CN102756249B - 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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- CN102756249B CN102756249B CN201210278633.XA CN201210278633A CN102756249B CN 102756249 B CN102756249 B CN 102756249B CN 201210278633 A CN201210278633 A CN 201210278633A CN 102756249 B CN102756249 B CN 102756249B
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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 groove and drilling of a water hole on a bearing seat body, removing and polishing burrs of a water channel and a water hole, feeding the bearing seat body to a high-temperature furnace and heating for 4 hours, keeping the temperature of the bearing seat body as 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; accurate-grinding a front plane and a back plane of the bearing seat body on a grinder to the drawing size, then using the plane behind a clamp as a standard to grind the bottom face of the bearing seat body, and controlling verticality 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 using the keyway on the bottom face as a standard and controlling the central height and the degree of symmetry through the clamp, 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 is divisional application, the application number of original application: 201110065201.6, the applying date: 2011-3-18, invention and created name: the 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 block, specifically a kind of processing method of water-cooled continuous casting machine bearing block.
Background technology
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.
Complete the required equipment of this process 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 formed continuous casting steel machine core position equipment, is called traditionally conticaster.
During conticaster work, surface temperature is higher, adopts common bearing block to use.Must adopt water cooled bearing seat, existing bearing seat of continuous casting machine manufacture craft is more complicated, service life is shorter, causes production and maintenance cost higher.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of processing method of simple in structure, the bearing seat of continuous casting machine that grows service life.
In order to solve the problems of the technologies described above, the invention provides a kind of processing method of bearing seat of continuous casting machine, described bearing seat of continuous casting machine comprises: bearing block body, the top end face of bearing block body is arc surface, this arc surface is provided with water-cooling groove, and this water-cooling groove outside is connected to stainless steel cover plate through argon arc welding seal weld; The bottom of bearing block body is provided with the inlet opening and the apopore that are communicated with the water-cooling groove of described arc surface both sides respectively.
The processing method of above-mentioned bearing seat of continuous casting machine comprises:
A, bearing block body is carried out successively that blank is rough milled, rough turn endoporus, milling water-cooling groove, crept into after water hole and apopore, remove polishing water-cooling groove, water hole burr, then bearing block body is sent into high temperature furnace heating 3-5 hour, and the temperature of retainer shaft bearing body is 120～150 ℃, finally enters welding procedure;
B, welding procedure: stainless steel cover plate described in bearing block employing manual argon arc welding seal welding, then enters stove insulation 3～4 hours;
The forward and backward plane of C, bearing block body is refined the paper size to figure on grinding machine, then by the bottom surface of fixture mill bearing block body take described frontal plane or back plane as benchmark, within the scope of be controlled at ± 0.05mm of the perpendicularity of forward and backward plane and bottom surface.
Adopt the processing method of line cutting to process the keyway on described bottom surface, then take bottom surface keyway as benchmark, by fixture, carry out the high and symmetry in the center of Control Shaft bearing body, and half finish turning after made allowance in advance; Finally, the endoporus of finish turning bearing block body is to figure paper size.
Creeping into after water hole and apopore, using air pump, bar magnet to remove residual scrap iron, adopting sander to remove burr, then cleaning, antirust processing.
Further, the both sides of the edge of described stainless steel cover plate and described water-cooling groove are by groove welding, to guarantee firm welding and service life.
Further, the central portion of described stainless steel cover plate is connected by multiple plug weldings with the lug boss of described water-cooling groove central authorities, to guarantee firm welding and service 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, water-cooling groove on employing stainless steel cover plate and bearing block body, through argon arc welding seal welding, has length and feature simple in structure of firm welding, service life.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below the specific embodiment by reference to the accompanying drawings of basis, 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 that the X 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 bearing seat of continuous casting machine of the present embodiment comprises: bearing block body 1, and the top end face of bearing block body 1 is arc surface, and this arc surface is provided with water-cooling groove 2, and these water-cooling groove 2 outsides manually black electrode argon arc welding seal weld are connected to stainless steel cover plate 4; The bottom of bearing block body 1 is provided with the inlet opening 1-2 and the apopore 1-3 that are communicated with the water-cooling groove 2 of described arc surface both sides respectively.
The both sides of the edge of described stainless steel cover plate 4 and described water-cooling groove 2 pass through groove welding.
Central portion on the plate of described stainless steel cover plate 4 is wide is connected by multiple plug weldings 3 with the central lug boss 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, strictly control roughing surplus, through metalworking workshop, blank is rough milled, rough turn endoporus, milling circular arc water-cooling groove, circulated to welding shop after boring water hole and removing polishing water-cooling groove, water hole burr.
Bearing block entered high temperature furnace heating 4 hours before soldering stainless steel plate, and the temperature of retainer shaft bearing body is 120～150 ℃, the welding of employing manual argon arc welding, selection of electrodes E5015 or E309, guaranteed all even attractive in appearance of weld seam, welded laggard stove insulation 3～4 hours, prevented that bearing block is because of cooling too fast cracking.
