Ultrasonic vibration atomization mechanism and grinding system for lead screw nut

Abstract

According to the ultrasonic vibration atomization mechanism and the grinding system of the lead screw nut, the ultrasonic vibration atomization mechanism comprises a body part and an atomization part, the body part comprises a containing shell, an ultrasonic power source, transducers and a vibration module, the ultrasonic power source is used for providing electric signals, and the vibration module comprises the transducer located at the head end of the vibration module; the transducer is connected with an ultrasonic power supply and is used for converting an electric signal into mechanical vibration, the tail end of the vibration module is connected with a vibrated component, and part of the vibration module is connected with the accommodating shell; the atomizing part comprises an atomizing nozzle, a liquid conveying rod, a liquid conveying pump and a liquid storage tank, and the atomizing nozzle is connected with the tail end of the vibration module. The high-precision and high-surface-quality machining technical requirement and use requirement of the internal thread form of the hole workpiece are met, atomized grinding fluid can enter the space between the grinding material and the workpiece more easily, and the cooling and lubricating effect of the grinding fluid is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, in particular to an ultrasonic vibration atomization mechanism and a grinding system for a lead screw nut. Background Art

[0002] The special geometric shape of the internal thread of the planetary roller screw nut is usually 1.095mm in width, 90 degrees in angle, tolerance [+11", -11"], 19.531 in tooth root diameter, tolerance [+0.02, 0], 20 in pitch diameter, tolerance [+0.001, 0], 0.624 in pitch thickness, tolerance [0, -0.001], Ra0.1 in tooth surface roughness, and 1 micron in machining accuracy. The material is GCr15 with high hardness and 60-62HRC in hardness. In addition, due to the limitation of the root diameter of the inner hole of the planetary roller screw nut, the grinding wheel shaft has a diameter of 8mm, a length of 170mm, and an aspect ratio of more than 20, which is a typical weak rigidity mechanism. When grinding the internal threads of planetary roller screw nuts, chatter is very likely to occur, resulting in low machining accuracy and finish of the internal thread profile of the planetary roller screw nut, high scrap rate, and deteriorated surface micro-quality. This cannot meet the high-precision and high-surface quality machining technology and usage requirements of the internal thread profile of the planetary roller screw nut, and has become an industry bottleneck problem faced by high-performance parts processing.

[0003] Ultrasonic grinding is a process that uses ultrasonic vibration of the grinding wheel (or workpiece) for grinding during the grinding process. When the ultrasonic generator power supply is turned on, the ultrasonic generator sends an electrical signal to the ultrasonic transducer (piezoelectric type). The ultrasonic transducer converts the electrical signal into a longitudinal mechanical vibration of the same frequency, transmits it to the amplitude rod at the same time, and amplifies the amplitude to a predetermined value, driving the resonant tool rod for vibration cutting. The ultrasonic transducer, the amplitude rod, and the tool rod are all in a resonant state with the ultrasonic frequency output by the generator, forming a resonant system, and its fixed points should all be on the displacement node. Usually in the grinding process, in order to reduce the grinding temperature in the grinding area and lubricate the abrasive particles on the grinding wheel, a large amount of grinding fluid is used. Although a large amount of grinding fluid is used, it can only reduce the grinding temperature to a limited extent and can only play a role in boundary lubrication of the abrasive particles. At the same time, a large amount of grinding fluid and the waste liquid treatment costs generated are also wasted. How to meet the high-precision and high-surface quality processing technology requirements and usage requirements of the internal thread profile of hole-type workpieces, and effectively reduce the grinding temperature, fully lubricate the abrasive-hole workpiece grinding area, reduce grinding fluid, and save energy and reduce emissions, is a technical problem that needs to be urgently solved in this field. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to provide an ultrasonic vibration atomization mechanism, which can not only drive the grinding wheel or workpiece to vibrate, meet the high-precision and high-surface quality processing technical requirements and use requirements of the internal thread profile of hole-type workpieces, but also can atomize the grinding fluid, reduce the amount of grinding fluid used, and improve the cooling and lubrication effect of the grinding fluid.

