CN114147075A - Method for rolling wire rod product by using 150 and 160 square blanks together - Google Patents

Method for rolling wire rod product by using 150 and 160 square blanks together Download PDF

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Publication number
CN114147075A
CN114147075A CN202110444585.6A CN202110444585A CN114147075A CN 114147075 A CN114147075 A CN 114147075A CN 202110444585 A CN202110444585 A CN 202110444585A CN 114147075 A CN114147075 A CN 114147075A
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rolling
mill
guide
phi
rolling mill
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刘杰
朱艳红
李文举
曹云
杨章令
陈爱林
舒云胜
王东宇
冯再武
张付锦
张广丹
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Honghe Iron & Steel Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
    • B21B39/165—Guides or guide rollers for rods, bars, rounds, tubes ; Aligning guides
    • 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
    • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like

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Abstract

The invention relates to a method for rolling a wire rod product by using 150 and 160 square blanks together, belonging to the technical field of steel rolling. The invention sets the 1# rough rolling mill-5 # rough rolling mill as flat-roll slotless rolling, and the 6# rough rolling mill as circular-hole rolling; the slide guide of the 1# -6 # roughing mill is set as an adjustable opening guide, and the guide rollers of the 4#, 6# inlet guides are set as flat rollers, and then rolling is performed. The invention realizes the sharing of smooth steel bars and ribbed steel bars with wire rod phi 6-phi 12 specifications by 150 and 160 square blanks under the condition that the prior process is maintained by a roughing mill pass system and a guide size optimization design, a medium rolling mill, a pre-finish rolling mill and a finishing mill, effectively reduces the spare amount of process spare parts and the time for exchanging rollers and adjusting the mill when the square blanks are changed, and is easy to popularize and apply.

Description

Method for rolling wire rod product by using 150 and 160 square blanks together
Technical Field
The invention belongs to the technical field of steel rolling, and particularly relates to a method for rolling a wire rod product by sharing 150 and 160 square blanks.
Background
The high-speed red steel wire rolling mill group consists of 28 rolling mills and is divided into a rough rolling unit, a medium rolling unit, a pre-finish rolling unit and a finishing rolling unit. The steel billet after being discharged is conveyed to a first rolling mill of a roughing mill group by a conveying roller way, the rolled piece is subjected to twist-free rolling in the roughing mill group with 6 frames of horizontal and vertical alternative arrangement, the head of the rolled piece is cut off by a No. 1 flying shear (the rolled piece can also be broken in case of an accident), and then the rolled piece enters an intermediate mill group (phi 450 x 4+ phi 350 x 2) with 6 frames of horizontal and vertical alternative arrangement for twist-free rolling. The interior of the roughing mill group and the intermediate mill group is rolled by adopting micro-tension control, the head and the tail of a rolled piece are cut off by a No. 2 flying shear, the rolled piece enters a pre-finishing mill group (phi 350 multiplied by 2+ phi 285 multiplied by 4) for rolling, the pre-finishing mill group consists of two frame mills and four tungsten carbide roll collar cantilever mills which are arranged in a horizontal-vertical alternating mode, and a pneumatic vertical loop and a horizontal loop are arranged between mill frames of the pre-finishing mill group, so that the rolled piece is rolled in a non-torsion and non-tension mode in the area, the rolled piece entering the finishing mill group is ensured to be accurate in size, and the specification of a steel product of the rolled piece is a plain round steel bar and a ribbed steel bar with the specification of phi 6-phi 12.
In the conventional rolling method, because the number 1-2 of the roughing mill is a box pass, the reduction is not easy to adjust greatly, when the specification of a square blank is changed, the rolling is realized only by replacing the roller and spare parts such as an inlet guide, an outlet guide and the like of the roller at the same time, and because the roller and the guide and the guard are more in series, the spare amount of process equipment is increased indirectly, and a large amount of inventory fund is occupied; in order to meet the production and operation requirements, 150 and 160 square blanks are required to be rolled together for wires, but the specifications of the rolled blanks are changed, the number of guides and guards for changing a frame and for an inlet and an outlet is large, and a large amount of time is wasted; the workload of roll processing, guide assembly, process adjustment and the like is large, and the labor cost and the financial cost are wasted; the roller changing is frequent, the process accidents such as slipping and the like easily occur due to too much proof marks, waste products such as size out-of-tolerance and the like are caused, and the performance of the production energy is generally restricted.
