CN103406819B - Bearing seal groove forming plunge-cut grinding method - Google Patents
Bearing seal groove forming plunge-cut grinding method Download PDFInfo
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- CN103406819B CN103406819B CN201310373699.1A CN201310373699A CN103406819B CN 103406819 B CN103406819 B CN 103406819B CN 201310373699 A CN201310373699 A CN 201310373699A CN 103406819 B CN103406819 B CN 103406819B
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- seal groove
- grinding
- bearing
- inner ring
- surplus
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Abstract
The invention discloses a bearing seal groove forming plunge-cut grinding method. The method includes the steps: firstly, machining a seal groove of an inner ring of a bearing into a preform and reserving margins; secondly, grinding the seal groove and a roller path of the inner ring by a dressed grinding wheel; thirdly, finishing grinding. The margins in the seal groove of the inner ring are gradual margins. When the seal groove with the design of the gradual margins is used, the margins grinded by the grinding wheel are gradually increased, impact force on the grinding wheel is small, abrasion of the grinding wheel is effectively reduced, so that grinding accuracy of the seal groove is improved, the service life of the grinding wheel is prolonged, two slopes of the seal groove are designed into the gradual margins, two sides of a grinding edge of the grinding wheel uniformly bear axial force when the seal groove is grinded, collapse of the grinding edge of the grinding wheel is avoided, and the method can also avoid the problem that a margin at the bottom of a groove frequently cannot be grinded due to the defect of collapse of the grinding edge of the grinding wheel when the seal groove is grinded.
Description
Technical field
The present invention relates to the processing method of bearing, refer in particular to bearing seal Slot shaping crush grinding method.
Background technology
The quality of bearing seal performance directly affects service life and the reliability of bearing.The principal element affecting bearing seal performance has: the making quality of correct design, sealing ring, the crudy of seal groove, selection proper lubrication fat etc.
The crudy of sealed bearing inner ring, outer ring seal groove, directly affects the sealing property of bearing.Bearing outer ring seal groove crudy is bad, causes the slip (slipping ring) of the relative bearing outer ring of sealing ring, even comes off in seal groove, and namely usually alleged " falling lid " phenomenon, can make sealed bearing lose sealing property; Bearing inner race seal groove crudy is bad, and sealing property can be caused to decline, therefore, and must the strict crudy controlling bearing seal groove.How improving sealing property is the common problem that faces of bearing industry and difficult point.
At present, most of Vehicle Processing producer adopts YT15, W2 tool steel as lathe processing tool bit.Utilize wire cutting machine tool that Tool in Cutting sword is cut into the shape of needs.
Shortcoming: wearability is poor, need frequent sharpening, dimensional accuracy is lower.The shape of Tool in Cutting sword is comparatively difficult to ensure card, being frequently installed after each sharpening, tool setting, and add the regulation time of lathe, the positional precision uniformity of lathe tool is poor, causes the dimensional uniformity of turning seal groove to be also difficult to ensure.In addition, the molybdenum filament precision of wire cutting machine tool is mostly at about 0.2mm, Tool in Cutting sword surface roughness value is higher, the roughness on processing seal groove main contact slope is poor, heat treatment rear surface oil mark, carbonization skin etc. not easily process in addition, when finally causing bearing working, sealing lip wearing and tearing are very fast, and sealing effectiveness is poor.
In recent years, along with a large amount of uses of Vehicle Processing producer automatic lathe line, and client's improving constantly bearing seal performance requirement, the application of shaping blades is more and more extensive.
The material of shaping blades mostly adopts ceramic material.
Shortcoming: cost is higher, is generally the 6-8 of YT15, W2 tool steel doubly.Toughness is low, and impact resistance is poor.
