CN111530924A - Method for producing nonferrous metal wires of different specifications by using high-speed wire mill - Google Patents
Method for producing nonferrous metal wires of different specifications by using high-speed wire mill Download PDFInfo
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- CN111530924A CN111530924A CN202010384537.8A CN202010384537A CN111530924A CN 111530924 A CN111530924 A CN 111530924A CN 202010384537 A CN202010384537 A CN 202010384537A CN 111530924 A CN111530924 A CN 111530924A
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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
- B21B1/18—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 in a continuous process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0206—Coolants
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Abstract
The invention provides a method for producing nonferrous metal wires with different specifications by using a high-speed wire rolling mill, which comprises the following steps: selecting materials, heating, carrying out flat roll micro-rolling or pre-rough rolling, carrying out rough rolling, pre-finish rolling, pre-water cooling temperature control, finish rolling, water cooling temperature control, wire laying, air cooling temperature control and packaging, rolling non-ferrous metal blanks with different specifications and lengths into regular square blanks through flat rolls, then carrying out pre-finish rolling to obtain round bars, and finally carrying out finish rolling to obtain non-ferrous metal wires with different specifications. The invention realizes the rolling of various nonferrous metal blanks with different specifications on the high-speed wire rod rolling mill by the flat roller micro rolling, overcomes the problem that the hole pattern rolling blank of the high-speed wire rod rolling mill has singleness, realizes the collinear production of nonferrous metals such as nickel titanium and the like or alloy wires thereof and steel wires, greatly improves the yield and the quality of the nonferrous metal wires and improves the economic benefit.
Description
Technical Field
The invention relates to the technical field of nonferrous metal processing, in particular to a method for producing nonferrous metal wires with different specifications by using a high-speed wire rolling mill.
Background
The wire rod in the steel industry generally adopts a full-continuous horizontal-vertical alternative high-speed wire rod rolling mill, the speed can reach 90m/s, the rolling and cooling control can be realized, the annual output can reach 60-70 ten thousand tons, and the method has the advantages of single and high-efficiency hole-shaped rolled blank, small head-tail temperature difference and good quality.
At present, the production process of non-ferrous metal wire rods at home and abroad mainly adopts a horizontal rolling mill, a double rolling mill or a semi-continuous rolling mill for production, the annual output is 5-25 ten thousand tons, the rolling speed is lower than 16m/s, the total output of the non-ferrous metal wire rods is low, the efficiency of the rolling mill is low, the defects of large head-tail temperature difference, poor dimensional precision of finished products and single blank size exist, and the temperature control and rolling cannot be realized. Therefore, if a high-speed wire mill can be used to produce non-ferrous metal wire, the production efficiency and product quality of the non-ferrous metal wire can be greatly improved. However, the high-speed wire rod rolling mill has the defect of single rolling blank with all hole patterns, the non-ferrous metal wire rods have small demand and non-uniform specification of casting blanks, and if the non-ferrous metal wire rods are produced on a full-continuous horizontal and vertical alternating high-speed wire rod rolling mill, the productivity advantage of the rolling mill is difficult to exert, so that the cost is increased, and therefore, the non-ferrous metal wire rod rolling mill is not suitable for producing the.
Disclosure of Invention
The invention aims to provide a method for producing nonferrous metal wires of different specifications by using a high-speed wire rolling mill, which can overcome the singleness of hole-type rolling blanks of high-speed wires and realize the collinear production of nonferrous metals and common steel wires, thereby solving the problems in the background art.
