CN102744582A - Machining method for bearing seat of continuous casting machine - Google Patents
Machining method for bearing seat of continuous casting machine Download PDFInfo
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- CN102744582A CN102744582A CN2012102792241A CN201210279224A CN102744582A CN 102744582 A CN102744582 A CN 102744582A CN 2012102792241 A CN2012102792241 A CN 2012102792241A CN 201210279224 A CN201210279224 A CN 201210279224A CN 102744582 A CN102744582 A CN 102744582A
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Abstract
The invention relates to a machining method for a bearing seat of a continuous casting machine. The machining method includes: conducting rough milling of a blank, rough turning of an inner hole, milling of a water cooling grooveand drilling of water holes on a bearing seat body, removing and polishing burrs of the water cooling groove and the water holes, feeding the bearing seat body to a high-temperature furnace and heating for 4 hours, keeping the temperature of the bearing seat body at 120-150 DEG C, and finally entering a welding procedure; welding; adopting manual argon arc welding to weld a stainless steel cover plate in sealing mode, and keeping warm; fine grinding the front plane and the back plane of the bearing seat body on a grinder to the drawing size, then reference grinding the bottom face of the bearing seat body by using a clamp,with the back plane as the reference, and controlling verticalities between the front plane and the bottom face and between the back plane and the bottom face within a range of +/-0.05mm; adopting a machining method of linear cutting to machine a keyway on the bottom face, then controlling the central height and the degree of symmetry through the clamp, with the keyway on the bottom face as a reference, and reversing allowance after half-finish-turning; and finally, finish turning the inner hole of the bearing seat body to the drawing size.
Description
The application divides an application, the application number of original application: 201110065201.6, and the applying date: 2011-3-18, invention and created name: " conticaster bearing base processing method ".
Technical field
The present invention relates to the technical field of bearing base processing method, specifically is a kind of water-cooled conticaster bearing base processing method.
Background technology
Continuously be cast into production process to high-temperature molten steel and be called continuous casting steel machine with certain section configuration and certain size specification strand.
Accomplish the required equipment of this process the continuous casting complete set of equipments.The mechanical-electrical-hydraulic integration that waters steel equipment, conticaster body equipment, cutting zone equipment, dummy bar collection and conveying equipment has constituted continuous casting steel machine core position equipment, is called conticaster traditionally.
Surface temperature is higher during conticaster work, adopts common bearing block to use.Must adopt the water cooled bearing seat, existing conticaster bearing block manufacture craft is complicated, service life is shorter, causes production and maintenance cost higher.
Summary of the invention
The technical problem that the present invention will solve provides long conticaster bearing base processing method in a kind of simple in structure, service life.
In order to solve the problems of the technologies described above; The invention provides a kind of conticaster bearing base processing method; Said conticaster bearing block comprises: the bearing block body; The top end face of bearing block body is an arc surface, and this arc surface is provided with water-cooling groove, and this water-cooling groove outside is connected to the stainless steel cover plate through argon arc welding seal weld; The bottom of bearing block body is provided with inlet opening and the apopore that is communicated with the water-cooling groove of said arc surface both sides respectively.
Above-mentioned conticaster bearing base processing method comprises:
A, to the bearing block body carry out successively that blank is rough milled, rough turn endoporus, mill water-cooling groove, creep into water hole and apopore after; Remove polishing water-cooling groove, water hole burr; Then the bearing block body is sent into high temperature furnace heating 3-5 hour; And the temperature of retainer shaft bearing body is 120～150 ℃, gets into welding procedure at last;
B, welding procedure: bearing block adopts the said stainless steel cover plate of manual argon arc welding sealing welding, advances stove insulation 3～4 hours then;
Finish grind on grinding machine to scheming paper size on the forward and backward plane of C, bearing block body, is the bottom surface of benchmark mill bearing block body through anchor clamps with said frontal plane or back plane then, be controlled at the perpendicularity of forward and backward plane and bottom surface ± the 0.05mm scope in.