Except above-mentioned reason, because most producers lathe rigidity is poor, precision is lower, Vehicle Processing seal groove size and shape are comparatively difficult to ensure card, size scattered error is larger, after heat treatment deformation is difficult to control, heat treatment in addition, the main contact surface oil mark of seal groove, oxide skin are difficult to process, the factors such as roughness value is lower, cause seal groove difficult quality guarantee.
In addition, in current industry, very good method be there is no to the measurement of seal groove size and form accuracy, the producer that quality control is strict, most arrangement special messenger examines entirely to seal groove, also can only for indivedual size, and the index such as form accuracy, roughness is inspected by random samples, which increases the difficulty and cost that control seal groove quality.
Summary of the invention
The technical problem that one, will solve
The object of the invention is for the problems referred to above existing for prior art, spy provides the bearing seal Slot shaping crush grinding that a kind of efficiency is high, precision is high and cost is low method.
Two, technical scheme
For solving the problems of the technologies described above, bearing seal Slot shaping crush grinding method of the present invention, wherein, comprises the following steps:
Step one: the seal groove of bearing inner race is processed into preformed, and leaves surplus;
Step 2: grinding is carried out to the seal groove of inner ring and raceway with the emery wheel after finishing;
Step 3: complete grinding;
Surplus in above-mentioned inner ring seal groove is gradual change type surplus.
As optimization, above-mentioned gradual change type surplus refers to that surplus in seal groove is from progressive additive at the bottom of sealing notch to seal groove.
As optimization, the domatic roughness value of main contact of above-mentioned seal groove is Ra=0.63 ~ 0.8 μm.
As optimization, the outer shape of above-mentioned emery wheel and seal groove and raceway Corresponding matching.
Three, beneficial effect of the present invention
The present invention adopts the seal groove of gradual change type surplus design compared with the seal groove of generic homogeneous surplus design, as shown in Figure 2, when adopting the seal groove of even surplus design to carry out grinding, when with identical grinding parameter grinding, along with the continuous feeding of emery wheel, emery wheel impulsive force is comparatively large, and abrasion of grinding wheel amount is larger, the finishing number of times needed also correspondingly increases, and the indexs such as the life-span of the seal groove precision that grinding goes out, grinding efficiency, emery wheel are not as the seal groove of gradual change type surplus design.When adopting the seal groove of gradual change type surplus design, the surplus that grinding-wheel grinder reams is for increase gradually, and suffered by emery wheel, impulsive force is less, significantly reduces the wearing and tearing of emery wheel, thus improves the grinding accuracy of seal groove, extends the life-span of emery wheel.In addition, seal groove two is domatic is designed to gradual change type surplus, when can ensure grinding seal groove, axial force is evenly born in wheel grinding sword both sides, avoid bursting apart of wheel grinding sword, when also can avoid seal groove grinding, the trench bottom often occurred because wheel grinding sword collapses defect has more the problem that one piece of surplus can not grind away, as shown in Figure 6.
Accompanying drawing explanation
Fig. 1 is gradual change type surplus design schematic diagram of the present invention;
Fig. 2 is existing common seal groove surplus design schematic diagram;
Fig. 3 is bearing seal structure schematic diagram of the present invention;
Fig. 4 is the fragmentary cross-sectional view of bearing outer ring seal groove;
Fig. 5 is the fragmentary cross-sectional view of bearing inner race seal groove;
Fig. 6 is the schematic diagram of grinding allowance in seal groove.
In figure, 1 is outer ring, and 2 is inner ring, and 3 is seal groove, and 4 is surplus.
Detailed description of the invention
Below in conjunction with accompanying drawing, bearing seal Slot shaping crush grinding method of the present invention is described further:
Embodiment one: as shown in Figure 1, the shaping crush grinding method of bearing seal groove 3 of the present invention, wherein, comprises the following steps:
Step one: the seal groove 3 of bearing inner race 2 is processed into preformed, and leaves surplus 4;
Step 2: utilize diamond roller that the emery wheel after finishing is carried out grinding to the seal groove 3 of inner ring 2 and raceway;
Step 3: complete grinding;
Surplus 4 in above-mentioned inner ring 2 seal groove 3 is gradual change type surplus 4; Above-mentioned gradual change type surplus 4 refers to that surplus 4 in seal groove 3 is from seal groove 3 mouthfuls to seal groove 3 end progressive additive; The outer shape of above-mentioned emery wheel and seal groove 3 and raceway Corresponding matching.
