CN109434573A - The method for grinding and grinding structure of convex curve non-circular profile part - Google Patents
The method for grinding and grinding structure of convex curve non-circular profile part Download PDFInfo
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- CN109434573A CN109434573A CN201811624395.7A CN201811624395A CN109434573A CN 109434573 A CN109434573 A CN 109434573A CN 201811624395 A CN201811624395 A CN 201811624395A CN 109434573 A CN109434573 A CN 109434573A
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- 238000000227 grinding Methods 0.000 title claims abstract description 448
- 238000000034 method Methods 0.000 title claims abstract description 82
- 230000008569 process Effects 0.000 claims abstract description 38
- 238000009434 installation Methods 0.000 claims description 121
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000003754 machining Methods 0.000 abstract description 5
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- 239000004576 sand Substances 0.000 description 8
- 239000002421 finishing Substances 0.000 description 6
- 230000002045 lasting effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910001651 emery Inorganic materials 0.000 description 3
- 206010027202 Meningitis bacterial Diseases 0.000 description 2
- 201000009904 bacterial meningitis Diseases 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
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- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The method for grinding and grinding structure of convex curve non-circular profile part make part and grinding wheel revolve rotating around the revolution center of circle of part and grinding wheel, and grinding wheel is turned round around own axes simultaneously；The revolution-radius of grinding wheel and the revolution-radius of part are equal；When being ground initial position, the grinding allowance of the far point of wheel grinding parts profile；Part and grinding wheel revolve rotating around the respective revolution center of circle when grinding, grinding wheel is remained with the process planning trajectory tangential of the ground point of parts profile and is turned round around own axes, the distance between the first revolution center of circle and the second revolution center of circle persistently change along the line direction in two centers of circle of revolving in grinding process, when completing grinding, the distance between the first, second revolution center of circle is equal to particular value.The present invention makes the radiuses such as grinding wheel and part revolve in grinding process, converts circumference rotary motion in the same direction for the straight reciprocating motion of grinding wheel, and shock loading when no straight line is reversed maintains the high speed rotation of grinding wheel, improves machining accuracy and efficiency.
Description
Technical field
The invention belongs to technical field of mechanical processing more particularly to a kind of parts with convex curve non-circular profile shape
Method for grinding and grinding structure.
Background technique
Grinding is a kind of cutting technology using finishings piece surfaces such as high-speed rotating grinding wheels.Grinding can add
Special, the complicated forming table such as inside and outside cylindrical surface, circular conical surface and the plane of the various parts of work and screw thread, gear and spline
Face.It is ground the finishing step generally as piece surface, is such as used for crankshaft, eccentric shaft, camshaft, blade pump stator inner cavity,
Inner curve motor bore of stator, the finishing of the parts such as radial ball piston motor stator inner cavity, but can be used for the pre-add of blank
The roughing work of work and cleaning etc..In mechanical processing process, the excess metal of work surface on part is added by mechanical
The method of work is got rid of, to obtain the finished surface of design requirement, the thickness of reserved (need to the cut away) metal layer of piece surface
Degree is known as machining allowance.The surplus of grinding is grinding allowance.Before grinding, it to be directed to institute's grinding contour and grinding allowance
Grinding process planning is carried out, determine the number of total coils of grinding and respectively encloses distributed grinding allowance, sets the movement of ground point
Track, the motion profile are also referred to as process planning track.
The grinding mode of the parts such as traditional crankshaft, cam is follow grinding, as shown in Figure 1, grinding to part
When cutting, part 100 is turned round around the axis of itself, and grinding wheel 200 moves back and forth while high speed rotation along straight line (X-direction),
And begin with the feeding of stock removal, process medium plain emery wheel 200 and the process planning track of the ground point of the profile of part 100
Last phase is cut, to complete grinding process.The grinding of parts profile controls (Computerized frequently with computer digital
Numerical Control, abbreviation CNC) non-bacterial meningitis grinding, the non-bacterial meningitis grinding of CNC control has machining accuracy high, quality
Easily controllable, high-efficient feature.But this traditional grinding mode is that part is turned round around own axes, and grinding wheel is with part
The variation of profile polar diameter and straight reciprocating motion, the linear motion of grinding wheel commutate at the pole of contour curve.Due to by straight line
The influence of axis inertial load, the linear motion response lag of grinding wheel be easy to cause parts profile to occur owing to cut at curve pole
Or cross and cut, it is difficult to guarantee grinding accuracy, the frequency that such as to improve grinding accuracy will move back and forth grinding wheel limits, this nothing
Doubt the raising that can restrict grinding efficiency.
Application No. is 201010129465.9 Chinese invention patent applications to propose a kind of new crankshaft grinding process.?
When being ground the rod journal of crankshaft, crankshaft is rotated around the centre of gyration of its own, the revolution due to rod journal relative to crankshaft
Center has certain eccentricity, therefore in crank up, rod journal is done using the centre of gyration of crankshaft as the center of circle, with bias
Away from the circular motion for radius.Grinding wheel while around the centre of gyration rotation of itself, press default simultaneously by the centre of gyration of grinding wheel
Path curves are mobile, so that the high point of grinding wheel is always ground the high point of rod journal, the mode pair of rounding in addition
Crankshaft surface carries out grinding.This method solve impact when crankshaft tradition grinding processing method medium plain emery wheel linear motion commutates
The problem of load influences grinding quality, this method are to keep the same of same-phase using the revolution of grinding wheel and the rotation of rod journal
To complete to be ground, the essence of movement is that (crank rotation center and grinding wheel public affairs are fixed in a side of a parallelogram for step movement
Turn the distance in the center of circle), two adjacent sides on the side do the (revolution half of the eccentricity, grinding wheel of rod journal of the synchronous rotation of same-phase
Diameter), the opposite side on the side is translatable (distance of the grinding wheel rotation center to rod journal center).This method cannot be used for processing evagination
The part of line non-circular profile, application range are restricted.
Summary of the invention
The purpose of the present invention is to provide a kind of efficient, methods for being ground convex curve non-circular profile part.
