CN108672619A - A kind of tapered roller bearing internal ring cold roll forming method - Google Patents

A kind of tapered roller bearing internal ring cold roll forming method Download PDF

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Publication number
CN108672619A
CN108672619A CN201810401252.3A CN201810401252A CN108672619A CN 108672619 A CN108672619 A CN 108672619A CN 201810401252 A CN201810401252 A CN 201810401252A CN 108672619 A CN108672619 A CN 108672619A
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China
Prior art keywords
ring
roller
billet
height
round estrade
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钱东升
华林
路博涵
路晓辉
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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Priority to CN201810401252.3A priority Critical patent/CN108672619A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00Making articles shaped as bodies of revolution
    • B21H1/06Making articles shaped as bodies of revolution rings of restricted axial length
    • B21H1/12Making articles shaped as bodies of revolution rings of restricted axial length rings for ball or roller bearings

Abstract

The invention discloses a kind of tapered roller bearing internal ring cold roll forming methods, include the following steps:S1, ring billet is divided into the ring billet small cylinder being smoothly connected, the small round estrade of ring billet, the big round estrade of ring billet and the big cylinder of ring billet along short transverse;S2, rolling groove are formed by the working face of driven roller, core roller and guide roller, driven roller, core roller and guide roller are both designed as I-shaped structure, the shape of working surface of driven roller and guide roller is consistent with the external surface shape of inner ring ring, the shape of working surface of core roller is consistent with the inner surface configuration of inner ring ring, the flange of driven roller, core roller and guide roller upper and lower ends carries out axial constraint to the both ends of the surface of ring billet respectively, driven roller rotates, core roller does radial feed movement simultaneously, and cold roll forming is carried out to ring billet.The present invention has the advantages that forming accuracy height, Improving The Quality of Products, stock utilization and processing efficiency.

Description

A kind of tapered roller bearing internal ring cold roll forming method
Technical field
The invention belongs to bearing mnanufacture technical fields, and in particular to a kind of tapered roller bearing internal ring cold roll forming method.
Background technology
Taper roll bearing as the quasi-representative rolling bearing that can bear diameter, axial connected load, automobile, milling train, Mine, metallurgical equipment field have a wide range of applications, and equipping bearing transmission particularly with high-speed overload plays an important role.Axis Bearing ring (including inner ring and outer ring) is the matrix of loading ability of bearing, has conclusive shadow to the military service performance of bearing and service life It rings, is the core of bearing mnanufacture.Since conical roller bearing ring is complex-shaped, cut after generally using hot forming in industrial production The mode of processing is cut, wherein heat forming technology is mainly hot rolling forming after forging extruding forming or forging extruding base.
There are some to show in terms of Technical Economy and forming quality for traditional conical roller bearing ring hot forming mode Work problem:1, high energy consumption, scaling loss is big, and stock utilization is low;2, forming accuracy is low, and cutting output is big, to the integrality of metal streamline It destroys big;3, grain structure is more coarse.Heat forming technology problem not only affects bearing ring production efficiency and cost, but also Its mechanical performance is compromised, bearing military service performance is also affected, particularly with needs in bad working environments such as high speed, heavy duty, impacts The high-quality taper roll bearing of lower long life serve, existing heat forming technology already cannot be satisfied demand.
Cold rolling ring (abbreviation cold rolling) be used as a kind of advanced precision plastic forming technology, it is not only energy saving, section material, efficiently, and And complete fine and close metal streamline and thin even grain structure are obtained by room temperature precision form, it can significantly strengthen mechanical property And fatigue behaviour, the extensive use in bearing ring industrial production, it is to substitute to be thermoformed into as high-performance bearing lasso Mainstream manufacturing technology.Since bearing steel temperature-room type plasticity is low, cold formability is poor, the cross sectional shape of bearing ring cold roll forming is more simple It is single, generally rectangular cross-section section and symmetrical odd-shaped cross section.However, conical roller bearing ring has asymmetric abrupt-change cross section geometry special Point, cold roll forming difficulty is big, proposes very high request to technological design planning, easily generates rolling because design planning is unreasonable Process unstability warpage, section shape the defects of imperfect, therefore can only simplify shape roll forming machining again, not only consumptive material It takes, and the metal streamline of complete reasonable layout can not be obtained, cold rolling technology economic effect and product quality are constrained, with circle Taper roller bearing lasso is that the unsymmetrical section bearing ring precision cold-rolled forming technique of representative is also current high performance bearing system Making industry, there is an urgent need to capture the key technology of solution.
