CN117773496A - Bearing ring processing technology - Google Patents
Bearing ring processing technology Download PDFInfo
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- CN117773496A CN117773496A CN202311818087.9A CN202311818087A CN117773496A CN 117773496 A CN117773496 A CN 117773496A CN 202311818087 A CN202311818087 A CN 202311818087A CN 117773496 A CN117773496 A CN 117773496A
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- blank
- bearing ring
- namely
- nitriding
- temperature
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- 238000012545 processing Methods 0.000 title claims abstract description 21
- 238000005516 engineering process Methods 0.000 title claims abstract description 8
- 238000005121 nitriding Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000000137 annealing Methods 0.000 claims abstract description 13
- 238000005242 forging Methods 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 238000005496 tempering Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000010791 quenching Methods 0.000 claims description 9
- 230000000171 quenching effect Effects 0.000 claims description 9
- 238000012216 screening Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 6
- 210000001161 mammalian embryo Anatomy 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000012459 cleaning agent Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910000677 High-carbon steel Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Heat Treatment Of Articles (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a processing technology of a bearing ring, which relates to the technical field of bearing ring forging processing and comprises the following steps: selecting materials, blanking, forging, annealing, shaping, heat treatment, fine grinding, nitriding treatment and checking, wherein a plurality of nodes such as blanking, annealing, fine grinding and final step are checked and screened, unqualified products in each processing procedure are screened out, processing of subsequent procedures is avoided, resources are saved, nitriding treatment is carried out in the bearing ring processing process, and the corrosion resistance of the bearing ring is greatly improved on the premise of ensuring the original performance of the bearing ring.
Description
Technical Field
The invention relates to the technical field of bearing ring forging processing, in particular to a processing technology of a bearing ring.
Background
The bearing is an important part in modern mechanical equipment, and has the main functions of supporting a mechanical rotating body, reducing the friction coefficient in the motion process and ensuring the rotation precision. The bearing typically includes a bearing ring, a cage, and rollers. The bearing ring is an annular part of a radial rolling bearing with one or more raceways, and generally comprises an inner ring and an outer ring, wherein the inner ring is used for being matched with a shaft and rotating together with the shaft, the outer ring is used for being matched with a bearing seat to play a supporting role, a forged piece finished product of the bearing ring is generally obtained by adopting high-carbon steel through forging and deforming a blank of multiple passes step by step.
Rust prevention is an indispensable procedure in the production and use of the bearing ring, and the inner wall of the bearing ring is less in rust due to long-term rotation, but the upper side wall and the lower side wall of the bearing ring are more exposed when in use, and the production environments are different and the rust condition is more. The rust-proof mode adopted at present for the bearing ring is generally to smear rust-proof agent or rust-proof oil, when the bearing is used, maintenance is carried out regularly, once the rust-proof agent is washed away by liquid, or rust can appear when the maintenance is not in time, and normal use can be influenced under the condition of serious rust, which is a problem.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a processing technology of a bearing ring, which is used for nitriding treatment in the processing process of the bearing ring, so as to enhance the corrosion resistance of the bearing ring and improve the existing problems.
The invention is realized by the following technical scheme:
the processing technology of the bearing ring is characterized by comprising the following steps of:
s1, selecting materials, detecting the integrity of the surface of a bar, and picking out qualified bars;
s2, blanking, namely cutting the qualified bar stock through a machine tool to obtain a blank with a required size, screening the blank again, and picking out the qualified blank
S3, forging, namely conveying the qualified blank to a forging machine, and sequentially performing upsetting, extrusion, punching, connecting skin separation and reaming operations to prepare a blank;
s4, annealing, namely performing spheroidizing annealing operation after cooling the blank, wherein the annealing temperature range is 700-760 ℃;
s5, shaping, namely conveying the annealed blank to a lathe for turning, and turning a chamfer, a slope or a groove;
s6, performing heat treatment, and performing quenching and high-temperature tempering on the turned blank;
s7, fine grinding, namely checking the heat-treated blank, screening out the blank with overlarge deformation and flaws, fine grinding the qualified blank, and demagnetizing;
s8, nitriding treatment, namely performing final nitriding treatment on the accurately ground blank;
s9, checking, and finally checking to obtain a finished product.
Further preferably, the nitriding treatment in s8 is ion nitriding.
