CN103567855A - Variable camber groove grinding-based high-precision ceramic ball machining equipment - Google Patents
Variable camber groove grinding-based high-precision ceramic ball machining equipment Download PDFInfo
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- CN103567855A CN103567855A CN201310470402.3A CN201310470402A CN103567855A CN 103567855 A CN103567855 A CN 103567855A CN 201310470402 A CN201310470402 A CN 201310470402A CN 103567855 A CN103567855 A CN 103567855A
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- groove
- variable curvature
- abrasive disk
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- variable camber
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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
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/02—Lapping machines or devices; Accessories designed for working surfaces of revolution
- B24B37/025—Lapping machines or devices; Accessories designed for working surfaces of revolution designed for working spherical surfaces
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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
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/27—Work carriers
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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
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/34—Accessories
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Variable camber groove grinding-based high-precision ceramic ball machining equipment comprises a loading system, an upper grinding disc and a lower grinding disc; the upper and lower grinding discs are respectively connected with a driving device; the loading device is positioned on the upper grinding disc; a variable camber groove is formed in the lower grinding disc; the groove structure and the other grinding disc jointly form three machining contact points for grinding a ball blank to be machined; the equipment also comprises a workpiece circulation system; the inlet of the variable camber groove is connected with the outlet of the workpiece circulation system of which the inlet is connected with the outlet of the variable camber grove; the inlet of the variable camber groove is positioned in the center of the lower grinding disc. The variable camber groove grinding-based high-precision ceramic ball machining equipment can realize the higher machining precision and machining efficiency and demands on the equipment are lower.
Description
Technical field
The present invention relates to a kind of high-precision ceramic balls process equipment.
Background technology
High-precise ball is the critical elements in roundness measuring equipment, gyro, bearing and accurate measurement, and the benchmark of Chang Zuowei accurate measurement, has very consequence in precision equipment and Precision Machining.Particularly in ball bearing, use in a large number, it is the vital part of ball bearing, the precision of bearing ball (spherical deviation, ball diameter variation and surface roughness) directly affects the technical indicators such as kinematic accuracy, noise and life-span of ball bearing, and then affects the performance of equipment, instrument.Compare with traditional bearing steel ball material (GCr15), wear-resisting, high temperature resistant, corrosion-resistant, nonmagnetic, low-density (for 40% left and right of bearing steel) that the advanced ceramics materials such as silicon nitride have, the series of advantages such as coefficient of thermal expansion little (be bearing steel 25%) and elastic modelling quantity large (for 1.5 times of bearing steel), are considered to manufacture the optimal material of bearing ball of working under ramjet, high speed and precision lathe, precision instrument high speed, high accuracy and particular surroundings.
For the attrition process of Ceramic Balls, have some corresponding processing methods both at home and abroad, as: V-shaped groove grinding, circle groove polishing, conical disc polishing, angle of rotation ACTIVE CONTROL polishing, magnetic suspension polishing etc.In the process such as V-shaped groove attrition process, circle groove attrition process, conical disc attrition process, ball base can only be made " constant relative bearing " and grind motion, the spin axis that is ball base is fixed the space orientation of hollow shaft, and ball base is around a fixing spin axis rotation.Practice and theory analysis all show that " constant relative bearing " grinds motion is disadvantageous to the grinding of ball, the grinding trace that the contact point of ball base and abrasive disk forms on ball base surface is one group and take the annulus that the ball base axis of rotation is axle, abrasive disk carries out " repeatability " grinding along three coaxial circles traces of three contact points to ball base, be unfavorable for that ball base surface obtains evenly and grinds rapidly, in reality processing, need to rely on ball base to skid, the phenomenons such as stirring, make the spin axis of ball base and the relative workpiece orientation of hollow shaft occur slowly to change, reach the object of even grinding, but the variation of this spin angle is very slow, random, uncontrollable, thereby sphericity and the working (machining) efficiency of processing have been limited.And angle of rotation ACTIVE CONTROL grind have can independent rotation three abrasive disks, can change to adjust by controlling lap speed the orientation of the spin axis of ball base, ball base can be made " change relative bearing " and grind motion, the grinding trace on ball base surface is to take the Spatial Sphere surface curve that the ball base axis of rotation is axle, can cover the even whole ball base of major part surface, be conducive to ball base surface and obtain evenly, grind efficiently.In above-mentioned several different methods, with regard to required device complexity, the easiest with traditional V-shaped groove processing method, magnetic suspension grinding and angle of rotation ACTIVE CONTROL processing method relative complex.