In order to realize that purpose, the present invention take following technical solution:
The method for grinding of convex curve non-circular profile part, is ground, method and step for the outer profile to part are as follows:
Part is set, makes part that can revolve around the first revolution center of circle；
Grinding wheel is set, makes grinding wheel that can revolve around the second revolution center of circle, grinding wheel can turn round simultaneously around own axes；The public affairs of grinding wheel
The revolution-radius for turning radius and part is equal, and revolution-radius R meets: R >=rmaxAnd (R+L1)≥R1, wherein rmaxFor parts profile
Maximum polar diameter, L1For the half of the length of the line of two intersection points of the installation reference line and parts profile of part, R1For part
The radius of curvature of the far point of profile；
The distance between the first revolution center of circle of setting and the second revolution center of circle, when being ground initial position, the first revolution circle
The distance between the heart and the second revolution center of circle are equal to L1+Rs+ δ, the grinding allowance of the far point of wheel grinding parts profile, RsFor sand
The radius of wheel, δ are grinding allowance；
Part and grinding wheel revolve rotating around the respective revolution center of circle, and grinding wheel remains and the ground point of parts profile
Process planning trajectory tangential is simultaneously turned round around own axes, is ground to part, the first revolution center of circle and second in grinding process
Revolve the distance between center of circle reduces along the line direction in two centers of circle of revolving, when completing grinding, the first revolution center of circle and the
The distance between two revolution centers of circle are equal to L1+Rs。
The method for grinding of convex curve non-circular profile part, is ground, method and step for the Internal periphery to part are as follows:
Part is set, makes part that can revolve around the first revolution center of circle；
Grinding wheel is set, makes grinding wheel that can revolve around the second revolution center of circle, grinding wheel can turn round simultaneously around own axes；The public affairs of grinding wheel
The revolution-radius for turning radius and part is equal, and revolution-radius R meets: R >=rmaxAnd (R+L1)≥R1, wherein rmaxFor parts profile
Maximum polar diameter, L1For the half of the length of the line of two intersection points of the installation reference line and parts profile of part, R1For part
The radius of curvature of the far point of profile；The radius of grinding wheel is less than the minimum profile curvature radius equal to parts profile；
The distance between the first revolution center of circle of setting and the second revolution center of circle, when being ground initial position, the first revolution circle
The distance between the heart and the second revolution center of circle are equal to L1-Rs- δ, the grinding allowance of the far point of wheel grinding parts profile, RsFor sand
The radius of wheel, δ are grinding allowance；
Part and grinding wheel revolve rotating around the respective revolution center of circle, and grinding wheel remains the ground point with the profile of part
Process planning trajectory tangential and turned round around own axes, part is ground, the first revolution center of circle and the in grinding process
Two revolution the distance between centers of circle increase along the line direction in two centers of circle of revolving, when completing grinding, the first revolution center of circle and
The distance between second revolution center of circle is equal to L1-Rs。
More specifically, when the ray of the base point of installation from the first revolution center of circle to part and from the second revolution center of circle to sand
The direction for taking turns the perpendicular ray of own axes is identical, and when being located along the same line, which is grinding initial position.
More specifically, the installation reference line of part determines by the following method: determining at least one in the profile of part
Point, there are the straight lines that at least one crosses the point, and straight line itself and straight line are overlapped with the normal direction of two intersection points of parts profile；When only
When having straight line to meet straight line itself and straight line to be overlapped with the normal direction of two intersection points of parts profile, which is part
Installation reference line is looked for when having a plurality of straight line to meet straight line itself and straight line to be overlapped with the normal direction of two intersection points of parts profile
Out with the shortest straight line of wire length of two intersection points of parts profile in these straight lines, which is
For the installation reference line of part, the midpoint of the line of two intersection points of installation reference line and parts profile is the reference for installation of part
Point, the base point of installation of part is positioned at the revolution-radius end of part, a revolution half of installation reference line and part when installation
Diameter is overlapped；The motion profile of the base point of installation is the revolution circumference of part, and the motion profile of grinding wheel own axes is grinding wheel
Revolution circumference.
More specifically, the far point of the parts profile is two intersection point mean curvature radiuses of installation reference line and parts profile
Lesser intersection point, then the biggish intersection point of radius of curvature is the near point of parts profile；When the radius of curvature of two intersection points is equal, with
After part installation, distance first revolves the farther away intersection point in the center of circle as far point, and distance first revolves the closer intersection point in the center of circle as near point.
The present invention also provides a kind of grinding structures of convex curve non-circular profile part, comprising: part installation position, described zero
Part installation position can revolve around the first revolution center of circle；Grinding wheel, the grinding wheel can be around the second revolution center of circle revolution and can be around itself axis
Line revolution, the revolution-radius of part installation position and the revolution-radius of grinding wheel are equal, the part being set on the part installation position
Axis it is parallel with the grinding wheel own axes, when part and grinding wheel rotate, grinding wheel remains ground with parts profile
The process planning trajectory tangential of point；The first revolution center of circle and second revolution center of circle can be along the companies in two centers of circle of revolving
Line relative movement.
More specifically, when being ground the outer profile of part, between the first revolution center of circle and second revolution center of circle
Distance is from O1O2=L1+Rs+ δ is decreased to O1O2=L1+Rs；When being ground the Internal periphery of part, the first revolution center of circle and described the
Two revolution the distance between centers of circle are from O1O2=L1-Rs- δ increases to L1-Rs；Wherein, O1O2For the first revolution center of circle and the second revolution
The distance between center of circle, L1For the half of the length of the line of two intersection points of the installation reference line and parts profile of part, RsFor
The radius of grinding wheel, δ are grinding allowance, and when being ground Internal periphery, the radius of grinding wheel is less than or equal to the minimum profile curvature radius of parts profile.
From the above technical scheme, the present invention is directed in convex curve non-circular profile grinding process, grinding wheel spindle linear reciprocation
The inertial load of movement restricts the problem of machining accuracy and processing efficiency, proposes a kind of isometrical revolution circular path method for grinding,
Part, grinding wheel are separately mounted to the revolution-radius end of equal length, part only revolves around revolution axle center, rotation does not occur,
While grinding wheel high speed rotation around another revolution axle center revolve, by grinding wheel radius and parts profile determine two revolution centers of circle it
Between distance, the distance is with feed variation.It is rotate in same direction on part and the revolution circumference of each leisure of grinding wheel oneself, grinding wheel is in its public affairs
Turn the point of contact on the process planning track for the ground point for following parts profile on circumference, by grinding wheel revolution and part revolution
The lasting variation of phase difference, the revolution axle center of grinding wheel revolution center of circle confronting parts do lasting linear motion in the same direction realize be ground into
It gives, realizes grinding.Grinding process keeps the process planning track of grinding wheel and the ground point of part evagination line profile tangent always,
With grinding track close approximation between adjacent discrete point, the frequently reversed impact of linear axis is eliminated, the linear reciprocation of grinding wheel is transported
Turn turns to circumference rotary motion in the same direction, shock loading when no straight line is reversed, while keeping the high speed rotation of grinding wheel, can be improved
Grinding accuracy and grinding efficiency.
Detailed description of the invention
It in order to illustrate the embodiments of the present invention more clearly, below will be to required use in embodiment or description of the prior art
Attached drawing do simple introduction, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the schematic diagram of traditional grinding；
Fig. 2 is the schematic diagram of method for grinding of the present invention；
Fig. 3 a to Fig. 3 h is the different conditions schematic diagram in part outer profile grinding process；
Fig. 4 is the schematic diagram that grinding status is originated when being ground part Internal periphery；
Fig. 5 a to Fig. 5 h is the different conditions schematic diagram in part Internal periphery grinding process；
Fig. 6 is the schematic diagram for being ground another part outer profile；
Fig. 7 is the schematic diagram for being ground another part Internal periphery；
Fig. 8 is the structural schematic diagram that the lathe of the method for the present invention grinding part can be used；
Fig. 9 is the cross-sectional view of the line A-A along Fig. 8；
Figure 10 is the cross-sectional view of the line B-B along Fig. 8；
Figure 11 is the top view of Fig. 8；
Figure 12 is the structural schematic diagram that another lathe of the method for the present invention grinding part can be used；
Figure 13 is that lathe shown in Figure 12 loads onto the schematic diagram after grinding wheel.