Therefore, in the rolling production process, in order to ensure continuous and stable rolling production, the specification change of the rolled square billets needs to be overcome, the 150 and 160 square billets share the rolling process, and the use of spare parts of the rolling mill, the roll replacement of the rolling mill and the adjustment time of the rolling mill are further reduced.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a method for rolling a wire rod product by sharing 150 and 160 square billets. The invention realizes the sharing of smooth steel bars and ribbed steel bars with wire rod phi 6-phi 12 specifications by 150 and 160 square blanks under the condition that the prior process is maintained by a roughing mill pass system, a guide size optimization design, a medium rolling mill, a pre-finish rolling mill and a finishing mill, thereby effectively reducing the spare amount of process spare parts and the time for exchanging rollers and adjusting the rolling mill when the square blanks are changed.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method of co-rolling a wire product from 150 and 160 billets comprising:
step (1), setting a 1# rough rolling mill and a 5# rough rolling mill into flat-roll slotless rolling, and setting a 6# rough rolling mill into circular-hole rolling;
wherein, the 1# to 6# rough rolling mill frame is provided with rollers:
in the formula, DWorker's tool+HMaterial≤Dmax；DWorker's toolThe diameter of the working roll; hMaterialIs the material type height; dmaxAllowing the maximum roll diameter for the rolling mill;
step (2), the sliding guide of the 1# to 6# rough rolling mill is set to be an adjustable opening type guide, and the guide rollers of the 4# and 6# inlet guides are set to be flat roller shapes;
the size of the sliding guide and guard guide groove of the 1# to 6# rough rolling mill is as follows:
height H of guide grooveGuide tube＝HMaterial+8K；
Width B of guide grooveGuide tube＝BMaterial+10K；
Wherein K is the guide slot clearance coefficient, BMaterialIs the material type width;
step (3), rolling: the control range of the initial rolling temperature is 1000-1060 ℃, and the set ranges of the outlet speeds of finishing mills with the specifications of phi 6, phi 8, phi 10 and phi 12 are 78-81 m/s, 75-79 m/s, 49-53 m/s and 35-38 m/s in sequence.
In the invention, after the rolling outlet linear speed of each frame of the rough rolling mill is set according to the outlet speed of a finishing mill with four rolling specifications of phi 6, phi 8, phi 10 and phi 12 and the coefficient value of extension is input, the linear speed is automatically output by an automatic control program of the rolling mill; the automatic control program of the rolling mill is a program used in the existing production, and the invention does not improve the automatic control program.
Further, it is preferable that the number 1 roughing mill-5 roughing mill K is 1 to 3.5, and the number 6 roughing mill K is 0.2 to 2.0.
Further, when rolling is performed using a 150mm × 150mm square billet, the dimensions of the shapes of the work pieces in the 6-stand rolling mill in the order of rolling are preferably 112.00mm × 161.00mm, 115.00mm × 120.00mm, 75.00mm × 142.00mm, 85.00mm × 92.00mm, 55.00mm × 108.00mm, and 75.50mm × 74.50 mm.
Further, it is preferable that the elongation coefficients are 1.23, 1.31, 1.34, 1.32, 1.35, and 1.33 in this order of rolling.
Further, when rolling is performed using a 160mm × 160mm square billet, the dimensions of the shapes of the work pieces in the 6-stand rolling mill in the order of rolling are preferably 117.00mm × 171.00mm, 117.00mm × 130.00mm, 77.00mm × 137.00mm, 85.00mm × 92.00mm, 55.00mm × 108.00mm, and 75.50mm × 74.50 mm.
Further, it is preferable that the elongation coefficients are 1.31, 1.45, 1.31, 1.30, 1.35, and 1.33 in this order of rolling.
Further, it is preferable that the roll diameter D of the 1# to 6# roughing millWorker's toolThe size ranges are as follows: [515mm, 465 mm)]、[515mm，465mm]、[515mm，465mm]、[470mm，415mm]、 [510mm，415mm]、[495mm，430mm]。
Further, it is preferable that the inlet guide of the 1# to 6# roughing mill has a height of 170mm, 120mm, 140mm, 80mm, 100mm, 58mm in this order, a width of 170mm, 185mm, 140mm, 160mm, 110mm, 120mm in this order, and an opening of 160mm, 120mm, 130mm, 80mm, 100mm, 60mm in this order.