In sum, variation how to control angle of rotation in ceramic ball processing can be equipped with the easiest mechanism simultaneously becomes the important research content that obtains high-precise ball.
Summary of the invention
In order to overcome the deficiency of cannot taking into account of existing high-precision ceramic balls processing and machining accuracy lower to matching requirements, efficiency, the invention provides and a kind ofly can realize higher machining accuracy and working (machining) efficiency, the high-precision ceramic balls process equipment that based on variable curvature groove grind lower to matching requirements again.
The technical solution adopted for the present invention to solve the technical problems is:
The high-precision ceramic balls process equipment that variable curvature groove grinds, comprises loading system, top lap and lower abrasive disk; Described top lap is connected with drive unit respectively with lower abrasive disk, described charger is positioned on top lap, on described top lap, have variable curvature groove, described groove structure forms three processing contact points that grind ball base to be processed together with another abrasive disk; Described equipment also comprises the workpiece circulatory system, the entrance of described variable curvature groove is connected with described workpiece circulatory system outlet, the outlet of the entrance of the described workpiece circulatory system and described variable curvature groove is joined, and the entrance of described variable curvature groove is positioned at the center of described lower abrasive disk.
Further, in described variable curvature groove, the line-spacing of variable curvature groove is that congruence distance, full displacement or equidistant displacement exist simultaneously.
Further, described variable curvature curve is helix, involute; Also can select other variable curvature lines.
The present invention adopts the helix V-shaped groove on upper and lower abrasive disk and lower abrasive disk to form abrasive structure, contact and grind with 3 of Ceramic Balls formations, lower abrasive disk just can be realized ball base rotatablely moving in two free degree directions completely as driving link, spheroid moves along spiral trajectory groove, realize " change relative bearing " and grind motion, grinding track is evenly distributed on the surface of ball, realizes the even grinding to Ceramic Balls surface.Pressue device applies elastic load to ball base, can make larger ball be subject to larger load, thereby can guarantee all the time good grinding size selectivity in process---and grind large ball, do not grind or grind less bead; The major axis of abrading-ball base, does not grind or grinds less minor axis, therefore can revise fast spherical deviation.Processing is initial, and ball to be processed enters V-shaped groove porch by the workpiece circulatory system in top lap center successively, and spheroid moves between upper and lower abrasive disk and in V-shaped groove, and reenters the workpiece circulatory system in V-shaped groove exit.Under the effect of pressure and abrasive material, after long-time processing, the abundant homogenize of the trueness error of each part and scale error, finally can obtain high accuracy and high conforming spheroid.According to lower abrasive disk, configure different helix V-shaped grooves, this new grinding method can adopt several versions, and its design philosophy is identical with operation principle.
1 signal with reference to the accompanying drawings, groove track 6, derives according to theory, obtains formula:
Above formula shows that angle of rotation θ is about radius of curvature ρ
afunction, along with ρ
achange and change, and θ ∈ (0 °, 90 °), therefore, the Changing Pattern of final angle of rotation depends primarily on type and the parameter (above-mentioned derivation is applicable to the various variable curvature track grooves such as involute, helix) of variable curvature track.
Compared with prior art, beneficial effect of the present invention is: this apparatus structure is comparatively simple, can reach the motion state of ACTIVE CONTROL ball base in process of lapping, realize the grinding balling-up campaign of " change relative bearing ", realize Ceramic Balls high accuracy, high batch conforming batch machining, significant to the Ultraprecision Machining of development bearing Ceramic Balls.
Accompanying drawing explanation
Fig. 1 is variable curvature groove track geometrical relationship schematic diagram.
Fig. 2 is one of variable curvature groove mode in the present invention--helix V-shaped groove processing ceramic ball device schematic diagram.
Fig. 3 is the schematic diagram of the isometric helix line tracking that adopts in the present invention.
