A bearing cylindrical roller ultrasonic lapping strengthening device

Abstract

The application discloses a kind of bearing cylindrical roller ultrasonic lapping strengthening device, it includes ultrasonic transducer, amplitude bar, piezoelectric tool head, roller clamp and lapping mechanism, multiple installation grooves for installing bearing cylindrical roller are uniformly distributed on roller clamp along the circumferential direction;Lapping mechanism includes base, lapping disc, rotating main shaft and clamping jaw, lapping disc is rotatably connected on base by rotating main shaft, roller clamp is rotatably arranged on lapping disc, the rotation axis of roller clamp is parallel with the rotation axis of lapping disc and does not coincide;Clamping jaw can constrain the radial movement of roller clamp, and can drive roller clamp to rotate around its center;Ultrasonic transducer, amplitude bar and piezoelectric tool head are sequentially connected from top to bottom, and piezoelectric tool head is arranged above roller clamp.Using the application, it can make "lapping" and "roll pressing" become the same process, can solve the current bearing cylindrical roller surface insufficient strength, easy fatigue failure problem, improve its service life.

Description

Technical Field

[0001] This invention belongs to the field of bearing cylindrical roller machining technology, specifically relating to an ultrasonic precision grinding and strengthening device for bearing cylindrical rollers. Background Technology

[0002] Bearings have a wide range of applications and occupy an important position in the industrial field. The rolling elements are their most critical and weakest components. Statistics show that 60-70% of bearing failures are due to varying degrees of fatigue damage to the cylindrical rollers. The outer diameter of the cylindrical roller is the main working surface of a rolling bearing, and its shape accuracy, surface quality, and consistency have a significant impact on the bearing's motion accuracy and service life. Currently, there are traditional and non-traditional machining methods for finishing bearing cylindrical rollers. Traditional machining processes are further divided into traditional grinding and centerless ultra-precision grinding. Centerless ultra-precision grinding is the most widely used ultra-precision machining method in the industry, while centering reciprocating ultra-precision grinding, electrochemical mechanical finishing, magnetohydrodynamic grinding, and dual-plane ultra-precision polishing are considered non-traditional machining methods.

[0003] Centerless ultra-precision machining is developed from centerless grinding, achieving the same high processing efficiency. This method is suitable for batch processing of the outer surfaces of cylindrical and tapered rollers. It combines the high production efficiency of centerless grinding with good surface and shape accuracy of the workpiece. It is generally used as the final process in machining cylindrical rollers. The centerless ultra-precision machining system mainly consists of an oilstone, two guide rollers, and the workpiece. The guide rollers have helical grooves, and the groove walls push the workpiece axially. Due to the applied load and relative motion with the workpiece, the abrasive grains in the oilstone can remove a small amount of material. At this stage, the machining accuracy of the workpiece is greatly influenced by the geometry and precision of the guide rollers.

[0004] Centerless machining suffers from low precision and poor consistency. Other non-traditional machining methods also have issues such as poor precision and low material removal rates. Moreover, they are expensive, have complex manufacturing systems, and pose significant environmental pollution risks. Furthermore, ultra-precision machining of bearing cylindrical rollers can only guarantee geometric features such as dimensional accuracy and surface roughness, and cannot complete the reconstruction and modification of the surface structure of the part, thus limiting its application in achieving high-performance fatigue-resistant manufacturing of bearing cylindrical rollers.

[0005] The above processing methods only process the surface of the cylindrical rollers of the bearing, but they cannot strengthen the cylindrical rollers of the bearing. This results in insufficient strength, easy fatigue failure, and short service life of the cylindrical rollers of the bearing. Summary of the Invention

[0006] The purpose of this invention is to provide an ultrasonic precision grinding and strengthening device for bearing cylindrical rollers, which can simultaneously perform grinding and polishing and ultrasonic rolling strengthening treatment on bearing cylindrical rollers. Even though "grinding" and "rolling" are the same process, it can not only improve the surface integrity of bearing cylindrical rollers, but also form a strengthening layer on the surface of bearing cylindrical rollers, solve the current problems of insufficient surface strength and easy fatigue failure of bearing cylindrical rollers, improve their service life, and reduce the processing errors caused by multiple clamping of workpieces.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] An ultrasonic precision grinding and strengthening device for bearing cylindrical rollers includes an ultrasonic transducer, an amplitude transformer, a piezoelectric tool head, a roller clamp, and a grinding mechanism. The roller clamp has multiple mounting slots evenly distributed along the circumferential direction for mounting bearing cylindrical rollers. When the bearing cylindrical rollers are mounted in the mounting slots, the extended axes of each bearing cylindrical roller intersect at the center of the roller clamp.

