CN101024229A - Continuous casting, continuous solling production method and apparatus for stainless steel seamless composite pipe - Google Patents
Continuous casting, continuous solling production method and apparatus for stainless steel seamless composite pipe Download PDFInfo
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- CN101024229A CN101024229A CN 200610008109 CN200610008109A CN101024229A CN 101024229 A CN101024229 A CN 101024229A CN 200610008109 CN200610008109 CN 200610008109 CN 200610008109 A CN200610008109 A CN 200610008109A CN 101024229 A CN101024229 A CN 101024229A
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Abstract
The invention relates to stainless steel seamless composite tube continuous casting tandem rolling producing method and device. Its features are that it uses two parallel vertical type hollow bloom continuous casting machines to directly cast out stainless steel composite hollow bloom, cut the high temperature tube blank into given size, and put into sloping bottom die casting furnace to adjust temperature; then the tube blank is taken out to sent into roller trio planet skew rolling mill, tension reducing mill, sizing mill to form finished tube; the finished tube is processed cooling, strengthening, scaling, packing. The invention can shorten production flow, reduce device investment, save energy sources, and increase production efficiency and steel tube rolling quality.
Description
Technical field
The present invention relates to a kind of stainless steel jointless multiple tube continuous casting and tandem rolling production method and equipment, it belongs to a kind of near net shape continuous casting continuous rolling technology in the field of metallurgy different metal seamless multiple tube production technology.The present invention is characterised in that and adopts the continuous casting composite hollow pipe blank, realizes online insulation and soaking, then pipe is directly sent into manufacture a finished product the continuously process of seamless multiple tube of three-roller planetary skew rolling mill, stretch-reducing mill, sizing mill.Adopt this method can save solid billet perforation process and twice blank heating, finally realize the near net shape continuous casting tandem rolling that seamless composite steel tube is produced.
Technical background
This particulate metal material of stainless steel is because of it has high strength, corrosion-resistant and beautiful gloss is widely used in every field such as production, life.And different growth of domestic and international market demand day, it is fewer and feweri to produce the required rare metal nickel of stainless steel, chromium, titanium, its price is also more and more expensive, this makes stainless production and application be subjected to great restriction, for solving this contradiction, people begin stainless composite is studied and explored.The stainless steel clad plate that present some application occurs; band; pipe; under the background of this market, produce; but up to now; see stainless steel composite material in market still few in number; especially the stainless steel jointless multiple tube almost be can not see; one of its major reason is that the production technology of seamless multiple tube is that difficulty is complicated again; though several new methods appear in production field in recent years; as centrifugal casting; the machinery welding method; disposable core bar method and spray to cast method; can produce the stainless steel jointless multiple tube; but there is common shortcoming in these existing production methods: promptly the technological process of production is interrupted; the manual operations operation is many; production efficiency is low; the cost height, and be difficult to realize serialization; scale and automated production.
Summary of the invention
In order to overcome the shortcoming and defect of original production technology, the object of the present invention is to provide a kind of use continuous casting composite hollow pipe blank, need not heat, need not bore a hole, directly send into the three-roller planetary skew rolling mill and be rolled extension, become the production method and the corollary equipment of seamless multiple tube again through stretch-reducing mill, sizing mill finish rolling.
The objective of the invention is to realize by following technical measures:
A kind of stainless steel jointless composite tube production method, be with stainless steel water 21 and low-carbon (LC) molten steel 29, by a vertical casting machine that is together in series and forms by 2-3 platform crystallizer, cast out the compound seamless composite hollow pipe blank of single or double, promptly need not heat, also not need perforation, carry out soaking and temperature adjustment in the wedged bottom holding furnace 3 but directly send into, then pipe is taken out by core bar insertion machine 4 water-cooled core bar 60 is inserted pipe, and together send into the three-roller planetary skew rolling mill and extend rolling.Pipe in the heavy reduction rolling process with intensification 40-50 degree centigrade, this makes waste official enter the finish rolling operation and does not need to heat before again, can directly send into stretch-reducing mill 6 and sizing mill 7 carries out finish rolling, become the hot-rolled finished product steel pipe after the hollow forging finish rolling, after cooling, aligning, scale, tack, nondestructive inspection and the water pressure test, pack bundling again.This technological process of production is: stainless steel water 21+ low-carbon (LC) molten steel 29 → hollow bloom conticaster 1 → rollgang 2 → wedged bottom holding furnace 3 → core bar insertion machine 4 → three-roller planetary skew rolling mill 5 → stretch-reducing mill 6 → sizing mill 7 → tube pulling machine 8 → chain-type cooling bed 9 → cross-roll straightening machine 10 → finished product roller-way 11 → cutting machine 12 → chamfering machine 13 → flaw detector 14 → hydrostatic testing machine 15 → baler 16.
