CN103231202A - Bearing raceway ultrasonic reinforcing method and device - Google Patents
Bearing raceway ultrasonic reinforcing method and device Download PDFInfo
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- CN103231202A CN103231202A CN2013101610429A CN201310161042A CN103231202A CN 103231202 A CN103231202 A CN 103231202A CN 2013101610429 A CN2013101610429 A CN 2013101610429A CN 201310161042 A CN201310161042 A CN 201310161042A CN 103231202 A CN103231202 A CN 103231202A
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Abstract
Provided are a bearing raceway ultrasonic reinforcing method and device. The bearing raceway ultrasonic reinforcing method includes that before a needed raceway surface is processed on a bearing body of a bearing and after the whole bearing body is subjected to thermal treatment and semi-accurate grinding but before accurate grinding, the raceway surface of the bearing body is subjected to at least one ultrasonic reinforcing continuously, the bearing body rotates along the axis of the bearing body during ultrasonic reinforcing, and a tool bit of an ultrasonic tool constantly keeps normal contact with the raceway surface and exerts constant normal force. The bearing raceway ultrasonic reinforcing device comprises a connection seat, a turntable, a connection support, a cylinder and the ultrasonic tool, wherein the turntable is arranged on the connection seat, the connection support is connected with the rotating part of the turntable, the cylinder is fixedly arranged at one end of the connection support, and the ultrasonic tool is arranged on a guide rail of the connection support and is connected with a piston rod of the cylinder. By adopting the bearing raceway ultrasonic reinforcing method, all positions on the raceway surface can be uniformly reinforced, non-uniform reinforcing is avoided, and fatigue life of bearings can be prolonged by more than 10 times.
Description
Technical field
The present invention relates to a kind ofly carry out method and the device that ultrasonic vibration is strengthened for the inside and outside raceway to bearing, belong to raceway reinforcement technique field.
Background technology
The intensity of raceway has fundamental influence to the fatigue life of bearing, and the processing technology of bearing is generally: bearing is contoured to drawing requirement size (allowance for finish is stayed at the raceway position) → nitrogenize → half correct grinding → correct grinding → grinding.The technology that improves raceway intensity adopts heat-treating methods mostly at present, as CN2007100408275 disclosed " improving bearing wearability and the surface treatment method of fatigue life ", be that bearing ring is placed in the vapor phase growing apparatus, use physical gas-phase deposite method, be target with titanium and graphite, form a kind of DLC film at the lasso part.The CN20071004057553 disclosed composite heat treating method of bearing life " improve " puts into the nitriding furnace tempering of quenching with dried bearing ring.Though the workpiece after the heat treatment has improved the fatigue life of raceway, these all are the conventional methods that improves bearing intensity for special industries such as aero-engines, and increase rate is all very limited, process complexity, cost height.
Ultrasonic vibration is carried out on the metal works surface, can effectively improve surface strength, reduce roughness, as CN2010105265706 disclosed " a kind of super finely finishing method of race way " and CN201010526566X disclosed " a kind of convexity method for trimming of raceway "." a kind of super finely finishing method of race way " is to adopt numerical control device that its surperficial technology of race way hammering is repaired, at first Vehicle Processing goes out required roller surface heat treatment, after bearing body is arranged on the numerical control device with finish turning device and calibration devices, to the raceway finish turning of going ahead of the rest, with the vibratory tool head of calibration devices race way is carried out the hammering of ultra-high frequency again." a kind of convexity method for trimming of raceway " is to adopt the ultrasonic wave numerical control device that race way is carried out with the technology of ultra-high frequency hammering, repair race way behind the type is convexity by the straight line raceway logarithmic curve, method: process required roller surface earlier and heat-treat, after bearing body is arranged on the ultrasonic wave numerical control device, finish turning in advance, when race way finish turning to 1/2, the vibratory tool head of repairing the type device carries out the hammering of ultra-high frequency to race way.Can realize finish turning and repair type carrying out simultaneously.But the feeding track of ultrasonic wave cutter is translation in these two kinds of methods, the cutter head of ultrasonic wave cutter and raceway face can not remain the normal direction application of force when the machining bearing raceway, so it is constant that hammer force can't keep, raceway is unbalance stress everywhere, influences integral fatigue life.
Summary of the invention
The present invention is directed to the deficiency that existing raceway surface strengthening technology exists, a kind of easy to operate, raceway intensified by ultrasonic wave method that strengthening effect is good is provided, a kind of device that can realize this method is provided simultaneously.