[0009] The grinding mechanism includes a base, a grinding disc, a rotating spindle, and grippers. The grinding disc is rotatably connected to the base via the rotating spindle. The roller clamp is rotatably mounted on the grinding disc. The rotation axis of the roller clamp is parallel to but does not coincide with the rotation axis of the grinding disc. The grippers can constrain the radial movement of the roller clamp and can drive the roller clamp to rotate around its center.

[0010] The ultrasonic transducer, the amplitude transformer, and the piezoelectric tool head are connected in sequence from top to bottom, with the piezoelectric tool head positioned above the roller clamp.

[0011] In a preferred embodiment of the present invention, the gripper is mounted on the base and clamps the outside of the roller clamp. The gripper includes a first clamping arm, a second clamping arm, a third clamping arm, and a fourth clamping arm. The first clamping arm and the second clamping arm are arranged on both sides of the roller clamp. The first clamping arm is fixedly connected to the base by a first screw, and the other end of the first clamping arm is rotatably connected to a first guide wheel. The second clamping arm is fixedly connected to the base by a second screw, and the other end of the second clamping arm is rotatably connected to a second guide wheel.

[0012] One end of the third clamping arm is fixedly connected to the first clamping arm by a third screw, and the other end of the third clamping arm is rotatably connected to a third guide wheel; one end of the fourth clamping arm is fixedly connected to the second clamping arm by a second screw, and the other end of the fourth clamping arm is rotatably connected to a fourth guide wheel;

[0013] The first guide wheel, the third guide wheel, the second guide wheel, and the fourth guide wheel are arranged sequentially at intervals along the circumferential direction, and each of them can abut against the outer side of the clamp.

[0014] As a preferred embodiment of the present invention, the base is provided with a first threaded hole and a second threaded hole, the first clamping arm is provided with a first through hole and a third threaded hole, the second clamping arm is provided with a second through hole and a fourth threaded hole, the first screw passes through the first through hole and is threadedly connected to the first threaded hole, and the second screw passes through the second through hole and is threadedly connected to the second threaded hole.

[0015] The third clamping arm has a first elongated hole at one end near the first clamping arm, and the third screw passes through the first elongated hole and is threaded into the third threaded hole; the fourth clamping arm has a second elongated hole at one end near the second clamping arm, and the fourth screw passes through the second elongated hole and is threaded into the fourth threaded hole.

[0016] In a preferred embodiment of the present invention, the ultrasonic transducer includes a transducer rear cover, a transducer front cover, multiple copper terminals, and multiple piezoelectric ceramic plates. The copper terminals and piezoelectric ceramic plates are disposed between the transducer rear cover and the transducer front cover, and are arranged alternately. Adjacent copper terminals are connected to the positive and negative terminals of a power source, respectively. The piezoelectric ceramic plates are piezoelectric materials exhibiting both positive and inverse piezoelectric effects. The transducer rear cover, the transducer front cover, the copper terminals, and the piezoelectric ceramic plates are connected in series and fixed by a first bolt.

[0017] As a preferred embodiment of the present invention, the amplitude transformer and the piezoelectric tool head are an integral structure, and the upper end of the amplitude transformer is connected and fixed to the lower end of the transducer front cover by a second bolt.

[0018] As a preferred embodiment of the present invention, it further includes a support mechanism for fixing the ultrasonic transducer, the support mechanism including a support frame and a support plate, the support plate being fixedly connected to the support frame and disposed above the grinding mechanism; the front cover of the transducer is provided with a flange, the flange being fixedly connected to the support plate.

[0019] As a preferred embodiment of the present invention, the cross-section of the mounting groove is octagonal.

