JPH0323063A - Method for cutting off rectangular plates from regular size steel plate - Google Patents

Abstract

PURPOSE:To cut off small size steel plates having different lengths at the same time by executing cutting work to Y direction only with a cutting torch according to shifting quantity of a cross beam and putting out flames in the other cutting torches shifted accompanying the above torch. CONSTITUTION:The shifting quantity of the cross beam 4 to X direction is inputted to a gas supplying control unit 13, and by shutting a flow cutoff valve 12 to a second and third torches 7b, 7c, the flames are put out. Therefore, at the time of shifting a torch supporting table 6 to the Y direction, only a first torch 7a executes the cutting work. When the shifting quantity of the torch supporting table 6 to the Y direction becomes the prescribed quantity, by working a running control unit 10, the supporting table 6 is reversely shifted and the flow cutoff valve 12 is shut and the supporting table 6 is returned back to the original point under no flame condition. Then, these torches are ignited by working the gas supplying control unit 13 and the beam 4 is shifted to the X direction with the running control unit 10. When an integrated shifting quantity becomes the prescribed value, shifting of the beam 4 is stopped and the supporting table 6 is shifted to the Y direction and the cutoff valve 12 to the first and third torches 7a, 7c are shut and the cutting work to the Y direction is executed with only the second torch 7b.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for inputting a cutting method for cutting small strip-shaped steel plates from a fixed-length steel plate using an automatic fusing machine.

<Prior art> Conventionally, when cutting a large number of small steel strips from a fixed-length steel plate using an automatic fusing machine, fusing torches were fixed at predetermined intervals on a torch support that moved relative to the workpiece mounting table. By moving the workpiece (steel plate) held on the workpiece mounting table and the welding torch relative to each other in one direction,
A strip of a predetermined width is first formed, and then this strip is cut to a predetermined length to form a small steel plate of a predetermined size. Also, after moving the torch support stand or workpiece mounting stand in the X direction, move it in the Y direction, move it again in the X direction, and then move it in the Y direction.
It has also been proposed that the cutting line is shaped into a key shape by moving back in the direction to cut out a small steel plate with a short cut.

[Problem to be solved] However, when the strip is formed and then cut to a predetermined length, the number of man-hours required for cutting increases, and there are problems in that it is difficult to obtain right angles due to the effects of heat on the steel material. Ta.

In addition, with conventional systems in which the torch support or workpiece mounting table is moved in two directions (X-Y), the cutting flame remains lit during the entire process, which has a large thermal effect on the steel material. Moreover, there was the problem that only small steel plates of the same shape could be cut.

The present invention has been made with attention to such points, and an object of the present invention is to make it possible to simultaneously cut out small strip-shaped steel plates of different shapes with little thermal influence.

<<Means for Solving the Problems>> In order to achieve the above object, the present invention provides flow path cutoff valves for each of the fusing gas supply paths that supply fusing gas to a plurality of fusing torches arranged on a 1-chi support base. The flow path cutoff valve is configured to be able to be individually controlled to open and close based on the output from the gas supply control device, and distance information is used to determine the amount of movement of the torch support stand or workpiece mounting stand from the origin in the X direction. The torch support stand or The workpiece mounting table is moved in the Y direction every summer, and during the return movement in this Y direction, the flow path cutoff valve is closed and operated to shut off at least the cutting oxygen path to all of the welding torches. When the torch support stand or the workpiece mounting stand returns to its origin in the Y direction, the flow path cutoff valve is opened and activated, the welding torch is ignited, and movement in the X direction is resumed. It is characterized by what it did.

