CN113146156A - Method for processing tapered roller for track traffic - Google Patents
Method for processing tapered roller for track traffic Download PDFInfo
- Publication number
- CN113146156A CN113146156A CN202110401900.7A CN202110401900A CN113146156A CN 113146156 A CN113146156 A CN 113146156A CN 202110401900 A CN202110401900 A CN 202110401900A CN 113146156 A CN113146156 A CN 113146156A
- Authority
- CN
- China
- Prior art keywords
- grinding
- roller
- face
- outer diameter
- carrying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention provides a method for processing a tapered roller for rail transit, which is characterized by comprising the following steps of: cold heading and forming a blank; heat treatment and descaling; roughly grinding the outer diameter; roughly grinding the double end faces; detecting the hardness; cutting into and grinding the outer surface; superfinishing a spherical base surface; superfinishing the outer diameter; demagnetizing, cleaning and drying; detecting the appearance; a size detection packet; and (5) cleaning, rust-proof packaging. Aiming at the defects of the prior art, the invention provides the tapered roller processing method for the track traffic, which can ensure that the dimensional accuracy and the consistency of the tapered roller are in a higher level, and can ensure that the tapered roller has higher rotation accuracy, low noise and small temperature rise when running in a bearing.
Description
Technical Field
The invention relates to a method for processing a tapered roller for rail transit.
Background
The tapered roller bearing is mainly used for bearing a radial direction and can bear combined load of a certain axial force, and is commonly used in various fields of life and work of people, compared with other fields, the tapered roller bearing used in the field of rail transit has higher requirements on the service life, high-speed performance, impact resistance, bearing capacity and the like of the tapered roller bearing, so that the tapered roller bearing applied to the field needs to have higher precision, particularly the tapered roller serving as a rolling body in the tapered roller bearing has the problems of poorer consistency of dimensional precision, incapability of meeting the requirements on the profile radian of the rolling surface and the like, and the tapered roller bearing produced in China only needs to be used for non-critical parts of trucks or passenger transportation in a small amount, while the tapered roller bearing applied to the critical parts of rail transit is very dependent on foreign import.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the tapered roller processing method for the track traffic, which can ensure that the dimensional accuracy and the consistency of the tapered roller are in a higher level, and can ensure that the tapered roller has higher rotation accuracy, low noise and small temperature rise when running in a bearing.
In order to achieve the purpose, the invention provides a tapered roller processing method for rail transit, which is characterized by comprising the following steps of: (1) cold heading and forming the roller blank; (2) carrying out heat treatment on the formed roller blank and removing an oxide skin; (3) carrying out coarse grinding processing on the outer diameter of the roller, and grinding to eliminate the outer diameter allowance of the roller; (4) carrying out coarse grinding processing on the large end face and the small end face of the roller, and grinding to eliminate the allowance of the large end face and the small end face of the roller; (5) carrying out hardness detection on the rollers, and rejecting the rollers with hardness difference exceeding 1.5 HRC; (6) carrying out plunge grinding treatment on the outer surface of the roller by using a processing grinding wheel, and grinding the large end face of the roller into a spherical end face with SR dispersion not more than 8% and end face run-out within 2 um; grinding the outer diameter of the roller into a logarithmic line-shaped contour (base number and true number) with the outer diameter roundness within 0.5um and the cone angle deviation within 1 um; grinding the joints of the large end surface and the small end surface of the roller and the outer diameter into smooth and excessive arc chamfers; (7) carrying out ultra-precision grinding on the large end face of the roller until the large end face is ground to within 5mm of SR scattering difference and the roughness of the spherical base surface is within Ra0.06um; (8) carrying out ultra-precision grinding on the outer diameter of the roller, and grinding the rolling surface of the outer diameter of the roller until the roughness is within Ra0.05um; (9) performing eddy current flaw detection, and identifying and removing rollers with defects of more than 3mm by 0.05 mm; (10) demagnetizing, cleaning and drying the roller; (11) carrying out photoelectric inspection on the roller, and removing tapered rollers with size measurement precision deviation of more than 0.05mm and defects of more than 0.15 mm; (12) and (4) carrying out size detection on the rollers, grouping according to the outer diameters and the height difference values of the rollers, and carrying out cleaning, rust prevention and packaging.
The technical scheme has the advantages that: the machining method can ensure that the dimensional accuracy and consistency of the tapered roller are in a higher level, and the tapered roller has higher rotation accuracy, low noise and small temperature rise when running in the bearing.
