JPH0613143B2 - Frame planar - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a frame planar used in a steel sheet cutting process.

(Prior Art) Conventionally, a thick steel plate that has been hot-rolled and straightened is cut into desired dimensions.

Conventionally, for example, gas cutting or plasma cutting has been performed off-line when cutting thick steel plates, but the demand for thick steel plates has increased thereafter, and this offline cutting method requires a large number of man-hours. Because of low productivity, labor saving and automation have been promoted for the purpose of improving productivity.

In recent years, for example, a method of cutting a steel plate online using a steel plate cutting device called a frame planar has been widely used. This method installs a rail for a large gate-shaped carriage around a steel plate, and mounts a plurality of gas cutting devices or plasma cutting devices on the gate-shaped carriage,
It is a method that enables cutting of many steel plates at the same time. This method is a method in which an operator, who is an operator, measures the dimensions of a steel sheet to be cut before starting the cutting, and then manually inputs the dimensions into the control unit of the frame planar to cause the frame planar to cut the steel sheet. Is.

In addition, the so-called optical cutting method is used to determine the cutting position by recognizing the entire shape of the steel plate by tracing the entire outer circumference of the steel plate to be cut by the sensor attached to the frame planar, and cutting the steel plate. It is widely known how to do it.

(Problems to be Solved by the Invention) However, these known methods cannot cut a steel sheet with high accuracy in a short time and without increasing the manufacturing cost.

In other words, in the method in which the operator actually measures the dimensions of the steel sheet before inputting them into the control section of the frame planar, it is necessary to input the shape of the steel sheet into the frame planar after the operator has measured the shape of the steel sheet. However, it takes a lot of man-hours and an error occurs during measurement, which makes it difficult to input accurate dimensions. Therefore, the improvement is desired.

Further, in the method using the optical cutting method, it is necessary to measure the entire circumference of the steel sheet to be cut before cutting, and therefore a long time is required for measurement and sensing prior to the measurement.
Further, curling up and cutting down of surface scratches and the like are performed by the operator's visual judgment input, and automatic measurement of only the shape is not very effective. Therefore, the improvement is still desired.

According to the publicly known method described in detail above, the steel sheet could not be cut with high accuracy in a short time and without increasing the cost.

An object of the present invention is to provide a frame planer capable of solving the above problems.

(Means for Solving the Problems) As a result of various studies conducted by the present inventors to solve the above problems, (a) a two-dimensional sensor installed on a frame planar and (b) at least a steel plate installed on a steel plate. A frame planar equipped with a sufficient number of targets for recognizing a quadrangle, and (c) a calculator for calculating an accurate cutting position of a steel plate from the measured value of the target measured by the sensor and the position of the frame planar at this time. It has been found that the above problems can be solved by using.
That is, when sensing a steel sheet, a two-dimensional sensor installed in a frame planar on the steel sheet is used for sensing, and in order to allow the above sensor to accurately detect the shape of the steel sheet, targets are set on a plurality of portions on the steel sheet. Has been installed,
By sensing only the part where this target is installed with the above sensor, including the cut-down judgment processing based on the current operator's judgment, the cutting of steel sheet can be performed with high accuracy in a short time and the cost can be increased. The present invention has been completed by finding that it is possible to provide a frame planer that can be performed without using the frame planer.

Here, the gist of the present invention is a frame planer having a cutting machine that is installed above a steel plate and moves vertically and horizontally above the steel plate to cut the steel plate into desired dimensions. A sensor installed on the frame of the frame planer; (ii) a plurality of targets installed on any part of the steel plate, which is sufficient to recognize at least a square; and (iii) the target within the sensor coordinates sensed by the sensor. The position and the absolute position of the target relative to the frame planar from the position of the frame planar in the sensor coordinates at this time are respectively calculated, and based on the calculation result, the steel plate shape surrounded by the target is stored as a polygon. The shape of the steel sheet to be cut is calculated by comparing the stored polygon with the shape and dimensions of the steel sheet to be cut input by the operator in advance. And a calculator for determining a cutting position so that the dimensions can be accommodated in the stored polygon and outputting the frame planar movement signal to the drive unit of the frame planar according to the determined cutting position. Is a frame planer.

