CN107738069A - High precision machines people's reductor thin-wall bearing method for grinding - Google Patents
High precision machines people's reductor thin-wall bearing method for grinding Download PDFInfo
- Publication number
- CN107738069A CN107738069A CN201710897838.9A CN201710897838A CN107738069A CN 107738069 A CN107738069 A CN 107738069A CN 201710897838 A CN201710897838 A CN 201710897838A CN 107738069 A CN107738069 A CN 107738069A
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- grinding
- thin
- external diameter
- reductor
- wall bearing
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses high precision machines people's reductor thin-wall bearing method for grinding, the method for grinding includes the workpiece blank that the forging blank of reductor thin-wall bearing is processed into outer ring and inner ring respectively, is characterized in particular in：Including (1) outer ring Vehicle Processing；(2) inner ring Vehicle Processing；(3) outer ring mill processing；(4) inner ring mill processing；(5) inspection process.Change high precision machines people's reductor thin-wall bearing grinding process, improve the precision of part.
Description
Technical field
The present invention relates to machining equipment technical field, more particularly to a kind of high precision machines people reductor thin-wall bearing
Method for grinding.
Background technology
By semicentennial development, the direction of modern industry robot, which is developed, tends to lightness, but current from China
From the point of view of market, had a long way to go with state's outer bearing in terms of positioning precision, locating speed and the precision conservation degree, and produce this
The basic reason of problem be exactly be exactly part precision it is not up to standard.
For the outer ring of high precision machines people's reductor thin-wall bearing, technique too complex and the precision of part before are not
Height, it is divided into 2 stages of coarse-fine mill in terms of grinding before, respectively roughly grinds plane, corase grind is cylindrical, roughly grinds raceway groove, roughly grinds rib,
Fore shaft, stable processing, finished plane, fine cylindrical, fine grinding raceway groove and fine grinding fore shaft are roughly ground, last raceway groove superfinishing, grinds external diameter eventually,
But the required precision of rib is not high, so need not be to the meticulous corase grind of rib.
The content of the invention
To overcome disadvantages mentioned above, it is an object of the invention to provide a kind of grinding of high precision machines people reductor thin-wall bearing
Method, change high precision machines people's reductor thin-wall bearing grinding process, improve the precision of part.
In order to reach object above, the technical solution adopted by the present invention is：High precision machines people's reductor thin-wall bearing is ground
Cutting method, the method for grinding include the workpiece base that the forging blank of reductor thin-wall bearing is processed into outer ring and inner ring respectively
Material, is characterized in particular in：
(1) outer ring Vehicle Processing：External diameter Vehicle Processing-internal diameter Vehicle Processing-both ends of the surface Vehicle Processing-chamfering Vehicle Processing-is at tempering of quenching
Reason；
(2) inner ring Vehicle Processing：Rough turn internal diameter, the face of car first-thin in-car external diameter, thin the second face of car-buffing internal-and external diameter-car fall
Angle two sides-temper of quenching；
(3) outer ring mill processing：Corase grind plane-corase grind outer ring-corase grind hook lock-stabilization processing-finished plane-lappingout plane-
Refine external diameter-essence whole external diameter-fine grinding raceway groove-superfinishing raceway groove-whole flat lapping-external diameter superfinishing-hard car chamfering；
(4) inner ring mill processing：Corase grind plane-corase grind internal diameter-corase grind raceway groove-stabilization processing-finished plane-lappingout plane-
Refine raceway groove-fine grinding internal diameter-superfinishing raceway groove-whole flat lapping；
(5) inspection process is：Tested, be processed according to process above requirement, the production cycle using 500 sets of bearings
The amplitude of upper lifting is not that qualification rate is also significantly lifted it is obvious that the precision that still bearing reaches has greatly improved.Raceway groove
Scattered error can control substantially within 2 μ, while the running accuracy of finished product has greatly improved, and disclosure satisfy that national standard P4
Up to more than 90%.
Further, during the outer ring Vehicle Processing and inner ring Vehicle Processing, respectively according to the dimensional tolerance of workpiece, morpheme
The tolerance central value control processing dimension of tolerance, deviation cannot be greater than 0.01mm, and the allowance of reserved lappingout.
