CN113458141B - Finish rolling deformed steel bar rolling method - Google Patents
Finish rolling deformed steel bar rolling method Download PDFInfo
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- CN113458141B CN113458141B CN202110798247.2A CN202110798247A CN113458141B CN 113458141 B CN113458141 B CN 113458141B CN 202110798247 A CN202110798247 A CN 202110798247A CN 113458141 B CN113458141 B CN 113458141B
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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
- B21B1/16—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
- B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
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Abstract
The invention discloses a rolling method of finish rolling deformed steel bar, relates to the technical field of rolling mills, and solves the technical problem that a part of rolling mills in related technologies are not beneficial to roller phase adjustment due to the fact that universal couplings are not arranged. Marking a first marking line on one side of the end surface of the upper roll collar and a second marking line on one side of the end surface of the lower roll collar, wherein the first marking line and the second marking line are arranged along the radial direction; rotating the upper roller ring and the lower roller ring to enable the first marking line and the second marking line to be vertically arranged; trial rolling is carried out, the deviation distance delta L of the upper transverse rib and the lower transverse rib of a rolled finished product is measured, and the deviation distance delta L is converted into a phase angle theta needing to be adjusted; manually turning the first marking line and the second marking line back to the radially-arranged state in step S1; and rotating the upper roll collar or the lower roll collar to control the rotation angle to be consistent with the phase angle theta. Therefore, the problem of accurate adjustment of the phase of the roller under the condition without a phase adjustment coupler is solved, and a foundation guarantee is provided for producing a finished product of finish rolling threads with upper and lower transverse ribs forming a continuous spiral line.
Description
Technical Field
The invention relates to the technical field of rolling mills, in particular to a method for rolling finish-rolled deformed steel bars.
Background
The finish-rolled deformed bar, also called a deformed bar for prestressed concrete, is a high-strength and high-precision straight bar steel bar with external threads rolled on the whole bar, and the current demand for the finish-rolled deformed bar is gradually increased year by year. The production difficulty of finish rolling deformed steel bars lies in that the upper transverse rib and the lower transverse rib of any section of the whole steel bar form a continuous spiral line, so that the key point for adjusting the radial phase of a roller in the rolling process is.
When the bar is produced on a bar production line, an upper roller transmission end coupler of a general finished product rolling mill adopts a universal coupler with adjustable phase, a small steel sample is firstly rolled in a trial mode during production, the deviation linear distance of an upper transverse rib and a lower transverse rib is measured, then the radial phase required to be adjusted of a roller is calculated according to the diameter of a working roller and before rolling, and the roller is driven to rotate by a certain angle through the universal coupler with adjustable phase until the upper transverse rib and the lower transverse rib are rolled to form a finished product of a continuous spiral line.
Related applications exist such as the Morgan top-crossed 45 degree rolling mill, which cannot phase-adjust the rolls through radial fine-tuning couplings as in the bar products due to the absence of universal couplings.
Disclosure of Invention
The application provides a rolling method of finish rolling deformed steel bar, which solves the technical problem that in the related technology, a part of rolling mills are not beneficial to the phase adjustment of a roller because of no universal coupling.
The application provides a rolling method of finish rolling deformed steel bar, which is applied to a rolling mill for rolling deformed steel bar and comprises the step S1 of marking a first marking line on one side of the end surface of an upper roll ring with a finished hole pattern and marking a second marking line on one side of the end surface of a lower roll ring, wherein the first marking line and the second marking line are arranged along the radial direction; step S2, placing the upper roll collar and the lower roll collar on a finished product secondary roll shaft of a rolling mill, arranging the first marking line and the second marking line outwards, and rotating the upper roll collar and the lower roll collar to enable the first marking line and the second marking line to be vertically arranged; step S3, perfecting the trial rolling conditions, feeding the bar material prepared in advance into a finished product pass, manually turning the bar material for rolling, and keeping the shape and the size of the bar material consistent with the finished product dimension of the previous pass; step S4, measuring the deviation distance delta L of the upper and lower transverse ribs of the rolled finished product; step S5, manually turning to restore the first marking line and the second marking line to the radial arrangement state in the step S1; step S6, relieving pressure of the upper roller ring or the lower roller ring to enable the upper roller ring or the lower roller ring to freely rotate in the radial direction; step S7, converting the phase angle theta to be adjusted according to the delta L, rotating an upper roller ring or a lower roller ring which can rotate in the radial direction, and controlling the rotation angle to be consistent with the phase angle theta; and step S8, fixing the upper roll collar and the lower roll collar, and starting to roll.