Further, it is preferable that the outlet guide of the 1# to 6# roughing mill has a height of 130mm, 140mm, 100mm, 105mm, 75mm, 85mm in this order, and a width of 180mm, 140mm, 160mm, 105mm, 125mm, 85mm in this order.
The invention uses a flat roller slotless rolling for a 1-5# roughing mill and a round hole rolling (slotless-round) for a 6# rolling mill to replace the prior hole pattern system, and the prior systems are a box-shaped hole for the 1-2# roughing mill, an elliptical hole for the 3# roughing mill, an elliptical hole for the 5# roughing mill and a round hole (box-elliptical-round) for the 4# roughing mill and the 6# roughing mill; the invention further realizes the purpose of realizing the shared rolling production by directly adjusting the rolling mill draft of 150 and 160 square blanks, and does not need to adjust rollers and replace inlet and outlet guide spare parts when the specification of the rolled square blanks is changed.
The invention designs a rough rolling pass system into a new series by utilizing the characteristic that the slotless rolling has larger extension (the extension coefficient is 1.01-1.08 times larger than that of pass rolling) and changing the extension coefficient (namely changing the size of a material type), thereby realizing the sharing of 150 and 160 square blank rolling passes.
And optimally designing the parameters of the roller. The design meets the requirements of the following formula:
the number of the rollers of the 1# to 6# rough rolling mill frame is DWorker's tool(diameter of work roll) + HMaterial(material type height) is less than or equal to DmaxWherein:
Dworker's tool——The diameter of a working roll;
Hmaterial-material profile height;
Dmaxthe rolling mill allows the maximum roll diameter.
The sliding guide and guard guide groove sizes of the non-groove pass rolling mill and the round pass rolling mill are as follows:
height H of guide grooveGuide tube＝HMaterial+8K mm；
Width B of guide grooveGuide tube＝BMaterial+10K mm；
HMaterial-material profile height;
k is the clearance coefficient of the guide groove, the non-groove is 1 to 3.5, and the pass rolling is 0.2 to 2.0;
Bmaterial-material form width.
The invention designs the sizes of the inlet guide and the outlet guide uniformly, and realizes the sharing of the 150 and 160 square billet rolling guides. The rolling guide is set to be an adjustable opening type guide, and guide rollers of the No. 4 and No. 6 inlet guides are set to be flat roller shapes from the original guide rollers with circular arcs; the sliding guide is designed to be common to 150 and 160 square blanks, so that the guide is not required to be replaced when the square blanks are replaced. According to the material shape of each specification, according to HMaterial(Material height) +8Kmm BMaterialThe material width is plus 10Kmm, the K value (0.2-3.5) is determined according to the shape and the height-width ratio of the material, the adjustment of the size of the guide and the opening degree of the sliding guide of the rolling mill is determined, and the equipment sharing of 150 and 160 square billet rolling is finally realized.
The prior method and the method of the invention are shown in the table 1 and the table 2 for the parameter table of the rough rolling process.
TABLE 1 Rough rolling original pass system 150mm x 150mm square billet rolling parameter table
Figure BDA0003036305030000041
TABLE 2 table of rolling parameters shared by rough rolling 150 and 160 square billets in accordance with the present invention
Figure BDA0003036305030000042
Figure BDA0003036305030000051
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has simple principle and convenient implementation, combines the blank supply and the original hole pattern system, redesigns the hole pattern system and the guide size of the roughing mill, realizes the sharing of smooth steel bars and ribbed steel bars with the specification of wire phi 6-phi 12 by 150 and 160 square blanks under the condition that the intermediate rolling, the pre-finish rolling and the finishing mill keep the original process, thereby effectively reducing the spare amount of process spare parts and the time for exchanging rollers and adjusting the rolling mill when changing the square blanks, reduces the spare amount of the roughing process by about 50 percent through measurement and calculation, reduces the time for exchanging rollers by about 80 hours, creates about 260 ten thousand yuan of profit annually, and has better production and application effects and popularization and application values.
2. The 1-5# roller of the roughing mill is changed from a groove to a flat roller for use, the application of a non-pass rolling technology is realized, the service life of the roller is prolonged by 3-4 times, the power consumption is reduced by about 3%, and the economic benefit and the social benefit are obviously improved.
3. The invention effectively solves the rolling production problem caused by the inconsistent specification of the rolling blank, effectively saves the guide spare parts at the inlet and the outlet of the rolling mill, reduces the turning amount of the roller processing and reduces the cost of manpower and financial resources.
