CN104308277B - A kind of hobbing method for processing - Google Patents
A kind of hobbing method for processing Download PDFInfo
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- CN104308277B CN104308277B CN201410561508.9A CN201410561508A CN104308277B CN 104308277 B CN104308277 B CN 104308277B CN 201410561508 A CN201410561508 A CN 201410561508A CN 104308277 B CN104308277 B CN 104308277B
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Abstract
The invention discloses a kind of hobbing method for processing, including：Step 1) determine that the processing facewidth is B, roughing tooth reference circle chordal tooth thickness is s1, and reference circle chordal tooth thickness is S, and the feed of gear radial direction is Δ h=Δ s/2tan α, wherein：Δ h fine cuts feed radial direction cutting-in (mm)；α profile angles；Δ s=s1 S；Step 2) determine time t, t is that X-axis is entered time delay of 0.01mm every time, the t=h × number of teeth × (workpiece each revolution of time)/(Z axis feed) wherein, B/0.64=h/0.01, h is the dropping distance of Z axis when X-axis changes 0.01mm；Step 3) lathe enters 0.01mm, time delay t every time with X-axis, the synchronization action that the radial feed and Z axis of gear decline is realized, so as to realize the asymmetric correction of the flank shape of gear teeth directional.
Description
Technical field
The present invention relates to gear machining technology field, more particularly to a kind of hobbing method for processing.
Background technology
Currently for high accuracy and the high-power electric locomotive and urban track traffic skiving wheel of high intensity requirement, to ensure
Its robust motion and good contact strength, driving gear teeth directional are processed using symmetrical correction of the flank shape, and this conventional gear hobbing adds
Work method cannot realize the asymmetric correction of the flank shape of teeth directional, and the case depth along the whole flank of tooth of teeth directional will be caused uneven, in transmission
During the uneven phenomenon of abrasion occurs, gear performance and life-span are produced and are had a strong impact on, increased roll flute processing remaining
Amount and process time, in roll flute, because unilateral profiling quantity is excessive, grinding boss can be produced, and this is exhausted in Gear Processing
To what is do not allowed.
Therefore, how a kind of hobbing method for processing is provided, is current this area skill to realize the asymmetric correction of the flank shape of gear teeth directional
Art personnel technical problem urgently to be resolved hurrily.
The content of the invention
In view of this, it is an object of the invention to provide a kind of hobbing method for processing, repaiied with realizing that gear teeth directional is asymmetric
Shape.
In order to achieve the above object, the present invention provides following technical scheme：
A kind of hobbing method for processing, including：Step 1) determine that the processing facewidth is B, roughing tooth reference circle chordal tooth thickness is s1, point
Degree circle chordal tooth thickness is S, and the feed of gear radial direction is Δ h=Δs s/ (2tan α), wherein：Δ h- fine cut feed radial direction cutting-ins
(mm)；α-profile angle；Δ s=s1-S；Step 2) determine time t, t is the time delay that X-axis enters 0.01mm every time, t=h × tooth
Number × (workpiece each revolution of time)/(Z axis feed), wherein, B/0.64=h/0.01, h are the Z axis when X-axis changes 0.01mm
Dropping distance；Step 4) lathe enters 0.01mm, time delay t every time with X-axis, realizes that the radial feed and Z axis of gear decline
Synchronization action, roughing tooth reference circle chordal tooth thickness s1 refers to the chord length thickness of teeth portion of the gear on reference circle in the middle part of the facewidth, is
Gear slightly cut after thickness, and reference circle chordal tooth thickness S is the reference circle transverse tooth thickness chord length for leaving allowance, and X-axis is machining direction,
That is facewidth direction, gear is radially the diametric(al) of gear, that is, the direction of feed processed.
Preferably, said gear is left-handed or dextrorotation.
