CN106552971B - The correction method of roller screws tooth in planetary roller screw pair - Google Patents
The correction method of roller screws tooth in planetary roller screw pair Download PDFInfo
- Publication number
- CN106552971B CN106552971B CN201611091503.XA CN201611091503A CN106552971B CN 106552971 B CN106552971 B CN 106552971B CN 201611091503 A CN201611091503 A CN 201611091503A CN 106552971 B CN106552971 B CN 106552971B
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- CN
- China
- Prior art keywords
- roller
- thread
- correction
- flank shape
- tooth
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G9/00—Working screws, bolt heads, or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw-thread
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
- F16H25/2252—Planetary rollers between nut and screw
Abstract
The invention discloses a kind of correction methods of roller screws tooth in planetary roller screw pair, and for solving in existing planetary roller screw pair, there are threads to carry technical problem that is uneven and causing service life short.Technical solution is to carry out contact analysis in the case of specified load to planetary roller screw pair using finite element analysis software, the maximum profiling quantity of roller screws tooth is obtained by analysis result, the roller after correction of the flank shape is designed by maximum profiling quantity.By to the roller screw and nut progress finite element contact analysis after correction of the flank shape, it obtains in the case where full payload is certain, roller after correction of the flank shape significantly reduces the load of roller, leading screw and nut load side thread, to reduce the adhesive wear and contact fatique wear that cause thread due to overload, and then improve the service life of planetary roller screw pair.
Description
Technical field
The present invention relates to a kind of correction method of roller screws tooth, more particularly to roller spiral shell in a kind of planetary roller screw pair
The correction method of line tooth.
Background technology
Referring to Fig.1-3.Planetary roller screw pair is a kind of machinery biography that can mutually convert rotary motion and linear motion
Dynamic device, planetary roller screw pair basic structure includes roller 1, leading screw 2, nut 3, ring gear 4 and retainer 5.Roller 1 is single
Line screw thread, in order to reduce friction, helicoid usually processes the round convex profile with larger contact radius.Roller 1 with
The helix angle of nut 3 is identical, without displacement to axial when ensureing that roller 1 rolls in nut 3.While in order to eliminate leading screw
The heeling moment that 2 helix angles generate roller 1 is machined with straight-tooth at 1 both ends of roller, is engaged with ring gear 4, to ensure roller
1 axis is parallel to 2 axis of leading screw and normally rolls.Retainer 5 makes roller 1 circumferentially be uniformly distributed.
In part correction of the flank shape technical aspect, there is the corrections of the flank shape technology such as gear modification and screw thread correction of the flank shape.Gear modification includes flank profil
Correction of the flank shape and axial modification are both general to apply on gear simultaneously.In general, gear modification is to make gear teeth meshing rigidity
Variation is relatively eased up, and reduction gear is engaging-in and nibbles out impact, and improving lubrication of tooth surface state prevents glued generation and raising engagement
Stationarity etc..In terms of screw thread correction of the flank shape, there is scholar to propose to go out the cone angle of certain angle in nut front end vehicle at present, from nut front end
Start radially slotted and groove depth at screw thread tooth base and cuts out one along helix even variation and on nut pressure-bearing surface
The screw threads profiling mode such as slot.Primarily to improving thread carrying distribution, final realize reduces threaded connection pair for screw thread correction of the flank shape
Maximum stress, extend the service life of screw thread pair.There are threads to carry non-uniform phenomenon in planetary roller screw pair.
The carrying schematic diagram of planetary roller screw pair roller screws tooth defines roller and is contacted at the nut load bearing face of side with nut
First thread of roller is T1, load maximum is born at thread T1, and load is concentrated mainly on preceding 3 threads, accounts for about
The 60%~70% of full payload.Planetary roller screw pair works in high overload, and part especially carrying can be caused to sidewinder
The 1st thread of column generates larger contact stress, and the contact stress between roller and leading screw and nut is larger, and is recycling
Under the contact stress effect of variation, it can accelerate its node of adhering that shear fracture occurs and generate adhesive wear, and accelerate due to material
Fatigue flake and form pit and cause contact fatique wear.The increasing of adhesive wear and contact fatique wear, can serious curtailment row
The service life of star roller screw pair.