[0005] In order to solve the above technical problems, the present invention provides an ultrasonic vibration atomization mechanism, comprising a main body part and an atomization part;

[0006] The body part includes a housing, an ultrasonic power supply, a transducer and a vibration module. The housing is provided with a housing cavity, the housing cavity has a head end facing the negative direction of the X-axis and a terminal end facing the positive direction of the X-axis, the terminal end of the housing cavity is open, the ultrasonic power supply is used to provide an electrical signal, the transducer is arranged in the housing cavity, the transducer is connected to the ultrasonic power supply and is used to convert the electrical signal into mechanical vibration; the vibration module has a head end facing the negative direction of the X-axis and a terminal end facing the positive direction of the X-axis, the head end of the vibration module is connected to the transducer, the terminal end of the vibration module is connected to the vibrated component, and the vibration module is connected to the housing;

[0007] The atomization part includes an atomization nozzle, an infusion rod, an infusion pump and a liquid storage tank. The atomization nozzle is used to spray out a mist grinding fluid. The atomization nozzle is connected to the end of the vibration module. The infusion rod is coaxially fixed inside the vibration module. One end of the infusion rod is connected to the atomization nozzle; the infusion pump is used to transport the grinding fluid. The outlet of the infusion pump is connected to the other end of the infusion rod through an infusion pipeline; the liquid storage tank is used to store the grinding fluid. The liquid storage tank is connected to the inlet of the infusion pump through an infusion pipeline.

[0008] Furthermore, the infusion rod is an externally threaded rod provided with a hollow channel, and the infusion rod is threadedly connected to the inside of the vibration module.

[0009] Furthermore, the atomization part also includes a suction nozzle component and a cooling negative pressure device. The suction nozzle component is arranged on the port side of the hole workpiece away from the vibration module. The suction nozzle component is used to suck out the mist grinding fluid in the hole workpiece. The cooling negative pressure device connects the suction nozzle component and the liquid storage tank. The cooling negative pressure device is used to provide negative pressure for the suction nozzle component and cool and liquefy the sucked mist grinding fluid and return it to the liquid storage tank.

[0010] Furthermore, the liquid storage tank includes an oil return area and an oil clean area, the oil return area is connected to the cooling negative pressure device, the oil clean area is connected to the infusion pump, and a filter and a magnetic filtration membrane are provided between the oil return area and the oil clean area.

[0011] Furthermore, the vibration module includes a first amplitude transformer, a second amplitude transformer and a mode conversion rod, the first amplitude transformer and the second amplitude transformer are used to transmit and amplify the vibration amplitude, the mode conversion rod is used to decompose the longitudinal vibration into longitudinal torsional vibration, adjust vibration parameters and amplify the vibration amplitude, the first amplitude transformer is connected to the transducer, the second amplitude transformer is connected to the first amplitude transformer, one end of the mode conversion rod is connected to the second amplitude transformer, and the other end is connected to the vibrated component.

[0012] Further, the first amplitude changing rod is integrally formed with a first supporting portion, the second amplitude changing rod is integrally formed with a second supporting portion, and the first supporting portion and the second supporting portion are both connected to the accommodating shell.

[0013] Furthermore, the main body portion further includes a first rotating support, and the accommodating shell is rotatably connected to the inner side of the first rotating support around the X-axis direction.

[0014] Furthermore, a stator is provided on the inner side of the first rotating support, and a rotor is provided on the outer side of the accommodating shell. The stator and the rotor interact with each other to drive the accommodating shell to rotate. The first rotating support, the accommodating shell, the stator and the rotor constitute an electric spindle, and the end of the vibration module is connected to a grinding wheel rod.

