CN1752472A - Method for producing bearing ferrule blanks - Google Patents
Method for producing bearing ferrule blanks Download PDFInfo
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- CN1752472A CN1752472A CN 200510060728 CN200510060728A CN1752472A CN 1752472 A CN1752472 A CN 1752472A CN 200510060728 CN200510060728 CN 200510060728 CN 200510060728 A CN200510060728 A CN 200510060728A CN 1752472 A CN1752472 A CN 1752472A
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- lasso
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- bearing ferrule
- ferrule blanks
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Abstract
The bearing ring blank production method includes the following procedures: smelting molten steel, centrifugal casting pipe, stress annealing, blanking ring to be rolled, stripping inner diameter and outer diameter of ring, checking quality of intermediate blank, medium frequency heating, hot-rolling ring and forming, spheroidal annealing, ball-blasting, checking ring quality, soaking the finished ring blank in oil and putting in storage.
Description
Technical field
The invention discloses a kind of method for producing bearing ferrule blanks, belong to the Production of bearing technical field.
Background technique
Bearing industry is produced the employed material of bearing ring, mainly be based on bearing seamless steel pipe (except that large-scale and specific bearing), for a long time, the bearing seamless steel pipe all is big-and-middle-sized smelter production, because of existing production technology and technology more complicated, use the heavy manufacturing mechanism of high energy consumption many, production process is many, various supplementary product onsumptions are also many, so the cost of production height of bearing seamless steel pipe.In general, the cost of a cover finished product bearing, its middle (center) bearing inner and outer ring proportion is: 40%-60%.
At present, the bearing seamless steel pipe has multiple production methods such as " hot rolling, cold rolling, cold-drawn, hot rolling peelings " in the world, wherein the quality standard of hot-rolled pipe is difficult to adapt to the requirement that bearing industry is produced, the cost of cold rolled tube is too high can not to adapt to the Production of bearing technical requirements, and hot rolling peeling pipe is domestic still not to have manufacturer production.And the comparison operators sympodium holds manufacturing requirements, mainly be based on cold drawing seamless pipe, its main production flow process is as follows: molten steel is smelted, ingot casting, cogging, rolling circular pipe blank, pipe quality inspection and finishing, pipe cuts off, heating, centering, perforation, take the lead, pickling, clean, passivation, check reconditioning, annealing, aligning, pickling, clean, phosphatization, clean, saponification, dry, the secondary saponification, cold-drawn, annealing, the finished product aligning, crop, get material, pickling, clean, passivation, finishing is checked, chamfering, the spray word, packing, immersion oil, warehouse-in (factory state is a steel pipe), after Production of bearing producer buys steel pipe, blanking, make bearing ferrule blanks.
Annotate: above-mentioned technology is after cold-drawn annealing, and the steel pipe according to the different size of producing also will return the upper track acid cleaning process, once more and repeatedly cyclic process.
The shortcoming of this production technology is:
1, complex manufacturing, production process is many, uses various production auxiliary materials many, waster rate height;
2, use machinery many, investment is big;
3, can not satisfy user's small lot, special chemical composition requirement;
What 4, offer the user is steel pipe, and Production of bearing producer also need carry out blanking, increases the lasso cost of production;
5, cost of production height.
In view of this, number of patent application: the patent application document of " 02132883.8 " discloses a kind of bearing sleeve processing shaping technology, and this technology mainly comprises: steel-making, centrifugal casting, cutting, open die forging, flaw detection, annealing, sample examination, cut, quench tempering, grinding etc.Its centrifugal casting is to cast bearing ferrule blanks shape just, and presses finished parts weight 1-2.5 doubly as allowance.This production technology has shortened the manufacture cycle of bearing ring to a certain extent, has reduced the cost of production of bearing.But this technology mainly designs for solving large-scale and super sized type specific bearing lasso, and the major defect of existence is:
1, this technology can only be produced large-scale, super sized type specific bearing lasso, accounts for the middle-size and small-size bearing ring of bearing total amount more than 80% and can not produce;
2, the manufacturing efficiency of this technology is low, and general each centrifugal casting bearing ferrule blanks can only be about 1-3;
3, this arts demand utilizes free forging process, and free forging process falls behind, manual operation, and the single-piece work time is long, poor quality's control, reject rate height;
4, this technology is owing to adopt open die forging processing, and the defect detecting test of blank increases processing cost and time in the middle of needing;
5, this processes allowance is 1-2.5 times, and the metallic material waste is serious;
6, this process environments noise big (being mainly open die forging causes).