In order to guarantee the forward and backward plane of bearing block body and the perpendicularity of bottom surface, first the forward and backward plane of bearing block is refined to the paper size to figure on grinding machine, then by before fixture, one of back plane is for benchmark grinds bottom surface, within the scope of be controlled at ± 0.02mm of the perpendicularity of forward and backward plane and bottom surface.
Simultaneously, in order to guarantee the machining accuracy of bottom surface keyway of bearing block body, adopted the processing method of line cutting.Again through take bottom surface keyway as benchmark, by fixture, carry out the high and symmetry in the center of Control Shaft bearing body, 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 altimeters of Japan (Mitutoyo) three to detect, retainer shaft bearing center high with symmetry within the scope of ± 0.02mm, and every bearing block all pass through steel seal and numbers, records tests data.
Bearing block plane hole adopts Special drilling jig, in accurate positioning, assurance precision, has improved again speed of production.
After boring finishes, use air pump, bar magnet to remove residual scrap iron, adopt Germany's (Bosch) Bosch sander to remove burr, by technological requirement, carry out water-pressure sealed test, and make inspection record, then clean, antirust processing is until finished product, finally vanning.
Roller shell is produced 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.Detect after qualified and carry out rough turn processing, take cylindrical as benchmark, bore boring mesopore monolateral made allowance, afterwards modifier treatment.And first coupon is processed, detect after qualified and can start product to process.
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 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 dissimilar steel welding, and the stainless weldability of 0Cr18Ni is poor, and crack defect easily appears in welding point.
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 there is no significant dilution phenomenon, in technique, taked following measures:
1), in order to reduce the welding deformation of member as far as possible, taked two manual electric arc welding methods that electric welder is symmetrically welded, selection of electrodes E5015(or E309), the Cr equivalent of weld metal is 5%～6%, has good mechanical property after 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 likely cause welding point grain boundary carbide separates out and form ferritic structure, reduces widely the impact flexibility of joint.Preheat temperature is too low, does not have the effect of preheating, cannot prevent the formation of crackle.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), control and the tempering heat treatment of postwelding temperature: 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 subsequently, heat-treats.Temperature should be controlled within the scope of 700～730 ℃, 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, faster speed of welding.(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 multilayer welding, lower one weld seam of weldering after front one deck weld seam is cooled to 200～300 ℃.(4) postwelding carries out slow cooling.Concrete welding condition 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 without also giving exhaustive to all embodiments.And these belong to apparent variation that spirit of the present invention extended out or variation still among protection scope of the present invention.
Claims (1)
1. a processing method for bearing seat of continuous casting machine, is characterized in that: described bearing seat of continuous casting machine comprises: bearing block body, and the top end face of bearing block body is arc surface, and this arc surface is provided with water-cooling groove, and seal weld is connected to stainless steel cover plate outside this water-cooling groove; The bottom of bearing block body is provided with the inlet opening and the apopore that are communicated with the water-cooling groove of described arc surface both sides respectively;
The processing method of above-mentioned bearing seat of continuous casting machine comprises:
A, bearing block body is carried out successively that blank is rough milled, rough turn endoporus, milling water-cooling groove, crept into after water hole and apopore, remove polishing water-cooling groove, water hole burr, then bearing block body is sent into high temperature furnace heating 3-5 hour, and the temperature of retainer shaft bearing body is 120～150 ℃, finally enters welding procedure;
B, welding procedure: adopt manual argon arc welding stainless steel cover plate described in seal welding on described bearing block body, then enter stove insulation 3～4 hours;
The forward and backward plane of C, bearing block body is refined the paper size to figure on grinding machine, then by the bottom surface of fixture mill bearing block body take described frontal plane or back plane as benchmark, within the scope of be controlled at ± 0.05mm of the perpendicularity of forward and backward plane and bottom surface;
Adopt the processing method of line cutting to process the keyway on described bottom surface, then take bottom surface keyway as benchmark, by fixture, carry out the high and symmetry in the center of Control Shaft bearing body, and half finish turning after made allowance in advance; Finally, the endoporus of finish turning bearing block body is to figure paper size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210278633.XA CN102756249B (en) | 2011-03-18 | 2011-03-18 | Machining method for bearing seat of continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210278633.XA CN102756249B (en) | 2011-03-18 | 2011-03-18 | Machining method for bearing seat of continuous casting machine |
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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| CN102756249A CN102756249A (en) | 2012-10-31 |
| CN102756249B true CN102756249B (en) | 2014-04-30 |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3228190C2 (en) * | 1982-07-26 | 1985-10-03 | Mannesmann AG, 4000 Düsseldorf | Bearing for a centrally mounted continuous casting roller body |
| CN100362244C (en) * | 2005-04-29 | 2008-01-16 | 四川工程职业技术学院 | All welded steel structured bearing seat of blower fan water-cooling type in large-scale power station, and manufacturing method thereof |
| CN101480773B (en) * | 2009-01-22 | 2010-07-21 | 苏州利达铸造有限公司 | Method for processing bearing support |
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