Further preferably, the step of ion nitriding in s8 includes the steps of: cleaning, namely cleaning the blank by adopting an ultrasonic cleaner and a water-based cleaning agent, airing the blank, and then conveying the blank into an ion nitriding furnace; nitriding, namely pumping the ion nitriding furnace to below 200pa, heating the blank in the furnace in a glow mode, heating to 540 ℃, introducing nitrogen and hydrogen, preserving heat for 10 hours, and ending nitriding; slowly cooling, namely, slowly cooling the blank in a furnace in a glow way, continuously introducing nitrogen and hydrogen, setting the temperature of the ion nitriding furnace to 500 ℃, slowly cooling, and maintaining for 30min after cooling to 500 ℃; cooling, discharging, closing a nitriding furnace power supply and external auxiliary heat, setting the nitriding furnace temperature to 160 ℃, starting an external air cooler, protecting by nitrogen, cooling to 150 ℃ by air cooling, discharging, and naturally cooling to room temperature.
Further preferably, in the step s6 of heat treatment, the quenching temperature is 950-1000 ℃, the tempering temperature is greater than the temperature of nitriding treatment in the step s8, and the tempering temperature is 550-560 ℃.
Further optimally, in the step s9, the deformation degree, the defect and the appearance color of the blank are checked, and the unqualified blank is screened out.
And (3) further optimally, performing secondary polishing treatment on the embryo which is screened out in the step (s 9) and has unqualified appearance color, and obtaining a finished product.
The beneficial effects of the invention are as follows:
according to the invention, the blank is subjected to ion nitriding treatment in the processing process of the bearing ring, and the corrosion resistance of the bearing ring is greatly improved on the premise of ensuring the original performance of the bearing ring.
In the whole processing process, a plurality of nodes such as blanking, annealing, fine grinding and final step are subjected to inspection and screening, defective products in each processing procedure are screened out, the processing of subsequent procedures is avoided, and resources are saved.
The process adopts forging processing and forming, can eliminate the internal defects of the metal of the blank, improves the metal structure, ensures that the metal streamline is distributed reasonably, and has better metal compactness.
Detailed Description
In order to clearly illustrate the technical characteristics of the scheme, the invention is explained in detail by the following specific embodiments. In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "left", "right", "front", "rear", "inner", "outer", etc. are based on the directions or positional relationships shown, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The invention provides a processing technology of a bearing ring, which is characterized by comprising the following steps:
s1, selecting a high-carbon steel bar, firstly detecting the integrity of the surface of the bar, and selecting a qualified bar for processing.
S2, blanking, namely cutting the qualified bar stock into blanks with required sizes through an automatic machine tool, screening the blanks again, and picking out the qualified blanks. The machine tool can have the problems of errors, deformation and the like during cutting and blanking, the cut blanks are screened, the blanks with large size errors are screened out, and the subsequent processing is avoided, so that the resources are wasted.
And S3, forging, namely heating the qualified blank to 1100-1200 ℃ by adopting an intermediate frequency furnace, feeding the blank into a forging machine, and sequentially performing upsetting, extrusion, punching, connecting skin separation and reaming operations to prepare a blank.
S4, annealing, namely after the blank is cooled, checking the blank, removing the defective products, and then performing spheroidizing annealing operation on the qualified blank, wherein the annealing temperature range is 700-760 ℃. The spheroidizing annealing is more suitable for high-carbon steel, and aims to reduce the hardness of blanks and facilitate the next shaping operation.
S5, shaping, namely conveying the annealed blanks to an automatic lathe for turning, and turning chamfer angles, slope surfaces or grooves required by different bearing rings.
S6, performing heat treatment, namely performing quenching and high-temperature tempering operation on the turned blank, wherein the quenching temperature is 950-1000 ℃, the tempering temperature is 550-560 ℃, the hardness of the blank is improved through quenching, the residual stress of the blank is eliminated through high-temperature tempering, the structure and the size are stabilized, and the precision is ensured.
S7, fine grinding, namely, re-checking the heat-treated embryo, screening out the embryo with oversized deformation and flaws, fine grinding, polishing and deburring the qualified embryo, and then carrying out demagnetizing treatment to enable the embryo to basically accord with a final finished product.
S8, nitriding treatment, namely performing final nitriding treatment on the accurately ground blank by adopting ion nitriding, so that the blank has excellent corrosion resistance. Wherein the ion nitriding treatment comprises the following steps:
cleaning, namely cleaning the blank by adopting an ultrasonic cleaner and a water-based cleaning agent, airing the blank, and then conveying the blank into an ion nitriding furnace;
nitriding, namely pumping the ion nitriding furnace to below 200pa, heating the blank in the furnace in a glow mode, heating to 540 ℃, introducing nitrogen and hydrogen, preserving heat for 10 hours, and ending nitriding;
slowly cooling, namely, slowly cooling the blank in a furnace in a glow way, continuously introducing nitrogen and hydrogen, setting the temperature of the ion nitriding furnace to 500 ℃, slowly cooling, and maintaining for 30min after cooling to 500 ℃;
cooling, discharging, closing a nitriding furnace power supply and external auxiliary heat, setting the nitriding furnace temperature to 160 ℃, starting an external air cooler, protecting by nitrogen, cooling to 150 ℃ by air cooling, discharging, and naturally cooling to room temperature.