A kind of stainless steel jointless multiple tube continuous casting and rolling production equipment is characterized in that core bar insertion machine 4, three-roller planetary skew rolling mill 5, stretch-reducing mill 6, sizing mill 7, drawbench 8, chain-type cooling bed 9, straightener 10, finished product roller-way 11, pipe cutting machine 12, chamfering machine 13, defectoscope 14, hydrostatic testing machine 15, baler 16 that continuous casting installation for casting is vertically arranged by the rollgang 2 of two vertical composite hollow pipe blank conticasters of installing side by side 1, two parallel installations, two symmetrically arranged soaking pits 3 and separate unit form.Wherein:
A, vertical composite hollow pipe blank conticaster 1 are made up of interior crystallizer 18, last crystallizer 25, following crystallizer 33, dummy ingot cutting car 36, upset roller-way 42 5 equipment components.Wherein interior crystallizer 18, and vibrator 19 and cooling water outlet and inlet 20 have been installed in the upper end, and Lower Half is inserted and gone up crystallizer 25 and following crystallizer 33.Upside at last crystallizer 25 is provided with steel ladle 22 and two top casting grooves 23 on two platforms, and downside has been installed last carry-over pinch rolls 26 and last spray equipment 27; Following crystallizer 33 upsides are provided with the steel ladle 30 and the groove 31 of casting down under two platforms, and downside has also been installed time carry-over pinch rolls 34 and following spray equipment 35; Be provided with dummy ingot cutting car 36 below following carry-over pinch rolls, cutter 37, pinch roll 38, binding clasp 39 have been installed on it, dummy ingot cutting car 36 can upper and lower lifting under lowering or hoisting gear 40 pullings; Be provided with upset roller-way 42 at dummy ingot cutting car downside, its right side is a rollgang 2, and the left side is to fetch and deliver roller-way 43 and dummy bar 44.
B, three-roller planetary skew rolling mill 5 are made up of gear 59, rotary frame 52, water-cooled core bar 60 3 parts.These milling train characteristics are to be driven by two power transmission shaft A and B, and wherein final drive shaft A does planetary rotation thereby drive three collars around the rolled piece center by master bevel gear group 50, main straight-tooth wheels 51 driven rotary frames 52; Counter drive shaft B drives three rolls around axle center rotation separately by secondary bevel gear group 55, secondary straight-tooth wheels 56, planet straight-tooth wheels 57, planetary bevel gear group 58; The front end of water-cooled core bar 60 is installed with core print 61, and the rear end is fixed on the core bar insertion machine 4.The water-cooled core bar is pushing away pipe and it is being sent in the rotation pass of three-roller planetary skew rolling mill during tube rolling.Gear 59 is fixed on the support, and rotary frame 52 outer rim tracks have support wheel to support.
C, wedged bottom holding furnace 3 are to be made of pipe riser 48, oven body part 3, shelves pipe device 49, and wherein oven body part is made of refractory material 45, heating 46, oblique orbit 47 and import and export plate washer; Pipe riser 48 is installed in holding furnace import department, and its effect is that the high temperature pipe platform on the rollgang 2 is worked the holding furnace of packing into; Shelves pipe device 49 is located at the exit of stove, and its effect is the pipe shelves in the stove to be lived and need emit one by one by producing.Because this stove adopts electrothermal method to adjust the pipe temperature,, and can make that to be full of the inert gas shielding pipe in the stove not oxidated so holding furnace can seal.
