CN1025944C - Centrifugal semi-continuous casting method for pipe and apparatus thereof - Google Patents
Centrifugal semi-continuous casting method for pipe and apparatus thereof Download PDFInfo
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- CN1025944C CN1025944C CN 91108457 CN91108457A CN1025944C CN 1025944 C CN1025944 C CN 1025944C CN 91108457 CN91108457 CN 91108457 CN 91108457 A CN91108457 A CN 91108457A CN 1025944 C CN1025944 C CN 1025944C
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Abstract
The present invention discloses a centrifugal semi-continuous casting method for pipes and an apparatus thereof, which is mainly characterized in that a short metal pipe mould is adopted and rotated; molten metal is cast in the pipe mould under the condition that the pipe mould rotates at a certain rotation speed; after a faucet part of a cast pipe is solidified, the cast pipe is pulled out from the pipe mould at a certain speed, and the molten metal is continuously cast until the cast pipe reaches the required length. The centrifugal semi-continuous casting method for pipes and the apparatus thereof effectively overcome the lamellar segregation and the surface moire of the cast pipe, and enhance the quality of the cast pipe. The present invention has the advantages of short pipe mould, easy processing, convenient replacement and less apparatus investment.
Description
The present invention relates to a kind of centrifugal semi-continuous pipe casting method and centrifugal semi-continuous pipe casting device of metal pipe material.
At present, domestic general top-pour formula semi-continuous pipe casting, be from the top water cooling tube die that directly pours into molten metal, after molten metal condenses in pipe die, with drawing bar and draw-gear tubing is drawn from the pipe die bottom again, along with drawing of tubing constantly pours into molten metal, meet the requirements of length up to tubing.Owing in molten metal, inevitably can have some impurity, when cast, pour into molten metal its impurity in condensation process in pipe die emersion that can make progress earlier, but the molten metal that pours into subsequently can cover the impurity of emersion again, impurity and gas in the molten metal can't be discharged, therefore, the defective that can in tubing, cause pore, slag inclusion and cold shut etc. to be difficult to overcome.
Chinese patent CN87102660A discloses a kind of " method of low-pressure semi-continuous pipe casting ", this method adopts airtight running gate system, make liquid metal in closed container, be warming up to pouring temperature, with compressed-air actuated thrust liquid metal is risen up in the metal mold cavity that is made of inside and outside crystallizer then, crystallization under the operating mode of isolated outside air, removing from mould, and additional liquid metal, finish the continuous casting of tubing.Though this method can reduce oxidation, obtain the smooth tubing of inside and outside wall, air in the liquid metal and impurity still can't be got rid of, and the density of tubing is relatively poor, can not bear higher pressure.
Another Chinese patent CN86107082A discloses a kind of " centre spinning method and belt material mold and foundry goods thereof "; this method is the topped dry powder refractory material of centrifugal pipe die inner surface in rotation; handle through densification; form stable pipe die protective layer; casting metal liquation in having the rotation pipe die of protective layer then; molten metal is subjected to action of centrifugal force in pipe die, along with on the protective layer of pipe die, form tubular cast through cooling.This method has reduced the porosity of foundry goods significantly, and make impurity in the molten metal under action of centrifugal force from foundry goods emersion, thereby improved the mechanical performance of foundry goods, but this method only is suitable for the short tubular part of length is cast, when foundry goods is increased to certain-length, the equipment investment of its pipe die and spun cast pipe will increase substantially, simultaneously, the quality of foundry goods also will descend thereupon, the defective that cold shut or stratified segregation etc. are difficult to overcome occur; Particularly for the casting of tubing, this method has certain limitation, and is difficult to realize.
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art part, a kind of centrifugal semi-continuous pipe casting method and centrifugal semi-continuous pipe casting device are provided, utilize the centrifugal turning effort of pipe die to get rid of the less non-metallic inclusion of proportion in the molten metal, produce the possibility of casting flaw when reducing cast tube, improve the quality of cast tube, and it is good to go out surface quality with the continuous pouring of short tube mould, the tubing that mechanical strength is high.
The present invention is achieved in that
The centrifugal semi-continuous pipe casting method of the present invention adopts the short metal pipe die of water cooling, and make pipe die around self central axis rotation, under the situation of pipe die with certain rotational speed, the molten metal that will be in pouring temperature is poured in the pipe die with certain poring rate, molten metal is subjected to action of centrifugal force and attached on the pipe die inwall in pipe die, and the less non-metallic inclusion of wherein contained proportion since action of centrifugal force emersion molten metal surface prevented from it is condensated into tube wall and causes casting flaw; Regulate cooling water inflow, molten metal is solidified in pipe die, after the bellmouth partial coagulation of cast tube front portion, the cast tube that has solidified is pulled out from pipe die with certain trombone slide speed, along with pulling out of cast tube, continuation is the casting metal liquation in pipe die, and keeps the cast of molten metal and this process sync equalizing of pulling out of cast tube to carry out, and meets the requirements of length up to cast tube.
