CN105750563A - Method for enhancing hard turning circularity of thin-wall annular parts - Google Patents
Method for enhancing hard turning circularity of thin-wall annular parts Download PDFInfo
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- CN105750563A CN105750563A CN201610127229.0A CN201610127229A CN105750563A CN 105750563 A CN105750563 A CN 105750563A CN 201610127229 A CN201610127229 A CN 201610127229A CN 105750563 A CN105750563 A CN 105750563A
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- thin
- circular ring
- wall circular
- ring parts
- clamping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2215/00—Details of workpieces
- B23B2215/12—Bearing races
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a method for enhancing the turning circularity of cylindrical surfaces of thin-wall annular parts by controlling flatness of end faces of the thin-wall annular parts and flatness of work faces of clamping positioning pieces of the thin-wall annular parts. The method is characterized in that a positioning manner adopts the combination of end planar location and cylindrical surface dial gauge centering, and a clamping manner adopts the axial clamping of a magnetic chuck or a vacuum chuck. Compared with a manner with a three-jaw chuck for positioning and clamping, the method for positioning, clamping and processing disclosed by the invention can be used for processing the external cylindrical surface, the internal cylindrical surface, the end surfaces and annular channels in the internal and external cylindrical surfaces of the thin-wall annular parts with one clamping and positioning, effectively preventing radial deformation of the thin-wall annular parts during the clamping and processing process, and remarkably improving the turning circularity of the thin-wall annular parts, thereby providing an effective method for ultraprecise turning of thin-wall annular parts such as bearing rings.
Description
Technical field
The present invention relates to the technical field of skilled worker's circle ring parts, the method being specifically related to improve thin-wall circular ring parts hard turning circularity.
Background technology
Bearing is a kind of basic components being widely used in machinery, electronic product.It is generally made up of outer ring, inner ring, rolling element and retainer.Bearing outer ring and inner ring are referred to as bearing ring, and they are typical thin-wall circular ring parts, and its processing technique generally adopted is: blank forming (forging or pipe fitting) → annealing → turning or cold rolling → quenching, tempering → grinding → superfinishing are ground.Wherein grinding generally comprises end face mill, peripheral milling or inner circle mill, raceway centreless grinding.Multiple tracks grinding process cost is high, efficiency is low, and process parameter control is improper easily causes lasso grinding burn, produces damaged surface layer, bearing life is caused and has a strong impact on.Along with the high speed development of numerical control machine tool technique, cutting-tool engineering, development in recent years goes out a kind of hard turning technology being likely to and substituting Grinding Technology as bearing ring fine-processing technique.Namely hard turning technology adopts special tool cutters such as () PCBN, pottery, diamond to process the technology of quenched components consisting on high main axis stiffness, smooth turning lathe, it have high accuracy, efficiently, the feature of economic, cleaning.Under suitable machining condition and technique, hard turning technology can obtain and grinding technique quite even better geometric accuracy and surface quality, including surface roughness, dimensional accuracy, form accuracy, positional precision, hardness distribution, metallographic structure, residual stress state etc., especially the surface through hard turning processing is residual compressive stress state, and the anti-fatigue life improving part is played an important role.The accurate means of a hard-turning process of bearing ring is generally adopted clamping with three-jaw chuck location, for bearing inner race, first position with external diameter and end face, hard car internal diameter and other end, then the internal diameter crossed with hard car and end face location, accurate hard car external diameter, end face and raceway groove, bearing ring is thin-wall circular ring parts, and poor rigidity very easily produces bigger radial deformation because of clamping power, cutting force in clamping process, working angles, have a strong impact on machining accuracy, and then affect bearing assembly precision and service life.In this processing technique, each lasso, through twice Set and Positioning, introduces position error, meanwhile, uses clamping with three-jaw chuck, and after processing, triangle deviation from circular from profile easily occurs in raceway groove, affects machining accuracy.
