CN108273871B - Method for straightening middle-low grade non-oriented silicon steel by straight-end machine - Google Patents
Method for straightening middle-low grade non-oriented silicon steel by straight-end machine Download PDFInfo
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- CN108273871B CN108273871B CN201810312028.7A CN201810312028A CN108273871B CN 108273871 B CN108273871 B CN 108273871B CN 201810312028 A CN201810312028 A CN 201810312028A CN 108273871 B CN108273871 B CN 108273871B
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- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
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Abstract
The invention provides a method for straightening middle and low grade non-oriented silicon steel by a head straightening machine, wherein the head straightening machine comprises a No. 2 straightening roller, a No. 4 straightening roller and a No. 6 straightening roller which are positioned at the upper row, and a No. 1 straightening roller, a No. 3 straightening roller, a No. 5 straightening roller and a No. 7 straightening roller which are positioned at the lower row, and the method for straightening the middle and low grade non-oriented silicon steel by the head straightening machine comprises the following steps: calibrating zero roll gap positions of a No. 2 straightening roll, a No. 4 straightening roll and a No. 6 straightening roll; determining the plate shape value of the low-grade non-oriented silicon steel strip in the raw material; determining the pressing amount of a No. 2 straightening roller, the pressing amount of a No. 4 straightening roller and the pressing amount of a No. 6 straightening roller according to the plate shape value of the low-grade non-oriented silicon steel strip in the raw material; and threading the low-grade and medium-grade non-oriented silicon steel strip in the raw material into a straightening head machine, and straightening the low-grade and medium-grade non-oriented silicon steel strip in the raw material according to the pressing amount of the No. 2 straightening roller, the pressing amount of the No. 4 straightening roller and the pressing amount of the No. 6 straightening roller. According to the technical scheme, the straightening machine is butted with an upstream hot rolling raw material process, the straightening machine is adjusted according to the plate shape value of the low-grade non-oriented silicon steel strip in the raw material of the upstream process, seamless butting is guaranteed, the rolling reduction does not need to be tested repeatedly, and the straightening efficiency of the low-grade non-oriented silicon steel strip in the raw material is high.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a method for straightening middle and low grade non-oriented silicon steel by a straight-head machine.
Background
In order to ensure the continuous and stable operation of the unit, an automatic welder is generally used to weld the front and rear steel strips within a specified time. The welding machine is efficient and precise welding equipment, can quickly complete steel strip welding work, and also puts high requirements on welding materials. The welder needs to adjust the welding parameters according to the basic information (including thickness, width, material, chemical composition and the like) of the welding material, but also puts higher requirements on the shape of the welding material. For this purpose, a straight head machine is arranged in front of a welding machine on a production line to straighten the head and the tail of the material, so that the head and the tail of the welding material, namely the steel strip, are straight.
The straight head machine extrudes the steel strip through the straightening roller to change the straightness. Generally, two rows of straightening rollers are arranged, the number of the straightening rollers is different, and materials with different diameters are straightened by means of the change of the rolling reduction of the two rollers. The principle of the straight head machine is that the bending part of the material bears considerable reverse bending or stretching, so that the part generates certain elastic-plastic deformation, and after the external force is removed, the steel material is elastically restored and then is straightened. The prior art adopts a seven-roller straight-head machine, the upper roller is pressed down, and the method for straightening middle and low grade non-oriented silicon steel by the straight-head machine is that the straightening machine directly straightens the head of a steel strip, judges whether the setting of the pressing amount of the straightening machine is reasonable or not according to the straightening effect of the head of the steel strip, and can determine the optimal pressing amount only by repeatedly testing the pressing amount, and the setting of the pressing amount is complicated and consumes longer working hours.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
Therefore, the invention aims to provide a method for straightening middle and low-grade non-oriented silicon steel by a straight-head machine.