Further, during the outer ring Vehicle Processing and inner ring Vehicle Processing, in the mill process of outer ring and inner ring, point
Grinding accuracy is not controlled according to the dimensional tolerance of workpiece, the tolerance central value of form and position tolerance, deviation cannot be greater than 0.006mm, and
Reserved allowance.
Further, in the outer ring mill process, corase grind plane is cut using bear inner ring grooved railway grinding machine 3MK1310CB
Enter mill, it is 0.15mm~0.20mm to make its accuracy rating.
Further, in the outer ring mill process, corase grind hook lock is processed using roller, and the step of fore shaft size one is ground to
Position and channel dimensions leave surplus 0.02mm-0.05mm, follow-up fore shaft grinding can be cast out, its production effect can be greatly improved
Rate.
Further, in the outer ring mill process, finished plane uses upper M7475 surface grinding machines, utilizes its electromagnetism
Sucker holds one end completely, and another side is modified with the end face of emery wheel, and fine grinding workpiece size is scattered 4 μm, oval 2 μm, cone
2 μm of degree, 0.2 μm of surface roughness Ra value is big so as to effectively remove warpage caused by the deformation occurred after its stable processing,
Ensure its parallel error simultaneously.
Further, in outer ring mill process, lappingout plane using external diameter incision mill, respectively with fine grinding external diameter and
The whole external diameter two procedures of essence, it is 0.10mm~0.15mm to make its accuracy rating.
Further, in the outer ring mill process, fine grinding external diameter determines its ditch position using sample circle, and branch external diameter is ground, then
With its raceway groove of diamond pen single-point finishing, its ellipse, circularity, concentricity and ditch pendulum are controlled.
A kind of high precision machines people reductor thin-wall bearing method for grinding provided by the invention, for high precision machines, people subtracts
The outer ring of fast machine thin-wall bearing, technique too complex and the precision of part before be not high, because the required precision of rib is not high,
The step car of rib one is now changed into its method for grinding simultaneously in place by Vehicle Processing and is changed to technique to roughly grind plane, roughly grinds outer ring,
Ditch lock is roughly ground, stable processing, finished plane, lappingout plane, external diameter is refined, the whole external diameter of essence, refines raceway groove, superfinishing raceway groove, grind eventually
Plane, external diameter superfinishing, hard car chamfering.
Embodiment
Presently preferred embodiments of the present invention is described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that apparent clearly defined so as to be made to protection scope of the present invention.
High precision machines people's reductor thin-wall bearing method for grinding in the present embodiment, method for grinding include reductor is thin
The forging blank of wall bearing is processed into the workpiece blank of outer ring and inner ring respectively, is characterized in particular in：
(1) outer ring Vehicle Processing：External diameter Vehicle Processing-internal diameter Vehicle Processing-both ends of the surface Vehicle Processing-chamfering Vehicle Processing-is at tempering of quenching
Reason；
(2) inner ring Vehicle Processing：Rough turn internal diameter, the face of car first-thin in-car external diameter, thin the second face of car-buffing internal-and external diameter-car fall
Angle two sides-temper of quenching；
(3) outer ring mill processing：Corase grind plane-corase grind outer ring-corase grind hook lock-stabilization processing-finished plane-lappingout plane-
Refine external diameter-essence whole external diameter-fine grinding raceway groove-superfinishing raceway groove-whole flat lapping-external diameter superfinishing-hard car chamfering；
(4) inner ring mill processing：Corase grind plane-corase grind internal diameter-corase grind raceway groove-stabilization processing-finished plane-lappingout plane-
Refine raceway groove-fine grinding internal diameter-superfinishing raceway groove-whole flat lapping；
(5) inspection process is：Tested, be processed according to process above requirement, the production cycle using 500 sets of bearings
The amplitude of upper lifting is not that qualification rate is also significantly lifted it is obvious that the precision that still bearing reaches has greatly improved.Raceway groove
Scattered error can control substantially within 2 μ, while the running accuracy of finished product has greatly improved, and disclosure satisfy that national standard P4
Up to more than 90%.
During outer ring Vehicle Processing and inner ring Vehicle Processing, respectively according in the dimensional tolerance of workpiece, the tolerance of form and position tolerance
Center value controls processing dimension, and deviation cannot be greater than 0.01mm, and the allowance of reserved lappingout.