(Function) In the present invention, a flow path cutoff valve is arranged in each of the fusing gas supply paths that supply fusing gas to a plurality of fusing torches arranged on a torch support, and the flow path cutoff valve is connected to the gas supply control device. It is configured to be able to individually control opening and closing based on the output of
Based on this distance information, a program preset in the gas supply control device is operated to keep at least the flow path cutoff valves in a conductive state, and move the torch support stand or workpiece mounting stand in the Y direction. During the return movement in the Y direction, the flow path cutoff valve is closed to close at least the cutting oxygen passages to all the welding torches. When the torch support stand or workpiece mounting stand returns to its origin in the Y direction, the flow path cutoff valve is opened and the welding torch is ignited, and movement in the X direction is resumed. Y
During the forward and backward movement, only the necessary torches are lit, and only those torches perform the cutting operation. During the return trip in the Y direction, the cutting oxygen flames from all the torches are extinguished, so the steel plate will not be exposed to the cutting oxygen flame during the return trip, and there will be no adverse effects from heat. It disappears.

In addition, by stopping the gas supply to the torch when moving in the Y direction, it is possible to cut small steel plates of different sizes at the same time, since a torch whose gas supply is stopped cannot cut in the Y direction. be able to.

<<Example>> The drawing is a plan view of a gas cutting apparatus for carrying out the method of the present invention, and FIG. 2 is a process diagram showing an example of a cutting operation.

This gas cutting device (1) consists of a cross beam (4) that moves back and forth (in the X direction) on a pair of running rails (3) installed on the left and right sides of a workpiece mounting table (2), A torch support stand (6) that moves left and right (X direction) guided by a pair of upper and lower guide rails (5) arranged at ), cross beam (4) and torch support (6)
) drive devices (8) (9) and cross beam (4)
and a traveling numerical control device (lO) that controls the amount of movement of the torch support stand (6), and a flow path cutoff valve (12) arranged in each gas supply path (11) to each fusing torch (7). It is composed of a gas supply control device (13) that controls opening and closing. This gas supply control device (I3) has a cross beam (
4) is a program that calculates the amount of movement from the origin position in the X direction as distance information and stops the gas supply to the fusing torches (7) other than the fusing torch (7) according to the distance in the X direction. It has been incorporated. In addition, each fusing torch (7
) is equipped with an automatic igniter.

Using the automatic gas cutting device (1) configured as described above,
The case where small strip-shaped steel plates having the same width and different lengths are cut out from a regular-sized steel plate will be described with reference to FIG. 2.

Three fusing torches (7) are fixed at a fixed pitch on the torch support stand (6), and the cross beam (4) is attached to the traveling rail (3).
Move the top and cut simultaneously with three fusing torches (7) (X direction). When the amount of movement of the cross beam (4) reaches a preset value, the travel control device (10) is activated to stop the movement of the cross beam (4) in the X direction, and the torch support ( 6) is guided by the guide rail (5) and moved in the Y direction. At the same time, the amount of movement of the cross beam (4) from the origin position in the X direction is input to the gas supply control device (13) as distance information, and the program in the gas supply control device (13) is activated to The flow path cutoff valve (12) installed in the gas supply path (ti) to the third torch (7b) (?c) is operated to shut off the gas supply path (ti) to the second and third torches (7b) (7c). Stop the flame.

Therefore, when the torch support (6) moves in the Y direction, the
Only the torch (7a) will perform the cutting operation. When the amount of movement of the torch support (6) in the Y direction reaches a predetermined amount, the travel control device (10) is activated to reversely move the torch support (6), and the gas supply control device (
13), the flow path cutoff valve (12) installed in the gas supply path (1l) to the first torch (7a) is operated to shut off, and the torch support base (6) is moved in the Y direction in the absence of flame. Return to the origin position.

When the torch support base (6) returns to its original position in the Y direction, the gas supply control device (I3) is activated to open each flow path cutoff valve (12), and the automatic ignition device ignites the flame. , and the travel control device (10) controls the cross beam (4).
) in the X direction.

Then, when the cumulative amount of movement from the origin position in the
) in the Y direction. At the same time, the gas supply control device (13) operates and the first and third torches (7a) ('
The flow path cutoff valve 02) to 7c is operated in a shut-off manner to perform cutting in the Y direction using only the second torch (7b), and when the amount of movement in the Y direction reaches a predetermined value, the gas supply is stopped. Extinguish the flame and return the torch support to its original position in the Y direction.

