CN1097153A - Cored steel " heat is worn---hot rolling " and the method production technology - Google Patents
Cored steel " heat is worn---hot rolling " and the method production technology Download PDFInfo
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Abstract
The invention provides the production method of drill rod with cored steel---cored steel heat is worn-hot rolling production process, this technology is made up of 8 procedures such as round steel billet blanking, intermediate frequency inductor heating, Mannesmann piercing, three roll pipe, six roller one-shot formings, cooling, smart inspection packing, warehouse-ins, and round steel billet promptly is rolled into the hexagon cored steel by above 8 procedures; This production technology can be produced and be met ISO
722The complete series cored steel of standard-required, operation is simple, is easy to automatic control, can alleviate labor strength, reduce environmental pollution, reduce the cored steel cost, improve production efficiency, cored steel lumber recovery and product quality, can obtain favorable economic benefit and social benefit.
Description
The present invention relates to the production method of drill rod with cored steel.
Cored steel is produced existing method and is mainly contained: the boring method production technology, cast tube method production technology, heat wears-and Re dials three kinds of method production technologies etc., its technological process of production is seen Figure of description (figure-1. 2. 3.), the boring method production technology is owing to will hole in round steel billet, drilling process has the metal loss about 10%, the bit life that is used to hole be generally 18-25 rice/, the bit cost height, inefficiency, need cored in the production process and loose core, prepare high manganese plug, complex manufacturing, production cost height, if remove cored and loose core operation, then the product I SO of Sheng Chaning
722Standard qualification rate only 50～60%; Cast tube method production technology is when casting hollow ingot, pouring temperature is extremely narrow, only about 20 ℃, the high slightly steel pipe that will scorch of temperature produces sticking core, and the low slightly cast again of temperature is discontented, and steel ingot forms random chi, the steel ingot percent defective is higher more than 1 times than similar solid ingot, endoporus off-centre appears in ingot casting sometimes, and the degree of eccentricity reaches the 20-30 millimeter when serious, can't be corrected in afterwards the cogging of this eccentric defective, the operation of rolling; Heat wears-and Re dials the method production technology and produces cored steel, and the production process complexity is dialled stress because the cored steel interior tissue has been born bigger drawing in process of production, influence the cored steel quality, and because the dog operation is arranged, production efficiency is low, lumber recovery is 65-80% only, and production cost is higher.
The objective of the invention is to overcome the weak point of above-mentioned manufacturing technique method, provide a kind of can production to meet ISO
722The complete series cored steel of standard-required, and operation is simple, be easy to realize new process-" heat is worn-the hot rolling method " of cored steel production of control automatically, enhance productivity to reach, improve cored steel lumber recovery and product quality, improve labor strength, reduce environmental pollution, reduce the purpose of cored steel cost.
Below in conjunction with Figure of description (figure-4.), to the present invention in detail so that it to be described.
Cored steel heat in the Figure of description wears-and the hot rolling production process flow chart (figure-4.), form by 8 procedures such as round steel billet blanking, intermediate frequency inductor heating, Mannesmann piercing, three roll pipe, six roller one-shot formings, cooling, smart inspection packing, warehouse-ins, round steel billet promptly is rolled into the hexagon cored steel by above 8 procedures, and its technology characteristics is:
One, intermediate frequency inductor turns to cylindrical shape by the rectangle copper pipe of belt length square inner bore, the GYG ceramic furnace lining is installed in the cylinder, the furnace lining internal diameter is determined according to the steel billet diameter, than the big 4-5mm of steel billet external diameter, every group of long 500～1000mm of inductor, inductor divides A, B, C three classes, the coil copper pipe size and the number of turn difference that are used for coiling three class inductors, three class inductor heating power differences then, wherein the category-A inductor is used for preheating, the category-B inductor is used for heating up, C class inductor is used for insulation, A, B, C three class inductors are arranged in the straight line series connection in order and use, between inductor and the inductor apart from about 100mm, be used to install support roller, support roller transports steel billet and walks in inductor, the support roller material is the low-carbon (LC) heat-resistance stainless steel, support roller drives transmission with chain, power is provided by buncher, steel billet drives the support roller transmission by chain, is taken up in order of priority from A, B, pass through in the C three class inductors, promptly eddy-current heating becomes to meet the steel billet of piercing temperature (1140-1200 ℃), 2500 hertz of heating current frequencies, 750 volts of voltages;