During outer ring Vehicle Processing and inner ring Vehicle Processing, in the mill process of outer ring and inner ring, respectively according to workpiece
Dimensional tolerance, the tolerance central value of form and position tolerance control grinding accuracy, deviation cannot be greater than 0.006mm, and reserved allowance.
In the mill process of outer ring, corase grind plane carries out incision mill using bear inner ring grooved railway grinding machine 3MK1310CB, makes its precision
Scope is 0.15mm~0.20mm.
In the mill process of outer ring, the step of fore shaft size one is ground to position and channel dimensions by corase grind hook lock using roller processing
Surplus 0.02mm-0.05mm is left, follow-up fore shaft grinding can be cast out, its production efficiency can be greatly improved.
In the mill process of outer ring, finished plane uses upper M7475 surface grinding machines, and one is held completely using its magnechuck
End, is modified with the end face of emery wheel to another side, and fine grinding workpiece size is scattered 4 μm, oval 2 μm, 2 μm of taper, rough surface
0.2 μm of Ra values are spent, it is big so as to effectively remove warpage caused by the deformation occurred after its stable processing, while ensure that its is parallel
Difference.
In the mill process of outer ring, lappingout plane is using external diameter incision mill, respectively with fine grinding external diameter and the whole external diameter twice of essence
Process, it is 0.10mm~0.15mm to make its accuracy rating.
In the mill process of outer ring, fine grinding external diameter determines its ditch position, branch external diameter mill using sample circle, then is repaiied with diamond pen single-point
Its whole raceway groove, control its ellipse, circularity, concentricity and ditch pendulum.
A kind of high precision machines people reductor thin-wall bearing method for grinding that the present invention uses, including corase grind stage and fine grinding
Stage, wherein：
The corase grind stage
First on original rough grinding process, equally roughly ground using vertical grinding machine with double end faces surface grinding machine M7675, remove its change
Shape, control parallel error；Next, not being in the mood for outer ring grinding machine using M1083 before, workpiece is supported using work support, passes through adjustment
The rotation of wheel control workpiece, is ground with abrasive grinding wheel, effectively controls it oval, and taper is outer vertical, circularity, roughness
Equally accurate.But in practical operation, because the wall of the bearing is thin, centerless grinder is easily difficult during artificial push, it is easy to makes
Into danger, so being changed to bear inner ring grooved railway grinding machine 3MK1310CB carries out incision mill, ensure its precision；Finally processed using roller, it
Preceding is all to use single-point finishing, but required precision is not necessary to reach very accurate in terms of corase grind, can be big using roller processing
Improve its production efficiency greatly, while what is uniquely ensured in terms of fore shaft is exactly its hold depth, so when roughly grinding ditch and locking, using roller,
The step of fore shaft size one is ground to position and channel dimensions leave surplus, follow-up fore shaft grinding can be cast out.
Refining stage
, it is necessary to which stable processing, improves its rigidity after the corase grind stage terminates.By experiment, because high precision machines people is slowed down
The collar wall of machine thin-wall bearing is thin, can be deformed upon after stable processing, and warpage is big, so according to the production of reality, needs in next step
Upper M7475 surface grinding machines, one end is held completely using its magnechuck, another side is modified with the end face of emery wheel, from
And its warpage is effectively removed, while ensure its parallel error.Next carry out flat surpassing that further to reduce its parallel using M84100
Difference, reach expected index.Subsequently cut and ground with external diameter again, respectively with fine grinding external diameter and the whole procedure of external diameter 2 of essence, it is ensured that its essence
Degree.Its ditch position is determined using sample circle, branch external diameter mill, with its raceway groove of diamond pen single-point finishing, controls its oval, circularity, with one heart
Degree and its ditch pendulum.While precision reaches, it is ensured that the finish on its surface, using superfinishing raceway groove, whole flat lapping, external diameter superfinishing is come
Control.Due to a series of chamfering for processing the small end face for causing outer ring, easily mill does not have, if chamfering is amplified in Vehicle Processing, easily leads
Cause last part chamfering level uneven, so using hard car chamfering in final step.