Raceway intensified by ultrasonic wave method of the present invention is:
The bearing body of bearing process required roller surface and whole bearing body heat-treated and half correct grinding after and finish grinding before, raceway face to bearing body is carried out intensified by ultrasonic wave at least one times continuously, bearing body is rotated along its axis, the cutterhead of ultrasonic wave cutter keeps normal direction to contact with raceway face all the time, applies constant normal force; Ultrasonic amplitude during intensified by ultrasonic wave is 5 μ m-25 μ m, the linear velocity that bearing body rotates is 2 meters/minute-100 meters/minute, the amount of feeding of ultrasonic wave cutter is that 0.05mm/ commentaries on classics-0.9mm/ changes, and the constant normal force that the cutterhead of ultrasonic wave cutter applies is 1Gpa-8Gpa.
The pivot of the cutterhead of ultrasonic wave cutter overlaps with the centre of gyration of raceway cross section arc.
The cutterhead of ultrasonic wave cutter applies constant pressure to raceway face and applies by pneumatic mode.
During intensified by ultrasonic wave, the constant normal force that the cutterhead of ultrasonic wave cutter applies is best to be 6.27Gpa, and the best linear velocity that bearing body rotates is 3.08 meters/minute, and the optimum feed amount of ultrasonic wave cutter is that 0.08mm/ changes.
Realize the raceway intensified by ultrasonic wave device of said method, by the following technical solutions:
Comprise Connection Block, turntable, connection support, cylinder and ultrasonic wave cutter, turntable is installed on the Connection Block, connecting support is connected with rotating part on the turntable, connect support and be provided with guide rail, cylinder is fixedly mounted on an end that connects support, the ultrasonic wave cutter is installed on the guide rail that connects support, and is connected with the piston rod of cylinder.
The ultrasonic wave cutter can be installed on the toolframe, is installed on the guide rail by toolframe.Toolframe can be C shape, so that the ultrasonic knife prodigiosin enough is in the bearing outer ring.
Air cylinder driven ultrasonic wave cutter moves, and turntable drives cylinder 3 and ultrasonic wave cutter 5 rotates together.
When said apparatus is used, at first with bearing body (bearing inner race or outer ring) clamping on spindle of numerical control lathe, by Connection Block whole device is fixedly connected on the workbench (knife rest) of numerically controlled lathe, and the pivot of turntable overlaps with the centre of gyration of raceway cross section arc.Bearing body rotates with lathe spindle, air cylinder driven ultrasonic wave cutter moves along guide rail, make the cutterhead on the ultrasonic wave cutter contact and apply constant pressure with raceway on the bearing body, turntable drives cutterhead along the cross section arc rotation feeding of outer raceway or interior raceway, finishes strengthening process.
The present invention carries out intensified by ultrasonic wave before the correct grinding to bearing body (inner ring and outer ring) after heat treatment and half correct grinding, and the cutterhead of ultrasonic wave cutter keeps normal direction to contact and apply constant compression force with raceway face all the time, raceway face is strengthened evenly everywhere, avoid strengthening uneven problem, bearing fatigue life can improve more than 10 times to 100 times.
Description of drawings
Fig. 1 is the structural representation of the external raceway intensified by ultrasonic wave of middle (center) bearing of the present invention device.
Fig. 2 is the ultrasonic wave cutter head position view when raceway is initially strengthened outward to bearing body.
Fig. 3 is the ultrasonic wave cutter head position view when the outer raceway of bearing body is strengthened end.
Fig. 4 is the structural representation of raceway intensified by ultrasonic wave device in the middle (center) bearing body of the present invention.
Fig. 5 is the ultrasonic wave cutter head position view when raceway in the bearing body is initially strengthened.
Fig. 6 is the ultrasonic wave cutter head position view when raceway in the bearing body is strengthened end.
Among the figure: 1, Connection Block, 2, turntable, 3, cylinder, 4, guide rail, 5, the ultrasonic wave cutter, 6, slide block, 7, cutterhead, 8, connect support, 9, toolframe, 10, bearing inner race, 11, bearing outer ring.
The specific embodiment
Fig. 1 has provided the structure that outer raceway on the bearing body (bearing inner race 10) to bearing carries out the intensified by ultrasonic wave device, mainly comprise Connection Block 1, turntable 2, connect support 8, cylinder 3 and ultrasonic wave cutter 5, turntable 2 is installed on the Connection Block 1, connect support 8 and be connected with rotating part on the turntable 2, connection support 8 is provided with guide rail 4.Cylinder 3 is fixedly mounted on an end that connects support 8.Ultrasonic wave cutter 5 is installed on the toolframe 9, and toolframe 9 is installed on the guide rail 4 that connects support 8 by slide block 6, and toolframe 9 is connected with the piston rod of cylinder 3, and is mobile with ultrasonic wave cutter 5 under cylinder 3 drives.Cutterhead 7 is installed on the ultrasonic wave cutter 5.Ultrasonic wave cutter 5 also can directly be installed on the guide rail 4 that connects support 8 by slide block 6, and is connected with the piston rod of cylinder 3.Turntable 2 can adopt numerical control rotating platform.The air inlet pipeline of cylinder 3 is provided with energy storage canister, to guarantee constant pressure.Connecting support 8 can rotate with the rotating part of turntable 2, and drives cylinder 3 and ultrasonic wave cutter 5 rotates together.Ultrasonic wave cutter 5 can adopt the structure of mentioning in the existing document, as CN1690231 disclosed " ultrasonic metallic surface processing device ".
