JPH04351269A - Cutting torch device - Google Patents

Abstract

PURPOSE:To perform stable gas cutting for a long time by constituting a cutting torch freely selectively for the erect position and the inclined position. CONSTITUTION:In a cutting torch device 1 where a gas stream is jetted toward a work W from a nozzle tip 17 provided on the tip of the cutting torch 13 to perform drilling on the work W, the cutting torch 13 is constituted freely selectively for the erect position and the inclined position. Consequently, at the time of performing drilling, dross is discharged to a place other than the cutting torch tip till the work W is jetted with the gas stream and pierced at the inclined position, blowing back can be prevented and stable gas cutting for a long time can be performed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting torch device for a cutting machine such as a plasma cutting machine or a gas cutting machine.

0002

2. Description of the Related Art Conventionally, a cutting torch device 101 in a plasma cutting machine as a cutting machine, for example, is installed above a workpiece W as shown in FIG.
It is equipped with 03. An electrode 105 extending vertically is provided at the axis of the cutting torch 103, and a nozzle tip 1 is provided at the tip (lower end) of the cutting torch 103.
07 is provided.

With the above configuration, when plasma drilling is performed on the workpiece W using the cutting torch 103 of the cutting torch device 101, an arc discharge 109 is generated in the electrode 105, and plasma gas G flows from the nozzle tip 107 into the workpiece W. The workpiece W is irradiated with plasma to perform plasma drilling.

0004

[Problems to be Solved by the Invention] By the way, when plasma drilling is performed on the workpiece W using the cutting torch device 101 having the above-described configuration, the nozzle is not activated during the drilling process from the start of drilling until the hole is penetrated. Workpiece W melted by high-temperature plasma gas G blown out from chip 107
The metal dross D is blown back upward, ie, toward the nozzle tip 107 at the tip of the cutting torch 103, by the pressure of the plasma gas G.

Since the metal dross D is blown back from the nozzle tip 107 and the cutting torch 1 because it is high-temperature molten metal,
There was a problem that caused an accident in which the lower part of the 03 was burnt out.

[0006] Furthermore, there are many problems in which the outlet of the nozzle tip 107 is deflected or blocked, which causes an abnormality in the arc discharge 109 between the electrode 105 and the nozzle tip 107, and abnormalities due to damage to the electrode 105 and the nozzle tip 107. There was a great risk of wear and tear and internal burnout. Because of these problems, it is necessary to constantly inspect the electrode 105 and the nozzle tip 107 for damage during drilling, and it has been difficult to perform the drilling process continuously and stably for a long period of time.

An object of the present invention is to improve the above-mentioned problem by preventing abnormal wear of the nozzle tip and electrode and burnout of the cutting torch caused by dross blowing back onto the cutting torch.
An object of the present invention is to provide a cutting torch device that enables stable cutting for a long time.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a cutting torch for drilling a hole in a workpiece by injecting a gas flow toward the workpiece from a nozzle tip provided at the tip of the cutting torch. The apparatus is characterized in that the cutting torch is selectively provided in an upright position and an inclined position.

[0009]

[Operation] By adopting the cutting torch device of the present invention, when drilling a hole in a workpiece with this cutting torch device, the cutting torch is held in an inclined position during drilling, so that the gas flow is perpendicular to the workpiece. By irradiating the workpiece with the gas flow in a manner that prevents the dross from being blown back into the cutting torch, the dross that is discharged until the hole is penetrated is discharged to a place other than the tip of the cutting torch.

Further, during cutting, the cutting torch is selected from an inclined position to an upright position so that the cut surface of the work is at a right angle, and the cutting torch is held at right angles to the work.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, a cutting torch device 1 in, for example, a plasma cutting machine is provided above a workpiece W to be cut.

This cutting torch device 1 is equipped with a fixed base plate 3, and fixed side guide rollers 5R, 5L are arranged at appropriate intervals in the lower part of the base plate 3 at approximately the center.
is supported, and a fixed side guide roller 5 is supported by a pressure spring 7 at the upper part of the base plate 3 at approximately the center.
A vertically movable roller 9 pressurized in directions R and 5L is supported.

Guide grooves 5 are provided in the circumferential direction on the upper side of the fixed side guide rollers 5R, 5L and on the lower side of the vertically movable roller 9.
A tilted guide plate 11 having a freely tiltable arc R1 and an arc R2 is held between the guide grooves 5V and 9V. A cutting torch 13 extending in the vertical direction is clamped to the inclined guide plate 11 by a torch clamp 15. Furthermore, a nozzle tip 17 is provided at the tip (lower end) of the cutting torch 13.

A fluid cylinder 21 is supported by a pin 19 approximately at the center of the left side of the base plate 3 . A piston rod 23 is telescopically inserted into the fluid cylinder 21, and the tip of the piston rod 23 is connected to the inclined guide plate 11 with a pin 25.

