JPH0235413Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement of a plasma cutting torch.

Prior art and its problems A plasma cutting torch generally generates a plasma arc to cut steel, aluminum, copper plates, etc. at high speed. A plasma cutting torch a like this is used. Such a plasma cutting torch a is equipped with a remote control switch b to remotely control the cutting power supply, and the cutting torch a is moved in accordance with the score line d drawn on the workpiece c. Cut the cutting material c into an arbitrary shape. However, in conventional methods such as this, when cutting the material c by moving the upper surface of the material c, the head of the torch a is carefully watched and moved so as to match the score line d. It was necessary and troublesome. Also, the score line d
Therefore, when the moving path of the cutting torch a is changed, the cutting line often deviates from the score line d, which hinders smooth cutting work.

Purpose of the invention The present invention was proposed to solve the above-mentioned problems, and its purpose is to make cutting work easier by reliably eliminating misalignment of the cutting line when cutting with a plasma cutting torch. This is what I did.

Means for Solving the Problems The present invention is proposed to achieve the above object, and the shape of the shield cup is a polygon with at least the corner portion of the tip portion protruding or recessed. It is characterized by:

Therefore, the plasma cutting torch of the present invention is a polygonal pyramid with a tapered tip of the shield cup, a shield cup whose entirety is formed into a polygon as shown in the embodiment, or a shield cup with a polygonal pyramid shape as shown in the embodiment. This concept includes forming only the tip of the polygon into a polygon.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing an embodiment of the present invention.
In the figure, 1 is a plasma cutting torch;
2a indicates a shield cup made of ceramic, heat-resistant resin, or the like.

The overall shape of this shield cup 2a is a regular hexagonal shape with protruding corner parts, and as shown in FIG. The electrode tip 3 is positioned so as to match the score line d drawn on the surface of the material to be cut, and the surface of the material to be cut is moved by the cutting torch 1 to cut the material.

FIGS. 3 and 4 show other examples of the plasma cutting torch of the present invention, in which the overall shapes of shield cups 2b and 2c are formed into a regular octagon and a square shape, respectively. In these cases, the protruding corner of the shield cup is aligned with the score line d as shown in FIG. 2, and the cutting torch 1 is moved to cut the material.

Further, FIG. 5 shows still another example of the present invention, in which a corner portion d of a polygonal shield cup 2d is shown.
1 to d6 are recessed, and the tip 3 is positioned by aligning the corner portions d1 and d4 of the opposing portions with the score line d as shown in the figure, and the cutting torch 1 is placed on the cutting target. The material to be cut is cut by moving the surface of the material. As shown in the figure, if the shield cup is configured with a recessed corner, even if not all corners are recessed, at least one pair of corner parts located opposite each other It is fine as long as it is notched.

In the above embodiments, the shield cup may be fixed to the head of the cutting torch, but it may also have a structure in which the rotation angle is adjustable. In the latter case, there is an advantage that the torch can be guided accurately and easily even when the score line is bent or curved.

Effects of the Invention As can be understood from the above explanation, according to the plasma cutting torch of the present invention, the shape of the shield cup is a polygon with at least the corner portion of the tip portion protruding or recessed. Therefore, during plasma cutting work, it is extremely convenient to align the opposite corner portions of the tip of the shield cup with the score line to accurately guide the torch.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the plasma cutting torch of the present invention, FIG. 2 is a diagram illustrating how to use the shield cup shown in FIG. 1, viewed from direction A, and FIG. FIG. 4 is an embodiment diagram of another example of the present invention.
FIG. 5 is a diagram illustrating how to use a torch according to still another example of the present invention, and FIG. 6 is a diagram illustrating how a conventional plasma cutting torch is used. Explanation of symbols, 1...Plasma cutting torch, 2
a, 2b, 2c, 2d...shield cup, a
1, a2, d1, d4...Protrusions and recessed parts provided at opposing parts.

Claims (1)

[Claims for Utility Model Registration] 1. A plasma cutting torch characterized in that the shape of the shield cup is a polygon with at least the corner portion of the tip portion protruding or recessed. 2. The plasma cutting torch according to claim 1, wherein the rotation angle of the shield cup is adjustable.