Optionally, in step S6, the upper roller ring is decompressed;
step S7, a roller ring phase adjustment auxiliary plate is applied, the roller ring phase adjustment auxiliary plate is made of transparent materials, the bottom end of the roller ring phase adjustment auxiliary plate is arranged in an arc shape and is arranged outside the end surface of the lower roller ring;
the roller ring phase adjustment auxiliary plate is provided with a through-length scale mark in vertical arrangement, the through-length scale mark is just opposite to a second mark line, the roller ring phase adjustment auxiliary plate is further provided with an angle scale line group, the angle scale line group comprises a plurality of angle scale lines in fan-shaped arrangement, the center of a fan-shaped circle is consistent with the axis of the upper roller ring, and the two sides of the through-length scale line are symmetrically arranged on the angle scale line group.
Optionally, the roller ring phase adjustment auxiliary plate is marked with a zero degree indication on a through-length scale mark;
the set of angle graduations includes a plurality of minimum graduations settings.
Optionally, the set of angle graduations includes a plurality of first angle graduations, a plurality of second angle graduations, and a plurality of third angle graduations;
the plurality of first angle scale marks are arranged along the sector, and two adjacent first angle scale marks are separated by 1 degree;
the second angle scale marks are shorter than the first angle scale marks and are respectively arranged between two adjacent first angle scale marks and equally divide the area between the two adjacent first angle scale marks;
the third angle scale marks are shorter than the second angle scale marks, and on average every four third angle scale marks equally divide the area between two adjacent first angle scale marks into five equal parts.
Optionally, the first marking line and the second marking line are arranged adjacently.
Optionally, the bar comprises a lead bar.
Optionally, step S2 includes fitting the cone sleeve into the upper and lower roll rings and then fitting the cone sleeve and the upper and lower roll rings around the finished secondary roll shaft of the rolling mill.
Optionally, in step S1, the first mark line and the second mark line include stroke line forms.
Optionally, the rolls of the rolling mill comprise tungsten carbide roll rings.
Optionally, the mill comprises a morgan top cross 45 degree mill.
The beneficial effect of this application is as follows: the application provides a rolling method of finish rolling deformed steel bar, which utilizes a mark line to assist the phase adjustment of a roller, and comprises the steps of marking a first mark line and a second mark line in advance, then carrying out trial rolling, adjusting an upper roller ring and a lower roller ring to be in a vertical state of the first mark line and the second mark line before the trial rolling, decompressing one of the upper roller ring and the lower roller ring to rotate the upper roller ring and the lower roller ring by a theta angle through measuring the deviation distance delta L of the upper transverse rib and the lower transverse rib of a rolled finished product after the trial rolling and converting the deviation distance delta L into a phase angle theta needing to be adjusted, utilizing the phase angle theta to subsequently coil to a vertical arrangement state before the first mark line and the second mark line, then fixing the roller ring, and then carrying out formal start rolling, thereby solving the problem of the accurate phase adjustment of the roller under the condition without a phase adjustment coupler, and providing basic guarantee for producing the finished product of the finish rolling deformed steel bar with continuous spiral lines, and the adjustment is carried out once, so that the multiple red steel trial rolling links are saved, the waste amount is reduced, the adjustment time is shortened, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly introduced, and it is apparent that the drawings in the description are only some embodiments of the present invention.
FIG. 1 is a schematic view of an upper collar and a first marking line in a finish rolling deformed steel bar rolling method provided in the present application;
FIG. 2 is a schematic view of a finish rolled deformed steel bar rolling method according to the present application in which a first mark line of an upper collar and a second mark line of a lower collar are vertically arranged;
FIG. 3 is a schematic view of the deviation distance Δ L between the upper and lower cross ribs of the finished product rolled by the finish rolling deformed steel bar rolling method provided in the present application;
FIG. 4 is a schematic structural diagram of a roller ring phase adjustment auxiliary plate provided in the present application;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic view of the roller ring phase adjustment auxiliary plate provided in the present application in cooperation with upper and lower roller rings;
FIG. 7 is a schematic view of an angle of an upper roll ring rotated by a phase angle θ in the finish rolling deformed steel bar rolling method provided in the present application;
FIG. 8 is another schematic view of the finish rolling deformed steel bar rolling method according to the present application in which the first mark line of the upper collar and the second mark line of the lower collar are vertically arranged;
FIG. 9 is a flow chart of a finish rolled deformed steel bar rolling method provided herein.