(Operation) The present invention will be described in detail below with reference to Examples. Note that this is merely an example of the present invention, and the present invention is not unduly limited by this.

As described above, the configuration of the present invention is a frame planar equipped with a sensor installed in the frame planar, targets installed in a plurality of portions on the surface of the steel plate, and a calculator.

This structure will be described in detail with reference to FIG.

FIG. 1 is a schematic perspective view showing a frame planar according to the present invention. A sensor 2 that scans the surface of the steel plate 4 is provided on a frame planar 1 that is above the steel plate 4 and moves vertically and horizontally over the steel plate to cut the steel plate. A plurality of targets 3 are installed on the surface of the steel plate 4. Further, in FIG. 1, 5 is a gas cutter attached to the frame planer 1, and 6 is a computing unit of the frame planer 1.

First, the sensor 2 will be described with reference to FIG.

FIG. 2 is a schematic explanatory view showing a sensor according to the present invention. As the sensor 2, it is desirable to use a light spot position measurement sensor using a non-split type element (PSD) and capable of measuring the secondary position of the light spot. That is, as a sensor capable of generally measuring a position, a sensor using a scanning image device such as a vidicon or a CCD, a sensor using a dividing device such as a photodiode array, etc. are known. From the viewpoint of high speed and continuous measurement, it is desirable to use a sensor provided with a non-divided element such as a semiconductor. In FIG. 2, an infrared filter 22 and a background light removing circuit (not shown) are built in the inside of the sensor head 21 at the tip of the sensor body 2, and the influence of light other than the light emitted by the target 3 described later is exerted. Without receiving
The structure is such that the position of the target 3 can be accurately detected.

The light incident from the target 3 detected by the sensor head 21 in this manner is input to the non-split type element described above. An example of this non-divided element is a structure in which a P-layer is provided on the surface of a rectangular plate-like silicon, an N-layer is provided on the back surface, and an I-layer is provided in the middle thereof, and charges proportional to incident light are generated. The generated charge becomes a photocurrent, passes through the surface of the P layer, and is output from multiple electrodes placed on each side. Since the P layer is made to have a uniform electric resistance value over the entire surface, the photocurrent is divided in inverse proportion to the distance to the plurality of electrodes and taken out from the electrodes.

The photocurrent thus extracted from the plurality of electrodes is
It is output to the calculator (6 in FIG. 1) as the current of the light spot, that is, as the current that accurately conveys the installation position of the target in the field of view of the sensor. Then, in the arithmetic unit, voltage conversion and division are performed together with position data of the frame planar 1 at this time, which will be described later, and a two-dimensional coordinate voltage corresponding to the installation position of the target 3 with respect to the frame planar 1 is created. Then, the computer memorized the shape and dimensions of the steel plate as a polygon having this target installation position as a vertex and input it from the operator. The shape and dimensions of the steel plate to be cut and the shape of the remembered polygon
The cutting position of the steel plate is determined by comparison with the dimensions. Then, a frame planar movement signal is output to the drive unit of the frame planar 1 according to the determined cutting position.

The mounting position of the sensor 2 on the frame planer 1 is not particularly limited, but it is desirable to be at the center in the width direction of the frame planar 1 in order to optimize the processing range of the sensor. Target 3 again
If the distance to is about 500 to 1000 mm, the field of view of the sensor 2 is a rectangle of about 500 × 500 mm on the steel plate 4, which is preferable because the target 3 can be easily detected.

Further, as a method of mounting the sensor, it is desirable that the frame planar 1 is securely and firmly fixed through a bolt and a fixing plate so as not to wobble due to the movement of the frame planar 1 or fall off in the worst case.

