JPS61236418A - Cutting method by side shear for side edge of thickness differenced plate - Google Patents

Abstract

PURPOSE:To enable side edges of a thickness differenced plate to be continuously and correctly cut, by turning the thickness differenced plate so that its step differenced part is parallelly positioned to a crop shear and cutting the both side edges by a side shear. CONSTITUTION:A point end 1C of a thickness differenced plate 1 is cut by a crop shear 14 in a shear line 10, and the cutting method, lowering a pair of measuring rolls 16A, 16B to be brought into contact with a cut section 1D and advancing the thickness differenced plate 1 to a position where the both rolls reach a step differenced part 1A, measures distances L1, L2 from two points P1, P2, separately placed in the cut section 1D, to the step differenced part 1A. And a control unit 20, driving an aligning device 22 so as to obtain a relation where L1=L2, turns a side of the point P2 about the point P1 serving as the reference till the step differenced part 1A comes to be placed parallelly to the crop shear 14. Thereafter, the method cuts both side edges 1B of the thickness differenced plate 1 by a side shear 18 successively the leading and trailing edges 1D, 1E by the crop shear 14.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an improvement in a method of cutting both side edges of a rolled plate material, particularly a differential thickness plate having different thicknesses in the longitudinal direction and having stepped portions transversely in the width direction, using side shears.

[Conventional technology]

When cutting both side edges of a rolled stepped plate with a different thickness, the stepped portions are required to be perpendicular to the cut side edges. Generally, when cutting both sides of a rolled plate, the plate is continuously cut by a side shear at the shear line, but plates with different thicknesses such as those mentioned above are continuously fed by table rolls at the shear line. At this time, it cannot be guaranteed that the stepped portion will be perpendicular to the side shear. For this reason, in the past, plates with different thicknesses were lowered from the shear line and both sides of the plate were manually cut using gas cutting to size, which resulted in a problem of extremely low cutting efficiency.

[Problems to be solved by the invention]

This invention has been made in view of the above-mentioned conventional problems, and is a method for cutting the side edges of a differential thickness plate using a side shear so that the side edges of the differential thickness plate can be continuously cut by the side shear at the shear line. The purpose is to provide

[Means to solve the problem]

This invention provides a method for cutting both side edges of a differential thickness plate having different thicknesses in the longitudinal direction and having stepped portions crossing in the width direction using a side shear, in which one longitudinal end of the differential thickness plate is cut by a crop shear. After the cutting process, the distance in the longitudinal direction of the differential thickness plate from the cutting opening to the stepped portion is measured at a position 2al in the width direction of the differential thickness plate, and the distance of the differential thickness plate by this measurement is Based on the difference between the measured values at two locations in the width direction, the stepped portion is
After rotating the differential thickness plate so that it is parallel to -,
The above object is achieved by cutting both side edges of the differential thickness plate using the side shear.

[Effect]

This invention takes advantage of the fact that the crop shear is arranged perpendicular to the side shear, cuts the tip of the differential thickness plate with the crop shear, and calculates the distance from the cut end to the step part to the width of the differential thickness plate. Measure at two positions in the direction, and based on the difference between the two measured values, rotate the differential thickness plate and position it so that the stepped part is parallel to the O-tube jar, that is, perpendicular to the side shear, and then Later, both side edges of the differential thickness plate are cut using side shears.