Invention content
The purpose of the present invention is to provide a kind of tapered roller bearing internal ring cold roll forming methods, it is cold by careful design Ring billet and pass, the operation of rolling of making rational planning for are rolled, realizes asymmetric inner cone cross-sectional profile precision form, is obtained in high precision and complete Whole compact metal streamline improves product manufacturing Technical Economy and capability and performance.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of tapered roller bearing internal ring cold roll forming method, inner ring ring include ring round estrade and justify positioned at ring The small baffle ring of stage body miner diameter end and big baffle ring positioned at ring round estrade bigger diameter end are equipped with ring cylindrical hole in inner ring ring, Include the following steps:
S1, ring billet design:Ring billet is divided into the ring billet small cylinder being smoothly connected, the small round platform of ring billet along short transverse The big round estrade of body, ring billet and the big cylinder of ring billet, the height of ring billet small cylinder are slightly less than the height of small baffle ring, the big cylinder of ring billet The height of body is slightly less than the height of big baffle ring, and the sum of height of the small round estrade of ring billet and the big round estrade of ring billet is equal to ring round estrade Height, be based on constancy of volume principle, according to each size of each size design ring billet of inner ring ring;
S2, cold roll forming:Rolling groove uses half-closed pass structure, and driven roller, core roller and guide roller are both designed as work The shape of working surface of font structure, driven roller and guide roller is consistent with the external surface shape of inner ring ring, the working face shape of core roller Shape is consistent with the inner surface configuration of inner ring ring, and ring billet is put between driven roller and core roller, and is oriented to by guide roller, The flange of driven roller, core roller and guide roller upper and lower ends carries out axial constraint to the both ends of the surface of ring billet respectively, and driven roller, which is done, to be rotated Movement, while core roller does radial feed movement, carries out cold roll forming to ring billet, obtains inner ring ring.
According to the above technical scheme, in step S1, ring billet size design specifically includes following steps:
S101, design rolling are than λ value 1.20~1.35;
S102, with D1、D2、D3、D4, d indicate that small baffle ring outer diameter, ring round estrade small end outer diameter, ring round estrade are big respectively Outer diameter, big baffle ring outer diameter, ring internal diameter are held, the taper of ring round estrade is indicated with θ, with B, B1、B2、B3Ring in indicating respectively The total height of part, the height of small baffle ring, the height of ring round estrade, the height of big baffle ring, with V, V1、V2、 V3In indicating respectively The total volume of ring part, the volume of small baffle ring, the volume of ring round estrade, the volume of big baffle ring, then have B=B1+B2+B3, V= V1+V2+V3
S103, with D10、D20、D30、D40、d0Respectively indicate the outer diameter of ring billet small cylinder, the small round estrade bigger diameter end of ring billet The internal diameter of the outer diameter of the big round estrade bigger diameter end of outer diameter, ring billet, the outer diameter of the big cylinder of ring billet, ring billet, with B0、B10、B20、 B30、 B40Indicate respectively ring billet total height, the height of ring billet small cylinder, the small round estrade of ring billet the big round estrade of height, ring billet height The height of degree, the big cylinder of ring billet, with V0、V10、V20、V30、V40The total volume of ring billet, the body of ring billet small cylinder are indicated respectively The volume of the big cylinder of product, ring billet of long-pending, the small round estrade of ring billet the big round estrade of volume, ring billet;
Ring billet height designs:B0=B10+B20+B30+B40, B10=B1(0.2~0.9) mm,
B40=B3(0.2~0.9) mm, B2=B20+B30
Ring billet volume meets:V0=V10+V20+V30+V40, V10=V1, V40=V3, V20+V30=V2, V20=(0.2~ 0.4)V2, V10/V20=V1/V2
Ring billet internal diameter:d0=d/ λ;
Ring billet outer diameter designs:
D40≥D30≥D20≥D10
According to the above technical scheme, step S2 includes driven roller design, and the working size of driven roller includes:
Driven roller work radius surface Rd=500Vd/πnd, VdFor driven roller linear velocity, nd=n/ η are driven roller rotating speed, and n is Equipment motor rotating speed, η are equipment speed reducer drive ratio;
Driven roller cavity height:The big cylinder height B of driven rollerd1=B1, driven roller round estrade height Bd2=B2, driven roller Small cylinder height Bd3=B3
Driven roller cavity lateral width:
The semidiameter of driven roller upper flange and the big cylinder of driven roller
The semidiameter of the big cylinder of driven roller and driven roller round estrade bigger diameter end
The semidiameter of driven roller round estrade miner diameter end and driven roller small cylinder
The semidiameter of driven roller small cylinder and driven roller lower flange
Draw taper:Driven roller upper flange draw taper αd1=3 °~6 °, driven roller lower flange draw taper αd2=3 °~ 6 °, the taper theta of driven roller round estraded=θ.