Advantage of the present invention
1, because this conticaster 1 is with the use continuously that is together in series of two upper and lower vertically arranged outer crystallizers 25 and interior crystallizer 18 of 33 usefulness, so it can produce interior composite hollow pipe blank, can also produce compound hollow bloom outward; If increase an outer crystallizer again, promptly use three crystallizers to work continuously, can also produce two-sided composite hollow pipe blank, use this continuous casting composite hollow pipe blank just can continuously produce the stainless steel jointless multiple tube.
2, because this method uses hollow bloom to produce the stainless steel jointless multiple tube, so production process is saved solid billet perforation process and twice blank heating in the traditional handicraft, this not only shortens production procedure, minimizing equipment input, also saved the energy, reduce production cost, also realized the near net shape continuous casting tandem rolling of seamless steel tube production.
3, because the structure and the kinetic characteristic of three-roller planetary oblique milling, determine its rolling accuracy higher (wall thickness tolerance can reach 5%), lengthening coefficient very big (the single-orifice type lengthening coefficient can reach more than 10), therefore the drafts of one three rod planetary cross-mill is equivalent to the drafts of the unsteady core bar tandem mill of 6-8 frame, this reduces the equipment input, technological process is shortened, and has also saved a large amount of core bars that float simultaneously.In addition because to extend rolling drafts big, make rolled piece in the operation of rolling intensification 40-50 degree centigrade, this makes hollow forging not need to heat before entering finish rolling again, has therefore saved the energy, has reduced the oxidation loss of METAL HEATING PROCESS process.
4, because three rolls of three rod planetary cross-mills, promptly around the revolution of rolled piece center, again around the axle center autobiography, when can making rolled piece only do under given conditions, two kinds of motions extend axially and motion without spin, these characteristics make pipe extend breaking down and hollow forging finish rolling two procedures realizes online tandem rolling, have therefore improved the rolling quality of milling train production efficiency and steel pipe.
5, the unsteady core bar of traditional pipe mill moves with rolled piece, so core bar length must satisfy waste length of tube, and this just makes tube rolling length be subjected to the restriction of core bar length, so become length of tube to have only about 20-30 rice.And the core bar of three rod planetary cross-mills is fixed, as long as its length satisfies pipe length, this can make the weight of pipe increase 2-3 doubly, so tube rolling length also must increase 2-3 doubly.The increase of steel pipe rolling length just means the raising of production efficiency and recovery rate of iron.
6, because the wedged bottom holding furnace of this process using, be soaking and heat supplement for pipe, therefore but not, adopt electrothermal method that two advantages are arranged with the cold conditions blank heating: can relative closure in the first stove, and be full of the stove hall with inert gas and avoid pipe to produce oxidation; It two is that to reduce the production process toxic emission environmental, also helps the automation adjustment of furnace temperature simultaneously.
Description of drawings
Fig. 1, technological process of production schematic diagram of the present invention
Fig. 2, composite hollow pipe blank conticaster structural representation
Fig. 3, wedged bottom holding furnace structure cutaway view
Fig. 4, three-roller planetary skew rolling mill structure cutaway view
Among the figure: 1, hollow bloom conticaster 2, rollgang 3, wedged bottom holding furnace 4, core bar insertion machine 5, three-roller planetary skew rolling mill 6, stretch-reducing mill 7, sizing mill 8, tube pulling machine 9, chain-type cooling bed 10, cross-roll straightening machine 11, finished product roller-way 12, cutting machine 13, chamfering machine 14, flaw detector 15, hydrostatic testing machine 16, baler 17, finished product warehouse-in 18, interior crystallizer 19, vibrator 20, cooling water outlet and inlet 21, stainless steel water 22, last steel ladle 23, top casting groove 24, last tundish 25, last crystallizer 26, last carry-over pinch rolls 27, last spray equipment 28, stainless steel pipe 29, low-carbon (LC) molten steel 30, following steel ladle 31, under the groove 32 of casting, following tundish 33, following crystallizer 34, following carry-over pinch rolls 35, following spray equipment 36, dummy ingot cutting car 37, cutter 38, pinch roll 39, binding clasp 40, lowering or hoisting gear 41, composite pipe blank 42, upset roller-way 43, fetch and deliver roller-way 44, dummy bar 45, refractory material 46, heating 47, oblique orbit 48, pipe riser 49, shelves pipe device 50, master bevel gear group 51, main straight-tooth wheels 52, rotary frame 53, roll mandrel 54, cone-shaped roll 55, secondary bevel gear group 56, secondary straight-tooth wheels 57, planet straight-tooth wheels 58, planetary bevel gear group 59, gear 60, water-cooled core bar 61, core print 62, the guide and guard pipe