Invention content
It carries uneven there are thread in existing planetary roller screw pair and causes service life short not to overcome
Foot, the present invention provide a kind of correction method of roller screws tooth in planetary roller screw pair.This method is the specified load the case where
Under, contact analysis is carried out to planetary roller screw pair using finite element analysis software, roller screws tooth is obtained by analysis result
Maximum profiling quantity designs the roller after correction of the flank shape by maximum profiling quantity.By to after correction of the flank shape roller screw and nut have
The first contact analysis of limit, show that, in the case where full payload is certain, the roller after correction of the flank shape significantly reduces roller, leading screw and nut
The load of load side thread, to reduce the adhesive wear and contact fatique wear that cause thread due to overload, into
And improve the service life of planetary roller screw pair.
The technical solution adopted by the present invention to solve the technical problems：Roller screws tooth in a kind of planetary roller screw pair
Correction method, its main feature is that including the following steps：
Step 1: planetary roller screw pair thread Contact.
The contact of planetary roller screw pair thread is analyzed using finite element method, obtains roller 1 and leading screw 2
With each thread load distribution in 3 contact position of nut, the axial displacement of the stress distribution of each contact point and contact point.According to screw thread
Tooth contact point axial displacement can obtain the order of magnitude of the maximum profiling quantity of 1 thread of roller.
Step 2: the correction of the flank shape process of roller screws tooth.
The correction of the flank shape of roller screws tooth be divided into roller 1 contacted with leading screw 2 correction of the flank shape for sidewindering 1 thread of column, half tooth and roller 1 with
Nut 3 contacts the correction of the flank shape for sidewindering 1 thread of column, half tooth.
Roller 1 contacts the correction of the flank shape for sidewindering half tooth of male screw with leading screw 2：Keep roller screws tooth form interface profile circular arc constant
And only change roller 1 and contact that sidewinder 1 thread of column half tooth thick with leading screw 2, so that it is changed linearly.1 thread of roller, half tooth is repaiied
Shape process is either ground using turning, disc milling cutter milling, need to only be changed the speed of 1 axial feed of cutter or roller, be added
Work goes out 1 thread of roller that half tooth thickness of roller changes linearly.Roller 1 and 3 side thread of nut, half tooth correction of the flank shape：Change roller 1
The speed of axial feed.Roller 1 contacts the correction of the flank shape process of half tooth of side thread with leading screw 2 and roller 1 contacts side screw thread with nut 3
Roller feed direction is different during the correction of the flank shape of half tooth of tooth, and the variation of feed speed is different.
Step 3: during roller screws tooth correction of the flank shape the acceleration and speed of roller or tool feeding determination.
During one contact side thread correction of the flank shape of roller 1, in the screw pitch and thread number and roller of known roller 1
In the case of 1 rotary speed and thread maximum profiling quantity, roller 1 or the acceleration and speed of tool feeding are derived.
When carrying out correction of the flank shape to 1 thread unilateral side of roller：Assuming that the screw pitch of roller is p, n thread is shared, and it is revolved
The angular speed turned is ω, then in the case where known maximum profiling quantity is Δ X, calculates the speed of roller 1 or tool feeding
Degree and acceleration, specific derivation process are as follows：
It is revolved in cycle turnover in each roller, the displacement of tool feeding is arithmetic progression, then cutter is from thread 1 to n
The axial displacement s to pass by total is
The total time t of experienceAlwaysFor
Wherein T is that roller revolves cycle turnover
The average speed of feedingFor
When processing criterion screw thread, axial feed velocity v0For
So process the speed v fed when maximum profiling quantitytFor
Then acceleration a is
The speed v of feeding is
Wherein t is the time used in correction of the flank shape process, meets condition
The beneficial effects of the invention are as follows：This method is in the case of specified load, using finite element analysis software to planet
Roller screw pair carries out contact analysis, and the maximum profiling quantity of roller screws tooth is obtained by analysis result, is designed by maximum profiling quantity
Go out the roller after correction of the flank shape.By to the roller screw and nut progress finite element contact analysis after correction of the flank shape, obtaining in full payload one
In the case of fixed, the roller after correction of the flank shape significantly reduces the load of roller, leading screw and nut load side thread, to reduce
The adhesive wear and contact fatique wear of thread are caused due to overload, and then improve the use of planetary roller screw pair
Service life.
It elaborates with reference to the accompanying drawings and detailed description to the present invention.
Description of the drawings
Fig. 1 is the structural schematic diagram of background technology planetary roller screw pair.