According to the above technical scheme, VdTake 1.1~1.6m/s.
According to the above technical scheme, step S2 includes the design of core roller, and the working size of core roller includes:
Core roller work radius surface RiMeet
Core roll shape chamber height Bi=B+0.2mm,
Core roller sidewall width
Core roller draw taper αi=3 °~6 °.
According to the above technical scheme, step S2 includes the design of core roller, considers that the limit of equipment is closed centre-to-centre spacing limitation, driven roller Work radius surface RdWith core roller work radius surface RiIt is checked as the following formula:
Wherein, LmaxWith LminIt is that the greatest limit that equipment allows is closed centre-to-centre spacing and least limit closure centre-to-centre spacing.
According to the above technical scheme, step S2 includes guide roller design, and the working size of guide roller includes:
Guide roller work radius surface Rg=Sg4+ (2~5) mm,
Guide roller cavity height:The big cylinder height B of guide rollerg1=Bd1, guide roller round estrade height Bg2=Bd2, it is oriented to Roller small cylinder height Bg3=Bd3,
Guide roller cavity lateral width:The semidiameter S of guide roller upper flange and the big cylinder of guide rollerg1=Sd1,
The semidiameter S of the big cylinder of guide roller and guide roller round estrade bigger diameter endg2=Sd2,
The semidiameter S of guide roller round estrade miner diameter end and guide roller small cylinderg3=Sd3,
The semidiameter S of guide roller small cylinder and guide roller lower flangeg4=Sd4,
Draw taper:Guide roller upper flange draw taper αg1=3 °~6 °, guide roller lower flange punch-pin gradient αg2=3 °~ 6 °, the taper theta of guide roller round estradeg=θ.
According to the above technical scheme, step S2 includes cold-rolled process design, and cold-rolled process is fed using three stage stageds, point Three phases are fed for high speed feed, middling speed feeding and low speed, each stage amount of feeding and feed speed are designed and controlled as the following formula:
High speed feed amount Δ h1=0.3 Δ h, high speed feed speed ν1=(1.5~3) νmin
Middling speed amount of feeding Δ h2=0.6 Δ h, middling speed feed speed ν2=(1.5~2) νmin
Low speed amount of feeding Δ h3=0.1 Δ h, low speed feed speed ν3=(0.2~1) νmin
Wherein, Δ h is rolling total feed amount, νminFor least limit feed speed,
The beneficial effect comprise that:The present invention is based on accurate cold rolling ring billet and hole type design is closed, in conjunction with reasonable Cold-rolled process planning, asymmetric inner cone cross-sectional profile precision form may be implemented, compared to tradition simplify cross sectional shape forming, The metal streamline being distributed along cross section profile profiling can be obtained, and reduces the destruction of follow-up cutting flow line integrality, simultaneously Cutting material and expenditure of time can be reduced, to enhance product performance, stock utilization and production efficiency.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of inner ring ring in the embodiment of the present invention;
Fig. 2 is inner ring Cold ring roll Forming Theory figure in the embodiment of the present invention;
Fig. 3 is the sectional view of the line A-A along Fig. 2;
Fig. 4 is the structural schematic diagram of ring billet in the embodiment of the present invention;
Fig. 5 is the structural schematic diagram of driven roller in the embodiment of the present invention;
Fig. 6 is the structural schematic diagram of core roller of the embodiment of the present invention;
Fig. 7 is the structural schematic diagram of guide roller in the embodiment of the present invention;
Fig. 8 is that inner ring Cold ring roll feeds regulation schematic diagram in the embodiment of the present invention.