To sum up, due to bearing ring insufficient rigidity, existing hard Vehicle Processing technique exists than more prominent technology, quality problems in installation way, processing technique.Therefore, research, the processing technique that invention bearing ring is new, overcome existing hard Vehicle Processing technique to need the problem that multiple clamping, clamping and machining deformation are bigger, it is achieved the high accuracy manufacture of bearing, it appears very urgent and necessary.
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of method improving thin-wall circular ring parts hard turning circularity, adopt magnetic force chuck or vacuum cup that one end of thin-wall circular ring parts is axially clamped, and described thin-wall circular ring parts adopts the location mode that end plane location is combined with face of cylinder amesdial Middle Phase to position；
Wherein, the flatness in the Set and Positioning face of described magnetic force chuck or vacuum cup and described thin-wall circular lopps feature contacts is less than or equal to 3 μm, and the flatness of the location end face that described thin-wall circular ring parts contacts with described magnetic force chuck or vacuum cup is less than or equal to 1 μm.
It is preferred that described thin-wall circular ring parts clamping, location concretely comprise the following steps:
(1) one end of described thin-wall circular ring parts is affixed on the Set and Positioning face of described magnetic force chuck or vacuum cup, and makes described thin-wall circular ring parts coaxial with described magnetic force chuck or vacuum cup；
(2) described magnetic force chuck or vacuum cup apply clamping force to a certain extent, now rap described thin-wall circular ring parts, its can on the Set and Positioning face of magnetic force chuck or vacuum cup small slip but will not drop under gravity；
(3) gauge stand of described amesdial is fixed on lathe tool tower so that the indicator of described amesdial is beaten on the periphery of described thin-wall circular ring parts, stirs lathe chuck and make it rotate, observe the change of amesdial meter pointer；Rap the inner headed face of described thin-wall circular ring parts simultaneously, until when stirring lathe spindle, till the change of amesdial meter pointer is minimum；
(4) then, the clamping force of described magnetic force chuck or vacuum cup is promoted to maximum, described thin-wall circular ring parts is carried out hard Vehicle Processing.
It is preferred that described thin-wall circular ring parts is only clamped by one-time positioning, realize the processing of annular channel on the external cylindrical surface of thin-wall circular ring parts, inner cylinder face, end face and inside and outside circle cylinder.
It is preferred that described thin-wall circular ring parts first carries out quenching before clamping, location, temper so that the hardness of described thin-wall circular ring parts is more than 45HRC.
It is preferred that the hardness of described thin-wall circular ring parts is 58HRC-62HRC.
It is preferred that by the end of described thin-wall circular ring parts is carried out grinding before hard Vehicle Processing, thus ensureing the flatness of end.
It is preferred that the cutter for described thin-wall circular ring parts carries out hard Vehicle Processing adopts PCBN coated chip.
Due to the fact that the above technical scheme of employing, so as to compared with prior art, have the following advantages that and good effect:
(1) method of raising thin-wall circular lopps part end face turning circularity provided by the invention, by controlling the flatness of thin-wall circular lopps part end face flatness and Set and Positioning part (magnetic force chuck or vacuum cup) work surface thereof, thus substantially increasing the degree of accuracy of thin-wall circular ring parts clamping and positioning, thus improve the circularity of thin-wall circular ring parts, it is achieved high accuracy manufactures；
(2) present invention adopts amesdial to position the mode of clamping with magnetic force chuck or vacuum cup, compared with the mode adopting the clamping of scroll chuck location in prior art, the location clamping of the present invention and processing method, can be positioned by clamped one time, can be realized as the external cylindrical surface of thin-wall circular ring parts, inner cylinder face, end face, the processing of the annular channel etc. on inside and outside circle cylinder, can effectively prevent the radial deformation of thin-wall circular ring parts in clamping and the course of processing, significantly improve the turnery processing circularity of thin-wall circular ring parts, a kind of effective ways are provided for thin-wall circular ring parts ultra-precise cutting processing such as bearing rings；
Accompanying drawing explanation
In conjunction with accompanying drawing, by hereafter state detailed description, the above-mentioned and other feature and advantage of the present invention can be more clearly understood that, wherein:
Fig. 1 is single-row angular contact bearing inner ring clamping centering schematic diagram in the embodiment of the present invention one；
Fig. 2 is single-row angular contact bearing inner ring each surface definition schematic diagram in the embodiment of the present invention one；
Fig. 3 is each surface definition schematic diagram of magnetic force chuck or vacuum cup in the present invention；
Fig. 4 is the schematic diagram of each critical component of amesdial in the present invention；
Fig. 5 is single-row angular contact bearing outer ring clamping centering schematic diagram in the embodiment of the present invention two；
Fig. 6 is each surface definition in single-row angular contact bearing outer ring schematic diagram in the embodiment of the present invention two.
