JPH02280963A - Method and device for collecting cut piece in gas cutting method - Google Patents

Abstract

PURPOSE:To automatically collect small cut pieces and slag of automatic gas cutting by dropping wholly the cut pieces and slag dropped from gaps of a surface plate on the floor surface, attracting the cut pieces and slag by a carriage provided with an electromagnet and carrying and assorting these automatically. CONSTITUTION:The carriage 9 is moved to the prescribed position and attracts the cut pieces, etc., by the rise and fall and magnetic attraction of the electromagnet 14 and returns to the standby position on a conveyor 10 and drops the collected cut pieces, etc., on the conveyor 10. By repeating this, the cut pieces, etc., on a carriage traveling passage of the floor surface 5 are collected successively. Since the cut pieces, etc., left after being collected by each working cycle remain a little, the carriage 9 is lastly moved to the position most far from the standby position where collection is started in the first place and this time, the electromagnet 14 is not lowered horizontally and only the far side thereof from the standby position is lowered and in the state with the electromagnet 14 inclined, the carriage 9 is moved to the standby position so as to sweep over the floor surface 5 and collects wholly the cut pieces, etc., left slightly.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to small cut pieces and small cut residues that are products obtained by cutting thick steel plates etc. using an NC gas cutting device or the like. The present invention also relates to a method for automatically collecting and sorting so-called slag, which is made up of metal grains or fine powder made by solidifying molten metal during cutting, and an apparatus used therein.

[Conventional technology]

When cutting thick steel plates automatically using an NC gas cutting device, etc., the material is cut on a grid-like surface plate L consisting of horizontal girders arranged in parallel at regular intervals, as shown in Figure 2. steel plate 2
is placed horizontally, the gas flame 3 of the NC gas cutting device is automatically controlled, and cutting is performed while jetting cooling water.

In the conventional cutting device, a wire mesh 4 is stretched horizontally below a surface plate 1. Among the cut steel plates, large pieces remain on the surface plate 1, while small pieces fall from the gaps in the surface plate 1 onto the wire mesh 4.

The metal molten during cutting falls while remaining in a molten state or while solidifying into particles or powder, and most of it falls through the mesh of the wire mesh 4 and is deposited on the floor surface 5 below as so-called slag.

In order to use the steel plate material as effectively as possible, large products and small products are appropriately combined and cut simultaneously from two steel plates, so some of the cut pieces that fall onto the wire mesh 4 contain small products. The necessary small cut pieces and unnecessary small cut pieces are mixed together.

Conventionally, the cut pieces that have fallen onto the wire mesh 4 are manually picked up by a worker, adsorbed by a magnetic crane, transported to a predetermined position, and sorted into necessary products and unnecessary cut pieces.

[Problems to be Solved by the Invention] In the conventional gas cutting method described above, most of the slag generated when cutting a steel plate passes through the wire mesh 4 and is deposited on the floor 5. A part of it solidifies and adheres to the wire mesh 4, and slag is further deposited on top of it, eventually blocking the mesh.
Dissipation of heat during cutting is hindered, causing inconvenience. Therefore, it is necessary to periodically break up the slag deposited on the wire mesh 4 with an air hammer or the like and let it fall onto the floor 5.

Furthermore, the slag deposited on the floor surface 5 needs to be removed every few months by removing the surface plate 1 using a shovel loader or the like, and during this time the cutting operation is interrupted, reducing the operating rate of the device.

In addition, many accidents occur in which workers pick up cut pieces that have fallen onto the wire mesh 4 with their hands and get their fingers caught and get injured when they are adsorbed by the magnetic crane, which poses a problem in terms of labor safety.

In order to automate the collection of these cut pieces and slag, we use a conveyor surface plate that moves the entire surface plate as a conveyor, and after cutting is completed, the conveyor is operated to collect the cut pieces. A method has been proposed in which a book conveyor is installed and cut pieces and glue are dropped onto the conveyor and collected, but this method requires a long conveyor, requires large-scale equipment, and increases equipment costs. .

