CN107657122A - Machine tool chief axis Design of Cylindrical Roller Bearing method - Google Patents
Machine tool chief axis Design of Cylindrical Roller Bearing method Download PDFInfo
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- CN107657122A CN107657122A CN201710910300.7A CN201710910300A CN107657122A CN 107657122 A CN107657122 A CN 107657122A CN 201710910300 A CN201710910300 A CN 201710910300A CN 107657122 A CN107657122 A CN 107657122A
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Abstract
The invention discloses a kind of machine tool chief axis Design of Cylindrical Roller Bearing method, comprise the following steps：1. the basic appearance and size principal parameter of bearing determines：According to basic appearance and size d, D, B, r and r1 of the GB283-87 and GB274-82 cylinder roller bearings chosen；2. the optimization design of principal parameter：Optimized using bearing dynamic load rating as object function；3. rated load designs, radial direction dynamic load rating and radial direction basic static capacity (BSC) rating calculation formula are established；4. the design of roller centre circular diameter and roller, establish 4 calculation formula；5. inner ring and the design of outer ring, establish 2 calculation formula；6. retainer designs, 3 calculation formula are established.Machine tool chief axis cylinder roller bearing service life of the present invention improves 25% than the service life of prior art bearing, and precision and rigidity are high, and product is applied to machine tool chief axis, and performance is good.
Description
Technical field
The present invention relates to a kind of cylinder roller bearing field, more particularly, to a kind of machine tool chief axis Design of Cylindrical Roller Bearing
Method.
Background technology
Cylinder roller bearing, is cylindrical roller and raceway is line contact bearing, and load-bearing capacity is big, is primarily subjected to radially negative
Lotus, rolling element and the friction of lasso rib are small, are not only suitable for bearing heavy load and shock loading, are also applied for rotating at a high speed, simultaneously
The lubricating condition of roller end face and rib contact area is improved, improves the performance of bearing, is applied in general to big-and-middle-sized
Motor, rolling stock, machine tool chief axis, internal combustion engine, generator, combustion gas turbine, reduction box, rolling mill, vibratory sieve and rise
Weight Transport Machinery etc..Cylinder roller bearing as one of important spare part in modern production equipment, due to its can bear compared with
High radial load, it is widely used in the equipment of the load of the superelevation such as metallurgical machinery and moderate rotation.
Critical component of the main shaft as lathe, its performance can directly influence running accuracy, rotating speed, rigidity, the temperature of lathe
The parameter such as liter and noise, and then the crudy of workpiece is influenceed, for example (,) the index such as the dimensional accuracy of part, surface roughness, mesh
The preceding main shaft bearing selected on the market includes angular contact ball bearing, taper roll bearing, and the type such as cylinder roller bearing, is
Holding outstanding machine tooling ability, it is necessary to the high performance bearing of adapted, while the service life of bearing is the important of bearing
Quality index, it is related to the reliability of bearing, turns into the target of people's pursuit.
The content of the invention
For the main shaft cylinder roller bearing deficiency for overcoming above-mentioned existing machine tool chief axis to select, the present invention provides a kind of lathe
Main shaft Design of Cylindrical Roller Bearing method, by the basic appearance and size principal parameter of the bearing, optimization design of principal parameter, specified
Design, inner ring and the design of outer ring and the retainer design of load design, roller centre circular diameter and roller, product service life
Service life than prior art bearing improves 25%, and precision and rigidity are high, and product is applied to machine tool chief axis, and performance is good.