The hobbing method for processing that the present invention is provided, including：Step 1) determine that the processing facewidth is B, roughing tooth reference circle string tooth
Thickness is s1, and reference circle chordal tooth thickness is S, and the feed of gear radial direction is Δ h=Δs s/ (2tan α), wherein：Δ h- fine cut feeds
Radial direction cutting-in (mm)；α-profile angle；Δ s=s1-S；Step 2) determine time t, t is the time delay that X-axis enters 0.01mm every time,
T=h × the number of teeth × (workpiece each revolution of time)/(Z axis feed), wherein, B/0.64=h/0.01, h are to be changed in X-axis
During 0.01mm, the dropping distance of Z axis；Step 3) lathe enters 0.01mm, time delay t every time with X-axis, realizes that the radial direction of gear is entered
The synchronization action that knife and Z axis decline, so as to realize the asymmetric correction of the flank shape of gear teeth directional.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the product for processing of the asymmetric correction of the flank shape hobbing method for processing of gear teeth directional provided in an embodiment of the present invention
Structural representation.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is refer to, Fig. 1 is the processing of the asymmetric correction of the flank shape hobbing method for processing of gear teeth directional provided in an embodiment of the present invention
The structural representation of product out, △ A1=△ A2 in Fig. 1.
Hobbing method for processing provided in an embodiment of the present invention, gear is left-handed or dextrorotation, including：Step 1) determine processing
The facewidth is B, and roughing tooth reference circle chordal tooth thickness is s1, and reference circle chordal tooth thickness is S, and the feed of gear radial direction is Δ h=Δs s/
(2tan α), wherein：Δ h- fine cuts feed radial direction cutting-in (mm)；α-profile angle；Δ s=s1-S；Step 2) determine time t, t is X
Axle enters the time delay of 0.01mm every time, the t=h × number of teeth × (workpiece each revolution of time)/(Z axis feed), wherein, B/0.64
=h/0.01, h are the dropping distance of Z axis when X-axis changes 0.01mm；Step 3) lathe enters 0.01mm every time with X-axis, postpones
Time t, realizes the synchronization action that the radial feed and Z axis of gear decline, so as to realize the asymmetric correction of the flank shape of gear teeth directional.
Because in the prior art, wanting to realize that the asymmetric chamfered edge of teeth directional of driving gear is rolled on chain digital control gear hobbing machine
Tooth is processed, it is necessary to two problems of solution：
First problem is that the gear hobbing process of the product needs knife rest (gear hobbing uses inverse rolling) during vertical decline,
The radial direction of gear will positive feed simultaneously.
Second Problem be gear during radial feed, the action of the knife rest Z axis and X-axis of gear-hobbing machine is synchronous.
Solution includes at 2 points, is respectively：
1st, using the working ability of existing device, with reference to interpolation principle, procedure is regrouped, while adjusting main shaft
After rotating speed and feeding speed, by the minimum movement feedback unit convergence of X-axis, the synchronization action of Z axis and X-axis is realized.
2nd, the minimum that the servomotor that the time needed for declining a segment distance by using Z axis carrys out synchronous X-axis is fed back is single
Position distance, solves the synchronization action that the radial feed and Z axis of gear decline.
Because chain digital control gear hobbing machine only X-axis is by step motor control, then the program worked out also can only
Enough control the action of X.And Z axis are that, by mechanically operated, as long as then equipment one starts, Z axis will be moved with main shaft,
Therefore the program worked out will make the motion of Z axis and X-axis produce contact.In order that X-axis produces linkage with Z axis, using convergence method,
After Z axis move one section of preset distance, X-axis is set to change distance accordingly by programme-control, so could be in whole facewidth direction
Ensure the even variation of the flank of tooth and tooth root as far as possible, it is unlikely to occur obvious projection on the flank of tooth and tooth root of workpiece.Simultaneously
Also to ensure Z axis within this section of preset distance for declining, keep X-axis motionless, then constantly circulation X-axis is moved with the linkage of Z axis
Make, untill the variation that X-direction generates requirement.
But want the feed motion for making the feeding in X-direction be changed into intermittent, i.e., to make X-axis a certain amount of in every movement
Distance after produce one section of time delay specified, while ensure X-axis within set specified time delay, corresponding Z axis
Decline one section of fixed preset distance.