[0020] As a preferred embodiment of the present invention, the amplitude transformer is a stepped amplitude transformer.

[0021] As a preferred embodiment of the present invention, the grinding mechanism further includes a grinding fluid supply system for supplying grinding fluid to the cylindrical rollers of the bearing, the output end of the grinding fluid supply system being connected to the mounting groove.

[0022] As a preferred embodiment of the present invention, a transition slope is provided between the outer edge of the roller clamp and the mounting groove, and the bottom of the roller clamp is provided with a plurality of through grooves for the outflow of grinding fluid and machining debris.

[0023] The ultrasonic precision grinding and strengthening device for cylindrical roller bearings provided by this invention has the following advantages compared with the prior art:

[0024] During processing, the grinding mechanism grinds and polishes the cylindrical bearing rollers assembled in the roller fixture, thereby improving the surface smoothness and mechanical properties, such as hardness, wear resistance, and fatigue strength. Simultaneously, a piezoelectric tool head is positioned on the cylindrical bearing rollers. Under the action of the ultrasonic transducer, amplitude transformer, and piezoelectric tool head, ultrasonic rolling is performed on the cylindrical bearing rollers. This process utilizes a combination of ultrasonic impact energy and static rolling to process the surface of the metal component (i.e., the cylindrical bearing rollers). The piezoelectric tool head applies a certain amplitude of ultrasonic energy along the surface normal of the cylindrical bearing rollers. Under certain feed conditions, the piezoelectric tool head transmits static pressure and ultrasonic impact vibration to the surface of rotating mechanical parts (i.e., bearing cylindrical rollers), generating an impacting effect that causes small-amplitude elastic-plastic deformation of the metal material. After processing, the surface of the bearing cylindrical rollers undergoes a certain degree of elastic recovery, and the resulting plastic flow fills or partially fills the "valleys" on the surface of the bearing cylindrical rollers with "peaks," forming a reinforced layer on the surface of the bearing cylindrical rollers. This significantly reduces its surface roughness Ra to the nanometer level, improving its overall surface performance indicators (such as increasing surface hardness and refining surface grains) and service life. As can be seen, this invention, through the organic combination of an ultrasonic transducer, an amplitude transformer, a piezoelectric tool head, and a grinding mechanism, can simultaneously perform grinding and polishing treatments and ultrasonic rolling strengthening treatments on bearing cylindrical rollers. Even though "grinding" and "rolling" are combined into the same process, it can not only improve the surface integrity of the bearing cylindrical rollers but also form a strengthening layer on the surface of the bearing cylindrical rollers. This solves the current problems of insufficient surface strength and easy fatigue failure of bearing cylindrical rollers, improves their service life, and reduces processing errors caused by multiple clamping of the workpiece. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0026] Figure 1 This is a schematic diagram of the structure of an ultrasonic precision grinding and strengthening device for cylindrical roller bearings provided in an embodiment of the present invention;

[0027] Figure 2 This is an exploded view of an ultrasonic finishing and strengthening device for cylindrical roller bearings provided in an embodiment of the present invention;

[0028] Figure 3 This is a top view of the grippers when they are clamped in the roller clamp;

[0029] Figure 4 It is at Figure 3 A cross-sectional view along direction AA in the structure shown;

[0030] Figure 5 This is a schematic diagram of the structure of the ultrasonic transducer, amplitude transformer, and piezoelectric tool head mounted on the support mechanism.

[0031] Marked in the image:

[0032] 1. Ultrasonic transducer; 11. Transducer rear cover; 12. Transducer front cover; 121. Flange; 13. Wiring copper strip; 14. Piezoelectric ceramic plate; 15. First bolt; 2. Amplitude rod; 21. Second bolt; 3. Piezoelectric tool head; 4. Roller clamp; 41. Mounting groove; 42. Transition ramp; 43. Through groove; 5. Grinding mechanism; 51. Base; 52. Grinding disc; 53. Rotary spindle; 54. Clamp; 541. First clamping arm 542. Second clamping arm; 543. Third clamping arm; 543a. First elongated hole; 544. Fourth clamping arm; 544a. Second elongated hole; 545. First guide wheel; 546. Second guide wheel; 547. Third guide wheel; 548. Fourth guide wheel; 55. First screw; 56. Second screw; 57. Third screw; 58. Fourth screw; 6. Support mechanism; 61. Support frame; 62. Support plate; 7. Bearing cylindrical roller. Detailed Implementation