To reach above-mentioned purpose, the invention provides a kind of technical scheme：
A kind of machine tool chief axis Design of Cylindrical Roller Bearing method, comprises the following steps：
1. the basic appearance and size principal parameter of bearing determines：The cylindrical roller chosen according to GB283-87 and GB274-82
Basic appearance and size d, D, B, r and r1 of bearing；
2. the optimization design of principal parameter：Using maximum life span as optimization aim in bearing optimization design, and by bearing
Knowable to life formula, size of the bearing life depending on its dynamic load rating, therefore machine tool chief axis cylinder roller bearing
Optimization design target is that dynamic load rating is maximum；
3. rated load designs, 2 calculation formula are established：
The calculation formula of radial direction dynamic load rating：Cr=fcLwe7/9·Z3/4·Dwe29/27；
The calculation formula of radial direction basic static capacity (BSC) rating：Cor=21.6ZLweDwe；
Wherein, it is geometry, the accuracy of manufacture and material with bearing parts according to the GB/T6391-1995 fc chosen
Relevant coefficient；
4. the design of roller centre circular diameter and roller：
Dpw=(di+De)；
Dwe=KD (D-d), COEFFICIENT K D take 0.24~0.29；
Lw=KLDwe, COEFFICIENT K L take 1~1.67；
5. inner ring and the design of outer ring：
(a) inner ring raceway diameter di calculation formula (value precision 0.001)：Di=Dpw-Dwe；
(b) outer ring raceway diameter De calculation formula (value precision 0.001)：De=di+2Dwe；
6. the design of retainer, establish 3 calculation formula：
Retainer center circle diameter Dcp calculation formula：Dcp=Dpw；
Beam thickness Sc calculation formula in retainer steel plate：Sc=Ks × Dw, wherein Ks values 0.23~0.27；
Retainer outer diameter D c calculation formula：Dc=Dcp+Kc × Dw, wherein Kc values 0.33~0.75；
Wherein：
D- bearing bore diameter D- bearing outside diameters
The inside and outside circle chamfer dimesion of B- bearing width r- bearings
Inside and outside circle (back-up ring) narrow end surface chamfer dimesion Lwe- roller effective lengths of r1- bearings
Di- inner ring raceway diameter De- outer ring raceway diameters
Dpw- roller centre circular diameter Dwe- roller diameters
Lw- roller length Z- roller numbers.
Further, in addition to Design of profiled rollers, roller use circular arc modified line bus repairing type, the calculating public affairs of convexity amount
Formula：δ=3.83 × 10- 5(5Pr/Z)0.9/ (Lw-2Lm)0.8, wherein Pr is bearing equivalent radial load, and Lm is convex for amendment bus
Spend measurement point partial-length.
Preferably, machine tool chief axis cylinder roller bearing be inner ring single block border cylinder roll in bearing NJ types or inner ring single block border,
Band separate thrust collar cylinder is rolled when bearing NH types (NJ+HJ), and KD takes 0.24~0.28；Machine tool chief axis cylinder roller bearing is inner ring list
When rib, band loose rib cylinder roller bearing NUP types or outer ring single block border cylinder roller bearing NF types, KD takes 0.25~0.29.
Preferably, machine tool chief axis cylinder roller bearing be inner ring single block border cylinder roll in bearing NJ types or inner ring single block border,
Band separate thrust collar cylinder is rolled when bearing NH types (NJ+HJ), and KL takes 1~1.2；Machine tool chief axis cylinder roller bearing keeps off for inner ring list
When side, band loose rib cylinder roller bearing NUP types or outer ring single block border cylinder roller bearing NF types, KL takes 1.36~1.67.
Further, 3 calculation formula are established：
Outer ring raceway width E calculation formula：E=Lw；
Inner ring raceway width E1 calculation formula：E1=B-2 (B-E)；
Inner ring rib internal diameter：D2=KD2× Dwe+0.3, wherein KD2Value 0.3~0.4.
Further, using roller bearing and Life Relation formula, the longevity of calculation bearing different clearance under certain loads
Life value, life-span and clearance relation curve are drawn, draw using negative clearance, the life-span can be extended, when loading ability of bearing condition is identical,
Reduce with end-play, the increase of bearing load angle of distribution, the increase of carrier roller quantity, roller Maximum Contact load is reduced, inside and outside
Relatively radially displacement reduces circle.
The present invention is beneficial to be had technical effect that：
1st, the present invention by designing the basic appearance and size principal parameter, the optimization design of principal parameter, rated load of bearing,
Design, inner ring and the design of outer ring and the retainer design of roller centre circular diameter and roller, product service life is than existing skill
The service life of art bearing improves 25%, and precision and rigidity are high, and product is applied to machine tool chief axis, and performance is good.
