JPS5964164A - Cutting method of very thick metallic material - Google Patents

Abstract

PURPOSE:To cut a very thick metallic material easily using a heat cutting device of a small capacity by digging the cut part to U-shape bit by bit. CONSTITUTION:The cut part 14 of a very thick metallic material 11 is divided into three small triangles 20a, 20b, 20c and three rhombs 20d, 20e, 20e by four alternate long and two short dash lines parallel to broken lines 7. When the first small triangle 20a is removed by oblique cutting by the frame 13 of a torch 12, a groove 23a having V-shaped sectional form is formed. Similarly, adjoining second triangle 20b and third triangle 20c are removed successively, and three grooves 23a, 23b, 23c having a sectional form of V-shape are formed in parallel in the cut part 14. Then, heat cutting lines 22c, 22d are made along outside slanted faces 24a, 24b of two grooves 23a, 23b until they intersect, and the first rhomb 20d is removed. The second rhomb 20e is removed in the same manner. Remaining rhomb 20f is removed similarly, and the whole of very thick metallic material 11 is cut into two bodies by V-shaped sectional face.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cutting an extremely thick metal material, and more particularly to a method for cutting a portion of an extremely thick metal material by making small steps in a figure 97 shape using a thermal cutting method. .

Conventionally, a gas cutting method has been known as one of the thermal cutting methods, and FIG. 1(a) shows a front view thereof, and FIG. 1(b) shows a side view thereof. In these figures, a metal material 1 is cut at once from a front surface 4 to a back surface 5 by a flame 3 from a torch 2 moving in the direction of arrow A. As described above, the gas cutting method used for cutting metal materials has the advantage that the stroke per unit cut is cheap, and the equipment is lightweight and compact, but on the other hand, the cutting capacity of commercially available equipment that can be easily purchased is limited. For example, if the plate thickness becomes about 100 arms, cutting is impossible.

Plasma cutting is still known as another thermal cutting method. Using this plasma cutting method, metal materials approximately 150 mm thick can be cut, which is also the maximum cutting capacity available with commercially available equipment.

Furthermore, when the gas cutting method and plasma cutting method described above are used in water, their performance is significantly reduced. For example, in the Pu-Wozma cutting method, even if it has the ability to cut 150 sieves in air, the ability to cut in 90 to 100 ttrm is reduced when cutting underwater.

In short, conventional commercially available gas cutting equipment and plasma cutting equipment have a limited cutting capacity, so they cannot be applied to extremely thick metal materials whose plate thickness exceeds a certain level. Cutting required expensive equipment with a correspondingly large cutting capacity.

This invention was made to eliminate the above drawbacks.
It is an object of the present invention to provide a method for easily cutting extremely thick metal materials using a small-capacity thermal cutting device fif.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2(b) is a front view of a method for cutting an extremely thick metal material according to an embodiment of the present invention, and FIG. 2(b) is a side view.

In these figures, 11 is the extremely thick metal material to be cut;
12 is a torch that moves in the direction of the arrow, and 13 is a flame for cutting. That is, in this embodiment, the extremely thick metal material 11
is cut by the gas cutting method, but there is no problem in using the Puwonuma cutting method instead.

When carrying out this invention, first, as shown in FIG. 2 (FN), the part to be cut 14 of the extremely thick metal material 11 is
5 toward the back surface 16 into a figure 7 shape as shown by two broken lines 17, a large triangular slide surrounded by this broken line 17 and the surface 15 of the part to be cut is cut into four lines parallel to the broken lines 17. There are three small triangles on the two-point lead line. Next, the first small triangle 2Oa portion is removed by diagonal cutting using the flame 13 of the torch J2. That is, at one end 21a of the part to be cut 14 shown in FIG. 2(r)), the
), a thermal cutting line 22a is inserted into one side of the first small triangle 2FB from the direction of arrow B by the flame 13, and the freezing torch is applied at a predetermined speed to the other end 21b (second Moving on to Figure (b)). Then, Fv4 similar to the above
Due to the construction, a thermal cutting line 72 is placed on the other side of the first small triangle (b).
Enter b.