[0033] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0034] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. It should be understood that the terms "first," "second," etc., are used in this invention to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0035] Please see Figures 1 to 5A preferred embodiment of the present invention provides an ultrasonic precision grinding and strengthening device for cylindrical bearing rollers, comprising an ultrasonic transducer 1, an amplitude transformer 2, a piezoelectric tool head 3, a roller clamp 4, and a grinding mechanism 5. The roller clamp 4 has multiple mounting slots 41 evenly distributed along its circumference for mounting cylindrical bearing rollers 7. When the cylindrical bearing rollers 7 are mounted in the mounting slots 41, the extended axes of each cylindrical bearing roller 7 intersect at the center of the roller clamp 4. The grinding mechanism 5 includes a base 51, a grinding disc 52, a rotating spindle 53, and grippers 54. The grinding disc 52 is rotatably connected to the base 51 via the rotating spindle 53. The roller clamp 4 is rotatably mounted on the grinding disc 52, and the rotation axis of the roller clamp 4 is parallel to but not coincident with the rotation axis of the grinding disc 52. The grippers 54 can constrain the radial movement of the roller clamp 4 and can drive the roller clamp 4 to rotate around its center. The ultrasonic transducer 1, the amplitude transformer 2, and the piezoelectric tool head 3 are connected in sequence from top to bottom, with the piezoelectric tool head 3 positioned above the roller clamp 4.

[0036] In this embodiment, the gripper 54 is mounted on the base 51 and clamps the outside of the roller clamp 4. The gripper 54 includes a first clamping arm 541, a second clamping arm 542, a third clamping arm 543, and a fourth clamping arm 544. The first clamping arm 541 and the second clamping arm 542 are arranged on both sides of the roller clamp 4. The first clamping arm 541 is fixedly connected to the base 51 by a first screw 55, and the other end of the first clamping arm 541 is rotatably connected to a first guide wheel 545. The second clamping arm 542 is fixedly connected to the base 51 by a second screw 56. The other end of the clamp 2 is rotatably connected to a second guide wheel 546; one end of the third clamping arm 543 is fixedly connected to the first clamping arm 541 by a third screw 57, and the other end of the third clamping arm 543 is rotatably connected to a third guide wheel 547; one end of the fourth clamping arm 544 is fixedly connected to the second clamping arm 542 by a second screw 56, and the other end of the fourth clamping arm 544 is rotatably connected to a fourth guide wheel 548; the first guide wheel 545, the third guide wheel 547, the second guide wheel 546 and the fourth guide wheel 548 are arranged sequentially at intervals along the circumferential direction, and all of them can abut against the outer side of the clamp. Therefore, during processing, the roller clamp 4 is rotatably mounted on the grinding disc 52, the bearing cylindrical roller 7 is mounted on the mounting groove 41 of the roller clamp 4, and the jaws 54 are clamped on the outside of the clamp. The jaws 54 can constrain the radial movement of the clamp and can drive the roller clamp 4 to rotate around its center. Therefore, the bearing cylindrical roller 7 mounted on the roller clamp 4 will also rotate around the center of the roller clamp 4. At the same time, due to the rotation of the grinding disc 52, the bearing cylindrical roller 7 will also rotate with the grinding disc 52. Therefore, the bearing cylindrical roller 7 can achieve both its own "rotation" and "revolution" around the center of the roller clamp 4.