4. The operation is greatly simplified, various process accidents are reduced, and the comprehensive yield of the wire rod is effectively improved to 98.25%.
Drawings
FIG. 1 is a schematic diagram of a pass system used in rough rolling;
FIG. 2 is a schematic diagram of the hole pattern system used after the design of the present invention;
FIG. 3 is a schematic view of an original design of an inlet rolling guide roller;
FIG. 4 is a schematic view of the design of the inlet rolling guide roller of the present invention;
fig. 5 is a schematic view of the roughing mill outlet.
In the figure: 1 represents a guide and guard guide roller with an arc, 2 represents a guide and guard guide roller without an arc, and 3 represents a wear-resistant gasket with adjustable height.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
1. As shown in fig. 1 and 2, the pass system of the prior roughing mill uses a box-ellipse-round hole, the redesigned pass system 1-5# uses slotless rolling, and 6# uses a round hole, so that the characteristic of large elongation (the elongation coefficient is 1.01-1.08 times larger than that of pass rolling) of slotless rolling is utilized, and the roughing pass system is designed into a new series by changing the elongation coefficient (namely changing the size of a material type), thereby realizing the sharing of 150 and 160 square blank rolling passes.
2. The sizes of the inlet guide and the outlet guide are designed uniformly, and the 150 and 160 square billet rolling guide and the guide are shared. Wherein the inlet rolling guide is set as an adjustable opening type guide, and the guide rollers of the 4# and 6# inlet guide are set as flat rollers 2 from the original 1 with circular arcs (see the detailed figures 3 and 4); the size of the outlet sliding guide is designed to be 150 and 160 square blanks to roll the guide 3 with the height of the adjustable wear-resistant gasket, so that the guide needs to be replaced when the square blanks are replaced.
The method comprises the following specific implementation steps:
1. the 1-5# rolling mill uses flat roll slotless rolling, the 6# rolling mill uses round hole rolling (slotless-round), replacing the previous pass system, the 1-2# rolling mill uses box-shaped holes, the 3# rolling mill uses elliptical holes, the 4# rolling mill uses round holes (box-elliptical-round).
2. The sizes of the inlet guide and the outlet guide are designed uniformly, and the 150 and 160 square billet rolling guide and the guide are shared. Wherein the inlet rolling guide is set as an adjustable opening type guide, and the guide rollers of the 4# and 6# inlet guide are set as flat rollers 2 from the original 1 with circular arcs (see the detailed figures 3 and 4); the size of the outlet sliding guide is designed to be 150 and 160 square billets rolled, so that the guide 3 can be shared, and the guide needs to be replaced when the square billets are replaced.
3. In the rolling process, the opening degree of the inlet guide of the rolling mill is finely adjusted according to the size condition of a rolled piece, and the height of the outlet guide wear-resistant gasket is properly adjusted to achieve the most suitable and stable rolling operation.
The operation is carried out in the actual production process by referring to fig. 1 to 5 and the specific implementation steps thereof. The invention realizes the sharing of smooth steel bars and ribbed steel bars with wire rod phi 6-phi 12 specifications by 150 and 160 square blanks mainly through the optimization design of a rough mill pass system and a guide size, and under the condition that a medium rolling mill, a pre-finish rolling mill and a finishing mill keep the original process, thereby effectively reducing the spare amount of process spare parts and the time for exchanging rollers and adjusting the mill when the square blanks are changed, and having better production and application effects and popularization and application values.
Example 1
A method of co-rolling a wire product from 150 and 160 billets comprising:
step (1), setting a 1# rough rolling mill and a 5# rough rolling mill into flat-roll slotless rolling, and setting a 6# rough rolling mill into circular-hole rolling;
wherein, the 1# to 6# rough rolling mill frame is provided with rollers:
in the formula, DWorker's tool+HMaterial≤Dmax；DWorker's toolThe diameter of the working roll; hMaterialIs the material type height; dmaxAllowing the maximum roll diameter for the rolling mill;
step (2), the sliding guide of the 1# to 6# rough rolling mill is set to be an adjustable opening type guide, and the guide rollers of the 4# and 6# inlet guides are set to be flat roller shapes;
the size of the sliding guide and guard guide groove of the 1# to 6# rough rolling mill is as follows:
height H of guide grooveGuide tube＝HMaterial+8K；
Width B of guide grooveGuide tube＝BMaterial+10K；
Wherein K is the guide slot clearance coefficient, BMaterialIs the material type width;
step (3), rolling: the control range of the initial rolling temperature is 1000-1060 ℃, and the set ranges of the outlet speeds of finishing mills with the specifications of phi 6, phi 8, phi 10 and phi 12 are 78-81 m/s, 75-79 m/s, 49-53 m/s and 35-38 m/s in sequence.