The invention provides a method for producing nonferrous metal wires with different specifications by using a high-speed wire rolling mill, which comprises the following steps:
step one, selecting materials: selecting a non-ferrous metal blank with a square cross section and a side length of 65-160 mm;
step two, heating: selecting the blank to be distributed in a single row or double rows in a heating furnace according to the length of the blank, and heating the blank to 950-970 ℃ by using the heating furnace;
step three, flat roller micro rolling or pre-rough rolling: selecting flat roller micro rolling or pre-rough rolling according to the specification and the size of the blank, wherein the flat roller micro rolling adopts a flat roller mill with no more than 6 frames to roll the blank, and the blank is rolled into a square bar with a regular square cross section; pre-rough rolling is carried out by adopting a pre-rough rolling machine with no more than 6 frames to carry out hole type pre-rough rolling to obtain a round bar material A;
step four, rough rolling: cutting off the irregular head and tail parts of the square bar or round bar A obtained in the step three by using flying shears, and selecting 8-14 frames of rough rolling mills according to the specification and size of the blank to perform rough rolling with a hole pattern to obtain a round bar B;
step five, pre-finish rolling: shearing the irregular head and tail parts of the round bar B obtained in the fourth step by using flying shears, then pre-finish rolling the sheared round bar B, and rolling by using a pre-finish rolling machine with the number of less than 4 to obtain a round bar C with the reduced diameter;
step six, pre-water cooling temperature control: cooling the round bar C in the fifth step sequentially in a water cooling mode, wherein the temperature reaches 910-950 ℃;
step seven, finish rolling: after temperature control, shearing off irregular parts in shape generated at the head and tail parts of the round bar C after pre-finish rolling by using a flying shear, selecting a finish rolling mill with the number of less than or equal to 10 according to the size of a blank to finish rolling the round bar C, and rolling the round bar C into a wire;
step eight, water cooling temperature control: cooling the wire rod in a water cooling mode in sequence to enable the temperature of the wire rod to reach 940-980 ℃;
step nine, spinning: sending the wire clamp to a wire laying head, and winding the wire into a round shape by using the wire laying head to obtain a wire rod;
step ten, air cooling temperature control: the wire rod is scattered and coiled, and is cooled in an air cooling mode in sequence, and then the wire rod is collected and packaged;
preferably, the cross-sectional specifications of the blank in the first step include 65mm, 85mm, 120mm and 160mm, the length of the blank is 5300 ± 100mm, 9000 ± 100mm or 11000 ± 100mm, wherein the blank with the length of 5300 ± 100mm is heated by a double-row material distribution mode, and the blank with the length of 9000 ± 100mm or 11000 ± 100mm is heated by a single-row material distribution mode.
Preferably, in the second step, a double heat storage stepping heating furnace is adopted to heat the blank.
Preferably, the heating process in the second step can be divided into a preheating section, a heating section and a soaking section, wherein the temperature of the blank in the preheating section is 880-920 ℃, the temperature of the blank in the heating section is 970-990 ℃, the final temperature of the blank in the soaking section is 950-970 ℃, and the residence time of the blank in the furnace is 90-120 min.
Preferably, guides and guards for guiding the blanks to enter and exit the rolling mill in the required direction and state are arranged at the inlet and outlet of the flat rolling mill frame used for the flat roll micro-rolling in the third step, the elongation coefficient of each pass of each flat rolling mill is controlled to be 1.0-1.41 in the rolling process, and the running speed of the blanks is 0.1-0.7 m/s.
Preferably, the elongation coefficient of each pass of each pre-roughing mill used for pre-roughing in the third step is 1.19-1.55, and the running speed of the blank is 0.094 m/s-0.82 m/s.
Preferably, in the fourth rough rolling process, the elongation coefficient of each pass of each rough rolling mill is controlled to be 1.17-1.50, and the running speed of the square bar or round bar A is 0.74-6.03 m/s.
Preferably, in the fifth pre-finish rolling process, the elongation coefficient of each pass of each pre-finish rolling mill is controlled to be 1.21-1.30, and the running speed of the round bar stock B in the rolling process is 4.8-14.01 m/s.
Preferably, in the seventh finish rolling process, the elongation coefficient of each pass of each finish rolling mill is controlled to be 1.20-1.30, the running speed of the round bar C in the rolling process is 11.27-85.00 m/s,
preferably, the third step of the blank with the cross section of 65mm by 65mm is to use 6 flat rolling mills to carry out flat roll micro-rolling; thirdly, 4 flat rolling mills are selected to carry out flat roll micro rolling on the blank with the cross section of 85mm by 85 mm; thirdly, performing flat-roll micro-rolling on the blank with the cross section of 120mm by using a 2-frame flat-roll rolling mill; and step three, the blank with the cross section of 160mm by 160mm is subjected to hole-type pre-rough rolling by adopting a rough rolling machine.