Accordingly, an object of the present invention is to provide a method for automatically collecting small pieces and slag in automatic gas cutting, and an inexpensive device for use therein.

[Means for solving problems]

In order to achieve the above object, the inventors of the present invention conducted extensive research and found that without installing a wire mesh below the surface plate, all the cut pieces and slag that fell through the gaps of the surface plate were allowed to fall to the floor, and the electromagnet was removed. The present inventors have discovered that the cut pieces and slag can be automatically collected by adsorbing the cut pieces and slag and automatically transporting and sorting them using a cart equipped with the vehicle, and have completed the present invention.

That is, the present invention is an automatic gas cutting method in which a gas flame is used to cut a steel plate placed on a surface plate made up of a number of supporting members arranged parallel and horizontally at regular intervals. Then, all the slag produced by the solidification of the molten metal is dropped onto the floor below the surface plate, and an electromagnet loaded on a trolley that reciprocates along a rail placed on the floor is lowered and the small The cut pieces and slag are absorbed, the electromagnet is raised and transported to the top of the conveyor, the electric current of the electromagnet is cut off and the small pieces and slag fall onto the conveyor, and this process is repeated to remove the surface plate. The gist of this paper is a method for collecting cut pieces in the gas cutting method, which collects small pieces and slag on the floor below.

Another aspect of the present invention is an automatic gas cutting device comprising a rail laid on the floor below a surface plate on which a steel plate to be cut is placed, and an automatic traveling device rolling on the rail. a truck; an electromagnet loaded on the truck and equipped with a lifting mechanism;
The gist of the present invention is to provide a cut piece collecting device characterized in that a conveyor is provided at one end of the running path of the cart or at the lower part of an intermediate portion thereof in a direction perpendicular to the running path.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of the entire automatic gas cutting device equipped with the recovery device of the present invention. A plurality of gas cutting devices are installed on a bridge-shaped movable frame 7 that moves across rails 6 laid along both sides of a surface plate 1 with a width of 10 m and a length of 60 m, and parallel to the surface plate 1. A plurality of placed steel plates 2 are cut simultaneously and in parallel. On the surface plate 1 having a length of 60 m, four movable frames 7 can perform the cutting operation at the same time.

9 is a cart that moves on the floor 5 below the surface plate 1 in the same direction as the moving direction of the gas cutting device, and IO is a slat conveyor provided in a direction perpendicular to the moving direction of the cart 9.

3 to 5 are a plan view, a front view, and a side view of the truck 9 and the slat conveyor 10. The trolley 9 rolls on rails 12 laid on the floor 5 by wheels 11, and is driven by a motor 13 for running the trolley.

14 is an electromagnet loaded on a cart 9, and two shafts 1
5. Two sets of Cheno foil 1 each fixed to 157
The front and rear parts are suspended so that they can be raised and lowered independently by a chino 17.171 that has one end fixed to 6.16'.

18.18'' are deceleration motors for lifting and lowering, and drive shafts 15.15'' via chinos 19 and 19'.

In FIG. 4, reference numeral 20 denotes an inclined guide plate that guides the cut pieces and slag falling from the top of the surface plate 1 so that they fall into the truck running path on the floor 5.

The slat conveyor 10 is disposed at the end of a plurality of bogie running paths in a pit 21 provided in a direction perpendicular to the bogie running paths,
One end thereof is curved to form a sloped portion 26 for conveying diagonally upward. 22 is a driving motor for the slat conveyor 10, which drives a driving chain wheel 23 via a chain;
The slat conveyor 10 is driven. Slat conveyor 1
The conveyor plate 24 of 0 is provided with a protrusion plate 25 that protrudes from the upper surface, and is tilted! At 26, the removed items on the fine feed plate 24 are prevented from sliding off. It is desirable to attach a cushioning material to the upper surface of the conveyor plate 24 of the slat conveyor IO in order to reduce the noise caused when cut pieces or the like fall.

