CN114074245A - Ultrasonic deep rolling device for bearing rolling ring surface - Google Patents
Ultrasonic deep rolling device for bearing rolling ring surface Download PDFInfo
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- CN114074245A CN114074245A CN202111383301.3A CN202111383301A CN114074245A CN 114074245 A CN114074245 A CN 114074245A CN 202111383301 A CN202111383301 A CN 202111383301A CN 114074245 A CN114074245 A CN 114074245A
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- ultrasonic
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- deep rolling
- rolling
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- 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
- B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
- B23P9/04—Treating or finishing by hammering or applying repeated pressure
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Abstract
The invention relates to an ultrasonic deep rolling device for the surface of a bearing rolling ring, which comprises a workpiece clamp, an ultrasonic deep rolling processing tool, a processing tool clamping table, a rotary driving device and an axial driving device, wherein the workpiece clamp is arranged on the surface of the bearing rolling ring; the workpiece clamp comprises a clamping device and a cover plate, wherein a bearing rolling ring to be surface-strengthened is sleeved on the clamping device, and the cover plate is used for limiting the axial displacement of the bearing rolling ring; the ultrasonic deep rolling processing tool is arranged on the processing tool clamping table; the processing tool clamping table comprises a bottom plate, and an amplitude transformer supporting frame and an energy converter supporting frame which are arranged on the bottom plate, wherein the bottom plate is connected with an axial driving device, and the ultrasonic deep rolling tool head is driven by the axial driving device to reciprocate along the axial direction of the outer surface of the bearing rolling ring. The rotary driving device drives the bearing rolling ring to rotate around the axis of the rotary driving device, and meanwhile, the axial driving device drives the ultrasonic deep rolling tool head to reciprocate along the axial direction of the outer surface of the bearing rolling ring to perform ultrasonic impact on the outer surface of the bearing rolling ring, so that the surface is uniformly strengthened.
Description
Technical Field
The invention relates to the technical field of material surface strengthening treatment, in particular to an ultrasonic deep rolling device for the surface of a bearing rolling ring.
Background
The damage of mechanical parts always starts from a surface layer, and the mechanical parts often fail prematurely due to the problems of local fatigue, abrasion, corrosion and the like of the surface, so that the service life of the whole mechanical assembly system is shortened, the reliability is reduced, and even safety accidents are caused in severe cases, thereby causing personal and property loss. Thus, product performance, especially its reliability and durability, is closely related to the surface quality of the component. The strengthening mechanism of the existing surface strengthening technology mainly has three aspects: introducing residual compressive stress, producing work hardening and reducing surface roughness.
The rolling bearing is used as a part which is in service under severe working conditions for a long time and is influenced by the alternating action of heavy load, the continuous overload action, the lubrication state transition between friction pairs and the like for a long time, and the requirement on the surface quality of the bearing is higher. The surface strengthening technologies commonly used today are many, such as shot peening, traditional deep rolling, traditional rolling, laser shock peening, low plasticity polishing, mechanical surface grinding, plasma carburizing and the like, and all of the surface strengthening technologies can significantly refine the microstructure of the surface layer of the component and improve the mechanical properties of the component, but all of them have certain limitations.
The traditional rolling technology requires that a rolling tool head and a workpiece to be processed are always in contact under a high stress state, so that a large friction force is always generated at the contact position, and the abrasion to the rolling tool head is large; in addition, the traditional rolling process can generate shearing stress on the sub-surface of the part and scratch the surface of the part. The shot peening can obviously improve the fatigue resistance, the corrosion resistance, the hardness and the like of parts, however, shots used for shot peening are generally small, and the generated impact kinetic energy is small, so that the depth of a residual compressive stress layer generated by impact is shallow, and one more key defect of shot peening is that the positions of shot peening impact are random, adjacent indentations are overlapped, and if the set processing parameters are not appropriate, the surface processing quality is deteriorated, namely, the surface roughness of a processing piece is increased. Strengthening the surface by laser beam impingement requires a powered laser generator, which is expensive to manufacture and maintain.