Detailed description of the invention
Referring to the accompanying drawing illustrating the embodiment of the present invention, the present invention is described in more detail.But, the present invention can realize in many different forms, and should not be construed as by restriction of the embodiment of proposition at this.On the contrary, it is proposed to these embodiments are to reach fully and complete disclosure, and make those skilled in the art understand the scope of the present invention completely.In these accompanying drawings, for clarity sake, it is possible to be exaggerated size and the relative size in layer and region.
The invention provides a kind of method improving thin-wall circular lopps part end face turning circularity, in order to solve thin-wall circular ring parts problem such as changeableness, low precision when hard Vehicle Processing in prior art；Wherein, thin-wall circular ring parts concretely bearing inner race, bearing outer ring etc.; when not limiting to and bearing inner race, bearing outer ring, and the material of thin-wall circular ring parts can adopt bearing steel material, engineering ceramics, engineering plastics, composite etc., is not limited as herein.
The method of raising thin-wall circular ring parts hard turning circularity provided by the invention, adopt magnetic force chuck or vacuum cup that one end of thin-wall circular ring parts is axially clamped, and thin-wall circular ring parts adopts the location mode that end plane location is combined with face of cylinder amesdial Middle Phase to position；Wherein, the flatness in the Set and Positioning face of magnetic force chuck or vacuum cup and thin-wall circular lopps feature contacts is less than or equal to 3 μm, and the flatness of the location end face that thin-wall circular ring parts contacts with magnetic force chuck or vacuum cup is less than or equal to 1 μm.
Concrete, preparation one has the thin-wall circular ring parts of allowance; thin-wall circular ring parts is first quenched by thin-wall circular ring parts before carrying out hard Vehicle Processing, tempering heat treatment; thus the hardness improving thin-wall circular ring parts is larger than 45HRC; preferred so that the hardness of thin-wall circular ring parts reaches 58HRC-62HRC.
Carry out quenching, thin-wall circular ring parts after temper, then its one or both ends are carried out ground, to improve the flatness of the end of thin-wall circular ring parts, consequently facilitating the clamping of follow-up thin-wall circular ring parts and location.Preferably, the flatness of the thin-wall circular lopps part end face after grinding is less than 1 μm, and plane error profile is uniformly distributed, without bigger raised or sunken portion.
Thin-wall circular ring parts, after cross grinding, is clamped location, in order to follow-up carry out hard Vehicle Processing, and clamping, location specifically include following steps:
(1) one end of thin-wall circular ring parts is affixed on the Set and Positioning face of magnetic force chuck or vacuum cup, and makes thin-wall circular ring parts coaxial with magnetic force chuck or vacuum cup；Wherein, the flatness in the Set and Positioning face of magnetic force chuck or vacuum cup and thin-wall circular lopps feature contacts is less than or equal to 3 μm, in order to thin-wall circular ring parts fits tightly with magnetic force chuck or vacuum cup, to ensure the degree of accuracy of follow-up location；
(2) magnetic force chuck or vacuum cup apply clamping force to a certain extent, now rap thin-wall circular ring parts, it is ensured that its can on the Set and Positioning face of magnetic force chuck or vacuum cup small slip but will not drop under gravity；
(3) gauge stand of amesdial is fixed on the lathe tool tower for hard Vehicle Processing, and makes the indicator of amesdial vertically beat on the periphery of thin-wall circular ring parts, stir lathe chuck and make it rotate, observe the change of amesdial meter pointer；Adopt plastic hammer to rap the inner headed face of thin-wall circular ring parts simultaneously, until when stirring lathe chuck, till the change of amesdial meter pointer is minimum；
(4) then, the clamping force of card magnetic force chuck or vacuum cup is promoted to maximum, completes clamping, follow-up again thin-wall circular ring parts is carried out hard Vehicle Processing.