In figure:1- driven rollers, 2- core rollers, 3- inner ring rings, 4- guide rollers.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not For limiting the present invention.
A kind of tapered roller bearing internal ring cold roll forming method, as shown in Figure 1, inner ring ring include ring round estrade and Small baffle ring positioned at ring round estrade miner diameter end and the big baffle ring positioned at ring round estrade bigger diameter end, inner ring ring is interior to be equipped with ring Cylindrical hole, this approach includes the following steps:
S1, ring billet design:The cross sectional shape of ring billet reflects the original allocation feature of metal volume, also contribute to ring billet with Pass contact mode has a major impact operation of rolling metal flow and process force stability.For in taper roll bearing Cold rolling is enclosed, in order to be conducive to section forming, while controlled rolling process stability, ring billet cross sectional shape are designed as a kind of outer surface Both sides are with the frustum composite construction of step, middle section with taper, and both ends step part is rectangular section, middle section end is Tapered cross-section, as shown in figure 4, ring billet to be divided into the ring billet small cylinder being smoothly connected, the small round platform of ring billet along short transverse The big round estrade of body, ring billet and the big cylinder of ring billet, the height of ring billet small cylinder are slightly less than the height of small baffle ring, the big cylinder of ring billet The height of body is slightly less than the height of big baffle ring, and the sum of height of the small round estrade of ring billet and the big round estrade of ring billet is equal to ring round estrade Height, be based on constancy of volume principle, according to each size of each size design ring billet of inner ring ring;
S2, cold roll forming:Rolling groove design includes that pass structure and working size design, i.e., driven roller, core roller and leads To the structure and working size of roller, in order to inhibit ring billet in the operation of rolling to generate axial float or overturning because of discontinuity, Ensure that forming ring end face flatness, rolling groove use half-closed pass structure simultaneously, driven roller, core roller and guide roller are all provided with It is calculated as I-shaped structure, the shape of working surface of driven roller and guide roller is consistent with the external surface shape of inner ring ring, the work of core roller It is consistent with the inner surface configuration of inner ring ring to make face shape, as shown in Figure 2 and Figure 3, cold rolling pass is by driven roller 1, core roller 2 and leads It is formed to the working face of roller 4, the shape of working surface of driven roller and guide roller is consistent with inner ring ring external surface shape, the work of core roller It is consistent with inner ring ring inner surface configuration to make face shape, ring billet is put between driven roller and core roller, and is carried out by guide roller It is oriented to, the flange of driven roller, core roller and guide roller upper and lower ends carries out axial constraint to the both ends of the surface of ring billet respectively, and driven roller is done Rotary motion, while core roller does radial feed movement, carries out cold roll forming to ring billet, obtains inner ring ring 3.
