JP3812116B2 - Arc machining torch and arc machining electrode - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an arc machining torch provided with a cooling path such as air cooling or water cooling to an end portion of an electrode material.
[0002]
[Prior art]
As an arc machining torch for cooling by providing a cooling path to an electrode base material to which an electrode material is attached, the conventional one employs the following two cooling structures.
[0003]
The first one is a central axis of the electrode base material and a hole for embedding the electrode material in the outer part, and a cooling path is provided inside the electrode base material. The electrode material is indirectly cooled.
[0004]
The second one is a cooling path that is provided with a through-hole into which the electrode material is fitted in the central axis of the electrode base material and on the outer portion, and that is concentric with the central axis and communicates with the through-hole inside the electrode base material. The end of the electrode material is directly cooled by the cooling path.
[0005]
[Problems to be solved by the invention]
The conventional configuration has the following problems.
[0006]
In the first configuration, although it is easy to fix and hold the electrode material, since the electrode material is indirectly cooled, there is a problem of shortening the life of the electrode material.
[0007]
In the second configuration, although the electrode material can be sufficiently cooled, the electrode material is energized in a direction away from the electrode base material by cooling water or cooling air. There was a problem that the material shifted from the electrode substrate.
[0008]
Further, in the case where the cooling path is provided on the central axis of the torch, when the electrode material moves in the direction of the torch body, the torch body may be damaged by an arc from the electrode material.
[0009]
An object of the present invention is to solve the above-mentioned problems and to provide an arc machining torch capable of extending the life of an electrode material.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, an electrode base material provided with a cooling path therein, an end portion positioned on the cooling path of the electrode base material, and a side opposite to the end portion facing the outside of the torch, the torch central axis comprising an electrode material provided on the electrode substrate while arranged above the interior of the orifice disposed on the torch central axis of the electrode substrate, a cooling path through the orifice in which is decentered from the torch central axis is there.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
According to the above configuration, the end of the electrode material is directly cooled, so that the life of the electrode can be extended, and the solid portion of the orifice is arranged on the central axis of the torch, so that even when the electrode material is displaced, The movement of the electrode material can be restricted at the solid portion, and the arc can be received at the solid portion, so that damage to the torch body can be prevented.
[0012]
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
1 is an electrode base material made of copper or copper alloy, 2 is an electrode material made of a high melting point metal such as hafnium, zirconium, or tungsten inserted at the tip of the electrode base material, 3 is opposite to the electrode material insertion of the electrode base material Cavity part provided on the side, 4 is an orifice made of copper or copper alloy or the like inserted into the electrode base material from the cavity part to cool the end of the electrode material, 5 is formed by an orifice inside the electrode base material 6 is an electrode material inserted into an electrode base material, an electrode formed by inserting an orifice, 7 is a torch body to which the electrode can be attached and detached by screwing or the like, 8 is a central axis of the electrode, 9 is an end of the electrode material The cooling path through which the cooling path communicates does not pass through the center axis of the electrode without passing through the center axis of the electrode in the electrode base material, and a part 10 on the central axis of the orifice is provided to provide the drift part of the cooling path. It is an innocent part.
[0013]
In the arc machining torch according to the present embodiment, a cooling path is provided so as to lead to the end of the electrode material in order to extend the life of the electrode that can be attached to and detached from the torch body.
[0014]
In addition, by providing a solid part on the central axis of the orifice, when the electrode material is detached from the electrode base material and moves in the direction of the torch body during arc generation, the movement of the electrode material can be prevented by the solid part. Body burnout can be prevented. The thickness of the solid part in the central axis direction is 2 mm or more. When the thickness of the solid part is less than 2 mm, the torch body may be burned out by penetrating the solid part by an arc of the electrode material.
[0015]
【The invention's effect】
According to the present invention, in order to decenter the cooling path leading to the end of the electrode material from the central axis, a solid portion is provided on a part of the central axis of the orifice to prolong the life of the electrode, and the electrode is generated during arc generation. This has an excellent effect of preventing burning of the torch body when the material is detached from the electrode substrate and moved toward the torch body.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an arc machining torch according to an embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 Electrode base material 2 Electrode material 3 Cavity part 4 Orifice 5 Cooling path 6 Electrode 7 Torch main body 8 Center axis 9 Drift part 10 Solid part

Claims (2)

An electrode base material provided with a cooling path inside, an end portion located on the cooling path of the electrode base material, and an electrode base disposed on the torch central axis with the opposite side facing the outside of the torch An arc machining torch comprising an electrode material provided on a material and an orifice disposed on the torch central axis inside the electrode base material , wherein a cooling path is decentered from the torch central axis by the orifice . An electrode base material provided with a cooling path inside, an end portion located on the cooling path of the electrode base material, and an electrode base disposed on the torch central axis with the opposite side facing the outside of the torch An electrode for arc machining, comprising an electrode material provided on a material and an orifice disposed on the central axis of the torch inside the electrode base material, wherein the cooling path is eccentric from the central axis of the torch by the orifice .

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