Fig. 2 is the schematic diagram of threaded rollers in background technology planetary roller screw pair.
Fig. 3 is background technology planetary roller screw pair carrying schematic diagram.
Fig. 4 is the method for the present invention roller screws tooth schematic diagram.
Fig. 5 is the planetary roller screw pair carrying schematic diagram after the method for the present invention correction of the flank shape.
Fig. 6 is that the front and back influence carried to thread to roller screw contact of the method for the present invention roller screws tooth correction of the flank shape is bent
Line.
In figure, 1- rollers, 2- leading screws, 3- nuts, 4- ring gears, 5- retainers.
Specific implementation mode
With reference to Fig. 4-6.The correction method of roller screws tooth is as follows in planetary roller screw pair of the present invention：
Step 1: planetary roller screw pair thread Contact.
The contact of planetary roller screw pair thread is analyzed using finite element method, obtains roller 1 and leading screw 2
With each thread load distribution in 3 contact position of nut, the axial displacement of the stress distribution of each contact point and contact point.As a result it sends out
It is existing, load and contact stress all increase drastically or reductions with the increase of thread ordinal number on each thread, and
The order of magnitude of the maximum profiling quantity of 1 thread of roller can be obtained according to thread contact point axial displacement.
Step 2: the correction of the flank shape detailed process of roller screws tooth.
The correction of the flank shape of roller screws tooth particularly may be divided into roller 1 and contact the correction of the flank shape and rolling for sidewindering 1 thread of column, half tooth with leading screw 2
Column 1 contacts the correction of the flank shape for sidewindering 1 thread of column, half tooth with nut 3.
Roller 1 contacts the correction of the flank shape for sidewindering half tooth of male screw with leading screw 2：Keep roller screws tooth form interface profile circular arc constant
And only change roller 1 and contact that sidewinder 1 thread of column half tooth thick with leading screw 2, so that it is changed linearly.1 thread of roller, half tooth is repaiied
Shape process is either ground using turning, disc milling cutter milling, need to only change the speed of 1 axial feed of cutter or roller, i.e.,
1 thread of roller that half tooth thickness of roller changes linearly can be processed.Roller 1 is similar to 3 side thread of nut, half tooth correction of the flank shape
Roller 1 contacts the correction of the flank shape for sidewindering 1 thread of column, half tooth with leading screw 2, that is, changes the speed of 1 axial feed of roller.Roller 1 and leading screw
The correction of the flank shape process and roller 1 of 2 contact half teeth of side thread and roller feed during the correction of the flank shape of contact half tooth of side thread of nut 3
Direction is different, and the variation of certain feed speed also differs.
Step 3: during roller screws tooth correction of the flank shape the acceleration and speed of roller or tool feeding determination.
During one contact side thread correction of the flank shape of roller 1, in the screw pitch and thread number and roller of known roller 1
In the case of 1 rotary speed and thread maximum profiling quantity, roller 1 or the acceleration and speed of tool feeding can be derived
The parameters such as degree.
When carrying out correction of the flank shape to 1 thread unilateral side of roller：Assuming that the screw pitch of roller is p, n thread is shared, and it is revolved
The angular speed turned is ω, then in the case where known maximum profiling quantity is Δ X, can calculate roller 1 or tool feeding
Speed and acceleration, specific derivation process are as follows：
It is revolved in cycle turnover in each roller, the displacement of tool feeding is arithmetic progression, then cutter is from thread 1 to n
The axial displacement s to pass by total is
The total time t of experienceAlwaysFor
Wherein T is that roller revolves cycle turnover
The average speed of feedingFor
When processing criterion screw thread, axial feed velocity v0For
So process the speed v fed when maximum profiling quantitytFor
Then acceleration a is
The speed v of feeding is
Wherein t is the time used in correction of the flank shape process, meets condition
Claims (1)
1. the correction method of roller screws tooth in a kind of planetary roller screw pair, it is characterised in that include the following steps：
Step 1: planetary roller screw pair thread Contact；
The contact of planetary roller screw pair thread is analyzed using finite element method, obtains roller (1) and leading screw (2)
With each thread load distribution in nut (3) contact position, the axial displacement of the stress distribution of each contact point and contact point；According to spiral shell