Adopt said apparatus, the bearing inner race 10 of bearing process required roller surface and whole bearing body heat-treated and half correct grinding after and finish grinding before, its outboard raceway is carried out twice intensified by ultrasonic wave continuously.At first with bearing inner race 10 clampings on spindle of numerical control lathe, by Connection Block 1 whole device is fixedly connected on the workbench (knife rest) of numerically controlled lathe, and the pivot of turntable overlaps with the centre of gyration of raceway cross section arc.Starting numerically controlled lathe makes bearing inner race 10 rotate with main shaft.Under the driving of cylinder 3, ultrasonic wave cutter 5 moves along guide rail 4, make cutterhead 7 and the outer raceway on the bearing inner race 10 on the ultrasonic wave cutter 5 contact and apply the constant normal force of 1Gpa-8Gpa, assurance is constant to the contact stress of bearing inner race 10, and this pressure is invariable in whole strengthening process.The initial position of cutterhead 7 as shown in Figure 2.Start turntable 2, cutterhead 7 cross section arc of raceway outside bearing inner race 10 is rotated, the position of cutterhead 7 as shown in Figure 3 when outer raceway was strengthened end.Ultrasonic amplitude during intensified by ultrasonic wave is 5 μ m-25 μ m, and the linear velocity that bearing body rotates is 2 meters/minute-100 meters/minute, and the amount of feeding of ultrasonic wave cutter is that 0.05mm/ commentaries on classics-0.9mm/ changes.Optimum efficiency is to carry out intensified by ultrasonic wave twice, the constant normal force that the cutterhead of ultrasonic wave cutter applies is 6.27Gpa, for the first time the ultrasonic amplitude during intensified by ultrasonic wave is 9 μ m, for the second time the ultrasonic amplitude during intensified by ultrasonic wave is 15 μ m, the linear velocity that bearing body during twice intensified by ultrasonic wave rotates is 3.08 meters/minute, and the optimum feed amount of ultrasonic wave cutter is 0.08mm/ to be changeed.
Fig. 4 has provided the structure that interior raceway on the bearing body (bearing outer ring 11) to bearing carries out the intensified by ultrasonic wave device, the structure of the outer raceway intensifying device that provides with Fig. 1 is basic identical, difference is that the connection support 8 in Fig. 1 China and foreign countries raceway intensifying device is to be connected on the end face of turntable 2 rotating parts, toolframe 9 is rectangle and can omits and need not (ultrasonic wave cutter 5 be directly installed on the guide rail 4 that connects support 8), connection support 8 among Fig. 3 in the raceway intensifying device is to be connected on the side of turntable 2 rotating parts, toolframe 9 is C shape, so that ultrasonic wave cutter 5 can be in the bearing outer ring 11.If without C shape toolframe, also can make C shape to the shell of ultrasonic wave cutter 5.The same with strengthening process to the outer raceway of bearing inner race 10 to the strengthening process of the interior raceway of bearing outer ring 11, the initial position that cutterhead 7 is strengthened outer raceway as shown in Figure 5, the position of cutterhead 7 is as shown in Figure 6 when strengthening end.
Claims (7)
1. raceway intensified by ultrasonic wave method is characterized in that:
The bearing body of bearing process required roller surface and whole bearing body heat-treated and half correct grinding after and finish grinding before, raceway face to bearing body is carried out intensified by ultrasonic wave at least one times continuously, bearing body is rotated along its axis, the cutterhead of ultrasonic wave cutter keeps normal direction to contact with raceway face all the time, applies constant normal force; Ultrasonic amplitude during intensified by ultrasonic wave is 5 μ m-25 μ m, the linear velocity that bearing body rotates is 2 meters/minute-100 meters/minute, the amount of feeding of ultrasonic wave cutter is that 0.05mm/ commentaries on classics-0.9mm/ changes, and the constant normal force that the cutterhead of ultrasonic wave cutter applies is 1Gpa-8Gpa.
2. raceway intensified by ultrasonic wave method according to claim 1, it is characterized in that: the pivot of the cutterhead of described ultrasonic wave cutter overlaps with the centre of gyration of raceway cross section arc.
3. raceway intensified by ultrasonic wave method according to claim 1, it is characterized in that: the cutterhead of described ultrasonic wave cutter applies constant pressure to raceway face and applies by pneumatic mode.
