CN102886660A - Short-flow processing technology of ferrule roughcast used for turntable bearing - Google Patents

Short-flow processing technology of ferrule roughcast used for turntable bearing Download PDF

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Publication number
CN102886660A
CN102886660A CN2012104376289A CN201210437628A CN102886660A CN 102886660 A CN102886660 A CN 102886660A CN 2012104376289 A CN2012104376289 A CN 2012104376289A CN 201210437628 A CN201210437628 A CN 201210437628A CN 102886660 A CN102886660 A CN 102886660A
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CN
China
Prior art keywords
processing technology
ferrule
turntable bearing
short
roughcast
Prior art date
Application number
CN2012104376289A
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Chinese (zh)
Inventor
王明礼
李昭昆
端木培兰
孙小东
尤蕾蕾
陈文君
陈小超
王丽霞
Original Assignee
洛阳Lyc轴承有限公司
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Application filed by 洛阳Lyc轴承有限公司 filed Critical 洛阳Lyc轴承有限公司
Priority to CN2012104376289A priority Critical patent/CN102886660A/en
Publication of CN102886660A publication Critical patent/CN102886660A/en

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Abstract

The invention discloses a short-flow processing technology of ferrule roughcast used for a turntable bearing. The short-flow processing technology comprises the processing steps of carrying out smelting, casting to form an annular casting, cutting a feed head, heating the annular casting, and rolling the annular ferrule roughcast; and then carrying out normalizing and tempering heat treatment on the rolled annular ferrule roughcast. Compared with the existing processing technology, the short-flow processing technology omits the processes of primarily heating an ingot casting, forging (or milling) bar stock, sawing (or carrying hot cutting) the stock, carrying out stock heating for a second time, and carrying out forging, punching and the like, thereby greatly reducing the production cost. Ferrule parts of the turntable bearing, which can meet the technical requirements, can be obtained through the subsequent normalizing and tempering heat treatment. The short-flow processing technology is applied to the ferrule roughcast used for the turntable bearing, and the external diameter of which is within the scope of 500mm-1500mm.