Two, Mannesmann piercing adopts Mannesmann formula φ 50 two-roll piercers, punch is by mainframe, main dragging partly, the foreground feeding partly and the backstage push rod is sent to and embrace parts composition such as pin-lift arrangement, embracing pin-lift arrangement is made up of five groups of pneumatic armful of rollers, the push rod diameter is φ 27.5-38mm, five groups of every groups of embracing in the roller are embraced 3 course of action (armful push rod of roller, for a short time open, open greatly) constituted respectively to organize pass size consistent, and remain on and do not have skew on the rolling production line, perforation charge length 921～2000mm, perforation blank diameter φ 50～65mm wears back capillary outer diameter φ 47～62mm, wall thickness 6.4～11mm, length 2175～3579mm, roller diameter φ 300-340mm, length 280mm, top diameter phi 28.5～40.5mm, length 80～85mm, 3 ° at perforation roll off angle, heading material is the MTZ molybdenum-base alloy; Guide plate inlet cone angle and go out cone angle and be 3 ° 30 ', compression belt length 10mm, compression bandwidth 34～46mm, the long 300mm of guide plate, high 45mm, material is a high-chromium casting, roll and guide plate opening degree are 36mm, it is 8 ° that punch is selected feed angle for use, between 6 °～12 °, regulate during installation, associated splice between the rotary drum of back-up roll and the fan-shaped briquetting that is used for limiting feed angle and be processed into the triangle teeth and be meshed, the revolution of screw thread precession briquetting braking rotary drum, make it to be fixed on perforation production under the given feed angle condition, two fields of conjugate action need keep sideshake, but need radially not kill (the spacing locking of two round nuts), thereby guarantee that unlikely need are opened fan-shaped briquetting to rotary drum with the adjusting easy for going up and down of roll gap, each teeth is corresponding to 1.5 ° feed angle, when embracing the push rod adjusting, should be according to the push rod diameter specifications of required employing, each group is embraced roller all should hold push rod tightly, the looping mill rolling diameter that is constituted when respectively group armful roller is opened for a short time should only be gone up an armful roller and open greater than the about 3～4mm of institute's perforated pipe external diameter when an armful roller is opened greatly, hollow billet was transferred to and unlikely the interference from the production line of boring a hole smoothly after should be able to guarantee to bore a hole this moment.
Three, the three roll pipe operation adopts A Saiershi φ 50 three-roll pipe mills, carry out hollow roll off to obtain external diameter by the hollow billet after utilizing three tilting rolls to perforation, the satisfactory hollow forging of internal diameter, three rolls of pipe mill are mutually 120 ° of layouts, hang the decelerator transmission by main motor through Hooks coupling universal coupling associating tooth, hollow billet blank diameter φ 47～62mm before the tube rolling, length 2175～3570mm, wall thickness 6.39～11.03mm, hollow forging diameter phi 24～41.8mm behind the tube rolling, length 4743～5496mm, wall thickness 7～12.55mm, roll is with respect to being formed centrally roll off angle β and feed angle α in rolling, the roll off angle is adjusted to the distance of rolling centerline by adjusting roll bearings at both ends center, should consider the influence of movable machine frame with respect to the anglec of rotation of fixed frame during adjustment, advancing angle then rotates with respect to fixed frame by movable machine frame to be adjusted, 2 ° of roll inlet cone angles feed 7 ° at angle, 12 °～16 ° at tube reducing angle, 3 ° at roll off angle, 1 ° of outlet cone angle.
Four, six roller one-shot forming operations, adopt " hollow hexagon steel one-shot forming milling train " (patent No. 914062139) of gain the national patent, it is characterized in that a motor is installed on the rolling-mill housing, power is through shaft coupling, decelerator, export by the gear on the decelerator, drive six rolls and the fixing conical gear rotation of roll be installed on the milling train housing by the bearing supporting through being installed in travelling gear on the milling train housing respectively, wherein the transmission of central gear has realized the power of a motor is distributed to six rolls, reaches once the purpose of rolling hexagon steel.
Five, swing cold bed, long 6949mm, wide 4920mm, tooth bar centre-to-centre spacing 1000mm are adopted in cooling, tooth pitch 100mm waves number of times 20 times/minute continuously, waves 3 seconds time at every turn, step distance 100mm, maximum is deposited 49 of steel radicals, starts rate 15%(interrupter duty relatively).