By continuing such operations, cross 1:'-
Only the fusing torch (7) that corresponds to the amount of movement of 4 (4) contributes to the cutting work in the Y direction, and the other fusing torches (7) that are moving together are extinguishing the flame, so the length Different types of small steel plates can be cut out at the same time.

In the above embodiment, the flame of the unneeded cutting torch (7) is extinguished when moving in the Y direction, but the flow path cutoff valve (12), which is involved in supplying cutting oxygen, is closed and operated. It's okay.

In addition, depending on the numerical input to the gas supply control device (13), small steel plates of the same length can be cut out in parallel.

<<Effects>> In the present invention, a flow path cutoff valve is arranged in each of the fusing gas supply paths that supply fusing gas to a plurality of fusing torches arranged on a torch support stand, and the flow path cutoff valves are connected to the gas supply control device. It is configured to be able to individually control opening and closing based on the output of the torch, and inputs the amount of movement of the torch support stand or workpiece mounting stand from the origin in the X direction as distance information to the gas supply control device.
Based on this distance information, a program preset in the gas supply control device is operated to maintain at least some of the flow path cutoff valves in a conductive state, and the torch support stand or workpiece mounting stand is moved in the Y direction. The structure is configured so that the cutting oxygen passages to at least all of the fusing torches are shut off by closing the flow path cutoff valve during the return movement in the Y direction, and the torch supporting stand or workpiece mounting The stand is Y
By returning to the origin in the direction, the flow path cutoff valve is opened and activated, and the fusing torch is ignited to restart movement in the X direction, so it is necessary for forward movement in the Y direction. Only the torch is lit, and only that torch will do the cutting. Then, during the return trip in the Y direction, all torches are either extinguished or the cutting oxygen is stopped, so the steel plate is not exposed to the cutting oxygen flame during this return trip, and there is no adverse effect due to heat. .

In addition, by stopping the gas supply to the torch when moving in the Y direction, it is not possible to cut in the Y direction with a torch whose gas supply is stopped, so it is possible to cut small steel plates of different sizes at the same time. I can do it.

[Brief explanation of the drawing]

The drawing is a plan view of a gas cutting apparatus for carrying out the method of the present invention, and FIG. 2 is a process diagram showing an example of a cutting operation. l... automatic gas fusing device, 2... workpiece mounting table,
6...Torch support stand, 7...Fusing torch, io...
Traveling control device, 11... gas supply path for fusing, 12...
・Flow path cutoff valve, i3...Gas supply control device.

Claims (1)

[Claims] 1. Torch support stand (to which multiple fusing torches (7) are fixed)
6) and the workpiece mounting table (2) are configured to be movable relative to each other in the X-Y directions, and one of the torch support stand (6) and the workpiece mounting table (2) is controlled by a travel control device ( When cutting a small strip of steel plate from a fixed-length steel plate using an automatic gas cutting device (1) configured to be able to controllably move in the X-Y direction using )
A flow path cutoff valve (12) is arranged at each of the torch support stand (6), and the flow path cutoff valve (12) is configured to be able to be opened and closed individually based on the output from the gas supply control device (13).
Alternatively, the amount of movement of the workpiece mounting table (2) from the origin in the X direction is input to the gas supply control device (13) as distance information, and based on this distance information, the gas supply control device (13)
3) With the program set in step 3) activated and at least some of the flow path cutoff valves (12) maintained in a conductive state, the torch support stand (6) or the workpiece mounting stand (2) is operated.
is configured to reciprocate in the Y direction, and during the return movement in the Y direction, the flow path cutoff valve (12) is operated to close, thereby blocking at least all the cutting oxygen paths to all the fusing torches (7). Then, when the torch support stand (6) or the workpiece mounting stand (2) returns to the origin in the Y direction, the flow path cutoff valve (12) is activated and the fusing torch (7) is ignited, and the A method for cutting out strips from a fixed-length steel plate configured to restart the movement of