On the left side of the base plate 3 is an upright stopper 2 for positioning the cutting torch 13 when it is upright.
At the same time, a tilt stopper 29 is attached to the right side of the base plate 3 for positioning the cutting torch 13 when it is tilted. In addition, in FIG. 1, the processing point WA of the workpiece W is at R1 of the inclined guide plate 11.
is the center of rotation at a distance of .

With the above configuration, as shown in FIG. 1, the inclined guide plate 11 is in contact with the upright stopper 27, and the cutting torch 13 is in the upright position. In the state shown in FIG. 1, when the fluid cylinder 21 is actuated and the piston rod 23 is projected to the right in FIG.
The inclined guide plate 11 is driven via the pin 25 and begins to move in the direction of the inclined stopper 29.

The inclined guide plate 11 is guided by the fixed guide rollers 5R and 5L and moves in an arc around the rotation center point WA located at a distance of radius R1, resulting in the state shown in FIG. The cutting torch 13 stops when it hits the tilt stopper 29, and the cutting torch 13 tilts. When the inclined guide plate 11 is in motion and in the position shown in FIGS. 1 and 2, the fixed guide roller 5R
, 5L, and is constantly guided by a vertically movable roller 9 having a groove 9V in the circumferential direction.
R, 5L, fixed side guide roller 5R,
Exercise using 5L as a reference guide.

As shown in FIG. 2, when drilling is performed with the cutting torch 13 tilted relative to the workpiece W, the dross D is discharged in the direction of the arrow 31 from the start of drilling until the hole is penetrated. , it is possible to prevent the dross D from being blown back toward the nozzle tip 17 and the cutting torch 13.

In the state shown in FIG. 2, when the piston rod 23 is retracted by the operation of the fluid cylinder 21, the inclined guide plate 11 begins to move toward the upright stopper 27 via the pin 25, and as shown in FIG. As shown above, the inclined guide plate 11 is guided by the fixed guide rollers 5R, 5L and the groove 9V of the vertically movable roller 9, and performs an arcuate motion about the rotation center point WA located at a distance of radius R1. The cutting torch 13 hits the vertical stopper 27 and stops, and the cutting torch 13 stands upright.

Since the inclined guide plate 11 performs an arcuate motion with a radius of R1, the cutting torch 13 held by the torch clamp 15 clamped to the inclined guide plate 11 moves around the rotation center point WA located at a distance of R1. Perform a circular motion.

Further, the tip of the nozzle tip 17 provided on the cutting torch 13 is located away from the surface of the workpiece W, that is, from the rotation center point WA at a distance R1 of the inclined guide plate 11 set on the surface of the workpiece W. When the cutting torch 13 is erected (the state shown in Fig. 1),
The center position of the plasma gas flow blown out from the nozzle tip 17 when it is tilted (the state shown in FIG. 2) is the same, and after drilling the hole at the tilted position, the cutting torch 13 is erected to cut smoothly. Can be done. Therefore, dross D
It is possible to prevent abnormal wear and burnout of the nozzle tip 17 and electrodes caused by the blowback of the cutting torch 13, and stable cutting can be performed for a long time. As a result, the cutting operation is performed unmanned.

It should be noted that the present invention is not limited to the embodiments described above, but can be implemented in other embodiments by making appropriate changes. In this embodiment, an example of a cutting torch device 1 in a plasma cutting machine was explained, but
It is also compatible with cutting torch devices such as gas cutting machines and laser processing machines.

[0024]

[Effects of the Invention] As understood from the above description of the embodiments, according to the present invention, since the structure is as described in the claims, the cut surface of the workpiece can be cut at right angles. In addition, it is possible to prevent abnormal wear and burnout of the nozzle tip and electrode due to dross blowing back onto the cutting torch. In addition, stable cutting can be performed for a long time. Eventually, the cutting operation will be performed unmanned.

[Brief explanation of the drawing]

FIG. 1 is a front view of a cutting torch device in a plasma cutting machine according to the present invention.

FIG. 2 is an explanatory diagram illustrating the operation of the present invention.

FIG. 3 is a front view of a cutting torch device in a conventional plasma cutting machine.

[Explanation of symbols]

1 Cutting torch device 3 Base plate 5R, 5L Fixed side guide roller 9 Vertically movable roller 11　Incline guide plate 13 Cutting torch 15 Torch clamp 17 Nozzle tip 27 Upright stopper 29 Incline stopper W Work WA Rotation center point D Dross

Claims (1)

[Claims] 1. A cutting torch device for drilling a hole in a workpiece by injecting a gas flow toward the workpiece from a nozzle tip provided at the tip of the cutting torch, wherein the cutting torch is set in an upright position and an inclined position. A cutting torch device characterized in that it is provided in a freely selectable position.