In order to be used said method, specialized designs of the present invention a kind of centrifugal semi-continuous pipe casting device, described centrifugal semi-continuous pipe casting device is by the pipe die rotating mechanism, reclining device three parts of trombone slide mechanism and insulation bag are formed, described pipe die rotating mechanism is by preceding, rear branching holder, before being installed in, three guide rods and two power between the rear branching holder, the threephase asynchronous that rotating speed is identical is formed, guide rod is evenly arranged at circumferencial direction, preceding supporting base is supported on two rollers, two rollers then are installed on the hood that is fixed together with frame respectively, rear branching holder is installed on the frame by bearing, pipe die and preceding supporting base are installed together, trombone slide mechanism is installed on the guide rod of pipe die rotating mechanism, described trombone slide mechanism is connected with guide rod by slide plate, and slide thereon, but the two halves pipe clamp of folding is installed on slide plate, in order to clamp the inner chamber core of cast tube bellmouth and cast tube bellmouth, the afterbody of pipe clamp is equipped with conduit, turn-take and thrust bearing is connected with anti-between pipe clamp and the conduit, and a slide plate that reciprocatingly slides in can the chute on frame respectively is installed in the two sides of tail of conduit, make conduit break away from rotation status, realize to move back and forth, described trombone slide mechanism by buncher by drive sprocket and chain drive; Verting of insulation bag driven by chain by drive sprocket, and the drive sprocket of the vert drive sprocket and the trombone slide mechanism of insulation bag is installed on the same power transmission shaft, driven by a buncher, carries out to guarantee that the molten metal cast is pulled out synchronously with cast tube.
The effect of the non-metallic inclusion of the present invention in having the eliminating molten iron that de Lavaud process has, because it is shorter than existing de Lavaud process behind the molten iron inflow pipe die along its distance that vertically flows, therefore, effectively overcome " the inclined to one side plate of stratiform " of cast tube, compare then more obvious with metal pattern (cold mould) spun cast pipe especially, because the flow process that molten iron flows in pipe die is short, thereby it is few with the contacted top layer of die wall molten iron dispersed heat, thereby more help alleviating cast tube surface moire, improved the quality of cast tube.
The present invention is short tube mould (the pipe die total length is less than 300 millimeters) owing to what use, therefore, the processing and manufacturing of pipe die and replacing are all simple than existing spun cast pipe, easily, thereby the material of pipe die required to be reduced to ordinary carbon steel or spheroidal graphite cast-iron, the pipe die expense is reduced, and required tube-pulling apparatus that cast tube is taken out from pipe die and the required special equipments such as soldering, polishing and scutching point of soldering pipe die can save the metal pattern spun cast pipe time, thereby equipment investment is greatly reduced, reduce energy resource consumption.As the present invention being used under the satisfactory continuous tapping condition of molten iron temperature, can also save the instrument and the equipment of insulation bag and transportation molten iron.
Below centrifugal semi-continuous pipe casting method of the present invention is elaborated:
The present invention adopts the short metal pipe die of water cooling, its length is less than 300 millimeters, the cross section of pipe die is circular, pipe die adopts ordinary carbon steel, spheroidal graphite cast-iron or copper production, described pipe die is installed on the rotating mechanism of pipe die, under the drive of pipe die rotating mechanism around the rotation of self central axis, under the situation of pipe die with certain rotational speed, the molten metal that will be in pouring temperature is poured in the pipe die with certain poring rate, the pouring temperature of molten metal is 1350 ℃～1380 ℃, metallic solution is subjected to action of centrifugal force and on the inwall attached to pipe die, forms the pipe fitting with certain wall thickness in pipe die; Contained non-metallic inclusion in the molten metal is because its proportion is less, under action of centrifugal force from molten metal emersion, condense on the inner surface of cast tube, thereby prevented from it is condensated in the tube wall, form the cast tube defective; Molten metal under the cooling effect of the water collar outside pipe die in the pipe die begins to solidify, and cooling water adopts soft water, and hydraulic pressure is 3 * 10
5Pa～5 * 10
5Pa.Inflow temperature is lower than 25 ℃; After the bellmouth partial coagulation of cast tube front portion, the cast tube that has solidified is pulled out from pipe die with certain trombone slide speed, and regulate cooling water inflow, the temperature of the cast tube of pulling out is remained between 700 ℃～800 ℃; The wall thickness of cast tube is regulated by the coupling of pulling out between the speed of poring rate and cast tube, and poring rate is regulated by the volume that changes the insulation bag, and the cylinder-packing thickness that promptly changes the insulation bag is realized; Along with pulling out of cast tube, continue the casting metal liquation, and keep the cast and the pulling out synchronously of cast tube of molten metal to carry out by the apparatus for pouring and the trombone slide mechanism of molten metal, can cast out the satisfactory tubing of its length and quality.