Six, G5025 type band saw machine is adopted in the blanking of round steel billet band.
The present invention and existing technology relatively are characterized in:
1, the present invention is used for the heating of cored steel production technology to Medium frequency induction equipment first, adopt special inductor heating steel billet, make steel billet add the thermosetting preheating, heat up, be incubated three processes, and guarantee that billet heating temperature meets the requirement of perforation process, heating rhythm, firing rate heats fast 10-15 doubly than coal gas, the oxidation decarburizing layer is lower more than 50% than the coal gas heating, efficiency of heating surface height, adopt capacitor to carry out reactive-load compensation, power factor (PF) is more than 98%, mobility strong can be started shooting or shut down at any time, and energy consumption is little, free from environmental pollution, realized the automation control of heating process in the cored steel production technology, the electric current during its equipment heating, voltage, after power factor (PF) and buncher speed were adjusted, heating process can be carried out automatically.
2, the present invention adopts Mannesmann formula φ 50 two-roll piercers, adopt 5 groups to embrace roller (general punch is 2～3 groups) first, make perforation length increase by 40～50%, solved general punch when being used for cored steel production, the not enough problem of perforation length, its guide plate entrance and exit cone angle all adopt 3 ° 30 ', 3 ° of roll inlet cone angle and outlet cone angles, being easy to steel billet nips, 3 ° of roll off angles are adopted in the top, and the life-span improves more than 20%, after adjusting roll roll spacing, guide plate distance and coming directly towards the peak with heading output, manually start push-botton operation, perforation procedure is just carried out automatically.
3, the present invention adopts A Saiershi pipe mill tube reducing, roll adopts 2 ° of inlet cone angles first, feeds 7 ° at angle, 12～16 ° at tube reducing angle, 3 ° at roll off angle, 1 ° of outlet cone angle, rolling steady, operating noise is less than 80 decibels, reduce by 15～20 decibels than general pipe mill noise, after the rolling mill roller pass was adjusted, the tube rolling process was just carried out automatically, does not need manually-operated.
4, the present invention adopts gain the national patent " hollow hexagon steel one-shot forming milling train " first, cored steel hexagonal forming technology is once finished on this milling train, ratio is generally with three open-train mills and a preload tension wire mill milling hexagonal forming, save three complete equipments and three process, energy consumption only is 15～20% of a general milling train, occupation area of equipment only is 10～15% of a general milling train, energy one-shot forming when rolling, and the power of being rolled is even, the empty circularity in center that has kept cored steel, adjust the hexagonal of milling train and roll type, the forming process after the start is carried out automatically, does not need manually-operated.
5, the present invention adopts swing cold bed, and than general chain-type cooling bed cooling evenly, the cold bed course of work is intermittently waved automatically.
6, the critical intermediate frequency inductor heating of the present invention, Mannesmann piercing, three roll pipe, six roller one-shot formings, cooling five processes, except that Mannesmann piercing needs artificial auxiliary operation button, all the other operation processes, after adjusting, all control automatically by equipment, only need artificial the supervision, do not need manually-operated.
7, the present invention and the most approaching heat of the present invention wear-Re dials the method production technology relatively, saves three process, operating efficiency, work rhythm obviously improve.
The present invention's " heat is worn-the hot rolling method " can produce and meet ISO
722The complete series cored steel of standard-required, operation is simple, is easy to automatic control, improve production efficiency, cored steel lumber recovery and product quality, alleviated labor intensity, reduced environmental pollution, reduce the cored steel cost, can obtain favorable economic benefit and social benefit.
Claims (5)
1, a kind of drill rod production method of cored steel, particularly heat is worn-hot rolling production process, it is characterized in that this production technology is made up of 8 procedures such as round steel billet blanking, intermediate frequency inductor heating, Mannesmann piercing, three roll pipe, six roller one-shot formings, cooling, smart inspection packing, warehouse-ins, round steel billet promptly is processed into the hexagon cored steel through 8 procedures.
2, cored steel heat as claimed in claim 1 is worn-hot rolling production process, the Medium frequency induction equipment that it is characterized in that the intermediate frequency inductor heating is arranged series connection point-blank in order by cylindrical shape A, B, C three class inductors, round steel billet drives the support roller transmission by chain, successively from A, B, C three class inductors, walk, make round steel billet obtain preheating, intensification, insulation, be heated into the steel billet that meets piercing temperature (1140-1200 ℃).