2nd, cylinder roller bearing of the present invention, when loading ability of bearing condition is identical, subtracts using negative clearance with end-play
Small, the increase of bearing load angle of distribution, the increase of carrier roller quantity, roller Maximum Contact load reduces, Internal and external cycle relatively radially position
Shifting amount reduces, it is possible to achieve the high rigidity of lathe roller, high accuracy, the revolution of high rotating speed；Still further aspect is swum using roller bearing
Gap and Life Relation formula, the life-span numerical value of several groups of bearings different clearance under certain loads is calculated, draw the life-span closes with clearance
It is curve, draws using negative clearance, the life-span can be extended.
3rd, in the overall structure of cylinder roller bearing, roller is an important part, and the design of roller is fine or not
It is the most important thing of cylinder roller bearing performance quality, the present invention ensures the finish on its surface when designing roller structure, closes
Reason designs the convexity amount of roller, and optimization roller is easy to roll.
4th, cylindrical roller and raceway are in linear contact lay, and radial capacity is big, is not only suitable for bearing heavy load and shock loading,
It is also applied for rotating at a high speed.Cylinder roller bearing raceway and rolling element are in geometry, after the improved design of the present invention, have compared with
The new structural design of high bearing capacity, rib and roller end face, the axial carrying capacity of bearing is not only increased, is changed simultaneously
It has been apt to the lubricating condition of roller end face and rib contact area, has improved the performance of bearing.
Brief description of the drawings
Fig. 1 is a kind of design cycle schematic diagram of machine tool chief axis Design of Cylindrical Roller Bearing method
The contact stress figure of Fig. 2 simulations
Embodiment
The explanation of following embodiment is with reference to additional schema, to illustrate the particular implementation that the present invention can be used to implementation
Example.A kind of machine tool chief axis Design of Cylindrical Roller Bearing method of embodiment of the present invention is made further presently in connection with accompanying drawing
It is bright, a kind of design cycle schematic diagram of machine tool chief axis Design of Cylindrical Roller Bearing method as shown in Figure 1.
A kind of machine tool chief axis Design of Cylindrical Roller Bearing method, design procedure are as follows：
1. the basic appearance and size principal parameter of bearing：The cylinder roller bearing chosen according to GB283-87 and GB274-82
Basic appearance and size d, D, B, r and r1, wherein：In d- bearing bore diameters, D- bearing outside diameters, B- bearing widths, r- bearings,
Inside and outside circle (back-up ring) the narrow end surface chamfer dimesion of outer ring chamfer dimesion, r1- bearings.
2. the optimization design of principal parameter：Using maximum life span as optimization aim in bearing optimization design, and by bearing
Knowable to life formula, size of the bearing life depending on its dynamic load rating, therefore machine tool chief axis cylinder roller bearing
Optimization design target is that dynamic load rating is maximum.
3. rated load designs：
The calculation formula of radial direction dynamic load rating：Cr=fcLwe7/9·Z3/4·Dwe29/27；
The calculation formula of radial direction basic static capacity (BSC) rating：Cor=21.6ZLweDwe；
Wherein, it is geometry, the accuracy of manufacture and material with bearing parts according to the GB/T6391-1995 fc chosen
Relevant coefficient.
4. the design of roller centre circular diameter and roller：
Dpw, Dwe, Lw, Z first determine the height of outer ring by being drawn after computer optimization, further according to the diameter of roller, draw interior
The raceway diameter of circle.
Dpw=(di+De)
Dwe=KD (D-d), COEFFICIENT K D take 0.24~0.29, and machine tool chief axis cylinder roller bearing is inner ring single block border cylinder
Roll when bearing NJ types or inner ring single block border, band separate thrust collar cylinder are rolled in bearing NH types (NJ+HJ), KD takes 0.24~0.28；Machine
Bed main shaft cylinder roller bearing is inner ring single block border, band loose rib cylinder roller bearing NUP types or outer ring single block border cylindrical roller
During bearing NF types, KD takes 0.25~0.29.