Fig. 4 is the schematic diagram of the variable-pitch propeller line tracking that adopts in the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment 1
With reference to Fig. 2 and Fig. 3, a kind of high-precision ceramic balls process equipment grinding based on variable curvature groove, described variable curvature groove is helix V-shaped groove, comprises top lap 4, lower abrasive disk 1, the workpiece circulatory system 2 and loading system 3, and top lap 4 is connected with loading system 3; On lower abrasive disk 1, have helix V-shaped groove, the entrance of described helix V-shaped groove is connected with the described workpiece circulatory system 2 outlets, the outlet of the entrance of the described workpiece circulatory system 2 and described helix V-shaped groove is joined, and the entrance of described helix V-shaped groove is positioned at the center of described lower abrasive disk; V-shaped groove structure forms three processing contact points of mill ball base 5 together with top lap 4, and Ceramic Balls base 5 to be processed moves in helix V-shaped groove, and its angle of rotation also changes thereupon, realizes " change relative bearing " and grinds motion.
Processing is initial, and ball base 5 to be processed enters V-shaped groove porch by the workpiece circulatory system 2 in top lap center successively, and ball base 5 moves between upper and lower abrasive disk and in V-shaped groove, and reenters the workpiece circulatory system 2 in V-shaped groove exit.Under the effect of pressure and lapping liquid, after long-time processing, the material of each ball base is removed, and the abundant homogenize of trueness error and scale error finally can obtain high accuracy and high conforming ball finished product.
The abrasive material of processing is selected fixed abrasive material or free abrasive, and described Ceramic Balls base to be processed is at upper and lower abrasive disk working face, and determines evenly to be ground under the effect of load and abrasive material.
In described helix V-shaped groove, the line-spacing of helix is that congruence distance, full displacement or equidistant displacement exist simultaneously.
Utilizing the inventive method processing silicon nitride ceramic ball base, is originally that the line-spacing of the helix of strength is congruent distance, and processing conditions is as follows:
What following table was listed is the testing result of ceramic ball finished product.From testing result: the precision level of the Ceramic Balls processing has reached the G3 precision of steel ball.
Embodiment 2
With reference to Fig. 4, in the present embodiment, lower abrasive disk v shape groove adopts the variable-pitch propeller line shown in Fig. 3.All the other structures of the present embodiment are identical with embodiment 1 with implementation.
Embodiment 3
In the present embodiment, lower abrasive disk v shape groove adopts involute groove.Certainly, also can adopt other variable curvature grooves
Other structures and the implementation of the present embodiment are identical with embodiment 1.
Claims (3)
1. the high-precision ceramic balls process equipment grinding based on variable curvature groove, comprises loading system, top lap and lower abrasive disk; Described top lap is connected with drive unit respectively with lower abrasive disk, described charger is positioned on top lap, it is characterized in that: on described lower abrasive disk, have variable curvature groove, described groove structure forms three processing contact points that grind ball base to be processed together with another abrasive disk; Described equipment also comprises the workpiece circulatory system, the entrance of described variable curvature groove is connected with described workpiece circulatory system outlet, the outlet of the entrance of the described workpiece circulatory system and described variable curvature groove is joined, and the entrance of described variable curvature groove is positioned at the center of described lower abrasive disk.
2. the high-precision ceramic balls process equipment grinding based on variable curvature groove as claimed in claim 1, is characterized in that: in described helix V-shaped groove, the line-spacing of helix is that congruence distance, full displacement or equidistant displacement exist simultaneously.
