JP2019136714A - Cutting system for deformed steel piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting system capable of automatically cutting a deformed steel piece. SOLUTION: A cutting crater 4 that can move in a direction to cut deformed steel pieces S1 to 5 and also can move in a vertical direction, and a steel piece thickness measurement capable of continuously measuring the thickness of the deformed steel pieces. A means 7 and a control means for controlling the operation of the cutting crater 4 are provided. The control means can be used with the upper surface of the deformed steel piece based on the thickness data of the deformed steel piece continuously measured by the steel piece thickness measuring means 7 when cutting the deformed steel piece while moving the cutting crater 4. The vertical position of the cutting crater 4 is continuously controlled so that the distance between the cutting crater 4 and the cutting crater 4 is within a predetermined range, and the relationship between the thickness of the deformed steel piece and the moving speed of the cutting crater is determined in advance. The moving speed of the cutting crater is continuously controlled. [Selection diagram] Fig. 1

Description

The present invention relates to a cutting system for a deformed steel slab that cuts a deformed steel slab while moving a cutting crater.
In addition, the “deformed steel slab” refers to a solid steel slab whose thickness in the cutting direction is not constant.

  For example, Patent Literature 1 discloses a gas cutting device that cuts an object to be cut while moving a cutting torch (cutting crater). Further, in this Patent Document 1, a torch height sensor ring is provided around the cutting crater to always measure the distance between the cutting crater and the material to be cut, and in conjunction with the cutting torch lifting device, the cutting crater and the material to be cut are connected. It is also disclosed to keep the distance constant.

  However, the object to be cut by the gas cutting device of Patent Document 1 is a flat steel piece (standard steel piece) such as a steel plate, and the gas cutting device of Patent Document 1 automatically cuts a deformed steel piece. It is difficult. In other words, since the thickness of the deformed steel slab is not constant in the cutting direction, the energy required for cutting differs in the cutting direction. Therefore, simply keeping the distance between the cutting crater and the material to be cut (deformed steel slab) constant It is difficult to automatically cut a deformed steel piece.

JP-A-9-150263

  The problem to be solved by the present invention is to provide a cutting system capable of automatically cutting a deformed steel slab.

According to one aspect of the present invention, there is provided a cutting system for a deformed steel slab that cuts a deformed steel slab while moving a cutting crater. In this cutting system, the cutting crater is movable in the direction of cutting the shaped steel slab and is also movable in the vertical direction. The cutting system further includes a billet thickness measuring means capable of continuously measuring the thickness of the deformed billet and a control means for controlling the operation of the cutting crater. And this control means is based on the thickness data of the deformed steel slab continuously measured by the steel slab thickness measuring means when cutting the deformed steel slab while moving the cutting crater. The vertical position of the cutting crater is continuously controlled so that the distance to the cutting crater is within a predetermined range, and the cutting is performed according to the predetermined thickness of the profile steel slab and the moving speed of the cutting crater. Continuously controls the movement speed of the crater.
Thus, the cutting system of the present invention continuously controls the moving speed of the cutting crater in addition to the distance between the upper surface of the shaped slab and the cutting crater based on the thickness data of the shaped slab. Thus, it is possible to automatically cut the deformed steel pieces having different energy required for cutting in the cutting direction.

In the cutting system of the present invention, the control means is predetermined based on the data of the thickness of the deformed billet continuously measured by the billet thickness measuring means when cutting the deformed billet while moving the cutting crater. The amount of fuel supplied to the cutting crater can also be controlled continuously according to the relationship between the thickness of the shaped steel slab and the amount of fuel supplied to the cutting crater.
Thereby, the fuel supply amount to the cutting crater at the time of cutting can be optimized.

The cutting system of the present invention can further include a steel piece presence / absence detecting means for detecting the presence / absence of a deformed steel piece. In this case, the control means stops the cutting crater at the preheating position where preheating of the deformed steel piece is performed when the steel piece presence / absence detecting means detects the deformed steel piece, and the steel piece thickness measuring means measured at the preheating position. Based on the data of the thickness of the deformed steel slab, the vertical position of the cutting crater is set so that the distance between the upper surface of the deformed steel slab and the cutting crater is within a predetermined range, and the predetermined deformed steel The preheating time of the deformed steel piece can be set according to the relationship between the thickness of the piece and the preheating time.
Thereby, preheating before cutting of a deformed steel piece can be appropriately performed according to the thickness of the deformed steel piece.

In addition, the control means, based on the data of the thickness of the deformed billet measured by the billet thickness measuring means at the preheating position, according to the relationship between the predetermined thickness of the deformed billet and the amount of fuel supplied to the cutting crater. The amount of fuel supplied to the cutting crater can also be set.
Thereby, the amount of fuel supplied to the cutting crater during preheating can be optimized.