See accompanying drawing 1
A kind of stainless steel jointless composite tube production method is by pipe continuous casting, steel pipe tandem rolling, becomes three ones of pipe finishing Be grouped into, wherein continuous casting partly is by two hollow bloom conticasters 1 of installing side by side and 1a, rollgang 2 and 2a, wedged bottom holding furnace 3 and 3a form; The steel pipe tandem rolling partly be by core bar insertion machine 4 arranged in a straight line, Three-roll planetary mill 5, stretch-reducing mill 6, sizing mill 7 form; Become the pipe finishing partly be by tube pulling machine 8, Chain-type cooling bed 9, two cross-roll straightening machines 10 and 10a, finished product roller-way 11, pipe cutting machine 12, two chamfering machines 13 and 13a, two defectoscopes 14 and 14a, two hydrostatic testing machines 15 and 15a, two balers 16 Form with 16a, can put in storage after production tube 17 is checked the weight. If hot finished steel pipe needs further cold rolling processing, then Can directly send into the cold working workshop by finished product roller-way 11a.
See accompanying drawing 2
See accompanying drawing 3
Wedged bottom holding furnace 3 is identical with the 3a structure, all is by refractory material 45, resistive element 46, oblique orbit 47, pipe riser 48, shelves pipe device 49 form. For preventing that pipe insulating process in stove from producing oxidation, this stove is adopted Use the electrothermal method additional heat, and furnace is in closed state, and has all the time indifferent gas to fill protection.
See accompanying drawing 4
Three-roll planetary mill 5 forms this machine by fixed gear transmission case 59 and rotary frame 52 two parts Characteristics are two cover transmission system drives, and wherein the A axle is by master bevel gear group 50, main straight-tooth wheels 51 bands Moving rotary frame 52, thus drive roll mandrel 53 and cone-shaped roll 54 are done planetary revolution around the rolled piece center; The B axle is by secondary bevel gear group 55, secondary straight-tooth wheels 56, planet straight-tooth wheels 57, planetary bevel gear group 58 Drive roll mandrel 53 and cone-shaped roll 54 around the rotation of axle core. In the operation of rolling, water-cooled core bar 60 is pushing away manages Base inserts the rotation pass together with core print 61 and pipe 41 under the guide effect of guide and guard pipe 60, pipe connects Tactile roll is namely nipped and to begin the extension of heavy reduction rolling.
Specific embodiments
1, multiple tube is an example in the stainless steel to produce (to see accompanying drawing), when the beginning strand, earlier dummy bar 44 is sent into crystallizer 25, simultaneously drawing on the dummy bar decided ring and insert down crystallizer 33, after sealing stainless steel water 21 is injected upward crystallizer 25 by last steel ladle 22, top casting groove 23.Stainless steel water is at the strong cold stainless steel pipe that crystallizes into gradually down of inside and outside crystallizer.Draw and decide bar and pipe and under last carry-over pinch rolls 26 tractions, be drawn out crystallizer 25, after the secondary cooling, promptly enter down crystallizer 33, at this moment low-carbon (LC) molten steel 29 is by following steel ladle 30, the groove 31 of casting injects crystallizers 33 down down, the low-carbon (LC) molten steel outside is subjected to the strong cold junction of cooling wall to become the base shell in crystallizer, the inboard contact with the stainless steel pipe cooled off and seam with it, along with the stainless steel pipe moves down, the whole crystallizations of low-carbon (LC) molten steel form composite hollow pipe blank.Composite pipe blank 41 is pulled out by following carry-over pinch rolls 34 and is subjected to enter dummy ingot cutting car 36 after the secondary cooling again, when dummy bar head is crossed cutter, binding clasp 39 is immediately with dummy bar " locking ", at this moment dummy ingot cutting car 36 moves down synchronously with pipe, four cutters 37 start simultaneously, pipe is cut off when cutter rotation 90 is spent, at this moment binding clasp 39 unclamps, pinch roll 38 is sent dummy bar 44 into upset roller-way 42, and dummy ingot cutting car 36 returns next root pipes to be cut such as origin-location under lowering or hoisting gear 40 pullings simultaneously.Dummy bar enters upset and turns over behind the roller-way and turn 90 degrees, and it is served fetch and deliver roller-way 43 left; When next root pipe of cutting, upset roller-way 42 turns over and turn 90 degrees, and pipe is served rollgang 2 to the right.
