JPH02256415A - Dimension measuring device for sheet to be cut on metal strip continuous cutting line - Google Patents

Abstract

PURPOSE:To inspect the total number of metal strips for deviation in width and squareness by installing three deviation detectors between a leveler and shear on a metal strip continuous cutting line and calculating the sum of and difference between deviations from a specified position on the edge on the side of each strip detected. CONSTITUTION:A deviation detector 4, a deviation detector 5 and a deviation detector 6 are used to detect the deviations X, Z and Y, respectively, from a specified position on a side edge of a strip S. Then, operations on X-Z and X+Y are performed with an operation unit 9 and an operation unit 10, respectively. Output signals are supplied to a control unit 12 to be compared with the upper and lower reference values of squareness (X-Z) and deviation in width (X+Y). Upon detection of deviations from the reference values a signal is issued from the control unit 12 to lower a flapper 13 to a position indicated by 13' A cut sheet C' whose squareness and/or deviation in width are shifted from the reference values is discharged out of the line by way of the flapper 13', and a cut sheet C which satisfies dimensional accuracy is placed onto a piler 16 via a conveyor 15.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for measuring the dimensions of cut sheets in a continuous cutting line of metal strips, in particular the squareness of the cut sheets and the sheet width deviation.

[Conventional technology]

In a continuous cutting line for metal strips, the strip is unwound from an uncoiler, its side edges are trimmed by a side trimmer to a specified width, the flatness is corrected by a leveler, and then cut into specified dimensions by a shear. but,
As part of quality assurance, it is necessary to keep dimensional accuracy within a certain limit, so usually the sheet being cut is pulled out and the length (L), radius (W) and straightness of the cut sheet are measured as shown in Figure 4. The angle (IX-Zl) was actually measured.

[Problem to be solved by the invention]

However, such sampling inspection requires a large number of man-hours, and since it is not a 100% inspection, poor dimensional accuracy often occurs. In particular, strict precision is often required for the width and perpendicularity of cut sheets, and a system that can perform 100% inspection has also been desired.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide an apparatus for measuring dimensions of cut sheets in a continuous cutting line of metal strips, which enables 100% inspection of width deviation and squareness of cut sheets.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention has a continuous cutting line of a metal strip in which the metal strip is straightened by a leveler and then cut into a predetermined size by a shear. a first deviation detector for detecting a deviation of the strip side edge from a predetermined position; and a first deviation detector located near the strip side edge on the same side as the first deviation detector and further away from the shear a second deviation detector disposed at the first deviation detector; a third deviation detector disposed near the other side edge of the strip opposite to the first deviation detector; and a second deviation detector disposed at the first deviation detector. a first computing unit that calculates a difference between a value detected by the detector and a value detected by the second deviation detector; a value detected by the first deviation detector and a value detected by the third deviation detector; and a second calculation unit that calculates the sum of The present invention is characterized in that it is configured to measure the width deviation of the sheet to be cut from the sum of detected values obtained by the device.

[For production]

According to the present invention, three deviation detectors are arranged between a leveler and a shear in a continuous cutting line of metal strips, and the sum of the deviations of the edge of the strip from a predetermined position detected by each deviation detector, and By simply calculating the difference, the width deviation and squareness of the cut sheet can be continuously measured before cutting.

As shown in FIG. 3, the deviation output from each deviation detector corresponds well with the actual measured size of the cut sheet, making it possible to continuously measure the cut sheet size with high accuracy.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing one embodiment of the present invention.

The metal strip S unwound from an uncoiler (not shown) is trimmed to a predetermined width, then corrected for flatness by a leveler 1 to form a loop 2, passed through an auxiliary coil 8, and then cut to a predetermined width by a feed roll 7. The cutting length is determined, and the sheet C is cut in the length direction by the shear 3.

In the present invention, a deviation detector, for example a CCD camera, is disposed immediately before the feed roll 7 to detect deviation of the strip side edge from a predetermined position.

Specifically, the first deviation detector 4 detects the deviation X of the side edge of the strip S from a predetermined position as shown in FIG. The deviation Z is detected by the second deviation detector 5 disposed at the position shown in FIG. Further, a third deviation detector 6 disposed near the other side edge of the strip S facing the first deviation detector 4 detects the deviation Y.

These deviation output signals are sent to the calculator 9.10, and the first
The arithmetic unit 9 calculates X-Z, and the second arithmetic unit IO calculates X+Y, which are displayed on the oscilloscope 11. At the same time, the calculated output signal enters the controller 12 and is compared with the upper and lower limit reference values of the squareness (X-Z) and width deviation (x+y). Is there a restriction if the calculated output is out of the reference value? A signal is issued from the HF 112 to lower the flapper 13 to the position 13'. The cut sheet C is sent to the conveyor 15 via the flapper 13 by the conveyor 14, and the cut sheet C' whose perpendicularity and/or width deviation is outside the reference value is sent to the flapper 13, which is opened.
' and is discharged outside the line through reject piler 1.
7 will be loaded. Cut sheets C that satisfy dimensional accuracy are loaded onto a piler 16 via a conveyor 15.

〔Effect of the invention〕

As described above, according to the device for measuring dimensions of a cut sheet in a continuous metal strip cutting line according to the present invention, the width deviation and squareness of a cut sheet can be continuously measured with high precision prior to cutting. The number of man-hours required for conventional sampling inspections can be significantly reduced.

[Brief explanation of drawings]

Figure 1 is a perspective view showing one embodiment of the present invention, Figure 2 is an explanatory diagram showing the deviation of the side edge of the strip from a predetermined position detected by a deviation detector, and Figure 3 is the deviation output and actual dimension measurement. A graph showing the correspondence with the values, and FIG. 4 is an explanatory diagram showing a conventional method for measuring dimensions of cut sheets by sampling inspection. 1...Leveler 2...Loop 3...
Shear 4...first deviation detector 5...
Second deviation detector 6...Third deviation detector 7...
Feed roll 8...Auxiliary roll 9...First computing unit 10...Second computing unit 11...Oscillograph 12...Controller 13...Flamper
14... Conveyor 15... Conveyor 1
6... Piler 17... Reject Piler S... Strip C... Cut sheet Applicant Sumitomo Light Metal Industries Co., Ltd. Agent Patent attorney Masaya Takahata (1 other person)

Claims (1)

[Claims] 1. In the continuous cutting line of the metal strip where the metal strip is straightened with a leveler and then cut into a predetermined size with a shear, the metal strip is located near one side edge of the strip between the leveler and the shear at a predetermined position on the edge of the strip side. a first deviation detector for detecting deviation from the shear; and a second deviation detector disposed near the edge of the strip on the same side as the first deviation detector and further away from the shear than the first deviation detector. a third deviation detector disposed near the other side edge of the strip opposite to the first deviation detector; a first arithmetic unit that calculates a difference between the detected value and the detected value by the second deviation detector;
a second arithmetic unit that calculates the sum of the detected value by the deviation detector and the detected value by the third deviation detector, and is cut from the difference between the detected values obtained by the first arithmetic unit. Cutting on a continuous cutting line of a metal strip, characterized in that the width deviation of the sheet to be cut is measured from the sum of detected values obtained by the second computing unit. Sheet dimension measuring device.