S9, checking, namely, checking the deformation degree, the defect and the appearance color of the blank, and screening out unqualified blanks to obtain a finished product. And (3) carrying out secondary polishing treatment on the screened blank with unqualified appearance color only to obtain a finished product as well because dark spots possibly exist during nitriding treatment.
As a preferred embodiment, it is particularly noted that in the heat treatment step s6, the quenching temperature and tempering temperature are higher than the nitriding temperature of the nitriding treatment in step s8, so that the nitriding treatment has little or no influence on the heat treatment effect in the foregoing step, and the corrosion resistance can be greatly improved under the premise of ensuring the performance of the bearing ring.
The present invention is not described in detail in the present application, and is well known to those skilled in the art. Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (6)
1. The processing technology of the bearing ring is characterized by comprising the following steps of:
s1, selecting materials, detecting the integrity of the surface of a bar, and picking out qualified bars;
s2, blanking, namely cutting the qualified bar stock through a machine tool to obtain a blank with a required size, screening the blank again, and picking out the qualified blank
S3, forging, namely conveying the qualified blank to a forging machine, and sequentially performing upsetting, extrusion, punching, connecting skin separation and reaming operations to prepare a blank;
s4, annealing, namely performing spheroidizing annealing operation after cooling the blank, wherein the annealing temperature range is 700-760 ℃;
s5, shaping, namely conveying the annealed blank to a lathe for turning, and turning a chamfer, a slope or a groove;
s6, performing heat treatment, and performing quenching and high-temperature tempering on the turned blank;
s7, fine grinding, namely checking the heat-treated blank, screening out the blank with overlarge deformation and flaws, fine grinding the qualified blank, and demagnetizing;
s8, nitriding treatment, namely performing final nitriding treatment on the accurately ground blank;
s9, checking, and finally checking to obtain a finished product.
2. The process for machining a bearing ring according to claim 1, characterized in that: the nitriding treatment in s8 adopts ion nitriding.
3. The process for machining a bearing ring according to claim 2, wherein the ion nitriding treatment in s8 comprises the steps of:
cleaning, namely cleaning the blank by adopting an ultrasonic cleaner and a water-based cleaning agent, airing the blank, and then conveying the blank into an ion nitriding furnace;
nitriding, namely pumping the ion nitriding furnace to below 200pa, heating the blank in the furnace in a glow mode, heating to 540 ℃, introducing nitrogen and hydrogen, preserving heat for 10 hours, and ending nitriding;
slowly cooling, namely, slowly cooling the blank in a furnace in a glow way, continuously introducing nitrogen and hydrogen, setting the temperature of the ion nitriding furnace to 500 ℃, slowly cooling, and maintaining for 30min after cooling to 500 ℃;
cooling, discharging, closing a nitriding furnace power supply and external auxiliary heat, setting the nitriding furnace temperature to 160 ℃, starting an external air cooler, protecting by nitrogen, cooling to 150 ℃ by air cooling, discharging, and naturally cooling to room temperature.
4. The process for machining a bearing ring according to claim 1, characterized in that: in the step of heat treatment of s6, the quenching temperature is 950-1000 ℃, the quenching temperature and the tempering temperature are higher than the temperature of nitriding treatment in the step s8, and the tempering temperature is 550-560 ℃.
5. The process for machining a bearing ring according to claim 1, characterized in that: and step s9, checking the deformation degree, the defect and the appearance color of the blank, and screening out unqualified blanks.
6. The process for machining a bearing ring according to claim 5, wherein: and (3) performing secondary polishing treatment on the embryo with unqualified appearance color screened in the step (s 9) to obtain a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311818087.9A CN117773496A (en) | 2023-12-27 | 2023-12-27 | Bearing ring processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311818087.9A CN117773496A (en) | 2023-12-27 | 2023-12-27 | Bearing ring processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117773496A true CN117773496A (en) | 2024-03-29 |
Family
ID=90390353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311818087.9A Pending CN117773496A (en) | 2023-12-27 | 2023-12-27 | Bearing ring processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117773496A (en) |
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2023
- 2023-12-27 CN CN202311818087.9A patent/CN117773496A/en active Pending
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