
By using a and 3b as welding torches, it is possible to carry out welding work on the material to be processed.

[0015]

As described in detail above, in the plasma processing apparatus according to the present invention, since a plurality of plasma torches are connected to one power source through the plasma control unit, it is possible to perform plasma processing when processing a workpiece. It is not necessary to increase the number of power supplies even if the number of torches is increased. For this reason,
It has the features that the work space does not decrease with the increase of the plasma torch and the work efficiency does not decrease.

[Brief description of drawings]

FIG. 1 is a perspective view of a numerically controlled cutting device to which a plasma cutting device is applied.

FIG. 2 is a block diagram of a plasma cutting device.

[Explanation of symbols]

A is a plasma cutting device, B is a numerically controlled cutting device, C is a material to be cut, 1 is a power source, 2 is a plasma control unit, 3a and 3b.
Is a plasma torch, 11 is a rail, 12 is a girder, 13a,
13b is a traverse saddle and 14 is a numerical control device.

Claims (1)

[Claims] 1. A plasma processing apparatus characterized in that a plurality of plasma torches are connected to one power source via respective plasma control units, and these plasma torches are operated simultaneously or selectively. ..