The invention has the following beneficial effects:
1. the rolling of various nonferrous metal blanks with different specifications is realized through the flat roll micro rolling, and the problem that the blanks have singleness when a high-speed wire rod mill is adopted for pass rolling is solved;
2. the collinear production of nonferrous metals such as nickel titanium and the like or alloy wires thereof and steel wires is realized, the production efficiency and the annual output of the nonferrous metal wires are greatly improved, and the economic benefit is improved;
3. through the improvement of the production process, the control of the heating temperature and the cooling temperature is more refined, and the quality of the nonferrous metal wire is improved.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms also include the plural forms unless the context clearly dictates otherwise, and further, it is understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
A method for producing nonferrous metal wires with different specifications by using a high-speed wire rolling mill comprises the following steps:
step one, selecting materials: selecting a nickel (N6) blank with the size specification of 65mm by 5300 mm;
step two, heating: selecting a double heat storage heating furnace to heat the blank, arranging the blank in the furnace in double rows, preheating the blank to make the temperature of the blank reach 880 ℃, then rapidly heating the blank to make the temperature of the blank reach 970 ℃, and finally making the blank enter a soaking state to make the temperature of the blank stable to 960 ℃, wherein the total time of the blank staying in the furnace is 90 min;
step three, flat roller micro rolling: selecting 6 flat rolling mills according to the specification and the size of the blank to carry out flat roll micro-rolling on the heated blank, rolling the blank into a square bar with a regular square cross section, arranging guides for guiding the blank to smoothly pass in and out according to the required direction and state at the inlet and outlet of the stand, controlling the extension coefficient of each pass of the flat rolling mills to be 1.0 in the rolling process, and controlling the running speed of the blank to be 0.1 m/s;
step four, rough rolling: cutting off the irregular head and tail parts of the square bar obtained in the third step by using flying shears, selecting 8 rough rolling mills according to the specification and size of the blank to perform rough rolling with a hole pattern, controlling the elongation coefficient of each pass to be 1.17 in the rolling process, and controlling the running speed of the blank to be 3.80m/s to obtain the square bar
A round bar material B;
step five, pre-finish rolling: shearing the irregular head and tail parts of the round bar B obtained in the fourth step by using flying shears, then performing pre-finish rolling on the sheared round bar B, selecting 4 pre-finish rolling mills for rolling, controlling the elongation coefficient of each pass of the pre-finish rolling mills to be 1.21 in the rolling process, and controlling the running speed of the round bar B to be 8.70m/s in the rolling process to obtain the round bar B
The round bar stock C;
step six, pre-water cooling temperature control: cooling the round bar C obtained by pre-finish rolling in the fifth step in a water cooling mode in sequence, wherein the temperature reaches 910 ℃;
step seven, finish rolling: after temperature control, shearing off irregular shapes generated at the head and tail parts of the pre-finish-rolled round bar C by using flying shears, selecting 10 finish rolling mills to finish-roll the round bar C, controlling the extension coefficient of each pass of the finish rolling mills to be 1.20 in the rolling process, controlling the running speed of the round bar C to be 85.00m/s in the rolling process, and subjecting the round bar C to finish rolling
Rolling round bar stock C
The wire rod of (1);
step eight, water cooling temperature control: cooling the wire rod obtained after finish rolling in a water cooling mode in sequence to enable the temperature of the wire rod to reach 940 ℃;
step nine, spinning: clamping and conveying the wire to a wire laying head, and winding the wire into a round shape by using the wire laying head to obtain a wire rod;
step ten, air cooling temperature control: and (3) scattering and coiling the wire rod, cooling the wire rod in an air cooling mode in sequence, and packaging and warehousing the cooled wire rod coil.