[0037] Furthermore, the base 51 is provided with a first threaded hole and a second threaded hole, the first clamping arm 541 is provided with a first through hole and a third threaded hole, the second clamping arm 542 is provided with a second through hole and a fourth threaded hole, the first screw 55 passes through the first through hole and is threadedly connected to the first threaded hole, the second screw 56 passes through the second through hole and is threadedly connected to the second threaded hole; the third clamping arm 543 is provided with a first elongated hole 543a at one end near the first clamping arm 541, the third screw 57 passes through the first elongated hole 543a and is threadedly connected to the third threaded hole; the fourth clamping arm 544 is provided with a second elongated hole 544a at one end near the second clamping arm 542, the fourth screw 58 passes through the second elongated hole 544a and is threadedly connected to the fourth threaded hole. This design allows for the tightening and loosening of screws, enabling the fastening and loosening of various components within the gripper 54. It also allows for changes in the relative positions between the first gripper arm 541 and the base 51, the second gripper arm 542 and the base 51, the first gripper arm 541 and the third gripper arm 543, and the second gripper arm 542 and the fourth gripper arm 544. This allows for the installation of roller clamps 4 with different diameters, and consequently, it is suitable for the installation of cylindrical roller bearings 7 of different sizes, demonstrating strong versatility.

[0038] In this embodiment, the ultrasonic transducer 1 includes a transducer rear cover 11, a transducer front cover 12, multiple copper connecting pieces 13, and multiple piezoelectric ceramic pieces 14. The copper connecting pieces 13 and piezoelectric ceramic pieces 14 are disposed between the transducer rear cover 11 and the transducer front cover 12, and are arranged alternately. Adjacent copper connecting pieces 13 are connected to the positive and negative terminals of a power supply, respectively. The piezoelectric ceramic pieces 14 are piezoelectric materials exhibiting both positive and inverse piezoelectric effects. The transducer rear cover 11, the transducer front cover 12, the copper connecting pieces 13, and the piezoelectric ceramic pieces 14 are connected and fixed in series by a first bolt 15. The amplitude transformer 2 and the piezoelectric tool head 3 are integrally formed, and the upper end of the amplitude transformer 2 is connected and fixed to the lower end of the transducer front cover 12 by a second bolt 21. Preferably, there are four copper connecting plates 13 and four piezoelectric ceramic plates 14. The four copper connecting plates 13 are connected to the negative, positive, negative, and positive terminals of the power supply from top to bottom. It should be noted that the ultrasonic transducer 1 utilizes the inverse piezoelectric effect of the piezoelectric ceramic plate 14 to convert the high-frequency electrical signal into ultrasonic vibration of the same frequency (standing wave vibration in this embodiment). The standing wave vibration is amplified into high-frequency vibration by the amplitude transformer 2 and then reaches the piezoelectric tool head 3.

[0039] According to the ultrasonic precision grinding and strengthening device for bearing cylindrical rollers of the present invention, during processing, the grinding mechanism 5 can grind and polish the bearing cylindrical rollers 7 assembled in the roller fixture 4, thereby improving the surface flatness of the bearing cylindrical rollers 7 and improving their mechanical properties, such as hardness, wear resistance and fatigue strength; at the same time, the piezoelectric tool head 3 is set on the bearing cylindrical rollers 7, and under the action of the ultrasonic transducer 1, the amplitude transformer 2 and the piezoelectric tool head 3, the bearing cylindrical rollers 7 are subjected to ultrasonic rolling strengthening treatment, that is, the surface of the metal parts (i.e., the bearing cylindrical rollers 7) is processed by combining ultrasonic impact energy and static load rolling, and the piezoelectric tool head 3 moves along the bearing cylindrical rollers 7. An ultrasonic mechanical vibration of a certain amplitude is applied to the surface normal direction. Under certain feed conditions, the piezoelectric tool head 3 transmits static pressure and ultrasonic impact vibration to the surface of the rotating mechanical parts (i.e., the bearing cylindrical roller 7), generating a squeezing effect that causes the metal material to undergo small-amplitude elastic-plastic deformation. After processing, the surface of the bearing cylindrical roller 7 undergoes a certain elastic recovery, and the resulting plastic flow fills or partially fills the "valleys" on the surface of the bearing cylindrical roller 7 with "peaks," forming a reinforced layer on the surface of the bearing cylindrical roller 7. This greatly reduces its surface roughness Ra to the nanometer level, improving its comprehensive surface performance indicators (such as increasing surface hardness and refining surface grains) and service life.