The cutting system of the present invention can further include preheating detection means for detecting a preheating state at a preheating position of the profile steel slab. In this case, the control means can start cutting of the deformed steel slab by moving the cutting crater when the preheating state of the preheating position detected by the preheating detection means reaches a predetermined preheating state.
Thereby, preheating of a deformed steel piece can be implemented more appropriately.

In the cutting system of the present invention, the control means can set the fuel supply amount to the cutting crater to a predetermined minimum amount when the steel piece presence / absence detecting means does not detect the deformed steel piece.
Thereby, the amount of fuel supplied to the cutting crater when preheating or cutting is not performed can be minimized, and fuel consumption can be reduced.

Further, the control means can stop the cutting crater and stop the supply of fuel to the cutting crater if the steel piece presence / absence detecting means does not detect a deformed steel slab for a predetermined distance or more.
Thereby, when the deformed steel piece which is a to-be-cut object runs out, cutting work can be ended automatically.

  According to the present invention, a deformed steel piece can be automatically cut.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows notionally the cutting system which is one Embodiment of this invention, (a) is a top view, (b) is a front view. The perspective view which shows specific embodiment (example of a structure) of the cutting | disconnection system of FIG. FIG. 3 is a right side view of the cutting system of FIG. 2. FIG. 3 is a partially enlarged view of a right side surface of the cutting system of FIG. 2. FIG. 3 is a front view of the cutting system of FIG. 2. The conceptual diagram which shows the structural example of the cutting crater in the cutting | disconnection system of FIG. The operation | movement flow of the cutting | disconnection system of FIG.

FIG. 1 conceptually shows a cutting system according to an embodiment of the present invention.
This cutting system is mounted on the carriage 1. The carriage 1 is provided with a first arm 2 and a second arm 3, a cutting crater 4 and a preheating detection means 5 are attached to the first arm 2, and a steel slab is attached to the second arm 3. Presence / absence detecting means 6 and steel piece thickness measuring means 7 are attached.
The carriage 1 is movable along the rail R, and the moving direction along the rail R is a direction for cutting the deformed steel pieces S1 to S5. The first arm 2 to which the cutting crater 4 is attached is attached to the carriage 1 so that it can be raised and lowered. That is, the cutting crater 4 is movable in the cutting direction for cutting the deformed steel pieces S1 to S5 and is also movable in the vertical direction.
Although not shown in FIG. 1, the cart 1 is also equipped with a control means for controlling the operation of the cutting crater 4.

Here, the preheating detection means 5 detects the preheating state of the preheating position of the profile steel slab. This preheating state includes (a) the temperature at the preheating position, (b) the area ratio of a predetermined color (typically the color of the melted deformed billet) at the preheating position, (c) these (a) and (b ) And the like. For example, an infrared thermometer, a radiation thermometer, or a thermography can be used to detect the preheating state in (a), and color image recognition such as a CCD camera can be used to detect the preheating state in (b). Means can be used.
The steel piece presence / absence detecting means 6 detects the presence or absence of a deformed steel piece, and a general fiber sensor can be used. However, a sensor other than a fiber sensor can be used as long as it can detect the presence or absence of a deformed steel piece.
The steel piece thickness measuring means 7 continuously measures the thickness of the deformed steel piece, and for example, a height detection sensor such as a laser sensor or an ultrasonic sensor can be used. That is, if the height detection sensor detects the height level of the upper surface of the deformed billet, the difference between the deformed billet and the known floor surface level (FL) is obtained. Thickness can be measured continuously. Of course, any sensor other than the height detection sensor can be used as long as the thickness of the deformed steel slab can be continuously measured.

  FIG. 2 shows a specific embodiment (configuration example) of the cutting system of FIG. 3 is a right side view thereof, FIG. 4 is a partially enlarged view of the right side surface thereof, and FIG. 5 is a front view thereof. In FIGS. 3 to 5, in order to clearly show the configuration of the cutting system of FIG. 2, a part of the configuration of the cutting system of FIG. 2 is omitted or seen through. Hereinafter, with reference to these drawings, the configuration of this cutting system, in particular, a mechanism for controlling the moving speed of the cutting crater 4 (hereinafter referred to as “movement control mechanism”) and a mechanism for controlling the vertical position of the cutting crater 4 will be described. (Hereinafter referred to as “vertical position control mechanism”) will be described.

