JPH0335486Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is an automatic gas cutting device that performs profile cutting by rolling a magnet roller arranged concentrically with a gas blowpipe along the circumferential surface of the profile shape. In particular, the present invention relates to a profile-type automatic gas cutting device that is capable of automatically stopping and restarting cutting.

``Prior art and its problems'' Profile-type automatic gas cutting equipment is already well known;
For example, as disclosed in Japanese Patent Publication No. 36-2651 and Utility Model Application No. 48-42110, etc., in this type of device, a magnet roller arranged concentrically with the gas blowpipe is placed at a position away from the peripheral surface of the profiling shape. After placement, piercing is started by injecting preheating mixed gas from the cutting blowpipe nozzle, and piercing is completed before the magnet roller reaches the circumferential surface of the profiling shape. As the roller rotates, known tracing cutting is performed.

Generally, the means for making the magnet roller enter the circumferential surface of the profiling shape while performing piercing is to place the magnet roller on the side surface of the tip of a guide plate that is arranged to intersect the circumferential surface of the profiling shape. There is a method in which the roller is rolled along the side surface of the guide plate and is made to enter the circumferential surface of the profiling shape, but the shape of the circumferential surface of the profiling shape is In the case of a closed curve that returns to the position or a polygonal shape, when the magnet roller goes around once and returns to the original position,
There is a problem in that it is impossible to cut a closed curved line because the guide plate gets in the way.

For this reason, in conventional devices, after the magnet roller reaches the profiling surface, the guide plate is removed or
In addition, a completely manual method is adopted in which the magnet roller is incident on the circumferential surface of the profiling shape.
Such a method not only has poor work efficiency, but also imposes a heavy burden on the operator and poses safety problems.

In addition, in the cutting method described above, after the magnetic roller has made one revolution, it is necessary to have a means for manually separating the roller from the circumferential surface of the profiling shape. However, there are also problems with worker load, safety, and cutting quality.

SUMMARY OF THE INVENTION In view of the shortcomings of the prior art, it is an object of the present invention to provide an automatic shape-copying gas cutting device that can automatically perform everything from the start of cutting to the stopping and restarting of cutting.

The object of the present invention is to provide an automatic gas cutting device that can accurately and reliably perform profile cutting in a predetermined shape.

``Means for Solving the Problems'' In order to achieve this technical problem, the present invention aims to install a cutting blowpipe at the tip of a rocking body that is configured to be able to swing in two dimensions around a base support. In an automatic gas cutting device, a magnet roller is disposed concentrically with the magnet roller, and the magnet roller rotates around the profile-shaped peripheral surface of a profile-shaped member to perform profile cutting in a predetermined shape. A copying pendulum rotatably supported by a copying member so as to intersect a circuit at a predetermined angle, and having only its tip formed of a non-magnetic material, a regulating means for regulating the rotation angle of the copying pendulum, and a copying pendulum. An automatic gas cutting device is proposed which includes a pair of switch means which operate at the angle regulating position of the pendulum, and a timer means which stops the rotation of the magnet roller after a predetermined period of time has elapsed after the operation of the switch means.

The base support is generally vertically erected, but may be positioned horizontally.

The rocking body is configured to be rockable in a two-dimensional direction by the joint action of a plurality of arm rows rotatably supported by the pillar, but is not necessarily limited to this, for example, in a two-dimensional direction. It may also be made of a member that has flexibility only in this direction.

The profiled peripheral surface of the profiled member includes both the inner peripheral surface and the outer peripheral surface, and may have any shape as long as it allows the magnet roller to rotate and return to its original position.

The regulating means for regulating the rotation angle of the copying pendulum may include, for example, a pair of pins, a mechanical regulation means such as a regulation hole regulating the rotation angle of the copying pendulum via a pin, or an electromagnet or other electrical regulation means. included.

The switching means may include a limit switch operated by direct contact with the tracing pendulum or indirect contact via a pin, or a reed switch or other non-contact switch.

The peripheral surface of the tracing pendulum and the tracing shape are generally made of a magnetic material so that the magnet roller can roll while being attracted to it. It is possible to idle the magnet roller at the boundary between the magnetic material and the non-magnetic material and wait until the roller stops rotating, thereby absorbing timer errors and other error factors.

"Operation" According to this technical means, for example, as shown in FIG. 1A, first, the magnet roller 10 is brought into contact with the side surface of the tip of the copying pendulum 13 which is held at one side rotational position by the regulating means 17-18. When piercing with the cutting blowpipe is started in this state, and the magnet roller 10 is rotated in the direction of the arrow at the same time or before or after, the magnetic roller 10 rolls along the side surface of the copying pendulum 13 and after the piercing is completed, the magnetic roller 10 is rotated on the profile shaped peripheral surface 11a. Thereafter, a known profiling cut is performed along the profiling-shaped circumferential surface 11a.

When the magnet roller 10 contacts the opposite side surface of the copying pendulum 13 while rotating around the copying shape peripheral surface 11a, the magnet roller 10 moves the copying pendulum 13 against the copying pendulum 13 along the copying shape peripheral surface 11a. The side regulating means 17'-18' are rotated until they reach the regulating position.