The method of raising thin-wall circular lopps part end face turning circularity provided by the invention, by improving the flatness of thin-wall circular lopps part end face flatness and Set and Positioning part (magnetic force chuck or vacuum cup) work surface thereof, thus substantially increasing the degree of accuracy of thin-wall circular ring parts clamping and positioning, thus improve the circularity of thin-wall circular ring parts, it is achieved high accuracy manufactures.And, the present invention adopts amesdial to position the mode of clamping with magnetic force chuck or vacuum cup, compared with the mode adopting the clamping of scroll chuck location in prior art, the location clamping of the present invention and processing method, can be positioned by clamped one time, can be realized as the external cylindrical surface of thin-wall circular ring parts, inner cylinder face, end face, the processing of the annular channel etc. on inside and outside circle cylinder, can effectively prevent the radial deformation of thin-wall circular ring parts in clamping and the course of processing, significantly improve the turnery processing circularity of thin-wall circular ring parts, a kind of effective ways are provided for thin-wall circular ring parts ultra-precise cutting processing such as bearing rings.
Apply in specific embodiment with regard to the present invention below, in conjunction with accompanying drawing, be further described:
Embodiment 1
With reference to Fig. 1-4, in the present embodiment, thin-wall circular ring parts is the inner ring 3 of single-row angular contact ball bearing, including location end face 31, periphery 32, outer raceway groove or outer raceway 33, non-locating end face 34, inner headed face 35；Fixture is magnetic force chuck 1, including Set and Positioning face 11, periphery 12, the surface 13. being connected with lathe main spindle nose
The processing of the inner ring 3 of single-row angular contact ball bearing comprises the following steps:
1, preparation has the inner ring 3 of allowance.
2, undertaken quenching and tempering heat treatment by the inner ring 3 having allowance.
Wherein, single-row angular contact ball bearing inner ring 3 material adopts GCr15 bearing steel, and normal quenching, tempering heat treatment, after heat treatment, single-row angular contact ball bearing inner ring 3 hardness should be higher than that 45HRC, it is preferable that 58HRC-62HRC.
3, the end face 31,34 of grinding inner ring 3, it is ensured that its flatness is less than or equal to 1 μm
Wherein, cutter can adopt PCBN coated chip.
If Set and Positioning face 11 flatness of 4 magnetic force chuck 1 is poor, turning Set and Positioning face 11 is answered to ensure its flatness (flatness is less than or equal to 3 μm) within the specific limits.
5, the inner ring 3 after cross grinding is carried out accurate hard Vehicle Processing.
Concrete, the location end face 31 of inner ring 3 is affixed on the Set and Positioning face 11 of magnetic force chuck 1, makes the axis of inner ring 3 and the axis coaxle of magnetic force chuck 1 as far as possible.Apply magnetic force chuck 1 clamping force to a certain extent, now rap inner ring 3, its can on the Set and Positioning face 11 of magnetic force chuck 1 small slip but will not drop under gravity.Being fixed on lathe tool tower by amesdial 2,23 dozens, indicator, on the periphery 32 of inner ring 3, is stirred lathe chuck and is made it rotate, observe amesdial meter pointer 22 to change, plastic hammer is used to rap the inner headed face 35 of inner ring 3, until when stirring lathe chuck, amesdial meter pointer 22 changes minimum；Then, magnetic force chuck 1 clamping force is promoted to maximum, starts processing inner headed face 35, end face 34, periphery 32 and raceway groove 33 respectively.Completion of processing, reduces to smaller value by magnetic force chuck 1 clamping force, takes off the inner ring 3 of accurate hard Vehicle Processing gently.