Further, the number of installations is not particularly limited and may be one, but in order to shorten the time required for detection and improve the detection accuracy, it is further necessary to install about four pieces on the torch head of the frame planar. desirable.

Next, the target 3 installed on the surface of the steel plate 4 will be described. On the surface of the steel plate 4 to be cut in FIG. 1, a plurality of targets 3 for detecting their positions by the sensor 2 are installed. The target used in the present invention may be any target as long as its presence position can be confirmed by the sensor 2 described above, and its type and the like are not particularly limited, but in the present invention, the target 3 is red. It is desirable to use a point light source target of the outer LED. That is, since the infrared filter 22 and the background light removing circuit are used in the sensor head 21 described above, it is necessary to completely remove the light emitted from other than the LED target 3 to accurately obtain the installation position of the target 3. Because you can

The number of the LED targets 3 to be installed is not particularly limited and may be appropriately selected according to the shape and size of the steel plate 4 to be cut, but in order to recognize the accurate shape of the steel plate 4, It is preferable that the operator visually recognizes and determines the outline of the steel plate 4 and installs the LED target 3 on the steel plate 4 so that the LED target 3 becomes the apex of the convex polygon.

Further, in the case where a defective portion or the like exists on the steel plate 4, the target 3 may be installed at the boundary between the defective portion and the good portion.

That is, since the final purpose is to cut out a rectangular steel plate, the shape of the base material may be simplified to be a convex polygon.

Furthermore, by transmitting the rough dimension data of the base material before cutting to, for example, the production management CPU to the arithmetic unit of the frame planer, if the target 3 is installed at one point on the base material, the base material will have a convex polygonal shape. Can also be recognized as

The operator installs the steel plate 4 on the surface, but unlike the conventional method of measuring the steel plate 4 in the frame planer cutting method, it does not require a lot of man-hours, and the LED target is simply installed on the steel plate 4. Since it is good, it is possible to significantly reduce the man-hours. Further, in the arithmetic unit according to the conventional method, the arithmetic logic in the corner portion of the steel sheet is complicated and the processing time is delayed. However, in the processing apparatus according to the present invention, the steel sheet is recognized as a convex figure, and therefore the arithmetic logic is Is extremely simple, and the processing time can be greatly reduced.

The position of the frame planar 1 that moves vertically and horizontally over the steel plate 4 is detected by a position detector installed outside the frame of the frame planar for detecting the position in the length direction of the steel plate, and the position in the width direction of the steel plate. The detection is exemplified by a detector installed in the frame of the frame planar 1. Needless to say, the installation positions of these detectors are not particularly limited. As a detector, a laser interferometer,
A PLG that counts the number of revolutions of the vehicle of the gate type trolley or a detector of a pulse wave emitted by the commutator of the drive motor of the frame planer 1 may be used, and no limitation is required.

The frame planar 1 provided with the optimum cutting position for the steel plate 4 in this way converts the movement data above the steel plate 4 taught in advance into the optimum value,
The steel plate 4 is cut. This will be described in more detail with reference to FIG.

FIG. 3 is a plan view of the frame planar 1 according to the present invention, in which the steel plate 4 is fed in the direction of the arrow in FIG. 3 and is cut by the frame planar 1 to a desired size.

Further, points A, B, C and D on the steel plate indicate positions where the LED target 3 is installed.

First, when the conveyed steel plate 4 stops at a predetermined position in the frame planer 1, the operator installs the LED target 3 at the points A to D. LED here
Although the target 3 is installed at four points, it is not particularly limited to this, and may be appropriately selected according to the shape of the steel sheet to be cut.

Then, the frame planer 1 first moves vertically and horizontally above the steel plate, and the sensor 2 attached to the frame planer 1 causes the LED target 3 to be installed at positions A to D.
Accurately measure points. As shown in FIG. 4, the sensor 2 has a position 1 in the sensor coordinates corresponding to the field of view of the sensor.
The positions of the LED target 3 are represented by two-dimensional coordinates (x ₁ , y ₁ ), (x ₂ , y ₂ ), (x ₃ , y ₃ ), and (x ₄ , recognized as y ₄ ).

