CN105921823B - A kind of numerical control worm wheel grinding method of cycloid gear - Google Patents
A kind of numerical control worm wheel grinding method of cycloid gear Download PDFInfo
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- CN105921823B CN105921823B CN201610423437.5A CN201610423437A CN105921823B CN 105921823 B CN105921823 B CN 105921823B CN 201610423437 A CN201610423437 A CN 201610423437A CN 105921823 B CN105921823 B CN 105921823B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/02—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding
- B23F5/04—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding the tool being a grinding worm
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Abstract
The present invention relates to a kind of numerical control worm wheel grinding methods of cycloid gear, and the worm abrasion wheel three-dimensional profile formula of machining cycloidal gears is derived according to cycloid gear three-dimensional profile formula using space meshing principle, and cycloid gear is refined using worm abrasion wheel.This method has apparent advantage compared to cycloid gear plunge grinding technology, substitutes discontinuously processing with Continuous maching, simultaneously, generating motion precision stability is higher than interrupted dividing movement precision, increasing substantially for precision of grinding teeth, the significant decrease of roll flute production cost, roll flute efficiency is caused to obviously increase.On the lathe of worm wheel grinding cycloid gear, in this way, and the special fixture platform of associated workpiece should be designed, two cycloid gear gear blanks of disposable location and installation, and determine their spatial position；Worm abrasion wheel side increases online gauge head, positions the spatial position of worm abrasion wheel；The R. concomitans of two above technology, realize cycloid gear gear blank and worm abrasion wheel quick and precisely to knife.
Description
Technical field
The invention belongs to the gear grindings under mechanical manufacturing field, especially cycloid gear generating grinding manufacture field, relate to
And a kind of numerical control worm wheel grinding method of cycloid gear.
Background technology
With the development of industrial technology, the application of cycloid gear is more and more, cycloid gear speed reducer have reduction ratio it is big,
The advantages that compact-sized, is widely used under the behaviour in service for having space to limit；Transmission of the cycloid gear in modern machines people
There is important application in mechanism, with the development of robot industry, the quality and quantity of cycloid gear is also required to further carry
It is high；Cycloid gear is also being continuously improved in the application requirement of traditional clock and watch, military affairs etc., these require cycloid gear simultaneously
Progress is continuously improved in terms of the efficiency of finishing and accuracy class.
The plunge grinding technology of cycloid gear develops comparative maturity, and production efficiency cannot be guaranteed, although proposing modification
The solution that cutter and multiple teeth are processed simultaneously, but effect is unsatisfactory；Meanwhile plunge grinding is to lathe itself precision etc.
Grade (mainly include location and installation, to knife precision and indexing accuracy) it is more demanding, this equally limits cycloid gear forming
The development of grinding.
When cycloidal gear grinding machine is using simulation cycloid gear speed reducer work, the movement relation of gear and pinwheel is realized
The grinding of cycloid gear, although the method realizes transforms into continuous grinding, but processing efficiency is still relatively low.
The cycloid worm wheel grinding technology just etc. studied when Xu Youfu, king, what is utilized is cycloid gear and cycloid tooth
The theory of engagement of item, is derived from conclusion, as long as in the case of ensureing that rolling circle radius and eccentricity are identical, cycloid rack can be with
It is engaged with arbitrary cycloid gear；Above method is equal to the three-dimensional that machining worm is established using the Normal profile of theoretical worm screw
Profile is ensureing that worm abrasion wheel outer diameter is indeclinable, and this method is correct；But worm abrasion wheel is with processing
The progress of process, outer diameter can be tapered into the progress of grinding, if correcting worm screw profile not in time, grinding accuracy will
Significantly reduce；Therefore, this method unsuitable worm abrasion wheel that carries out in the case where required precision is very high is continuously ground for a long time
It cuts.
With the development of Numeric Control Technology and the raising of worm abrasion wheel dressing technique, make to process cycloid using worm abrasion wheel
The method of gear is achieved, and promotes the development of cycloid gear grinding technique.
Invention content
In view of the above-mentioned deficiencies in the prior art, the present invention provides a kind of numerical control worm grinding wheel of cycloid gear mills
Cutting method, the application space theory of engagement go out worm abrasion wheel three-dimensional profile formula according to the cycloid gear three-dimensional profile derivation of equation, and
With cycloid gear gear blank in design position positioning, installation, to knife and progress Grinding Process.Technique mistake is realized on lathe
Journey improves the production efficiency and machining accuracy of cycloid gear grinding in this way.
