CN101234441A - Method for processing ring surface worm-gears of hard tooth-surface ring surface worm-gear involute gear pair - Google Patents
Method for processing ring surface worm-gears of hard tooth-surface ring surface worm-gear involute gear pair Download PDFInfo
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- CN101234441A CN101234441A CNA2008101011968A CN200810101196A CN101234441A CN 101234441 A CN101234441 A CN 101234441A CN A2008101011968 A CNA2008101011968 A CN A2008101011968A CN 200810101196 A CN200810101196 A CN 200810101196A CN 101234441 A CN101234441 A CN 101234441A
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- involute
- enveloping worm
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Abstract
The invention discloses a processing method for an enveloping worm of a hard tooth surface enveloping worm involute gear pair, which belongs to a hard tooth surface enveloping worm finish machining method. The technical scheme includes the enveloping worm 1 and axis of rotation 4 of the enveloping worm, an involute helical column gear 2 and an involute gear-shaped honing wheel 3, wherein the honing wheel 3 and the involute helical column gear 2 share an identical geometry parameter and an axis of rotation 5, two axes 4 and 5 fixed and vertically interlaced; a center distance is a, the involute gear-shaped honing wheel 3 is moved for a distance of s relative to the enveloping worm 1 and along the axis of rotation 5 and is rotated around the axis of rotation 5 for Phi dc equal to Phi /i12 plus s/Pd equal to f(Phi, s); the involute gear-shaped honing wheel 3 moves in a freedom of motion relative to the enveloping worm 1. The processing method for the enveloping worm of the hard tooth surface enveloping worm involute gear pair solves a problem of a precise process of the hard tooth surface enveloping worm involute gear pair and provides a new processing method for the hard tooth surface enveloping worm involute gear pair.
Description
Technical field
The present invention relates to a kind of enveloping worm processing method of hard tooth surface enveloping worm involute gear pair, belong to the method for fine finishing of hard flank of tooth enveloping worm.Hard flank of tooth enveloping worm that obtains thus and hard flank of tooth involute helical gears engaged transmission form hard tooth surface enveloping worm involute gear pair.
Technical background
In Worm and Worm Gear Driving in order to obtain contact quality preferably, worm gear pair all needs running-in, and in order to improve wearability and running-in, general hard flank of tooth worm screw and the soft flank of tooth worm gear form worm gear pair of adopting, the material of soft flank of tooth worm gear generally adopts copper, but cost is higher, perhaps adopt cast iron, but bearing capacity is low.If the machining accuracy of worm and worm wheel is very high, the worm gear pair contact quality is fine and help elastohydrodynamic lubrication, adopt the extreme boundary lubrication oil lubrication, just can all make the hard flank of tooth to worm and worm wheel, so, the bearing capacity of worm gear pair and life-span will improve a lot, do not adopt non-ferrous metals such as copper and tin, cost also can reduce significantly.In order to obtain the contact quality of high-precision enveloping worm transmission to ensure, worm gear is replaced with reaching high-precision involute helical gears, obtain enveloping worm involute gear pair.
The enveloping worm flank of tooth of enveloping worm involute gear pair has two kinds of processing methods, a kind of is to form by the double freedom sports envelope with the involute cutter tooth, this method is that Liu Zongfu rolls up proposition in the 5th phase " development of involute helical gear enveloping worm pair " in nineteen ninety-five " machinery " the 22nd, on gear-hobbing machine, mill out this enveloping worm, and this worm gear pair is used for precision indexing.But, this method milling be the tin bronze enveloping worm, the involute helical gear that only matches is the hard flank of tooth, so can only be used for the precision indexing worm-drive, and need match running-in for the enveloping worm that processes and involute gear.
Another kind is with the method for involute teeth wheel shape dressing by the hard flank of tooth enveloping worm of single dof mobility grinding, is to roll up the article " Tooth contact analysis of toroidal involute wormmating with involute helical gear " of the 7th phase in 2002 the 37th by " Mechanism and Machine Theory " to propose.The flank of tooth instantaneous contact line direction of enveloping worm involute gear pair and the angle of its direction of relative movement have the good condition, bearing capacity and the transmission efficiency height that form elastohydrodynamic lubrication near 90 °.But, because the relative velocity of worm screw and involute teeth wheel shape dressing is lower, making that diamond particles comes off easily on the dressing, effect is relatively poor.For fear of this phenomenon, the method of disk wheel grinding worm is proposed to adopt in the article " method of Precise Grinding envelope TI worm screw " of " Chinese science E collects " 2005 the 35th the 7th phases of volume, emery wheel also has two orthogonal motions except that having the grinding main motion: rotary feed campaign and vertical feed campaign.Grinding wheel spindle cross section profile is not an involute, and emery wheel itself makes trouble like this, and the machine tool motion complexity, and production efficiency is low, is difficult to obtain process application thereby increase manufacturing cost.