3, the heat of cored steel as claimed in claim 1 is worn-hot rolling production process, it is characterized in that the Mannesmann piercing process using embraces roller production for five groups, its guide plate entrance and exit cone angle is 3 ° 30 ', roll entrance and exit cone angle is 3 °, and 3 ° of roll off angles are adopted in the top.
4, a kind of cored steel heat as claimed in claim 1 is worn-hot rolling production process, it is characterized in that three roll pipe technology roll adopts 3 ° of inlet cone angles, feeds 7 ° at angle, 12 °～16 ° at tube reducing angle, 3 ° at roll off angle, 1 ° of outlet cone angle.
5, a kind of cored steel heat as claimed in claim 1 is worn-hot rolling production process, it is characterized in that the cored steel hexagonal forming adopts " the hollow hexagon steel one-shot forming milling train " of gain the national patent once to finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93107895 CN1097153A (en) | 1993-07-03 | 1993-07-03 | Cored steel " heat is worn---hot rolling " and the method production technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93107895 CN1097153A (en) | 1993-07-03 | 1993-07-03 | Cored steel " heat is worn---hot rolling " and the method production technology |
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| CN1097153A true CN1097153A (en) | 1995-01-11 |
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| CN 93107895 Pending CN1097153A (en) | 1993-07-03 | 1993-07-03 | Cored steel " heat is worn---hot rolling " and the method production technology |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317087C (en) * | 2002-08-19 | 2007-05-23 | 李明锁 | Technology for producing hollow steel by hot squeeze method |
| CN102974615A (en) * | 2012-11-08 | 2013-03-20 | 聊城市开发区全运钢管制造有限公司 | Rolling process method of punched lining core of steel rod |
| CN103212578A (en) * | 2012-01-20 | 2013-07-24 | 贵阳捷盛科技实业发展有限公司 | Finishing rolling method and device of oblique axial rolling cored steel |
| CN103706640A (en) * | 2013-12-31 | 2014-04-09 | 常州中钢精密锻材有限公司 | Manufacturing method of nickel-based alloy tube |
| CN106552820A (en) * | 2016-12-02 | 2017-04-05 | 河南千王钎具有限责任公司 | The preparation method of hexagon cored steel |
| CN109365534A (en) * | 2018-10-16 | 2019-02-22 | 无锡欣鼎金属制品有限公司 | A kind of hot-puncturing process technique of alloy |
| CN114558891A (en) * | 2022-03-04 | 2022-05-31 | 贵州捷盛钻具股份有限公司 | Hot rolling method of hollow steel for drill rod, hollow steel and hot rolling mill |
-
1993
- 1993-07-03 CN CN 93107895 patent/CN1097153A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317087C (en) * | 2002-08-19 | 2007-05-23 | 李明锁 | Technology for producing hollow steel by hot squeeze method |
| CN103212578A (en) * | 2012-01-20 | 2013-07-24 | 贵阳捷盛科技实业发展有限公司 | Finishing rolling method and device of oblique axial rolling cored steel |
| CN102974615A (en) * | 2012-11-08 | 2013-03-20 | 聊城市开发区全运钢管制造有限公司 | Rolling process method of punched lining core of steel rod |
| CN103706640A (en) * | 2013-12-31 | 2014-04-09 | 常州中钢精密锻材有限公司 | Manufacturing method of nickel-based alloy tube |
| CN106552820A (en) * | 2016-12-02 | 2017-04-05 | 河南千王钎具有限责任公司 | The preparation method of hexagon cored steel |
| CN109365534A (en) * | 2018-10-16 | 2019-02-22 | 无锡欣鼎金属制品有限公司 | A kind of hot-puncturing process technique of alloy |
| CN114558891A (en) * | 2022-03-04 | 2022-05-31 | 贵州捷盛钻具股份有限公司 | Hot rolling method of hollow steel for drill rod, hollow steel and hot rolling mill |
| CN114558891B (en) * | 2022-03-04 | 2024-05-24 | 贵州捷盛钻具股份有限公司 | Hollow steel hot rolling method for drill rod, hollow steel and hot rolling mill |
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