In addition, many ultrasonic deep rolling processing researches are limited by factors such as size and structure of ultrasonic deep rolling processing equipment, and most of deep rolling processing objects are concentrated on processing metal plates, metal bars and the like, so that the main ultrasonic deep rolling research mainly aims at basic materials and rarely aims at solid parts in engineering application, and the defect that reinforced materials are not easily combined with actual engineering application is overcome.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an ultrasonic deep rolling device for the surface of a bearing rolling ring aiming at the defects in the prior art, the device is used for strengthening the surface of the outer surface of an outer (inner) rolling ring of a bearing piece in engineering application, and the ultrasonic deep rolling technology is adopted, so that the micro grain refinement and the macro mechanical property improvement of the material brought to the traditional surface strengthening technology such as shot blasting, rolling, laser impact and the like can be reserved, and meanwhile, the 'peak clipping and valley filling' effect in the impact process can be utilized, and the surface quality of the surface of the material can be greatly improved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an ultrasonic deep rolling device for the surface of a bearing rolling ring comprises a workpiece clamp, an ultrasonic deep rolling machining tool, a machining tool clamping table, a rotary driving device and an axial driving device; the workpiece clamp comprises a clamping device and a cover plate, wherein a rotary supporting table is arranged in the middle of the clamping device, rotating shafts are arranged on two sides of the rotary supporting table, a bearing rolling ring to be surface-strengthened is sleeved on the rotary supporting table, the rotating shafts are connected with a rotary driving device, the bearing rolling ring is driven to rotate around the axis of the bearing rolling ring through the rotary driving device, and the cover plate is arranged at the end part of the rotary supporting table and used for limiting the axial displacement of the bearing rolling ring; the ultrasonic deep rolling processing tool comprises an ultrasonic deep rolling tool head, an ultrasonic amplitude transformer, an ultrasonic transducer and an ultrasonic generator which are connected in sequence, wherein the ultrasonic deep rolling tool head, the ultrasonic amplitude transformer and the ultrasonic transducer are all arranged on the processing tool clamping table; the processing tool clamping table comprises a bottom plate, an amplitude transformer support frame and a transducer support frame, wherein the amplitude transformer support frame and the transducer support frame are arranged on the bottom plate, the bottom plate is arranged on one side of a bearing rolling ring, the bottom plate is connected with an axial driving device, an ultrasonic amplitude transformer is arranged on the amplitude transformer support frame, an ultrasonic transducer is arranged on the transducer support frame, an ultrasonic deep rolling tool head is in contact with the bearing rolling ring, and drives the ultrasonic deep rolling tool head to do reciprocating motion along the axial direction of the outer surface of the bearing rolling ring to perform ultrasonic impact on the outer surface of the bearing rolling ring, so that the surface is uniformly strengthened.
In the above scheme, the workpiece fixture is arranged on a micro lathe, the rotary driving device adopts a three-jaw chuck on the micro lathe, a rotary shaft on one side of the rotary supporting platform is connected with the three-jaw chuck, and a rotary shaft on the other side of the rotary supporting platform is positioned and supported through a right center on the micro lathe.
In the above scheme, the axial driving device adopts a support plate of a micro lathe and a screw rod connected with the support plate, the screw rod is connected with a main shaft of the micro lathe, and the main shaft drives the screw rod to rotate, so as to drive the support plate to reciprocate along the axial direction of the outer surface of the bearing rolling ring; the bottom plate is fixedly arranged on the supporting plate.
In the above scheme, the ultrasonic deep rolling device further comprises a support, the support is fixedly installed at the lower part of the tail end of the processing tool clamping table, and the bottom plate is placed on the support and can reciprocate on the support.
In the above scheme, the upper portion of transducer support frame sets up the support frame apron, ultrasonic transducer installs behind the transducer support frame, through bolt fixed connection support frame apron and transducer support frame realize the fastening to ultrasonic transducer.
In the above scheme, the ultrasonic deep rolling tool head, the ultrasonic amplitude transformer and the ultrasonic transducer are all horizontally arranged.
The invention has the beneficial effects that:
1. the ultrasonic deep rolling device on the surface of the bearing rolling ring drives the bearing rolling ring to rotate around the axis of the ultrasonic deep rolling device through the rotary driving device, and simultaneously drives the ultrasonic deep rolling tool head to reciprocate along the axial direction of the outer surface of the bearing rolling ring through the axial driving device to perform ultrasonic impact on the outer surface of the bearing rolling ring, so that the uniform surface strengthening is realized. The ultrasonic deep rolling processing method can effectively retain the technical advantages of traditional surface strengthening, such as improvement of fatigue strength, hardness, wear resistance and corrosion resistance of the material, and meanwhile, the ultrasonic impact tool head impacts on the surface of the material at high frequency, so that the surface of the processed material generates a peak clipping and valley filling effect, and compared with the traditional technology, the roughness of the surface of the material is greatly reduced.
2. The ultrasonic deep rolling device micro lathe is improved, so that the whole device can realize certain automation, a bearing rolling ring to be processed rotates along with a lathe spindle, and an ultrasonic deep rolling tool head transversely moves at a constant speed along with a tool rack supporting plate locked on a screw rod, so that the surface of the bearing rolling ring to be processed is uniformly strengthened. In addition, the adjustability of the rotation speed of the lathe spindle can realize the autonomous control of the bearing surface strengthening effect, for example, the lathe spindle rotates at a higher rotation speed to realize the high-efficiency processing of a single bearing, or the lathe spindle rotates at a lower rotation speed to realize the fine strengthening of the bearing surface.
