CN101343681A - Steel sphere surface peening technique - Google Patents
Steel sphere surface peening technique Download PDFInfo
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- CN101343681A CN101343681A CNA2008101245797A CN200810124579A CN101343681A CN 101343681 A CN101343681 A CN 101343681A CN A2008101245797 A CNA2008101245797 A CN A2008101245797A CN 200810124579 A CN200810124579 A CN 200810124579A CN 101343681 A CN101343681 A CN 101343681A
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Abstract
The invention discloses a steel ball surface strengthening process. The steel ball surface strengthening process is characterized in that austenite left on a steel ball is irregularly stricken at a certain speed through a roller after the steel ball is treated through quenching and tempering, and the austenite left on the steel ball is induced into martensite by phase transformation under the pressure effect of striking. The surface hardness of the steel ball is enhanced due to the change, and the surface compressing stress is increased, so as to provide conditions for meeting the requirements of surface roughness. So the processing quality of the steel ball is enhanced, and especially enhancing the dynamic performance of the steel ball is an effective way for producing steel balls with low noise.
Description
Technical field:
The present invention relates to a kind of steel sphere surface peening technique, particularly a kind of higher steel sphere surface peening technique of steel ball surface hardness that forms by non-directional, irregular bump.
Background technology:
In common steel ball treating processes, just directly for early grind, steel ball surface hardness is inhomogeneous and on the low side after the hard grind, very easily causes surfacing inhomogeneous when receiving the extruding of cast iron plate and grinding in the early grind process, and precision improves difficulty.
Summary of the invention
The present invention relates to a kind of higher steel sphere surface peening technique of steel ball surface hardness that forms by non-directional, irregular bump.
In order to solve above technical problem, a kind of steel sphere surface peening technique of the present invention, its innovative point is: described steel sphere surface peening technique step is as follows: a, the steel ball after the thermal treatment is carried out hard grind; B, the steel ball after the hard grind flowed into c in the cylinder of steel sphere surface peening machine by guide path, the cylinder of steel sphere surface peening machine is quickened to roll, steel ball is made irregular, nondirectional repeatedly percussion movement repeatedly in cylinder, after the d bump finishes, slow down drum rotational speed, derive steel ball by ball guilding trough.
Described thermal treatment steel ball quenching hardness should be controlled between the HRC64-65.5.
Described thermal treatment steel ball temper number is between HRC61-63.
Drum speed among the described step c is 700-1000r/min.
Cylinder rotation time 50-120min among the described step c.
Hardness behind the described steel sphere surface peening is HRC62.5-65.0.
Drum speed in the described steps d is for transferring to 11-16r/min.
The advantage of above technology is: 1, between hard grind and early grind two-step, increase steel sphere surface peening technique, steel ball is after Overheating Treatment in the steel sphere surface peening technique process, its tissue inter-variable is the very high martensite of hardness, but still there is residual austenite in the top layer at steel ball, austenitic hardness is lower than martensite again, so the phenomenon of soft or hard inequality just occurred at steel ball surface, amount of grinding in lappingout processing is also just inconsistent, the speed that martensite is cut is lower than austenite, therefore increase the factor that steel ball surface produces irregular ripple, brought influence for the dynamic property of steel ball.The reinforcement essence of steel ball is exactly the mutual bump by steel ball, make steel ball top layer residual austenite under pressure, bring out and become martensite mutually, the steel ball surface hardness improves 1.2～3.5HRC behind the working hardening, improved the situation of steel ball surface hardness inequality, therefore in follow-up buffing, hard grind and lappingout processing, ball surface each several part all can obtain uniform micro cutting, not only reduced the percent ripple of steel ball, also being beneficial to the geometric accuracy of improving the steel ball lappingout, is one of important process that reduces steel ball vibration values, raising steel ball dynamic property so steel ball is strengthened.
2, after the steel ball hard grind, in the reinforcement machine, by strengthening the cylinder rotation steel ball is quickened, making steel ball produce irregular, nondirectional several in drum clashes into repeatedly, the energy that utilizes bump to produce makes steel ball surface that macroscopical elastic deformation take place, microcosmic generation plastic deformation, improve the steel ball surface stress, realize the purpose that steel ball surface hardness improves.
3, steel sphere surface peening technique can improve steel ball surface hardness, helps improving steel ball lappingout surface quality, reduces bear vibration, improves the bearing dynamic property.By research trial, the steel ball life-span after the reinforcement can be improved 1～2 times.After surface hardening was handled, hardness value had increased, and the hardened layer hardness ratio do not have micro-crack more again and exist, and this has just strengthened steel ball surface plasticity_resistant deformation and supporting capacity, thereby has improved the fatigue lifetime of steel ball.
4, steel ball is one of strength member of ball bearing, good and bad running accuracy, dynamic property and the work-ing life that directly influences bearing of steel ball quality, adopt surface Hardening Treatment technology, utilize metallic substance to make the characteristic of hardened layer, improve steel ball surface hardness, promote the transformation of residual austenite, increase bearing stress, for the requirement of satisfying surfaceness provides condition.Therefore, improve the processing quality of steel ball, the dynamic property that especially improves steel ball is the effective way of producing the low noise steel ball.