The attached drawings are marked as follows: 100-upper roll ring, 110-first mark line, 200-lower roll ring, 210-second mark line, 300-roll ring phase adjustment auxiliary plate, 310-full length scale line, 320-angle scale line group, 321-first angle scale line, 322-second angle scale line, 323-third angle scale line.
Detailed Description
The embodiment of the application provides a method for rolling finish-rolled deformed steel bar, and solves the technical problem that in the related technology, a part of rolling mills are not beneficial to adjusting the phase of a roller due to the fact that universal couplings are not arranged.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a rolling method of finish rolling deformed steel bar is applied to a rolling mill for rolling deformed steel bar, and comprises the step S1 of marking a first marking line on one side of the end surface of an upper roll ring with a finished hole pattern and marking a second marking line on one side of the end surface of a lower roll ring, wherein the first marking line and the second marking line are arranged along the radial direction; step S2, placing the upper roll collar and the lower roll collar on a finished product secondary roll shaft of a rolling mill, arranging the first marking line and the second marking line outwards, and rotating the upper roll collar and the lower roll collar to enable the first marking line and the second marking line to be vertically arranged; step S3, perfecting the trial rolling conditions, feeding the bar material prepared in advance into a finished product pass, manually turning the bar material for rolling, and keeping the shape and the size of the bar material consistent with the finished product dimension of the previous pass; step S4, measuring the deviation distance delta L of the upper and lower transverse ribs of the rolled finished product; step S5, manually turning to restore the first marking line and the second marking line to the radial arrangement state in the step S1; step S6, relieving pressure of the upper roller ring or the lower roller ring to enable the upper roller ring or the lower roller ring to freely rotate in the radial direction; step S7, converting the phase angle theta to be adjusted according to the delta L, rotating an upper roller ring or a lower roller ring which can rotate in the radial direction, and controlling the rotation angle to be consistent with the phase angle theta; and step S8, fixing the upper roll collar and the lower roll collar, and starting to roll.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 9, the present embodiment provides a rolling method of finish-rolled deformed steel bar, applied to a rolling mill for rolling deformed steel bar, including the following steps:
step S1, marking a first mark line 110 on one side of the end surface of the finished hole type upper roll ring 100, and marking a second mark line 210 on one side of the end surface of the lower roll ring 200, wherein the first mark line 110 and the second mark line 210 are both arranged along the radial direction, as shown in fig. 1, fig. 1 shows a schematic diagram of the first mark line 110 of the upper roll ring 100, and the second mark line 210 of the lower roll ring 200 is similarly arranged;
step S2, placing the upper roll collar 100 and the lower roll collar 200 on a finished product frame roll shaft of a rolling mill, wherein the first marking line 110 and the second marking line 210 are both arranged outwards, the roll collar including the upper roll collar 100 and the lower roll collar 200 is radially rotatable before the roll collar is not pressed, and rotating the upper roll collar 100 and the lower roll collar 200 causes the first marking line 110 and the second marking line 210 to be vertically arranged, as shown in fig. 2;
step S3, perfecting the trial rolling conditions, feeding the bar material prepared in advance into a finished product pass, manually turning the bar material for rolling, and keeping the shape and the size of the bar material consistent with the finished product dimension of the previous pass;
step S4, measuring the deviation distance Δ L of the upper and lower transverse ribs of the rolled product, as shown in fig. 3;
step S5, manually turning the vehicle so as to restore the first marking line 110 and the second marking line 210 to the radial arrangement state in step S1, as shown in fig. 6;
step S6, utilizing a hydraulic press to release pressure of the upper roll collar 100 or the lower roll collar 200 so as to enable free radial rotation and not to rotate at the moment; fig. 9 shows that the upper roll collar 100 is depressurized, and similarly depressurized with respect to the lower roll collar 200.
Step S7, converting the phase angle θ into a phase angle θ to be adjusted according to the Δ L, rotating the upper roller ring 100 or the lower roller ring 200 which can rotate radially, and controlling the rotation angle to be consistent with the phase angle θ, as shown in fig. 7;
and step S8, fixing the upper roll collar 100 and the lower roll collar 200, and starting to roll.