In order to solve the above-mentioned technical problem, present invention employs following technical solutions：
A kind of numerical control worm wheel grinding method of cycloid gear, uses on worm wheel grinding cycloid gear lathe,
The three-dimensional profile formula that corresponding worm abrasion wheel is calculated according to cycloid gear three-dimensional profile formula is modified according to three-dimensional profile formula
Worm abrasion wheel, the worm abrasion wheel machining cycloidal gears gear blank completed using finishing；The primary property location and installation two on clamping fixture table
Cycloid gear gear blank determines workpiece space position；According to worm abrasion wheel cental axial position and corner and online probe location, really
Determine the spatial position of worm abrasion wheel；Utilize the meshing relation and spatial position of worm abrasion wheel and cycloid gear, numerical programming program
It carries out to knife and grinding.In order to achieve the above functions, grinding machine tool agent structure is designed：Lathe base, worm abrasion wheel master
Axis, worm abrasion wheel translation guide rail, work piece holder platform, online gauge head, emery wheel and other relevant accessory devices.
As a preferred embodiment of the present invention, worm abrasion wheel profile formula computational methods are：Three according to cycloid gear
Profile is tieed up, the spatial position coordinate system relationship of worm abrasion wheel and cycloid gear is established, according to the gear motion relationship of the two, is calculated
Go out the contact line in engagement process, contact line carries out helical scanning movement, obtains worm abrasion wheel three-dimensional form equation formula；Worm screw
Grinding wheel profile formula is as follows：
Contact line equations：
Additional spiral post exercise worm abrasion wheel three-dimensional profile：
Xdm=Xdcosθ-Ydsinθ
Ydm=Xdsinθ+Ydcosθ
Wherein, zgIt is the cycloid gear number of teeth,It is cycloid gear corner, λ is worm abrasion wheel setting angle, and K is centre-to-centre spacing, θ
It is worm abrasion wheel helical angle, T is the pitch of worm abrasion wheel；Finally, the profile formula of cycloid gear X and Y are brought into calculating
Obtain the three-dimensional profile formula of worm abrasion wheel.
As another preferred embodiment of the present invention, two cycloid gear gear blanks of disposable location and installation on clamping fixture table, folder
Have the localization method that platform uses plane and two pits, the tooth socket that the straight line where straight pin and chamfered edge pin passes through cycloid gear gear blank
With tooth top (the cycloid gear number of teeth is generally odd number in RV retarders), two chamfered edge pins are set herein to limit gear blank respectively along circle
The rotational freedom of pin reaches in the case of meeting accuracy class requirement, two workpiece gear blanks of disposable location and installation, and
Determine space tooth socket and the tooth top position of gear blank.
As another preferred embodiment of the present invention, two chamfered edge pins limit gear blank along the rotatably mounted of straight pin respectively
It spends, the fabrication hole and position of positioning hole processed in the gear blank of cycloid gear overlap, and differ in size, two gear blank location holes difference
180°；The chamfered edge pin of limitation top gear blank degree of freedom is allowed to position top gear blank across the fabrication hole of the gear blank of lower part, limitation turns
The fabrication hole of dynamic degree of freedom, lower part gear blank passes through this chamfered edge pin, this chamfered edge pin not to have any impact to lower part gear blank；Meanwhile
The top flank flat of lower part gear blank is the location and installation face of top gear blank.
Scheme as an improvement of the present invention, on worm abrasion wheel central shaft, the side of worm abrasion wheel devises online
Gauge head is assured that the spatial position of worm abrasion wheel three-dimensional profile, the gear blank space bit determined in the 3rd step of combined method in this way
It sets, using the meshing relation of the two, numerical programming program is carried out to knife and grinding.
As another improvement project of the present invention grinding machine tool main body is designed in order to realize this method for grinding
Structure has：Lathe base, worm abrasion wheel main shaft, worm abrasion wheel translation guide rail, work piece holder platform, online gauge head and emery wheel；
Based on lathe base, worm abrasion wheel main shaft is mounted on lathe translation guide rail, and X, Y, the side Z are established centered on worm abrasion wheel
To coordinate system, worm abrasion wheel main shaft along Y direction formed certain angle installation, certain angle is worm abrasion wheel spiral
Angle, A axis realize worm abrasion wheel axis in the rotating function of YZ planes, and B axle is grinding wheel spindle, realize the high speed rotation of worm abrasion wheel
Turn, online gauge head is mounted on worm abrasion wheel spindle nose, realizes that On-machine Test function, C axis are overlapped with Z-direction, realizes workpiece
The rotation of gear blank, Y-axis are diamond roller main shaft, realize that the high speed rotation of emery wheel, emery wheel can follow clamp system
Realize a certain range of movement of Z-direction.These machine tool structures realize the function in above-mentioned steps, in conjunction with worm abrasion wheel three-dimensional
Profile formula completes the numerical control grinding of worm abrasion wheel fine grinding cycloid gear, adds the restoring on line grinding wheel function of emery wheel,
And the other and relevant machine tool auxiliary device of gear grinding machines, the final grinding cycloid gear for realizing precise and high efficiency.