[0015] The present invention also provides a grinding system for a screw nut, comprising:

[0016] The ultrasonic vibration atomization mechanism, the first rotating support and the accommodating housing are unlockably locked by a locking component, and the end of the vibration module is threadedly connected to a screw nut;

[0017] A workpiece mechanism, the workpiece mechanism comprising a second rotating support, a clamping component and a rotating drive device, the clamping component is rotatably connected to the inner side of the second rotating support around the X-axis direction, and is used to fix the screw nut and keep the axial direction of the screw nut in the X-axis direction, and the rotating drive device is used to drive the clamping component to rotate around the X-axis direction;

[0018] A propulsion mechanism, the propulsion mechanism is used to drive the ultrasonic vibration atomization mechanism to translate along the X-axis direction;

[0019] A first turntable, the first turntable is used to drive the workpiece mechanism to rotate around the Y-axis direction;

[0020] A longitudinal translation mechanism, the longitudinal translation mechanism is used to drive the ultrasonic vibration atomization mechanism and the workpiece mechanism to translate along the X-axis direction;

[0021] An internal grinding mechanism, the internal grinding mechanism is connected to the internal grinding wheel and drives the internal grinding wheel to rotate around the X-axis direction;

[0022] An internal thread grinding mechanism, wherein the internal thread grinding mechanism is connected to an internal thread grinding wheel and drives the internal thread grinding wheel to rotate around the X-axis direction;

[0023] A second turntable, the second turntable is used to drive the internal thread grinding mechanism to rotate around the Z-axis direction;

[0024] A lifting mechanism, the lifting mechanism is used to drive the internal thread grinding mechanism to move up and down along the Y-axis direction;

[0025] A lateral translation mechanism, the lateral translation mechanism is used to drive the internal grinding mechanism and the internal thread grinding mechanism to translate along the Z-axis direction;

[0026] Among them, the ultrasonic vibration atomization mechanism is arranged on one side of the workpiece mechanism in the X-axis direction; the internal cylindrical grinding mechanism and the internal thread grinding mechanism are arranged at intervals along the Z-axis direction and are both arranged on the other side of the workpiece mechanism in the X-axis direction.

[0027] The present invention also provides another grinding system for a lead screw nut, comprising:

[0028] A workpiece mechanism, the workpiece mechanism comprising a second rotating support, a clamping component and a rotating drive device, the clamping component is rotatably connected to the inner side of the second rotating support around the X-axis direction, and is used to fix the screw nut and keep the axial direction of the screw nut in the X-axis direction, and the rotating drive device is used to drive the clamping component to rotate around the X-axis direction;

[0029] A first turntable, the first turntable is used to drive the workpiece mechanism to rotate around the Y-axis direction;

[0030] A longitudinal translation mechanism, the longitudinal translation mechanism is used to drive the workpiece mechanism to translate along the X-axis direction;

[0031] An internal grinding mechanism, the internal grinding mechanism is connected to the internal grinding wheel and drives the internal grinding wheel to rotate around the X-axis direction;

[0032] An internal thread grinding mechanism, wherein the internal thread grinding mechanism is connected to an internal thread grinding wheel and drives the internal thread grinding wheel to rotate around the X-axis direction;

[0033] A second turntable, the second turntable is used to drive the internal thread grinding mechanism to rotate around the Z-axis direction;

[0034] A lifting mechanism, the lifting mechanism is used to drive the internal thread grinding mechanism to move up and down along the Y-axis direction;

[0035] A lateral translation mechanism, the lateral translation mechanism is used to drive the internal grinding mechanism and the internal thread grinding mechanism to translate along the Z-axis direction;

[0036] Among them, the internal cylindrical grinding mechanism and the internal thread grinding mechanism are arranged at a distance along the Z-axis direction and are both arranged on the same side of the X-axis direction of the workpiece mechanism. The internal cylindrical grinding mechanism and the internal thread grinding mechanism are both the ultrasonic vibration atomization mechanism. The end of the vibration module of the internal cylindrical grinding mechanism is connected to the internal cylindrical grinding wheel, and the end of the vibration module of the internal thread grinding mechanism is connected to the internal thread grinding wheel.

