JPS58173063A - Method and device for cutting crop in gas cutter for continuous molding - Google Patents

Abstract

PURPOSE:To cut a crop smoothly without damaging a cutting torch by interrupting the cutting so as to leave a partly uncut part after starting cutting of the crop and fixing the torch carriage in a way that the carriage can follow up the bending of an ingot. CONSTITUTION:The cutting of the crop 17 of an ingot 3 conveyed with a roll table 2 is started and a torch carriage 6 is stopped in the position where the uncut part attains a specified length. A vertical moving cylinder 12 is operated to press stick and fix a press sticking head 13 to the ingot 3; at the same time, the cutting is stopped and the clutch of a driving device 8 is disengaged to free the carriage 6 on a carriage rail 9. The ingot 3 and the body are moved to the position of the crop carriage. Even if the ingot 3 is bent by oscillation or the like during this time, the carriage 6 slides on the rail 9 by following up the bending of the ingot 3. The torch 7 is thus held on the cutting groove 18 of the ingot 3 and the generation of deviation is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (2) The present invention relates to a method and apparatus for cutting 11" top crops or test pieces of continuously cast long slabs, and more specifically, When a slab is moved with a portion left uncut in the width direction, and the remaining portion is re-cut at a predetermined position to collect the pieces, the center of the cutting torch may come off from the kerf when cutting was interrupted due to the bending of the section. The present invention relates to a method and apparatus for cutting a single crop by preventing re-cutting from one frame to being started.

Continuously cast slabs (hereinafter referred to as slabs) are rolled using high-temperature molten metal rolls and cut into appropriate lengths by a cutting device fK. The quality of these slabs varies depending on the distribution of non-metallic substances in the bath melt.
Therefore, for the purpose of inspecting the inside of the slab, it is generally done to cut the tip of the slab with a test piece (17).

When cutting a crop or a test piece from a cast slab, conventionally, as shown in JP-A No. 47-25782, a cut-out part is provided in the cutting width direction of the slab, and the cut part is cut into a cropped slab. A method has been developed in which the cutting is connected and transported from one frame to the cropping cart position, and re-cutting is started on the cropping cart, and the uncut portion is completely cut off and dropped onto the cropping cart. However, in the above method, apart from the case of wide slabs, [1] In the case of narrow slabs or blooms, in the first stage of building construction as shown in Fig. 1 (as shown in Fig. 11, a cutting torch b is applied to the slab When cutting is temporarily stopped with a small portion left uncut, and the cutting machine body and slab a are conveyed synchronously to the cropping cart position, there may be vibrations during transportation or temperature differences between the outside and inside of the slab. (0) causes the slab a to bend.As a result, there is a misalignment between the cutting torch b and the cutting end point of the slab as shown in (I)). When the T-cutting torch a starts the second stage of re-cutting, it is not on the kerf but on the uncut slab (IC). Therefore, if you start cutting again in the state shown in Figure b1, it will become a piercing state and the slag will blow up, and the cutting torch a
It had the disadvantage that it would melt away.

The present invention relates to a completely new technology that improves the drawbacks of the conventional 2nd grade technology.

An embodiment of the present invention will be explained with reference to figures.
In the figure, the main body of the gas cutting machine is for cutting the slab 6 conveyed by the Hi roller table 2, and has a rock body drive #J device 4 at the rear and a section for cutting the slab 5 at the bottom. A clamping device 5 is provided which can move the book (5) body 1 in synchronization with the slab 6 by crimping the claws. Reference numeral 6 denotes a torch carriage installed at the front of the main body 1, which has a cutting torch 7, is equipped with a drive device 8 incorporating a motor and a clutch, and is attached to a rail 9 for movement. There is. 1
0 is a device for detecting the cut end face of the slab 6 cut by the cutting torch 7.

11 is a carriage flange device provided with a torch carriage 6VC, and is configured so that it can be crimped and fixed to the crimping spatula (13Y) at the tip by upper and lower cylinders 12. 14 runs on the main body 1. A crop cart 15 is installed at the lower end of the running rail 14 so as to be movable in a direction intersecting the casting line.