Embodiment 2
With reference to Fig. 3-6, in the present embodiment, thin-wall circular ring parts is the outer ring 4 of single-row angular contact ball bearing, including location end face 41, periphery 42, non-locating end face 43, inner headed face 44, interior raceway or interior raceway groove 45；Fixture is magnetic force chuck 1, including Set and Positioning face 11, periphery 12, the surface 13 being connected with lathe main spindle nose.
The processing of the outer ring 4 of single-row angular contact ball bearing comprises the following steps:
1, preparation has the outer ring 4 of allowance.
2, undertaken quenching and tempering heat treatment by the outer ring 4 having allowance.
Wherein, the material of outer ring 4 adopts GCr15 bearing steel, and normal quenching, tempering heat treatment, after heat treatment, the hardness of outer ring 4 should be higher than that 45HRC, it is preferable that 58-62HRC.
3, the end face 41,43 of grinding outer ring 4, it is ensured that its flatness is less than or equal to 1 μm.
Wherein, cutter adopts PCBN coated chip.
If Set and Positioning face 11 flatness of 4 magnetic force chuck 1 is poor, turning Set and Positioning face 11 is answered to ensure its flatness (flatness is less than or equal to 3 μm) within the specific limits.
5, the outer ring 4 after cross grinding is carried out accurate hard Vehicle Processing.
Concrete, the location end face 41 of outer ring 4 is affixed on the Set and Positioning face 11 of magnetic force chuck 1, makes the axis of outer ring 4 and the axis coaxle of magnetic force chuck 1 as far as possible.Applying the clamping force of magnetic force chuck 1 to a certain extent, now rap outer ring 4, it can slide on the Set and Positioning face 11 of magnetic force chuck 1 but will not drop under action of gravity again；Amesdial 2 is fixed on lathe tool tower, 23 dozens, indicator is on the periphery 42 of outer ring 4, stirring lathe chuck makes it rotate, observe amesdial meter pointer 22 to change, use plastic hammer to rap the inner headed face 44 of outer ring 4, until when stirring lathe chuck, amesdial meter pointer 22 changes minimum, then, magnetic force chuck 1 clamping force is promoted to maximum, starts processing excircles face 42, end face 43, inner headed face 44 and raceway groove 45 respectively.Completion of processing, reduces to smaller value by magnetic force chuck 1 clamping force, takes off the outer ring 4 of accurate hard Vehicle Processing gently.
Those skilled in the art should be understood that the present invention can be implemented without departing from the spirit or scope of itself with other concrete forms many.Although having been described for the case study on implementation of the present invention, it should be understood that the present invention should not be limited to these embodiments, those skilled in the art can change and modifications as made within the spirit and scope of the present invention that appended claims defines.
Claims (7)
1. the method improving thin-wall circular ring parts hard turning circularity, it is characterized in that, adopt magnetic force chuck or vacuum cup that one end of thin-wall circular ring parts is axially clamped, and described thin-wall circular ring parts adopts the location mode that end plane location is combined with face of cylinder amesdial Middle Phase to position；
Wherein, the flatness in the Set and Positioning face of described magnetic force chuck or vacuum cup and described thin-wall circular lopps feature contacts is less than or equal to 3 μm, and the flatness of the location end face that described thin-wall circular ring parts contacts with described magnetic force chuck or vacuum cup is less than or equal to 1 μm.
