CN102852983B - Continuous caster bearing pedestal and processing method thereof - Google Patents
Continuous caster bearing pedestal and processing method thereof Download PDFInfo
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- CN102852983B CN102852983B CN201210320508.0A CN201210320508A CN102852983B CN 102852983 B CN102852983 B CN 102852983B CN 201210320508 A CN201210320508 A CN 201210320508A CN 102852983 B CN102852983 B CN 102852983B
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Abstract
The present invention relates to a water-cooled continuous caster bearing pedestal and a processing method thereof. The bearing pedestal comprises a bearing pedestal body, wherein the top end surface of the bearing pedestal body is an arc surface, the arc surface is provided with water cooling grooves, the outer side of the water cooling groove is sealedly welded with a stainless steel cover plate, and the bottom of the bearing pedestal body is provided with a water inlet hole and a water outlet hole, wherein the water inlet hole and the water outlet hole are respectively communicated with the water cooling grooves on both sides of the arc surface. The processing method comprises: sequentially carrying out rough milling of the blank, rough machining of the inner hole, milling of the water cooling groove, and drilling of the water hole on the bearing pedestal body, carrying out cleaning burnishing of burr in the water groove and the water hole, feeding into a high temperature furnace to heat for 4 hours, and finally performing a welding process, wherein the welding process comprises: adopting manual argon-arc welding to carry out seal welding on the stainless steel cover plate, and then carrying out thermal insulation. In addition, the front plane and the back plane of the bearing pedestal body are subjected to fine grinding to a drawing size on a grinding machine, and then the bottom surface of the bearing pedestal body is grinded through a clamper by adopting the back plane as a benchmark, wherein verticality of the front plane and the bottom surface, and the verticality of the back plane and the bottom surface are controlled to a range of +-0.05 mm.
Description
The application is divisional application, the application number of original application: 201110065201.6, the applying date: 2011-3-18, invention and created name: " processing method of bearing seat of continuous casting machine ".
Technical field
The present invention relates to the technical field of the processing method of bearing support, specifically a kind of water-cooled continuous casting machine bearing support and processing method thereof.
Background technique
High-temperature molten steel is continuously cast into the production process with certain section configuration and certain size specification strand and is called continuous casting steel machine.
The equipment needed for this process of completing is continuous casting complete sets of equipment.Water steel equipment, casting machine body equipment, cutting zone equipment, dummy bar collects and the mechanical-electrical-hydraulic integration of conveying equipment constitutes continuous casting steel machine core position equipment, is called casting machine traditionally.
During casting machine work, surface temperature is higher, adopts common bearing support to use.Must adopt water-cooled axle-bearing base, existing bearing seat of continuous casting machine preparation process is more complicated, working life is shorter, cause produce and maintenance cost higher.
Summary of the invention
The technical problem to be solved in the present invention is to provide the water-cooled continuous casting machine bearing support and processing method thereof that a kind of structure is simple, working life is longer.
In order to solve the problems of the technologies described above, the invention provides a kind of processing method of water-cooled continuous casting machine bearing support, described bearing seat of continuous casting machine comprises: bearing support body, the top end of bearing support body is arc surface, this arc surface is provided with water-cooling groove, is connected to stainless steel cover plate outside this water-cooling groove through argon arc welding seal weld; The bottom of bearing support body is provided with the water inlet and osculum that are communicated with the water-cooling groove of described arc surface both sides respectively; Stainless steel cover plate adopts 0Cr18Ni stainless steel.