Description of drawings
Fig. 1 is the process flow diagram of the whole process of steel ball making of the present invention.
Fig. 2 is the process flow diagram of steel sphere surface peening technique of the present invention.
Embodiment
As shown in Figure 1, the steel ball whole process of making is: choose starting material, gently draw, cold pier is pressed, eliminate stress, photosphere, buffing, thermal treatment, hard grind, surface strengthening, early grind, cleaning polishing are deoiled, outward appearance is cleaned in flaw detection, twice of lappingout, finished product, oiling is packed.Except surface intensified technique, other technologies are conventional process in the above-mentioned steps, in this not repeat specification of event.
As shown in Figure 2, the idiographic flow of above-mentioned surface intensified technique is: at first, a, the steel ball after the thermal treatment is carried out hard grind; B, flow into the steel ball after the hard grind in the cylinder of steel sphere surface peening press by guide path; C, the cylinder of steel sphere surface peening press is quickened to roll, steel ball is made irregular, nondirectional repeatedly percussion movement repeatedly in cylinder, and general collision time is 50～120, and steel ball surface hardness reaches HRC62.5～65 o'clock, stops bump; After bump finishes, slow down drum rotational speed, derive steel ball, slow down drum rotational speed, derive steel ball, steel ball is sent into down technology get final product by ball guilding trough to 5-10 rev/min by ball guilding trough.
Below compare at ball hardness and uniformity of hardness after the steel ball intensive treatment:
Steel ball is strengthened back hardness and uniformity of hardness contrast
By contrast as seen, the steel ball after strengthening:
One, steel ball is by strengthening, its surface hardness improves 1～3HRC, to the homogeneity of hardness, poor (scattered error in the ball) of 3 minimax measured values on same steel ball should not surpass 0.5HRC, and the maximum value of measured value between ball and the ball (scattered error between ball) is should exceed 1HRC not.Described three indexs have all obtained control effectively behind steel sphere surface peening.
Two, steel ball has improved surperficial hardening layer after strengthening, anti-collision of steel ball surface and friction, capability have been strengthened, can reduce the vibration values of steel ball, improved the wear resistance of steel ball, prolonged the work-ing life of steel ball, also correspondingly having improved the work-ing life of ball bearing, had good social benefit, also is one of measure of satisfying the long life bearing customer requirements.
Claims (9)
1, a kind of steel sphere surface peening technique is characterized in that: described steel sphere surface peening technique step is as follows: a, the steel ball after the thermal treatment is carried out hard grind; B, flow into the steel ball after the hard grind in the cylinder of steel sphere surface peening machine by guide path; C, the cylinder of steel sphere surface peening machine is quickened to roll, steel ball is made irregular, nondirectional repeatedly percussion movement repeatedly in cylinder; After d, bump finish, slow down drum rotational speed, derive steel ball by ball guilding trough.
2, a kind of steel sphere surface peening technique according to claim 1 is characterized in that: described thermal treatment steel ball quenching temperature: 850 ± 5 ℃.
3, a kind of steel sphere surface peening technique according to claim 1 is characterized in that: described thermal treatment steel ball quenching hardness is HRC64～65.5.
4, a kind of steel sphere surface peening technique according to claim 1 is characterized in that: 170 ℃-180 ℃ of described thermal treatment steel ball tempering temperatures.
5, a kind of steel sphere surface peening technique according to claim 1 is characterized in that: described thermal treatment steel ball temper number is between HRC60.5-63.
6, a kind of steel sphere surface peening technique according to claim 1 is characterized in that: the drum speed among the described step c is 700-1000r/min.
7, a kind of steel sphere surface peening technique according to claim 1 is characterized in that: the cylinder rotation time 50-120min among the described step c.
8, a kind of steel sphere surface peening technique according to claim 1 is characterized in that: the hardness behind the described steel sphere surface peening is HRC62.5-65.0.