Lw=KLDwe, COEFFICIENT K L take 1~1.67, machine tool chief axis cylinder roller bearing be inner ring single block border cylinder roll in
Bearing NJ types or inner ring single block border, band separate thrust collar cylinder are rolled when bearing NH types (NJ+HJ), and KL takes 1~1.2；Machine tool chief axis is justified
Post roller bearing is inner ring single block border, band loose rib cylinder roller bearing NUP types or outer ring single block border cylinder roller bearing NF types
When, KL takes 1.36~1.67.
Wherein：Dpw- roller centres circular diameter, Dwe- roller diameters, Lw- roller lengths, Z- roller numbers；
The present invention chooses the relatively a little bit smaller of roller diameter specification, and quantity is more, and rigidity is preferably.
The design of profiled rollers repairing type can use logarithm shape correction of the flank shape, can also use circular arc modified line bus repairing type, this
Invention uses circular arc modified line bus repairing type, the calculation formula of convexity amount：δ=3.83 × 10- 5(5Pr/Z)0.9/ (Lw-2Lm
)0.8, wherein Pr is bearing equivalent radial load, and Lm is amendment bus convex measuring point partial-length.
Outer ring raceway width E calculation formula：E=Lw；
Inner ring raceway width E1 calculation formula：E1=B-2 (B-E)；
Inner ring rib internal diameter：D2=KD2× Dwe+0.3, wherein KD2Value 0.3~0.4.
5. inner ring and the design of outer ring：
(a) inner ring raceway diameter di calculation formula (value precision 0.001)：Di=Dpw-Dwe；
(b) outer ring raceway diameter De calculation formula (value precision 0.001)：De=di+2Dwe；
Wherein：Di- inner ring raceways diameter, De- outer ring raceway diameters；
6. the design of retainer, establish 3 calculation formula：
Retainer center circle diameter Dcp calculation formula：Dcp=Dpw；
Beam thickness Sc calculation formula in retainer steel plate：Sc=Ks × Dw, wherein Ks values 0.23~0.27；
Retainer outer diameter D c calculation formula：Dc=Dcp+Kc × Dw, wherein Kc values 0.33~0.75.
Optimization process is included, and the following parameter of bearing is inputted computer by step 1.：
Roller bearing load Q=14670N, roller diameter Dwe=9.0mm, roller effective length Lwe=8.6mm, roller
Length Lw=10mm, inner ring raceway diameter di=86mm, outer ring raceway diameter De=104mm, bearing clearance Ur=0.04mm, rolling
Sub- number Z=25, away from end measurement point Lm=0.9mm.
Step 2. by computer calculate roller under loads with the contact stress situation of inner and outer ring and providing optimal
The logarithm contour curve data of change and the contact stress figure of simulation：
(1) while stand under load roller number is：9
(2) each roller loading conditions analysis in bearing：
(3) the convexity amount of measured point position roller：
Convexity amount at logarithm roller end 0.900mm is 4.352080 μm
(4) each stand under load roller and inner ring Max.contact stress in bearing：
The Max.contact stress of stand under load roller 1 is：1.768663GPa
The Max.contact stress of stand under load roller 2 is：1.726726GPa
The Max.contact stress of stand under load roller 3 is：1.602858GPa
The Max.contact stress of stand under load roller 4 is：1.378764GPa
The Max.contact stress of stand under load roller 5 is：1.015120GPa
(5) each stand under load roller and outer ring Max.contact stress in bearing：
The Max.contact stress of stand under load roller 1 is：1.612892GPa
The Max.contact stress of stand under load roller 2 is：1.574735GPa
The Max.contact stress of stand under load roller 3 is：1.458751GPa
The Max.contact stress of stand under load roller 4 is：1.256256GPa
The Max.contact stress of stand under load roller 5 is：0.9223952Pa
The contact stress figure of simulation, the contact stress figure such as accompanying drawing 2 of simulation are drawn according to logarithm contour curve data.
The present invention is using roller bearing and Life Relation formula, the life-span of calculation bearing different clearance under certain loads
Value, draws life-span and clearance relation curve, draws using negative clearance, can extend the life-span, when loading ability of bearing condition is identical, with
End-play reduces, the increase of bearing load angle of distribution, the increase of carrier roller quantity, and roller Maximum Contact load is reduced, Internal and external cycle
Relatively radially displacement reduces.