A specific embodiment of the invention is described in more detail below in conjunction with attached drawing.
Specific embodiment
In order to above and other objects of the present invention, feature and advantage can be become apparent from, the embodiment of the present invention is cited below particularly,
And cooperate appended diagram, it is described below in detail.
If a plane curve is always located in the same side of its every bit tangent line, which is convex curve.Evagination line wheel
On exterior feature polar diameter by monotonic increase to monotone decreasing critical point, or by monotone decreasing to monotonic increase critical point be contour curve
Pole.Contour curve pole can be a point, be also possible to the one section circular arc concentric with evagination line profile coordinate pole.
The present invention for convex curve non-circular profile part (i.e. the cross-sectional shape of part be non-circular convex curved shape,
The profile in explanation each means the shape of the cross section of part below), propose a kind of isometrical revolution circular path method for grinding.It crosses
The straight line at any point can meet at two o'clock with convex curve non-circular profile in convex curve non-circular profile, and the method for the present invention is suitable for meeting
The grinding of the convex curve non-circular profile of the following conditions: at least one point can be found in convex curve non-circular profile, is existed at least
The straight line of one mistake point, straight line itself can be overlapped with straight line with the normal direction of two intersection points of convex curve non-circular profile.When only
When having straight line to meet straight line itself and straight line to be overlapped with the normal direction of two intersection points of convex curve non-circular profile, which is zero
The installation reference line of part, when the method for thering is a plurality of straight line to be all satisfied straight line itself with straight line and two intersection points of convex curve non-circular profile
To when being overlapped, the shortest straight line of wire length in these straight lines with two intersection points of convex curve non-circular profile is found out, with the intersection point
The company of two intersection points of installation reference line of the shortest straight line of wire length as part, installation reference line and convex curve non-circular profile
The midpoint of line is the base point of installation of part.It crosses base point of installation and the straight line for being parallel to convex curve non-circular profile bus is evagination
The axis of line non-circular profile.Coordinate system is established using base point of installation as coordinate pole, it is each on available convex curve non-circular profile
The polar diameter of a point, so that it is determined that contour curve pole, the radius of curvature of contour curve pole and convex curve non-circular profile are most
Small radius of curvature RminWith maximum polar diameter rmax.The radius of curvature of two intersection points of installation reference line and convex curve non-circular profile is distinguished
For R1、R2, the lesser intersection point of radius of curvature is defined as to the far point Q of convex curve non-circular profile1, the biggish intersection point of radius of curvature is then
For the near point Q of convex curve non-circular profile2；When the radius of curvature of two intersection points is equal, any one intersection point can be set to profile
Far point, then another intersection point is then the near point of profile.Part installs the revolution that part is positioned at the base point of installation of part
Radius tip, it is desirable that installation reference line is overlapped with a revolution-radius of part.After part installation, relative near point, far point distance
The first revolution center of circle is farther out.
The method of the present invention enables part and grinding wheel move in a circle respectively (revolution) when carrying out grinding to part, and two
The center of circle arranged for interval of a motion profile (revolution), and revolution-radius is equal, the axis of grinding wheel and the axis of part are parallel.Its
In, part will not turn round (rotation) around own axes, and grinding wheel can have mercy on own axes (rotation axis) revolution at a high speed (rotation), i.e. sand
Wheel also turns round (rotation) around its axis while moving in a circle (revolution).The revolution-radius R of part and grinding wheel meets: R >=
rmax, and (R+L1)≥R1, L1For the half of installation reference line and the length of the line of two intersection points of convex curve non-circular profile, R1
For the radius of curvature of the far point of convex curve non-circular profile.Part moves in a circle when grinding, on the one hand grinding wheel one side rotation chases after
It moves in a circle with part, the grinding wheel process planning trajectory tangential with the ground point of parts profile always, to zero at point of contact
Part profile (grinding allowance) is ground.
With reference to the accompanying drawing, method for grinding of the invention is done into further instruction.It is taken turns using the method for the present invention
When exterior feature grinding, the base point of installation of part, installation reference line, contour curve pole, close is determined according to (inside/outside) profile of part
The installation parameters such as point and far point.As shown in Fig. 2, by taking the outer profile of ellipse as an example, it is first determined the installation reference line l of part 1,
A straight line is arbitrarily done at the geometrically symmetric center for crossing cartouche, and obtained straight line and ellipse meet at two o'clock, only with ellipse
Short axle or the straight lines of long overlapping of axles be able to satisfy straight line and be overlapped with the normal direction of oval intersection point and straight line itself, and it is excessively geometrically symmetric in
In the straight line that arbitrary point outside the heart is done, obtained straight line and elliptical two intersection points, the normal direction of only one all most intersection point
It is overlapped with straight line itself；And in elliptical short axle and long axis, the length of short axle is most short, therefore using short axle as the peace of part 1
Reference line l is filled, the midpoint (that is, elliptical geometrically symmetric center) of short axle is base point of installation A.Since ellipse is symmetric figure,
Therefore short axle is equal with the radius of curvature of elliptical two point of intersection, any one in two intersection points all can serve as elliptical
Far point.
Then, the installation site of part 1 and grinding wheel 2 can be determined according to the installation parameter of part 1；O in Fig. 21For part 1
The revolution center of circle (first revolution the center of circle), O2For the revolution center of circle (the second revolution center of circle) of grinding wheel 2, R is revolution-radius, RsFor sand
The radius of wheel 2, the base point of installation A of part 1 are located at the end of the revolution-radius of part 1, the i.e. edge base point of installation A of part 1
The revolution circumference of part 1 is mobile；The installation reference line l of the part 1 and revolution center of circle O of part 11Between 1 base point of installation A of part
Line coincident, i.e. the installation reference line l of part 1 and a revolution-radius of part 1 are conllinear, relative to the near point of part, part
Revolution center of circle O of the far point apart from part 11Farther out.