In a preferred embodiment of the invention, in step S1, ring billet size design specifically includes following steps:
S101, using the ratio between cold roll forming ring internal diameter and ring billet internal diameter as rolling than λ, i.e. λ=d/d0, rolling is than reflection Ring billet cold-rolling deformation degree is excessive, and excessive rolling ratio can make material damage or even crack because of large plastometric set, mistake Small rolling ratio, which cannot make metal fully fill rolling groove, makes the complete forming in section, for tapered roller bearing internal ring cold rolling, In order to inhibit material damage to crack while be conducive to section forming, rolling should be controlled than λ in 1.20~1.35 ranges;
S102, as shown in Figure 1, with D1、D2、D3、D4, d indicate small baffle ring outer diameter, ring round estrade small end outer diameter, ring respectively Part round estrade big end outer diameter, big baffle ring outer diameter, ring internal diameter, the taper of ring round estrade are indicated with θ, with B, B1、B2、B3Respectively The total height of inner ring ring, the height of small baffle ring, the height of ring round estrade, the height of big baffle ring are indicated, with V, V1、V2、V3Point Not Biao Shi the total volume of inner ring ring, the volume of small baffle ring, the volume of ring round estrade, the volume of big baffle ring, then have B=B1+B2 +B3, V=V1+V2+V3
S103, as shown in figure 4, with D10、D20、D30、D40、d0Outer diameter, the small round platform of ring billet of ring billet small cylinder are indicated respectively The internal diameter of the outer diameter of the big round estrade bigger diameter end of the outer diameter of body bigger diameter end, ring billet, the outer diameter of the big cylinder of ring billet, ring billet, with B0、 B10、B20、B30、B40Ring billet total height, the height of ring billet small cylinder, the height of the small round estrade of ring billet, ring billet great circle are indicated respectively The height of the big cylinder of height, ring billet of stage body, with V0、V10、V20、V30、V40Total volume, the ring billet roundlet of ring billet are indicated respectively The volume of the big cylinder of product, ring billet of the big round estrade of volume, ring billet of the small round estrade of volume, ring billet of cylinder;
Ring billet height designs:B0=B10+B20+B30+B40, B10=B1(0.2~0.9) mm,
B40=B3(0.2~0.9) mm, B2=B20+B30
Ring billet volume meets:V0=V10+V20+V30+V40, V10=V1, V40=V3, V20+V30=V2, V20=(0.2~ 0.4)V2, V10/V20=V1/V2
Ring billet internal diameter:d0=d/ λ;
Ring billet outer diameter designs:
D40≥D30≥D20≥D10
In a preferred embodiment of the invention, step S2 includes driven roller design, as shown in figure 5, the work ruler of driven roller It is very little to include:
Driven roller work radius surface Rd=500Vd/πnd, VdFor driven roller linear velocity, 1.1~1.6m/s, n are usually takend=n/ η is driven roller rotating speed, and n is equipment motor rotating speed, and η is equipment speed reducer drive ratio;
Driven roller cavity height:The big cylinder height B of driven rollerd1=B1, driven roller round estrade height Bd2=B2, driven roller Small cylinder height Bd3=B3
Driven roller cavity lateral width:
The semidiameter of driven roller upper flange and the big cylinder of driven roller
The semidiameter of the big cylinder of driven roller and driven roller round estrade bigger diameter end
The semidiameter of driven roller round estrade miner diameter end and driven roller small cylinder
The semidiameter of driven roller small cylinder and driven roller lower flange
Draw taper:Driven roller upper flange draw taper αd1=3 °~6 °, driven roller lower flange draw taper αd2=3 °~ 6 °, the taper theta of driven roller round estraded=θ.
In a preferred embodiment of the invention, step S2 includes the design of core roller, as shown in fig. 6, the working size packet of core roller It includes:
Core roller work radius surface RiMeet
Core roll shape chamber height Bi=B+0.2mm,
Core roller sidewall width
Core roller draw taper αi=3 °~6 °.
In a preferred embodiment of the invention, step S2 includes the design of core roller, considers that the limit of equipment is closed centre-to-centre spacing limit System, driven roller work radius surface RdWith core roller work radius surface RiIt is checked as the following formula:
Wherein, LmaxWith LminIt is that the greatest limit that equipment allows is closed centre-to-centre spacing and least limit closure centre-to-centre spacing.
In a preferred embodiment of the invention, step S2 includes guide roller design, as shown in fig. 7, the work ruler of guide roller It is very little to include:
Guide roller work radius surface Rg=Sg4+ (2~5) mm,
Guide roller cavity height:The big cylinder height B of guide rollerg1=Bd1, guide roller round estrade height Bg2=Bd2, it is oriented to Roller small cylinder height Bg3=Bd3,
Guide roller cavity lateral width:The semidiameter S of guide roller upper flange and the big cylinder of guide rollerg1=Sd1,
The semidiameter S of the big cylinder of guide roller and guide roller round estrade bigger diameter endg2=Sd2,
The semidiameter S of guide roller round estrade miner diameter end and guide roller small cylinderg3=Sd3,
The semidiameter S of guide roller small cylinder and guide roller lower flangeg4=Sd4,
Draw taper:Guide roller upper flange draw taper αg1=3 °~6 °, guide roller lower flange punch-pin gradient αg2=3 °~ 6 °, the taper theta of guide roller round estradeg=θ.