Due to gear hobbing chamfered edge to be realized, the chordal tooth thickness in teeth directional direction forms poor up and down, then when gear is processed, be in footpath
It is Δ h=Δs s/ (2tan α) to the feed in direction.
Wherein：Δ h--- fine cuts feed radial direction cutting-in (mm)；α ----profile angle；Δ s=s1-S, wherein s1 are roughing tooths
Reference circle chordal tooth thickness；S is drawing requirement reference circle chordal tooth thickness.
Driving gear gear hobbing parameter is adjusted to as shown in table 1：
According to the driving gear gear hobbing process facewidthIt is determined that making its facewidth existIn the range of X-axis
Value changes are uniform, by calculating：
174.5/0.64=(when X-axis changes 0.01, dropping distance h)/0.01 of Z axis
H=2.736875mm being drawn, Z axis should being made when have dropped the fixed range of h=2.736875mm, X-axis is corresponding
Variation 0.01mm.
X-axis enters the calculating of the time delay t of 0.01mm every time：T=h × the number of teeth × (workpiece is each revolution of
Time)/(Z axis feed).
Gear hobbing theory adjusting parameter is shown in Tables 1 and 2：
Table 1
Table 2
The following is X-axis and the subprogram of the coordinated operation of Z axis：
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (2)
1. a kind of hobbing method for processing, it is characterised in that including：
Step 1) determine that the processing facewidth is B, roughing tooth reference circle chordal tooth thickness is s1, and reference circle chordal tooth thickness is S,
The feed of gear radial direction is Δ h=Δs s/ (2tan α),
Wherein：Δ h- fine cuts feed radial direction cutting-in (mm)；
α-profile angle；
Δ s=s1-S；
Step 2) determine time t, t enters the time delay of 0.01mm every time for X-axis, the t=h × number of teeth × (when workpiece is each revolution of
Between)/(Z axis feed), wherein, B/0.64=h/0.01, h are the dropping distance of Z axis when X-axis changes 0.01mm；
Step 3) lathe enters 0.01mm, time delay t every time with X-axis, realizes that the synchronization that the radial feed and Z axis of gear decline is moved
Make,
Roughing tooth reference circle chordal tooth thickness s1 refers to the chord length thickness of teeth portion of the gear on reference circle in the middle part of the facewidth, is that gear is slightly cut
Thickness afterwards, reference circle chordal tooth thickness S refers to chord length of the gear on the reference circle on gear teeth front end face,
X-axis is machining direction, i.e. facewidth direction, and gear is radially the diametric(al) of gear, that is, the direction of feed processed,
Z axis refer to the diametric(al) of gear, are also the direction of feed in process, or referred to as tooth direction high.
2. hobbing method for processing according to claim 1, it is characterised in that the gear is left-handed or dextrorotation.
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| CN201410561508.9A CN104308277B (en) | 2014-10-21 | 2014-10-21 | A kind of hobbing method for processing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410561508.9A CN104308277B (en) | 2014-10-21 | 2014-10-21 | A kind of hobbing method for processing |
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| CN104308277A CN104308277A (en) | 2015-01-28 |
| CN104308277B true CN104308277B (en) | 2017-06-16 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5298296A (en) * | 1976-02-13 | 1977-08-17 | Toyota Motor Corp | Method of manufacturing tools used in producing gears by rolling |
| CN101244474B (en) * | 2008-03-25 | 2012-03-21 | 东华大学 | Numerical control gear hobbing method for processing helical teeth elliptic gear and helical teeth non-circular gear |
| JP5573684B2 (en) * | 2011-01-04 | 2014-08-20 | 三菱マテリアル株式会社 | Helical brooch |
| DE102012015846A1 (en) * | 2012-04-17 | 2013-10-17 | Liebherr-Verzahntechnik Gmbh | Method and device for hard finishing of modified gears |
| CN102728901A (en) * | 2012-06-05 | 2012-10-17 | 株洲市星源科技发展有限公司 | Drum profile-modifying gear improvement process |
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