As described above, the first small triangular aa section of [4] is removed, and as shown in the perspective view of FIG. Two grooves each having a 7-shaped cross section are formed over the entire length. Afterwards,
The adjacent second triangle part Iib and 3.10 part of the third triangle in FIG. 2(8) are sequentially removed using the same thermal cutting line as above. With this, as shown in FIG. 3(0), the part to be cut 14
Three grooves m, 2:3b, and nc each having a figure-7 cross section are formed in parallel. Next, as shown in FIG. 3 ((1), the outer slopes 2 of the two adjacent grooves z'n and zqb are
Thermal cutting lines 22c and thorns d are drawn in the direction of arrow B along lines 4a and 24b until they intersect with each other. In this case, the thermal cutting line ηc, Zfl is also one end 21a (second
Figure (1)), Figure 3 (b)) to the other end 21'1) ic
It is set up in a row. Two such thermal cutting lines nc.

Due to the row, a portion of the first diamond-shaped section between the two grooves 23b is removed. The second adjacent diamond-shaped part is also removed in the same manner. The state is shown in FIG. 3(e).

Then, as shown in Figure 3(e), the remaining diamond 2Of
' section is also removed in the same way as above. In other words! ￥3 As shown in figure (i:), groove 2al of the remaining two adjacent trees,
Thermal cutting lines 22e, Zf reaching the back surface 16 of the material in the direction of arrow B along the respective outer slopes 24Q, m- of nc,
One end 21a of the part to be cut 14 (Fig. 2 (G), Fig. 3 (1)
) ) to the other end 21b to remove the last diamond-shaped atf part.

As described above, when the last diamond-shaped portion 21f is removed, the extremely thick metal material 11 is cut into two parts, left and right, by the figure 7-shaped cutting surface.

In addition, in the above embodiment, only one torch L was used, but
Use an even number of torches, for example 4 as shown in Figure 4(a).
Use this book as shown in Figure 4 (transportation, No. 1 (7))
-'/-12A and 2nd No) --/-1213 to 1
If the M3 torch X2C and the fourth torch 12D are set as a set and cut by moving them in the direction of the arrow A, the efficiency of the cutting operation will be improved.

In addition, in the above embodiment, the part to be cut 14 is
was divided into six regions, but this number of regions was
It is determined by the device if, the capacity of the plasma cutting devices, and the thickness of the extremely thick metal material.

As described above, according to the present invention, the thermal cutting method is used to cut the extremely thick metal material t1, but since the cutting is performed by digging the part to be cut into a V-shape in small increments, it is possible to Thick metal materials can also be easily cut using commercially available small-capacity thermal cutting equipment.

[Brief explanation of the drawing]

Figure 1 (a) is a front view of the conventional cutting method for metal materials, Figure 1 (t) is a side view of Figure 1 (a), and Figure 2 (F3)
A front view of the method for cutting extremely thick metal materials according to an embodiment of Dove no Shinmei, 1 tur side view of Fig. 2 (to), Fig. 3 <a> to Fig. 3 (f) is an explanatory diagram of the cutting process, FIG. 4(a) is a front view showing the cutting method according to another embodiment, and FIG. 4(b) is a side view of FIG. 4(8). 11...Extremely thick gold μm material, 15...Surface of the part to be cut,
2/a-22f...Thermal cutting line, 2: I...? 3e...
・Ditch, 24F1-24 (l... Slope. Figure 3 (C) Month 14 jLj7 llD 3rd
Figure (d) 11 Figure 3 (e) Figure 3 (f) II Z (JT 1bZ1t)
Figure 4(a) 7r

Claims (1)

[Claims] (1) The process of diagonally cutting the surface of the part to be cut of an extremely thick metal material using a thermal cutting method to create multiple 7-shaped grooves with a C cross section in parallel, and cutting the grooves between two adjacent pieces of wood on the outside of each of these grooves. A method for cutting extremely thick metal materials, which includes the step of removing by a thermal cutting method that crosses along the slope.