Below the upper end 27 of the slat conveyor IO, a slit plate 28 having a large number of slits for separating the transported cut pieces and slag is installed at an angle, and directly below the slit plate 28 is a slag collection box 29. A cut piece collection box 30 is placed below the tip of the slit plate 28.

Reference numeral 8 in FIG. 6 denotes a rubber exclusion plate for removing cut pieces and the like that have fallen onto the cart 9 and are loaded thereon. While the trolley 9 reciprocates on the trolley running path during the work of collecting cut pieces, etc., it passes directly under the part of the steel plate that is being cut many times, so the cut pieces, etc. just fall onto the running trolley 9. However, the exclusion plate 8 is suspended at a position where its lower end slightly touches the top surface of the cart 9 passing below, and each time the cart 9 passes under it, the removal plate 8 is suspended. It is designed to scrape off cut pieces etc. loaded on the trolley 9. In addition, obstacle detection bumpers 31 are provided at the front and rear of the truck 9, and a safety device is provided so that if the truck 9 touches something while it is running, it will be detected and the truck 9 will stop immediately.

In the gas cutting equipment equipped with the recovery device of the present invention, the wire mesh 4 is not provided under the surface plate 1, but in the above embodiment, the spacing between the girders of the surface plate 1 is 110 mm, so that the worker working on it For safety reasons, it is desirable to arrange a horizontal bar parallel to the girder in the middle of the gap between the girders of the surface plate 1 to prevent workers from stepping on it.

In the above embodiment, the pit 21 on which the slat conveyor 10 is arranged is provided so as to connect one end of the plurality of bogie running paths, but it may be provided so as to cross the middle part of the plurality of bogie running paths.

[Effect]

When the steel plate is cut by the gas cutting device, the cut products, such as small pieces, small cut pieces, and slag, all fall from the gap of the surface plate 1 and are guided by the inclined guide plate 20 to the center of the bogie running path. It is deposited on the floor surface 5 along the line. In order to collect the cut pieces and slag accumulated on the floor surface 5, a control device (not shown) drives the trolley traveling motor 13 to move the trolley to the floor surface 5 where the collection work is to be performed. At this time, the electromagnet 14 is in the raised position.

Next, the shaft 15.15' and the Cheno wheel 16.16v are rotated by the reduction motor 18.18', and the Cheno wheel 17.17 is rotated.
' is rewound, the electromagnet 14 is lowered in a horizontal state, and the cut pieces and slag are attracted by the magnetic force. Next, electromagnet 14
is raised by about 20 cm, and in that state, the cart 9 is driven to a standby position on the conveyor 10, where the electric current of the electromagnet 14 is cut off, and the cut pieces and the nozzle that have been attracted fall off. The cut pieces and slag are guided by the inclined guide plate 201 in the pitcher 21 and fall onto the conveyor 10. With this one reciprocation of the cart 9, a portion of the floor surface 5 approximately equal to the bottom area of the electromagnet 14 can be cleaned.

Next, the cart 9 is moved to a position adjacent to the part of the floor surface 5 where the cut pieces etc. were collected last time, and the electromagnet 14 moves up and down and the cut pieces etc. are attracted by magnetic attraction as before, and the conveyor 1
The machine returns to the standby position on the conveyor 10 and drops the collected cut pieces and the like onto the conveyor 10.

This is repeated to sequentially collect cut pieces and the like on the truck running path on the floor 5. Since some cut pieces may remain after being collected in each of the above work cycles, the cart 9 is finally moved from the standby position to the position farthest from where collection started, and the electromagnet 14 is lowered horizontally. The cart 9 is moved to the standby position by sweeping the floor 5 by lowering only the side farthest from the standby position, leaving the electromagnet 14 in an inclined state, and removing the cut pieces etc. that are slightly left behind. Collect all.

Normally, it takes about 4 to 5 hours to cut a steel plate with a width x length of 3000 x 9000 mm using one gas cutting machine, so the above recovery work can be completed in that time. .

The movement of the cart 9, the storage of the collection location, the raising and lowering of the electromagnet 14, etc. are all controlled by a computer of a control device (not shown).