The technical concepts and features of embodiment of above only to illustrate the invention, its object is to allow be familiar with technique
People understands present disclosure and is carried out, and it is not intended to limit the scope of the present invention, all according to spirit of the invention
The equivalent change or modification that essence is done, it should all cover within the scope of the present invention.
Claims (8)
1. high precision machines people's reductor thin-wall bearing method for grinding, it is characterised in that：The method for grinding is included reductor
The forging blank of thin-wall bearing is processed into the workpiece blank of outer ring and inner ring respectively, is characterized in particular in：
(1) outer ring Vehicle Processing：External diameter Vehicle Processing-internal diameter Vehicle Processing-both ends of the surface Vehicle Processing-chamfering Vehicle Processing-temper of quenching；
(2) inner ring Vehicle Processing：Rough turn internal diameter, the face of car first-thin in-car external diameter, thin the second face of car-buffing internal-and external diameter-car chamfering two
Face-temper of quenching；
(3) outer ring mill processing：Roughly grind plane-corase grind outer ring-corase grind hook lock-stabilization processing-finished plane-lappingout plane-fine grinding
The whole external diameter of external diameter-essence-fine grinding raceway groove-superfinishing raceway groove-whole flat lapping-external diameter superfinishing-hard car chamfering；
(4) inner ring mill processing：Roughly grind plane-corase grind internal diameter-corase grind raceway groove-stabilization processing-finished plane-lappingout plane-fine grinding
Raceway groove-fine grinding internal diameter-superfinishing raceway groove-whole flat lapping.
2. high precision machines people reductor thin-wall bearing method for grinding according to claim 1, it is characterised in that：It is described outer
Enclose during Vehicle Processing and inner ring Vehicle Processing, add respectively according to the dimensional tolerance of workpiece, the control of the tolerance central value of form and position tolerance
Chinese musical scale cun, deviation cannot be greater than 0.01mm, and the allowance of reserved lappingout.
3. high precision machines people reductor thin-wall bearing method for grinding according to claim 1, it is characterised in that：It is described outer
In the mill process of circle and inner ring, respectively according to the dimensional tolerance of workpiece, the tolerance central value of form and position tolerance control grinding essence
Degree, deviation cannot be greater than 0.006mm, and reserved allowance.
4. high precision machines people reductor thin-wall bearing method for grinding according to claim 1, it is characterised in that：It is described outer
In circle mill process, corase grind plane carries out incision mill using bear inner ring grooved railway grinding machine 3MK1310CB, makes its accuracy rating be
0.15mm~0.20mm.
5. high precision machines people reductor thin-wall bearing method for grinding according to claim 1, it is characterised in that：It is described outer
In circle mill process, the step of fore shaft size one is ground to position and channel dimensions leave surplus by corase grind hook lock using roller processing
0.02mm-0.05mm。
6. high precision machines people reductor thin-wall bearing method for grinding according to claim 1, it is characterised in that：It is described outer
In circle mill process, finished plane uses M7475 surface grinding machines, one end is held completely using its magnechuck, with emery wheel
End face is modified to another side, and fine grinding workpiece size is scattered 4 μm, oval 2 μm, 2 μm of taper, 0.2 μm of surface roughness Ra value.
7. high precision machines people reductor thin-wall bearing method for grinding according to claim 1, it is characterised in that：It is described outer
In circle mill process, lappingout plane, respectively with fine grinding external diameter and the whole external diameter two procedures of essence, makes its essence using external diameter incision mill
Degree scope is 0.10mm~0.15mm.
8. high precision machines people reductor thin-wall bearing method for grinding according to claim 1, it is characterised in that：It is described outer
In circle mill process, fine grinding external diameter determines its ditch position using sample circle, and branch external diameter is ground, then with its raceway groove of diamond pen single-point finishing,
Control its ellipse, circularity, concentricity and ditch pendulum.