3. the high-precision ceramic balls process equipment grinding based on variable curvature groove as claimed in claim 1 or 2, is characterized in that: described variable curvature curve is helix or involute.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310470402.3A CN103567855A (en) | 2013-10-10 | 2013-10-10 | Variable camber groove grinding-based high-precision ceramic ball machining equipment |
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| CN201310470402.3A CN103567855A (en) | 2013-10-10 | 2013-10-10 | Variable camber groove grinding-based high-precision ceramic ball machining equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103991025A (en) * | 2014-05-21 | 2014-08-20 | 浙江工业大学 | High-accuracy ball body machining method through eccentric type curvature-variable groove |
| CN103991017A (en) * | 2014-05-21 | 2014-08-20 | 浙江工业大学 | Device for machining high-precision sphere through shaft eccentric type curvature-variable groove |
| CN103991018A (en) * | 2014-05-21 | 2014-08-20 | 浙江工业大学 | High-accuracy sphere machining device based on eccentric variable-curvature V-shaped grooved disc |
| CN110216529A (en) * | 2019-07-18 | 2019-09-10 | 浙江科惠医疗器械股份有限公司 | A kind of bioceramic artificial joint spherical cyclic polishing machine |
| CN110340740A (en) * | 2019-07-18 | 2019-10-18 | 浙江科惠医疗器械股份有限公司 | The circulating magnetorheological polishing machine of artificial hip joint |
| CN112025541A (en) * | 2020-08-28 | 2020-12-04 | 中材高新氮化物陶瓷有限公司 | Silicon nitride ceramic micro-bead batch processing method |
| CN112108992A (en) * | 2020-09-10 | 2020-12-22 | 溆浦易锋精细瓷业有限责任公司 | Ceramic small part batch grinding device |
| CN115194638A (en) * | 2022-08-03 | 2022-10-18 | 浙江工业大学 | Underneath type variable-curvature groove sphere circulating grinding device and method |
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| JPS5924949A (en) * | 1982-08-03 | 1984-02-08 | Hitachi Zosen Corp | Sphere polishing device |
| JPH0557588A (en) * | 1991-08-29 | 1993-03-09 | Nippon Seiko Kk | Sphere grinding attachment |
| JP2001025948A (en) * | 1999-07-16 | 2001-01-30 | Noritake Co Ltd | Spherical grinding wheel |
| JP2002355742A (en) * | 2001-06-01 | 2002-12-10 | Advantest Corp | Ball machining device and ball machining method |
| CN2571538Y (en) * | 2002-10-02 | 2003-09-10 | 瓦房店轴承集团有限责任公司 | Circular lapping device for big steel ball of bearing |
| CN201058407Y (en) * | 2006-12-19 | 2008-05-14 | 浙江工业大学 | High-efficiency grinding device of high-precision ball double axial rotation abrasive disk |
| CN201227764Y (en) * | 2008-05-04 | 2009-04-29 | 浙江工业大学 | Double-disk rotation eccentric V shaped groove grinding miller |
| CN202943523U (en) * | 2012-10-31 | 2013-05-22 | 中山市乾润精密钢球制造有限公司 | High-precision steel ball grinding system |
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2013
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| JPS5924949A (en) * | 1982-08-03 | 1984-02-08 | Hitachi Zosen Corp | Sphere polishing device |
| JPH0557588A (en) * | 1991-08-29 | 1993-03-09 | Nippon Seiko Kk | Sphere grinding attachment |
| JP2001025948A (en) * | 1999-07-16 | 2001-01-30 | Noritake Co Ltd | Spherical grinding wheel |
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| CN2571538Y (en) * | 2002-10-02 | 2003-09-10 | 瓦房店轴承集团有限责任公司 | Circular lapping device for big steel ball of bearing |
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| CN201227764Y (en) * | 2008-05-04 | 2009-04-29 | 浙江工业大学 | Double-disk rotation eccentric V shaped groove grinding miller |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103991025A (en) * | 2014-05-21 | 2014-08-20 | 浙江工业大学 | High-accuracy ball body machining method through eccentric type curvature-variable groove |
| CN103991017A (en) * | 2014-05-21 | 2014-08-20 | 浙江工业大学 | Device for machining high-precision sphere through shaft eccentric type curvature-variable groove |
| CN103991018A (en) * | 2014-05-21 | 2014-08-20 | 浙江工业大学 | High-accuracy sphere machining device based on eccentric variable-curvature V-shaped grooved disc |
| CN110216529A (en) * | 2019-07-18 | 2019-09-10 | 浙江科惠医疗器械股份有限公司 | A kind of bioceramic artificial joint spherical cyclic polishing machine |
| CN110340740A (en) * | 2019-07-18 | 2019-10-18 | 浙江科惠医疗器械股份有限公司 | The circulating magnetorheological polishing machine of artificial hip joint |
| CN112025541A (en) * | 2020-08-28 | 2020-12-04 | 中材高新氮化物陶瓷有限公司 | Silicon nitride ceramic micro-bead batch processing method |
| CN112108992A (en) * | 2020-09-10 | 2020-12-22 | 溆浦易锋精细瓷业有限责任公司 | Ceramic small part batch grinding device |
| CN115194638A (en) * | 2022-08-03 | 2022-10-18 | 浙江工业大学 | Underneath type variable-curvature groove sphere circulating grinding device and method |
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Application publication date: 20140212 |