Below in conjunction with accompanying drawing centrifugal semi-continuous pipe casting device of the present invention is elaborated:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is a structural representation of the present invention.
Embodiment 1:
As shown in drawings, the present invention has a frame 4, the pipe die rotating mechanism is installed on frame 4, described pipe die rotating mechanism comprises preceding supporting base 5, rear branching holder 11 and be installed in before three guide rods 9 between supporting base 5 and the rear branching holder 11, the pipe die rotating mechanism is by two power, the identical threephase asynchronous 18 of rotating speed is preceding, rear branching holder 5, drive respectively by belt on 11, described three guide rods 9 are evenly arranged at circumferencial direction, preceding supporting base 5 is supported on two rollers 21, two 21 on rollers are installed in respectively on the hood 20 that is fixed together with frame 4, under the tension of gravity and belt, preceding supporting base 5 closely contacts with two rollers 21, rear branching holder 11 is installed on the frame 4 by a radial ball bearing and a thrust bearing, in the front portion of preceding supporting base 5 pipe die 22 is installed, the length of pipe die 22 is 200 millimeters, internal diameter is 70 millimeters, outside at pipe die 22 also is set with water collar 2, water collar 2 is fixed on the hood 20,, do not seal with rubber seal ring between water collar 2 and the pipe die 22 with pipe die 22 rotations; On the guide rod 9 of pipe die rotating mechanism, trombone slide mechanism is installed, described trombone slide mechanism is connected with guide rod 9 by two slide plates 8, but the two halves pipe clamp 7 of folding is installed on slide plate 8, be fixed together with screw rod 26 between slide plate 8 and the pipe clamp 7, pipe clamp 7 rotates with the pipe die rotating mechanism, and can reciprocatingly slide along its guide rod 9, in pipe clamp 7, be equipped with in order to form the core 31 of cast tube bellmouth inner chamber, afterbody at pipe clamp 7 is equipped with conduit 10,30 be connected with anti-turn-taking between pipe clamp 7 and the conduit 10, anti-30 outer ring and the conduit 10 of turn-taking is fixed together, anti-30 the inner hole sleeve of turn-taking is contained on the axle head of pipe clamp 7 afterbodys, and installed thrust bearing 27 thereon, fix with packing ring and nut, described conduit 10 passes the centre bore of rear branching holder 11, both sides at its afterbody also respectively are equipped with a slide plate 28, slide plate 28 can reciprocatingly slide in the chute on the frame 4 29, thereby make conduit 10 break away from rotation status, realize moving back and forth, the pipe clamp 7 of described trombone slide mechanism is driven by drive sprocket 17 and chain 13 by buncher 15, an afterbody that is fixed on conduit 10 of chain 13, the other end is fixed on anti-30 the framework of turn-taking through drive sprocket 17 and jockey sprocket 14, insulation bag 1 is installed in the front portion of pipe die 22, described insulation bag 1 is installed on the frame 4 by the bolster 24 of its both sides, around insulation bag 1, electric heating and thermal insulation device is installed, so that the molten iron in the insulation bag 1 maintains pouring temperature, the longitudinal cross-section of insulation bag 1 is fan-shaped, thereby guarantee that iron flow is consistent all the time in casting process, verting of insulation bag 1 driven by drive sprocket 16 and chain 12, chain 12 is a seal ring cover, the bottom and the chain 12 of insulation bag 1 are fixed together, and chain 12 is walked around drive sprocket 16 and directive wheel 3; Described drive sprocket 16 is installed on the same power transmission shaft 25 with the drive sprocket 17 of trombone slide mechanism, drive by deceleration device by buncher 15, carry out with the cast and the pulling out synchronously of cast tube that guarantee molten metal, the guiding gutter 23 of molten metal is installed between sprue gate that is incubated bag 1 and pipe die 22; The tilt adjustment mechanism 19 of frame 4 also is installed, so that regulate the position of frame 4 at the two ends of frame 4.