The beneficial effects of the invention are as follows：The high-precision of cycloid gear, high-efficiency grinding may be implemented in such method, with transforming into
Continuous grinding is ground instead of indexing, and the plunge grinding method of current mainstream can be replaced in engineer application；Based on cycloid tooth
The worm wheel grinding method of wheel, the correction method based on correction of the flank shape profile inverse worm abrasion wheel profile can also be gone with being suggested
In addition to this process of cycloid gear correction of the flank shape, processing efficiency is substantially increased；Its On-machine Test function solves product examination well
The problem of detection, assembly during system constantly repeat, improves trial-production efficiency；Increased on lathe worm abrasion wheel in machine
Repair module facilitates the accurate quick finishing of worm abrasion wheel, reduces grinding non-cutting time, improves processing efficiency, meanwhile, no
With worm abrasion wheel is reinstalled, machining accuracy and stability are also ensured.
Description of the drawings
Fig. 1 is the generating principle figure of cycloid gear and its equal space line；
Fig. 2 is cycloid gear and the worm abrasion wheel spatial conjugate location drawing；
Fig. 3 is cycloid gear and worm abrasion wheel engaged transmission relation figure；
Fig. 4 is that worm abrasion wheel helical tooth flank forms figure；
Fig. 5 is worm abrasion wheel normal section；
Fig. 6 is lathe schematic diagram；
Fig. 7 is clamping fixture table structure chart；
Fig. 8 is that worm abrasion wheel and cycloid gear engage figure.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
By taking worm wheel grinding standard involute helical gear as an example, a kind of numerical control worm wheel grinding side of cycloid gear
Method includes the following steps：
As shown in Figure 1, the parameter in figure is respectively：
RZFor pinwheel radius；
K1For the curtate ratio of cycloid；
ZbFor the pinwheel number of teeth；
ZaFor the cycloid gear number of teeth；
ψ is (no packet the forms method) corners of r relative to R；
x0、y0For cycloid gear tooth profile equation；
X, y is cycloidal equidistance curve form equation.
By cycloid forming process, it can show that the tooth profile equation of cycloid gear is as follows with geometrical relationship：
If the radius of pin gear sleeve is rZ, the common normal of flank profil arbitrary point and the angle of X-axis of cycloid are γ, then cycloid gear
The equation of flank profil equal space line is as follows：
X=xo+rZcosγ
Y=yo-rZ sinγ
In formula：
The three-dimensional profile of cycloid worm abrasion wheel, the i.e. helical tooth flank of cycloid worm abrasion wheel.With its normal tooth profile or axis
To its meshing characteristic of tooth profile analysis, therefore, it is necessary to first solve its helical tooth flank equation.Establish cycloid gear and worm abrasion wheel
Spatial conjugate relationship, Fig. 2 are the position of engagement relationship of cycloid gear and worm abrasion wheel, and Fig. 3 is that cycloid gear is nibbled with worm abrasion wheel
Close drive connection.According to as shown in the figure, odzdIt is the rotation axis of worm abrasion wheel, ogz0It is the rotation axis of workpiece, worm abrasion wheel
Helix angle on pitch cylinder is λ.The transmission ratio of worm abrasion wheel and cycloid gear is：
In formula：zg--- the workpiece number of teeth (i.e. the number of teeth of cycloid gear),
The head number of z --- worm abrasion wheel,
--- the angle of workpiece revolution,
--- workpiece turns overAfterwards, the angle that worm abrasion wheel is turned over.
The pitch radius R of worm abrasion wheeldjAnd the calculating of helical pitch T is as follows：
Wherein, RgjIt is workpiece pitch radius, this parameter is determined by designer.