The processing method of above-mentioned bearing seat of continuous casting machine comprises:
A, bearing support body is carried out that blank is rough milled successively, rough turn endoporus, milling water-cooling groove, creep into water hole and osculum after, remove polishing water-cooling groove, water hole burr, then bearing support body is sent into High Temperature Furnaces and heat 4 hours, and the temperature of retainer shaft bearing body is 120 ~ 150 DEG C, finally enters welding sequence;
B, welding sequence: bearing support adopts stainless steel cover plate described in manual argon arc welding seal welding, then enter stove insulation 3 ~ 4 hours;
The forward and backward plane of C, bearing support body is refined to figure paper size on grinding machine, is then the bottom surface of benchmark mill bearing support body with described frontal plane or back plane by fixture, the degree control of forward and backward plane and bottom surface within the scope of ± 0.05mm.
Adopt the processing method of Linear cut to process keyway on described bottom surface, then with bottom surface keyway for benchmark, carry out the high and degree of symmetry in the center of Control Shaft bearing body by fixture, and after half finish turning pre-made allowance; Finally, the endoporus of finish turning bearing support body is to figure paper size.After creeping into water hole and osculum, use air pump, bar magnet to remove residual scrap iron, adopt polisher to remove burr, then carry out cleaning, antirust treatment.
Further, the both sides of the edge of described stainless steel cover plate and described water-cooling groove pass through groove welding, to guarantee firm welding and working life.
Further, the central part of described stainless steel cover plate is connected by multiple plug welding with the lug boss of described water-cooling groove central authorities, to guarantee firm welding and working life.
Technique scheme of the present invention has the following advantages compared to existing technology: in bearing seat of continuous casting machine of the present invention, adopt water-cooling groove on stainless steel cover plate and bearing support body through argon arc welding seal welding, there is firm welding, the working life longer and simple feature of structure.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below basis specific embodiment and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of the bearing seat of continuous casting machine in embodiment;
Fig. 2 is the D direction view of Fig. 1;
Fig. 3 is the A-A cross-sectional view of Fig. 1.
Embodiment
See Fig. 1-3, the bearing seat of continuous casting machine of the present embodiment comprises: bearing support body 1, and the top end of bearing support body 1 is arc surface 1-1, and this arc surface 1-1 is provided with water-cooling groove 2, and outside this water-cooling groove 2, manually black electrode argon arc welding seal weld is connected to stainless steel cover plate 4; The bottom of bearing support body 1 is provided with the water inlet 1-2 and osculum 1-3 that are communicated with the water-cooling groove 2 of described arc surface 1-1 both sides respectively.
Both sides of the edge and the described water-cooling groove 2 of described stainless steel cover plate 4 pass through groove welding.
Central part on the plate of described stainless steel cover plate 4 is wide is connected by multiple plug welding 3 with the lug boss of the central authorities in the groove width of described water-cooling groove 2.
The processing method of above-mentioned bearing seat of continuous casting machine comprises:
From getting the raw materials ready between equipment cart, strict control roughing surplus, through metalworking workshop, blank rough milled, rough turn endoporus, milling circular arc water-cooling groove, bore water hole and remove polishing water-cooling groove, water hole burr after circulate to welding shop.
Bearing support heats 4 hours at the advance High Temperature Furnaces of soldering stainless steel plate, and the temperature of retainer shaft bearing body is 120 ~ 150 DEG C, employing manual argon arc welding welds, selection of electrodes E5015 or E309, ensure that all even attractive in appearance of weld seam, welding laggard stove insulation 3 ~ 4 hours, having prevented bearing support from ftractureing because cooling too fast.
In order to the perpendicularity of the forward and backward plane and bottom surface that ensure bearing support body, first the forward and backward plane of bearing support is refined to figure paper size on grinding machine, then by before fixture, one of back plane grinds bottom surface for benchmark, forward and backward plane and the degree control of bottom surface within the scope of ± 0.02mm.
Simultaneously in order to ensure the machining accuracy of the bottom surface keyway of bearing support body, have employed the processing method of Linear cut.Pass through with bottom surface keyway for benchmark again, carry out the high and degree of symmetry in the center of Control Shaft bearing body by fixture, and pre-made allowance is after half finish turning, finish turning endoporus is to figure paper size.