Example two
A method for producing nonferrous metal wires with different specifications by using a high-speed wire rolling mill comprises the following steps:
step one, selecting materials: selecting a nickel (N6) blank with the size specification of 85mm by 9000 mm;
step two, heating: selecting a double heat storage heating furnace to heat the blank, arranging the blank in the furnace in a single row, preheating the blank to make the temperature of the blank reach 900 ℃, then rapidly heating the blank to make the temperature of the blank reach 975 ℃, and finally making the blank enter a soaking state to make the temperature of the blank stable to 950 ℃, wherein the total time of the blank staying in the furnace is 100 min;
step three, flat roller micro rolling: selecting 4 flat rolling mills according to the specification and the size of the blank to carry out flat roll micro-rolling on the heated blank, rolling the blank into a square bar with a regular square cross section, arranging guides for guiding the blank to smoothly pass in and out according to the required direction and state at the inlet and outlet of the stand, controlling the extension coefficient of each pass of the flat rolling mills to be 1.04 in the rolling process, and controlling the running speed of the blank to be 0.4 m/s;
step four, rough rolling: the regular square bar material after the flat roller micro-rolling enters a 2-frame roughing mill for hole-pattern pre-roughing rolling to be rolled into
Circle ofCutting off irregular head and tail parts of the round bar A by using flying shears, then entering 8 rough rolling mills to carry out hole type rough rolling, controlling the elongation coefficient of each pass of each rough rolling mill to be 1.25 and the running speed of the bar to be 5.83m/s in the rolling process to obtain the round bar A
The round bar material B;
step five, pre-finish rolling: shearing the irregular head and tail parts of the round bar B obtained in the fourth step by using flying shears, then performing pre-finish rolling on the sheared round bar B, selecting 4 pre-finish rolling mills for rolling, controlling the elongation coefficient of each pass of the pre-finish rolling mills to be 1.25 in the rolling process, and controlling the running speed of the round bar B to be 10.28m/s in the rolling process to obtain the round bar B
The round bar stock C;
step six, pre-water cooling temperature control: cooling the round bar C obtained by pre-finish rolling in the fifth step in a water cooling mode in sequence, wherein the temperature reaches 930 ℃;
step seven, finish rolling: after temperature control, shearing off irregular shapes generated at the head and tail parts of the pre-finish-rolled round bar C by using flying shears, selecting 8 finish rolling mills to finish-roll the round bar C, controlling the extension coefficient of each pass of the finish rolling mills to be 1.25 in the rolling process, and controlling the running speed of the round bar C to be 60.00m/s in the rolling process, so that the round bar C is rolled
Rolling round bar stock C
The wire rod of (1);
step eight, water cooling temperature control: cooling the wire rod obtained after finish rolling in a water cooling mode in sequence to enable the temperature of the wire rod to reach 950 ℃;
step nine, spinning: clamping and conveying the wire to a wire laying head, and winding the wire into a round shape by using the wire laying head to obtain a wire rod;
step ten, air cooling temperature control: and (3) scattering and coiling the wire rod, cooling the wire rod in an air cooling mode in sequence, and packaging and warehousing the cooled wire rod coil.
EXAMPLE III
A method for producing nonferrous metal wires with different specifications by using a high-speed wire rolling mill comprises the following steps:
step one, selecting materials: selecting a nickel (N6) blank with the size specification of 120mm by 5400 mm;
step two, heating: selecting a double heat storage heating furnace to heat the blank, arranging the blank in the furnace in a single row, preheating the blank to make the temperature of the blank reach 910 ℃, then rapidly heating the blank to make the temperature of the blank reach 980 ℃, and finally making the blank enter a soaking state to make the temperature of the blank stable to 965 ℃, wherein the total time of the blank staying in the furnace is 110 min;
step three, flat roller micro rolling: selecting 2 flat rolling mills according to the specification and the size of the blank to carry out flat roll micro-rolling on the heated blank, rolling the blank into a square bar with a regular square cross section, arranging guides for guiding the blank to smoothly pass in and out according to the required direction and state at the inlet and outlet of the stand, controlling the extension coefficient of each pass of the flat rolling mills to be 1.41 in the rolling process, and controlling the running speed of the blank to be 0.7 m/s;
step four, rough rolling: the regular square bar material after the flat roller micro-rolling enters a 4-frame roughing mill for hole-pattern pre-roughing rolling to be rolled into
The round bar material A is cut off at the irregular head and tail parts of the round bar material A by flying shears, then the round bar material A enters 8 rough rolling mills to carry out pass rough rolling, the elongation coefficient of each pass is controlled to be 1.40 in the rolling process, and the running speed of the square bar material is controlled to be 6.03m/s, so that the round bar material A is obtained
The round bar material B;
step five, pre-finish rolling: shearing the irregular head and tail parts of the round bar B obtained in the fourth step by using flying shears, then pre-finish rolling the sheared round bar B, selecting 4 pre-finishing mills for rolling, and controlling the pre-finishing mills in the rolling processThe elongation coefficient of each pass is 1.26, the running speed of the round bar stock B in the rolling process is 14.01m/s, and the round bar stock B is obtained
The round bar stock C;
step six, pre-water cooling temperature control: cooling the round bar C obtained by pre-finish rolling in the fifth step in a water cooling mode sequentially, wherein the temperature reaches 940 ℃;
step seven, finish rolling: after temperature control, shearing off irregular shapes generated at the head and tail parts of the pre-finish-rolled round bar C by using flying shears, selecting 4 finish-rolling mills to finish-roll the round bar C, controlling the extension coefficient of each pass of the finish-rolling mills to be 1.26 in the rolling process, and controlling the running speed of the round bar C to be 34.0m/s in the rolling process, so that the round bar C is subjected to finish rolling
Rolling round bar stock C
The wire rod of (1);
step eight, water cooling temperature control: cooling the wire rod obtained after finish rolling in a water cooling mode in sequence to enable the temperature of the wire rod to reach 960 ℃;
step nine, spinning: clamping and conveying the wire to a wire laying head, and winding the wire into a round shape by using the wire laying head to obtain a wire rod;
step ten, air cooling temperature control: and (3) scattering and coiling the wire rod, cooling the wire rod in an air cooling mode in sequence, and packaging and warehousing the cooled wire rod coil.