In view of the above, the technical scheme of the present invention provides a method for straightening low-and-medium-grade non-oriented silicon steel by a straight-head machine, wherein the straight-head machine comprises a No. 2 straightening roller, a No. 4 straightening roller and a No. 6 straightening roller which are positioned on an upper row, and a No. 1 straightening roller, a No. 3 straightening roller, a No. 5 straightening roller and a No. 7 straightening roller which are positioned on a lower row, the No. 1 straightening roller and the No. 7 straightening roller are respectively positioned at two ends, and the method for straightening the low-and-medium-grade non-oriented silicon steel by the straight-head machine comprises: calibrating zero roll gap positions of a No. 2 straightening roll, a No. 4 straightening roll and a No. 6 straightening roll; determining the plate shape value of the low-grade non-oriented silicon steel strip in the raw material; determining the pressing amount of a No. 2 straightening roller, the pressing amount of a No. 4 straightening roller and the pressing amount of a No. 6 straightening roller according to the plate shape value of the low-grade non-oriented silicon steel strip in the raw material; and threading the low-grade and medium-grade non-oriented silicon steel strip in the raw material into a straightening head machine, and straightening the low-grade and medium-grade non-oriented silicon steel strip in the raw material according to the pressing amount of the No. 2 straightening roller, the pressing amount of the No. 4 straightening roller and the pressing amount of the No. 6 straightening roller.
Further, zero roll gap positions of No. 2 straightening roll, No. 4 straightening roll and No. 6 straightening roll are calibrated, and the method comprises the following steps: the method comprises the steps of placing and tensioning a first steel wire between the operation side of a straightening roller No. 1 and the operation side of a straightening roller No. 7, placing and tensioning a second steel wire between the transmission side of the straightening roller No. 1 and the transmission side of the straightening roller No. 7, pressing down the straightening roller No. 2, the straightening roller No. 4 and the straightening roller No. 6 respectively, and if the operation side of the straightening roller No. 2, the operation side of the straightening roller No. 4 and the operation side of the straightening roller No. 6 simultaneously contact a first steel wire and the transmission side of the straightening roller No. 2, the transmission side of the straightening roller No. 4 and the transmission side of the straightening roller No. 6 simultaneously contact a second steel wire, setting the straightening roller No. 2, the straightening roller No. 4 and the straightening roller No. 6 to be in a zero roll gap position.
Wherein, further, if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is not more than 15I, the rolling reduction of the No. 2 straightening roller is-8 mm, the rolling reduction of the No. 4 straightening roller is-4 mm, and the rolling reduction of the No. 6 straightening roller is (the thickness of the low-grade non-oriented silicon steel strip in the raw material is-0.5) mm; if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is larger than 15I and not larger than 25I, the rolling reduction of the No. 2 straightening roller is-10 mm, the rolling reduction of the No. 4 straightening roller is-5 mm, and the rolling reduction of the No. 6 straightening roller is (the thickness of the low-grade non-oriented silicon steel strip in the raw material is-0.5) mm; if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is more than 25I and not more than 40I, the rolling reduction of the No. 2 straightening roller is-12 mm, the rolling reduction of the No. 4 straightening roller is-6 mm, and the rolling reduction of the No. 6 straightening roller is (the thickness of the low-grade non-oriented silicon steel strip in the raw material is-0.5) mm; if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is greater than 40I, the rolling reduction of the No. 2 straightening roller is-15 mm, the rolling reduction of the No. 4 straightening roller is-8 mm, and the rolling reduction of the No. 6 straightening roller is (the thickness of the low-grade non-oriented silicon steel strip in the raw material is-0.5) mm.
Preferably, the diameter of the first steel wire is not more than 0.5mm and the diameter of the second steel wire is not more than 0.5 mm.
The invention has the following beneficial technical effects:
and the rolling reduction of the No. 2 straightening roller, the rolling reduction of the No. 4 straightening roller and the rolling reduction of the No. 6 straightening roller are determined according to the plate shape value of the low-grade and medium-grade non-oriented silicon steel strip in the raw material, and the No. 2 straightening roller, the No. 4 straightening roller and the No. 6 straightening roller are pressed down according to the rolling reduction of the No. 2 straightening roller, the rolling reduction of the No. 4 straightening roller and the rolling reduction of the No. 6 straightening roller so as to straighten the low-grade and medium-grade non-oriented silicon steel strip in the raw material. The method is butted with an upstream hot rolling raw material process, the straightening machine is adjusted according to the plate shape value of the low-grade non-oriented silicon steel strip in the raw material of the upstream process, seamless butting is guaranteed, the rolling reduction does not need to be tested repeatedly, and the straightening efficiency and the production efficiency of the low-grade non-oriented silicon steel strip in the raw material are high.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a front view of a prior art straight-head machine;
FIG. 2 shows a schematic top view of a prior art straight head machine;
the correspondence between reference numerals and component names in fig. 1 to 2 is:
number 101 straightening roll, number 202 straightening roll, number 303 straightening roll, number 404 straightening roll, number 505 straightening roll, number 606 straightening roll, number 707 straightening roll, 80 first steel wire, 90 second steel wire;
FIG. 3 shows a schematic flow chart of a method for straightening low grade non-oriented silicon steel in a straight head machine according to one embodiment of the present invention.