(rotation) axis of grinding wheel 2 is located at the revolution-radius end of grinding wheel 2, the public affairs of (rotation) axis of grinding wheel 2 along grinding wheel 2
It is mobile to turn circumference.The revolution-radius for extending grinding wheel 2, makes the excircle of itself and grinding wheel 2 meet at two o'clock, wherein distance second revolves
Center of circle O2Close intersection point is the near point of grinding wheel, the revolution of distance second center of circle O2Remote intersection point is the far point of grinding wheel, with the second revolution circle
Heart O2For the center of circle, [R-Rs, R+Rs] it is the grinding area that the determining annular section of radius is grinding wheel 2.The installation base of part 1
The revolution of directrix l and first center of circle O1On the same line, (convex curve is non-for part for line between the base point of installation A of part
Circle) profile far point to first revolution center of circle O1Distance be R+L1, the near point of part (convex curve is non-circular) profile to the first revolution
Center of circle O1Distance be R-L1；When from first revolution center of circle O1To part base point of installation A ray with from second revolution the center of circle
O2It is identical with the direction of perpendicular ray of grinding wheel rotation axis, and when two rays are located along the same line, which can be determined
To be ground initial position, i.e., grinding wheel 2 from the far point of parts profile or the phase of near point to the grinding allowance of parts profile
Grinding.When being ground initial position, the first revolution center of circle O1With the second revolution center of circle O2The distance between O1O2Are as follows: O1O2=L1+Rs
+ δ (when grinding outer profile) or the first revolution center of circle O1With the second revolution center of circle O2The distance between O1O2For O1O2=L1-Rs-δ
(when grinding Internal periphery), δ is grinding allowance；Preferably, by the first revolution center of circle O1Company between the base point of installation A of part
Position when line is horizontal and when being located along the same line with the revolution-radius in 2 horizontal direction of grinding wheel is as grinding initial position
(Fig. 2), grinding starting when be from the phase of the far point of parts profile be ground, i.e., when being ground initial position, grinding wheel 2 is right
The grinding allowance of the far point of parts profile is ground.When being ground Internal periphery, the radius of grinding wheel 2 is less than equal to parts profile
Minimum profile curvature radius, i.e. Rs≤Rmin。
Determine the installation site of part 1 and grinding wheel 2 and after the installation is completed, the grinding since being ground initial position,
In the process, part 1 only revolves, along revolution circular motion, its own will not rotation, grinding wheel 2 follows part 1 always and does public affairs
Transhipment is dynamic, and keeps the process planning trajectory tangential with the ground point of 1 profile of part, the also high speed rotation simultaneously of grinding wheel 2, to part
Profile allowance carries out grinding or carries out finishing grinding to parts profile.
During being ground outer profile, the first revolution center of circle O1With the second revolution center of circle O2Between justify along two revolution
The line of the heart relatively moves, and makes the first revolution center of circle O1With the second revolution center of circle O2The distance between O1O2It is lasting to reduce in fact
Existing grinding and feeding, when grinding allowance all removes, O1O2=L1+Rs；During being ground Internal periphery, the first revolution center of circle O1With
Second revolution center of circle O2Between along two revolve the centers of circle line relatively move, make the first revolution center of circle O1With the second public affairs
Turn center of circle O2The distance between O1O2Lasting increase realizes grinding and feeding, when grinding allowance all removes, O1O2=L1-Rs。
For example, for the part of oval outer profile shown in Fig. 2, the long axis of the oval outer profile of the part it is a length of
90mm, the then maximum polar diameter r of profilemaxFor 45mm, short axle is installation reference line, a length of 50mm of short axle, then minimum polar diameter is
The radius of curvature of the point of intersection of 25mm, installation reference line and outer profile is 45*45/25=81mm.When due to grinding outer profile, sand
It takes turns radius not constrained by the minimum profile curvature radius of profile, grinding wheel radius 8mm can be ground the ellipse outer profile.Part and
The radius R of the revolution circumference of grinding wheel needs to meet: R >=rmax, and (R+L1)≥R1, i.e. R >=45 and (R+25) >=81 can be by zero
The radius R of the revolution circumference of part and grinding wheel is set as 60mm.The grinding allowance δ of part is 5mm.
Part 1 and grinding wheel 2 are installed respectively, when grinding initial position shown in Fig. 2, from the first revolution center of circle O1It arrives
Ray between the base point of installation A of part with from the second revolution center of circle O2Directions of rays phase between 2 rotation center of grinding wheel
Together, it and is located along the same line, grinding wheel 2 is ground the grinding allowance of the far point of 1 outer profile of part, the first revolution center of circle O1With second
Revolve center of circle O2The distance between O1O2It is set as O1O2=L1+Rs+ δ=25+8+5=38mm.After part and grinding wheel all install,
Start to revolve, be ground.
Point on part outer profile (or Internal periphery) along its method outward (or inward)) offset RsDistance after, be exactly grinding should
The position of grinding wheel axis (rotation center) when point.All the points on part outer profile (or Internal periphery) all outside its normal direction (or to
It is interior) offset RsDistance after, being formed with radius is RsWheel grinding part outer profile (or Internal periphery) when grinding wheel rotation
Track of the center relative to part outer profile (or Internal periphery), the track and part outer profile (or Internal periphery) equidistantly, referred to as zero
The equidistant profile of part profile.The revolution circumference of equidistant profile and grinding wheel has intersection point or point of contact, and intersection point or point of contact are in grinding wheel
Continuously successively occur on revolution circumference along grinding wheel revolution direction, intersection point or point of contact are on the profile of part along revolution opposite direction
Continuously successively occur.The equidistant profile of part outer profile is in the outside of Bei Moxiao part outer profile, corresponding, part Internal periphery
Equidistant profile is in the inside of ground part Internal periphery.
Fig. 3 a to Fig. 3 h is respectively the schematic diagram of each position when grinding wheel 2 is ground 1 outer profile of part, and grinding process does not include remaining
Amount grinding only considers the finishing grinding of final part (convex curve is non-circular) profile.It can be seen that and be ground from Fig. 3 a to Fig. 3 h
The equidistant profile of part outer profile is tangent or intersect with grinding wheel revolution circumference always in journey, and point of contact or intersection point successively occur,
Accordingly grinding wheel 2 is tangent with the outer profile of part 1 always.
Fig. 4 show the part with oval Internal periphery, a length of 100mm of the long axis of the Internal periphery of the part, then most
Big polar diameter is 50mm, and short axle is installation reference line, and a length of 60mm of short axle, then minimum polar diameter is 30mm, installation reference line and lubrication groove
The radius of curvature of wide point of intersection is 50*50/30=83mm, and the minimum profile curvature radius of elliptic contour is 30*30/50=18mm,
Grinding wheel radius 8mm can be ground the ellipse Internal periphery less than the minimum profile curvature radius of the elliptic contour.Part and grinding wheel
The radius R of revolution circumference needs to meet: R >=rmax, and (R+L1)≥R1, i.e. R >=50 and (R+30) >=83 can be by parts and sand
The radius R of the revolution circumference of wheel is set as 60mm.The grinding allowance δ of part is 5mm.