9, a kind of steel sphere surface peening technique according to claim 1, it is characterized in that: the drum speed in the described steps d is for transferring to 11-16r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101245797A CN101343681A (en) | 2008-08-26 | 2008-08-26 | Steel sphere surface peening technique |
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| CNA2008101245797A CN101343681A (en) | 2008-08-26 | 2008-08-26 | Steel sphere surface peening technique |
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| CN101343681A true CN101343681A (en) | 2009-01-14 |
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| CNA2008101245797A Pending CN101343681A (en) | 2008-08-26 | 2008-08-26 | Steel sphere surface peening technique |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031355A (en) * | 2010-12-24 | 2011-04-27 | 淄博大亚金属科技股份有限公司 | Device and method for reinforcing metal abrasive |
| CN102252024A (en) * | 2011-02-14 | 2011-11-23 | 江苏力星通用钢球股份有限公司 | Steel ball special for third-age hub bearing for luxury cars |
| CN102848157A (en) * | 2012-09-24 | 2013-01-02 | 椿中岛机械(太仓)有限公司 | Production process of bearing steel balls with long service life and used for constant velocity joint (CVJ) of automobile |
| CN102848155A (en) * | 2012-09-24 | 2013-01-02 | 椿中岛机械(太仓)有限公司 | Production process of bearing steel balls of high speed spinner |
| CN102865301A (en) * | 2012-03-13 | 2013-01-09 | 江苏力星通用钢球股份有限公司 | Steel ball special for large-sized offshore wind turbine generator bearing and manufacturing process of steel ball |
| CN103372758A (en) * | 2012-04-12 | 2013-10-30 | 安顺市虹翼特种钢球制造有限公司 | Processing method for 3Cr13 material high-precision steel balls |
| CN103614525A (en) * | 2013-11-22 | 2014-03-05 | 湖南大学 | Preheating-based controllable grinding reinforcing 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 |
| CN106011416A (en) * | 2016-06-05 | 2016-10-12 | 无锡市飞云球业有限公司 | Surface strengthening process for mute bearing steel balls |
| CN106475746A (en) * | 2016-12-09 | 2017-03-08 | 安顺市虹翼特种钢球制造有限公司 | A kind of processing method of steel ball with high precision |
| CN107186447A (en) * | 2017-07-15 | 2017-09-22 | 芜湖市宇恒特种钢球有限公司 | A kind of processing method of bearing steel ball |
| CN110475886A (en) * | 2017-10-31 | 2019-11-19 | 日本制铁株式会社 | The nickeliferous steel plate of low temperature and the low temperature tank for having used the nickeliferous steel plate of low temperature |
| CN114574800A (en) * | 2022-02-17 | 2022-06-03 | 合肥力和机械有限公司 | Micro steel ball and surface carburizing and hardening coordination treatment process |
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2008
- 2008-08-26 CN CNA2008101245797A patent/CN101343681A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031355A (en) * | 2010-12-24 | 2011-04-27 | 淄博大亚金属科技股份有限公司 | Device and method for reinforcing metal abrasive |
| CN102031355B (en) * | 2010-12-24 | 2012-07-11 | 淄博大亚金属科技股份有限公司 | Device and method for reinforcing metal abrasive |
| CN102252024A (en) * | 2011-02-14 | 2011-11-23 | 江苏力星通用钢球股份有限公司 | Steel ball special for third-age hub bearing for luxury cars |
| CN102865301A (en) * | 2012-03-13 | 2013-01-09 | 江苏力星通用钢球股份有限公司 | Steel ball special for large-sized offshore wind turbine generator bearing and manufacturing process of steel ball |
| CN102865301B (en) * | 2012-03-13 | 2014-09-24 | 江苏力星通用钢球股份有限公司 | Steel ball special for large-sized offshore wind turbine generator bearing and manufacturing process of steel ball |
| CN103372758A (en) * | 2012-04-12 | 2013-10-30 | 安顺市虹翼特种钢球制造有限公司 | Processing method for 3Cr13 material high-precision steel balls |
| CN102848157A (en) * | 2012-09-24 | 2013-01-02 | 椿中岛机械(太仓)有限公司 | Production process of bearing steel balls with long service life and used for constant velocity joint (CVJ) of automobile |
| CN102848155A (en) * | 2012-09-24 | 2013-01-02 | 椿中岛机械(太仓)有限公司 | Production process of bearing steel balls of high speed spinner |
| CN102848155B (en) * | 2012-09-24 | 2015-03-18 | 椿中岛机械(太仓)有限公司 | Production process of bearing steel balls of high speed spinner |
| CN102848157B (en) * | 2012-09-24 | 2015-03-18 | 椿中岛机械(太仓)有限公司 | Production process of bearing steel balls with long service life and used for constant velocity joint (CVJ) of automobile |
| CN103614525B (en) * | 2013-11-22 | 2015-02-25 | 湖南大学 | Preheating-based controllable grinding reinforcing method |
| CN103614525A (en) * | 2013-11-22 | 2014-03-05 | 湖南大学 | Preheating-based controllable grinding reinforcing 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 |
| CN106011416A (en) * | 2016-06-05 | 2016-10-12 | 无锡市飞云球业有限公司 | Surface strengthening process for mute bearing steel balls |
| CN106475746A (en) * | 2016-12-09 | 2017-03-08 | 安顺市虹翼特种钢球制造有限公司 | A kind of processing method of steel ball with high precision |
| CN107186447A (en) * | 2017-07-15 | 2017-09-22 | 芜湖市宇恒特种钢球有限公司 | A kind of processing method of bearing steel ball |
| CN110475886A (en) * | 2017-10-31 | 2019-11-19 | 日本制铁株式会社 | The nickeliferous steel plate of low temperature and the low temperature tank for having used the nickeliferous steel plate of low temperature |
| CN110475886B (en) * | 2017-10-31 | 2021-06-15 | 日本制铁株式会社 | Nickel-containing steel sheet for low temperature use and low temperature use tank using same |
| CN114574800A (en) * | 2022-02-17 | 2022-06-03 | 合肥力和机械有限公司 | Micro steel ball and surface carburizing and hardening coordination treatment process |
| CN114574800B (en) * | 2022-02-17 | 2023-12-01 | 合肥力和机械有限公司 | Miniature steel ball and surface carburization and hardening coordination treatment process |
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Open date: 20090114 |