Description

A kind of turntable bearing short flow process processing technology of collar blank
Technical field
The invention belongs to technical field of hot working, relate generally to be a kind of turntable bearing add with short flow process processing technology, the especially external diameter turntable bearing in 500mm~1500mm scope of the collar blank short flow process with the annular collar blank Worker's technique.
Background technology
At present, the employed collar blank of bearing industry all is to adopt traditional forming method, and its technological process is that steel-making → ingot casting → excision ingot casting cap mouth becomes bar → sawing → material section heating (post bake) → forging → upsetting cake → punching → ring forging heating (three heating) → rolling to circularize collar blank with afterbody → ingot casting heating (once heating) → forging (or rolling).The traditional diamond-making technique of this bearing ferrule blanks is very loaded down with trivial details, and not only production efficiency is low, and production cost is also higher.
Because the turntable bearing collar blank is to adopt ingot casting as raw-material, and the sectional area of ingot casting is larger, exist inevitably a large amount of pores in the ingot casting, serious is loose, the casting flaw such as segregation and column crystal, therefore, in order to eliminate the casting flaw in the ingot casting, must the head and tail section excision of more serious impurity will be had in the ingot casting, then carry out heats forged or be rolled into rod iron, for rod iron is processed into bearing ferrule blanks, must first rod iron be cut into the material section, again carry out heats forged, the upsetting cake, punching, and then rolling becomes bearing annular collar blank.By forging and rolling is further eliminated and improved cast sturcture's defective in the original ingot casting.This shows, it is the inevitable factor that causes its manufacturing procedure various as raw-material moulding process that tradition turntable bearing annular collar adopts ingot casting, this is because for ingot casting being processed into the shape of bearing annular collar blank, shape and size require and the turntable bearing lasso part of forging specification requirement just just must can obtain meeting through foregoing loaded down with trivial details operation.In addition, so that eliminate the casting flaws such as pore serious in the ingot casting, serious loose, segregation and column crystal, just must these casting flaws be eliminated through repeatedly forging processing.Be to cause processing method loaded down with trivial details, production efficiency is low, and production cost occupies the main cause under high-leveled and difficult.
Summary of the invention
The objective of the invention is to propose a kind of turntable bearing with the short flow process processing technology of collar blank, by the shortening work flow, the decrease production cost, enhance productivity the turntable bearing lasso part that conforms to quality requirements.
The present invention realizes that the technical scheme that above-mentioned purpose is taked is: a kind of turntable bearing short flow process processing technology of collar blank, its processing step is: smelt → be cast as annular foundry goods → cut rising head → heating annular foundry goods → rolling to circularize collar blank, then rolling is circularized collar blank and carry out normalizing, modified heat treatment.
The present invention adopts molten steel directly to pour into annular foundry goods near the collar blank finished size, because the sectional dimension of annular foundry goods is far smaller than the sectional dimension of the ingot casting of traditional handicraft employing, therefore, compare with the ingot casting that traditional handicraft adopts, the casting flaws such as loose, the pore of casting in the ring, segregation are much slight, after follow-up rolling processing, slight as cast condition defective can be eliminated basically in the casting ring.
In view of above reason, the traditional handicraft that the technique that the present invention adopts molten steel directly to cast single-piece annular foundry goods+rolling moulding can replace the various collar blank of operation to be shaped.Because processing and forming technology and traditional comparing that the present invention proposes, reduced: an ingot casting heating → forging (or rolling) becomes bar → sawing (or the earnestly) blanking → manufacturing procedures such as secondary material section heating → forging → upsetting cake → punching, therefore, can reduce production costs significantly, enhance productivity.
Test shows, the blank that adopts short flow process lasso moulding process of the present invention to produce, and mechanical property can satisfy the specification requirement of turntable bearing lasso fully after the normalizing of routine, modifier treatment.
The specific embodiment
In conjunction with the instantiation that provides processing technology of the present invention is illustrated, but does not consist of any limitation of the invention.
Inventing described bearing ring is the short flow process processing technology that the turntable bearing of external diameter in 500mm~1500mm scope used the annular collar blank, this technique comprises: smelt → cast annular foundry goods → cut rising head → heating annular foundry goods → rolling to circularize collar blank, then rolling is circularized collar blank and carry out normalizing, modified heat treatment.
Be explained as an example of bearing designation 013.30.1220.04 example.Its processing step is:
Smelt: employing electric arc furnaces routinely technique is smelted the 42CrMo steel, and the chemical composition one of molten steel (ZG42CrMo) should meet: C 0.38~0.45, and Mn 0.60~1.00, Si 0.30~0.60, and Cr 0.80~1.20, and Mo 0.20~0.30, Ni≤0.30, Cu≤0.25.
Casting: adopt conventional sand casting process to cast, foundry goods is of a size of: φ 838 * φ 500 * 242.
Cut rising head: because foundry goods is in when cast, the impurity come-up in the molten steel concentrates on the rising head place of foundry goods, and in order to guarantee the quality of foundry goods, behind the foundry goods cool to room temperature, the method that adopts sawing is cut away the rising head of foundry goods.
Heating annular foundry goods: will finish the casting ring of cutting rising head and put into forge furnace and heat, and be heated to 1150 ℃, and be incubated 4.5 hours.
Rolling: adopt conventional rolling technique that heating annular foundry goods is carried out the rolling moulding, the lasso after the rolling is of a size of φ 1356 * φ 1189.5 * 231;
Normalizing: conventional normalizing process: 870 ℃ * 8h, it is air-cooled to come out of the stove.
Modified: common process: quenching technical is 840 ℃ * 2.5h, and high-temperature tempering process is 580 ℃ * 6h.
Press the bearing ring of present embodiment moulding, carry out mechanical property and detect after normalizing, modifier treatment, it the results are shown in following table.
The mechanical property testing result
As can be seen from the table, by the bearing ring of abbreviated system moulding of the present invention, mechanical property satisfies the requirement of JB/T6396-2006 " large-scale structural alloy steel technical conditions " after normalizing, modifier treatment.

