JP2000126926A - Shearing device and shearing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately measure the effective length by providing a length measuring gauge for measuring the carrying length of a product and a large number of tip detecting sensors horizontally arranged so as to cross at a right angle to the product carrying direction. SOLUTION: A laser Doppler speedometer 2 is arranged on the upstream side of a shearing machine 1. Tip detecting sensors 3, 13, 23 are arranged in the product carrying direction on the downstream side of the shearing machine 1. In the detecting sensors 3 closest to the shearing machine 1, a large number of tip detecting sensors are horizontally arranged so as to cross at a right angle to the product carrying direction. The tip detecting sensors 3, 13, 23 detect the tip of a carried steel plate 10 when cutting off the light from a projector 4. Detecting values of a large number of tip detecting sensors 3 arranged so as to cross at a right angle to the carrying direction of the steel plate 10 are inputted to a nonperpendicular angle correcting dimension operation device 5, or are independently inputted to a measuring length synthesizing operation device 7 together with a signal from a length measuring operation device 6. The measuring length synthesizing operation device 7 is joined to a host computer 8 to arithmetically operates and outputs a length measured value when steel plate information is inputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a shearing device and a shearing method for accurately measuring the effective length of a moving product and shearing the product.

[0002]

2. Description of the Related Art Generally, a method for measuring the length of a moving product is as follows: (a) A transmitter that generates a pulse in accordance with the rotation of the roll by contacting a length measuring roll rotating with the movement of the material to be measured. (B) As shown in Japanese Patent Application Laid-Open No. 62-240805, a laser Doppler velocimeter using the Doppler effect of light is used. There is a non-contact type length measuring method in which a moving distance is calculated by measuring a speed of a measuring material and integrating the measured speed with a measuring time.

In the former method, a slip occurs between the length measuring roll and the measured material during acceleration and deceleration of the measured material, and a length measuring error occurs due to wear of the measuring roll. On the other hand, in the latter method, a speed measurement error or the like due to a change in the distance between the laser Doppler velocimeter and the material to be measured is integrated at the same time. Therefore, as the measurement length increases, the length measurement error may increase.

In order to solve such a problem, Japanese Patent Application Laid-Open No. H10-19546 discloses a method in which a laser Doppler velocimeter and a length measuring roll are used, and a plurality of tip detecting sensors for detecting the tip of a material to be measured are provided. The difference between the target shear length and the detected value is calculated using a laser Doppler velocimeter or a measuring roll, and the total is measured. A method has been proposed in which an error generated in accordance with a length measurement distance is reduced by calculating as a long value.

[0005]

In the above-described length measuring method,
Although the length measurement error generated according to the measured length can be reduced, only a specific point on the material to be measured is measured. Therefore, in order to cut the product, the product is cut by adding a margin for the non-right angle correction dimension compensation to the length measurement value.

[0006] Also, in the inspection of a product, the above-described method cannot perform length measurement in consideration of the effective length.

An object of the present invention is to develop and provide a shearing device and a shearing method which solve the above problems.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises a length measuring device for measuring the length of a product transported and a horizontal length orthogonal to the product transporting direction. A shearing device comprising a number of tip detection sensors.

It is preferable that the length measuring device is a Doppler velocimeter provided on the upstream side of the shearing machine, and the tip detection sensor is an optical sensor provided on the downstream side of the shearing machine.

[0010] Next, as described above, using a shearing device provided with a length measuring device for measuring the transport length of a product and a number of tip detection sensors arranged horizontally in a direction perpendicular to the product transport direction. Based on the transmitted product width information, select the two detection sensors that are farthest apart from each other within the range of the product width from among the multiple tip sensors, and determine the product tip determined by the time difference between the product detection times of the selected sensors. Calculate the non-right angle correction dimension of
There is provided a shearing method characterized in that a length measurement value is calculated by adding the non-rectangular correction dimension and a distance calculated by a length meter, and the product is sheared based on the length measurement value. Here, the non-right-angle correction dimension refers to a measured value of a difference between the left and right lengths of the product tip in the transport direction when the tip of the product is not perpendicular to the transport direction. This corresponds to the measured value A of the right angle deviation specified in JIS G3193.

It is preferable to use a Doppler velocimeter provided on the upstream side of the shearing machine as the length measuring instrument and to use an optical sensor provided on the downstream side as the tip detection sensor.