The copying pendulum 13 is the regulating means 17-1.
When the magnet roller 10 is regulated and held at a predetermined position by 8', the magnet roller 10 moves away from the profiling shape peripheral surface 11a along the side surface of the copying pendulum 13, moves toward the tip of the copying pendulum 13, and is moved to a predetermined position by the switch means 15, 16. After a period of time has elapsed, the rotation of the magnet roller 10 is stopped at the position of the side surface of the tip of the copying pendulum 13.

In addition, in the present invention, the tip 3 of the copying pendulum 13
Since a is made of a non-magnetic material, the magnet roller 10 can be idled at the boundary position, and the magnet roller 10 will not accidentally move to the opposite side of the copying pendulum 13.

At the time of restart, as shown in FIG. 1B, since the rotation direction of the magnet roller 10 is reversed (reverse rotation) by the switch means 15 and 16,
The magnet roller 10 rotates in the opposite direction and repeats the same operation as described above.

Embodiments Hereinafter, preferred embodiments of the present invention will be described in detail by way of example with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described in this example are as follows, unless otherwise specified.
This is not intended to limit the scope of this invention, but is merely an illustrative example.

1A to 4 show a profile-type automatic gas cutting device according to an embodiment of the present invention.

In FIG. 2, 21 is a vertical support that stands upright on a base 22 whose levelness can be adjusted;
A first swing arm 23 is attached to the first swing arm 23 so as to be pivotable in the horizontal direction, and a fixed arm 25 extending in the horizontal direction is attached above the first swing arm 23. These arms 23 and 25 are configured to be movable up and down in conjunction with a rack 26 carved in the axial direction.

Now, a second swing arm 24 is pivotally attached to the tip end side of the first swing arm 23, and the swing arm 24 is also configured to be able to pivot in the horizontal direction like the first swing arm 23. As a result, the tip of the second swinging arm 24 is configured to be swingable in two-dimensional directions about the vertical support 21.

The tip side of the second swinging arm 24 is branched into two vertically, and a cutting blowpipe 7 is attached to the lower branch arm 24b.
Further, a magnet roller 10 connected to an electric motor 28 is disposed on the upper branch arm 24a so as to be concentric with the blowpipe mouthpiece 27a.

On the other hand, a profiling member A is attached to the tip of the fixed arm 25 via a position adjustment member 29, and the magnet roller 10 is disposed approximately at the center of the profiling hole 11a of the profiling plate member A. Configure it so that

Figures 1A and 1B are plan views showing the configuration of a copying member A used in such a device, in which a copying plate 11 made of a steel plate or other magnetic material has a profiling hole 11a of a desired shape approximately in the center. A mounting plate 12 is fixed to the lower surface of the position adjustment member 29 and fixes the copying plate 11 in a predetermined position.A copying pendulum 13 is attached to the front end of the lower surface of the mounting plate 12, and a support shaft 14 of the copying pendulum 13 is attached to the front end of the lower surface of the mounting plate 12. A pair of limit switches 1 are located on the rear top surface of the unit.
5 and 16 are disposed facing each other, and an oblong regulation hole 17 for regulating the rotation range of the copying pendulum 13 is bored in a region sandwiched between the limit switches 15 and 16.

The copying pendulum 13 is made of a magnetic material, has a supporting shaft 14 on its wide base side, and is configured to be rotatable in parallel with the mounting plate 12 and the copying plate 11. The profiling pendulum 13 extends at its tip end to approximately the center of the profiling hole 11a, and a tip 13a made of brass or other non-magnetic material is fixed to the distal end thereof.

On the other hand, a vertical pin 18 is set upright at a position corresponding to the regulation hole 17 on the base end side of the copying pendulum 13, and the vertical pin 18 is passed through the regulation hole 17 so that the switch levers 15a and 16a of the limit switches 15 and 16 can be pressed. to form.

The limit switches 15 and 16 are arranged opposite to each other so that the switch levers 15a and 16a are located slightly inside the end of the regulation hole 17, and when the switch levers 15a and 16a are pressed, the magnet roller 1
At the same time, a timer (not shown) is activated to stop the rotation of the magnet roller 10.
The rotation direction of the motor is configured so that the direction of rotation is reversed.

Next, the operation sequence according to this embodiment will be explained.

Start of copying cutting In Fig. 1A, first, the copying pendulum 13 is rotatably held on one end of the regulating hole 17 by the vertical pin 18.
When the operating switch (not shown) is turned on with the magnet roller 10 (position 10-1) in contact with the side surface of the tip, the preheating mixed gas is injected from the cutting blowpipe mouthpiece 27a to perform piercing. At the same time, the magnet roller 10 rotates due to the start of the electric motor 28, and the cutting blowpipe 27, which is concentrically connected to the magnet roller 10 via the second swing arm 24, is moved in the circumferential direction of the hole 11a. move it to

Piercing is completed until the magnet roller 10 (position 10-2) reaches the circumferential surface of the profiling hole 11a, and thereafter, known profiling cutting is performed along the circumferential surface of the profiling hole 11a.