Example four
A method for producing nonferrous metal wires with different specifications by using a high-speed wire rolling mill comprises the following steps:
step one, selecting materials: selecting a nickel (N6) blank with the size specification of 160mm by 11000 mm;
step two, heating: selecting a double heat storage heating furnace to heat the blank, arranging the blank in the furnace in a single row, preheating the blank to make the temperature of the blank reach 920 ℃, then rapidly heating the blank to make the temperature of the blank reach 990 ℃, and finally making the blank enter a soaking state to make the temperature of the blank stabilize to 970 ℃, wherein the total time of the blank staying in the furnace is 120 min;
step three, pre-rough rolling: adopting a 6-frame pre-roughing mill to perform hole-type pre-roughing rolling, wherein the extension coefficient of the mill is 1.19, and the running speed of the blank is 0.094m/s to obtain the product
The round bar material A;
step four, rough rolling: cutting off the irregular head and tail parts of the round bar material A obtained in the third step by using flying shears, selecting 8 rough rolling mills according to the specification and size of the blank to perform hole-pattern rough rolling, controlling the elongation coefficient of each pass to be 1.28 in the rolling process, and controlling the running speed of the round bar material A to be 5.84m/s to obtain the round bar material A
The round bar material B;
step five, pre-finish rolling: shearing the irregular head and tail parts of the round bar B obtained in the fourth step by using flying shears, then performing pre-finish rolling on the sheared round bar B, selecting 2 pre-finish rolling mills for rolling, controlling the elongation coefficient of each pass of the pre-finish rolling mills to be 1.21 in the rolling process, and controlling the running speed of the round bar B to be 8.7m/s in the rolling process to obtain the round bar B
The round bar stock C;
step six, pre-water cooling temperature control: cooling the round bar C obtained by pre-finish rolling in the fifth step in a water cooling mode sequentially, wherein the temperature reaches 950 ℃;
step seven, finish rolling: after temperature control, shearing off irregular shapes generated at the head and tail parts of the pre-finish-rolled round bar C by using flying shears, selecting 4 finish-rolling mills to finish-roll the round bar C, controlling the extension coefficient of each pass of the finish-rolling mills to be 1.20 in the rolling process, and controlling the running speed of the round bar C to be 18.27m/s in the rolling process, so that the round bar C is subjected to finish rolling
Rolling round bar stock C
The wire rod of (1);
step eight, water cooling temperature control: cooling the wire rod obtained after finish rolling in a water cooling mode in sequence to enable the temperature of the wire rod to reach 980 ℃;
step nine, spinning: clamping and conveying the wire to a wire laying head, and winding the wire into a round shape by using the wire laying head to obtain a wire rod;
step ten, air cooling temperature control: and (3) scattering and coiling the wire rod, cooling the wire rod in an air cooling mode in sequence, and packaging and warehousing the cooled wire rod coil.