Cold-rolled process planning predominantly planning rolling feeding regulation, i.e., carry out the amount of feeding in the operation of rolling and feed speed Design control, it suffers from rolling process stability, rolling accuracy and rolling efficiency important influence, for taper roller Bearing inner race cold rolling should ensure rolling process stability, while take into account rolling accuracy and rolling efficiency first, as shown in figure 8, In the preferred embodiment of the present invention, cold-rolled process is fed using three stage stageds, is divided into high speed feed, middling speed feeding and low speed Three phases are fed, each stage amount of feeding and feed speed are designed and controlled as the following formula:
High speed feed amount Δ h1=0.3 Δ h, high speed feed speed ν1=(1.5~3) νmin
Middling speed amount of feeding Δ h2=0.6 Δ h, middling speed feed speed ν2=(1.5~2) νmin
Low speed amount of feeding Δ h3=0.1 Δ h, low speed feed speed ν3=(0.2~1) νmin
Wherein, Δ h is rolling total feed amount, νminFor least limit feed speed,
Using certain model taper roll bearing as object, d, D of the tapered roller bearing internal ring of cold roll forming are needed1、D2、 D3、D4Respectively 45.17mm, 53.9mm, 52.1mm, 58.6mm, 63mm, B, B1、B2、B3Respectively 26.1mm, 3.9mm, 17.7mm, 4.5mm, taper theta are 9.31 °, by method provided by the present invention design cold rolling ring billet, pass and planning cold rolling feeding Regulation.
The present invention includes the following steps:
(1) cold rolling ring billet:Rolling selects 1.28 than λ, and it is as follows that each size of ring billet is calculated:d0、D10、D20、D30、D40Respectively For 35.3mm, 47mm, 47mm, 48.7mm, 57.1mm, B0、B10、B20、B30、B40Respectively 25mm, 3.5mm, 5.5mm, 11.7mm、4.3mm;
(2) cold rolling pass:Choose driven roller linear velocity VdFor 1.5mm/s, according to equipment motor and speed reducer parameter and The limit is closed centre-to-centre spacing, determines driven roller radius of clean-up RdFor 107mm, cavity height B is determineddFor 26.1mm, Bd1For 3.9mm, Bd2For 17.7mm, Bd3For 4.5mm, type groove sidewall width Sd1For 1.8mm, Sd2For 0.98mm, Sd3For 2.6mm, Sd4For 6.4mm, Taper thetadIt is 9.31 °, draw taper αd1、αd2It is 6 °, determines core roller radius of clean-up RiFor 13mm, cavity height BiFor 26.4mm, small end sidewall width SiFor 1.9mm, draw taper αiIt is 6 °, determines guide roller radius of clean-up RgFor 10mm, cavity height Spend BgFor 26.1mm, Bg1For 3.9mm, Bg2For 17.7mm, Bg3For 4.5mm, type groove sidewall width Sg1For 1.8mm, Sg2For 0.98mm, Sg3For 2.6mm, Sg4For 6.4mm, taper thetagIt is 9.31 °, draw taper αg1It is 6 °, αg2It is 4 °;
(3) cold rolling feeds regulation:In conjunction with the above parameter, determine total feed amount Δ h for 2.385mm, minimum feed speed pole Limit vminFor 0.309mm/s, then high speed feed stage amount of feeding Δ h1For 0.72mm, feed speed v1For 0.7mm/s, middling speed feeding Stage amount of feeding Δ h2For 1.43mm, feed speed v2For 0.5mm/s, low speed feeds stage amount of feeding Δ h3For 0.235mm, into Give speed v3For 0.2mm/s.
Compared with simplifying forming rectangular cross sectional shape roll forming process with conical bearing roller inner ring tradition, above-mentioned implementation Example uses method of the present invention, can save material about 35.7%, saves machining period about 3min.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description, And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.