Finish turning is complete, adopts the rich digital display height instrument of Japan (Mitutoyo) three to detect, retainer shaft bearing center high with degree of symmetry within the scope of ± 0.02mm, and every part bearing support is all through steel seal numbering, records tests data.
Bearing support plane hole adopts Special drilling jig, while accurate positioning, guarantee precision, turn improve speed of production.
After boring terminates, use air pump, bar magnet to remove residual scrap iron, adopt Germany's (Bosch) Bosch polisher to remove burr, carry out water-pressure sealed test by technological requirement, and make inspection record, then carry out cleaning, antirust treatment until finished product, finally case.
Roller shell is produced from rough forging, through normalized treatment and provide hardness, Chemical composition and mechanical property to report and coupon qualified after rough turn blank, and carry out ultrasonic flaw detection.Detect qualified after carry out rough turn processing, take cylindrical as benchmark, bore boring mesopore monolateral made allowance, afterwards quenching with Subsequent tempering.And first coupon is processed, detect qualified after can start to process product.
Two ends, top centering, car goes out to pile weld groove, in strict accordance with bead-welding technology, selects qualified welding wire and solder flux, detects and record data, to guarantee cladding layer chemical composition and size.
Heap postwelding temper, detects and guarantees surfacing hardness oneself reaches drawing requirement.
Stainless steel cover plate 4 adopts 0Cr18Ni stainless steel, and bearing support body 1 adopts Q235, Q345B or Q345D carbon steel.0Cr18Ni stainless steel belongs to different steel weld with welding of Q235, Q345B or Q345D carbon steel, and the stainless weldability of 0Cr18Ni is poor, and welded joint easily occurs crack defect.
In order to obtain flawless welded joint, the inconsistency of welded joint weld interface tissue and weld metal should be avoided as far as possible, making 0Cr18Ni stainless steel side there is no significant dilution phenomenon, technique takes following measures:
1), in order to reduce the welding deformation of component as far as possible, the manual electric arc welding method that two manual arc welder are symmetrically welded is taken, selection of electrodes E5015(or E309), the Cr equivalent of weld metal is 5% ~ 6%, has good mechanical property after tempered process.
2), preheating temperature and interpass temperature: the control of weld preheating and interpass temperature is formed with certain influence to what reduce crackle.Preheating temperature is too high, and the rate of cooling of weld seam can be caused slack-off, likely causes the precipitation of welded joint grain boundary carbide and forms ferritic structure, reducing the impact toughness of joint widely.Preheating temperature is too low, then do not have the effect of preheating, cannot prevent the formation of crackle.The preheating temperature that 0Cr18Ni stainless steel welds with Q235, Q345B or Q345D carbon steel and interpass temperature will control at 150 ~ 300 DEG C.
3), the control of postwelding temperature and tempering heat treatment: postwelding must slowly cool to 100 ~ 150 DEG C, and insulation 0.5 ~ 1h, make the tissue of welded joint all change martensite into, could heat up tempering subsequently, heat-treats.Tempering temperature should control within the scope of 700 ~ 730 DEG C, and holding time is at 4 ~ 5h.
4), operating procedure: for preventing stainless steel welded side crystal thick, producing brittle and crackle, also will take following technological measure: (1), select little heat input, little welding current, faster welding speed.(2) adopt short arc welding, electric arc is slightly partial to base metal of carbon steel side, and two base metals are heated evenly unanimously.(3) due to needs multi-layer welding, after front one deck weld seam is cooled to 200 ~ 300 DEG C, lower one weld seam is welded.(4) postwelding carries out slow cooling.
Concrete welding parameter is selected as following table:
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all mode of executions.And these belong to spirit institute's apparent change of extending out of the present invention or change and are still among protection scope of the present invention.