2. the method for raising thin-wall circular ring parts hard turning circularity according to claim 1, it is characterised in that described thin-wall circular ring parts clamping, location concretely comprise the following steps:
(1) one end of described thin-wall circular ring parts is affixed on the Set and Positioning face of described magnetic force chuck or vacuum cup, and makes described thin-wall circular ring parts coaxial with described magnetic force chuck or vacuum cup；
(2) described magnetic force chuck or vacuum cup apply clamping force to a certain extent, now rap described thin-wall circular ring parts, its can on the Set and Positioning face of magnetic force chuck or vacuum cup small slip but will not drop under gravity；
(3) gauge stand of described amesdial is fixed on lathe tool tower so that the indicator of described amesdial is beaten on the periphery of described thin-wall circular ring parts, stirs lathe chuck and make it rotate, observe the change of amesdial meter pointer；Rap the inner headed face of described thin-wall circular ring parts simultaneously, until when stirring lathe spindle, till the change of amesdial meter pointer is minimum；
(4) then, the clamping force of described magnetic force chuck or vacuum cup is promoted to maximum, described thin-wall circular ring parts is carried out hard Vehicle Processing.
3. the method for raising thin-wall circular ring parts hard turning circularity according to claim 1, it is characterized in that, described thin-wall circular ring parts is only clamped by one-time positioning, realizes the processing of annular channel on the external cylindrical surface of thin-wall circular ring parts, inner cylinder face, end face and inside and outside circle cylinder.
4. the method for raising thin-wall circular ring parts hard turning circularity according to claim 1, it is characterised in that described thin-wall circular ring parts first carries out quenching before clamping, location, temper so that the hardness of described thin-wall circular ring parts is more than 45HRC.
5. the method for raising thin-wall circular ring parts hard turning circularity according to claim 3, it is characterised in that the hardness of described thin-wall circular ring parts is 58HRC-62HRC.
6. the method for raising thin-wall circular ring parts hard turning circularity according to claim 1, it is characterised in that by the end of described thin-wall circular ring parts is carried out grinding before hard Vehicle Processing, thus ensureing the flatness of end.
7. the method for raising thin-wall circular ring parts hard turning circularity according to claim 1, it is characterised in that the cutter for described thin-wall circular ring parts carries out hard Vehicle Processing adopts PCBN coated chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610127229.0A CN105750563A (en) | 2016-03-07 | 2016-03-07 | Method for enhancing hard turning circularity of thin-wall annular parts |
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| CN201610127229.0A CN105750563A (en) | 2016-03-07 | 2016-03-07 | Method for enhancing hard turning circularity of thin-wall annular parts |
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| CN201610127229.0A Pending CN105750563A (en) | 2016-03-07 | 2016-03-07 | Method for enhancing hard turning circularity of thin-wall annular parts |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107309440A (en) * | 2017-06-29 | 2017-11-03 | 中国航发哈尔滨轴承有限公司 | A kind of thin-wall bearing ferrule lathe in machining method |
| WO2018040391A1 (en) * | 2016-08-30 | 2018-03-08 | 上海斐赛轴承科技有限公司 | Crossed roller bearing with convex raceway and manufacturing method thereof |
| CN110666595A (en) * | 2019-08-27 | 2020-01-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Precision machining method for inner hole of thin-wall part |
| CN111872634A (en) * | 2020-07-20 | 2020-11-03 | 广州大学 | Strengthening rib final cutting machining method for thin-wall bearing inner ring |
| CN114273872A (en) * | 2021-12-28 | 2022-04-05 | 张家港市弘扬金属制品制造有限公司 | Machining method of thin-wall bearing ring forging |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018040391A1 (en) * | 2016-08-30 | 2018-03-08 | 上海斐赛轴承科技有限公司 | Crossed roller bearing with convex raceway and manufacturing method thereof |
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| CN110666595A (en) * | 2019-08-27 | 2020-01-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Precision machining method for inner hole of thin-wall part |
| CN111872634A (en) * | 2020-07-20 | 2020-11-03 | 广州大学 | Strengthening rib final cutting machining method for thin-wall bearing inner ring |
| CN114273872A (en) * | 2021-12-28 | 2022-04-05 | 张家港市弘扬金属制品制造有限公司 | Machining method of thin-wall bearing ring forging |
| CN114273872B (en) * | 2021-12-28 | 2024-01-23 | 张家港市弘扬金属制品制造有限公司 | Machining method of thin-wall bearing ring forging |
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Application publication date: 20160713 |
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