The small end face meets the requirement of a finished product, and the large end face is prepared for super-grinding to form a sphere base surface
The invention may further be arranged to: the processing grinding wheel comprises a grinding groove, and the grinding groove comprises a first grinding surface, a second grinding surface, a third grinding surface and a fourth grinding surface which respectively correspond to the large end face, the outer diameter, the joint of the outer diameter and the large end face and the joint of the outer diameter and the small end face.
Through further setting, in the process of cutting into and grinding the outer surface of the roller, the grinding grooves which respectively correspond to the large end face, the outer diameter, the joint of the outer diameter and the large end face and the joint of the outer diameter and the small end face are adopted, and the large end face, the outer diameter, the joint of the outer diameter and the large end face and the joint of the outer diameter and the small end face are simultaneously ground, so that the large end face, the two chamfers and the rolling surface profile of the roller can be formed at one time, the form and position tolerance precision is high, and the rotation precision is high after assembly, the noise is low and the temperature rise is small.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic view of the machining wheel and tapered roller according to the present invention;
FIG. 3 is a schematic view of a roller rolling surface profile of the present invention;
wherein: grinding the groove 1; a first ground surface 11; a second ground surface 12; a third ground surface 13; a fourth grinding surface 14.
Detailed Description
An embodiment of the tapered roller processing method for track traffic, shown in fig. 1-3, when processing a roller with a diameter of less than 15mm, comprises the following steps:
(1) adopting a American cold heading machine RH161 to cold-heading and forming the roller blank at one time;
(2) carrying out heat treatment on the formed roller blank and removing an oxide skin;
(3) the roller is subjected to through type centerless grinding by adopting a grinding machine of 3MK6040 model equipped with a CBN grinding wheel, the outer diameter of the roller is subjected to rough grinding, the outer diameter allowance of the roller is eliminated, and continuous grinding without finishing can be realized;
(4) the large end face and the small end face of the roller are subjected to coarse grinding by adopting an MK7730 type grinding machine provided with a CBN grinding wheel, the allowance of the small end face is ground, and poor weight consistency caused by the small end face between the rollers is solved; eliminating the allowance of the large end face of the roller, preparing for grinding the subsequent large end face into a ball base surface, and roughly cutting off 0.1mm from two ends;
(5) carrying out hardness detection on the rollers, and rejecting the rollers with hardness difference exceeding 1.5 HRC; (6) carrying out plunge grinding treatment on the outer surface of the roller by a Swiss TSCHHUDIN ecoLine 400 CNC plunge centerless grinder, finishing a grinding groove 1 with a first grinding surface 11, a second grinding surface 12, a third grinding surface 13 and a fourth grinding surface 14 which respectively correspond to a large end surface, an outer diameter, a joint of the outer diameter and the large end surface and a joint of the outer diameter and the small end surface by a diamond disc by a processing grinding wheel, ensuring that the large end surface, two chamfers and a rolling surface profile of the roller can be formed at one time, ensuring high form and position tolerance precision, ensuring high rotation precision, low noise and small temperature rise after assembly, grinding the large end surface of the roller into a spherical end surface with SR dispersion not more than 8 percent and end surface runout within 2um, and ensuring the consistency of the large end surface; the outer diameter of the roller is ground into a logarithmic line-shaped contour with the outer diameter roundness within 0.5um and the cone angle deviation within 1um, so that the contour consistency of the rolling surface of the tapered roller is high, the load distribution is uniform during working, no stress is concentrated, and the bearing capacity is better; the large end face and the small end face of the roller are ground into smooth and excessive arc chamfers at the joints of the outer diameters, so that the large end face, the small end face and the working face of the roller can be smoothly excessive, collision damage is less in the process of turnover and assembly, and stress concentration at the chamfers is small during heavy load and unbalance load;
(7) further performing plunge grinding on the large end face of the roller by adopting a Japanese Western STK-50FS-TZB spherical base surface superfinishing machine, ensuring the precision by utilizing a low-amplitude and high-vibration-frequency oscillation ring arranged on a grinding head of the device, and grinding the large end face to within 5mm of SR scattering difference and within Ra0.06um of roughness of the spherical base surface;
(8) carrying out ultra-precision grinding on the outer diameter of the roller by adopting a German Delenshax Infinity 1100 TR centerless through type ultra-precision machine, and carrying out ultra-precision grinding on a deteriorated layer on the outer diameter of the roller due to early grinding by utilizing an equipment ternary pneumatic oscillation mechanism and three oscillation components with different frequencies and amplitudes, so as to ensure that the convexity shape is not damaged, and grinding the rolling surface of the outer diameter of the roller until the roughness is within Ra0.05um;
(9) arranging a detection coil connected with a superfinishing machine, carrying out eddy current inspection on the tapered roller based on an electromagnetic principle, and identifying and removing the tapered roller with the defect of more than 3mm x 0.05 mm;
(10) ultrasonic rough washing, spray fine washing and high-pressure fan drying are carried out on the tapered roller, impurities and cleaning oil adhered to the surface of a product are removed, the roller surface is clean and dry, and the photoelectric inspection misjudgment rate of the appearance is reduced;
(11) performing photoelectric inspection on the roller, arranging 5 high-definition cameras, enabling 1 detection camera to face the rolling surface, performing line scanning imaging, shooting and unfolding the rolling surface and the chamfer angle at 720 degrees, and avoiding missing inspection; two cameras are respectively arranged on the large end face and the small end face, 1 short-distance shooting and 1 long-distance shooting are carried out, possible defects in the chamfer, the end face and the recess are identified, the size measurement precision is guaranteed to be 0.05mm, the defect detection precision is 0.15mm, and small flaws which are not identified by eddy current inspection, abnormal length, abnormal area of the end face and abnormal size of the chamfer are identified and eliminated;
(12) and (3) carrying out size detection grouping on the rollers, grouping the rollers with the outer diameter difference value exceeding 1 micrometer and the height difference value exceeding 3 micrometers into different series of gauge products, ensuring the rotation precision of the assembled bearing, cleaning and rust prevention the rollers again, and carrying out plastic package by adopting a plastic package jacketing machine.
