JPH072272B2 - How to cut strips from standard length steel - Google Patents

Description

TECHNICAL FIELD The present invention relates to input of a cutting method in which a strip-shaped small steel plate is cut out from a standard length steel plate using an automatic fusing machine.

<Prior Art> Conventionally, when cutting a large number of strip-shaped small steel plates from a standard steel plate using an automatic fusing machine, the fusing torches are fixed at predetermined intervals on a torch support table that moves relative to the workpiece mounting table, Work piece (steel plate) held on the work table
By relatively moving the fusing torch in one direction, a strip having a predetermined width is once formed, and the strip is cut into a predetermined length to form a small steel plate having a predetermined size. In addition, after moving the torch support base or the workpiece mounting base in the X direction, the torch support base is moved in the Y direction, and again in the X direction, and then Y
There is also proposed a method of forming a cutting line in a key shape by cutting back a strip-shaped small steel plate by returning in the direction.

<Problems to be solved> However, in the case where the strip is once formed and then cut into a predetermined length, there are problems that the number of man-hours for cutting work increases and that it is difficult to form a right angle due to the heat effect of the steel material. It was

Further, in the conventional one in which the torch support table or the work piece mounting table is moved in the two directions of XY, the cutting flame remains ignited during the whole process, so that the heat effect of the steel material is large. Moreover, there is a problem that only small steel plates having the same shape can be cut out.

The present invention has been made paying attention to such a point, and an object thereof is to make it possible to simultaneously cut out strip-shaped small steel plates having a small heat effect and different shapes.

<< Means for Solving the Problems >> In order to achieve the above-mentioned object, the present invention provides a torch support base 6 to which a plurality of fusing torches 7 are fixed and a workpiece mounting base 2 with X.
The automatic gas fusing device 1 is configured to be relatively movable in the −Y direction, and either the torch support base 6 or the workpiece mounting base 2 can be controlled and moved in the XY directions by the traveling control device 10. When cutting a strip-shaped small steel plate from a standard steel plate,
A flow path shut-off valve 12 is arranged in each of the fusing gas supply paths to each fusing torch 7, and these flow path shut-off valves 12 are individually configured to be able to be controlled to open and close based on the output from the gas supply control device 13. A program preset in the gas supply control device 13 based on the distance information, which is obtained by inputting the amount of movement of the support table 6 or the workpiece mounting table 2 from the origin in the X direction as distance information to the gas supply control device 13. Is operated to hold at least a part of the flow path shutoff valve 12 in a conductive state, the torch support base 6 or the workpiece mounting base 2 is reciprocally moved in the Y direction, and the return to the origin in the Y direction is performed. The flow path shut-off valve 12 is closed at the time of operation to shut off the supply passages involved in the supply of cutting oxygen to at least all of the fusing torches 7, and the torch support base 6 or the workpiece mounting base 2 is configured. Returns to the origin in the Y direction. Accordingly, by operating the flow path shut-off valve 12 ignites the blow torch 7 is characterized by being configured so as to restart the movement in the X direction.

<< Operation >> In order to achieve the above object, the present invention operates as follows, for example, as shown in FIGS. 1 and 2.

Either one of the torch support table 6 to which a plurality of fusing torches 7 are fixed and the workpiece mounting table 2 is moved in the X direction under the control of the traveling control device 10, and the fusing gas is supplied to each fusing torch 7. By making the flow path shut-off valves 12 arranged in the paths electrically connected, the standard length steel plates on the workpiece mounting table 2 are simultaneously cut in the X direction by the cutting oxygen flame of each fusing torch 7.

Then, the torch support base 6 or the work piece mounting base 2 becomes X.
When the gas supply control device 13 is moved by a preset amount from the origin in the direction, for example, one fusing torch (hereinafter,
The first torch. ) Other fusing torches other than 7a (hereinafter referred to as second torch / third torch) 7b and 7c are closed by the flow path shutoff valve 12 of the fusing gas supply passage, and the first torch 7a
Only the cutting work is maintained. In this state, the torch support base 6 or the workpiece mounting base 2 moves in the Y direction under the control of the traveling control device 10, so that the cutting operation in the Y direction is performed only by the first torch 7a.