【Example】

Hereinafter, a shear line which is an apparatus for carrying out the method of cutting the side edge of a differential thickness plate using a side shear according to the present invention,
The process of cutting the differential thickness plate using this shear line will be explained in detail. A shear line 10 for cutting both side edges 1B of a differential thickness plate 1 having different thicknesses in the longitudinal direction and having stepped portions 1A crossing in the width direction as shown in FIG. 1 is shown in FIG. It is structured as follows. That is, from the front in the direction of conveyance of the differential thickness plate 1 by the table roll 12, the O-tube jar 14 and the aligning device 1 are removed.
3. The shear line 1o is constructed by arranging the side shears 18 in this order and arranging a pair of measuring rolls 16A and 16B in the width direction of the pass line within the setting range of the aligning device. The aligning device 13 controls the position of the differential thickness plate 1 on the table roll 12 by pushing it in an arbitrary direction, and is driven by a control device 2o. Further, the control device 2o is configured to calculate the inclination of the differential thickness plate 1 with respect to the pass line based on the measurement value signals from the measuring rolls 16A and 16B. In the step of cutting both side edges 1B of the differential thickness plate 1 using the shear line 10, first, the tip 1C of the differential thickness plate 1 is cut by the crop shear 14 as shown by the broken line in FIG. Next, the pair of left and right measuring rolls 16A, 16
B is lowered and brought into contact with the cutting opening 1D formed by the cutting process. Next, the measuring rolls 16A and 16B move to the stepped portion 1A.
The differential thickness plate 1 is advanced until it reaches the position. As a result, the measuring O-rules 16A and 16B are used to measure the direction perpendicular to the crop shear 14, that is, parallel to the side shear 18, from the two points PI and P2 spaced apart in the width direction of the cutting opening 1D to the stepped portion 1A. Direction distance L'l, L
2 is measured. Next, the difference between this measurement 1i1L+ and L2 is determined by the control O device 2
0, and the control device 20 drives the aligning device 13 based on this difference, so that the stepped portion 1A crops the other measurement start point P2 side with the one measurement start point P+ as a reference. Turn it until it becomes parallel to the shear 14. Thereafter, the differential thickness plate 1 is advanced to the position of the side shear 18, and the side edges 1B of the differential thickness plate 1 are cut by the side shear 18. Subsequently, by cutting the tip 1D and the tail end 1E to match the length of the product using the crop shear 14,
The cutting of the differential thickness plate 1 is completed. According to the inventor's experiments, the product size is 14/16am. A plate with a width of 3000 mm, a total length of 15000 mm, and a length of 8000 inches at a thickness of 16 nm was roughly cut using a crop shear, and as described above, a measuring roll 16A was cut.
, 16B, Ll on the reference side is 1509On,
When the Pz point side is 15120 mnt', the reference side is fixed, the measurement start point P2 is rotated 3 On, and both side edges 1B are cut by the side shear 18, as a result of the side shear cutting, the crop shear 14 and Stepped portion 1A is 3/300011* with respect to parallel imaginary lines
Although the value was sloped, this value does not meet the generally required accuracy of 4.
It fully satisfied 5/3000mm. In the above embodiment, the measurement starting point Pl of the cutting hole 1D
, the distance from P2 to the stepped portion 1A was measured by advancing the differential thickness plate 1 with respect to the measuring rolls 16A and 16B; It may be moved relative to 1. Alternatively, the measurement may be performed by other means. Furthermore, in the above embodiment, the differential thickness plate 1 is rotated after measurement by rotating the other measurement start point P2 around one measurement start point P1. It is sufficient that the attachment part 1A can be turned parallel to the O-tube jar 14, and P+
, Pz may be rotated around other reference points.

【Effect of the invention】

Since the present invention is configured as described above, it has an excellent effect in that the side edges of the differential thickness plate can be continuously and accurately cut by the side shear along the shear line.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a differential thickness plate to be cut by the method of the present invention, and FIG. 2 is a shear for carrying out the cutting method according to the present invention in which the side shear on the side edge of the differential thickness plate is FIGS. 3 and 4 are side views showing the structure of the lines, and plan views showing the process of cutting a differential thickness plate by the method of the present invention. 1... Differential thickness plate, 1A... Stepped part, 1B... Side edge, 1C River tip, 1D... Cutting opening, 10... Shear line, 12 River table roll, 14... Cropshire, 16A, 16B...Measuring roll, 18...
・Side shear.

Claims (1)

[Claims] (1) In a method of cutting both side edges of a differential thickness plate with a side shear, which has different thicknesses in the longitudinal direction and has a stepped portion that crosses the width direction, one longitudinal end of the differential thickness plate is cut with a crop shear. , after the cutting step,
The distance in the longitudinal direction of the differential thickness plate from the cut opening to the stepped portion is measured at two locations in the width direction of the differential thickness plate, and the difference between the measured values at the two locations in the width direction of the differential thickness plate is Based on this, the side edges of the differential thickness plate are cut by side shears after the differential thickness plate is turned so that the stepped portion is parallel to the crop shear. Cutting method using side shears.