Part 1 and grinding wheel 2 are installed respectively, when grinding initial position shown in Fig. 4, from the first revolution center of circle O1It arrives
Ray between the base point of installation A of part with from the second revolution center of circle O2Directions of rays phase between 2 rotation center of grinding wheel
Together, it and is located along the same line, grinding wheel 2 is ground the grinding allowance of the far point of 1 Internal periphery of part, the first revolution center of circle O1With second
Revolve center of circle O2The distance between O1O2It is set as O1O2=L1-Rs- δ=30-8-5=17mm.After part and grinding wheel all install,
Start to revolve, be ground.Fig. 5 a to Fig. 5 h is respectively the schematic diagram of each position when grinding wheel 2 is ground 1 outer profile of part, is ground
Journey does not include surplus grinding, only considers the finishing grinding of final part (convex curve is non-circular) profile.It can be with from Fig. 5 a to Fig. 5 h
Find out, the equidistant profile of part Internal periphery is tangent or intersect with grinding wheel revolution circumference always in grinding process, and point of contact or friendship
Point successively occurs, and accordingly grinding wheel 2 is tangent with the Internal periphery of part 1 always.
Method for grinding of the invention can be sent out at a distance from the first revolution center of circle in grinding process is between the second revolution center of circle
Changing, generate as grinding process part and grinding wheel revolve in the same direction, on parts profile with the neighbouring curved section of grinding wheel relative to
The second revolution center of circle close to or far from movement, the ground point on parts profile is mobile to be ground direction, and a part is
Grinding curved section leaves the grinding area of grinding wheel, while another part curved section to be ground enters the grinding area of grinding wheel, is ground
It cuts at the point of contact for being a little located at parts profile and wheel grinding regional edge edge or on the curved section in wheel grinding region.For
For the grinding of outer profile, during the phase that near point is ground to from the phase of far point, with revolution, with grinding wheel it is neighbouring to
Curved section is ground far from the second revolution center of circle, during the phase that far point is ground to from the phase of near point, with revolution, with sand
Neighbouring curved section to be ground is taken turns close to the second revolution center of circle.For the grinding of Internal periphery, it is ground to from the phase of far point
During the phase of near point, with revolution, neighbouring curved section to be ground is far from the second revolution center of circle with grinding wheel, near point
During phase is ground to the phase of far point, with revolution, neighbouring curved section to be ground is close to the second revolution circle with grinding wheel
The heart.
From Fig. 3 a to 3h and Fig. 5, a to 5h be can be seen that in grinding process, parts profile and wheel grinding regional edge edge
Tangent, the revolution circumference of equidistant profile and grinding wheel is tangent；Or parts profile some curved section is in wheel grinding region, it should
The corresponding equidistant contour segment of curved section intersects with the revolution circumference of grinding wheel.Be ground parts profile far point when, parts profile it is remote
For point with wheel grinding regional edge along tangent, the revolution phase of parts profile and the revolution phase of grinding wheel are all 0 °；It is ground part wheel
When the near point of exterior feature, the near point of parts profile is with wheel grinding regional edge along tangent, the revolution phase of parts profile and the public affairs of grinding wheel
Phase inversion position is all 180 °.The normal direction of parts profile far point and the normal direction point coordinates pole of near point, the reference for installation of parts profile
Point is located at hookup wire midpoint, and common guarantee grinding passes through 0 ° and 180 ° of critical points.
When grinding, at grinding initial position (0 ° of phase), grinding wheel and parts profile are tangent in the far point of parts profile, etc.
Tangent away from profile and grinding wheel revolution circumference, the normal direction of grinding wheel far point and the revolution-radius of parts profile are conllinear, parts profile far point
Practical revolution-radius be more than or equal to the point radius of curvature.The point is equal to for the practical revolution-radius of parts profile far point
The case where radius of curvature, consecutive points are on revolution circumference, and part revolution, grinding wheel does not revolve, so that it may complete the grinding of the point；It is right
In parts profile far point practical revolution-radius be greater than the point radius of curvature the case where, the neighbouring curved section of far point is in far point
Practical revolution circumference in, curved section corresponding with the neighbouring curved section of far point is also in the revolution of far point corresponding points on equidistant profile
In circumference.With the revolution of part, the far point of parts profile and the neighbouring curved section of far point are equidistant to take turns far from the grinding wheel revolution center of circle
Homologous thread section on exterior feature is also separate, corresponding points of the far point of parts profile on equidistant profile must grinding wheel revolution circumference with
Outside, it is located at far point in the revolution circle of the corresponding points of equidistant profile adjacent to homologous thread section of the curved section on equidistant profile because of far point
In week, the neighbouring curved section of far point goes to O in any point in the homologous thread section of equidistant profile1O2It, must be in grinding wheel when straight line
It revolves within circumference, the curved section on equidistant profile between the point and far point corresponding points must intersect with grinding wheel revolution circumference, grinding wheel
Rotation center pursues the intersection point, the corresponding points of the rotation peripheral grinding convex curve non-circular profile of grinding wheel on revolution circumference.
As the neighbouring curved section to be ground of grinding wheel enters the grinding area of grinding wheel, when the non-curve pole of grinding contour, zero
The revolution circumference of the ground point of part profile and its neighbouring curved section to be ground and grinding wheel forms arc wedge, corresponding song on equidistant profile
The revolution circumference of line segment and grinding wheel has unique intersection point；In grinding contour curve pole, the neighbour of parts profile upper curve pole
Nearly curved section and wheel grinding region it is tangent or by grinding wheel can grinding area separate, homologous thread section and grinding wheel on equidistant profile
The circumference that revolves has unique point of contact or intersection point；The corresponding points of aforementioned point of contact or intersection point on parts profile are exactly ground point,
Corresponding points on grinding wheel are exactly grinding points.With the revolution in the same direction of part and grinding wheel, the point to be ground on parts profile is towards certainly
The revolution direction of body is advanced, while being moved relative to the second revolution center of circle to ground direction, and point to be ground, which is converted into, to be ground
It cuts a little, the ground point of parts profile is originated from far point, is moved on parts profile along revolution opposite direction.According to convex curve
Property, the grinding points position on grinding wheel is mobile towards to be ground direction on parts profile, therefore wheel grinding point is along grinding wheel
The reversed of revolution continuously moves on grinding wheel cylindrical week.For Internal periphery, the far point of grinding wheel is ground the remote of part Internal periphery
Point, the near point of the near point grinding part Internal periphery of grinding wheel；For outer profile, the near point of grinding wheel is ground the remote of part outer profile
Point, the near point of the far point grinding parts profile of grinding wheel.
It is carried out continuously as part and grinding wheel revolve in the same direction, the point to be ground on parts profile connects to the conversion of ground point
It is continuous to carry out, to adapt to be ground the corresponding polar diameter variation of point, the phase of parts profile revolution and grinding wheel revolution on convex parts profile
Poor consecutive variations, in grinding wheel cylindrical week, accordingly continuous moving, grinding process are carried out continuously grinding points on grinding wheel, until grinding work
It completes.
Before grinding, to determine the number of total coils of grinding and respectively enclose distributed grinding allowance, to form parts profile quilt
The motion profile of grinding points.Motion profile can be the profiling track equidistant with parts profile, O2Relative to O1Only profiling is enclosed one
The grinding for carrying out next circle profiling track again is completed in straight-line feed when track is completed, feeding；It is also possible to non-circular around convex curve
The spiral trajectory of profile, the corresponding amount of feeding of the mean allocation circle between the control point in each circle of spiral trajectory.More than
The setting for following grinding process parameters be conventional technology, be not innovative point of the invention, this will not be repeated here.