After that, Y of the torch support base 6 or the workpiece mounting base 2
When the amount of movement from the origin in the direction becomes a predetermined amount, the torch support base 6 or the workpiece mounting base 2 reversely moves in the Y direction under the control of the traveling control device 10, and the gas supply control device 13 causes the first to move. The flow path cutoff valve 12 of the fusing gas supply path to the torch 7a is closed.

As the fusing gas supply path to the fusing torch 7, there are a supply path involved in supplying a mixed gas of fuel gas and oxygen (air) and a supply path involved in supplying cutting oxygen.
The flow path shutoff valve 12 that is closed may be at least the flow path shutoff valve 12 that is disposed in the supply path that is involved in the supply of cutting oxygen.

As a result, the supply of cutting oxygen to at least all of the fusing torches 7 is stopped, and in this state, the torch support base 6 or the workpiece mounting base 2 returns to the origin in the Y direction.

Then, the torch support base 6 or the workpiece mounting base 2 is Y
Returning to the origin in the direction, the gas supply control device 13 causes the passage cutoff valves 12 of the fusing gas supply paths to the respective fusing torches 7 to be electrically connected and the respective fusing torches 7 to ignite, and the traveling control device 10 Based on the control of 1, the movement of the torch support base 6 or the workpiece mounting base 2 in the X direction is restarted. As a result, the standard length steel plates are simultaneously cut again in the X direction by each fusing torch 7.

After that, the torch support base 6 or the workpiece mounting base 2 is moved to the X position.
After moving by a preset amount in the direction, for example, the flow path cutoff valve 12 of the fusing gas supply path to the other fusing torches 7a and 7c except the second torch 7b is closed, and in this state the torch support base 6 or the workpiece mounting table 2 moves in the Y direction, so that the cutting operation in the Y direction is performed only by the second torch 7b. Then, when the torch support base 6 or the workpiece mounting base 2 moves in the Y direction by a predetermined amount, the flow path cutoff valves 12 of the fusing gas supply paths to all the fusing torches 7 are closed, and in this state The torch support base 6 or the workpiece mounting base 2 is returned to the origin in the Y direction.

Thereafter, the same operation as above is repeated, and each fusing torch 7
The small steel plates with different lengths are cut out at the same time.

<< 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 drawing showing an example of the cutting work.

The gas cutting device (1) includes a cross beam (4) that moves forward and backward (X direction) on a pair of traveling rails (3) provided on the left and right of the workpiece mounting table (2), and the cross beam (4). 4) A torch support base (6) that moves left and right (Y direction) by being guided by a pair of upper and lower guide rails (5).
A plurality of fusing torches (7) supported on the torch support (6), cross beams (4) and drive devices (8) (9) for the torch support (6), and cross beams (4)
And a traveling numerical control device (10) for controlling the movement amount of the torch support base (6), and a flow path shutoff valve (12) arranged in the gas supply path (11) to each fusing torch (7). And a gas supply control device (13) for controlling opening and closing. In this gas supply control device (13), the moving amount of the cross beam (4) from the origin position in the X direction is calculated as distance information, and the fusing torch (7) other than the fusing torch (7) corresponding to the distance in the X direction is calculated. A program is installed to shut off the gas supply to the. An automatic igniter is attached to each fusing torch (7).

Using the automatic gas cutting device (1) configured in this way,
A case of cutting out strip-shaped small steel plates having the same width and different lengths from a regular-sized steel plate will be described with reference to FIG.

Three fusing torches (7) are fixed to the torch support (6) at a fixed pitch, and the cross beam (4) is fixed to the traveling rail (3).
It moves up and cuts simultaneously with three fusing torches (7) (X direction). When the amount of movement of the cross beam (4) reaches a preset value, the traveling control device (10) is activated to stop the movement of the cross beam (4) in the X direction, and the torch support base ( 6) is guided by the guide rail (5) and moved in the Y direction. At the same time, the movement amount 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,
A program in the gas supply control device (13) operates to shut off the flow passage shutoff valve (12) provided in the gas supply passage (11) to the second and third torches (7b) (7c). Then, the flames of the second and third torches (7b) (7c) are stopped. Therefore, when the torch support base (6) is moved in the Y direction, only the first torch (7a) will perform the cutting work. Then, when the amount of movement of the torch support base (6) in the Y direction reaches a predetermined amount, the travel control device (10) is activated to reversely move the torch support base (6) and the gas supply control device (13). The flow path shutoff valve (1) installed in the gas supply path (11) to the first torch (7a)
Make 2) shut off and return the torch support (6) to the origin position in the Y direction without flame.