4. raceway intensified by ultrasonic wave method according to claim 1, it is characterized in that: during described intensified by ultrasonic wave, the constant normal force that the cutterhead of ultrasonic wave cutter applies is 6.27Gpa, and the linear velocity that bearing body rotates is 3.08 meters/minute, and the amount of feeding of ultrasonic wave cutter is that 0.08mm/ changes.
5. raceway intensified by ultrasonic wave device, comprise Connection Block, turntable, connection support, cylinder and ultrasonic wave cutter, it is characterized in that: turntable is installed on the Connection Block, connecting support is connected with rotating part on the turntable, connect support and be provided with guide rail, cylinder is fixedly mounted on an end that connects support, and the ultrasonic wave cutter is installed on the guide rail that connects support, and is connected with the piston rod of cylinder.
6. raceway intensified by ultrasonic wave device according to claim 5, it is characterized in that: described ultrasonic wave cutter is installed on the toolframe, is installed on the guide rail by toolframe.
7. raceway intensified by ultrasonic wave device according to claim 6, it is characterized in that: described toolframe is C shape.
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| CN2013101610429A CN103231202A (en) | 2013-05-06 | 2013-05-06 | Bearing raceway ultrasonic reinforcing method and device |
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| CN2013101610429A CN103231202A (en) | 2013-05-06 | 2013-05-06 | Bearing raceway ultrasonic reinforcing method and device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108105A (en) * | 2014-06-20 | 2014-10-22 | 天津大学 | Clamp for connecting robot arm with surface ultrasonic rolling equipment |
| CN112894263A (en) * | 2019-12-04 | 2021-06-04 | 杨庆增 | Method for machining the surface of a rotating part |
| CN113584295A (en) * | 2021-07-12 | 2021-11-02 | 广州大学 | Ultrasonic strengthening processing device for bearing outer ring raceway |
| WO2022233085A1 (en) * | 2021-05-06 | 2022-11-10 | 武汉理工大学 | Ultrasonic impact surface nano-strengthening device and method for aero-engine bearing inner ring |
| WO2024113522A1 (en) * | 2022-12-02 | 2024-06-06 | 中国科学院金属研究所 | Surface mechanical strengthening device and method for raceway of rolling bearing ring |
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| US20020043313A1 (en) * | 1998-09-03 | 2002-04-18 | Uit, L.L.C. Company | Ultrasonic impact methods for treatment of welded structures |
| CN101503755A (en) * | 2009-03-12 | 2009-08-12 | 山东华云机电科技有限公司 | Numerical control supersonic machining apparatus for general lathe |
| CN102119068A (en) * | 2008-05-14 | 2011-07-06 | 机械设计有限公司 | The bearing processing system using an ultrasonic nano crystal surface modifier and processing method using the same |
| CN102490089A (en) * | 2011-12-14 | 2012-06-13 | 山东华云机电科技有限公司 | Ultrasonic machining device for outer circular surface |
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2013
- 2013-05-06 CN CN2013101610429A patent/CN103231202A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020043313A1 (en) * | 1998-09-03 | 2002-04-18 | Uit, L.L.C. Company | Ultrasonic impact methods for treatment of welded structures |
| CN102119068A (en) * | 2008-05-14 | 2011-07-06 | 机械设计有限公司 | The bearing processing system using an ultrasonic nano crystal surface modifier and processing method using the same |
| CN101503755A (en) * | 2009-03-12 | 2009-08-12 | 山东华云机电科技有限公司 | Numerical control supersonic machining apparatus for general lathe |
| CN102490089A (en) * | 2011-12-14 | 2012-06-13 | 山东华云机电科技有限公司 | Ultrasonic machining device for outer circular surface |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108105A (en) * | 2014-06-20 | 2014-10-22 | 天津大学 | Clamp for connecting robot arm with surface ultrasonic rolling equipment |
| CN112894263A (en) * | 2019-12-04 | 2021-06-04 | 杨庆增 | Method for machining the surface of a rotating part |
| WO2022233085A1 (en) * | 2021-05-06 | 2022-11-10 | 武汉理工大学 | Ultrasonic impact surface nano-strengthening device and method for aero-engine bearing inner ring |
| CN113584295A (en) * | 2021-07-12 | 2021-11-02 | 广州大学 | Ultrasonic strengthening processing device for bearing outer ring raceway |
| CN113584295B (en) * | 2021-07-12 | 2022-10-18 | 广州大学 | Ultrasonic strengthening processing device for bearing outer ring raceway |
| WO2024113522A1 (en) * | 2022-12-02 | 2024-06-06 | 中国科学院金属研究所 | Surface mechanical strengthening device and method for raceway of rolling bearing ring |
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Application publication date: 20130807 |