The position of the frame planar 1 at the time of measuring these four points, that is, the position of the torch head (X ₁ , Y ₁ ), (X ₂ ,
Y ₂ ), (X ₃ , Y ₃ ) and (X ₄ , Y ₄ ) data and their corresponding target positions in sensor coordinates (x ₁ , y ₁ ),
From (x ₂ , y ₂ ), (x ₃ , y ₃ ) and (x ₄ , y ₄ ), the LED
The absolute installation position (X _p , Y _p ) of the target 3 with respect to the frame planar is calculated based on the following formula. That is, (X _Pn , Y _Pn ) = (x _n , y _n ) + (X _n , Y _n ) However, in this example, n = 1, 2, 3 or 4 (X _P1 ,
Y _P1 ), (X _P2 , Y _P2 ), (X _P3 , Y _P3 ) and (X _P4 ,
Y _P4 ) is recognized as a quadrangle having vertices (a quadrangle surrounded by a broken line in FIG. 3), and a comparison operation is performed so that the shape to be cut input by the operator in advance is accommodated in the quadrangle, The cutting position is determined.

Further, as a result of this calculation, when the shape to be cut cannot be accommodated in the quadrangle, the arithmetic unit is provided with a circuit for outputting an abnormal signal, and based on the abnormal signal. The operator changes the installation position of the LED target 3 and then the target 2 by the sensor 2 again.
Needless to say, the cutting position of the steel sheet may be determined by repeating the above detection and the determination of the cutting position.

(Effects of the Invention) As described in detail above, the present invention does not require a large number of man-hours such as measurement before cutting, unlike the conventional method. Therefore, one operator of the frame planer is sufficient. Labor saving can be achieved.

Unlike the conventional method, it is not necessary to measure the entire circumference of the steel sheet, which means that the measurement time is greatly shortened and productivity is improved.The steel sheet is located at the top of the LED target.
Since it is recognized as a polygon with a simple shape, the arithmetic logic when performing the cutting operation is extremely simplified, it is possible to increase the calculation speed, and since the cutting operation is determined by a simple calculation, there is an error. It is possible to perform extremely small and accurate plate cutting.

Since the equipment has a simple structure, it is inexpensive and can be easily added to an already installed frame planar.

It will be possible to obtain the effect.

The practical effects of the present invention having such effects are extremely remarkable.

[Brief description of drawings]

1 is a schematic perspective view showing a frame planar according to the present invention; FIG. 2 is a schematic perspective view of a sensor used in the frame planar according to the present invention; FIG. 3 is a schematic diagram showing a frame planar according to the present invention. FIG. 4 is a plan view showing the sensor visual field. 1: Frame planer, 2: Sensor 3: Target, 4: Steel plate 5: Gas cutter, 6: Calculator 21: Sensor head, 22: Infrared filter

Claims (1)

[Claims] 1. A frame planer having a cutting machine installed above a steel plate and moving vertically and horizontally above the steel plate to cut the steel plate to a desired size. (I) The frame planer is installed on a frame of the frame planer. Sensor, and (ii) a plurality of targets installed on any part of the steel plate that are sufficient for recognizing at least a quadrangle; (iii) the target position in the sensor coordinates sensed by the sensor; and the sensor at this time. The absolute position of the target with respect to the frame planar is calculated from the position of the frame planar in the coordinates, and the steel plate shape surrounded by the target is stored as a polygon based on the calculation result. The shape and size of the steel plate to be cut, which has been input in advance, are compared and calculated, and the shape and size of the steel plate to be cut are stored in the memory. Determining the cutting position to be received within rectangular frames planar, characterized in that an arithmetic unit for outputting a frame planar movement signal to the driving section of the frame planar with the determined cutting position.