Then, when the torch support base (6) returns to the origin position in the Y direction, the gas supply control device (13) operates to open each flow path shutoff valve (12), and the automatic ignition device ignites. , And the cross beam (4) with the travel control device (10)
Move in the direction.

Then, when the cumulative movement amount from the origin position in the X direction reaches a predetermined value, the traveling control device (10) is activated to stop the movement of the cross beam (4) and the torch support base (6).
In the Y direction. At the same time, the gas supply control device (13) operates to shut off the flow path shutoff valve (12) to the first and third torches (7a) (7c), and the second torch (7b).
The cutting is performed in the Y direction only by itself, and when the movement amount in the Y direction reaches a predetermined value, the gas supply is stopped to extinguish the flame, and the torch support is returned to the origin position in the Y direction.

By continuing such an operation, only the fusing torch (7) corresponding to the movement amount of the cross beam (4) contributes to the cutting work in the Y direction, and the other fusing torches (7) moving together. Since the flame is extinguished, small steel plates with different lengths can be cut out at the same time.

In the above embodiment, the flame of the fusing torch (7), which is not required when moving in the Y direction, is extinguished, but the flow path shutoff valve (12) involved in the supply of cutting oxygen is closed. May be.

Note that small steel plates of the same length can be cut in parallel by inputting numerical values to the gas supply control device (13).

<< Effects >> The present invention has the following effects because it is configured and operates as described above.

a) During the forward movement in the Y direction, only the required fusing torch can be cut, and other fusing torches other than the necessary fusing torch do not perform the cutting work in the Y direction.
Each fusing torch can cut small steel plates having different lengths almost simultaneously. Therefore, it is possible to shorten the time for cutting out small steel plates having different lengths.

b) Further, at the time of returning in the Y direction, at least all of the cutting oxygen to the fusing torch is stopped, so during this returning, the standard length steel plate on the workpiece mounting table may be exposed to the cutting oxygen flame. The cutting surface is prevented from being thermally deformed or the material is changed due to the adverse effect of the cutting oxygen flame at the time of returning, and the cutting surface having a good finish can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a gas cutting apparatus for carrying out the method of the present invention,
FIG. 2 is a process drawing showing an example of the cutting work. 1 ... Automatic gas fusing device, 2 ... Workpiece mounting table, 6 ...
… Torch support, 7 …… Fusing torch, 10 …… Running control device, 11 …… Fusing gas supply path, 12 …… Flow path shutoff valve, 13…
... Gas supply control device.

Claims (1)

[Claims] 1. A torch support base (6) to which a plurality of fusing torches (7) are fixed and a workpiece mounting base (2) are configured to be relatively movable in the XY directions, and the torch support base (6) When cutting a strip-shaped small steel plate from a fixed-size steel plate by an automatic gas fusing device (1) configured so that either one of the workpiece mounting table (2) can be controlled and moved in the XY directions by the travel control device (10) , A flow path shutoff valve (12) is arranged in each fusing gas supply path to each fusing torch (7), and these flow path shutoff valves (12) are individually based on the output from the gas supply control device (13). The opening and closing control is possible, and the amount of movement of the torch support base (6) or the workpiece mounting base (2) from the origin in the X direction is input to the gas supply control device (13) as distance information. , The gas supply controller (13) is set in advance based on this distance information. A program is operated to reciprocate the torch support base (6) or the work piece mounting base (2) in the Y direction while keeping at least a part of the flow path shutoff valve (12) in a conductive state. When returning to the origin in this Y direction, the flow path shutoff valve (12)
Is configured to be closed to shut off the supply path involved in the supply of cutting oxygen to at least all of the fusing torches (7), and the torch support base (6) or the work piece mounting base (2). ) Returns to the origin in the Y direction, the flow path shutoff valve (12) is actuated to ignite the fusing torch (7) and restart the movement in the X direction. How to cut out strips.