The composite hollow pipe blank 41 that casts out by conticaster 1, before the condition of high temperature is delivered to holding furnace by rollgang 2, send into wedged bottom holding furnace 3 by pipe riser 48 again, pipe retention period in stove obtains soaking and heat supplement, emit one by one according to mill speed through shelves pipe device 49 then, after coming out of the stove, pipe water-cooled core bar 60 is inserted pipes by core bar insertion machine 4, core is caught up with and is being pushed away the guide and guard pipe 62 that pipe together inserts three rod planetary cross-mills subsequently, the pipe that moves on pushes the rotation pass, and pipe contact roll is promptly nipped.Pipe is subjected to heavy reduction rolling in the three-roller planetary skew rolling mill become hollow forging, because hollow forging only extends axially and without spin, so can directly send into stretch-reducing mill 6 and sizing mill 7 carries out finish rolling.
Be fished pipe after the hollow forging finish rolling, enter finishing procedure subsequently, at first the finish rolling heat pipe is pulled on the chain-type cooling bed 9 by tube pulling machine 8, heat pipe is forced to send into two cross-roll straightening machines 10 respectively and 10a aligns after the cooling being subjected to the spray mode on the cold bed, carry out the nondestructive inspection 14 and the water pressure test 15 by sending to after chamfering machine 13 deburrings again, at last through the baler 16 bundlings warehouse-in of checking the weight.If hot finished steel pipe need carry out cold rolling finishing, then directly deliver to cold rolling workshop and carry out retrofit by rollgang 11a.
2, (see figure 2) is if produce the outer multiple tube of stainless steel jointless, then go up the crystallizer group 25 low-carbon (LC) molten steel that is used for casting, following crystallizer group 33 is used for the stainless steel water of casting, other operation is identical with composite pipe blank in the casting, what cast out like this is the outer composite hollow pipe blank of stainless steel, be rolled and finishing with this pipe, what then produce is the outer multiple tube of stainless steel.
3, (see figure 2) is if produce the two-sided multiple tube of stainless steel jointless, then need set up one group of crystallizer again at last crystallizer 25 upsides, and with interior crystallizer 18 lengthenings, just be together in series and work continuously by three crystallizers in upper, middle and lower, wherein upper and lower crystallizer casting stainless steel water, middle crystallizer casting low-carbon (LC) molten steel, other operation is identical with production single face composite pipe blank, what cast out like this is stainless steel double-sided composite hollow pipe blank, be rolled and finishing with this pipe, what then produce is the two-sided multiple tube of stainless steel jointless.
4, (see figure 2) is if produce the homogenous material seamless steel pipe, only need to use a crystallizer to cast out the hollow bloom of homogenous material, this pipe sent into tandem rolling tube machine is rolled and finishing, just can produce the seamless steel pipe of homogenous material, especially the steel alloy seamless pipe that is fit to the production major diameter and is difficult to bore a hole.
