CN114769311A - Novel method for improving yield of temper mill - Google Patents
Novel method for improving yield of temper mill Download PDFInfo
- Publication number
- CN114769311A CN114769311A CN202210462123.1A CN202210462123A CN114769311A CN 114769311 A CN114769311 A CN 114769311A CN 202210462123 A CN202210462123 A CN 202210462123A CN 114769311 A CN114769311 A CN 114769311A
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- China
- Prior art keywords
- steel
- uncoiler
- temper mill
- tension roller
- steel strip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention relates to the technical field of cold rolling of strip steel, in particular to a novel method for improving the yield of a temper mill set, wherein a steel coil is arranged on an uncoiler, one end of a drawn steel strip sequentially passes through an inlet tension roller set, a temper mill and an outlet tension roller set and is finally fixedly connected with a reel of the coiler; when the diameter of the steel coil on the uncoiler is smaller than 680mm, manually reducing the discharging speed of the steel strip of the uncoiler to 400 m/min in advance; when the steel belt is completely separated from the winding core of the uncoiler and the tail of the steel belt reaches the position of the inlet tension roller set, immediately manually stopping the uncoiler, and opening the roll gap of the temper mill to be more than 50 mm; and cutting the steel strip by using the slitting shear, and finally winding the rest steel strip by using a winding machine. According to the invention, the tail flicking speed is manually reduced in advance, and the steel belt is cut off when the tail part of the steel belt reaches the inlet tension roller set, so that the length of the waste steel belt is reduced, the product loss is favorably reduced, and the product yield is improved.
Description
Technical Field
The invention relates to the technical field of cold rolling of strip steel, in particular to a novel method for improving the yield of a temper mill.
Background
At present, the market competition of cold rolled products is intense, and the cost control is particularly important, wherein the cost reduction measures for reducing the product loss and improving the product yield are very necessary. Generally, when a leveling unit rolls to the tail of a steel coil strip, due to the reasons that the plate shape is poor after the annealing of an incoming steel coil core, a crown block clamp is damaged, the strip tail cannot be normally rolled due to tension loss and the like, a slitting shear is required to be used for shearing at an outlet, then the strip tail is reversely rewound to an uncoiler, and small coils are discharged to be treated as waste products. The inner diameter of a steel coil of incoming material produced by the planisher is generally 610mm, and in order to ensure normal drift, the drift diameter is set to 612mm, so that a normal defect-free steel strip with the length of more than 10 meters can be treated as a waste product, and unnecessary product loss is caused. In order to solve the problems and improve the unit yield, a new method for improving the unit yield of the leveling machine is provided to well solve the defects.
Disclosure of Invention
The invention aims to provide a new method for improving the yield of a temper mill, which is used for solving the problems in the background technology.
The invention is realized by the following technical scheme: a new method for improving the yield of a temper mill comprises the following steps:
s1: mounting the steel coil on an uncoiler, pulling one end of the steel strip out, sequentially passing through an inlet tension roller set, a temper mill, an outlet tension roller set, a slitting shear and finally fixedly connecting with a reel of the coiler;
s2: adjusting the tail-flicking diameter of a steel coil of the uncoiler from 612mm to 609mm, and setting the rolling speed of the temper mill to be not more than 25 m/min when the diameter of the steel coil is less than 630 mm;
s3: starting the uncoiler, the temper mill and the coiler, and rolling the steel coil by using the temper mill;
s4: when the diameter of the steel coil on the uncoiler is smaller than 680mm, manually reducing the steel strip discharging speed of the uncoiler to 400 m/min in advance;
s5: when the steel belt is completely separated from the winding core of the uncoiler and the tail of the steel belt reaches the position of the inlet tension roller set, immediately manually stopping the uncoiler, and opening the roll gap of the temper mill to be more than 50 mm;
s6: cutting off the steel strip by using a slitting shear, and finally winding the rest steel strip by using a winding machine;
preferably, between S4 and S5, the method further comprises the following steps:
s4-1: when the diameter of the steel coil on the uncoiler reaches 612mm, manually closing the uncoiler, the temper mill and the coiler, and carrying out quality inspection on the steel strip;
s4-2: if the quality inspection is qualified, setting the rolling speed of the temper mill to be 10 m/min, and then starting the temper mill, the uncoiler and the coiler again; if the quality inspection is unqualified, namely the tail part of the steel strip is found to be abnormal, the steel strip is cut off by utilizing the slitting shear, then the uncoiler is reversely started, and the unqualified steel strip is coiled on the uncoiler and treated as a waste product.