The second embodiment of the tapered roller processing method for track traffic of the invention is to process a roller with a diameter of more than 15mm, and the difference from the first embodiment is the steps (1) and (12), and the specific difference is as follows:
(1) adopting a multi-station cold header 41B to cold-header the roller blank for multiple times;
(12) carry out size detection to the roller and divide into groups, with the roller that the external diameter difference exceeds 1 micron and the difference in height exceeds 3 microns and divide into different series of rule value products, guarantee assembly back bearing rotation accuracy, later carry out roller washing rust-resistant once more to the roller, by artifical plastic tubing suit, keep apart external diameter face and external diameter face, avoid in transit friction each other and collision.
The above example is only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (2)
1. A tapered roller processing method for rail transit is characterized by comprising the following steps:
(1) cold heading and forming the roller blank;
(2) carrying out heat treatment on the formed roller blank and removing an oxide skin;
(3) carrying out coarse grinding processing on the outer diameter of the roller, and grinding to eliminate the outer diameter allowance of the roller;
(4) carrying out coarse grinding processing on the large end face and the small end face of the roller, and grinding to eliminate the allowance of the large end face and the small end face of the roller;
(5) carrying out hardness detection on the rollers, and rejecting the rollers with hardness difference exceeding 1.5 HRC;
(6) carrying out plunge grinding treatment on the outer surface of the roller by using a processing grinding wheel, and grinding the large end face of the roller into a spherical end face with SR dispersion not more than 8% and end face run-out within 2 um; grinding the outer diameter of the roller into a logarithmic line-shaped profile with the outer diameter roundness within 0.5um and the cone angle deviation within 1 um; grinding the joints of the large end surface and the small end surface of the roller and the outer diameter into smooth and excessive arc chamfers;
(7) carrying out ultra-precision grinding on the large end face of the roller until the large end face is ground to within 5mm of SR scattering difference and the roughness of the spherical base surface is within Ra0.06um;
(8) carrying out ultra-precision grinding on the outer diameter of the roller, and grinding the rolling surface of the outer diameter of the roller until the roughness is within Ra0.05um;
(9) performing eddy current flaw detection, and identifying and removing rollers with defects of more than 3mm by 0.05 mm;
(10) demagnetizing, cleaning and drying the roller;
(11) carrying out photoelectric inspection on the roller, and removing tapered rollers with size measurement precision deviation of more than 0.05mm and defects of more than 0.15 mm;
(12) and (4) carrying out size detection on the rollers, grouping according to the outer diameters and the height difference values of the rollers, and carrying out cleaning, rust prevention and packaging.