The enveloping worm involute gear pair contact conditions is fine, involute helical gears as worm gear can reach very high accuracy, if can solve the worm screw Precision Machining problem of enveloping worm involute gear pair, be equipped with the extreme boundary lubrication oil lubrication so again, just enveloping worm involute gear pair can be made hard flank of tooth transmission.But, the present method that does not find a kind of hard flank of tooth worm screw of accurate processing enveloping worm involute gear pair as yet.
Summary of the invention
The objective of the invention is to provide a kind of worm processing method of hard tooth surface enveloping worm involute gear pair, is the method for fine finishing of hard flank of tooth enveloping worm.Roughing is to adopt the involute cutter tooth to process the helicoid of enveloping worm and leave the honing surplus by the double freedom motion, after heat treatment, double freedom motion honing enveloping worm by the relative worm screw of involute teeth wheel shape honing wheel, enveloping worm that obtains and involute helical gears engaged transmission form hard tooth surface enveloping worm involute gear pair.
Comprise enveloping worm 1 and axis of rotation 4, involute helical gears 2 and have the involute teeth wheel shape honing wheel 3 of identical geometric parameter and same axis of rotation 5 in order to reach the technical scheme that purpose of the present invention takes with it, two axial lines 4,5 fixing and vertical interlaceds, centre-to-centre spacing O
1O
2Equal the centre-to-centre spacing a of enveloping worm 1 and involute helical gears 2 engaged transmission, involute teeth wheel shape honing wheel 3 moves s and rotates around axis 5 along axis 5 with respect to enveloping worm 1
Dc, corner
DcSynthetic by two parts, a part is the gearratio i by enveloping worm 1 corner and involute helical gears 2 engaged transmission
12Corner /the i that obtains
12, another part is the additional rotation angle s/p that is caused by its axial displacement s
d, p
dFor involute teeth wheel shape honing wheel 3 is the helix parameter of involute helical gears 2,
Dc=/i
12+ s/p
d=f (, s), and s are two independently kinematic parameters, s is the positive and negative interval value in the certain limit near zero point, involute teeth wheel shape honing wheel 3 relative enveloping worms 1 are made double freedom motion honing enveloping worm 1, form the worm processing method (as Fig. 1) of hard tooth surface enveloping worm involute gear pair, this processing method can be implemented on general hobbing machine.
In the enveloping worm processing method of above-mentioned hard tooth surface enveloping worm involute gear pair, involute teeth wheel shape honing wheel 3 can be once unidirectional along moving of axis 5, can realize on general gear-hobbing machine, also can be back and forth, needs to improve lathe and just can obtain.
In the enveloping worm processing method of above-mentioned hard tooth surface enveloping worm involute gear pair, it can be master gear that involute helical gears 2 reach with its involute teeth wheel shape honing wheel 3 with identical geometric parameter, also can be profile modified gear.
In the enveloping worm processing method of above-mentioned hard tooth surface enveloping worm involute gear pair, involute helical gears 2 reach and can be all involute with its involute teeth wheel shape honing wheel 3 tooth curves with identical geometric parameter, also can be all circular arc or other curve, so that form hard flank of tooth enveloping worm circular-arc gear pair or hard other curved tooth cylindrical gear pair of flank of tooth enveloping worm.
The present invention proposes a kind of enveloping worm honing method of hard tooth surface enveloping worm involute gear pair, thereby solved the Precision Machining problem of hard tooth surface enveloping worm involute gear pair, for the manufacturing of hard tooth surface enveloping worm involute gear pair provides a kind of new processing method.
Description of drawings
Fig. 1 is the worm processing method schematic diagram of hard tooth surface enveloping worm involute gear pair.
Specific embodiments
With reference to the accompanying drawings embodiments of the invention are described below.