Claims (3)

1., a kind of turntable bearing short flow process processing technology of collar blank, it is characterized in that: its processing step comprises: smelt → be cast as annular foundry goods → cut rising head → heating annular foundry goods → rolling to circularize collar blank, then rolling is circularized collar blank and carry out normalizing, modified heat treatment.
2. turntable bearing according to claim 1 is with the short flow process processing technology of collar blank, and it is characterized in that: the described annular foundry goods that is cast as is of a size of: φ 838 * φ 500 * 242.
3. turntable bearing according to claim 1 is with the short flow process processing technology of collar blank, and it is characterized in that: described heating annular foundry goods is put into forge furnace and heated, and is heated to 1150 ℃, is incubated 4.5 hours.
CN2012104376289A 2012-11-06 2012-11-06 Short-flow processing technology of ferrule roughcast used for turntable bearing CN102886660A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103978138A (en) * 2014-05-05 2014-08-13 武汉理工大学 Method for improving bearing casting blank surface quick-cooling and controlling hot rolling tissues
CN104827245A (en) * 2015-02-03 2015-08-12 江苏金源锻造股份有限公司 Forging process of bearing ring
CN106493527A (en) * 2016-12-30 2017-03-15 西南铝业(集团)有限责任公司 A kind of seat ring processing method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927450A (en) * 1973-12-04 1975-12-23 Zkl Z Na Valiva Loziska A Trak Method of manufacturing hollow, circular-shaped workpieces
WO1999034023A1 (en) * 1997-12-26 1999-07-08 Nsk Ltd. Continuous annealing furnace, rolling bearing, annealing method, and method of manufacturing inner and outer races of deeply groove ball bearing
CN101014432A (en) * 2004-09-03 2007-08-08 詹弗兰科·帕索尼 Method and device for producing a mechanical part, in particular a bearing ring and a part produced by said method
CN101817134A (en) * 2010-03-22 2010-09-01 太原科技大学 Short-flow casting and rolling composite forming method for ferrule piece
CN102699635A (en) * 2012-06-18 2012-10-03 西南大学 Liquid die-forging and rolling composite forming method for bearing ring piece

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927450A (en) * 1973-12-04 1975-12-23 Zkl Z Na Valiva Loziska A Trak Method of manufacturing hollow, circular-shaped workpieces
WO1999034023A1 (en) * 1997-12-26 1999-07-08 Nsk Ltd. Continuous annealing furnace, rolling bearing, annealing method, and method of manufacturing inner and outer races of deeply groove ball bearing
CN101014432A (en) * 2004-09-03 2007-08-08 詹弗兰科·帕索尼 Method and device for producing a mechanical part, in particular a bearing ring and a part produced by said method
CN101817134A (en) * 2010-03-22 2010-09-01 太原科技大学 Short-flow casting and rolling composite forming method for ferrule piece
CN102699635A (en) * 2012-06-18 2012-10-03 西南大学 Liquid die-forging and rolling composite forming method for bearing ring piece

Non-Patent Citations (1)

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Title
张锋: "基于铸坯的环件热辗扩成形工艺数值模拟", 《中国优秀硕士学位论文全文库,工程科技I辑》, no. 10, 30 October 2011 (2011-10-30), pages 022 - 209 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103978138A (en) * 2014-05-05 2014-08-13 武汉理工大学 Method for improving bearing casting blank surface quick-cooling and controlling hot rolling tissues
CN103978138B (en) * 2014-05-05 2016-01-06 武汉理工大学 A kind of bearing casting billet surface speed is cold-controls heat to roll over and organize ameliorative way
CN104827245A (en) * 2015-02-03 2015-08-12 江苏金源锻造股份有限公司 Forging process of bearing ring
CN106493527A (en) * 2016-12-30 2017-03-15 西南铝业(集团)有限责任公司 A kind of seat ring processing method

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Application publication date: 20130123