Adopting the processing method of line cutting to process the keyway on the said bottom surface, is benchmark with the bottom surface keyway then, comes the center height and the symmetry of Control Shaft bearing body through anchor clamps, and after half finish turning, reserves surplus; At last, the endoporus of finish turning bearing block body is to scheming paper size.
After creeping into water hole and apopore, use air pump, bar magnet to remove residual iron filings, adopt sander to remove burr, clean then, antirust processing.
Further, the both sides of the edge of said stainless steel cover plate and said water-cooling groove are through the groove welding, to guarantee firm welding and service life.
Further, the central portion of said stainless steel cover plate is connected through a plurality of plug weldings with the central lug boss of said water-cooling groove, to guarantee firm welding and service life.
Technique scheme of the present invention is compared prior art and is had the following advantages: in the conticaster bearing block of the present invention; Adopt the water-cooling groove on stainless steel cover plate and the bearing block body to weld, have long and characteristic of simple structure of firm welding, service life through the argon arc welding sealing.
Description of drawings
For content of the present invention is more clearly understood, below basis specific embodiment and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is the structural representation of the conticaster bearing block among the embodiment;
Fig. 2 is that the D of Fig. 1 is to view;
Fig. 3 is the A-A cross-sectional view of Fig. 1.
The specific embodiment
See Fig. 1-3, the conticaster bearing block of present embodiment comprises: bearing block body 1, the top end face of bearing block body 1 are arc surface 1-1, and this arc surface 1-1 is provided with water-cooling groove 2, and this manually black electrode argon arc welding seal weld in water-cooling groove 2 outsides is connected to stainless steel cover plate 4; The bottom of bearing block body 1 is provided with inlet opening 1-2 and the apopore 1-3 that is communicated with the water-cooling groove 2 of said arc surface 1-1 both sides respectively.
The both sides of the edge of said stainless steel cover plate 4 and said water-cooling groove 2 are through the groove welding.
The lug boss of the central authorities on the groove width of the central portion on the plate of said stainless steel cover plate 4 is wide and said water-cooling groove 2 is connected through a plurality of plug weldings 3.
Above-mentioned conticaster bearing base processing method comprises:
From the beginning of getting the raw materials ready between equipment cart, strict control roughing surplus is rough milled, rough turn endoporus, is circulated to welding shop after milling the circular arc water-cooling groove, bore the water hole and removing polishing water-cooling groove, water hole burr blank through metalworking workshop.
Bearing block advanced high temperature furnace heating 4 hours before the soldering stainless steel plate; And the temperature of retainer shaft bearing body is 120～150 ℃; The welding of employing manual argon arc welding, welding rod is selected E5015 or E309 for use, has guaranteed all even attractive in appearance of weld seam; Laggard stove insulation 3～4 hours is accomplished in welding, prevents that bearing block is because of cooling off too fast the cracking.
For the forward and backward plane that guarantees the bearing block body and the perpendicularity of bottom surface; On grinding machine, finish grind the forward and backward plane of bearing block to scheming paper size earlier; Then through before the anchor clamps, one of back plane is for benchmark grinds the bottom surface, the perpendicularity of forward and backward plane and bottom surface be controlled at ± the 0.02mm scope in.
Simultaneously, adopted the processing method of line cutting for the machining accuracy of the bottom surface keyway that guarantees the bearing block body.Through being benchmark with the bottom surface keyway, come the center height and the symmetry of Control Shaft bearing body through anchor clamps again, and reserve surplus after half finish turning, the finish turning endoporus is to scheming paper size.
Finish turning finishes, and adopts Japan (Mitutoyo) three rich digital display altimeters to detect, retainer shaft bearing center high with symmetry in ± 0.02mm scope, and every bearing block all pass through steel seal and numbers the records tests data.
Special-purpose drill jig is adopted in hole, bearing block plane, in accurate positioning, assurance precision, has improved speed of production again.
After boring finishes, use air pump, bar magnet to remove residual iron filings, adopt Germany's (Bosch) Bosch sander to remove burr, carry out the hydraulic pressure leakage test by technological requirement, and make inspection record, clean then, antirust processing is until finished product, vanning at last.