Detailed Description
So that the manner in which the above recited aspects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1 to 3, a method for straightening low-grade non-oriented silicon steel by a straight head machine according to an embodiment of the present invention includes a number 2 straightening roll 20, a number 4 straightening roll 40, and a number 6 straightening roll 60 at an upper row, and a number 1 straightening roll 10, a number 3 straightening roll 30, a number 5 straightening roll 50, and a number 7 straightening roll 70 at a lower row, the number 1 straightening roll 10, and the number 7 straightening roll 70 being respectively located at both ends, the method for straightening low-grade non-oriented silicon steel by the straight head machine including: step S102, calibrating zero roll gap positions of the No. 2 straightening roll 20, the No. 4 straightening roll 40 and the No. 6 straightening roll 60; step S104, determining the plate shape value of the low-grade non-oriented silicon steel strip in the raw material; step S106, determining the reduction of the No. 2 straightening roller 20, the reduction of the No. 4 straightening roller 40 and the reduction of the No. 6 straightening roller 60 according to the plate shape value of the low-grade non-oriented silicon steel strip in the raw material; and S108, threading the low-grade non-oriented silicon steel strip in the raw material into a straight head machine, and straightening the low-grade non-oriented silicon steel strip in the raw material according to the rolling reduction of the No. 2 straightening roller 20, the rolling reduction of the No. 4 straightening roller 40 and the rolling reduction of the No. 6 straightening roller 60.
The head straightening machine comprises two rows of straightening rollers, wherein the straightening rollers are a No. 2 straightening roller 20, a No. 4 straightening roller 40 and a No. 6 straightening roller 60 which are positioned on the upper row, the straightening rollers are a No. 1 straightening roller 10, a No. 3 straightening roller 30, a No. 5 straightening roller 50 and a No. 7 straightening roller 70 which are positioned on the lower row, the upper and lower positions of the No. 2 straightening roller 20, the No. 4 straightening roller 40 and the No. 6 straightening roller 60 are adjustable, the positions of the No. 1 straightening roller 10, the No. 3 straightening roller 30, the No. 5 straightening roller 50 and the No. 7 straightening roller 70 are fixed, and low-grade non-oriented silicon steel belts in raw materials move from the direction of the No. 1 straightening roller 10 to the direction of the No. 7 straightening roller 70. Firstly, calibrating zero roll gap positions of a No. 2 straightening roll 20, a No. 4 straightening roll 40 and a No. 6 straightening roll 60, and then determining the plate shape value of a low-grade non-oriented silicon steel strip in the raw material; the rolling reduction of the No. 2 straightening roller 20 relative to the zero roll gap position, the rolling reduction of the No. 4 straightening roller 40 at the zero roll gap position and the rolling reduction of the No. 6 straightening roller 60 at the zero roll gap position are determined according to the plate shape value of the low-grade and medium-grade non-oriented silicon steel strips in the raw material, and the No. 2 straightening roller 20, the No. 4 straightening roller 40 and the No. 6 straightening roller 60 are pressed down according to the rolling reduction of the No. 2 straightening roller 20, the rolling reduction of the No. 4 straightening roller 40 and the rolling reduction of the No. 6 straightening roller 60 to straighten the low-grade and medium-grade non-oriented silicon steel strips in the raw material. The method is butted with an upstream hot rolling raw material process, the straightening machine is adjusted according to the plate shape value of the low-grade non-oriented silicon steel strip in the raw material of the upstream process, seamless butting is guaranteed, the rolling reduction does not need to be tested repeatedly, and the straightening efficiency and the production efficiency of the low-grade non-oriented silicon steel strip in the raw material are high.