[0040] As can be seen, the present invention, through the organic combination of ultrasonic transducer 1, amplitude transformer 2, piezoelectric tool head 3 and grinding mechanism 5, can simultaneously perform grinding and polishing treatment and ultrasonic rolling strengthening treatment on bearing cylindrical roller 7. Even though "grinding" and "rolling" are the same process, it can not only improve the surface integrity of bearing cylindrical roller 7, but also form a strengthening layer on the surface of bearing cylindrical roller 7, solve the current problem of insufficient surface strength and easy fatigue failure of bearing cylindrical roller 7, improve its service life, and reduce the processing error caused by multiple clamping of workpiece.

[0041] It should be noted that since the cylindrical roller 7 of the bearing can both rotate on its own axis and revolve around the center of the roller clamp 4, it can not only achieve a good grinding and polishing effect, but also make the position of the ultrasonic impact vibration sufficiently random and uniform, thus further improving the processing effect.

[0042] For example, the grinding mechanism 5 further includes a grinding fluid supply system (not shown in the figure) for supplying grinding fluid to the bearing cylindrical roller 7, the output end of which is connected to the mounting groove 41. During the processing, a certain amount of grinding fluid is added through the grinding fluid supply system. Under the action of ultrasound, the fluid medium in the grinding fluid, carrying abrasive particles, moves at high speed around the workpiece. Since the abrasive particles are very small, it can be assumed that the abrasive particles and the grinding fluid have the same speed. Furthermore, since there are a large number of tiny protrusions on the initial surface of the bearing cylindrical roller 7, the abrasive particles moving near the cylindrical surface of the roller are driven by the grinding fluid to generate various impacts and frictions with the surface of the bearing cylindrical roller 7. When the impact load reaches the strength limit of the material surface, some of the protrusions on the surface will be removed, thereby achieving the purpose of removing excess material from the surface. The impact of the abrasive particles is also conducive to the formation of a reinforcing layer, which is beneficial to fine machining. At the same time, the fine grinding fluid can improve the surface quality of the workpiece to be processed. Furthermore, to improve the processing effect, a transition slope 42 is provided between the outer edge of the roller clamp 4 and the mounting groove 41, which allows the grinding fluid to flow smoothly into the mounting groove 41; the bottom of the roller clamp 4 is provided with multiple through grooves 43 for the grinding fluid and processing debris to flow out.

[0043] For example, the ultrasonic grinding and strengthening device for the cylindrical roller 7 of the bearing in this embodiment further includes a support mechanism 6 for fixing the ultrasonic transducer 1. The support mechanism 6 includes a support frame 61 and a support plate 62. The support plate 62 is fixedly connected to the support frame 61 and is disposed above the grinding mechanism 5. The front cover 12 of the transducer is provided with a flange 121, which is fixedly connected to the support plate 62.

[0044] For example, the cross-section of the mounting groove 41 is preferably octagonal. Theoretically, the bearing cylindrical roller 7 can make point contact with four of the vertical edges of the mounting groove 41, which can reduce the contact area and prevent the roller clamp 4 from damaging the machining surface. In addition, it also reduces the resistance to the rotation of the bearing cylindrical roller 7, thus achieving better machining results.