Preferably, the free end of the steel strip and the reel of the coiling machine are fixed by welding, and the number of welding points is not more than 6.
Preferably, a scrap winder is further arranged between the inlet tension roller group and the leveler, and after the step S6 is finished, the method further comprises the following steps:
s6-1: fixedly connecting one end of the steel belt between the slitting shear and the inlet tension roller group with a reel of the waste material winding machine;
s6-2: and starting the waste material winding machine, winding the residual waste material steel belt by using the waste material winding machine, and fixing the free end of the waste material steel belt on a scroll of the waste material winding machine.
Preferably, the steel belt and the reel of the scrap winder are fixedly connected by welding, and the number of welding spots is not more than 6.
Compared with the prior art, the invention provides a new method for improving the yield of the temper mill, which has the following beneficial effects:
1. according to the invention, the drift speed is manually reduced in advance, and the steel belt is cut off when the tail part of the steel belt reaches the inlet tension roller set, so that the length of the waste steel belt is reduced, the product loss is reduced, and the product yield is improved;
2. according to the invention, the waste material winding machine is arranged between the temper mill and the inlet tension roller set, so that a scrapped steel belt can be wound conveniently, and the waste material winding efficiency is improved.
Drawings
Fig. 1 is a layout diagram of the related equipment of the leveling machine set of the present invention.
In the figure: 1. an uncoiler; 2. an inlet tension roller set; 3. a waste winder; 4. a leveling machine; 5. an exit tension roller set; 6. cutting and shearing; 7. a coiling machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example (b): referring to fig. 1, a new method for increasing the yield of a leveler, the leveler in this embodiment specifically includes the following devices: the device comprises an uncoiler 1, an inlet tension roller group 2, a temper mill 4, an outlet tension roller group 5, a slitting shear 6 and a coiler 7.
The embodiment comprises the following steps in specific implementation:
s1: installing a steel coil on an uncoiler 1, sequentially passing one end of a drawn steel strip through an inlet tension roller set 2, a temper mill 4, an outlet tension roller set 5 and a slitting shear 6, and finally fixedly connecting with a reel of a coiler 7; it is worth mentioning that when the steel coil is installed on the uncoiler 1, the steel coil needs to be hoisted by using the crown block, and the hook head of the crown block needs to be kept to be centered on the core, so that the core is prevented from being uncoiled and the subsequent core penetrating is prevented from being influenced; in addition, the free end of the steel strip and a reel of a coiling machine 7 are fixed in a welding mode, and the number of welding points is not more than 6;
s2: adjusting the drift diameter of the steel coil of the uncoiler 1 from 612mm to 609mm, and setting the rolling speed of the temper mill 4 not to exceed 25 m/min when the diameter of the steel coil is smaller than 630 mm;
s3: starting the uncoiler 1, the temper mill 4 and the coiler 7, and rolling a steel coil by using the temper mill 4;
s4: when the diameter of the steel coil on the uncoiler 1 is smaller than 680mm, manually reducing the discharging speed of the steel strip of the uncoiler 1 to 400 m/min in advance;
s4-1: when the diameter of the steel coil on the uncoiler 1 reaches 612mm, manually closing the uncoiler 1, the temper mill 4 and the coiler 7, and carrying out quality inspection on the steel strip;
s4-2: if the quality inspection is qualified, setting the rolling speed of the temper mill 4 to be 10 m/min, and then starting the temper mill 4, the uncoiler 1 and the coiler 7 again; if the quality inspection is unqualified, namely the tail part of the steel strip is found to be abnormal, the steel strip is cut off by using the slitting shear 6, then the uncoiler 1 is reversely started, and the unqualified steel strip is coiled on the uncoiler 1 and treated as a waste product;
s5: on the premise that the quality inspection is qualified in S4-2, when the steel strip is completely separated from the winding core of the winding machine 1 and the tail of the steel strip reaches the position of the inlet tension roller set 2, immediately manually stopping the machine, and opening the roll gap of the temper mill 4 to be more than 50 mm;
s6: cutting the steel strip by using a slitting shear 6, and finally winding the rest steel strip by using a winding machine 7;
s6-1: a scrap winder 3 is arranged between the inlet tension roller group 2 and the leveler 4, and after S6 is finished, one end of the steel belt between the slitting shear 6 and the inlet tension roller group 2 is fixedly connected with a reel of the scrap winder 3;
s6-2: starting the waste material winding machine 3, winding the residual waste material steel belt by using the waste material winding machine 3, and fixing the free end of the waste material steel belt on a scroll of the waste material winding machine 3; it is worth mentioning that the connection mode of the steel belt and the scroll of the waste material winding machine 3 is welding fixation, and the number of welding spots is not more than 6.