First, the movement control mechanism will be described. Since the cutting crater 4 moves together with the carriage 1 along the rail R in the cutting direction of the deformed steel pieces, the movement speed of the cutting crater 4 is controlled by controlling the movement speed of the carriage 1. Can be controlled. As shown in FIG. 4, the carriage 1 is moved by driving the first servo motor 8. Specifically, a pinion gear 9 is provided on the drive shaft 8a of the first servomotor 8, and a rack 10 that meshes with the pinion gear 9 is provided on the rail R side. Thus, by controlling the rotational speed of the drive shaft 8a (pinion gear 9) of the first servomotor 8, the moving speed of the carriage 1 and hence the moving speed of the cutting crater 4 can be controlled.
In FIG. 4, reference numeral 11 denotes a wheel traveling on the rail R, reference numeral 12 denotes a guide rail, reference numeral 13 a denotes a cam follower for keeping the distance between the pinion gear 9 and the rack 10, and reference numeral 13 b prevents the cart 1 from falling. It is a cam follower to do.

  Next, the vertical position control mechanism will be described. Since the cutting crater 4 is attached to the first arm 2 installed on the carriage 1, the vertical position of the cutting crater 4 is the position of the first arm 2 on the carriage. It can be controlled by raising and lowering 1. As shown in FIGS. 2, 3, and 5, the first arm 2 is supported by the base plate 14, and the base plate 14 moves up and down along the guide 15. Specifically, the first sprocket 17 is attached to the drive shaft 16 a of the second servomotor 16, and the second sprocket 19 is attached to the fixed plate 18 fixed to the carriage 1. A chain 20 is hung on the two sprockets 19. The base plate 14 is connected to the chain 20 via a bracket 21. Accordingly, when the drive shaft 16a of the second servomotor 16 is rotated, the chain 20 rotates, and the base plate 14 moves up and down in conjunction with the rotation of the chain 20. Specifically, when the chain 20 rotates clockwise in FIG. 3, the base plate 14 descends, and when the chain 20 rotates counterclockwise in FIG. 3, the base plate 14 rises. That is, by controlling the rotation direction and the rotation amount of the drive shaft 16a of the second servomotor 16, it is possible to control the elevation of the base plate 14, thereby controlling the vertical position of the cutting crater 4. Can do.

FIG. 6 conceptually shows a configuration example of the cutting crater 4. The cutting crater 4 has one combustible gas supply line and two oxygen supply lines as fuel supply lines, and valves V1 to V3 and flow controllers F1 to F3 are installed in the supply lines, respectively.
The opening and closing operation of the valves V1 to V3, the setting and control of the fuel supply amount by the flow controllers F1 to F3, and further the first servo motor 8 and the second servo motor 16 in the movement control mechanism and the vertical position control mechanism described above. Including the operation of the cutting system of this embodiment is controlled by the control means. Hereinafter, the operation of the cutting system of this embodiment under the control of this control means will be described.

FIG. 7 shows an operation flow of the cutting system of this embodiment.
The control means ignites the cutting crater 4 when starting the operation of the cutting system. Specifically, when the cutting crater 4 is ignited, the valves V1 and V2 are opened and ignited by the ignition nozzle.

After the cutting crater 4 is ignited, when the steel piece presence / absence detecting means 6 detects a deformed steel piece, the control means controls the first servo motor 8 so that the cutting crater 4 is placed at a preheating position for preheating the deformed steel piece. Stop. This preheating position is, for example, the tip corner of the deformed steel slab as indicated by a circle in FIG. Thereafter, the control means, based on the data of the thickness of the deformed steel piece (the upper surface height level of the deformed steel piece) measured by the billet thickness measuring means at this preheating position, the upper surface of the deformed steel piece, the cutting crater 4 and The vertical position (height) of the cutting crater 4 is set so that the distance between the two is within a predetermined range (for example, 50 ± 10 mm), and in accordance with the predetermined thickness of the shaped steel slab and the preheating time A preheating time for the shaped steel slab is set, and a fuel supply amount to the cutting crater 4 is set according to a predetermined relationship between the thickness of the shaped steel slab and a fuel supply amount to the cutting crater 4.
The vertical position (height) of the cutting crater 4 is set by the vertical position control mechanism described above.
In setting the preheating time, the relationship between the thickness of the profile steel slab and the preheating time is determined in advance, and this is stored in the control means. The relationship between the thickness of the deformed steel slab and the preheating time is conceptually a relationship in which the preheating time is increased as the thickness of the deformed steel slab increases. Moreover, this preheating time is the stop time which stops the cutting crater 4 in a preheating position.
Similarly, in setting the fuel supply amount to the cutting crater 4, the relationship between the thickness of the profile steel slab and the fuel supply amount to the cutting crater is determined in advance, and this is stored in the control means. The relationship between the thickness of the shaped steel slab and the amount of fuel supplied to the cutting crater is conceptually a relationship in which the amount of fuel supplied to the cutting crater increases as the thickness of the shaped steel slab increases.