The enveloping worm processing method of hard tooth surface enveloping worm involute gear pair can be implemented on general hobbing machine.The design hard tooth surface enveloping worm involute gear pair is the standard hard tooth surface enveloping worm involute gear pair, and enveloping worm 1 and involute helical gears 2 are all left-handed, and involute helical gears 2 are standard involute gear, and they have identical modulus m
nWith pressure angle α
n, the number of teeth of involute helical gears 2, reference diameter and spiral angle of graduated circle are respectively z
2, d
2And β
2, a number of enveloping worm 1 is z
1, gearratio i
12=z
2/ z
1, centre-to-centre spacing a, involute helical gears 2 helix parameter p
d=d
2/ (2tan β
2).
The material of enveloping worm 1 is elected 38CrMoAl as, through conventional technological process, the involute cutter tooth (as pinion cutter) that 2 selections have same parameter according to the involute helical gears, on gear-hobbing machine, press double freedom motion roughing enveloping worm 1, and reserve the honing surplus, then enveloping worm 1 nitriding is handled.The making of honing wheel: process matrix wheel with identical geometric parameter and the thickness that the tooth attenuate is reserved abrasive material according to involute helical gears 2, silicon carbide abrasive, epoxy resin adhesive are mixed with curing agent, plasticizer, and it is uniform on the matrix wheel, behind timeliness and the high warm hardening, process involute teeth wheel shape honing wheel 3 by involute helical gears 2, and guarantee that abrasive material evenly covers on the honing wheel flank of tooth with identical geometric parameter.So far adopt known technology to finish the roughing of enveloping worm 1 and the preparation work of involute teeth wheel shape honing wheel 3.
To the fine finishining of enveloping worm 1, adopt honing method of the present invention.As shown in Figure 1, will be contained in (Fig. 1 worm axis 4 positions) on the hob head through roughing and heat treated enveloping worm 1,1/2nd places that make tooth minister degree are by gear hobbing machine worktable center and fastening; Involute teeth wheel shape honing wheel 3 is contained on the gear hobbing machine worktable, the axis 4 of enveloping worm 1 and axis 5 vertical interlaceds of involute teeth wheel shape honing wheel 3, get s=0, there is the honing amount that equates the both sides of adjusting involute teeth wheel shape honing wheel 3 teeth with enveloping worm 1, then involute teeth wheel shape honing wheel 3 are fastened on the workbench.Hob head reduced to make enveloping worm 1 be lower than involute teeth wheel shape honing wheel 3, adjust workbench and make centre-to-centre spacing O
1O
2=a is as the initial manufacture position of involute teeth wheel shape honing wheel 3 honing enveloping worms 1.Rotate the corner that obtains enveloping worm 1 by hob head, hob head moves along column (paralleling to the axis 5), be equivalent to involute teeth wheel shape honing wheel 3 opposite, the identical moving displacement s of displacement of direction with it, press the gearratio i of enveloping worm 1 and involute helical gears 2 with respect to enveloping worm 1
12Calculate ratio change gear and obtain
d=/i
12, get additional rotation angle Δ =s/p by the differential gear of gear-hobbing machine
d, the corner of both synthetic work platforms (being involute teeth wheel shape honing wheel 3)
Dc=
d+ Δ .Cost vertical feed and differential hanging gear, start lathe, hob head is progressively axially promoted along workbench, till involute teeth wheel shape honing wheel 3 leaves enveloping worm 1, go out institute's geared surface of enveloping worm 1 like this with regard to honing.The relative enveloping worms 1 of involute teeth wheel shape honing wheel 3 produce and s is two independently motions in the process, s by on the occasion of through zero point to negative value variation, the double freedom motion honing enveloping worm of the relative enveloping worm of involute teeth wheel shape honing wheel.
The material of involute helical gears 2 is elected 40Cr as, after heat treatment, roll flute can obtain precision and reach hard flank of tooth enveloping worm 1 engaged transmission that the hard flank of tooth involute helical gears 2 more than 6 grades become with honing, it is lubricated to be equipped with extreme pressure lublicating oil (hypoid oil) again, constitutes hard tooth surface enveloping worm involute gear pair.