By adopting the existing rolling technology, the drift length of each coil of the leveling unit is about 16 meters under the normal condition; by adopting the rolling technology of the embodiment, the part of the steel strip which is not flat can be controlled within 4 meters, namely, the loss of 12 meters can be reduced per coil of the steel strip on average. According to the specification of the steel coil of 1.0 multiplied by 1250mm, the weight is 20 tons, and the length is 2000 meters, the yield of each coil can be increased by 12/2000= 0.6%.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A new method for improving the yield of a temper mill is characterized in that: the method comprises the following steps:
s1: installing a steel coil on an uncoiler, and pulling one end of the steel coil out to sequentially pass through an inlet tension roller set, a leveler, an outlet tension roller set and a slitting shear and finally fixedly connecting with a reel of the coiler;
s2: adjusting the tail-flicking diameter of a steel coil of the uncoiler from 612mm to 609mm, and setting the rolling speed of the temper mill to be not more than 25 m/min when the diameter of the steel coil is less than 630 mm;
s3: starting the uncoiler, the temper mill and the coiler, and rolling a steel coil by using the temper mill;
s4: when the diameter of the steel coil on the uncoiler is smaller than 680mm, manually reducing the steel strip discharging speed of the uncoiler to 400 m/min in advance;
s5: when the steel belt is completely separated from the winding core of the uncoiler and the tail of the steel belt reaches the position of the inlet tension roller set, the machine is immediately and manually stopped, and the roll gap of the temper mill is opened to be more than 50 mm;
s6: and cutting the steel strip by using the slitting shear, and finally winding the rest steel strip by using a winding machine.
2. The method of claim 1 wherein the method further comprises the steps of: between S4 and S5, the following steps are further included:
s4-1: when the diameter of the steel coil on the uncoiler reaches 612mm, manually closing the uncoiler, the temper mill and the coiler, and carrying out quality inspection on the steel strip;
s4-2: if the quality inspection is qualified, setting the rolling speed of the temper mill to be 10 m/min, and then starting the temper mill, the uncoiler and the coiler again; if the quality inspection is unqualified, namely the tail part of the steel strip is found to be abnormal, the steel strip is cut off by utilizing the slitting shear, then the uncoiler is reversely started, and the unqualified steel strip is coiled on the uncoiler and treated as a waste product.
3. The method of claim 1 wherein the method further comprises the steps of: the free end of the steel strip is fixed with the reel of the coiling machine in a welding mode, and the number of welding spots is not more than 6.
4. The method of claim 1 wherein the method further comprises the steps of: a waste material winding machine is further arranged between the inlet tension roller group and the temper mill, and after S6 is finished, the method further comprises the following steps:
s6-1: fixedly connecting one end of the steel belt between the slitting shear and the inlet tension roller group with a reel of the waste material winding machine;
s6-2: and starting the waste material winding machine, winding the residual waste material steel belt by using the waste material winding machine, and fixing the free end of the waste material steel belt on a scroll of the waste material winding machine.
5. The method of claim 4, wherein the step of: the steel band with the connected mode of garbage rolling machine spool is welded fastening, and the solder joint is no more than 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210462123.1A CN114769311A (en) | 2022-04-29 | 2022-04-29 | Novel method for improving yield of temper mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210462123.1A CN114769311A (en) | 2022-04-29 | 2022-04-29 | Novel method for improving yield of temper mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114769311A true CN114769311A (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210462123.1A Pending CN114769311A (en) | 2022-04-29 | 2022-04-29 | Novel method for improving yield of temper mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114769311A (en) |
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2022
- 2022-04-29 CN CN202210462123.1A patent/CN114769311A/en active Pending
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