Before cast, earlier the pipe clamp 7 of trombone slide mechanism is opened, place pipe clamp 7 with ready made in order to the core 31 that forms cast tube bellmouth inner chamber, there is the core print of a band bead bottom of described core 31, core print is packed in the cannelure of pipe clamp 7, two halves pipe clamp 7 is fastened it by engaging support mechanism; Then, drive drive sprocket 16,17 by buncher 15 again, make pipe clamp 7 and insulation bag 1 be in the position of starting working, promptly insulation bag 1 is in the state of starting working, and trombone slide mechanism then reserves one section idle stroke; During cast, earlier be that 1350 ℃～1380 ℃ molten iron is packed in the electric heating thermal insulation bag 1, and continue it is incubated that the capacity of insulation bag 1 is determined according to the size and the wall thickness of cast tube with temperature; Connect the cooling water of water collar 2, starting motor 18, make pipe die 22 with the rotation of 900 rev/mins rotating speed, restart buncher 15, drive sprocket 16,17 rotates, insulation bag 1 slowly verts under the drive of chain 12, at this moment, because having given, the chain 13 of trombone slide mechanism reserves one section idle stroke, therefore, pipe clamp 7 does not begin to slide, and molten metal is subjected to action of centrifugal force after guiding gutter 23 enters pipe die 22, thereby force non-metallic inclusion emersions from molten metal such as the less slag of wherein contained proportion, bubble, prevented that it from causing defective with fixed attention in tube wall; Because pipe die 22 is subjected to the effect of cooling jacket 2, molten metal cools off very fast in pipe die 22, after the bellmouth partial coagulation of cast tube 6, trombone slide mechanism gives the idle stroke of staying and just in time finishes, chain 13 drives pipe clamp 7 with 1.2 meters/minute speed, cast tube 6 has been coagulated part constantly pulls out from pipe die 7, the wall thickness of the cast tube 6 of pulling out is 3.5 millimeters, simultaneously, also for pouring into follow-up molten iron vacating space in the pipe die 7, so that continue to pour into molten metal, since insulation bag 1 vert and pulling out of cast tube 6 adopts same buncher 15 to drive, therefore, guaranteed that poring rate and trombone slide speed carries out synchronously, this process is continued, can produce the satisfactory tubing of its length.
Embodiment 2:
As shown in drawings, the length of the rotation pipe die 22 of the centrifugal semi-continuous pipe casting device of the present invention is 280 millimeters, and internal diameter is 63 millimeters, and starting motor 18 makes pipe die 22 with the rotation of 900 rev/mins rotating speed; Restart buncher 15, drive sprocket 16,17 rotate, insulation bag 1 slowly verts under the drive of chain 12, with temperature is that 1350 ℃～1380 ℃ molten metal is poured in the pipe die 22, after the bellmouth partial coagulation of cast tube, the idle stroke that trombone slide mechanism reserves finishes, chain 13 drives pipe clamp 7 with 1.0 meters/minute speed, what the part that cast tube 6 has been solidified did not continue pulls out from pipe die 7, the wall thickness of the cast tube 6 of pulling out is 10 millimeters, continue to pour into molten metal, and keep the cast of molten metal and the sync equalizing of pulling out of cast tube 6 to carry out, can cast out the satisfactory tubing of its length.
Claims (9)
1, a kind of centrifugal semi-continuous pipe casting method, adopt the short metal pipe die of water cooling, and make it around self central axis rotation, under the situation of pipe die with certain rotational speed, the molten metal that will be in pouring temperature is poured in the pipe die with certain poring rate, molten metal is subjected to action of centrifugal force and attached on the pipe die inwall in pipe die, regulate cooling water inflow, molten metal is solidified in pipe die, the invention is characterized in, after the bellmouth partial coagulation of cast tube front portion, the cast tube that has solidified is pulled out from pipe die with certain trombone slide speed,, continue the casting metal liquation along with pulling out of cast tube, and keep the cast of molten metal and this process sync equalizing of pulling out of cast tube to carry out, meet the requirements of length up to cast tube.
2, centrifugal semi-continuous pipe casting method according to claim 1 is characterized in that, the pouring temperature of described molten metal is 1350 ℃～1380 ℃.
3, centrifugal semi-continuous pipe casting method according to claim 1 is characterized in that, described poring rate is regulated by the volume that changes the insulation bag.
4, centrifugal semi-continuous pipe casting method according to claim 1 is characterized in that, the hydraulic pressure of cooling water is 3 * 10
5Pa～5 * 10
5Pa, the inflow temperature of cooling water are lower than 25 ℃.