Claims (4)
1, the worm processing method of hard tooth surface enveloping worm involute gear pair comprises enveloping worm 1 and axis of rotation 4, involute helical gears 2 and has the involute teeth wheel shape honing wheel 3 of identical geometric parameter and same axis of rotation 5 with it, two axial lines 4,5 fixing and vertical interlaceds, centre-to-centre spacing O
1O
2Equal the centre-to-centre spacing a of enveloping worm 1 and involute helical gears 2 engaged transmission, involute teeth wheel shape honing wheel 3 rotates corner with respect to enveloping worm 1 along axis 5 moving displacement s and around axis 5
Dc=/i
12+ s/p
d=f (, s), the corner of enveloping worm 1 and s are two independently kinematic parameters, involute teeth wheel shape honing wheel 3 relative enveloping worms 1 are made double freedom motion honing enveloping worm 1.
2, the worm processing method of hard tooth surface enveloping worm involute gear pair according to claim 1, it is characterized in that, involute teeth wheel shape honing wheel 3 can be once unidirectional along moving of axis 5, on general gear-hobbing machine, can realize, also can be back and forth, need to improve lathe and just can obtain.
3, the worm processing method of hard tooth surface enveloping worm involute gear pair according to claim 1, it is characterized in that, it can be master gear that involute helical gears 2 reach with its involute teeth wheel shape honing wheel 3 with identical geometric parameter, also can be profile modified gear.
4, the worm processing method of hard tooth surface enveloping worm involute gear pair according to claim 1, it is characterized in that, involute helical gears 2 reach and can be all involute with its involute teeth wheel shape honing wheel 3 tooth curves with identical geometric parameter, also can be all circular arc or other curve, so that form hard flank of tooth enveloping worm circular-arc gear pair or hard other curved tooth cylindrical gear pair of flank of tooth enveloping worm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101011968A CN100534686C (en) | 2008-02-29 | 2008-02-29 | Method for processing ring surface worm-gears of hard tooth-surface ring surface worm-gear involute gear pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101011968A CN100534686C (en) | 2008-02-29 | 2008-02-29 | Method for processing ring surface worm-gears of hard tooth-surface ring surface worm-gear involute gear pair |
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| Publication Number | Publication Date |
|---|---|
| CN101234441A true CN101234441A (en) | 2008-08-06 |
| CN100534686C CN100534686C (en) | 2009-09-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878446A (en) * | 2013-01-23 | 2014-06-25 | 洛阳凯环精密机械有限公司 | Enveloping worm minimum-center-distance milling method |
| CN106112379A (en) * | 2016-07-22 | 2016-11-16 | 东北大学 | The variable element of a kind of hindley worm pair is combined correction method |
| CN110508879A (en) * | 2019-08-12 | 2019-11-29 | 扬州大学 | A kind of the numerical control turning overlap and chamfering method of toroid enveloping worm with involute helicoid generatrix |
| CN114505543A (en) * | 2022-02-25 | 2022-05-17 | 重庆大学 | Involute surface enveloping ring surface worm tooth surface hobbing cutter confirming method based on medium gear |
-
2008
- 2008-02-29 CN CNB2008101011968A patent/CN100534686C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878446A (en) * | 2013-01-23 | 2014-06-25 | 洛阳凯环精密机械有限公司 | Enveloping worm minimum-center-distance milling method |
| CN103878446B (en) * | 2013-01-23 | 2016-03-02 | 洛阳凯环精密机械有限公司 | The little centre-to-centre spacing grinding processing method of enveloping worm |
| CN106112379A (en) * | 2016-07-22 | 2016-11-16 | 东北大学 | The variable element of a kind of hindley worm pair is combined correction method |
| CN110508879A (en) * | 2019-08-12 | 2019-11-29 | 扬州大学 | A kind of the numerical control turning overlap and chamfering method of toroid enveloping worm with involute helicoid generatrix |
| CN110508879B (en) * | 2019-08-12 | 2020-07-07 | 扬州大学 | Numerical control turning flash and chamfering method for involute surface enveloping ring surface worm |
| CN114505543A (en) * | 2022-02-25 | 2022-05-17 | 重庆大学 | Involute surface enveloping ring surface worm tooth surface hobbing cutter confirming method based on medium gear |
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| Publication number | Publication date |
|---|---|
| CN100534686C (en) | 2009-09-02 |
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Granted publication date: 20090902 Termination date: 20170229 |