7, this explained hereafter efficient is low, and stock utilization is low, the cost of production height.
Summary of the invention
The present invention is directed to above-mentioned situation, purpose is to provide that a kind of production technology is simple, yield rate is high, quality is good, can effectively reduces the method for producing bearing ferrule blanks of Production of bearing cost.
For achieving the above object, the technical solution adopted in the present invention is: external diameter peeling in molten steel smelting, spun cast pipe, stress annealing, lasso blanking to be rolled, the lasso, intermediate blank quality inspection, heating in medium frequency, lasso hot-roll forming, spheroidizing annealing, ball blast, lasso quality inspection, immersion oil, warehouse-in are bearing ferrule blanks.
Described spun cast pipe comprises molten steel tundish, teeming ladle, centrifugal tube casting machine swaging die, wherein the cast tube temperature is at 1300 ℃-1570 ℃, rotating speed 1000-1400 rev/min, time 2-4 minute, and add by collar blank weight that 5%-8% allowance, molten steel form the seamless hollow billet of as cast condition, cooling, dismounting swaging die two end blanking covers, take out pipe in high speed rotating, the hot state of steel pipe is gone into annealing furnace.
Described stress annealing needs steel pipe slowly is heated to 500 ℃-650 ℃ earlier, and 2-4 hour insulation of process slow cooling to low temperature is again come out of the stove.
The external diameter peeling is meant to satisfy on steel pipe and carries out cutting stock in described lasso blanking to be rolled and the lasso, after the blanking internally external diameter carry out accurate cutting location again,
Described intermediate blank quality inspection is meant the intermediate blank quality inspection after blanking, interior external diameter peeling, and described heating in medium frequency is meant through its temperature of Frequency Induction Heating and is 1000 ℃-1250 ℃, and is described
The lasso hot-roll forming can adopt ring rolls to finish.Grinding the ring temperature is 1000 ℃-1250 ℃ rotating speed 1000-1400 rev/min, time 2-3 minute.
Described spheroidizing annealing, during annealing earlier 770 ℃-790 ℃ insulations 2-4 hour down, again by per hour 10 ℃ reduce to 680 ℃ of slow cooling and come out of the stove.
Innovative point of the present invention is: the present invention is the new method that the production of a kind of plain bearing collar blank settles at one go, and is the production method of research and invention Bearing Steel anything but.Mainly by inter-trade introduction with absorb different, ripe processing technology and equipment, technical requirements at bearing seamless steel pipe and bearing ferrule blanks, the production of bearing seamless steel pipe and bearing ring is combined together, the combination of the science of carrying out and the optimization of technology form a seamless hollow billet of brand-new bearing and method for producing bearing ferrule blanks.Guaranteeing to reduce manufacturing procedure significantly under the prerequisite of quality, the consumption of process equipment and various production auxiliary materials, simplify course of working, shorten the process-cycle, to reach the purpose that reduces bearing ferrule blanks cost of production about 30%, and the bearing ferrule blanks quality of producing is good, with low cost.Manufacturing mechanism and production technology adaptability compatibility are good simultaneously, and technology is simple, flow process is short, project investment is few, medium-sized and small enterprises can both bear.