When employing gradual change type surplus 4 designs and carries out grinding to the inner ring 2 of bearing, have higher efficiency, as long as Vehicle Processing goes out preformed, the surplus of reserved gradual change type, just can utilize emery wheel accurately to grind the shape of needs; And precision improves greatly, seal groove 3 position equidimension accuracy tolerance is no more than 0.01mm, compared with the 0.05mm that existing Vehicle Processing dimensional tolerance is minimum, have significant raising, in addition, the domatic roughness value of main contact of above-mentioned seal groove 3 is Ra=0.63 ~ 0.8 μm, to go out a lot compared to minimum about 1.63 μm high of existing Vehicle Processing, further, by the shaping crush grinding method of the present embodiment bearing seal groove 3, can not be used in and the process such as oil mark, carbonization skin is heat-treated to its surface; Can be carried out the finishing of at least one ten thousand times to emery wheel by diamond roller, each grinding work piece 8 ~ 10, percent defective is very low in addition, and cost performance is apparently higher than the Vehicle Processing using cutter.
As shown in Figure 6, during the seal groove 3 adopting gradual change type surplus 4 to design, the surplus 4 that grinding-wheel grinder reams is for increase gradually, and suffered by emery wheel, impulsive force is less, significantly reduces the wearing and tearing of emery wheel, thus improves the grinding accuracy of seal groove 3, extends the life-span of emery wheel.In addition, seal groove 3 two is domatic is designed to gradual change type surplus 4, when can ensure grinding seal groove 3, axial force is evenly born in wheel grinding sword both sides, avoid bursting apart of wheel grinding sword, when also can avoid seal groove 3 grinding, the trench bottom often occurred because wheel grinding sword collapses defect has more the problem that one piece of surplus 4 can not grind away.
As shown in Fig. 3 to 5, when sealing ring presses fit into bearing seal groove 3, should ensure that outer ring 1 interference meets designing requirement.
1. seal groove 3 size in outer ring 1 is on the impact of bearing seal performance:
1.1 outer rings 1 seal groove 3 bottom width a (comprising a1 and a2) are too small, and sealing ring will be caused to press-fit difficulty, and distortion is large, also have influence on the main contact lip of sealing and contact the domatic magnitude of interference with inner ring 2 is main, thus affect the sealing property of bearing; Seal groove 3 bottom width a is excessive in outer ring 1, and sealing ring will be caused to contact interference deficiency with outer ring 1 seal groove 3, easily produces " slipping ring " (namely slide in the relative outer ring 1 of sealing ring), causes bearing operation hourglass fat, affect bearing seal performance;
B (comprising b1 and b2) is put as excessive in 1.2 seal groove 3 slot, outer rings 1, dynamic seal ring will be with closer to inner ring 2 seal groove 3, strengthen causing the main magnitude of interference contacting slope of sealing ring main contact lip and inner ring 2, when causing bearing operation, moment of friction increases, sealing lip rubber wearing and tearing aggravation, finally affects the sealing property of bearing.B is put as too small in seal groove 3 slot, outer ring 1, and sealing ring will be made away from inner ring 2 seal groove 3, by causing sealing ring main contact lip diminish with the main magnitude of interference contacting slope of inner ring 2 or do not have interference, causes leakage fat during bearing operation.