It should be noted that, in the above technical solution, the radial rotation is not required in the processes of pressing and releasing the roll collar.
In the finish rolling screw-thread steel rolling method, the phase adjustment of the rollers is assisted by using the mark lines, the first mark line 110 and the second mark line 210 are marked in advance, then trial rolling is carried out, the upper roller ring 100 and the lower roller ring 200 are adjusted to be in a vertical state until the first mark line 110 and the second mark line 210 are in a vertical state before the trial rolling, after the trial rolling, one of the upper roller ring 200 and the lower roller ring 200 is decompressed by measuring the deviation distance delta L of the upper transverse rib and the lower transverse rib of a rolled finished product and converting the deviation distance delta L into the phase angle theta needing to be adjusted, and then the upper roller ring and the lower roller ring are turned to be in a vertical arrangement state until the first mark line 110 and the second mark line 210 are in a state before the phase angle theta is utilized, so that the upper roller ring and the lower roller ring are rotated by the theta angle, then the roller rings are fixed, and then the formal start rolling is carried out.
Therefore, the method for rolling the finish-rolled deformed steel bar solves the problem of accurate adjustment of the phase of the roller without a phase adjustment coupler, and provides basic guarantee for producing a finished finish-rolled deformed steel bar with upper and lower transverse ribs forming continuous spiral lines.
In addition, the method only needs to be adjusted once, so that the multiple red steel trial rolling links are saved, the waste amount is reduced, the adjustment time is favorably shortened, and the working efficiency is improved.
In steps S6 and S7, the upper roll collar 100 is depressurized and rotated by the angle θ, or the lower roll collar 200 is depressurized and rotated by the angle θ, so that the roll phase can be precisely adjusted. Wherein the rotation angles are equal and opposite in both ways of rotating the lower roller ring 200 and the upper roller ring 100 with the same upper and lower cross rib deflection distance Δ L.
In step S7, the phase angle θ to be adjusted is converted from Δ L, and the diameter of the deformed steel bar is used.
The perfecting of the trial rolling condition in step S3 can be understood as that the upper roll collar 100 and the lower roll collar 200 are fixed by pressing with a hydraulic press according to a conventional procedure, and other preparations are made to meet the trial rolling condition.
Optionally, step S2 includes loading the taper sleeve into the upper and lower roll rings 100 and 200, and then sleeving the taper sleeve and the upper and lower roll rings 100 and 200 onto the finished frame roller shaft of the rolling mill, and the side of the roll ring marked with the mark line faces outwards according to the conventional procedure.
Alternatively, it is preferable to decompress the upper roller ring 100 in step S6. Accordingly, in step S7, a roller ring phase adjustment auxiliary plate 300 is applied, the roller ring phase adjustment auxiliary plate 300 is made of a transparent material, the transparent material may be made of transparent plastic, and the bottom end of the roller ring phase adjustment auxiliary plate 300 is disposed in an arc shape, and can be closely attached to a taper sleeve and placed outside the end face of the lower roller ring 200.
As shown in fig. 4 and 5, the roller ring phase adjustment auxiliary plate 300 is provided with through-length scale marks 310 arranged vertically, the through-length scale marks 310 are arranged right opposite to the second mark lines 210, the roller ring phase adjustment auxiliary plate 300 is further provided with angle scale mark groups 320, each angle scale mark group 320 comprises a plurality of angle scale marks arranged in a fan shape, the circle center of the fan shape is consistent with the axis of the upper roller ring 100, and the angle scale mark groups 320 are symmetrically arranged on two sides of the through-length scale marks 310. By covering the second mark line 210 with the full length scale line 310, the phase of the roll radial adjustment can be accurately calibrated by comparing the first mark line 110 with the full length scale line 310 and referring to the angle scale line group 320 when adjusting the upper roll ring 100.
Alternatively, referring to fig. 4 and 5, the roller ring phase adjustment auxiliary plate 300 is marked with a zero degree indication on the full-length scale line 310, and the angle scale line group 320 includes a plurality of minimum scale settings. Therefore, through the cooperation of the full-length scale mark 310 and the angle scale mark group 320, the purpose that one of the upper roll ring 200 and the lower roll ring 200 is decompressed to rotate the upper roll ring and the lower roll ring by an angle theta is achieved when the subsequent jigger turns to the state that the first mark line 110 and the second mark line 210 are vertically arranged. Through the cooperation of various minimum scales, improve the highest adjustment accuracy, can accurate calibration roll radial adjustment's phase place.