After the present invention adopted technique scheme, steel pipe's production lasso technology as compared with the past and number of patent application were the bearing ring production technology of " 02132883.8 ", and its advantage is:
1, production technology is simple, and production process is few, and the cycle is short, uses various auxiliary material few, and the chance of producing waster is few, the productivity height;
2, manufacturing efficiency height, the output height.Because centrifugal casting is come out is that the as cast condition steel pipe of all size go through annealing, blanking, interior external diameter peeling, after grinding ring, spheroidizing annealing into lasso one by one, but the lasso of a steel pipe blanking making tens even more than 100 different size in general;
3, do not need open die forging processing;
4, metallic material less wastage, allowance are 5%-8% (loss of external diameter peeling in the lasso);
5, except that needing defect detecting test before the end product warehouse-in, its intermediate blank need not defect detecting test
6, the production environment noise is little;
7, adaptability, compatible good, can produce medium and small lasso, also can produce large-scale, super sized type bearing ring;
8, owing to adopt centrifugal steel pipe moulding process, the inner crystal grain of lasso is fine and closely woven, and various metals and sonims are few, and mechanical property and life-span are improved largely;
What 9, offer the user directly is the bearing ring of all size, goes blanking again without manufacturer, greatly facilitates manufacturer, has reduced the Production of bearing cost;
10, this manufacturing mechanism and technology can also be produced various bigborely, and the steel pipe of special steel grade is as radiation pipe and various heat resistant furnace bushing pipes etc.;
11, can satisfy user's small lot, the requirement of special chemical composition;
12, the bearing ring of relative steel pipe's production, cost reduces about 30%;
13, a whole set of technology uses machinery equipment few, artificial less investment, and the project gross investment is few.
Embodiment
Embodiment 1: will be through the high-quality steel scrap tundish of tapping after 1570 ℃ of smeltings after the cleaning; teeming ladle is to the centrifugal tube casting machine swaging die; and add 5% allowance by collar blank weight; molten steel forms the seamless hollow billet of as cast condition in high speed rotating; in this process; it is 10000 rev/mins, 2 minutes time that the cast tube temperature remains on 1300 ℃, rotating speed; after cooling off, dismantle swaging die two end blanking covers again; take out the hot state of pipe back steel pipe and enter annealing furnace; have ready conditions down; can when cast tube, feed shielding gas, to reduce the secondary oxidation of molten steel.Stress annealing is taked in the annealing of as cast condition steel pipe, and its process is: with slowly 500 ℃ of heating of steel pipe, through 2 hours insulations again slow cooling to low temperature come out of the stove.Because steel pipe is when spun cast pipe, its outer surface is with mould wash, internal surface has the various foreign material of emersion and particle to need to remove fully, so must on steel pipe, satisfy the individual cutting stock that carries out, the peeling of external diameter processing (and must carry out blanking) in carrying out by the height of different size bearing ring, bearing ring according to production different size, except that the hot backing machining allowance of having considered when the cast tube of thickness of steel pipe (machining allowance of external diameter in comprising), internally external diameter carries out comparatively accurate cutting location again after blanking, to guarantee the compression ratio coefficient of lasso in hot backing processing, reach technical requirements.After spun cast pipe, annealing, blanking, interior external diameter peeling, just form the intermediate blank of lasso to be rolled.Intermediate blank is carried out quality inspection, at first, check the interior external diameter and the height of intermediate blank, whether meet the requirements that this is directly connected to the Organizational Structure and the boundary dimension of lasso, can meet the processing technique requirement of this model lasso, secondly, lasso is after interior external diameter peeling, and any foreign material do not have on the surface, pipe, casting skin, defectives such as crackle, need only a little defective, certainly will in hot backing processing, enlarge defective, cause waste product, certainly, guarantee to reach above-mentioned requirements, except in blanking, interior external diameter peeling, strict in the quality inspection by beyond rules and the technical requirements operation, appropriateness strengthens the cast tube tolerance dimension, and it also is very necessary strengthening the peeling and cutting amount.After the intermediate blank quality inspection is qualified, carry out the backing hot working of intermediate blank, because the steel pipe of formation of centrifugal cast tube is a cast structure, can not directly produce bearing ring, so must carry out the hot rolling processing technology, hot-rolled temperature is controlled at 1000 ℃, make tissue meet the bearing ring technical requirements.Heating in medium frequency is a heating process necessary before the lasso hot-roll forming, and its principle is an electromagnetic induction heating, and ready-made