Claims (8)

1. a kind of tapered roller bearing internal ring cold roll forming method, inner ring ring includes ring round estrade and is located at ring round platform The small baffle ring of body miner diameter end and big baffle ring positioned at ring round estrade bigger diameter end are equipped with ring cylindrical hole in inner ring ring, It is characterized in that, includes the following steps:
S1, ring billet design:Ring billet is divided into along short transverse the ring billet small cylinder being smoothly connected, the small round estrade of ring billet, The big round estrade of ring billet and the big cylinder of ring billet, the height of ring billet small cylinder are slightly less than the height of small baffle ring, the big cylinder of ring billet Height be slightly less than the height of big baffle ring, the sum of the height of the small round estrade of ring billet and the big round estrade of ring billet is equal to ring round estrade Highly, it is based on constancy of volume principle, according to each size of each size design ring billet of inner ring ring;
S2, cold roll forming:Rolling groove uses half-closed pass structure, and driven roller, core roller and guide roller are both designed as I-shaped The shape of working surface of structure, driven roller and guide roller is consistent with the external surface shape of inner ring ring, the shape of working surface of core roller with The inner surface configuration of inner ring ring is consistent, and ring billet is put between driven roller and core roller, and is oriented to by guide roller, driving The flange of roller, core roller and guide roller upper and lower ends carries out axial constraint to the both ends of the surface of ring billet respectively, and driven roller rotates, Core roller does radial feed movement simultaneously, carries out cold roll forming to ring billet, obtains inner ring ring.
2. tapered roller bearing internal ring cold roll forming method according to claim 1, which is characterized in that in step S1, ring Base size design specifically includes following steps:
S101, design rolling are than λ value 1.20~1.35;
S102, with D1、D2、D3、D4, d indicate small baffle ring outer diameter, ring round estrade small end outer diameter respectively, outside ring round estrade big end Diameter, big baffle ring outer diameter, ring internal diameter, the taper of ring round estrade are indicated with θ, with B, B1、B2、B3Inner ring ring is indicated respectively Total height, the height of small baffle ring, the height of ring round estrade, the height of big baffle ring, with V, V1、V2、V3Inner ring ring is indicated respectively Total volume, small baffle ring volume, the volume of ring round estrade, the volume of big baffle ring, then have B=B1+B2+B3, V=V1+V2+ V3
S103, with D10、D20、D30、D40、d0Indicate respectively the outer diameter of ring billet small cylinder, the small round estrade bigger diameter end of ring billet it is outer The internal diameter of the outer diameter of the big round estrade bigger diameter end of diameter, ring billet, the outer diameter of the big cylinder of ring billet, ring billet, with B0、B10、B20、B30、B40Point It Biao Shi not ring billet total height, the height of ring billet small cylinder, the height of the big round estrade of height, ring billet of the small round estrade of ring billet, ring The height of the big cylinder of base, with V0、V10、V20、V30、V40The total volume of ring billet, the volume of ring billet small cylinder, ring are indicated respectively The volume of the big cylinder of product, ring billet of the big round estrade of volume, ring billet of the small round estrade of base;
Ring billet height designs:B0=B10+B20+B30+B40, B10=B1(0.2~0.9) mm, B40=B3(0.2~0.9) mm, B2= B20+B30
Ring billet volume meets:V0=V10+V20+V30+V40, V10=V1, V40=V3, V20+V30=V2, V20=(0.2~0.4) V2, V10/V20=V1/V2
Ring billet internal diameter:d0=d/ λ;
Ring billet outer diameter designs:
D40≥D30≥D20≥D10
3. tapered roller bearing internal ring cold roll forming method according to claim 1, which is characterized in that step S2 includes driving Dynamic roller design, the working size of driven roller include:
Driven roller work radius surface Rd=500Vd/πnd, VdFor driven roller linear velocity, nd=n/ η are driven roller rotating speed, and n is equipment Motor speed, η are equipment speed reducer drive ratio;
Driven roller cavity height:The big cylinder height B of driven rollerd1=B1, driven roller round estrade height Bd2=B2, driven roller roundlet Height of column Bd3=B3
Driven roller cavity lateral width:
The semidiameter of driven roller upper flange and the big cylinder of driven roller
The semidiameter of the big cylinder of driven roller and driven roller round estrade bigger diameter end
The semidiameter of driven roller round estrade miner diameter end and driven roller small cylinder
The semidiameter of driven roller small cylinder and driven roller lower flange
Draw taper:Driven roller upper flange draw taper αd1=3 °~6 °, driven roller lower flange draw taper αd2It=3 °~6 °, drives The taper theta of dynamic roller round estraded=θ.