Optionally, referring to fig. 4 and 5, the angle scale set 320 includes a plurality of first angle scale marks 321, a plurality of second angle scale marks 322, and a plurality of third angle scale marks 323. The plurality of first angle graduations 321 is arranged along a fan shape, and two adjacent first angle graduations 321 are separated by 1 degree. The second angle scale marks 322 are shorter than the first angle scale marks 321, and the second angle scale marks 322 are respectively disposed between two adjacent first angle scale marks 321 and equally divide the area between two adjacent first angle scale marks 321. The third angle tick marks 323 are arranged shorter than the second angle tick marks 322, and on average every fourth third angle tick mark 323 equally divides the area between two adjacent first angle tick marks 321 into five equal parts.
Therefore, the minimum scale of the first angle scale mark 321 is 1 degree, the minimum angle of the second angle scale mark 322 is 0.5 degree, and the minimum angle of the third angle scale mark 323 is 0.2 degree, and the three are matched to adjust the rotation angle of the upper roll collar 100 or the lower roll collar 200 by theta, so that the radial adjustment phase of the roll can be accurately calibrated.
More, the roller ring phase adjustment auxiliary plate 300 has more angle scale marks and arrangement modes of the minimum angle value.
Alternatively, as shown in fig. 2, the first mark line 110 is located at the lower half portion of the upper roll ring 100, the second mark line 210 is located at the upper half portion of the upper roll ring 100, and the first mark line 110 and the second mark line 210 are adjacently disposed, so as to facilitate the subsequent rotation of the upper roll ring 100 or the lower roll ring 200 by the rotation angle θ with reference to the roll ring phase adjustment auxiliary plate 300.
In other ways, it is also possible that the second marking line 210 is located at the lower half of the lower roll ring 200, or the first marking line 110 is located at the upper half of the upper roll ring 100, as shown in fig. 8, and so on, in such a way that the first marking line 110 and the second marking line 210 are connected to form a straight line, and the straight line passes through the center of the upper roll ring 100 and the center of the lower roll ring 200. Correspondingly, the graduation marks on the roller ring phase adjustment auxiliary plate 300 are adjusted accordingly to match the angle of rotation θ.
Optionally, the bar comprises a lead bar. The bar material can also adopt red steel, but the lead bar is adopted to replace the rolling of the red steel, so that the adjusting time can be saved, the waste product quantity is reduced, and the working efficiency is improved.
Alternatively, the finish rolling screw-thread steel rolling method of the embodiment can be applied to rolling lines of domestic high-speed bar production lines, which have 22 rolling mills, including 6 roughing mills, 8 intermediate rolling mills, 4 pre-finishing mills and 4 finishing mills. The rough rolling mill and the middle rolling mill are short-stress high-rigidity rolling mills, are arranged horizontally and vertically in an alternating mode and are driven independently, and loops are arranged between the last two middle rolling mills, the middle rolling mill group and the pre-finishing mill group; 4 frames of the pre-finishing mill group are horizontally and vertically arranged in an alternating way and are driven independently, the roller adopts a tungsten carbide roller ring, and a loop is arranged between the frames; the water cooling is arranged behind the pre-finishing mill group, and a loop is arranged between the pre-finishing mill group and the finishing mill group; the finishing mill group is a Morgan top-crossed 45-degree rolling mill and is driven by 4 frames in a collective mode. Conventional high-speed bar production equipment such as a multi-length shear, a pinch roll, high-speed steel feeding equipment, a cooling bed, a cold shear and the like are arranged behind the finishing mill group.
The production line is adopted to produce finish rolling threads with the specification of phi 15mm and phi 18mm, finished products are produced from a Morgan top-crossed 45-degree rolling mill, the rolling speed reaches 22-27m/s and is far higher than the rolling speed of a common bar production line by 10-15m/s, the production efficiency is greatly improved, and the precision and the quality of the products are improved.
The Morgan top-crossed 45-degree rolling mill adopts collective transmission, is of a cantilever structure, comprises a transmission part and a transmission part, adopts a gear structure to directly transmit two roll shafts, the roll shafts have certain taper, and tungsten carbide roll rings are mounted on the roll shafts through a cone sleeve by using a hydraulic press.