[0045] For example, the amplitude transformer 2 is preferably a stepped amplitude transformer with a large amplitude, which can increase the amplitude of the piezoelectric tool head 3, thereby better performing high-frequency rolling strengthening on the workpiece.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A bearing cylindrical roller ultrasonic lapping reinforcement device, characterized in that, The device includes an ultrasonic transducer, an amplitude transformer, a piezoelectric tool head, a roller clamp, and a grinding mechanism. The roller clamp has multiple mounting slots evenly distributed along the circumferential direction for mounting bearing cylindrical rollers. When the bearing cylindrical rollers are mounted in the mounting slots, the extended axes of each bearing cylindrical roller intersect at the center of the roller clamp. The grinding mechanism includes a base, a grinding disc, a rotating spindle, and grippers. The grinding disc is rotatably connected to the base via the rotating spindle. The roller clamp is rotatably mounted on the grinding disc. The rotation axis of the roller clamp is parallel to but does not coincide with the rotation axis of the grinding disc. The grippers can constrain the radial movement of the roller clamp and can drive the roller clamp to rotate around its center. The gripper is mounted on the base and clamps the outside of the roller clamp. The gripper includes a first clamping arm, a second clamping arm, a third clamping arm, and a fourth clamping arm. The first and second clamping arms are arranged on both sides of the roller clamp. The first clamping arm is fixedly connected to the base by a first screw, and the other end of the first clamping arm is rotatably connected to a first guide wheel. The second clamping arm is fixedly connected to the base by a second screw, and the other end of the second clamping arm is rotatably connected to a second guide wheel. One end of the third clamping arm is fixedly connected to the first clamping arm by a third screw, and the other end of the third clamping arm is rotatably connected to a third guide wheel. One end of the fourth clamping arm is fixedly connected to the second clamping arm by a fourth screw, and the other end of the fourth clamping arm is rotatably connected to a fourth guide wheel. The first guide wheel, the third guide wheel, the second guide wheel, and the fourth guide wheel are arranged sequentially at intervals along the circumferential direction and all of them can abut against the outside of the clamp. The ultrasonic transducer, the amplitude transformer, and the piezoelectric tool head are connected in sequence from top to bottom, with the piezoelectric tool head positioned above the roller clamp.

2. The bearing cylindrical roller ultrasonic honing strengthening device according to claim 1, characterized in that, The base is provided with a first threaded hole and a second threaded hole, the first clamping arm is provided with a first through hole and a third threaded hole, the second clamping arm is provided with a second through hole and a fourth threaded hole, the first screw passes through the first through hole and is threadedly connected to the first threaded hole; the second screw passes through the second through hole and is threadedly connected to the second threaded hole. The third clamping arm has a first elongated hole at one end near the first clamping arm, and the third screw passes through the first elongated hole and is threaded into the third threaded hole; the fourth clamping arm has a second elongated hole at one end near the second clamping arm, and the fourth screw passes through the second elongated hole and is threaded into the fourth threaded hole.

3. The bearing cylindrical roller ultrasonic honing strengthening device according to claim 1, characterized in that, The ultrasonic transducer includes a transducer rear cover, a transducer front cover, multiple copper terminals, and multiple piezoelectric ceramic plates. The copper terminals and piezoelectric ceramic plates are disposed between the transducer rear cover and the transducer front cover, and are arranged alternately. Adjacent copper terminals are connected to the positive and negative terminals of a power source, respectively. The piezoelectric ceramic plates are piezoelectric materials with both positive and inverse piezoelectric effects. The transducer rear cover, the transducer front cover, the copper terminals, and the piezoelectric ceramic plates are connected in series and fixed by a first bolt.

4. The bearing cylindrical roller ultrasonic honing strengthening device according to claim 3, characterized in that, The amplitude transformer and the piezoelectric tool head are an integral structure, and the upper end of the amplitude transformer is connected and fixed to the lower end of the transducer front cover by a second bolt.

5. The ultrasonic precision grinding and strengthening device for cylindrical roller bearings according to claim 4, characterized in that, It also includes a support mechanism for fixing the ultrasonic transducer, the support mechanism including a support frame and a support plate, the support plate being fixedly connected to the support frame and disposed above the grinding mechanism; the front cover of the transducer is provided with a flange, the flange being fixedly connected to the support plate.

6. The bearing cylinder roller ultrasonic honing strengthening device according to claim 1, characterized in that, The mounting groove has an octagonal cross-section.

7. The bearing cylinder roller ultrasonic honing strengthening device according to claim 1, characterized in that, The amplitude transformer is a stepped amplitude transformer.

8. The bearing cylinder roller ultrasonic honing strengthening device according to claim 1, characterized in that, The grinding mechanism also includes a grinding fluid supply system for supplying grinding fluid to the cylindrical rollers of the bearing, the output end of which is connected to the mounting groove.

9. The bearing cylinder roller ultrasonic honing strengthening device according to claim 8, characterized in that, A transition slope is provided between the outer edge of the roller clamp and the mounting groove, and the bottom of the roller clamp is provided with multiple through grooves for the outflow of grinding fluid and machining debris.

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