Specifically, the method of calibrating the zero roll gap positions of the No. 2 straightening roll 20, the No. 4 straightening roll 40, and the No. 6 straightening roll 60 is: the first steel wire 80 is placed and tensioned between the operating side of the No. 1 straightening roll 10 and the operating side of the No. 7 straightening roll 70, the second steel wire 90 is placed and tensioned between the driving side of the No. 1 straightening roll 10 and the driving side of the No. 7 straightening roll 70, the No. 2 straightening roll 20, the No. 4 straightening roll 40 and the No. 6 straightening roll 60 are respectively pressed down, if the operating side of the No. 2 straightening roll 20, the operating side of the No. 4 straightening roll 40 and the operating side of the No. 6 straightening roll 60 simultaneously contact the first steel wire 80, and the driving side of the No. 2 straightening roll 20, the driving side of the No. 4 straightening roll 40 and the driving side of the No. 6 straightening roll 60 simultaneously contact the second steel wire 90, the roll gap positions of the No. 2 straightening roll 20, the No. 4 straightening roll 40 and the No. 6 straightening roll 60 are marked as zero, if both the operating side and the driving side ends cannot simultaneously contact the first steel wire 80 and the second steel wire 90, the mechanical structure of the straightening roll needs to be adjusted, the operations were performed after the number 2 straightening roll 20, the number 4 straightening roll 40, and the number 6 straightening roll 60 were set to the horizontal direction.
If the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is not more than 15I, the rolling reduction of the No. 2 straightening roller 20 is-8 mm, namely the downward movement distance relative to the zero roll gap position is 8mm, similarly, the rolling reduction of the No. 4 straightening roller 40 is-4 mm, and the rolling reduction of the No. 6 straightening roller 60 is (the thickness of the low-grade non-oriented silicon steel strip in the raw material is-0.5) mm; if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is larger than 15I and not larger than 25I, the rolling reduction of the No. 2 straightening roller 20 is minus 10mm, the rolling reduction of the No. 4 straightening roller 40 is minus 5mm, and the rolling reduction of the No. 6 straightening roller 60 is (the thickness of the low-grade non-oriented silicon steel strip in the raw material is minus 0.5) mm; if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is more than 25I and not more than 40I, the rolling reduction of the No. 2 straightening roller 20 is-12 mm, the rolling reduction of the No. 4 straightening roller 40 is-6 mm, and the rolling reduction of the No. 6 straightening roller 60 is (the thickness of the low-grade non-oriented silicon steel strip in the raw material is-0.5) mm; if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is greater than 40I, the rolling reduction of the straightening roll 20 No. 2 is-15 mm, the rolling reduction of the straightening roll 40 No. 4 is-8 mm, and the rolling reduction of the straightening roll 60 No. 6 is (the thickness of the low-grade non-oriented silicon steel strip in the raw material is-0.5) mm, and the raw material steel plate is straightened according to the rolling reduction, so that the head and the tail of the welding material, namely the steel strip, are straight, and the straightening effect is good. In actual production, if the final straightening effect is to require the head of the steel plate to slightly tilt and the tail to be as flat as possible, the rolling reduction of the No. 6 straightening roll 60 of the head straightening machine can be 0.5 to 1mm smaller than the range.
Preferably, the diameter of first steel wire 80 is not more than 0.5mm, the diameter of second steel wire 90 is not more than 0.5mm, and the calibration with the position of the roll gap being zero is more accurate.