5, centrifugal semi-continuous pipe casting method according to claim 1 is characterized in that, the flow-control of cooling water in the temperature that makes the cast tube of pulling out between 700 ℃～800 ℃.
6, a kind of centrifugal semi-continuous pipe casting device that uses the described method of claim 1, comprise frame (4), be installed in molten metal electric heating thermal insulation bag (1) and water cooling metal pipe die (22) on the frame (4), it is characterized in that, on frame (4), the pipe die rotating mechanism is installed, described pipe die rotating mechanism is by preceding supporting base (5), rear branching holder (11), be installed in three guide rods (9) and two power between preceding supporting base (5) and the rear branching holder (11), the threephase asynchronous that rotating speed is identical (18) is formed, described three guide rods (9) are evenly arranged at circumferencial direction, preceding supporting base (5) is supported on two rollers (21), two rollers (21) are installed in respectively on the hood (20) that is fixed together with frame (4), rear branching holder (11) is installed on the frame (4) by bearing, described pipe die (22) is installed on the supporting base (5), on the guide rod (9) of pipe die rotating mechanism, trombone slide mechanism is installed, described trombone slide mechanism is connected with guide rod (9) by slide plate (8), and slide thereon, at slide plate (8) but on the two halves pipe clamp (7) of folding is installed, afterbody at pipe clamp (7) is equipped with conduit (10), be connected with anti-turn-take (30) between described pipe clamp (7) and the conduit (10), the outer ring and the conduit (10) of anti-turn-take (30) are fixed together, its inner hole sleeve is contained on the axle head of pipe clamp (7) afterbody, and installed thrust bearing (27) thereon, fix with packing ring and nut, described conduit (10) passes the centre bore of rear branching holder (11), a slide plate (28) that can reciprocatingly slide in the chute (29) on the frame (4) respectively is installed in the both sides of its afterbody, and described trombone slide mechanism is driven by drive sprocket (17) and chain (13) by buncher (15); Described insulation bag (1) is installed on the frame (4) by the bolster (24) of its both sides, verting of insulation bag (1) driven by drive sprocket (16) and chain (12), the bottom and the chain (12) of insulation bag (1) are fixed together, described drive sprocket (16) is installed on the same power transmission shaft (25) with the drive sprocket (17) of trombone slide mechanism, is driven through deceleration device by buncher (15).
7, centrifugal semi-continuous pipe casting device according to claim 6 is characterized in that, its longitudinal cross-section of described insulation bag (1) is fan-shaped.
8, centrifugal semi-continuous pipe casting device according to claim 6 is characterized in that, the total length of described pipe die (22) is less than 300 millimeters.
9, centrifugal semi-continuous pipe casting device according to claim 6 is characterized in that, the tilt adjustment mechanism (19) of frame (4) is installed at the two ends of frame (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108457 CN1025944C (en) | 1991-10-29 | 1991-10-29 | Centrifugal semi-continuous casting method for pipe and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108457 CN1025944C (en) | 1991-10-29 | 1991-10-29 | Centrifugal semi-continuous casting method for pipe and apparatus thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1071869A CN1071869A (en) | 1993-05-12 |
| CN1025944C true CN1025944C (en) | 1994-09-21 |
Family
ID=4909312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91108457 Expired - Fee Related CN1025944C (en) | 1991-10-29 | 1991-10-29 | Centrifugal semi-continuous casting method for pipe and apparatus thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025944C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927328A (en) * | 2010-08-19 | 2010-12-29 | 新兴铸管股份有限公司 | Cast tube water cooling system used for centrifugal casting machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042294B (en) * | 2017-03-28 | 2022-06-14 | 营口经济技术开发区爱维尔铸业有限公司 | Centrifugal machine for casting double-disc flange straight pipe and wall-penetrating flange straight pipe |
| CN114603097B (en) * | 2022-03-22 | 2022-11-18 | 南京航空航天大学 | Low-pressure centrifugal continuous casting device and method for metal pipe |
| CN116140601B (en) * | 2023-04-24 | 2023-07-04 | 贵州铝厂有限责任公司 | Aluminum water electrolysis bag lifting vehicle |
-
1991
- 1991-10-29 CN CN 91108457 patent/CN1025944C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927328A (en) * | 2010-08-19 | 2010-12-29 | 新兴铸管股份有限公司 | Cast tube water cooling system used for centrifugal casting machine |
| CN101927328B (en) * | 2010-08-19 | 2011-11-09 | 新兴铸管股份有限公司 | Cast tube water cooling system used for centrifugal casting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1071869A (en) | 1993-05-12 |
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