[0037] The above technical scheme of the present invention has the following advantages compared with the prior art: in the ultrasonic vibration atomization mechanism and the screw nut grinding system described in the present invention, on the one hand, the vibration module can drive the grinding wheel or the workpiece to vibrate, meeting the high-precision and high-surface quality processing technical requirements and use requirements of the internal thread profile of hole-type workpieces; on the other hand, the vibration module can drive the atomization nozzle to vibrate, so that the grinding fluid is atomized, which not only reduces the amount of grinding fluid used, but also produces a capillary effect between the abrasive and the workpiece, so that the grinding fluid is more easily inserted between the abrasive and the workpiece, thereby improving the cooling and lubrication effect of the grinding fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0039] Figure 1 It is a schematic diagram of the ultrasonic vibration atomization mechanism disclosed in the first embodiment of the present invention;

[0040] Figure 2 It is a partial cross-sectional view of the ultrasonic vibration atomization mechanism disclosed in the first embodiment of the present invention;

[0041] Figure 3 A schematic diagram of an ultrasonic vibration atomization mechanism disclosed in Embodiment 2 of the present invention;

[0042] Figure 4 A schematic diagram of a grinding system for a lead screw nut disclosed in Embodiment 3 of the present invention at one angle;

[0043] Figure 5 This is a schematic diagram of the grinding system of the screw nut disclosed in the fourth embodiment of the present invention from another angle.

[0044] Description of the accompanying drawings:

[0045] A. Ultrasonic vibration atomization mechanism; 101. accommodating shell; 102. ultrasonic power supply; 103. transducer; 104. first rotating support; 105. bearing; 106. stopper sleeve; 107. first insulating component; 108. second insulating component; 109. first conductive slip ring; 110. second conductive slip ring; 111. first carbon brush; 112. first spring; 113. second carbon brush; 114. second spring; 115. first amplitude changer; 116. second amplitude changer; 1161. spiral groove; 117. mode conversion rod; 118. vibration absorption groove / hole; 119. vibration absorption cavity; 120. preload adjustment ring; 121. stator; 122. rotor; 123. grinding wheel rod;

[0046] 201, atomizing nozzle; 202, infusion rod; 203, infusion pump; 204, liquid storage tank; 205, flow meter; 206, flow regulating valve; 207, one-way valve; 208, rotary joint; 209, nozzle component; 210, cooling negative pressure device; 211, filter; 212, magnetic filter membrane; 213, cursor; 214, proximity sensor; 215, atomizing oblique small hole; 216, atomizing straight small hole;

[0047] B. Screw nut; C. Grinding wheel;

[0048] D, workpiece mechanism; 301, second rotating support; 302, clamping member; 303, annular groove;

[0049] E, propulsion mechanism; F, first turntable; G, longitudinal translation mechanism; H, internal grinding mechanism; I, internal thread grinding mechanism; J, second turntable; K, lifting mechanism; L, lateral translation mechanism; M, third turntable. DETAILED DESCRIPTION

[0050] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0051] Embodiment 1

[0052] See also Figure 1 and Figure 2 Shown is an embodiment of the ultrasonic vibration atomization mechanism of the present invention.

[0053] The ultrasonic vibration atomization mechanism A comprises a main body part and an atomization part;

[0054] The body part includes a housing 101, an ultrasonic power supply 102, a transducer 103 and a vibration module. The housing 101 is provided with a housing cavity. The housing cavity has a head end facing the negative direction of the X-axis and a terminal end facing the positive direction of the X-axis. The terminal end of the housing cavity is open. The ultrasonic power supply 102 is used to provide an electrical signal. The transducer 103 is arranged in the housing cavity. The transducer 103 is connected to the ultrasonic power supply 102 and is used to convert the electrical signal into a mechanical vibration of the same frequency. The vibration module has a head end facing the negative direction of the X-axis and a terminal end facing the positive direction of the X-axis. The head end of the vibration module is connected to the transducer 103, the terminal end of the vibration module is connected to the vibrated component, and the vibration module is connected to the housing 101.