Grinding process of the invention is controlled using computer digital, and it is real that existing technological means can be used in Digital Control
It is existing, several disperse nodes are chosen on parts profile, grinding process keeps grinding wheel and ground parts profile in discrete control
It is tangent always at point, with grinding track close approximation between adjacent discrete point, complete the isometrical revolution circle of parts profile and grinding wheel
All track grindings.The selection of parts profile disperse node can by it is equiangularly spaced, etc. Grinding lengths interval choose, consider mill
Required precision is cut, determines the quantity at profile control point.Constant speed grinding can be carried out in grinding process, i.e., control parts profile and
The revolution angular speed of grinding wheel further increases grinding accuracy so that the arc length being ground in the unit time is equal.
Fig. 6 is the schematic diagram being ground to the part of a triangular-shaped profile, and the outer profile of the part is equilateral triangle
Shape, each angle round-corner transition of triangle.Cross the midpoint of any a line of triangle and the circle with the non-conterminous fillet in the side
The heart makees straight line, and straight line and triangular-shaped profile meet at two points, and the normal direction of the two intersection points is overlapped with the straight line, due to triangle
There are 3 sides, the straight line that each edge uses identical method that can be met the requirements, and this 3 straight lines and triangular-shaped profile
Two intersection points between line be equal in length, therefore the line of any straight line and two intersection points of triangular-shaped profile all may be used
Using the installation reference line as triangle part, the midpoint of two intersection point lines is base point of installation.The radius of curvature of straight line
Infinity, therefore select far point of the intersection point of installation reference line and circular arc as parts profile.
A height of 42mm of triangle in Fig. 6, the i.e. length of installation reference line are 42mm, then maximum polar diameter is 29.44mm,
Radius of curvature at far point is 5mm, minimum profile curvature radius 5mm, grinding allowance 1mm.Grinding wheel radius is 4mm, is ground foreign steamer
When wide, grinding wheel radius is not constrained by the minimum profile curvature radius of profile, can be ground the outer profile.The revolution circumference of part and grinding wheel
Radius need to meet: R >=rmax, and (R+L1)≥R1, i.e. R >=29.44 and (R+21) >=5, then by the public affairs of part and grinding wheel
Turn radius and is set as 36mm.When being ground initial position, grinding wheel 2 is ground the grinding allowance of the far point of 1 outer profile of part, setting first
Revolve center of circle O1With the second revolution center of circle O2The distance between O1O2For L1+Rs+ δ=21+4+1=26mm.Part and grinding wheel are all pacified
After installing, start to revolve, as the first revolution center of circle O1With the second revolution center of circle O2The distance between O1O2=L1+Rs=21+4=25
When, surplus grinding is completed.
Fig. 7 is the schematic diagram being ground to the part of a triangle Internal periphery, determines installation in the same manner
Reference line and base point of installation.A height of 44mm of triangle in Fig. 7, the i.e. length of installation reference line are 44mm, then maximum pole
Diameter is 30.44mm, and the radius of curvature at far point is 6mm, minimum profile curvature radius 6mm, grinding allowance 1mm.Grinding wheel radius is
4mm can be ground the Internal periphery less than the minimum profile curvature radius of profile.The radius of the revolution circumference of part and grinding wheel needs to meet:
R≥rmax, and (R+L1)≥R1, i.e. the revolution-radius of part and grinding wheel is then set as by R >=30.44 and (R+22) >=6
36mm.When being ground initial position, grinding wheel 2 is ground the grinding allowance of the far point of 1 Internal periphery of part, the first revolution of setting center of circle O1
With the second revolution center of circle O2The distance between O1O2For L1-Rs- δ=22-4-1=17mm.After part and grinding wheel all install, start
Revolution, as the first revolution center of circle O1With the second revolution center of circle O2The distance between O1O2=L1-RsWhen=22-4=18, surplus grinding
It completes.
It include part installation position and grinding wheel using the structure that the method for the present invention is ground convex curve non-circular profile part,
Mounting rack (seat) can be used for part installation position and grinding wheel or the modes such as manipulator or axis are set in lathe, machine table etc., part
Installation position can be fixture, installation axle etc., and part installation position can justify with respect to the first revolution center of circle revolution, grinding wheel with respect to the second revolution
Heart revolution, while grinding wheel can also be turned round around the axis of itself.It is set to the axis and grinding wheel itself of the part on part installation position
(revolution) axis it is parallel.First revolution-radius and the second revolution-radius are equal.Part and grinding wheel turn around the respective revolution center of circle
When dynamic, grinding wheel follows part always and keeps tangent with the profile of part, thus pass through itself rotation to the profile of part into
Row grinding.In grinding process, the first revolution center of circle and the second revolution center of circle occur relatively also along the line in two centers of circle of revolving
Mobile, when being ground the outer profile of part, lasting reduce in the distance between the first revolution center of circle and the second revolution center of circle realizes mill
Cut feeding；When being ground the Internal periphery of part, lasting increase in the distance between the first revolution center of circle and the second revolution center of circle is realized
Grinding and feeding.
Fig. 8, Fig. 9, Figure 10 and Figure 11 are the lathe being ground using the method for the present invention to convex curve non-circular profile part
Structural schematic diagram, the lathe of the structure can Internal periphery to part and outer profile carry out grinding.Such as Fig. 8 to Figure 11 institute
Show, grinding machine includes lathe bed 10, part installation pedestal 11 and grinding wheel installation pedestal 12, and grinding wheel installation pedestal 12 is set to cross
On slide unit 13, cross slid platform 13 includes orthogonal cross slide way 13a and longitudinal rail 13b, so that grinding wheel installation pedestal 12
Can transversely and longitudinal movement.Part main shaft 14 is provided in part installation pedestal 11, part main shaft is in part installation pedestal
It can be around oneself axes O in 111Rotation, 14 end face of part main shaft is provided with part installation position, the part installation position relative to
The eccentric axis of part main shaft 14 arranges, can according to the shape of parts profile along the radial adjustment eccentricity of part main shaft 14, zero
Part 1 is mounted at part installation position, and the axis of part 1 is parallel to part main-shaft axis, and the axis of part 1 is relative to part main shaft
Axis eccentricity be R.Part 1 is fixed on immovable at part installation position, but can do circumference with the rotation of part main shaft 14
Movement.