The minimum distance of worm abrasion wheel axis and axis of workpiece is：
K=Rgj+Rdj
The establishment of coordinate system relationship of cycloid gear and worm abrasion wheel is as follows：
Og(XYZ) it is the moving coordinate system connected firmly with cycloid gear.
Og(X0Y0Z0) it is the reference frame for determining cycloid gear spatial position, it is fixed on space, OgZ0Axis and OgZ axis
Random time all overlaps.
Od(XdYdZd) it is the moving coordinate system connected firmly with worm abrasion wheel.
Od(Xd0Yd0Zd0) it is the reference frame for determining worm abrasion wheel spatial position, it is fixed on space, OdZdAxis with
OdZd0Axis random time all overlaps.
Workpiece to be machined is cycloid gear, and tooth form is the equal space line of curtate epicycloid.Since cycloid gear is straight-tooth, therefore
Pitch plane is vertical with the rotation axis of workpiece, that is, participates in the point of engagement, is the point on contrate tooth profile.Now establish workpiece (cycloid tooth
Wheel) tooth surface equation M (X, Y, Z)：
X=X (ψ)
Y=Y (ψ)
Z=h
This formula is cycloid tooth surface equation, and since it is spur gear, h is constant, is the end face of cycloid gear when h=0.
According to the installation site and gear motion relationship of cycloid gear and worm abrasion wheel, can be obtained by coordinate transform
Expression formulas of the contact point M (X, Y, Z) in cutter connects firmly coordinate system, i.e. Contact line equations.Specific calculating process is as follows：
It is various more than arranging, it obtains：
In formula：
Contact line equations are obtained, when contact line is around OdZdAxis with angular speed θ rotate, and ensure helical pitch be T it is for the helical movement when
(as shown in Figure 4), movement locus are the helicoid of worm abrasion wheel, and expression formula is as follows：
I.e.
Work as XdmWhen=0, the axial blade form equation of worm abrasion wheel is obtained, indicates as follows in tool coordinate system：
Ydz=Xdsinθ+Ydcosθ
Worm abrasion wheel and the normal direction flank of tooth internal messing that cycloid gear is really in worm abrasion wheel are ensureing stringent spiral fortune
When dynamic, the angle between normal section and shaft section is λ (as shown in Figure 5), therefore normal direction blade form equation is in tool coordinate system
It indicates as follows：
Xdf=Xdcos(θ-θ1)-Ydsin(θ-θ1)
Ydf=Xdsin(θ-θ1)+Ydcos(θ-θ1)
Wherein,
Since the form equation of the above normal section is established in tool coordinate system, XdfBe relative to tool coordinate system and
Speech.When individually establishing coordinate system in normal section, blade profile is：
According to above derivation calculating process, you can the form equation for obtaining worm abrasion wheel, to modify out the snail of needs
Bar grinding wheel carries out digital control processing.
Fig. 6 is machine tool main body structural schematic diagram, integrally expresses the primary structure distribution of lathe, wherein：1 is grinding machine base
Seat, 2 be workpiece clamping table, and 3 be work piece holder, and 4 be Diamant roller (and thimble) clamping bench, and 5 be emery wheel, and 6 be main shaft
Electric rotating machine, 7 be worm abrasion wheel cutter, and 8 be online gauge head, and 9 be ball wire rod mechanism, 10 be machine tool guideway (include mainly X,
Y, the linear guide in tri- directions Z).
Grinding machine carries out cycloid gear processing and is as follows:
The clamping of cycloid gear blank：Since the cycloidal-pin wheel in actual RV retarders is to use in pairs, used to reduce
In rigging error can reduce cycloid tooth to the maximum extent so in process according to the situation clamping of actual use
The driving error of wheel.
The fixture that specially designs as shown in fig. 7, using traditional plane and two pits positioning method, the chamfered edge pin difference on both sides
Limit the rotational freedom of a gear blank.The chamfered edge pin three by clamping bench, straight pin, one side of first cycloid gear blank carries out
Positioning；Second cycloid gear blank is determined by the chamfered edge pin three of the upper surface of first cycloid gear blank, straight pin, another side
Position, is used in combination locking nut to clamp.Here, the vertical direction of the fabrication hole and location hole of two gear blanks in spatial position overlaps, greatly
Small difference avoids interference with and crosses positioning.
The grinding of cycloid gear is to knife：At clamping bench, the use of positioning pin can determine the tooth socket and tooth top of cycloid gear blank
Exact position is equipped with online gauge head on worm abrasion wheel main shaft, can accurately determine the exact position of worm abrasion wheel；
The initial engagement position of worm abrasion wheel and cycloid gear blank is calculated according to the theory of engagement, as shown in figure 8, using digital control system, essence
Really initial position co-ordinates of the control worm abrasion wheel and cycloid gear blank in lathe, are arranged the suitable amount of feeding, you can ground
Cut processing.