equipment purchase is arranged.Heating in medium frequency is carried out pipelining system between the lasso hot-rolled process, and detection facility has the temperature controlling instrument sum counter.The selected equipment of lasso hot rolling is ring rolls, ring rolls is in heat-processing equipment, rolling quality to ring part is very good, advantage is more, is to make the seamless ring part of accurate processing dimension and circumferential streamline metal forming technology commonly used, rolling workpiece are arranged, interior tissue is even, fine and closely woven, profile precision height, can be saved a large amount of metallic material at the output height, and can use the production with any amount.Be equipped with the mould of different shape, can produce the ring part in various cross sections, as square, rectangle, inner ball surface, outer spherical surface, male and fomale(M﹠F), triangle etc.Adopt the basic goal of the hot backing technology of lasso, be to make the lasso interior tissue change the hot rolling metallographic structure that meets the bearing ring technical requirements into by as cast condition, this is the main task of this procedure, and therefore, selection and backing compression ratio coefficient reasonable in design seem particularly important.Though the inside crystal grain of spun cast pipe is fine and closely woven, must be cast structure unexpectedly, this coefficient selection is compressed in its backing, should be advisable greatly than the workpiece of other hot rolling microstructure, certainly, also should in actual production, backing compression ratio coefficient further be compared and analyze, to guarantee correct compression ratio coefficient.The spheroidizing annealing of lasso, in fact be similar to the nodularization heat treatment process of hot rolling bearing steel pipe after hot rolling ends, its objective is and make lasso have good comprehensive process performance, meet the metallographic structure (globular pearlite) of bearing requirement fully, road ring quenching technology under also being simultaneously, lay a good foundation, after ball blast removes oxide and the burr that product surface may exist, the lasso quality inspection, lasso quality inspection content is a product appearance, size, flaw detection, low power, after qualified with the product immersion oil, warehouse-in is the finished product bearing ferrule blanks, can directly produce for road cutting under the Production of bearing producer.
Embodiment 2: will be through the high-quality steel scrap tundish of tapping after 1590 ℃ of smeltings after the cleaning; teeming ladle is to the centrifugal tube casting machine swaging die; and add 8% allowance by collar blank weight; molten steel forms the seamless hollow billet of as cast condition in high speed rotating; in this process; the cast tube temperature remains between 1570 ℃, rotating speed is 1400 rev/mins, 4 minutes time; after cooling off, dismantle swaging die two end blanking covers again; take out the hot state of pipe back steel pipe and enter annealing furnace; have ready conditions down; can when cast tube, feed shielding gas, to reduce the secondary oxidation of molten steel.Stress annealing is taked in the annealing of as cast condition steel pipe, and its process is: with slowly 650 ℃ of heating of steel pipe, through 4 hours insulations again slow cooling to low temperature come out of the stove.Other operations only are controlled at hot-rolled temperature 1250 ℃ with embodiment 1.
Embodiment 3: will be through the high-quality steel scrap tundish of tapping after 1580 ℃ of smeltings after the cleaning; teeming ladle is to the centrifugal tube casting machine swaging die; and add 7% allowance by collar blank weight; molten steel forms the seamless hollow billet of as cast condition in high speed rotating; in this process; the cast tube temperature remains between 1450 ℃, rotating speed is 1200 rev/mins, 3 minutes time; after cooling off, dismantle swaging die two end blanking covers again; take out the hot state of pipe back steel pipe and enter annealing furnace; have ready conditions down; can when cast tube, feed shielding gas, to reduce the secondary oxidation of molten steel.Stress annealing is taked in the annealing of as cast condition steel pipe, and its process is: with slowly 600 ℃ of heating of steel pipe, through 3 hours insulations again slow cooling to low temperature come out of the stove.Other operations only are controlled at hot-rolled temperature 1150 ℃ with embodiment 1.
Claims (7)
1, method for producing bearing ferrule blanks is characterized in that it has following operation: external diameter peeling in molten steel smelting, steel tube centrifugal casting, stress annealing, lasso blanking to be rolled, the lasso, intermediate blank quality inspection, heating in medium frequency, lasso hot-roll forming, spheroidizing annealing, ball blast, lasso quality inspection, immersion oil, warehouse-in are bearing ferrule blanks.
2, method for producing bearing ferrule blanks according to claim 1, it is characterized in that described spun cast pipe comprises molten steel tundish, teeming ladle, spun cast pipe machinery swaging die and add by collar blank weight that 5%-8% allowance, molten steel form the seamless hollow billet of as cast condition, cooling, dismounting swaging die two end blanking covers, take out pipe in high speed rotating, the hot state of steel pipe is gone into annealing furnace, wherein the cast tube temperature was 1300 ℃-1570 ℃, rotating speed 1000-1400 rev/min, time 2-4 minute.