The technical scheme of the invention is explained by combining the attached drawings, the reduction of the No. 2 straightening roller, the reduction of the No. 4 straightening roller and the reduction of the No. 6 straightening roller are determined according to the plate shape value of the low-grade and medium-grade non-oriented silicon steel strip in the raw material, and the No. 2 straightening roller, the No. 4 straightening roller and the No. 6 straightening roller are pressed down according to the reduction of the No. 2 straightening roller, the reduction of the No. 4 straightening roller and the reduction of the No. 6 straightening roller so as to straighten the low-grade and medium-grade non-oriented silicon steel strip in the raw material. The method is butted with an upstream hot rolling raw material process, the straightening machine is adjusted according to the plate shape value of the low-grade non-oriented silicon steel strip in the raw material of the upstream process, seamless butting is guaranteed, the rolling reduction does not need to be tested repeatedly, and the straightening efficiency and the production efficiency of the low-grade non-oriented silicon steel strip in the raw material are high.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A method for straightening middle and low grade non-oriented silicon steel by a straight head machine, wherein the straight head machine comprises a No. 2 straightening roller, a No. 4 straightening roller and a No. 6 straightening roller which are positioned on the upper row, and a No. 1 straightening roller, a No. 3 straightening roller, a No. 5 straightening roller and a No. 7 straightening roller which are positioned on the lower row, the No. 1 straightening roller and the No. 7 straightening roller are respectively positioned at two ends, and the method for straightening the middle and low grade non-oriented silicon steel by the straight head machine comprises the following steps of:
calibrating zero roll gap positions of the No. 2 straightening roll, the No. 4 straightening roll and the No. 6 straightening roll;
determining the plate shape value of the low-grade non-oriented silicon steel strip in the raw material;
determining the rolling reduction of the No. 2 straightening roller, the rolling reduction of the No. 4 straightening roller and the rolling reduction of the No. 6 straightening roller according to the plate shape value of the low-grade non-oriented silicon steel strip in the raw material;
threading the low-grade and medium-grade non-oriented silicon steel strip in the raw material into the straight head machine, and straightening the low-grade and medium-grade non-oriented silicon steel strip in the raw material according to the pressing amount of the No. 2 straightening roller, the pressing amount of the No. 4 straightening roller and the pressing amount of the No. 6 straightening roller;
zero roll gap position of No. 2 leveling roller, No. 4 leveling roller and No. 6 leveling roller of calibration includes:
placing and tensioning a first steel wire between the operation side of the No. 1 straightening roller and the operation side of the No. 7 straightening roller, placing and tensioning a second steel wire between the transmission side of the No. 1 straightening roller and the transmission side of the No. 7 straightening roller, pressing down the No. 2 straightening roller, the No. 4 straightening roller and the No. 6 straightening roller respectively, and if the operation side of the No. 2 straightening roller, the operation side of the No. 4 straightening roller and the operation side of the No. 6 straightening roller simultaneously contact the first steel wire and the transmission side of the No. 2 straightening roller, the transmission side of the No. 4 straightening roller and the transmission side of the No. 6 straightening roller simultaneously contact the second steel wire, the No. 2 straightening roller, the No. 4 straightening roller and the No. 6 straightening roller are in a zero-roller seam position;
if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is not more than 15I, the rolling reduction of the No. 2 straightening roller is minus 8mm, the rolling reduction of the No. 4 straightening roller is minus 4mm, and the rolling reduction of the No. 6 straightening roller is minus 0.5mm of the thickness of the low-grade non-oriented silicon steel strip in the raw material;
if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is larger than 15I and not larger than 25I, the rolling reduction of the No. 2 straightening roller is minus 10mm, the rolling reduction of the No. 4 straightening roller is minus 5mm, and the rolling reduction of the No. 6 straightening roller is minus 0.5mm of the thickness of the low-grade non-oriented silicon steel strip in the raw material;
if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is greater than 25I and not greater than 40I, the rolling reduction of the No. 2 straightening roller is-12 mm, the rolling reduction of the No. 4 straightening roller is-6 mm, and the rolling reduction of the No. 6 straightening roller is-0.5 mm of the thickness of the low-grade non-oriented silicon steel strip in the raw material;
if the plate shape value of the low-grade non-oriented silicon steel strip in the raw material is greater than 40I, the rolling reduction of the No. 2 straightening roller is minus 15mm, the rolling reduction of the No. 4 straightening roller is minus 8mm, and the rolling reduction of the No. 6 straightening roller is minus 0.5mm of the thickness of the low-grade non-oriented silicon steel strip in the raw material.
2. The method for straightening medium and low grade non-oriented silicon steel by a straight head machine according to claim 1, wherein the diameter of the first steel wire is not more than 0.5mm, and the diameter of the second steel wire is not more than 0.5 mm.
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| DE10230449A1 (en) * | 2002-07-06 | 2004-01-15 | BFI VDEh-Institut für angewandte Forschung GmbH | Determining straightening roller position control parameter involves deriving shape function coefficients from flatness errors, deriving target coefficients, converting to position control parameters |
| DE102004041732A1 (en) * | 2004-08-28 | 2006-03-02 | Sms Demag Ag | Method of straightening a metal strip and straightening machine |
| CN102921771B (en) * | 2011-08-08 | 2014-12-24 | 宝山钢铁股份有限公司 | Method for setting roller gap of coarse straightening machine |
| CN102500658B (en) * | 2011-11-07 | 2014-11-12 | 秦皇岛首秦金属材料有限公司 | Hot straightening method for controlling shape of extra-thick plate |
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