The technical concepts and features of embodiment of above only to illustrate the invention, its object is to allow be familiar with technique
People understands present disclosure and is carried out, and it is not intended to limit the scope of the present invention, all according to spirit of the invention
The equivalent change or modification that essence is done, it should all cover within the scope of the present invention.
Claims (6)
- A kind of 1. machine tool chief axis Design of Cylindrical Roller Bearing method, it is characterised in that：Comprise the following steps：1. the basic appearance and size principal parameter of bearing determines：The cylinder roller bearing chosen according to GB283-87 and GB274-82 Basic appearance and size d, D, B, r and r1；2. the optimization design of principal parameter：Principal parameter optimizes using bearing dynamic load rating as object function；3. rated load designs, 2 calculation formula are established：The calculation formula of radial direction dynamic load rating：Cr=fcLwe7/9·Z3/4·Dwe29/27；The calculation formula of radial direction basic static capacity (BSC) rating：Cor=21.6ZLweDwe；Wherein, fc is the coefficient relevant with the geometry, the accuracy of manufacture and material of bearing parts；4. the design of roller centre circular diameter and roller, establish 4 calculation formula：Dpw=(di+De)；Dwe=KD (D-d), COEFFICIENT K D take 0.24~0.29；Lw=KLDwe, COEFFICIENT K L take 1~1.67；<mrow> <mi>Z</mi> <mo>&le;</mo> <mfrac> <mrow> <mi>&pi;</mi> <mi>D</mi> <mi>p</mi> <mi>w</mi> </mrow> <mrow> <mn>1.3</mn> <mo>&times;</mo> <mi>D</mi> <mi>w</mi> <mi>e</mi> </mrow> </mfrac> <mo>;</mo> </mrow>5. inner ring and the design of outer ring：(a) inner ring raceway diameter di calculation formula：Di=Dpw-Dwe；(b) outer ring raceway diameter De calculation formula：De=di+2Dwe；6. the design of retainer, establish 3 calculation formula：Retainer center circle diameter Dcp calculation formula：Dcp=Dpw；Beam thickness Sc calculation formula in retainer steel plate：Sc=Ks × Dw, wherein Ks values 0.23~0.27；Retainer outer diameter D c calculation formula：Dc=Dcp+Kc × Dw, wherein Kc values 0.33~0.75；Wherein：D- bearing bore diameter D- bearing outside diametersThe inside and outside circle chamfer dimesion of B- bearing width r- bearingsInside and outside circle (back-up ring) narrow end surface chamfer dimesion Lwe- roller effective lengths of r1- bearingsDi- inner ring raceway diameter De- outer ring raceway diametersDpw- roller centre circular diameter Dwe- roller diametersLw- roller length Z- roller numbers.
- 2. machine tool chief axis Design of Cylindrical Roller Bearing method according to claim 1, it is characterised in that：It is convex also to include roller Degree design, roller use circular arc modified line bus repairing type, the calculation formula of convexity amount：δ=3.83 × 10- 5(5Pr/Z)0.9/ (Lw-2Lm)0.8, wherein Pr is bearing equivalent radial load, and Lm is amendment bus convexity away from end measurement point partial-length.
- 3. machine tool chief axis Design of Cylindrical Roller Bearing method according to claim 1, it is characterised in that：Machine tool chief axis cylinder Roller bearing is rolled for inner ring single block border cylinder and rolled in bearing NJ types or inner ring single block border, band separate thrust collar cylinder in bearing NH types (NJ+ When HJ), KD takes 0.24~0.28；Machine tool chief axis cylinder roller bearing is inner ring single block border, band loose rib cylinder roller bearing NUP When type or outer ring single block border cylinder roller bearing NF types, KD takes 0.25~0.29.