Claims (8)
1, a kind of stainless steel jointless multiple tube continuous casting and tandem rolling production method, it is characterized in that casting in stainless steel water and low-carbon (LC) molten steel in the last crystallizer (25) and following crystallizer (33) of same hollow bloom conticaster (1) by the priority program, thereby cast out stainless steel single or double composite hollow pipe blank, then with the pipe cuttolength, and send into wedged bottom holding furnace (3) by rollgang (2) in the condition of high temperature, pipe takes out finish soaking and temperature adjustment in holding furnace after, by core bar insertion machine (4) water cooling bar (60) is inserted hollow bloom again, subsequently it being sent into three-roller planetary skew rolling mill (5), to carry out the extension of heavy reduction rolling, because the kinetic characteristic of three-roller planetary skew rolling mill (being the PSW milling train), determine its rolled piece only to do and extend axially and motion without spin, event hollow forging after the breaking down directly can be sent into stretch reducing unit (6) and sizing unit (7) carries out finish rolling, the finished product heat pipe is delivered to by tube pulling machine (8) and is subjected to spray to be cooled to normal temperature on the chain-type cooling bed (9) after the finish rolling, sending into cross-roll straightening machine (10) again aligns, aligning back production tube is sent into pipe cutting machine (12) through finished product rollgang (11) and is carried out the scale cutting, all jagged because of cutting the back mouth of pipe, just can send to after needing chamfering machine (13) tack to clear up and carry out the defect detecting test (14) and the water pressure test (15), last bailing warehouse-in; If hot finished steel pipe need carry out the cold-drawn finishing, then directly send into the cold-drawn workshop and carry out retrofit by finished product roller-way (11a); Concrete technological process: stainless steel water+low-carbon (LC) molten steel → hollow bloom conticaster (1) → rollgang (2) → wedged bottom holding furnace (3) → core bar insertion machine (4) → three-roller planetary skew rolling mill (5) → stretch-reducing mill (6) → sizing mill (7) → tube pulling machine (8) → chain-type cooling bed (9) → cross-roll straightening machine (10) → finished product roller-way (11) → cutter (12) → chamfering machine (13) → flaw detector (14) → hydrostatic testing machine (15) → baler (16) → finished product warehouse-in (17).
2, a kind of stainless steel jointless multiple tube continuous casting and tandem rolling production method according to claim 1 is characterized in that using the patent equipment " a kind of stainless steel jointless composite pipe blank conticaster " of inventor's application number " 200620000613 " to produce composite hollow pipe blank; When last crystallizer (25) casting stainless steel water, following crystallizer (33) casting low-carbon (LC) molten steel can cast out interior composite hollow pipe blank; If last crystallizer (25) casting low-carbon (LC) molten steel, following crystallizer (33) casting stainless steel water then can cast out outer composite hollow pipe blank; If use three crystallizers in upper, middle and lower to work continuously, promptly upper and lower crystallizer casting stainless steel water, middle crystallizer casting low-carbon (LC) molten steel also can water and casts out two-sided compound hollow bloom.
3, a kind of stainless steel jointless multiple tube continuous casting and tandem rolling production method according to claim 1, it is characterized in that adopting continuous casting high temperature composite hollow pipe blank, only need soaking and temperature adjustment in holding furnace, promptly send into the tandem rolling tube machine system and be rolled, whole process of production is continuous; Adopt this process to produce the stainless steel jointless multiple tube, promptly saved solid pipe perforation process in the traditional handicraft, reduced blank heating again twice, this not only shortens production procedure, minimizing equipment input, has also saved the energy, has reduced production cost.
4, a kind of stainless steel jointless multiple tube continuous casting and tandem rolling production method according to claim 1, it is rolling to it is characterized in that adopting three-roller planetary skew rolling mill (5) to carry out the extension of pipe, because the movement characteristic and the rolling principle of this milling train determine its rolling accuracy higher (wall thickness tolerance can reach 5%), lengthening coefficient very big (the single-orifice type lengthening coefficient can reach more than 10); This milling train can make rolled piece only do and extend axially and motion without spin under specific rotating condition in addition, and these characteristics make pipe extend breaking down and hollow forging finish rolling two procedures realizes online tandem rolling, and this is very important to improving milling train operating efficiency and steel pipe rolling quality.