The state of the cutting crater 4 at the time of preheating is a state in which the valve V1 and the valve V2 are open and the valve V3 is closed in FIG. 6 (hereinafter referred to as “preheating state”). In this preheating state, the control means stops the cutting crater 4 at the preheating position and preheats the shaped steel slab by preheating time. At this time, the control means sets the fuel supply amount to the cutting crater 4 as described above. Specifically, the control means sets the fuel supply amount to the cutting crater 4 via the flow controllers F1 and F2.
During this preheating, the preheating detecting means 5 detects the preheating state at the preheating position. The control means moves the cutting crater 4 to start cutting the deformed steel slab when the preheating state at the preheating position detected by the preheating detection means has reached the predetermined preheating state after a predetermined preheating time has elapsed. . On the other hand, if the temperature at the preheating position has not reached the predetermined preheating state, the preheating time is extended until the predetermined heating state is reached.

  After the preheating is completed, the control means moves the cutting crater 4 in the cutting direction of the deformed steel slab to cut the deformed steel slab. The state of the cutting crater 4 at the time of cutting is a state where all the valves V1 to V3 are open in FIG. 6 (hereinafter referred to as “cutting state”). That is, the control means moves the cutting crater 4 in the cutting direction of the deformed steel slab in this cutting state to cut the deformed steel slab.

During this cutting, the control means determines the profile based on the data of the thickness of the deformed billet (upper surface height level of the deformed billet) continuously (always in real time) measured by the billet thickness measuring means 7. While controlling the vertical position (height) of the cutting crater continuously (always in real time) so that the distance between the upper surface of the steel piece and the cutting crater is within a predetermined range (for example, 50 ± 10 mm), The moving speed of the cutting crater is controlled continuously (always in real time) according to the relationship between the thickness of the deformed steel slab and the moving speed of the cutting crater. The amount of fuel supplied to the cutting crater is continuously controlled (always in real time) according to the relationship with the amount of fuel supplied.
The vertical position (height) of the cutting crater 4 is set by the vertical position control mechanism described above.
The movement speed of the cutting crater 4 is controlled by the above-described movement control mechanism. Further, the control of the moving speed is such that the relationship between the thickness of the profile steel slab and the moving speed of the cutting crater is determined in advance, and this is stored in the control means. The relationship between the thickness of the deformed steel slab and the moving speed of the cutting crater is conceptually a relationship in which the moving speed of the cutting crater is decreased as the thickness of the deformed steel slab increases.
Similarly, in the control of the fuel supply amount to the cutting crater 4, the relationship between the thickness of the deformed steel slab and the fuel supply amount to the cutting crater is determined in advance, and this is stored in the control means. The relationship between the thickness of the shaped steel slab and the amount of fuel supplied to the cutting crater is conceptually a relationship in which the amount of fuel supplied to the cutting crater increases as the thickness of the shaped steel slab increases. Specifically, the control means controls the amount of fuel supplied to the cutting crater 4 via the flow controllers F1 to F3.

When the cutting of the deformed steel slab is completed, the steel slab presence / absence detecting means 6 does not detect the deformed steel slab. When the slab presence / absence detecting means 6 no longer detects the deformed steel slab, the control means closes the valve V3 in FIG. 6 and shifts the cutting crater 4 from the cut state to the preheated state, and changes the fuel supply amount to the cutting crater 4 Set to a predetermined minimum amount. Although the cutting crater 4 continues to move in this preheated state, the control means stops the movement of the cutting crater 4 if the slab presence / absence detecting means 6 does not detect a deformed steel slab for a predetermined distance or more (for example, 50 mm or more). At the same time, all the valves V1 to V3 are closed in FIG. 6 to stop the supply of fuel to the cutting crater 4 and extinguish the fire. On the other hand, when the steel piece presence / absence detecting means 6 newly detects a deformed steel piece within a predetermined distance (for example, less than 50 mm), the control means preheats and cuts the deformed steel piece as described above.
In FIG. 7, the distance at which the steel piece presence / absence detecting means 6 does not detect the deformed steel piece is indicated as “blank distance”. This blank distance can be obtained from the steel piece presence / absence detection data from the steel piece presence / absence detection means 6 and the encoder value of the second servo motor 16 in the above-described moving speed control mechanism.