3, method for producing bearing ferrule blanks according to claim 1 when it is characterized in that stress annealing, needs steel pipe slowly is heated to 500 ℃-650 ℃ earlier, and 2-4 hour insulation of process slow cooling to low temperature is again come out of the stove.
4, method for producing bearing ferrule blanks according to claim 1, it is characterized in that the external diameter peeling is the individual then cutting stock that carries out on steel pipe in described lasso blanking to be rolled and the lasso, internally external diameter carries out accurate cutting location again after blanking, again through hot backing processing.
5, method for producing bearing ferrule blanks according to claim 1, the heating-up temperature of lasso is 1000 ℃-1250 ℃ when it is characterized in that described heating in medium frequency.
6, method for producing bearing ferrule blanks according to claim 1 is characterized in that described lasso hot-roll forming adopts ring rolls to finish, and hot-rolled temperature is at 1000 ℃-1250 ℃.
7, method for producing bearing ferrule blanks according to claim 1 is characterized in that described spheroidizing annealing, earlier 770 ℃-790 ℃ insulations 2-4 hour down, progressively is cooled to and is not higher than 680 ℃ of slow cooling and comes out of the stove during annealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100607284A CN100408879C (en) | 2005-09-07 | 2005-09-07 | Method for producing bearing ferrule blanks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100607284A CN100408879C (en) | 2005-09-07 | 2005-09-07 | Method for producing bearing ferrule blanks |
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| Publication Number | Publication Date |
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| CN1752472A true CN1752472A (en) | 2006-03-29 |
| CN100408879C CN100408879C (en) | 2008-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100607284A Expired - Fee Related CN100408879C (en) | 2005-09-07 | 2005-09-07 | Method for producing bearing ferrule blanks |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576123B (en) * | 2008-05-09 | 2012-11-28 | 嵊州市美亚特种轴承厂 | Process for manufacturing bearing ring |
| CN102873510A (en) * | 2012-09-04 | 2013-01-16 | 太原科技大学 | Method for directly producing ring parts by centrifugal casting and cold rolling |
| CN104295613A (en) * | 2014-10-24 | 2015-01-21 | 德清德曼汽车零部件有限公司 | Automobile specially-shaped bearing outer ring forge piece |
| CN114871695A (en) * | 2022-04-24 | 2022-08-09 | 中国科学院金属研究所 | M50 steel bearing ring, preparation method thereof and bearing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS220401B1 (en) * | 1973-12-04 | 1983-04-29 | Karel Sommer | Method of manufacturing hollow circular workpieces |
| CN88101307A (en) * | 1988-03-13 | 1988-09-14 | 纪绍祥 | Casting and forging technique of ring blank of roller bearing |
| CN1243207A (en) * | 1998-07-25 | 2000-02-02 | 李峰生 | Method for producing collar blank of rolling bearing |
| CN1414256A (en) * | 2002-09-09 | 2003-04-30 | 周发金 | Bearing sleeve processing shaping technology |
-
2005
- 2005-09-07 CN CNB2005100607284A patent/CN100408879C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576123B (en) * | 2008-05-09 | 2012-11-28 | 嵊州市美亚特种轴承厂 | Process for manufacturing bearing ring |
| CN102873510A (en) * | 2012-09-04 | 2013-01-16 | 太原科技大学 | Method for directly producing ring parts by centrifugal casting and cold rolling |
| CN104295613A (en) * | 2014-10-24 | 2015-01-21 | 德清德曼汽车零部件有限公司 | Automobile specially-shaped bearing outer ring forge piece |
| CN114871695A (en) * | 2022-04-24 | 2022-08-09 | 中国科学院金属研究所 | M50 steel bearing ring, preparation method thereof and bearing |
| CN114871695B (en) * | 2022-04-24 | 2024-02-09 | 中国科学院金属研究所 | M50 steel bearing ring, preparation method thereof and bearing |
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| Publication number | Publication date |
|---|---|
| CN100408879C (en) | 2008-08-06 |
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