Grinding wheel revolution main shaft 15 is provided in grinding wheel installation pedestal 12, grinding wheel revolves main shaft 15 in grinding wheel installation pedestal 12
It can be rotated around the axis of oneself, the grinding wheel axis of rotation 16, the axis phase of the grinding wheel axis of rotation 16 are installed again in grinding wheel revolution main shaft 15
Eccentric axis installation for grinding wheel revolution main shaft 15, eccentricity also can adjust, and the axis of the grinding wheel axis of rotation 16 revolves to grinding wheel
The eccentricity of the axis of main shaft 15 is R, consistent relative to the eccentricity of the axis of part main shaft with the axis of part.Grinding wheel rotation
Axis 16 can rotate in grinding wheel revolution main shaft 15 around the axis of oneself, and grinding wheel 2 is mounted on the grinding wheel axis of rotation 16, the grinding wheel axis of rotation
16 axis is parallel with the grinding wheel revolution axis of main shaft 15, and 2 own axes of grinding wheel are overlapped with the axis of the grinding wheel axis of rotation 16, grinding wheel
2 can the rotation under the driving of the grinding wheel axis of rotation 16, while can grinding wheel revolve main shaft 15 driving under revolve, grinding wheel 2 is public
The rotation axis of grinding wheel 2 moves on the circumference that radius is R when turning.The axis of grinding wheel revolution main shaft 15 and the axis of part main shaft 14
Line is contour relative to guide level, and is parallel to each other.Part main-shaft axis, grinding wheel revolution main-shaft axis, grinding wheel axis of rotation axis
Line, grinding wheel own axes respectively in parallel with the guide rail direction of longitudinal rail.Part 1 revolves around the axis of part main shaft when grinding,
Grinding wheel 2 is followed part 1 around grinding wheel revolution main-shaft axis revolution, is ground to parts profile while rotation.Grinding wheel rotation
Electro spindle conventional in the prior art can be used in axis, and grinding wheel 2 is mounted on the main shaft of electro spindle, and electro spindle drives grinding wheel rotation
It simultaneously can be under the driving of grinding wheel revolution main shaft 15 around the axis revolution of grinding wheel revolution main shaft 15.In addition, part main shaft and grinding wheel
Revolution main shaft can also be substituted using turntable structure, and around the axis of itself, (motor is defeated by the driving of the driving units such as motor for turntable
Shaft axis) rotation, part installation position and the grinding wheel axis of rotation are eccentrically mounted on part turntable and grinding wheel turntable respectively, thus
When turntable rotates, part installation position and the grinding wheel axis of rotation are also moved in a circle using the center of turntable as the center of circle.
Figure 12 and Figure 13 is another structure that the method for the present invention can be used and be ground to convex curve non-circular profile part
Lathe schematic diagram, the lathe of the structure can carry out grinding to the outer profile of part.It is set on the lathe bed 10 of grinding machine
It is equipped with part installation pedestal 11 and grinding wheel installation pedestal 12, the part installation pedestal 11 and grinding wheel installation pedestal of this example grinding machine
12 are arranged side by side, i.e., the axis of part installation pedestal 11 is parallel with the axis of grinding wheel installation pedestal 12.Grinding wheel installation pedestal 12 is set
It is placed on cross slid platform 13, cross slid platform 13 includes orthogonal cross slide way 13b and longitudinal rail 13a.Grinding wheel installs base
Grinding wheel revolution main shaft 15 is set on seat 12, part main shaft 14 is set in part installation pedestal 11.Part 1 is set to positioned at part master
At part installation position on axis 14, grinding wheel 2 is set on the grinding wheel rotation main shaft 16 on grinding wheel revolution main shaft 15, part peace
Dress position and grinding wheel rotation main shaft 16 are respectively relative to part main shaft 14 and grinding wheel revolution 15 eccentric setting of main shaft, thus part main shaft
14 and grinding wheel revolution main shaft 15 when rotating, part 1 and grinding wheel 2 can do circumference fortune with part main shaft 14 and grinding wheel revolution main shaft 15
It is dynamic.As shown in Figure 12 and Figure 13, when part 1 and grinding wheel 2 move in a circle respectively, grinding wheel 2 can grind the outer profile of part 1
It cuts.
Isometrical revolution circular path method for grinding of the invention exists when eliminating traditional method for grinding medium plain emery wheel linear movement
Linear axis frequently reversed impact, convert circumference rotary motion in the same direction for the straight reciprocating motion of grinding wheel, no straight line is reversed
When shock loading, while keeping the high speed rotation of grinding wheel, effectively improve machining accuracy and processing efficiency.
The above described is only a preferred embodiment of the present invention, limitation in any form not is done to the present invention, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above are modified or are modified
For the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention
Any simple modification, equivalent change and modification to the above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. the method for grinding of convex curve non-circular profile part, is ground for the outer profile to part, it is characterised in that:
Part is set, makes part that can revolve around the first revolution center of circle；
Grinding wheel is set, makes grinding wheel that can revolve around the second revolution center of circle, grinding wheel can turn round simultaneously around own axes；The revolution of grinding wheel half
The revolution-radius of diameter and part is equal, and revolution-radius R meets: R >=rmaxAnd (R+L1)≥R1, wherein rmaxMost for parts profile
Big polar diameter, L1For the half of the length of the line of two intersection points of the installation reference line and parts profile of part, R1For parts profile
Far point radius of curvature；
The first revolution center of circle of setting and second revolution the distance between center of circle, when be ground initial position, the first revolution center of circle with
The distance between second revolution center of circle is equal to L1+Rs+ δ, the grinding allowance of the far point of wheel grinding parts profile, RsFor grinding wheel
Radius, δ are grinding allowance；
Part and grinding wheel revolve rotating around the respective revolution center of circle, and grinding wheel remains the technique with the ground point of parts profile
Planned trajectory is tangent and turns round around rotation axis, is ground to part, the first revolution center of circle and the second revolution in grinding process
The distance between center of circle reduces along the line direction in two revolution centers of circle, when completing grinding, the first revolution center of circle and the second public affairs
Turn the distance between center of circle equal to L1+Rs。
2. the method for grinding of convex curve non-circular profile part as described in claim 1, it is characterised in that: justify when from the first revolution
The heart to part base point of installation ray with from second revolution the direction of perpendicular ray of the center of circle to grinding wheel rotation axis it is identical,
And when being located along the same line, which is grinding initial position.
3. the method for grinding of convex curve non-circular profile part as described in claim 1, it is characterised in that: the reference for installation of part
Line determines by the following method: at least one point is determined in the profile of part, there are the straight line that at least one crosses the point, straight lines
Itself and straight line are overlapped with the normal direction of two intersection points of parts profile；When only straight line meets straight line itself and straight line and zero
When the normal direction of two intersection points of part profile is overlapped, which is the installation reference line of part, when there is a plurality of straight line to meet straight line
When itself and straight line are overlapped with the normal direction of two intersection points of parts profile, find out in these straight lines with two intersection points of parts profile
The shortest straight line of wire length, the shortest straight line of intersection point wire length are the installation reference line of part, installation reference line with
The midpoint of the line of two intersection points of parts profile is the base point of installation of part, and the base point of installation of part is positioned at zero when installation
The revolution-radius end of part, installation reference line are overlapped with a revolution-radius of part；The motion profile of the base point of installation is
The revolution circumference of part, the motion profile of grinding wheel rotation axis are the revolution circumference of grinding wheel.