Priority Applications (1)
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| CN201710897838.9A CN107738069A (en) | 2017-09-28 | 2017-09-28 | High precision machines people's reductor thin-wall bearing method for grinding |
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| CN201710897838.9A CN107738069A (en) | 2017-09-28 | 2017-09-28 | High precision machines people's reductor thin-wall bearing method for grinding |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110293375A (en) * | 2019-07-02 | 2019-10-01 | 浙江百润轴承有限公司 | A kind of production technology of thin-wall bearing |
| CN111571132A (en) * | 2020-05-15 | 2020-08-25 | 中国航发哈尔滨轴承有限公司 | Thin-wall bearing outer ring turning method and outer ring end surface groove symmetry measuring method of thin-wall bearing |
| CN114749874A (en) * | 2022-05-20 | 2022-07-15 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Deep groove ball bearing groove machining process |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101391393A (en) * | 2008-10-30 | 2009-03-25 | 洛阳轴研科技股份有限公司 | Method and device for realizing mini-size flange bearing outer-ring inner-channel grinding process |
| CN201353727Y (en) * | 2009-02-19 | 2009-12-02 | 东风汽车公司 | Grinding wheel based on inner diameter and channel of outer ring of one-time grinding bearing |
| CN101670512A (en) * | 2008-09-09 | 2010-03-17 | 张志强 | Method for processing ultrathin-wall parts |
| CN102518668A (en) * | 2011-12-02 | 2012-06-27 | 宁波万丰轴承有限公司 | Bearing machining method |
| CN104014991A (en) * | 2014-05-23 | 2014-09-03 | 陕西法士特齿轮有限责任公司 | Method for machining thin-wall intermediate ring |
| CN104526284A (en) * | 2014-12-19 | 2015-04-22 | 常熟市常轴轴承有限公司 | Thin-walled bearing ring lathing process |
| EP2662597B1 (en) * | 2012-05-08 | 2016-07-13 | VCST Industrial Products BVBA | An idler gear assembly, as well as an internal combustion engine comprising the idler gear assembly, and a method for fixing a bushing in a through bore of a gear of the idler gear assembly |
| CN106041435A (en) * | 2016-08-18 | 2016-10-26 | 顾建祖 | Thin-walled flexible bearing machining technology |
| CN106801706A (en) * | 2017-03-02 | 2017-06-06 | 江苏万达特种轴承有限公司 | A kind of processing method of the thin-wall bearing for industrial robot |
-
2017
- 2017-09-28 CN CN201710897838.9A patent/CN107738069A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101670512A (en) * | 2008-09-09 | 2010-03-17 | 张志强 | Method for processing ultrathin-wall parts |
| CN101391393A (en) * | 2008-10-30 | 2009-03-25 | 洛阳轴研科技股份有限公司 | Method and device for realizing mini-size flange bearing outer-ring inner-channel grinding process |
| CN201353727Y (en) * | 2009-02-19 | 2009-12-02 | 东风汽车公司 | Grinding wheel based on inner diameter and channel of outer ring of one-time grinding bearing |
| CN102518668A (en) * | 2011-12-02 | 2012-06-27 | 宁波万丰轴承有限公司 | Bearing machining method |
| EP2662597B1 (en) * | 2012-05-08 | 2016-07-13 | VCST Industrial Products BVBA | An idler gear assembly, as well as an internal combustion engine comprising the idler gear assembly, and a method for fixing a bushing in a through bore of a gear of the idler gear assembly |
| CN104014991A (en) * | 2014-05-23 | 2014-09-03 | 陕西法士特齿轮有限责任公司 | Method for machining thin-wall intermediate ring |
| CN104526284A (en) * | 2014-12-19 | 2015-04-22 | 常熟市常轴轴承有限公司 | Thin-walled bearing ring lathing process |
| CN106041435A (en) * | 2016-08-18 | 2016-10-26 | 顾建祖 | Thin-walled flexible bearing machining technology |
| CN106801706A (en) * | 2017-03-02 | 2017-06-06 | 江苏万达特种轴承有限公司 | A kind of processing method of the thin-wall bearing for industrial robot |
Non-Patent Citations (1)
| Title |
|---|
| 张文: "W9Cr4V2Mo材料轴承磨加工工艺", 《轴承》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110293375A (en) * | 2019-07-02 | 2019-10-01 | 浙江百润轴承有限公司 | A kind of production technology of thin-wall bearing |
| CN111571132A (en) * | 2020-05-15 | 2020-08-25 | 中国航发哈尔滨轴承有限公司 | Thin-wall bearing outer ring turning method and outer ring end surface groove symmetry measuring method of thin-wall bearing |
| CN114749874A (en) * | 2022-05-20 | 2022-07-15 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Deep groove ball bearing groove machining process |
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