1.3 seal groove 3 end, outer ring 1 footpath sizes are on the impact of bearing seal performance:
Seal groove 3 end, outer ring 1 footpath dimension D 1 is too small, and sealing ring will be caused to press-fit difficulty, and distortion is large, also has influence on the main contact lip of sealing and contacts the domatic magnitude of interference with inner ring 2 is main.Seal groove 3 end, outer ring 1 footpath dimension D 1 is excessive, and sealing ring will be caused to contact interference deficiency with outer ring 1 seal groove 3, easily produces " slipping ring ", causes bearing operation hourglass fat, affect bearing seal performance;
2. inner ring 2 seal groove 3 size is on the impact of bearing seal performance:
It is too small that a (comprising a1 and a2) is put in 2.1 inner ring 2 seal groove 3 slots, by causing sealing ring main contact lip and inner ring 2, main to contact domatic interference quantitative change large, when causing bearing operation, moment of friction increases, sealing lip rubber wearing and tearing aggravation, thus affects the sealing property of bearing.It is excessive that a is put in inner ring 2 seal groove 3 slot, and by causing, sealing ring main contact lip and inner ring 2 are main to be contacted the domatic magnitude of interference and diminish or do not have interference, causes leakage fat during bearing operation;
Excessive, the too small size all affecting the sealing ring main contact lip magnitude of interference of the main contact slope angle α of 2.2 inner ring 2 seal groove 3, its impact is shown in above-mentioned;
When the domatic roughness value of the 2.3 main contact of inner ring 2 seal groove 3 is higher, by the wearing and tearing of sealing lip in aggravation bearing operation process, moment of friction increases, and the power consumption of machine strengthens, and temperature rise increases, and finally affects the sealing property of bearing.
The explanation of symbol for dimensioning in figure:
The sealing slot bottom width of a1, a2-outer ring, inner ring
The seal groove slot of b1, b2-outer ring, inner ring is put
The main contact angle of slope of α-inner ring seal groove
β-outer ring seal groove bore angle of slope
Footpath at the bottom of the seal groove of D1, d2-outer ring, inner ring
The seal groove bore of D2, d1-outer ring, inner ring
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. a bearing seal Slot shaping crush grinding method, is characterized in that: comprise the following steps:
Step one: the seal groove of bearing inner race is processed into preformed, and leaves surplus;
Step 2: grinding is carried out to the seal groove of inner ring and raceway with the emery wheel after finishing;
Step 3: complete grinding;
Surplus in described inner ring seal groove is gradual change type surplus, and described gradual change type surplus refers to that surplus in seal groove is from progressive additive at the bottom of sealing notch to seal groove, the outer shape of described emery wheel and seal groove and raceway Corresponding matching.
2. bearing seal Slot shaping crush grinding method according to claim 1, is characterized in that: the domatic roughness value of main contact of described seal groove is Ra=0.63 ~ 0.8 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373699.1A CN103406819B (en) | 2013-08-23 | 2013-08-23 | Bearing seal groove forming plunge-cut grinding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373699.1A CN103406819B (en) | 2013-08-23 | 2013-08-23 | Bearing seal groove forming plunge-cut grinding method |
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| CN103406819A CN103406819A (en) | 2013-11-27 |
| CN103406819B true CN103406819B (en) | 2015-05-06 |