- 4. machine tool chief axis Design of Cylindrical Roller Bearing method according to claim 1, it is characterised in that：Machine tool chief axis cylinder Roller bearing is rolled for inner ring single block border cylinder and rolled in bearing NJ types or inner ring single block border, band separate thrust collar cylinder in bearing NH types (NJ+ When HJ), KL takes 1~1.2；Machine tool chief axis cylinder roller bearing be inner ring single block border, band loose rib cylinder roller bearing NUP types or During the single block border cylinder roller bearing NF types of outer ring, KL takes 1.36~1.67.
- 5. machine tool chief axis Design of Cylindrical Roller Bearing method according to claim 1, it is characterised in that：Establish 3 calculation formula：Outer ring raceway width E calculation formula：E=Lw；Inner ring raceway width E1 calculation formula：E1=B-2 (B-E)；Inner ring rib internal diameter：D2=KD2× Dwe+0.3, wherein KD2Value 0.3~0.4.
- 6. the machine tool chief axis Design of Cylindrical Roller Bearing method according to any one claim in claim 1-5, its It is characterised by：Using roller bearing and Life Relation formula, the life value of calculation bearing different clearance under certain loads, draw Life-span and clearance relation curve, draw using negative clearance, the life-span can be extended, when loading ability of bearing condition is identical, swum with radial direction Gap reduces, the increase of bearing load angle of distribution, the increase of carrier roller quantity, and roller Maximum Contact load is reduced, and Internal and external cycle is with respect to footpath Reduce to displacement.
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| CN201710910300.7A CN107657122B (en) | 2017-09-29 | 2017-09-29 | Method for designing cylindrical roller bearing of machine tool spindle |
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| CN201710910300.7A CN107657122B (en) | 2017-09-29 | 2017-09-29 | Method for designing cylindrical roller bearing of machine tool spindle |
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| CN108595765A (en) * | 2018-03-27 | 2018-09-28 | 明阳智慧能源集团股份公司 | Wind power generating set double-row conical bearing load is distributed and Life Calculating Methods |
| CN108984968A (en) * | 2018-08-22 | 2018-12-11 | 中国北方车辆研究所 | A kind of optimum design method and device of bearing fit tolerance |
| CN113468695A (en) * | 2021-07-20 | 2021-10-01 | 人本股份有限公司 | Convexity optimization design method of roller |
| CN113588267A (en) * | 2021-07-27 | 2021-11-02 | 成都飞机工业（集团）有限责任公司 | Electric main shaft bearing structure parameter inference method based on vibration spectrum analysis |
| CN113742858A (en) * | 2021-08-13 | 2021-12-03 | 钱潮轴承有限公司 | Method for quickly searching borrowed roller for tapered roller bearing design |
| CN114139320A (en) * | 2021-12-13 | 2022-03-04 | 洛阳新强联回转支承股份有限公司 | Roller design method for three-row cylindrical roller bearing |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108595765A (en) * | 2018-03-27 | 2018-09-28 | 明阳智慧能源集团股份公司 | Wind power generating set double-row conical bearing load is distributed and Life Calculating Methods |
| CN108984968A (en) * | 2018-08-22 | 2018-12-11 | 中国北方车辆研究所 | A kind of optimum design method and device of bearing fit tolerance |
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| CN113468695B (en) * | 2021-07-20 | 2023-08-25 | 人本股份有限公司 | Convexity optimization design method for roller |
| CN113588267A (en) * | 2021-07-27 | 2021-11-02 | 成都飞机工业（集团）有限责任公司 | Electric main shaft bearing structure parameter inference method based on vibration spectrum analysis |
| CN113588267B (en) * | 2021-07-27 | 2022-06-14 | 成都飞机工业（集团）有限责任公司 | Electric main shaft bearing structure parameter inference method based on vibration spectrum analysis |
| CN113742858A (en) * | 2021-08-13 | 2021-12-03 | 钱潮轴承有限公司 | Method for quickly searching borrowed roller for tapered roller bearing design |
| CN113742858B (en) * | 2021-08-13 | 2024-04-19 | 钱潮轴承有限公司 | Method for quickly searching borrowed roller for tapered roller bearing design |
| CN114139320A (en) * | 2021-12-13 | 2022-03-04 | 洛阳新强联回转支承股份有限公司 | Roller design method for three-row cylindrical roller bearing |
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