4. the method for grinding of convex curve non-circular profile part as described in claim 1, it is characterised in that: the parts profile
Far point is two lesser intersection points of intersection point mean curvature radius of installation reference line and parts profile, then the biggish intersection point of radius of curvature
For the near point of parts profile；When the radius of curvature of two intersection points is equal, after being installed with part, distance first revolves the center of circle farther out
Intersection point be far point, distance first revolve the closer intersection point in the center of circle be near point.
5. the method for grinding of convex curve non-circular profile part, is ground for the Internal periphery to part, it is characterised in that:
Part is set, makes part that can revolve around the first revolution center of circle；
Grinding wheel is set, makes grinding wheel that can revolve around the second revolution center of circle, grinding wheel can turn round simultaneously around rotation axis；The revolution of grinding wheel half
The revolution-radius of diameter and part is equal, and revolution-radius R meets: R >=rmaxAnd (R+L1)≥R1, wherein rmaxMost for parts profile
Big polar diameter, L1For the half of the length of the line of two intersection points of the installation reference line and parts profile of part, R1For parts profile
Far point radius of curvature；The radius of grinding wheel is less than the minimum profile curvature radius equal to parts profile；
The first revolution center of circle of setting and second revolution the distance between center of circle, when be ground initial position, the first revolution center of circle with
The distance between second revolution center of circle is equal to L1-Rs- δ, the grinding allowance of the far point of wheel grinding parts profile, RsFor grinding wheel
Radius, δ are grinding allowance；
Part and grinding wheel revolve rotating around the respective revolution center of circle, and grinding wheel remains the work with the ground point of the profile of part
Skill planned trajectory is tangent and turns round around rotation axis, is ground to part, the first revolution center of circle and the second public affairs in grinding process
Turn the distance between center of circle to increase along the line direction in two centers of circle of revolving, when completing grinding, the first revolution center of circle and second
The distance between center of circle revolve equal to L1-Rs。
6. the method for grinding of convex curve non-circular profile part as claimed in claim 5, it is characterised in that: justify when from the first revolution
The heart to part base point of installation ray with from second revolution the direction of perpendicular ray of the center of circle to grinding wheel rotation axis it is identical,
And when being located along the same line, which is grinding initial position.
7. the method for grinding of convex curve non-circular profile part as claimed in claim 5, it is characterised in that: the reference for installation of part
Line determines by the following method: at least one point is determined in the profile of part, there are the straight line that at least one crosses the point, straight lines
Itself and straight line are overlapped with the normal direction of two intersection points of parts profile；When only straight line meets straight line itself and straight line and zero
When the normal direction of two intersection points of part profile is overlapped, which is the installation reference line of part, when there is a plurality of straight line to meet straight line
When itself and straight line are overlapped with the normal direction of two intersection points of parts profile, find out in these straight lines with two intersection points of parts profile
The shortest straight line of wire length, the shortest straight line of intersection point wire length are the installation reference line of part, installation reference line with
The midpoint of the line of two intersection points of parts profile is the base point of installation of part, and the base point of installation of part is positioned at zero when installation
The revolution-radius end of part, installation reference line are overlapped with a revolution-radius of part；The motion profile of the base point of installation is
The revolution circumference of part, the motion profile of grinding wheel rotation axis are the revolution circumference of grinding wheel.
8. the method for grinding of convex curve non-circular profile part as claimed in claim 5, it is characterised in that: the parts profile
Far point is two lesser intersection points of intersection point mean curvature radius of installation reference line and parts profile, then the biggish intersection point of radius of curvature
For the near point of parts profile；When the radius of curvature of two intersection points is equal, after being installed with part, distance first revolves the center of circle farther out
Intersection point be far point, distance first revolve the closer intersection point in the center of circle be near point.
9. the grinding structure of convex curve non-circular profile part characterized by comprising
Part installation position, the part installation position can revolve around the first revolution center of circle；
Grinding wheel, the grinding wheel can revolve and can turn round around the axis of itself around the second revolution center of circle, the revolution half of part installation position
The revolution-radius of diameter and grinding wheel is equal, and axis and the grinding wheel own axes for being set to the part on the part installation position are flat
Row, part and grinding wheel revolution be when being ground, the grinding wheel process planning trajectory tangential with the ground point of parts profile always；
The first revolution center of circle and second revolution center of circle can be relatively moved along the line in two centers of circle of revolving.
10. the grinding structure of convex curve non-circular profile part as claimed in claim 9, it is characterised in that: be ground the outer of part
When profile, the first revolution center of circle and second revolution the distance between center of circle are from O1O2=L1+Rs+ δ is decreased to O1O2=L1+Rs；
When being ground the Internal periphery of part, the first revolution center of circle and described second revolution the distance between center of circle are from O1O2=L1-
Rs- δ increases to L1-Rs；
Wherein, O1O2For the distance between the first revolution center of circle and the second revolution center of circle, L1For the installation reference line and part of part
The half of the length of the line of two intersection points of profile, RsFor the radius of grinding wheel, δ is grinding allowance, when being ground Internal periphery, grinding wheel
Radius be less than or equal to parts profile minimum profile curvature radius.
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| CN110370092A (en) * | 2019-06-28 | 2019-10-25 | 厦门理工学院 | A kind of longitudinal grinding outer circle axial surface roughness determines method, device and equipment |
| CN112059741A (en) * | 2020-09-29 | 2020-12-11 | 中国航发动力股份有限公司 | Method for processing engine rotor blade tenon end surface fillet |
| CN113319656A (en) * | 2021-06-25 | 2021-08-31 | 泉州华中科技大学智能制造研究院 | Grinding method for special-shaped workpiece |
| CN113510371A (en) * | 2020-04-09 | 2021-10-19 | 联合汽车电子有限公司 | Processing method and production device of special-shaped revolving body |
| CN114918744A (en) * | 2022-05-31 | 2022-08-19 | 西南交通大学 | Method for solving grinding track of machining rotary special-shaped shaft by using section difference grinding process |
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| CN110370092A (en) * | 2019-06-28 | 2019-10-25 | 厦门理工学院 | A kind of longitudinal grinding outer circle axial surface roughness determines method, device and equipment |
| CN113510371A (en) * | 2020-04-09 | 2021-10-19 | 联合汽车电子有限公司 | Processing method and production device of special-shaped revolving body |
| CN112059741A (en) * | 2020-09-29 | 2020-12-11 | 中国航发动力股份有限公司 | Method for processing engine rotor blade tenon end surface fillet |
| CN113319656A (en) * | 2021-06-25 | 2021-08-31 | 泉州华中科技大学智能制造研究院 | Grinding method for special-shaped workpiece |
| CN114918744A (en) * | 2022-05-31 | 2022-08-19 | 西南交通大学 | Method for solving grinding track of machining rotary special-shaped shaft by using section difference grinding process |
| CN114918744B (en) * | 2022-05-31 | 2023-05-05 | 西南交通大学 | Grinding track solving method for machining rotary special-shaped shaft by adopting segment difference grinding process |
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