As described above, in this embodiment, the steel piece presence / absence detecting means 6 is provided separately from the steel piece thickness measuring means 7, but the function of the steel piece presence / absence detecting means 6 can be replaced by the steel piece thickness measuring means 7. That is, based on data from a height sensor as the billet thickness measuring means 7, the presence or absence of a deformed billet can be detected. Thus, the steel piece presence / absence detecting means 6 and the steel piece thickness measuring means 7 can be integrated as, for example, a height sensor. However, in terms of simplifying the function and data processing of the height sensor, the steel piece presence / absence detecting means 6 and the steel piece thickness measuring means 7 may be provided separately as specialized for each function. preferable.
In this embodiment, the number of cutting craters is one, but a plurality of cutting craters may be provided.
Further, in this embodiment, the cutting crater is a gas cutting crater that uses gas (combustible gas and oxygen) as fuel, but a plasma cutting crater that uses plasma (plasma source) as fuel, and a laser that uses laser (laser source) as fuel. It can also be a cutting crater that uses other fuel, such as a cutting crater. That is, the cutting system of the present invention is not limited to a gas cutting system, but can be applied to other cutting systems such as a plasma cutting system and a laser cutting system.

DESCRIPTION OF SYMBOLS 1 Carriage 2 1st arm 3 2nd arm 4 Cutting crater 5 Preheating detection means 6 Steel piece presence / absence detection means 7 Steel piece thickness measurement means 8 First servomotor 8a Drive shaft 9 Pinion gear 10 Rack 11 Wheel 12 Guide rail 13a, 13b Cam follower 14 Base plate 15 Guide 16 Second servo motor 16a Drive shaft 17 First sprocket 18 Fixed plate 19 Second sprocket 20 Chain 21 Bracket S1-5 Deformed steel piece R rail

Claims (7)

A deformed billet cutting system for cutting a deformed billet while moving a cutting crater,
The cutting crater can move in the direction of cutting the deformed steel slab and can also move in the vertical direction.
Furthermore, the steel piece thickness measuring means capable of continuously measuring the thickness of the deformed steel slab, and a control means for controlling the operation of the cutting crater,
The control means, based on the data of the thickness of the deformed steel slab continuously measured by the steel slab thickness measuring means when cutting the deformed steel slab while moving the cutting crater, The vertical position of the cutting crater is continuously controlled so that the distance to the cutting crater is within a predetermined range, and the cutting is performed according to the predetermined thickness of the profile steel slab and the moving speed of the cutting crater. Deformed billet cutting system that continuously controls the movement speed of the crater.   The control means is based on data on the thickness of the deformed steel slab that the steel slab thickness measuring means continuously measures when cutting the deformed steel slab while moving the cutting crater. The shaped steel slab cutting system according to claim 1, wherein the fuel supply amount to the cutting crater is continuously controlled according to the relationship between the thickness of the fuel and the fuel supply amount to the cutting crater. It further comprises a steel piece presence / absence detecting means for detecting the presence or absence of a deformed steel piece,
The control means stops the cutting crater at a preheating position where preheating of the deformed steel slab is performed when the steel slab presence / absence detecting means detects the deformed steel slab, and the steel slab thickness measuring means is further stopped at the preheating position. Based on the measured data of the thickness of the shaped steel slab, the vertical position of the cutting crater is set so that the distance between the upper surface of the shaped steel slab and the cutting crater is within a predetermined range, and is determined in advance. The cutting system for a shaped steel slab according to claim 1, wherein the preheating time for the shaped steel slab is set according to the relationship between the thickness of the shaped steel slab and the preheating time.   The control means is based on the thickness data of the deformed steel slab measured by the steel slab thickness measuring means at the preheating position, and the relationship between the thickness of the predetermined steel slab and the amount of fuel supplied to the cutting crater. The cutting system of the shaped steel slab according to claim 1, wherein the fuel supply amount to the cutting crater is set in accordance with A preheating detecting means for detecting a preheating state of the preheating position of the deformed steel piece;
5. The control unit according to claim 3, wherein when the preheating position detected by the preheating detection unit reaches a predetermined preheating state, the control unit moves the cutting crater and starts cutting the deformed steel slab. Profile billet cutting system.   The variant according to any one of claims 3 to 5, wherein the control means sets the fuel supply amount to the cutting crater to a predetermined minimum amount if the steel piece presence / absence detecting means does not detect a deformed steel piece. Billet cutting system.   7. The control unit according to claim 3, wherein the control unit stops the cutting crater and stops the fuel supply to the cutting crater when the steel piece presence / absence detecting unit does not detect a deformed steel piece for a predetermined distance or more. Deformed billet cutting system as described.