Roller shell production begins from rough forging, through normalized treatment and hardness, chemical analysis are provided and mechanical performance report and coupon qualified after rough turn blank, and carry out ultrasonic examination.Detecting and carry out rough turn processing after qualified, is benchmark with the cylindrical, bores boring mesopore and monolateral made allowance, modifier treatment afterwards.And earlier coupon is processed, detect and can begin product is processed after qualified.
Two ends, top centering, car goes out the built-up welding groove, in strict accordance with bead-welding technology, selects qualified welding wire and solder flux for use, detects and record data, to guarantee cladding layer chemical composition and size.
Temper after the built-up welding detects and guarantees surfacing hardness oneself reaches drawing requirement.
Stainless steel cover plate 4 adopts the 0Cr18Ni stainless steel, and bearing block body 1 adopts Q235, Q345B or Q345D carbon steel.The welding of 0Cr18Ni stainless steel and Q235, Q345B or Q345D carbon steel belongs to the dissimilar steel welding, and the stainless weldability of 0Cr18Ni is relatively poor, and crack defect appears in welding point easily.
In order to obtain flawless welding point, should avoid the inconsistency of welding point melt run tissue and weld metal as far as possible, make 0Cr18Ni stainless steel one side not have significant dilution phenomenon, on technology, taked following measure:
1), in order to reduce the welding deformation of member as far as possible, taked the manual electric arc welding methods of two electric welder's symmetries welding, welding rod is selected E5015 (or E309) for use, the Cr equivalent of weld metal is 5%～6%, have the good mechanical performance after the tempered processing.
2), preheat temperature and interlayer temperature: the control of weld preheating and interlayer temperature is to reducing the certain influence that is formed with of crackle.Preheat temperature is too high, can cause the cooling velocity of weld seam slack-off, and what might cause welding point grain boundary carbide separates out and form ferritic structure, reduces the impact flexibility of joint widely.Preheat temperature is low excessively, does not then have the effect of preheating, can't prevent the formation of crackle.The preheat temperature and the interlayer temperature of 0Cr18Ni stainless steel and Q235, Q345B or the welding of Q345D carbon steel will be controlled at 150～300 ℃.
3), postwelding temperature controlling and tempering heat treatment: postwelding must slowly cool to 100～150 ℃, and insulation 0.5～1h makes the tissue of welding point all change martensite into, and the tempering that could heat up is subsequently heat-treated.Temperature should be controlled in 700～730 ℃ of scopes, and temperature retention time is at 4～5h.
4), operating procedure: thick for preventing that stainless steel from welding a side crystal, produce embrittlement and crackle, also to take following technological measure: (1), select little heat input, little welding current, speed of welding faster for use.(2) adopt short arc welding, electric arc is partial to the base metal of carbon steel side slightly, makes the two base metals uniformity that is heated.(3) owing to need multilayer welding, following one weld seam of weldering after preceding one deck weld seam is cooled to 200～300 ℃.(4) postwelding carries out slow cooling.Concrete welding condition is selected like following table:
Obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not to be qualification to embodiment of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (1)
1. conticaster bearing base processing method, it is characterized in that: said conticaster bearing block comprises: bearing block body, the top end face of bearing block body are arc surface, and this arc surface is provided with water-cooling groove, this water-cooling groove outside seal weld is connected to the stainless steel cover plate; The bottom of bearing block body is provided with inlet opening and the apopore that is communicated with the water-cooling groove of said arc surface both sides respectively;
Above-mentioned conticaster bearing base processing method comprises:
A, to the bearing block body carry out successively that blank is rough milled, rough turn endoporus, mill water-cooling groove, creep into water hole and apopore after; Remove polishing water-cooling groove, water hole burr; Then the bearing block body is sent into high temperature furnace heating 3-5 hour; And the temperature of retainer shaft bearing body is 120～150 ℃, gets into welding procedure at last;
B, welding procedure: adopt manual argon arc welding on said bearing block body, to seal the said stainless steel cover plate of welding, advance stove insulation 3～4 hours then;
Finish grind on grinding machine to scheming paper size on the forward and backward plane of C, bearing block body, is the bottom surface of benchmark mill bearing block body through anchor clamps with said frontal plane or back plane then, be controlled at the perpendicularity of forward and backward plane and bottom surface ± the 0.05mm scope in;
Adopting the processing method of line cutting to process the keyway on the said bottom surface, is benchmark with the bottom surface keyway then, comes the center height and the symmetry of Control Shaft bearing body through anchor clamps, and after half finish turning, reserves surplus; At last, the endoporus of finish turning bearing block body is to scheming paper size;
The both sides of the edge of said stainless steel cover plate and said water-cooling groove are through the groove welding;
The wide central portion of the plate of said stainless steel cover plate is connected through a plurality of plug weldings with the lug boss of the groove width central authorities of said water-cooling groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210279224.1A CN102744582B (en) | 2011-03-18 | 2011-03-18 | Machining method for bearing seat of continuous casting machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210279224.1A CN102744582B (en) | 2011-03-18 | 2011-03-18 | Machining method for bearing seat of continuous casting machine |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110065201A Division CN102152075B (en) | 2011-03-18 | 2011-03-18 | Method for processing bearing pedestal of continuous casting machine |
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| CN102744582A true CN102744582A (en) | 2012-10-24 |
| CN102744582B CN102744582B (en) | 2014-05-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883626A (en) * | 2012-12-24 | 2014-06-25 | 边仁杰 | Water cooling bearing pedestal having thermal insulation layer |
| CN111299770A (en) * | 2020-03-30 | 2020-06-19 | 中国五冶集团有限公司 | Welding process for welding stainless steel with thickness of 2mm to end part of joint of suspended track beam |
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| US5649889A (en) * | 1994-10-06 | 1997-07-22 | Bethlehem Steel Corporation | Stress alleviating guide roll for high temperature applications |
| CN101392801A (en) * | 2008-06-17 | 2009-03-25 | 王登科 | Method for manufacturing rolling bearing seat by adopting welding process |
| CN101653855A (en) * | 2009-08-12 | 2010-02-24 | 西安向阳航天材料股份有限公司 | Method for welding composited tube at bonding interface of carbon steel/stainless steel machinery |
| CN101956764A (en) * | 2010-08-18 | 2011-01-26 | 江苏龙达传动有限公司 | Bearing pedestal with cooling water passages |
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2011
- 2011-03-18 CN CN201210279224.1A patent/CN102744582B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2813764A (en) * | 1954-06-28 | 1957-11-19 | Gen Motors Corp | Journal box |
| BE861366A (en) * | 1976-12-10 | 1978-03-16 | Voest Ag | CASTING BAR GUIDE ROLLER FOR CONTINUOUS CASTING INSTALLATION |
| US5649889A (en) * | 1994-10-06 | 1997-07-22 | Bethlehem Steel Corporation | Stress alleviating guide roll for high temperature applications |
| CN101392801A (en) * | 2008-06-17 | 2009-03-25 | 王登科 | Method for manufacturing rolling bearing seat by adopting welding process |
| CN101653855A (en) * | 2009-08-12 | 2010-02-24 | 西安向阳航天材料股份有限公司 | Method for welding composited tube at bonding interface of carbon steel/stainless steel machinery |
| CN101956764A (en) * | 2010-08-18 | 2011-01-26 | 江苏龙达传动有限公司 | Bearing pedestal with cooling water passages |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883626A (en) * | 2012-12-24 | 2014-06-25 | 边仁杰 | Water cooling bearing pedestal having thermal insulation layer |
| CN111299770A (en) * | 2020-03-30 | 2020-06-19 | 中国五冶集团有限公司 | Welding process for welding stainless steel with thickness of 2mm to end part of joint of suspended track beam |
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| CN102744582B (en) | 2014-05-28 |
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