4. tapered roller bearing internal ring cold roll forming method according to claim 3, which is characterized in that VdTake 1.1~ 1.6m/s。
5. tapered roller bearing internal ring cold roll forming method according to claim 3, which is characterized in that step S2 includes core Roller designs, and the working size of core roller includes:
Core roller work radius surface RiMeet
Core roll shape chamber height Bi=B+0.2mm,
Core roller sidewall width
Core roller draw taper αi=3 °~6 °.
6. tapered roller bearing internal ring cold roll forming method according to claim 5, which is characterized in that step S2 includes core Roller designs, and considers that the limit of equipment is closed centre-to-centre spacing limitation, driven roller work radius surface RdWith core roller work radius surface RiAs the following formula It is checked:
Wherein, LmaxWith LminIt is that the greatest limit that equipment allows is closed centre-to-centre spacing and least limit closure centre-to-centre spacing.
7. tapered roller bearing internal ring cold roll forming method according to claim 5, which is characterized in that step S2 includes leading It is designed to roller, the working size of guide roller includes:
Guide roller work radius surface Rg=Sg4+ (2~5) mm,
Guide roller cavity height:The big cylinder height B of guide rollerg1=Bd1, guide roller round estrade height Bg2=Bd2, guide roller is small Cylinder height Bg3=Bd3,
Guide roller cavity lateral width:The semidiameter S of guide roller upper flange and the big cylinder of guide rollerg1=Sd1,
The semidiameter S of the big cylinder of guide roller and guide roller round estrade bigger diameter endg2=Sd2,
The semidiameter S of guide roller round estrade miner diameter end and guide roller small cylinderg3=Sd3,
The semidiameter S of guide roller small cylinder and guide roller lower flangeg4=Sd4,
Draw taper:Guide roller upper flange draw taper αg1=3 °~6 °, guide roller lower flange punch-pin gradient αg2It=3 °~6 °, leads To the taper theta of roller round estradeg=θ.
8. tapered roller bearing internal ring cold roll forming method according to claim 7, which is characterized in that step S2 includes cold Process Design is rolled, cold-rolled process is fed using three stage stageds, is divided into high speed feed, middling speed feeding and low speed and is fed three ranks Section, each stage amount of feeding and feed speed are designed and are controlled as the following formula:
High speed feed amount Δ h1=0.3 Δ h, high speed feed speed ν1=(1.5~3) νmin
Middling speed amount of feeding Δ h2=0.6 Δ h, middling speed feed speed ν2=(1.5~2) νmin
Low speed amount of feeding Δ h3=0.1 Δ h, low speed feed speed ν3=(0.2~1) νmin
Wherein, Δ h is rolling total feed amount, νminFor least limit feed speed,
CN201810401252.3A 2018-04-28 2018-04-28 A kind of tapered roller bearing internal ring cold roll forming method Pending CN108672619A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111318630A (en) * 2020-03-18 2020-06-23 武汉理工大学 Near-net composite rolling forming method for inner ring of tapered roller bearing

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JP2004181523A (en) * 2002-12-06 2004-07-02 Kyoei Seiko Kk Apparatus for forming ring body
JP2006055894A (en) * 2004-08-23 2006-03-02 Kyoei Seiko Kk Method and apparatus for forming ring body
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111318630A (en) * 2020-03-18 2020-06-23 武汉理工大学 Near-net composite rolling forming method for inner ring of tapered roller bearing
CN111318630B (en) * 2020-03-18 2021-07-20 武汉理工大学 Near-net composite rolling forming method for inner ring of tapered roller bearing

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Application publication date: 20181019