The cut pieces and slag that have been collected by the plurality of carts 9 and have fallen onto the slat conveyor 10 are conveyed to the upper end 27 of the conveyor 1O and fall onto the slit plate 28, and while sliding down the top, the slag falls onto the slit plate 28. It passes through the slit and falls into the slag collection box 29. The cut pieces fall from the tip of the slit plate 28 into the cut piece collection box 30 and are stored, and are sorted into products and scraps in another subsequent process.

〔Effect of the invention〕

According to the cut piece recovery method in the gas cutting method of the present invention, it is possible to completely eliminate the work of picking up small cut pieces that have fallen from the gap of the surface plate 1, and to eliminate industrial accidents associated with this work. It can be done.

Since the wire mesh 4 under the surface plate 1 of the conventional gas cutting device is removed, slag does not accumulate there, and the wire mesh 4 is not blocked by the accumulated slag and heat radiation is not hindered.

There is no need to clean the wire mesh 4 with an air hammer or the like in order to remove the slag deposited on the wire mesh 4 under the surface plate 1, and it is not necessary to clean the wire mesh 4 regularly to remove the slag deposited on the floor surface 5. There is no need to stop the process and perform large-scale cleaning work, which improves the operating rate of the gas cutting equipment.

The cut pieces and the like that fall from the surface plate 1 fall directly onto the concrete floor 5 and are attracted and transported by the electromagnet 14, so that noise is small.

In addition, there is no need for large-scale equipment such as installing a conveyor over the entire floor surface 5 for collecting cut pieces under the surface plate 1, and the cut pieces and slag can be collected extremely efficiently with simple equipment. can be sorted.

Since the floor surface 5 below the surface plate 1 can always be kept clean, the flow of cooling water during gas cutting is not obstructed after it falls onto the floor surface 5.

[Brief explanation of drawings]

FIG. 1 is a plan view of the entire automatic gas cutting device equipped with the recovery device of the present invention, FIG. 2 is a side view of a surface plate used in a conventional gas cutting device, and FIG. 3 is a plan view of the automatic gas cutting device equipped with the recovery device of the present invention. FIG. 4 is a plan view of the main part, FIG. 4 is a front view of the same, and FIG. 5 is a side view of the same. 1° surface plate, 2 steel plate, 3 gas flame, 4 wire mesh, 5 floor, 6 rail, 7 moving frame,
8-exclusion plate, 9 trolley, lO conveyor 111 wheels,
12 rail, 13 bogie running motor, 14 electromagnet, 15 axis,
16 Cheno foil, 17 Cheno, 1
8 Reduction motor, 19 Cheno, 20
Inclined guide plate, 21 Pit, 22
Drive motor, 23 Drive chain wheel, 25° protrusion plate, 27 Upper end, 29 Slag collection box, 31 Bumper 24 Transport plate, 26 Inclined part, 28 Slit plate, 30 Cut piece collection box,

Claims (2)

[Claims] (1) In the automatic gas cutting method, in which a gas flame is used to cut a steel plate placed on a surface plate made up of a number of supports placed parallel and horizontally at regular intervals, small pieces and melting occur during cutting. All the slag produced by the solidification of the metal is dropped onto the floor below the surface plate, and an electromagnet loaded on a cart that reciprocates along a rail placed on the floor is lowered to produce the small pieces. The electromagnet is raised and transported to the upper part of the conveyor, the electric current of the electromagnet is cut off, and the small pieces and the slag fall onto the conveyor. By repeating this operation, the area under the surface plate is removed. A cut piece collection method in the gas cutting method that collects small pieces and slag on the floor. (2) In an automatic gas cutting device, there is a rail laid on the floor below the surface plate on which the steel plate to be cut is placed, a trolley equipped with an automatic traveling device that rolls on the rail, and a trolley on the trolley. What is claimed is: 1. A cut piece collecting device comprising: an electromagnet loaded on a truck and equipped with a lifting mechanism; and a conveyor provided at one end of the running path of the cart or at the lower part of an intermediate portion thereof in a direction perpendicular to the running path.