Silicon steel strip shearing method

Abstract

The application provides a silicon steel strip shearing method, which comprises the following steps: winding the silicon steel strip by a winding machine and shearing the silicon steel strip by a rotary shear; detecting the width of the silicon steel strip during the winding process; and adjusting the winding speed according to the following formula when the width of the silicon steel strip is lower than a set value: V=300-163tan-1(x / 20); wherein V is the winding speed, and the unit is m / min; and x is the reduced width, and the unit is mm. The silicon steel strip shearing method can reduce the probability of strip breakage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metallurgy, in particular to a silicon steel strip shearing method. BACKGROUND

[0002] Silicon steel product is an important metal material in economic development, which requires low iron loss, high magnetic induction and high quality of edge part. The cast-rolled production line has significant advantages in iron loss and magnetic induction, but the edge crack often exists in the edge part, which is more than 100mm in depth.

[0003] For the edge problem of cast-rolled silicon steel, only edge cutting can be carried out in the subsequent finishing process, but the risk of strip breakage caused by edge crack defects in the finishing cutting process has not been completely solved. SUMMARY

[0004] Therefore, it is necessary to provide a silicon steel strip shearing method to reduce the risk of strip breakage.

[0005] A silicon steel strip shearing method, comprising the steps of:

[0006] winding the silicon steel strip by a winding machine and shearing the silicon steel strip by a rotary shear;

[0007] detecting the width of the silicon steel strip during winding;

[0008] when the width of the silicon steel strip is less than a set value, adjusting the winding speed according to the following formula,

[0009] V=300-163tan -1 (x / 20);

[0010] wherein V is the winding speed, unit m / min; x is the reduced width, unit mm.

[0011] Further, the thickness of the silicon steel strip is 0.7-1.9mm, and the width is 900-1580mm.

[0012] Further, the inner diameter of the wound silicon steel coil is 610-762mm, the outer diameter is 1000-2050mm, and the weight of the silicon steel coil is not more than 32000kg.

[0013] Further, the composition of the silicon steel strip is wt%: C≤0.0050, Si 1.0-2.0, Mn 0.2-0.8, Al 0.1-0.5, P≤0.04, S≤0.01, N≤0.04, Cr, Ni, Cu≤0.05, Nb, Ti, V≤0.004.

[0014] Further, in the process of winding the silicon steel strip, the silicon steel strip is also tensioned and straightened by a tension straightening machine. ADVANTAGEOUS EFFECTS

[0015] The application provides an automatic production technology of edge cutting speed and tension setting in linkage with front width detection, which greatly reduces the risk of strip breakage while ensuring the quality of silicon steel edge cutting.

[0016] The application limits the corresponding relationship between the width and the winding speed (tension) through a specific formula. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A flowchart of the silicon steel strip shearing method of the embodiment of the application. EMBODIMENT

[0018] The embodiments of the application will be described below in conjunction with the accompanying drawings of the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments.

[0019] It should be noted that when one component is considered to be "connected" to another component, it can be directly connected to the other component or can exist simultaneously with a middle component. When one component is considered to be "provided on" another component, it can be directly provided on the other component or can exist simultaneously with a middle component. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and the like used herein are for illustrative purposes only.

[0020] Some embodiments of the application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0021] Please refer to Figure 1 The application provides a silicon steel strip shearing method, comprising the steps of:

[0022] The silicon steel strip is wound by a winding machine and sheared by a rotary shears;

[0023] During the winding process, the width of the silicon steel strip is detected;

[0024] When the width of the silicon steel strip is less than a set value, the winding speed is adjusted according to the following formula,

[0025] V=300-163tan -1 (x / 20);

[0026] Wherein V is the winding speed, unit m / min; x is the reduced width, unit mm.

[0027] Further, the thickness of the silicon steel strip is 0.7-1.9mm, and the width is 900-1580mm.

[0028] Further, the inner diameter of the coiled silicon steel coil is 610-762 mm, the outer diameter is 1000-2050 mm, and the weight of the silicon steel coil is not greater than 32000 kg.

[0029] Further, the composition of the silicon steel strip is wt%: C≤0.0050, Si 1.0-2.0, Mn 0.2-0.8, Al 0.1-0.5, P≤0.04, S≤0.01, N≤0.04, Cr, Ni, Cu≤0.05, Nb, Ti, V≤0.004.