Worm abrasion wheel is refaced：It is carried out as grinding produces, worm abrasion wheel can be gradually worn out, and be added to reach
Work accuracy class requirement, it is therefore desirable to worm abrasion wheel be carried out to reface finishing, then readjust grinding parameter, kept for adding for lathe
Work precision；Worm abrasion wheel is moved to along machine Z-axis direction at emery wheel, according to online probe location, passes through digital control system tune
The suitable amount of feeding is arranged in the position of whole worm abrasion wheel and emery wheel, you can the weight of worm abrasion wheel is carried out according to preset program
Mill finishing.
In conclusion the Grinding Process of cycloid gear blank is：(increase Jie of each segments relative positions and its movement
Continue) in order to realize this method for grinding, designing grinding machine tool agent structure has：Lathe base, worm abrasion wheel central shaft, snail
Bar grinding wheel translation guide rail, work piece holder platform, online gauge head, emery wheel and other relevant accessory devices etc..With lathe base
Based on, worm abrasion wheel main shaft be mounted on lathe translation guide rail on, established centered on worm abrasion wheel X, Y, Z-direction coordinate
System, worm abrasion wheel main shaft form the installation (i.e. worm abrasion wheel helical angle) of certain angle along Y direction, and A axis realizes worm screw sand
For wheel axis in the rotating function of YZ planes, B axle is grinding wheel spindle, realizes that the high speed rotation of worm abrasion wheel, online gauge head are mounted on
Worm abrasion wheel spindle nose, positional precision is high, and On-machine Test function may be implemented, and C axis is overlapped with Z-direction, realizes workpiece tooth
The rotation of base, Y-axis are diamond roller main shaft, realize that the high speed rotation of emery wheel, emery wheel can follow clamp system real
The a certain range of movement of existing Z-direction.
First, the cycloid gear blank for putting two 180 ° of installations respectively on clamping bench 2, is used in combination locking nut 3 to clamp, Buddha's warrior attendant
Idler wheel clamping bench 4 moves down, and is contacted with fixture clamping bench 2, increases the rigidity of press cylinders pin, installation is complete for gear blank；According to engagement
Principle calculates the grinding position relationship of worm abrasion wheel and cycloid gear blank, passes through digital control system, adjustment worm abrasion wheel X, Y, Z tri-
Position on a direction；The suitable amount of feeding is arranged, you can be ground to knife with the contact of cycloid gear blank by worm abrasion wheel
Processing；It when process time or workpieces processing quantity reache a certain level, needs that worm abrasion wheel is carried out to reface adjustment, interrupt
Processing is readjusted worm abrasion wheel X, Y, the position in Z-direction, is modified to worm abrasion wheel using emery wheel 5；Worm screw sand
Wheel can be divided into corase grinding section and refining segment in process, more efficient can obtain use worm abrasion wheel in this way, can be fine
Control the surface quality of workpieces processing.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with
Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the right of invention.