Example 2
A method of co-rolling a wire product from 150 and 160 billets comprising:
step (1), setting a 1# rough rolling mill and a 5# rough rolling mill into flat-roll slotless rolling, and setting a 6# rough rolling mill into circular-hole rolling;
wherein, the 1# to 6# rough rolling mill frame is provided with rollers:
in the formula, DWorker's tool+HMaterial≤Dmax；DWorker's toolThe diameter of the working roll; hMaterialIs the material type height; dmaxAllowing the maximum roll diameter for the rolling mill;
step (2), the sliding guide of the 1# to 6# rough rolling mill is set to be an adjustable opening type guide, and the guide rollers of the 4# and 6# inlet guides are set to be flat roller shapes;
the size of the sliding guide and guard guide groove of the 1# to 6# rough rolling mill is as follows:
height H of guide grooveGuide tube＝HMaterial+8K；
Width B of guide grooveGuide tube＝BMaterial+10K；
Wherein K is the guide slot clearance coefficient, BMaterialIs the material type width;
step (3), rolling: the control range of the initial rolling temperature is 1000-1060 ℃, and the set ranges of the outlet speeds of finishing mills with the specifications of phi 6, phi 8, phi 10 and phi 12 are 78-81 m/s, 75-79 m/s, 49-53 m/s and 35-38 m/s in sequence.
The number 1 rough rolling mill-5 rough rolling mill K is 1-3.5, and the number 6 rough rolling mill K is 0.2-2.0.
When a 150mm × 150mm square billet is rolled, the shapes and sizes of the process materials of a 6-stand rolling mill are 112.00mm × 161.00mm, 115.00mm × 120.00mm, 75.00mm × 142.00mm, 85.00mm × 92.00mm, 55.00mm × 108.00mm and 75.50mm × 74.50mm in sequence according to the rolling sequence.
The elongation coefficients are 1.23, 1.31, 1.34, 1.32, 1.35 and 1.33 in sequence according to the rolling sequence.
Example 3
A method of co-rolling a wire product from 150 and 160 billets comprising:
step (1), setting a 1# rough rolling mill and a 5# rough rolling mill into flat-roll slotless rolling, and setting a 6# rough rolling mill into circular-hole rolling;
wherein, the 1# to 6# rough rolling mill frame is provided with rollers:
in the formula, DWorker's tool+HMaterial≤Dmax；DWorker's toolThe diameter of the working roll; hMaterialIs the material type height; dmaxAllowing the maximum roll diameter for the rolling mill;
step (2), the sliding guide of the 1# to 6# rough rolling mill is set to be an adjustable opening type guide, and the guide rollers of the 4# and 6# inlet guides are set to be flat roller shapes;
the size of the sliding guide and guard guide groove of the 1# to 6# rough rolling mill is as follows:
height H of guide grooveGuide tube＝HMaterial+8K；
Width B of guide grooveGuide tube＝BMaterial+10K；
Wherein K is the guide slot clearance coefficient, BMaterialIs the material type width;
step (3), rolling: the control range of the initial rolling temperature is 1000-1060 ℃, and the set ranges of the outlet speeds of finishing mills with the specifications of phi 6, phi 8, phi 10 and phi 12 are 78-81 m/s, 75-79 m/s, 49-53 m/s and 35-38 m/s in sequence.
The number 1 rough rolling mill-5 rough rolling mill K is 1-3.5, and the number 6 rough rolling mill K is 0.2-2.0.
When a square billet of 160mm × 160mm is rolled, the shapes and sizes of the process materials of 6 rolling mills are 117.00mm × 171.00mm, 117.00mm × 130.00mm, 77.00mm × 137.00mm, 85.00mm × 92.00mm, 55.00mm × 108.00mm and 75.50mm × 74.50mm in sequence.
The elongation coefficients are 1.31, 1.45, 1.31, 1.30, 1.35 and 1.33 in sequence according to the rolling sequence.