[0030] Further, in the coiling of the silicon steel strip, the silicon steel strip is also tensioned by the tension leveler.

[0031] The present application sets up a width detector before and after the welding machine of the finishing line and the detector is linked with the operation system, the width detector after the welding machine is for real-time detection, when the width is found to be abnormally reduced (i.e. there is edge crack), the cutting speed of the section is adjusted according to the reduced width, V=300-163tan -1 (x / 20), x is the edge crack length (unit: mm), V is the running speed of the finishing line (unit: m / min), after the abnormal point is cut and passes through the width detector before the coiling, the feedback is given to the running system of the finishing line, and the system starts to speed up; of course, the priority of the detection of the front width detector to feedback to the running system to slow down is higher than the request of the rear width detector to speed up.

[0032] The present application is further described below by some examples.

[0033] Example 1: The silicon steel produced by the casting and rolling line is basically intact at the edge, and there is a small amount of small edge crack. The automatic cutting system is operated.

[0034] Comparison 11: The silicon steel produced by the casting and rolling line is basically intact at the edge, and there is a small amount of small edge crack. The constant speed 280 m / min cutting is adopted.

[0035] Comparison 12: The silicon steel produced by the casting and rolling line is basically intact at the edge, and there is a small amount of small edge crack. The constant speed 180 m / min cutting is adopted.

[0036] Comparison 13: The silicon steel produced by the casting and rolling line is basically intact at the edge, and there is a small amount of small edge crack. The constant speed 80 m / min cutting is adopted.

[0037] Example 2: The silicon steel produced by the casting and rolling line has rotten edge at the edge, and there are many and deep edge cracks. The automatic cutting system is operated.

[0038] Comparison 21: The silicon steel produced by the casting and rolling line has rotten edge at the edge, and there are many and deep edge cracks. The constant speed 240 m / min is adopted.

[0039] Comparative 22: Silicon steel produced on a casting and rolling line, with ragged edges and many deep edge cracks. The line was run at a constant speed of 140 m / min.

[0040] Comparative 23: Silicon steel produced on a casting and rolling line, with ragged edges and many deep edge cracks. The line was run at a constant speed of 40 m / min.

[0041] Shearing speed m / min Whether the tape is broken Number of edge trimming chasers Edge trimming quality Example 1 Automatic, average 263 No 0 Good Comparative 11 280 No 3 With a small amount of burr Comparative 12 180 No 1 Good Comparative 13 80 No 0 Good Example 2 Automatic, average 171 No 2 Good Comparative 21 240 Yes 6 With a large amount of burr Comparative 22 140 Yes 3 With a small amount of burr Comparative 23 40 No 2 Good

[0042] In addition, those skilled in the art should recognize that the above embodiments are merely illustrative of the present application and are not intended to limit the present application, and any suitable changes and modifications made to the above embodiments within the spirit and scope of the present application are within the disclosure of the present application.

Claims

1. A method of shearing a silicon steel strip, characterized by, The method comprises the steps of: coiling the silicon steel strip by a coiler and cutting the silicon steel strip by a flying shear; detecting the width of the silicon steel strip during the coiling; when the width of the silicon steel strip is lower than a set value, adjusting the coiling speed according to the following formula, V = 300 - 163 tan -1 (x / 20); wherein V is the coiling speed, unit: m / min; x is the reduced width, unit: mm.

2. The silicon steel strip shearing method according to claim 1, characterized by, The silicon steel strip has a thickness of 0.7-1.9 mm and a width of 900-1580 mm.

3. The method of claim 2, wherein, The coiled silicon steel coil has an inner diameter of 610-762 mm and an outer diameter of 1000-2050 mm, and the weight of the silicon steel coil is not greater than 32000 kg.

4. The silicon steel strip shearing method of claim 1, wherein, The silicon steel strip has a composition of wt%: C≤0.0050, Si 1.0-2.0, Mn 0.2-0.8, Al 0.1-0.5, P≤0.04, S≤0.01, N≤0.04, Cr, Ni, Cu≤0.05, Nb, Ti, V≤0.

004.

5. The method of claim 1 wherein, During the coiling of the silicon steel strip, the silicon steel strip is also tension-straightened by a tension-straightening machine.

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