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| CN201310373699.1A Expired - Fee Related CN103406819B (en) | 2013-08-23 | 2013-08-23 | Bearing seal groove forming plunge-cut grinding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104493670B (en) * | 2014-12-22 | 2017-09-05 | 溧阳市超强链条制造有限公司 | A kind of method for grinding of chain head riveter roll groove profile |
Citations (12)
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|---|---|---|---|---|
| FR1516435A (en) * | 1966-03-11 | 1968-03-08 | Norton Abrasives Ltd | Grinding improvements |
| JPH0384218A (en) * | 1989-08-29 | 1991-04-09 | Nippon Seiko Kk | Sealed rolling bearing |
| US5063714A (en) * | 1988-04-07 | 1991-11-12 | Firma Ernst Winter & Sohn (Gmbh & Co.) | Grinding wheel for deep grinding |
| JPH06246546A (en) * | 1993-02-24 | 1994-09-06 | Ntn Corp | Manufacture of bearing ring for rolling bearing |
| GB2346574B (en) * | 1999-02-03 | 2001-09-19 | Unova Uk Ltd | Angle head grinding method and apparatus |
| CN2652568Y (en) * | 2003-11-01 | 2004-11-03 | 洛阳轴承集团有限公司 | Circular hard alloy tooth cutter |
| JP2005299730A (en) * | 2004-04-07 | 2005-10-27 | Nsk Ltd | Manufacturing method for raceway ring and sealed ball bearing |
| JP2005324313A (en) * | 2004-04-12 | 2005-11-24 | Toyoda Mach Works Ltd | Grinding method of workpiece |
| JP2007239919A (en) * | 2006-03-09 | 2007-09-20 | Ntn Corp | Sealing type rolling bearing and its manufacturing process |
| CN101495269A (en) * | 2006-08-01 | 2009-07-29 | 埃尔温容克尔机械制造有限公司 | Method of grinding an indexable insert and grinding wheel for carrying out the grinding method |
| DE50313400D1 (en) * | 2002-08-05 | 2011-02-17 | Junker Erwin Maschf Gmbh | METHOD AND SYSTEM FOR GRINDING A ROLLING SYMMETRIC MACHINE COMPONENT PROVIDED BY A LENGTH DRILLING |
| CN103203666A (en) * | 2013-04-12 | 2013-07-17 | 上海交通大学 | Efficient grinding method for tipping tooth tops of side-edge-free roughing broaches |
-
2013
- 2013-08-23 CN CN201310373699.1A patent/CN103406819B/en not_active Expired - Fee Related
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1516435A (en) * | 1966-03-11 | 1968-03-08 | Norton Abrasives Ltd | Grinding improvements |
| US5063714A (en) * | 1988-04-07 | 1991-11-12 | Firma Ernst Winter & Sohn (Gmbh & Co.) | Grinding wheel for deep grinding |
| JPH0384218A (en) * | 1989-08-29 | 1991-04-09 | Nippon Seiko Kk | Sealed rolling bearing |
| JPH06246546A (en) * | 1993-02-24 | 1994-09-06 | Ntn Corp | Manufacture of bearing ring for rolling bearing |
| GB2346574B (en) * | 1999-02-03 | 2001-09-19 | Unova Uk Ltd | Angle head grinding method and apparatus |
| DE50313400D1 (en) * | 2002-08-05 | 2011-02-17 | Junker Erwin Maschf Gmbh | METHOD AND SYSTEM FOR GRINDING A ROLLING SYMMETRIC MACHINE COMPONENT PROVIDED BY A LENGTH DRILLING |
| CN2652568Y (en) * | 2003-11-01 | 2004-11-03 | 洛阳轴承集团有限公司 | Circular hard alloy tooth cutter |
| JP2005299730A (en) * | 2004-04-07 | 2005-10-27 | Nsk Ltd | Manufacturing method for raceway ring and sealed ball bearing |
| JP2005324313A (en) * | 2004-04-12 | 2005-11-24 | Toyoda Mach Works Ltd | Grinding method of workpiece |
| JP2007239919A (en) * | 2006-03-09 | 2007-09-20 | Ntn Corp | Sealing type rolling bearing and its manufacturing process |
| CN101495269A (en) * | 2006-08-01 | 2009-07-29 | 埃尔温容克尔机械制造有限公司 | Method of grinding an indexable insert and grinding wheel for carrying out the grinding method |
| CN103203666A (en) * | 2013-04-12 | 2013-07-17 | 上海交通大学 | Efficient grinding method for tipping tooth tops of side-edge-free roughing broaches |
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| CN103406819A (en) | 2013-11-27 |
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Granted publication date: 20150506 Termination date: 20160823 |