[0055] The atomizing part includes an atomizing nozzle 201, an infusion rod 202, an infusion pump 203 and a liquid storage tank 204. The atomizing nozzle 201 is used to spray out a mist grinding fluid. The atomizing nozzle 201 is connected to the end of the vibration module. The infusion rod 202 is coaxially fixed inside the vibration module. One end of the infusion rod 202 is connected to the atomizing nozzle 201; the infusion pump 203 is used to transport the grinding fluid. The outlet of the infusion pump 203 is connected to the other end of the infusion rod 202 through an infusion pipeline. The liquid storage tank 204 is used to store the grinding fluid. The liquid storage tank 204 is connected to the inlet of the infusion pump 203.

[0056] The housing 101 serves as the installation base of the vibration module. The vibration module is installed on the inner side of the housing 101. The housing 101 is a cylinder, and the main body of the vibration module is a long rod extending along the X-axis direction. The ultrasonic power supply 102 is essentially a power generator, which generates a sinusoidal signal of a certain frequency and transmits it to the transducer 103 through a cable connection line. The transducer 103 then converts the electrical signal provided by the ultrasonic power supply 102 into a mechanical vibration of the same frequency, and finally transmits it to the vibrated component.

[0057] The left end of the above-mentioned atomizing nozzle 201 is connected to the vibration module, and the right end is a spherical body. The oil injection holes are distributed on the spherical surface in the same direction. Due to the high-frequency ultrasonic vibration of the spherical body at the right end, the grinding fluid is atomized to produce gaseous micro-particle cooling lubricating gas, which fills the inner hole of the hole-like workpiece and fully cools the grinding wheel. The generated micro-particle lubricating gas can increase the cooling effect and greatly reduce the dimensional error caused by the temperature rise during grinding. From a microscopic point of view, due to the microscopic separation effect and capillary effect generated by the high-frequency ultrasonic vibration between the hole-like workpiece and the grinding wheel, the lubricating gas really enters the front and rear corner edges of the abrasive particles, which fully lubricates and cools the abrasive particles, reduces the friction between the abrasive particles and the hole-like workpiece, further reduces the grinding force, and improves the grinding accuracy and stability. In addition, due to the high-frequency ultrasonic reciprocating vibration impact and full lubrication between the micro-units in the processing area of ​​the hole-like workpiece relative to the grinding wheel abrasive particles, the processed surface of the hole-like workpiece undergoes uniform micro-plastic flow, grain refinement, compressive stress, micro-hardness improvement, and fatigue life and corrosion resistance are greatly improved.

[0058] The infusion rod 202 passes through the vibration module, with one end extending out of the end surface of the first end of the vibration module and the other end extending out of the end surface of the rear end of the vibration module. The infusion rod 202 and the vibration module are relatively fixed and coaxially rotate synchronously. The atomization part also includes a flow display meter 205, a flow regulating valve 206 and a one-way valve 207 arranged on its infusion pipeline. The infusion rod 202 is connected to the infusion pipeline through a rotary joint 208, so that the infusion rod 202 and the infusion pipeline can both rotate relative to each other and flow grinding fluid.

[0059] On the one hand, the vibration module can drive the grinding wheel or workpiece to vibrate, meeting the high-precision, high-surface quality processing technology requirements and usage requirements of the internal thread profile of hole-type workpieces. On the other hand, the vibration module can drive the atomizing nozzle 201 to vibrate, so that the grinding fluid is atomized, which not only reduces the amount of grinding fluid used, but also produces a capillary effect between the abrasive and the workpiece, making it easier for the grinding fluid to enter between the abrasive and the workpiece, thereby improving the cooling and lubrication effect of the grinding fluid.

[0060] In this embodiment, the main body further includes a first rotating support 104 , and the accommodating shell is rotatably connected to the inner side of the first rotating support 104 around the X-axis direction.