EXAMPLE five
A method for producing nonferrous metal wires with different specifications by using a high-speed wire rolling mill comprises the following steps:
step one, selecting materials: selecting a nickel (N6) blank with the size specification of 160mm by 9100 mm;
step two, heating: selecting a double heat storage heating furnace to heat the blank, arranging the blank in the furnace in a single row, preheating the blank to make the temperature of the blank reach 900 ℃, then rapidly heating the blank to make the temperature of the blank reach 980 ℃, and finally making the blank enter a soaking state to make the temperature of the blank stable to 960 ℃, wherein the total time of the blank staying in the furnace is 120 min;
step three, pre-rough rolling: adopting a 6-frame pre-roughing mill to perform hole-pattern pre-roughing rolling, wherein the extension coefficient of the mill is 1.55, and the running speed of a blank is 0.82m/s to obtain the product
A round bar material A;
step four, rough rolling: cutting off the irregular head and tail parts of the round bar material A obtained in the third step by using flying shears, selecting 8 rough rolling mills according to the specification and size of the blank to perform hole-pattern rough rolling, controlling the elongation coefficient of each pass to be 1.50 in the rolling process, and controlling the running speed of the round bar material A to be 0.74m/s to obtain the round bar material A
The round bar material B;
step (ii) ofFifthly, pre-finish rolling: shearing the irregular head and tail parts of the round bar B obtained in the fourth step by using flying shears, then performing pre-finish rolling on the sheared round bar B, selecting 2 pre-finish rolling mills for rolling, controlling the elongation coefficient of each pass of the pre-finish rolling mills to be 1.30 in the rolling process, and controlling the running speed of the round bar B to be 4.8m/s in the rolling process to obtain the round bar B
The round bar stock C;
step six, pre-water cooling temperature control: cooling the round bar C obtained by pre-finish rolling in the fifth step in a water cooling mode in sequence, wherein the temperature reaches 930 ℃;
step seven, finish rolling: after temperature control, shearing off irregular shapes generated at the head and tail parts of the pre-finish-rolled round bar C by using flying shears, selecting 4 finish-rolling mills to finish-roll the round bar C, controlling the extension coefficient of each pass of the finish-rolling mills to be 1.30 in the rolling process, and controlling the running speed of the round bar C to be 11.27m/s in the rolling process, so that the round bar C is subjected to finish rolling
Rolling into round bar C
The wire rod of (1);
step eight, water cooling temperature control: cooling the wire rod obtained after finish rolling in a water cooling mode in sequence to enable the temperature of the wire rod to reach 960 ℃;
step nine, spinning: clamping and conveying the wire to a wire laying head, and winding the wire into a round shape by using the wire laying head to obtain a wire rod;
step ten, air cooling temperature control: and (3) scattering and coiling the wire rod, cooling the wire rod in an air cooling mode in sequence, and packaging and warehousing the cooled wire rod coil.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for producing nonferrous metal wires with different specifications by a high-speed wire rolling mill is characterized by comprising the following steps:
step one, selecting materials: selecting a non-ferrous metal blank with a square cross section and a side length of 65-160 mm;
step two, heating: selecting the blank to be distributed in a single row or double rows in a heating furnace according to the length of the blank, and heating the blank to 950-970 ℃ by using the heating furnace;
step three, flat roller micro rolling or pre-rough rolling: selecting flat roller micro rolling or pre-rough rolling according to the specification and the size of the blank, wherein the flat roller micro rolling adopts a flat roller mill with no more than 6 frames to roll the blank, and the blank is rolled into a square bar with a regular square cross section; pre-rough rolling is carried out by adopting a pre-rough rolling machine with no more than 6 frames to carry out hole type pre-rough rolling to obtain a round bar material A;
step four, rough rolling: cutting off the irregular head and tail parts of the square bar or round bar A obtained in the step three by using flying shears, and selecting 8-14 frames of rough rolling mills according to the specification and size of the blank to perform rough rolling with a hole pattern to obtain a round bar B;
step five, pre-finish rolling: shearing the irregular head and tail parts of the round bar B obtained in the fourth step by using flying shears, then pre-finish rolling the sheared round bar B, and rolling by using a pre-finish rolling machine with the number of less than 4 to obtain a round bar C with the reduced diameter;
step six, pre-water cooling temperature control: cooling the round bar C in the fifth step sequentially in a water cooling mode, wherein the temperature reaches 910-950 ℃;
step seven, finish rolling: after temperature control, shearing off irregular parts in shape generated at the head and tail parts of the round bar C after pre-finish rolling by using a flying shear, selecting a finish rolling mill with the number of less than or equal to 10 according to the size of a blank to finish rolling the round bar C, and rolling the round bar C into a wire;
step eight, water cooling temperature control: cooling the wire rod in a water cooling mode in sequence to enable the temperature of the wire rod to reach 940-980 ℃;
step nine, spinning: sending the wire clamp to a wire laying head, and winding the wire into a round shape by using the wire laying head to obtain a wire rod;
step ten, air cooling temperature control: and (3) the wire rod is scattered and coiled, and is cooled in an air cooling mode in sequence, and then the wire rod is collected and packaged.