Stopping cutting operation When the magnet roller 10 rolls around the circumferential surface of the profiling hole 11a and comes into contact with the opposite side surface of the profiling pendulum 13 (position 10-3), the magnet roller 10 rotates around the profiling hole 11a. The copying pendulum 13 is rotated while further rolling along the circumferential surface until the vertical pin 18' of the copying pendulum 13 comes into contact with the opposite end of the regulating hole 17.

As a result, as shown in FIG. 1B, the magnet roller 10 (position 10-4) makes one complete rotation around the circumferential surface of the profiling hole 11a, so that the cutting blowpipe 7
This completes the copy cutting.

When the copying pendulum 13 is rotated and held at the end position on the opposite side of the regulating hole 17 by the vertical pin 18', the magnetic roller 10 is separated from the circumferential surface of the copying hole 11a, and the tip of the copying pendulum 13 is moved along the side surface of the copying pendulum 13. Move to the side. (Position 10-5) Now, since the tip 13a of the copying pendulum 13 is made of a non-magnetic material, the magnet roller 10 is connected to the main body side of the copying pendulum 13 made of a magnetic material and the tip 13a. It stops moving while idling at the border. (Position 10-5) On the other hand, when the copying pendulum 13 is in contact with the end on the regulating hole 17 side, the vertical pin 18' presses one limit switch 15 to activate the timer, and after a predetermined time elapses, the copying pendulum 13 The rotation of the magnet roller 10 which is idling at the boundary between the main body side of the magnet roller 13 and the tip 13a is stopped.

Note that the cutting blowpipe 7 is connected to a magnet roller 10.
At the same time as the rotation of the cutting flame stops, or when the magnet roller 10 separates from the circumferential surface of the tracing hole 11a, a solenoid valve (not shown) may be operated to stop the ejection of the cutting flame.

Restart By operating the limit switch 15, the rotation direction of the magnet roller 10 (position 10-5) at the time of restart is prepared to rotate in the opposite direction, and in this state, a cutting restart signal is input. and,
Similarly to the above, the preheating mixed gas is injected from the cutting blowpipe mouth 27a to start piercing, and the magnet roller 10 rotates in the opposite direction and moves in the direction of the circumferential surface of the profiling hole 11a. After reaching (position 10-4), rotate in the opposite direction to the above (in the order of 10-3, 10-2, 10-1), rotate the copying pendulum 13, actuate the limit switch 16, and Repeat the same action.

Therefore, according to this embodiment, all processes from starting copying cutting, stopping copying cutting, and restarting can be performed automatically.

FIG. 4 shows another embodiment in which the copying pendulum 33 is arranged on the same plane as the limit switches 15 and 16, and instead of the regulation hole 17, regulation pins 37 and 38 are provided protruding from both sides of the copying pendulum 33 in the rotation direction. In addition to regulating the rotation angle of the copying pendulum 37, the copying pendulum 3
3 is regulated by the regulating pins 37, 38, the switch levers 15a, 16 of the limit switches 15, 16 that the proximal free end of the copying pendulum 33 faces
a is configured to be pressable.

In this embodiment as well, the same operation as in the first embodiment can be performed.

``Effects of the invention'' As described above, according to the invention, everything from the start of cutting to the stopping and restarting of cutting can be performed automatically with a simple configuration, and as a result, the burden on the operator is reduced, safety is improved, Various advantages such as improved workability are derived.

Further, according to the present invention, it is possible to accurately and reliably perform profile cutting in a predetermined shape, leading to improved cutting quality. It has various effects such as

[Brief explanation of drawings]

1A to 4 show an automatic gas cutting device according to an embodiment of the present invention, FIG. 2 is an overall perspective view, and FIGS. 1A and 1B are principal part plan views showing the operating order of the magnet roller. It is. FIG. 3 is a front sectional view of FIG. 1A. FIG. 4 is a plan view of main parts showing another embodiment. 10... Magnet roller, 13... Copying pendulum, 17, 18, 27, 28... Regulating means, 11
a... Copying peripheral surface, 21... Base support, 23, 2
4... Rocking body, 27... Cutting blowpipe.

Claims (1)

[Scope of utility model registration request] A magnet roller is arranged concentrically with the mouth of the cutting blowpipe at the tip of the rocking body, which is configured to be able to swing in two dimensions around the base support, and the magnet roller rotates around the profiled peripheral surface of the profiled member. In an automatic gas cutting device that performs profiling cutting in a predetermined shape while rotating, the distal end side thereof is rotatably supported on the profiling member so as to intersect the circumferential path of the magnet roller at a predetermined angle, and only the distal end portion thereof a copying pendulum formed of a non-magnetic material, a regulating means for regulating the rotation angle of the copying pendulum, a pair of switch means that operates at an angle regulating position of the copying pendulum, and a predetermined period of time after the switch means is operated. An automatic gas cutting device comprising timer means for stopping rotation of a magnet roller.