3. The reinforcing object of the ultrasonic deep rolling device based on the micro lathe transformation is the outer surface of the bearing rolling ring, and the ultrasonic deep rolling device has wide engineering practical application prospect.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a perspective view showing an ultrasonic deep rolling apparatus of a surface of a rolling ring of a bearing according to the present invention;
FIG. 2 is a top view of the ultrasonic deep rolling device shown in FIG. 1 in an operating state;
FIG. 3 is an exploded view of the workpiece holder of the ultrasonic deep rolling device shown in FIG. 1;
FIG. 4 is an exploded view of an ultrasonic deep rolling tool of the ultrasonic deep rolling device shown in FIG. 1;
FIG. 5 is an exploded view of a tool holding station of the ultrasonic deep rolling device of FIG. 1;
fig. 6 is a structural view of a stand of the ultrasonic deep rolling device shown in fig. 1.
In the figure: 10. a workpiece holder; 11. a clamping device; 111. rotating the support table; 112. a rotating shaft; 12. a cover plate;
20. ultrasonic deep rolling processing tools; 21. an ultrasonic deep rolling tool head; 22. an ultrasonic horn; 23. an ultrasonic transducer; 24. an ultrasonic generator;
30. a machining tool holding table; 31. a base plate; 32. a luffing jib support frame; 33. a transducer support frame; 331. a support frame cover plate;
40. a support;
50. a micro lathe; 51. a three-jaw chuck; 52. a right centre; 53. a support plate;
200. and (4) rolling rings of the bearing.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 6, an ultrasonic deep rolling apparatus for a bearing race surface according to an embodiment of the present invention includes a work holder 10, an ultrasonic deep rolling tool 20, a tool holding table 30, a rotary driving device, and an axial driving device.
As shown in fig. 3, the work fixture 10 includes a clamping device 11 and a cover plate 12, the middle of the clamping device 11 is a rotary support platform 111, two sides of the rotary support platform 111 are provided with a rotary shaft 112, a bearing rolling ring 200 to be surface-strengthened is sleeved on the rotary support platform 111, the rotary shaft 112 is connected with a rotary driving device, the bearing rolling ring 200 is driven to rotate around its axis by the rotary driving device, and the cover plate 12 is mounted at an end of the rotary support platform 111 for limiting axial displacement of the bearing rolling ring 200. One of the inner rolling ring and the outer rolling ring of the bearing is cut and separated by using a linear cutting technology, the rolling ring with the surface needing ultrasonic deep rolling reinforcement is taken down and sleeved on the rotary support table 111, the cover plate 12 is installed, and the cover plate 12 is fixedly connected with the rotary support table 111 by using bolts so as to fasten the bearing rolling ring 200 on a clamp.
As shown in fig. 4, the ultrasonic deep rolling tool 20 includes an ultrasonic deep rolling tool head 21, an ultrasonic horn 22, an ultrasonic transducer 23, and an ultrasonic generator 24, which are connected in sequence, wherein the ultrasonic deep rolling tool head 21, the ultrasonic horn 22, and the ultrasonic transducer 23 are all mounted on a processing tool holding stage 30. The ultrasonic generator 24 converts 220V ac into dc with continuously adjustable voltage, and then into high frequency ac, the ultrasonic transducer 23 converts the electric power generated by the ultrasonic generator 24 into mechanical power (i.e. ultrasonic vibration), the ultrasonic horn 22 amplifies the displacement or speed of the mechanical vibration converted by the ultrasonic transducer 23, and finally transmits the amplified displacement or speed to the ultrasonic deep rolling tool head 21, so as to form tens of thousands of ultrasonic impacts on the surface of the workpiece to be strengthened.
As shown in fig. 5, the machining tool holding table 30 includes a base plate 31, and a horn support frame 32 and a transducer support frame 33 which are mounted on the base plate 31 by bolts. The bottom plate 31 is disposed on the side of the bearing rolling ring 200 and connected to the axial driving device. The ultrasonic horn 22 is installed on the horn support frame 32, the ultrasonic transducer 23 is installed on the transducer support frame 33, and the ultrasonic deep rolling tool head 21 is in contact with the bearing rolling ring 200. The ultrasonic deep rolling tool head 21 is driven by the axial driving device to reciprocate along the axial direction of the outer surface of the bearing rolling ring 200, ultrasonic impact is carried out on the outer surface of the bearing rolling ring 200, and uniform strengthening of the surface is realized.