Historically, the traveling rail 14 is provided with a position detection limit switch 16 that is activated whenever the slab 6 and the main body 1 move onto the black (6) wheel truck 15.

In the case of cutting and collecting crops using one device constructed as described above, the explanation will be given with reference to FIG. The slab 6 is moved in synchronization with the slab 6, and the end face detection device 10Vc
The cutting of the crop 17 of the slab 6 is started by detecting the end face of the slab. and a pulse counter and a series of sequence times u
The torch carriage 6 is stopped at a position where the uncut portion becomes a constant length of approximately 5 mm (mu) as shown in Figure 81. Next, the upper and lower cylinders 12 are operated to fix the layer head 16 on the slab 5 & IIE, and cutting is stopped, and the clutch of the drive device 8 is released (7) to move the torch carriage 6 onto the carriage rail 9. make it free. In this state, the slab 3 and the main body 1 are moved to the position where the cropping cart 15 is installed, but since the torch carriage 6 is fixed to the slab 6 by the carriage clamp device 11, the torch carriage 6 is not fixed during the movement. Even if the slab 6 is bent due to vibration, temperature difference, etc., the torch carriage 6 follows the bending of the slab 6 and slides on the carriage rail 9. Therefore, as shown in Figure b1, the cutting torch 7 is always held on the cut groove 1B of the slab 6 and does not shift. When the slab 6 and main body 1 are moved onto the cropping cart 15, the position detection 11 and the mitsu switch 16 are activated. is activated to release the alternate layers formed by the crimping head ''16, and the cutting and pasting torch 7 starts cutting again to cut the crop 17.
The crop 17 (8) is completely separated and the crop 17 (8) is dropped onto the crop cart 15.

As mentioned above, in crop cutting, the present invention interrupts the cutting by leaving a certain length of the slab uncut, and at the first position, the torch carriage follows the bending of the YM piece using the carriage clamp device. The relative positional relationship between the kerf of the slab and the cutting torch is always constant because it is fixed so that even four cutting torches are always held above the kerf due to vibrations while the slab is being transported. . Therefore, it is possible to completely prevent the piercing condition caused by the misalignment of the cutting torch and the kerf when re-cutting is started on the crop table as in the past, and this can damage the cutting torch. The crop can be cut smoothly without any problems, and there is no need to provide an arm or the like on the main body of the cutting machine to hold the crop (9) when the crop is placed on the crop cart and cut and dropped. It has characteristics.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of conventional crop cutting force, Figures 2 and 6
The figures are a plan view and a front view of the cutting device according to the present invention, FIG. 4 is an explanatory view showing a cutting torch portion, and FIG. 5 is an explanatory view of the cutting method of the present invention. 1 is the cutting machine body, 6 is the slab, 5 is the clamp device,
6 is a torch carriage, 71ts cutting torch,
8 is a drive device, 9 carriage rails, 11 is a gear ridge clamp device, 12 is an upper and lower IJ cylinder,
16 is a crimping head, 15 is a crop truck, 1
8 is a kerf. (10) 1st (a) (b)

Claims (2)

[Claims] (1) In a crop cutting method in which a gas cutter is moved synchronously with the continuously cast slab to cut off the crop at a predetermined position, after the crop cutting has started, a part of the cutter is provided and the cutting is interrupted. At the same time, the torch carriage follows the bending of the slab by the carriage clamp device.
A crop cutting method in a continuous casting gas cutting machine, which is characterized in that the cutting torch is always held above the kerf groove, and after the slab is moved to a predetermined position, re-cutting is started to cut the slab. . (1) (2) Machine running rails are laid on both sides of the roller table that conveys the slabs to be continuously cast, and a cutting machine body that can run on the rails is provided, and the cutting machine body is equipped with the slabs to be conveyed. A clamping device capable of clamping the torch carriage is provided and the carriage rail F can be slid freely:
), and a crop cart is provided at a predetermined position below the running rail and roller table.In the crop cutting device, a cutting torch is installed on the torch carriage, and a crimping head is crimped onto the slab. 1. A crop cutting device for a continuous casting gas cutting machine, characterized in that a carriage clamping device capable of clamping a torch gear + 1 joint to a slab is provided.