2. The method for processing the tapered roller for the rail transit according to claim 1, characterized in that: the processing grinding wheel comprises a grinding groove, and the grinding groove comprises a first grinding surface, a second grinding surface, a third grinding surface and a fourth grinding surface which respectively correspond to the large end face, the outer diameter, the joint of the outer diameter and the large end face and the joint of the outer diameter and the small end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110401900.7A CN113146156A (en) | 2021-04-14 | 2021-04-14 | Method for processing tapered roller for track traffic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110401900.7A CN113146156A (en) | 2021-04-14 | 2021-04-14 | Method for processing tapered roller for track traffic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113146156A true CN113146156A (en) | 2021-07-23 |
Family
ID=76890576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110401900.7A Pending CN113146156A (en) | 2021-04-14 | 2021-04-14 | Method for processing tapered roller for track traffic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113146156A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10230439A (en) * | 1997-02-20 | 1998-09-02 | Koyo Mach Ind Co Ltd | Centerless grinding machine and centerless grinding therewith |
| CN101462245A (en) * | 2009-01-04 | 2009-06-24 | 瓦房店轴承集团有限责任公司 | Method for grinding conical bearing large cone angle roller for wind power generation |
| CN102878206A (en) * | 2012-08-22 | 2013-01-16 | 宁夏勤昌滚动轴承制造有限公司 | Bus section symmetric-convexity tapered roller and finish grinding method |
| CN103710509A (en) * | 2014-01-08 | 2014-04-09 | 江苏力星通用钢球股份有限公司 | Manufacturing method of precise tapered roller specially for high speed train unit |
| CN103821828A (en) * | 2014-02-21 | 2014-05-28 | 山东东阿钢球集团有限公司 | Production method of precise tapered roller |
| CN110394608A (en) * | 2019-08-27 | 2019-11-01 | 江苏力星通用钢球股份有限公司 | The production technology of rail traffic high-precision bearing roller |
-
2021
- 2021-04-14 CN CN202110401900.7A patent/CN113146156A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10230439A (en) * | 1997-02-20 | 1998-09-02 | Koyo Mach Ind Co Ltd | Centerless grinding machine and centerless grinding therewith |
| CN101462245A (en) * | 2009-01-04 | 2009-06-24 | 瓦房店轴承集团有限责任公司 | Method for grinding conical bearing large cone angle roller for wind power generation |
| CN102878206A (en) * | 2012-08-22 | 2013-01-16 | 宁夏勤昌滚动轴承制造有限公司 | Bus section symmetric-convexity tapered roller and finish grinding method |
| CN103710509A (en) * | 2014-01-08 | 2014-04-09 | 江苏力星通用钢球股份有限公司 | Manufacturing method of precise tapered roller specially for high speed train unit |
| CN103821828A (en) * | 2014-02-21 | 2014-05-28 | 山东东阿钢球集团有限公司 | Production method of precise tapered roller |
| CN110394608A (en) * | 2019-08-27 | 2019-11-01 | 江苏力星通用钢球股份有限公司 | The production technology of rail traffic high-precision bearing roller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Bianchi et al. | Plunge cylindrical grinding with the minimum quantity lubrication coolant technique assisted with wheel cleaning system | |
| CN105798711B (en) | A kind of bearing outer ring mill processing unit (plant) and technique | |
| Jurko et al. | Study on cone roller bearing surface roughness improvement and the effect of surface roughness on tapered roller bearing service life | |
| CN104191170A (en) | Production process for conical roller bearing | |
| de Mello et al. | Contribution to cylindrical grinding of interrupted surfaces of hardened steel with medium grit wheel | |
| CN104526546A (en) | Static and dynamic pressure bearing for main shaft of ultra-high-precision grinding wheel frame of grinding machine | |
| CN107160114A (en) | The processing method of floating disc | |
| CN103357799B (en) | Rolling manufactures the equipment of complicated shape ring-type element | |
| EP3646976A1 (en) | Ball end mill | |
| CN100354067C (en) | Method for manufacturing drum shaped roller | |
| CN103991040B (en) | A kind of processing method of engine valve shaping CBN emery wheels | |
| CN105750563A (en) | Method for enhancing hard turning circularity of thin-wall annular parts | |
| CN113146156A (en) | Method for processing tapered roller for track traffic | |
| CN210938276U (en) | Centering shaft for supporting bearing inner ring during super-finishing | |
| CN105171333A (en) | Rolling finishing processing cutter and rolling technology thereof | |
| CN105538125B (en) | A kind of Superfinishing machine supporting mechanism | |
| CN108890238A (en) | The processing technology of robot retarder rigidity flexbile gear | |
| JP2014087891A (en) | Ball end mill | |
| CN104759948A (en) | Processing technique of remanufactured crankshaft | |
| CN202656047U (en) | Device for grinding eccentric sleeve of main shaft of disk shear | |
| JP6881003B2 (en) | Polishing tools for tapered rollers, methods for polishing tapered rollers, and methods for manufacturing tapered roller bearings. | |
| CN102528581A (en) | Technology for machining micro shaft with fillet | |
| CN107891320A (en) | A kind of floating support of bearing grinder | |
| CN205325418U (en) | Super smart quick -witted supporting mechanism | |
| CN106239061A (en) | Method for fine finishing with angle raceway-lip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210723 |