Optionally, in step S1, the first mark line 110 and the second mark line 210 include a stroke line form, wherein the stroke line width is not more than 0.1mm, and the thinner the line, the clearer the better.
Optionally, the roller of the rolling mill comprises a tungsten carbide roller ring, and is matched with a domestic conventional high-speed bar production line to produce a small-specification finish rolling deformed steel bar product, the rolling speed reaches 22-27m/s, the single-groove rolling quantity is high, the product precision is good, and the yield is improved by 45% -80% compared with that of the conventional bar rolling production.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A rolling method of finish-rolled deformed steel bar is characterized by being applied to a rolling mill for rolling deformed steel bar, and comprising the following steps:
s1, marking a first marking line on one side of the end face of the upper roll ring with the finished hole pattern machined, and marking a second marking line on one side of the end face of the lower roll ring, wherein the first marking line and the second marking line are arranged along the radial direction;
s2, placing the upper roll collar and the lower roll collar on a finished product secondary roll shaft of the rolling mill, wherein the first marking line and the second marking line are arranged outwards, and rotating the upper roll collar and the lower roll collar to enable the first marking line and the second marking line to be vertically arranged;
s3, perfecting the trial rolling condition, feeding a prepared bar into a finished product pass, manually turning the bar for rolling, and keeping the shape and the size of the bar consistent with the finished product size of the previous pass of the finished product;
s4, measuring the deviation distance delta L of the upper and lower transverse ribs of the rolled finished product;
s5, manually turning the first marking line and the second marking line back to the radially arranged state in the step S1;
s6, relieving the pressure of the upper roller ring to enable the upper roller ring to freely rotate in the radial direction;
s7, converting the delta L into a phase angle theta which needs to be adjusted, rotating the upper roll collar which can rotate in the radial direction, and controlling the rotation angle to be consistent with the phase angle theta;
s8, fixing the upper roll collar and the lower roll collar, and starting to roll;
a roller ring phase adjustment auxiliary plate is applied in step S7, the roller ring phase adjustment auxiliary plate is made of a transparent material, and the bottom end of the roller ring phase adjustment auxiliary plate is arranged in an arc shape and is disposed outside the end surface of the lower roller ring; the roller ring phase adjustment auxiliary plate is provided with a through-length scale mark which is vertically arranged, the through-length scale mark is over against the second mark line, the roller ring phase adjustment auxiliary plate is further provided with an angle scale line group, the angle scale line group comprises a plurality of angle scale lines which are arranged in a fan shape, the center of the fan shape is consistent with the axis of the upper roller ring, and the angle scale line group is symmetrically arranged on two sides of the through-length scale line.
2. The finish rolled deformed steel bar rolling method of claim 1, wherein the collar phase adjustment auxiliary plate is marked with a zero degree indication on the full length scale line;
the set of angle graduations includes a plurality of minimum graduations settings.
3. The finish rolled threaded steel rolling method of claim 2, wherein the set of angle graduations comprises a plurality of first angle graduations, a plurality of second angle graduations, and a plurality of third angle graduations;
the first angle scale marks are arranged along a fan shape, and two adjacent first angle scale marks are separated by 1 degree;
the second angle scale marks are shorter than the first angle scale marks and are respectively arranged between two adjacent first angle scale marks and equally divide the area between the two adjacent first angle scale marks;
the third angle scale marks are shorter than the second angle scale marks, and every four third angle scale marks averagely divide the area between every two adjacent first angle scale marks into five equal parts.
4. The finish rolled threaded steel rolling method of claim 1, wherein the first marking line and the second marking line are disposed adjacent to each other.
5. The finish rolled deformed steel bar rolling method of claim 1, wherein the bar includes a lead bar.
6. The finish rolling deformed steel bar as claimed in claim 1, wherein said step S2 includes fitting a cone into said upper collar and said lower collar, and fitting said cone and said upper collar and said lower collar onto a final secondary roll shaft of said rolling mill.
7. The finish rolled threaded steel rolling method of claim 1, wherein in step S1, the first mark line and the second mark line include a stroke line form.
8. The finish rolled deformed steel bar rolling method of claim 1, wherein the rolls of the rolling mill include tungsten carbide collars.
9. The finish rolled threaded steel rolling method of claim 1, wherein the rolling mill comprises a Morgan top cross 45 degree rolling mill.
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