Example 4
A method of co-rolling a wire product from 150 and 160 billets comprising:
step (1), setting a 1# rough rolling mill and a 5# rough rolling mill into flat-roll slotless rolling, and setting a 6# rough rolling mill into circular-hole rolling;
wherein, the 1# to 6# rough rolling mill frame is provided with rollers:
in the formula, DWorker's tool+HMaterial≤Dmax；DWorker's toolThe diameter of the working roll; hMaterialIs the material type height; dmaxAllowing the maximum roll diameter for the rolling mill;
step (2), the sliding guide of the 1# to 6# rough rolling mill is set to be an adjustable opening type guide, and the guide rollers of the 4# and 6# inlet guides are set to be flat roller shapes;
the size of the sliding guide and guard guide groove of the 1# to 6# rough rolling mill is as follows:
height H of guide grooveGuide tube＝HMaterial+8K；
Width B of guide grooveGuide tube＝BMaterial+10K；
Wherein K is the guide slot clearance coefficient, BMaterialIs the material type width;
step (3), rolling: the control range of the initial rolling temperature is 1000-1060 ℃, and the set ranges of the outlet speeds of finishing mills with the specifications of phi 6, phi 8, phi 10 and phi 12 are 78-81 m/s, 75-79 m/s, 49-53 m/s and 35-38 m/s in sequence.
The number 1 rough rolling mill-5 rough rolling mill K is 1-3.5, and the number 6 rough rolling mill K is 0.2-2.0.
Roll diameter D of 1# to 6# rough rolling millWorker's toolThe size ranges are as follows: [515mm, 465 mm)]、[51 5mm，465mm]、[515mm，465mm]、[470mm，415mm]、[510mm，415mm]、[495mm，430mm]。
The inlet guide and guard sizes of the 1# to 6# rough rolling mill are 170mm, 120mm, 140mm, 80mm, 100mm and 58mm in sequence, the widths are 170mm, 185mm, 140mm, 160mm, 110m m and 120mm in sequence, and the openings are 160mm, 120mm, 130mm, 80mm, 100mm and 60mm in sequence.
The outlet guide of the 1# to 6# rough rolling mill has the height of 130mm, 140mm, 100mm, 105mm, 75mm and 85mm in sequence, and the width of 180mm, 140mm, 160mm, 105mm, 125m m and 85mm in sequence.
Examples of the applications
The wire shop rolling mill set of the Honghe Steel Co Ltd comprises 28 rolling mills, and is divided into a rough rolling set, a medium rolling set, a pre-finish rolling set and a finishing rolling set. The steel billet after being discharged out of the furnace is conveyed to a first rolling mill of a roughing mill group by a conveying roller way, rolled pieces are subjected to non-twist rolling in the roughing mill group with 6 frames arranged horizontally and vertically alternately, a roughing pass system is a box-shaped-oval-round hole, the supplied blank specification is 150mm multiplied by 150mm square billet and 160mm multiplied by 160mm square billet, the finish rolling finished product specification is plain round steel bar and ribbed steel bar with the specification of phi 6-phi 12, and the prior art has the following problems:
1) because of the influence of different specifications of blanks for blanks, the process hole patterns and guide and guard series are various, the spare amount of production process equipment is large, and a large amount of inventory funds are occupied;
2) when the specification of the blank is changed, the roll pass is not matched and needs to be changed again, a large amount of time is wasted when the roll is changed, the turning amount of roll processing is increased, and the labor cost and the financial cost are wasted;
3) frequent roll replacement easily causes process accidents such as sample correction and steel piling and waste product amount caused by excessive size.
In light of the above existing problems, the following measures are taken:
1) hole type sharing: the original rough rolling mill pass system uses a box-ellipse-round hole, the redesigned pass system 1-5# uses slotless rolling and 6# uses a round hole, so that the characteristic of large extension (the extension coefficient is 1.01-1.08 times larger than that of pass rolling) of slotless rolling is utilized, and the rough rolling pass system is designed into a new series through the change of the extension coefficient (namely, the size of a material type is changed), thereby realizing the sharing of 150 and 160 square blank rolling passes; 2) sharing the roller: application of the blanks according to their push-down distributionWorker's tool(diameter of work roll) + HMaterial(material type height) is less than or equal to DmaxThe principle of (the maximum allowable diameter of the rolling mill) is that the 1# to 6# rolling mills share the roll distribution and meet the operation requirement of equipment; 3) the guide and guard are shared: according to the size of the material type, the sizes of the inlet guide and the outlet guide are designed uniformly, and the 150 and 160 square blank rolling guides are shared. The inlet rolling guide is set to be an adjustable opening type guide, and guide rollers of the 4# and 6# inlet guides are set to be flat rollers from original guide rollers with circular arcs; the outlet sliding guide is designed to be 150 and 160 square billets rolledThe guide with the height of the adjustable wear-resistant gasket is shared, the guide is prevented from being replaced when square blanks are replaced, and the 150 and 160 square blanks are rolled in a shared mode. The detailed parameters are shown in tables 1 and 2.