5, a kind of stainless steel jointless multiple tube continuous casting and rolling production equipment is characterized in that continuous casting installation for casting is made up of two hollow bloom conticasters (1), rollgang (2), the wedged bottom holding furnace (3) of installation arranged side by side; Core bar insertion machine (4), three-roller planetary skew rolling mill (5), stretch-reducing mill (6), sizing mill (7) that equipment for continuously rolling is installed by single-row straight line are formed; Finishing equipment is made up of drawbench (8), chain-type cooling bed (9), cross-roll straightening machine (10), finished product roller-way (11), cast-cutting saw (12), chamfering machine (13), defectoscope (14), hydrostatic testing machine (15), baler (16); Wherein hollow bloom conticaster (1) is made up of interior crystallizer (18), last crystallizer (25), following crystallizer (33), dummy ingot cutting car (36), upset roller-way (42) five equipment components; Wedged bottom holding furnace (3) is made up of oven body part (3), pipe riser (48), shelves pipe devices (49); Three-roller planetary skew rolling mill (5) is made up of gear (59), rotary frame (52), water-cooled core bar (60) three parts.
6, a kind of stainless steel jointless multiple tube continuous casting and rolling equipment according to claim 5, the interior crystallizer (18) that it is characterized in that described hollow bloom conticaster (1), vibrator (19) and cooling water outlet and inlet (20) are installed in the upper end, and insert in the upper and lower crystallizer bottom; Last crystallizer (25) is installed in tundish (24) bottom, and its upside is provided with steel ladle (22) and top casting groove (23), and downside has been installed last carry-over pinch rolls (26) and last spray equipment (27); Following crystallizer (33) is installed in down tundish (32) bottom, and its upside is provided with down steel ladle (30) and the groove (31) of casting down, and downside has been installed time carry-over pinch rolls (34) and following spray equipment (35); Be provided with dummy ingot cutting car (36) at the following downside of carry-over pinch rolls, cast-cutting saw (37), pinch roll (38), binding clasp (39) have been installed on it, under lowering or hoisting gear (40) traction, dummy ingot cutting car (36) can upper and lower lifting; Be provided with upset roller-way (42) at dummy ingot cutting car downside, its right side is rollgang (2), and the left side is to fetch and deliver roller-way (43) and dummy bar (44).
7, a kind of stainless steel jointless multiple tube continuous casting and rolling equipment according to claim 5, it is characterized in that described wedged bottom holding furnace (3) is to be made of pipe riser (48), oven body part (3), shelves pipe devices (49), wherein oven body part is made up of refractory material (45), heating (46), oblique orbit (47) and import and export plate washer; Pipe riser (48) is installed in holding furnace import department, and its effect is that the high temperature pipe platform on the rollgang (2) is worked the holding furnace of packing into; Shelves pipe devices (49) are located at the exit of stove, and its effect is the pipe shelves in the stove to be lived and need emit one by one by producing; Because this stove adopts electrothermal method to adjust the pipe temperature,, and be full of inert gas in the stove all the time in stove to protect pipe not oxidated so pipe can seal during soaking.
8, a kind of stainless steel jointless multiple tube continuous casting and rolling equipment according to claim 5, the gear (59) that it is characterized in that three-roller planetary skew rolling mill (5) is fixed on the support, and three cone-shaped rolls (54) on the rotary frame (52), promptly do planetary revolution, again around the axle center autobiography around the rolled piece center; By final drive shaft A, counter drive shaft B input, wherein final drive shaft A is by master bevel gear group (50), main straight-tooth wheels (51) driven rotary frames (52) respectively in these two kinds of motions, thereby drives roll mandrel (53) and tapered roll (54) rotates around the rolled piece center; Counter drive shaft B drives roll mandrel (53) around axle center rotation separately by secondary bevel gear group (55), secondary straight-tooth wheels (56), planet straight-tooth wheels (57), planetary bevel gear group (58); When tube rolling, core bar insertion machine (4) is inserted hollow bloom with water-cooled core bar (60) earlier, subsequently pipe is inserted the rotation pass of planetary rolling together with core bar by guide and guard pipe (62), pipe contact roll is promptly nipped, and the extension that begins to carry out heavy reduction is rolling.
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| CN 200610008109 CN101024229A (en) | 2006-02-20 | 2006-02-20 | Continuous casting, continuous solling production method and apparatus for stainless steel seamless composite pipe |
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| CN 200610008109 CN101024229A (en) | 2006-02-20 | 2006-02-20 | Continuous casting, continuous solling production method and apparatus for stainless steel seamless composite pipe |
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2006
- 2006-02-20 CN CN 200610008109 patent/CN101024229A/en active Pending
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