Claims (1)
1. a processing method for bearing seat of continuous casting machine, its bearing seat of continuous casting machine comprises: bearing support body, and the top end of bearing support body is arc surface, and this arc surface is provided with water-cooling groove, and this water-cooling groove outer side seal is welded with stainless steel cover plate; The bottom of bearing support body is provided with the water inlet and osculum that are communicated with the water-cooling groove of described arc surface both sides respectively; Stainless steel cover plate adopts 0Cr18Ni stainless steel;
It is characterized in that processing method comprises:
A, bearing support body is carried out that blank is rough milled successively, rough turn endoporus, milling water-cooling groove, creep into water hole and osculum after, remove polishing water-cooling groove, water hole burr, then bearing support body is sent into High Temperature Furnaces and heat 4 hours, and the temperature of retainer shaft bearing body is 120 ~ 150 DEG C, finally enters welding sequence;
B, welding sequence: adopt manual argon arc welding stainless steel cover plate described in seal welding on described bearing support body, then enter stove insulation 3 ~ 4 hours;
The forward and backward plane of C, bearing support body is refined to figure paper size on grinding machine, is then the bottom surface of benchmark mill bearing support body with described frontal plane or back plane by fixture, the degree control of forward and backward plane and bottom surface within the scope of ± 0.05mm;
Adopt the processing method of Linear cut to process keyway on described bottom surface, then with bottom surface keyway for benchmark, carry out the high and degree of symmetry in the center of Control Shaft bearing body by fixture, and after half finish turning pre-made allowance; Finally, the endoporus of finish turning bearing support body is to figure paper size;
Both sides of the edge and the described water-cooling groove of described stainless steel cover plate pass through groove welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210320508.0A CN102852983B (en) | 2011-03-18 | 2011-03-18 | Continuous caster bearing pedestal and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210320508.0A CN102852983B (en) | 2011-03-18 | 2011-03-18 | Continuous caster bearing pedestal and processing method thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110065201A Division CN102152075B (en) | 2011-03-18 | 2011-03-18 | Method for processing bearing pedestal of continuous casting machine |
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| Publication Number | Publication Date |
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| CN102852983A CN102852983A (en) | 2013-01-02 |
| CN102852983B true CN102852983B (en) | 2015-01-28 |
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| AT521218A1 (en) * | 2018-05-03 | 2019-11-15 | Primetals Technologies Austria GmbH | Plummer Block |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5649889A (en) * | 1994-10-06 | 1997-07-22 | Bethlehem Steel Corporation | Stress alleviating guide roll for high temperature applications |
| CN1888458A (en) * | 2006-07-17 | 2007-01-03 | 大连三环复合材料技术开发有限公司 | Double-metal solid bearing cage and producing process thereof |
| CN201493458U (en) * | 2009-09-18 | 2010-06-02 | 中冶赛迪工程技术股份有限公司 | Continuous casting machine fan-section water-cooling structure |
| CN101956764A (en) * | 2010-08-18 | 2011-01-26 | 江苏龙达传动有限公司 | Bearing pedestal with cooling water passages |
-
2011
- 2011-03-18 CN CN201210320508.0A patent/CN102852983B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5649889A (en) * | 1994-10-06 | 1997-07-22 | Bethlehem Steel Corporation | Stress alleviating guide roll for high temperature applications |
| CN1888458A (en) * | 2006-07-17 | 2007-01-03 | 大连三环复合材料技术开发有限公司 | Double-metal solid bearing cage and producing process thereof |
| CN201493458U (en) * | 2009-09-18 | 2010-06-02 | 中冶赛迪工程技术股份有限公司 | Continuous casting machine fan-section water-cooling structure |
| CN101956764A (en) * | 2010-08-18 | 2011-01-26 | 江苏龙达传动有限公司 | Bearing pedestal with cooling water passages |
Non-Patent Citations (1)
| Title |
|---|
| 连铸机辊系水冷系统及干油润滑系统分析;罗露;《重型机械》;20100531;第S1卷;232-238页 * |
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