Line tooth contact point axial displacement can obtain the order of magnitude of the maximum profiling quantity of roller (1) thread；
Step 2: the correction of the flank shape process of roller screws tooth；
The correction of the flank shape of roller screws tooth is divided into roller (1) and contacts the correction of the flank shape for sidewindering half tooth of column (1) thread and roller with leading screw (2)
(1) correction of the flank shape for sidewindering half tooth of column (1) thread is contacted with nut (3)；
Roller (1) contacts the correction of the flank shape for sidewindering half tooth of male screw with leading screw (2)：Keep roller screws tooth form interface profile circular arc constant
And only change roller (1) and contact that sidewinder column (1) thread half tooth thick with leading screw (2), so that it is changed linearly；Roller (1) screw thread
Half tooth correction of the flank shape process of tooth is either ground using turning, disc milling cutter milling, only need to change cutter or roller (1) axial feed
Speed, process roller (1) thread that half tooth thickness of roller changes linearly；Roller (1) and half tooth of nut (3) side thread
Correction of the flank shape：Change the speed of roller (1) axial feed；Correction of the flank shape process and rolling of the roller (1) with leading screw (2) contact half tooth of side thread
Column (1) is different from roller feed direction during the correction of the flank shape of nut (3) contact half tooth of side thread, and the variation of feed speed is not
Together；
Step 3: during roller screws tooth correction of the flank shape the acceleration and speed of roller or tool feeding determination；
During one contact side thread correction of the flank shape of roller (1), in the screw pitch and thread number and roller of known roller (1)
(1) in the case of rotary speed and thread maximum profiling quantity, roller (1) or the acceleration and speed of tool feeding are derived
Degree；
When carrying out correction of the flank shape to roller (1) thread unilateral side：Assuming that the screw pitch of roller is p, n thread is shared, and it is rotated
Angular speed be ω, then in the case where known maximum profiling quantity is Δ X, calculate the speed of roller (1) or tool feeding
Degree and acceleration, specific derivation process are as follows：
Within each roller rotation cycle turnover, the displacement of tool feeding is arithmetic progression, then cutter from thread 1 to n in total
The axial displacement s to pass by is
The total time t of experienceAlwaysFor
Wherein T is that roller revolves cycle turnover
The average speed of feedingFor
When processing criterion screw thread, axial feed velocity v0For
So process the speed v fed when maximum profiling quantitytFor
Then acceleration alpha is
The speed v of feeding is
Wherein t is the time used in correction of the flank shape process, meets condition
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091503.XA CN106552971B (en) | 2016-12-01 | 2016-12-01 | The correction method of roller screws tooth in planetary roller screw pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091503.XA CN106552971B (en) | 2016-12-01 | 2016-12-01 | The correction method of roller screws tooth in planetary roller screw pair |
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| Publication Number | Publication Date |
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| CN106552971A CN106552971A (en) | 2017-04-05 |
| CN106552971B true CN106552971B (en) | 2018-08-21 |
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| CN201611091503.XA Expired - Fee Related CN106552971B (en) | 2016-12-01 | 2016-12-01 | The correction method of roller screws tooth in planetary roller screw pair |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111008493B (en) * | 2019-11-28 | 2022-04-12 | 西北工业大学 | Simulation method for grinding of grinding wheel |
| CN114429004A (en) * | 2021-12-24 | 2022-05-03 | 北京精密机电控制设备研究所 | Optimization design method of curved surface tooth profile planetary roller screw |
| CN114684255B (en) * | 2022-05-31 | 2022-12-02 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Steering device, steering system and automobile |
| CN116989110B (en) * | 2023-09-27 | 2023-12-12 | 江西炬龙精密科技有限公司 | Uniform load planetary roller screw pair |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2775398Y (en) * | 2005-02-02 | 2006-04-26 | 姜源涌 | R-shape slide screw nut |
| JP3139750U (en) * | 2007-12-13 | 2008-02-28 | 那須電機鉄工株式会社 | Manual thread cutting tool |
| CN102366851A (en) * | 2010-11-24 | 2012-03-07 | 山东博特精工股份有限公司 | Mechanically-clamped finishing tool for internal thread of large-sized and heavy-load trapezoid nut |
| CN102182806A (en) * | 2011-04-29 | 2011-09-14 | 黄溧震 | Planetary roller screw |
| CN102829145B (en) * | 2012-09-07 | 2015-04-22 | 西北工业大学 | Planetary roller screw pair capable of being self-locked |
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Granted publication date: 20180821 Termination date: 20191201 |