According to the present invention, the effective length of a product can be accurately and speedily measured by providing a length measuring instrument and a plurality of tip detection sensors disposed horizontally at right angles to the transport direction on the downstream side in the product unloading direction. Things.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, a length measuring instrument and a number of tip detecting sensors which are orthogonal to the conveying direction are provided downstream of the product unloading direction, and a sensor which can detect in advance from the product width of the material to be measured is selected. The non-square correction dimension of the product is calculated from the on / off timing of the two sensors at which the detectable sensor interval is the largest and the measurement value of the length meter between them, and the effective length in consideration of the non-square correction dimension Is calculated.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram when the length measuring system of the present invention is applied to the shearing device of the embodiment of the present invention. A laser Doppler velocimeter 2 and / or a length measuring roll (not shown) are provided upstream of the shearing machine 1, and a length measuring device 6 is provided. On the downstream side of the shearing machine 1, tip detection sensors 3, 13, and 23 are provided in the product transport direction. As shown in FIG. 2, the detection sensor 3 closest to the shearing machine is provided with a number of tip detection sensors that are orthogonal to the product transport direction and are horizontally disposed.

The tip detection sensors 3, 13, and 23 are
Steel plate (product) transported when light from the light is blocked
10 tips are detected. The detection values of a number of tip detection sensors 3 arranged orthogonally to the transport direction of the steel plate 10 are input to the non-rectangular correction dimension calculation device 5 and are combined with the signal from the length measurement calculation device 6 or alone for length measurement synthesis. The data is input to the arithmetic unit 7. The length-measurement / synthesis calculation device 7 is connected to the host computer 8, receives the steel plate information and the like, and calculates and outputs the length-measured value.

Each of the tip detection sensors 3, 13, and 23 measures in advance the distance from below the blade of the shearing machine, which serves as a reference point for length measurement, and as disclosed in JP-A-10-19546,
When a product is detected, its value is reflected in the measured value.

FIG. 2 shows an embodiment of the present invention in which a number of tip detection sensors 3a, 3a are arranged orthogonally to the transport direction.
The configuration diagram of b, ... is shown. In this example, the sensors are 3a to 3
i, and a detectable sensor is determined from the product width information transmitted by the host computer. The determined sensors are, for example, 3d to 3i. The two sensors 3d and 3i are set so that the distance is the longest among these sensors.
Is selected.

FIG. 3 is a diagram showing a correction method by the tip detection sensor. Two detecting sensors 3d, 3i calculates the distance L ₂ -L ₁ measured during the on as non-orthogonal correction dimensions. For example, the correction value detected by the sensor 13 detected thereafter is a length measurement value in consideration of the non-right-angle correction dimension L ₂ -L ₁ with respect to the distance L ₃ from the reference point to the sensor 13, and is thereafter measured by a Doppler meter. Add the distance and use it as the measured value.

This method is also effective when the products divided in the product length direction are transported in parallel and sheared at the same time, so that the shearing with the minimum dimensions can be compensated and the efficiency can be improved.

By introducing such a method, the variation in the effective length of the product is reduced, and as shown in FIG.
The occurrence rate of defective products due to defective measurement has been reduced.

[0022]

According to the present invention, a plurality of tip detecting sensors are installed so as to be perpendicular to the transport direction on the downstream side of the length measuring instrument and the product transport direction when the product is sheared, and the on / off timing of the tip detection is set. The effective length can be accurately measured by calculating the non-right angle correction dimension due to the deviation.

In addition, when the products cut in the length direction are simultaneously conveyed and the length is sheared, the cutting with the minimum dimension compensated is possible, and the effect of not only preventing the occurrence of defective products but also improving the efficiency is achieved. is there.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a system configuration of a shearing device according to an embodiment.

FIG. 2 is a front view showing an arrangement of sensors according to the embodiment.

FIG. 3 is an explanatory diagram showing a correction method based on tip detection by a sensor according to the embodiment.

FIG. 4 is a graph showing the effect of the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 shearing machine 2 laser Doppler velocimeter 3 tip detection sensor 4 floodlight 5 non-rectangular correction dimension calculation device 6 length measurement device 7 length measurement synthesis calculation device 8 host computer 10 steel plate (product)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Asayuki Orita 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. 1-chome (without address) F-term in Mizushima Works of Kawasaki Steel Corporation (reference) EE22 GG04 GG07 GG11 GG41 HH30 PP06 3C029 BB05 BB10

Claims (4)

[Claims] 1. A shearing device comprising: a length measuring device for measuring a product transport length; and a number of tip detection sensors disposed horizontally orthogonal to the product transport direction. 2. The apparatus according to claim 1, wherein the length measuring device is a Doppler velocimeter provided on the upstream side of the shearing machine, and the tip detection sensor is an optical sensor provided on the downstream side of the shearing machine. Shearing equipment. 3. Using the shearing device according to claim 1, select two detection sensors farthest from each other within a range of the product width from a number of tip sensors based on the transmitted product width information, Calculate the non-rectangular correction dimension of the product tip obtained from the time difference of the product detection time of the selected sensor, calculate the length measurement value by adding the non-rectangular correction dimension and the distance calculated by the length measuring instrument, and calculate the length measurement value. A method for shearing a product based on a shearing method. 4. The shearing method according to claim 3, wherein a Doppler velocimeter provided upstream of the shearing machine is used as the length measuring instrument, and an optical sensor provided downstream is used as the tip detection sensor. .