Claims (5)
1. a kind of numerical control worm wheel grinding method of cycloid gear, uses on worm wheel grinding cycloid gear lathe,
It is characterized in that, the three-dimensional profile formula of corresponding worm abrasion wheel is calculated according to cycloid gear three-dimensional profile formula, according to worm screw sand
The three-dimensional profile formula of wheel modifies worm abrasion wheel, the worm abrasion wheel machining cycloidal gears gear blank completed using finishing；In clamping fixture table
Two cycloid gear gear blanks of upper disposable location and installation, determine workpiece space position；According to worm abrasion wheel cental axial position and turn
Angle and online probe location, determine the spatial position of worm abrasion wheel；Using worm abrasion wheel and cycloid gear meshing relation and
Spatial position, numerical programming program are carried out to knife and grinding；
By cycloid forming process, it can show that cycloid gear three-dimensional profile formula is as follows with geometrical relationship：
If the radius of pin gear sleeve is rZ, the common normal of flank profil arbitrary point and the angle of X-axis of cycloid are γ, and X-axis is with cycloid gear
End face center is dot and the axis that is radially arranged along cycloid gear；Then the equation of cycloid gear three-dimensional profile formula equal space line is such as
Under：
X=xo+rZcosγ
Y=yo-rZsinγ
In formula：
In formula, RZFor pinwheel radius；K1For the curtate ratio of cycloid；ZbFor the pinwheel number of teeth；ZaFor the cycloid gear number of teeth；ψ is that r is opposite
In the corner of R, r is the rolling circle radius to form cycloid, and R is to form cycloid base radius；
The three-dimensional profile formula computational methods of worm abrasion wheel are：According to cycloid gear three-dimensional profile formula, establish worm abrasion wheel with
The spatial position coordinate system relationship of cycloid gear calculates the contact line in engagement process according to the gear motion relationship of the two,
Contact line carries out helical scanning movement, obtains the three-dimensional profile formula of worm abrasion wheel；The three-dimensional profile formula of worm abrasion wheel is as follows：
Contact line equations：
The three-dimensional profile formula of additional spiral post exercise worm abrasion wheel：
Xdm=Xdcosθ-Ydsinθ
Ydm=Xdsinθ+Ydcosθ
Wherein, zgIt is the cycloid gear number of teeth,It is cycloid gear corner, λ is worm abrasion wheel setting angle, and X is the cycloid gear flank of tooth
Equation abscissa, Y are cycloid gear tooth surface equation ordinates, and K is the minimum distance of worm abrasion wheel axis and axis of workpiece, and θ is
Worm abrasion wheel helical angle, T are the pitches of worm abrasion wheel；Finally, bringing cycloid gear three-dimensional profile formula into calculating can obtain
The three-dimensional profile formula of worm abrasion wheel.
2. a kind of numerical control worm wheel grinding method of cycloid gear according to claim 1, which is characterized in that clamping fixture table
Two cycloid gear gear blanks of upper disposable location and installation, clamping fixture table use the localization method of plane and two pits, straight pin and chamfered edge pin
Two chamfered edge pins are arranged to limit gear blank edge respectively by the tooth socket and tooth top of cycloid gear gear blank in the straight line at place herein
The rotational freedom of straight pin reaches in the case of meeting accuracy class requirement, two cycloid tooth gear teeth of disposable location and installation
Base, and determine space tooth socket and the tooth top position of gear blank.
3. a kind of numerical control worm wheel grinding method of cycloid gear according to claim 2, which is characterized in that two are cut
Side pin limits rotational freedom of the gear blank along straight pin, the fabrication hole processed in the gear blank of cycloid gear and position of positioning hole respectively
It overlaps, differs in size, two gear blank location holes differ 180 °；The chamfered edge pin of limitation top gear blank degree of freedom is allowed to pass through the gear blank of lower part
Fabrication hole position top gear blank, limit rotational freedom, the fabrication hole of lower part gear blank passes through this chamfered edge pin, this chamfered edge pin is not
It has any impact to lower part gear blank；Meanwhile the top flank flat of lower part gear blank is the location and installation face of top gear blank.
4. a kind of numerical control worm wheel grinding method of cycloid gear according to claim 2, which is characterized in that in worm screw
On grinding wheel central shaft, the side of worm abrasion wheel devises online gauge head, is assured that the sky of worm abrasion wheel three-dimensional profile in this way
Between position, in conjunction with determining gear blank spatial position, using the meshing relation of the two, numerical programming program carry out to knife and grinding plus
Work.
5. a kind of numerical control worm wheel grinding method of cycloid gear according to claim 1, which is characterized in that for reality
Existing this method for grinding, design worm wheel grinding cycloid gear machine tool structure have：Lathe base, worm abrasion wheel main shaft, worm screw
Grinding wheel translation guide rail, work piece holder platform, online gauge head and emery wheel；Based on lathe base, the installation of worm abrasion wheel main shaft
Worm abrasion wheel translation guide rail on, established centered on worm abrasion wheel X, Y, Z-direction coordinate system, worm abrasion wheel main shaft is along Y-axis
Direction forms the installation of certain angle, and certain angle is worm abrasion wheel helical angle, and A axis realizes that worm abrasion wheel axis is flat in YZ
The rotating function in face, B axle are grinding wheel spindle, realize that the high speed rotation of worm abrasion wheel, online gauge head are mounted on worm abrasion wheel main shaft
End realizes that On-machine Test function, C axis are overlapped with Z-direction, realizes that the rotation of cycloid gear gear blank, Y-axis are emery wheel master
Axis realizes that the high speed rotation of emery wheel, emery wheel can follow clamp system to realize a certain range of movement of Z-direction.
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| CN105921823A (en) | 2016-09-07 |
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