Through the above measures, the following effects are obtained:
1) the 1-5# roller of the roughing mill is changed from a groove to a flat roller for use, the application of a non-pass rolling technology is realized, the service life of the roller is prolonged by 3-4 times, the power consumption is reduced by about 3%, and the economic benefit and the social benefit are obviously improved;
2) the spare amount of process spare parts and the time for exchanging rollers and adjusting a rolling mill when square billets are changed are greatly reduced, the using amount of rough rolling process spare parts is reduced by about 50 percent, the roller exchanging time is reduced by about 80 hours every year, and the profit is about 260 ten thousand yuan each year;
3) the rolling production problem caused by the inconsistent specification of the rolled blank is effectively solved, the guide spare parts at the inlet and the outlet of the rolling mill are effectively saved, the turning amount of the roller is reduced, and the labor and financial cost is reduced.
4) The operation is greatly simplified, various technological accidents of rough rolling are reduced, and the comprehensive yield of the wire rod is effectively improved to 98.25% in 2020.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A method of co-rolling a wire product from 150 and 160 billets comprising:
step (1), setting a 1# rough rolling mill and a 5# rough rolling mill into flat-roll slotless rolling, and setting a 6# rough rolling mill into circular-hole rolling;
wherein, 1# -6 # roughing mill stand roll arrangement:
in the formula, DWorker's tool+HMaterial≤Dmax；DWorker's toolThe diameter of the working roll; hMaterialIs the material type height; dmaxAllowing the maximum roll diameter for the rolling mill;
step (2), the sliding guide of the 1# -6 # roughing mill is set as an adjustable opening guide, and the guide rollers of the 4#, 6# inlet guides are set as flat rollers;
the size of the sliding guide and guard guide slot of the 1# -6 # roughing mill is:
height H of guide grooveGuide tube=HMaterial+8K；
Width B of guide grooveGuide tube=BMaterial+10K；
Wherein K is the guide slot clearance coefficient, BMaterialIs the material type width;
step (3), rolling: the control range of the initial rolling temperature is 1000-1060 ℃, and the set ranges of the outlet speeds of finishing mills with the specifications of phi 6, phi 8, phi 10 and phi 12 are 78-81 m/s, 75-79 m/s, 49-53 m/s and 35-38 m/s in sequence.
2. The method for rolling a wire rod product shared by 150 and 160 square billets as claimed in claim 1, wherein 1 to 3.5 is taken for a 1# roughing mill-5 # roughing mill K, and 0.2 to 2.0 is taken for a 6# roughing mill K.
3. A method of rolling a wire rod product shared by 150 and 160 square billets as claimed in claim 1, wherein when 150mm x 150mm square billets are used for rolling, the process shapes of 6 stands of rolling mill in the rolling order are 112.00mm x 161.00mm, 115.00mm x 120.00mm, 75.00mm x 142.00mm, 85.00mm x 92.00mm, 55.00mm x 108.00mm, 75.50mm x 74.50 mm.
4. A method of rolling a wire product common to 150 and 160 square billets as claimed in claim 3, wherein the elongation coefficients are 1.23, 1.31, 1.34, 1.32, 1.35, 1.33 in the order of rolling.
5. A method of rolling a wire rod product shared by 150 and 160 square billets as claimed in claim 1, wherein when 160mm x 160mm square billets are used for rolling, the dimensions of the shapes of the process billets of 6 stands of rolling mill are 117.00mm x 171.00mm, 117.00mm x 130.00mm, 77.00mm x 137.00mm, 85.00mm x 92.00mm, 55.00mm x 108.00mm and 75.50mm x 74.50mm in sequence according to the rolling sequence.
6. The method of rolling a wire product shared by 150 and 160 square billets as claimed in claim 5, wherein the elongation coefficients are 1.31, 1.45, 1.31, 1.30, 1.35, 1.33 in sequence according to the rolling order.