Further preferably, the ultrasonic deep rolling device is formed by modification based on a micro lathe 50. The workpiece holder 10 is mounted on a micro lathe 50, the rotation driving device is a three-jaw chuck 51 on the micro lathe 50, one side of the rotation support base 111 is connected with the three-jaw chuck 51, the other side of the rotation support base 111 is positioned and supported by a right center 52 on the micro lathe 50, and the three-jaw chuck 51 of the micro lathe 50 drives the bearing rolling ring 200 to rotate. The axial driving means is modified from the tool holder of the micro lathe 50, the tool holder is removed from the lathe support plate 53, the machining tool holding table 30 is mounted on the support plate 53, and the base plate 31 is fastened to the support plate 53 of the micro lathe 50 by bolts. The support plate 53 is connected with a screw rod of the tool holder, the screw rod is connected with a main shaft of the micro lathe 50, and the main shaft drives the screw rod to rotate forwards or backwards, so that the support plate 53 is driven to reciprocate along the axial direction of the outer surface of the bearing rolling ring 200. And the bottom plate 31 is fixedly installed on the supporting plate 53 to move synchronously with the supporting plate 53.
The ultrasonic deep rolling device is improved based on the micro lathe 50, so that the whole device can realize certain automation. The bearing rolling ring 200 to be processed does rotary motion along with the main shaft of the micro lathe 50, meanwhile, the main shaft rotated by the lathe can drive the screw rod of the tool rest to rotate, after the supporting plate 53 of the tool rest and the screw rod are locked, the screw rod can provide transverse motion of the ultrasonic deep rolling tool head 21, therefore, the ultrasonic deep rolling device can realize axial motion of the ultrasonic deep rolling tool head 21 along the outer surface of the bearing outer (inner) rolling ring, meanwhile, the bearing rolling ring 200 rotates around the axis of the bearing rolling ring 200, and uniform strengthening of the surface of the bearing rolling ring 200 to be processed is realized. Furthermore, due to the adjustability of the spindle speed of the micro lathe 50, an autonomous control of the bearing surface strengthening effect can be achieved, for example, a high efficiency machining of a single bearing can be achieved with a high rotational speed of the lathe spindle, or a fine strengthening of the bearing surface can be achieved with a lower rotational speed of the lathe spindle.
Further, the ultrasonic deep rolling tool 20 has a large length and a heavy weight, and after being combined with the clamping table 30 of the machining tool and mounted on the supporting plate 53 of the micro lathe 50, the ultrasonic deep rolling tool extends a long distance in a direction perpendicular to the main shaft of the micro lathe 50, and a large load is placed on the ultrasonic transducer supporting frame 33, so that the lathe may be unstable or even topple over during machining, and the bearing rolling ring 200 rotating during machining may cause the ultrasonic deep rolling tool head 21 to shake up and down. Therefore, the aluminum alloy section is used, the bracket 40 is arranged at the lower part of the tail end of the processing tool clamping table 30, the structure of the bracket 40 is shown in figure 6, the bottom plate 31 is placed on the bracket 40 and can reciprocate on the bracket 40, and the processing stability and reliability of the whole processing system are improved.
Further optimize, the upper portion of transducer support frame 33 sets up support frame apron 331, and ultrasonic transducer 23 installs behind transducer support frame 33, through bolt fixed connection support frame apron 331 and transducer support frame 33, realizes the fastening to ultrasonic transducer 23.
Further optimized, the ultrasonic deep rolling tool head 21, the ultrasonic amplitude transformer 22 and the ultrasonic transducer 23 are all horizontally arranged, and the axis is vertical to the axis of the bearing rolling ring 200.
The ultrasonic deep rolling device of the invention is adopted to carry out strengthening treatment on the surface of the bearing rolling ring 200, so that the technical advantages of traditional surface strengthening can be effectively reserved, such as improvement of fatigue strength, hardness, wear resistance and corrosion resistance of materials, and meanwhile, the ultrasonic impact tool head impacts on the surface of the materials at high frequency, so that the surface of the processed materials generates the effect of 'peak clipping and valley filling', and compared with the traditional technology, the roughness of the surface of the materials is greatly reduced.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383301.3A CN114074245A (en) | 2021-11-22 | 2021-11-22 | Ultrasonic deep rolling device for bearing rolling ring surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383301.3A CN114074245A (en) | 2021-11-22 | 2021-11-22 | Ultrasonic deep rolling device for bearing rolling ring surface |
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| CN114074245A true CN114074245A (en) | 2022-02-22 |
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| CN202111383301.3A Pending CN114074245A (en) | 2021-11-22 | 2021-11-22 | Ultrasonic deep rolling device for bearing rolling ring surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116252099A (en) * | 2023-01-10 | 2023-06-13 | 北京理工大学 | Bearing curved surface raceway rolling device and method |
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Application publication date: 20220222 |