2. The method as claimed in claim 1, wherein the cross-sectional dimensions of the billet in the first step include 65 x 65mm, 85 x 85mm, 120 x 120mm and 160 x 160mm, the length of the billet is 5300 ± 100mm, 9000 ± 100mm or 11000 ± 100mm, wherein the billet with the length of 5300 ± 100mm is heated by a double-row distribution method, and the billet with the length of 9000 ± 100mm or 11000 ± 100mm is heated by a single-row distribution method.
3. The method for producing nonferrous metal wire rods of different sizes using a high-speed wire rod mill according to claim 1, wherein said billet is heated in said second step by a double regenerative walking beam furnace.
4. The method for producing nonferrous metal wire rods of different specifications by using a high-speed wire rod mill according to claim 1, wherein the heating process in the second step is divided into a preheating section, a heating section and a soaking section, wherein the temperature of the blank in the preheating section is 880-920 ℃, the temperature of the blank in the heating section is 970-990 ℃, the final temperature of the blank in the soaking section is 950-970 ℃, and the residence time of the blank in the furnace is 90-120 min.
5. The method for producing nonferrous metal wire rods of different specifications by using a high-speed wire rod rolling mill according to claim 1, wherein guides for guiding the blanks to enter and exit the rolling mill in the required direction and state are arranged at the inlet and outlet of the flat rolling mill frame used for the flat roller micro-rolling in the third step, the elongation coefficient of each pass of each flat rolling mill is controlled to be 1.0-1.41 in the rolling process, and the running speed of the blanks is 0.1-0.7 m/s.
6. The method for producing nonferrous metal wire rods of different sizes by using a high-speed wire rod mill according to claim 1, wherein the elongation coefficient of each pass of the pre-roughing mill used in the pre-roughing in the third step is 1.19 to 1.55, and the running speed of the billet is 0.094m/s to 0.82 m/s.
7. The method for producing nonferrous metal wire rods of different specifications by using a high-speed wire rod mill according to claim 1, wherein in the four-step rough rolling process, the elongation coefficient of each pass of each rough rolling mill is controlled to be 1.17-1.50, and the running speed of the square bar or round bar A is controlled to be 0.74-6.03 m/s.
8. The method for producing nonferrous metal wire rods of different specifications by using a high-speed wire rod mill according to claim 1, wherein in the step five pre-finish rolling processes, the elongation coefficient of each pass of each pre-finish rolling mill is controlled to be 1.21-1.30, and the running speed of the round bar stock B in the rolling process is 4.8-14.01 m/s.
9. The method for producing nonferrous metal wire rods of different sizes using a high-speed wire rod mill according to claim 1, wherein in the seventh finish rolling, the elongation coefficient of each pass of each finish rolling mill is controlled to be 1.20 to 1.30, and the running speed of the round bar stock C during the rolling is controlled to be 11.27m/s to 85.00 m/s.
10. The method for producing nonferrous metal wire rods of different specifications by using a high-speed wire rod rolling mill according to claim 2, wherein the blank with the cross section of 65mm x 65mm is subjected to flat-roll micro-rolling by using a 6-frame flat-roll rolling mill in the third step; thirdly, 4 flat rolling mills are selected to carry out flat roll micro rolling on the blank with the cross section of 85mm by 85 mm; thirdly, performing flat-roll micro-rolling on the blank with the cross section of 120mm by using a 2-frame flat-roll rolling mill; and step three, the blank with the cross section of 160mm by 160mm is subjected to hole-type pre-rough rolling by adopting a rough rolling machine.
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