7. The method of rolling a wire product shared by 150 and 160 square billets as claimed in claim 1, wherein the roll diameter D of the 1-6-roughing mill is DWorker's toolThe size ranges are as follows: [515mm, 465 mm)]、[515 mm，465 mm]、[515 mm，465 mm]、[470 mm，415 mm]、[510 mm，415 mm]、[495 mm，430 mm]。
8. A method of co-rolling a wire product from 150 and 160 square billets as claimed in claim 1, wherein the inlet guide dimensions of the 1# -6 # roughing mill are 170mm, 120mm, 140mm, 80mm, 100mm, 58mm in height order, 170mm, 185mm, 140mm, 160mm, 110mm, 120mm in width order, and the opening is 160mm, 120mm, 130mm, 80mm, 100mm, 60mm in width order.
9. A method of rolling a wire product common to 150 and 160 square billets as claimed in claim 1, wherein the outlet guide size of the 1-6 # roughing mill is 130mm, 140mm, 100mm, 105mm, 75mm, 85mm in height and 180mm, 140mm, 160mm, 105mm, 125mm, 85mm in width.
CN202110444585.6A 2021-04-23 2021-04-23 Method for rolling wire rod product by using 150 and 160 square blanks together Pending CN114147075A (en)

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Publication number Priority date Publication date Assignee Title
US4685320A (en) * 1981-08-05 1987-08-11 Kawasaki Steel Corporation Method of rolling steel rods and wires with grooveless rolls and grooveless rolling entry guide
CN201889316U (en) * 2010-02-24 2011-07-06 武汉钢铁(集团)公司 Rolled steel production line
CN104043647A (en) * 2013-11-13 2014-09-17 山东西王特钢有限公司 Rolling process shared by round hole with diameter of 5.5 and threaded hole with diameter of 6.0
CN104148380A (en) * 2014-08-25 2014-11-19 武钢集团昆明钢铁股份有限公司 Method for rolling rods with 150 square blanks and 165 square blanks through both rough rolling and intermediate rolling
CN106001119A (en) * 2016-06-14 2016-10-12 大冶特殊钢股份有限公司 Common pass system for rolling square blanks and circular blanks
CN109174963A (en) * 2018-08-21 2019-01-11 唐山市德龙钢铁有限公司 A kind of empty milling train production method excessively of Bar Wire Product grooveless rolling
CN210253577U (en) * 2019-07-05 2020-04-07 山西通才工贸有限公司 Rolling mill outlet guide and guard device used in pass-free rolling production
CN111842480A (en) * 2020-07-08 2020-10-30 鞍钢股份有限公司 Adjusting method for rolling wire rod product with specification phi of 12.3mm by double-pass system
CN112296085A (en) * 2020-08-14 2021-02-02 陕钢集团汉中钢铁有限责任公司 Rough rolling type system for rolling 165 square billets

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4685320A (en) * 1981-08-05 1987-08-11 Kawasaki Steel Corporation Method of rolling steel rods and wires with grooveless rolls and grooveless rolling entry guide
CN201889316U (en) * 2010-02-24 2011-07-06 武汉钢铁(集团)公司 Rolled steel production line
CN104043647A (en) * 2013-11-13 2014-09-17 山东西王特钢有限公司 Rolling process shared by round hole with diameter of 5.5 and threaded hole with diameter of 6.0
CN104148380A (en) * 2014-08-25 2014-11-19 武钢集团昆明钢铁股份有限公司 Method for rolling rods with 150 square blanks and 165 square blanks through both rough rolling and intermediate rolling
CN106001119A (en) * 2016-06-14 2016-10-12 大冶特殊钢股份有限公司 Common pass system for rolling square blanks and circular blanks
CN109174963A (en) * 2018-08-21 2019-01-11 唐山市德龙钢铁有限公司 A kind of empty milling train production method excessively of Bar Wire Product grooveless rolling
CN210253577U (en) * 2019-07-05 2020-04-07 山西通才工贸有限公司 Rolling mill outlet guide and guard device used in pass-free rolling production
CN111842480A (en) * 2020-07-08 2020-10-30 鞍钢股份有限公司 Adjusting method for rolling wire rod product with specification phi of 12.3mm by double-pass system
CN112296085A (en) * 2020-08-14 2021-02-02 陕钢集团汉中钢铁有限责任公司 Rough rolling type system for rolling 165 square billets

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