[0061] The vibrated workpiece is a screw nut A, and the end of the vibration module is threadedly connected to the first end of the screw nut A. Specifically, the vibration module is threadedly connected to the screw nut A. When grinding the screw nut A, the screw nut A needs to rotate, so the vibration module must also be able to rotate with the screw nut A. At this time, by setting a first rotating support, the housing 101 is rotated, and the vibration module can be connected to the screw nut and rotate with the screw nut, and ultrasonic vibration is applied to the screw nut A. The rotation speed of the screw nut A is slow, and the size of the vibration module can be designed to be larger as needed, so that a small power supply can achieve the requirements of high frequency and large amplitude. Through ultrasonic-assisted grinding, the grinding force is greatly reduced, the grinding wheel blockage is reduced, the grinding wheel abrasive grains are kept sharp, and the surface finish, dimensional accuracy and shape and position accuracy of the workpiece are improved;

[0062] The body part further includes a bearing 105, a stopper sleeve 106, a first insulating component 107 and a second insulating component 108. The housing is connected to the inner side of the first rotating support 104 via the two bearings 105 arranged at a distance along the X-axis direction. The stopper sleeve 106 is disposed between the two bearings 105. The first insulating component 107 is connected to the end of the housing 101. The second insulating component 108 is connected to the end of the first rotating support 104.

[0063] The ultrasonic vibration assembly further includes a first conductive slip ring 109, a second conductive slip ring 110, a first carbon brush 111, a first spring 112, a second carbon brush 113, and a second spring 114. The first conductive slip ring 109 and the second conductive slip ring 110 are connected to the first insulating component 107. The first conductive slip ring 109 and the second conductive slip ring 110 are connected to the positive electrode and the negative electrode of the transducer 103 through a power line, respectively. The first carbon brush 111, the first spring 112, the second carbon brush 113, and the second spring 114 are connected to the second insulating component 108. The brush 111 is connected to the positive electrode of the ultrasonic power supply 102 through a power line, the second carbon brush 113 is connected to the negative electrode of the ultrasonic power supply 102 through a power line, the first spring 112 applies an elastic reset force to the first carbon brush 111, the first carbon brush 111 contacts the first conductive slip ring 109 under the elastic force of the first spring 112, the second spring 114 applies an elastic reset force to the second carbon brush 113, the second carbon brush 113 contacts the second conductive slip ring 110 under the elastic force of the second spring 114, and ensures that the vibration module and the ultrasonic power supply 102 can be electrically connected and relatively rotated. The vibration module in this embodiment drives the screw nut A to perform longitudinal and torsional vibration.

[0064] In this embodiment, the vibration module also includes a first amplitude transformer 115, a second amplitude transformer 116 and a modal decomposition rod 117. The first amplitude transformer 115 and the second amplitude transformer 116 are used to transmit and amplify the vibration amplitude. The modal conversion rod 117 is used to convert the longitudinal vibration into longitudinal torsional vibration, adjust vibration parameters and amplify the vibration amplitude. The first amplitude transformer 115 is connected to the transducer 103, the second amplitude transformer 116 is connected to the first amplitude transformer 115, one end of the modal conversion rod 117 is connected to the second amplitude transformer 116, and the other end is connected to the vibrated component.

[0065] The first amplitude transformer 115 and the second amplitude transformer 116 are important components of the vibration module, and their main function is to amplify the particle displacement or velocity of the mechanical vibration and concentrate the ultrasonic energy on a smaller area, i.e., to focus the energy. By setting a two-stage amplitude transformer, the amplitude can be better amplified, so that a low-power power supply can achieve a high frequency and large amplitude function. Specifically, the first amplitude transformer 115 is a trapezoidal quarter-wavelength amplitude transformer with an amplification factor of 1.8, and the second amplitude transformer 116 is a trapezoidal half-wavelength amplitude transformer with an amplification factor of 2.5. The mode conversion rod 117 is actually a shaft body, and a spiral groove is provided on the outer wall of the shaft body. The mode conversion rod 117 not only has the function of converting ultrasonic longitudinal vibration into longitudinal torsional vibration, but also has the function of ultrasonic parameter adjustment and ultrasonic amplitude amplification.

[0066] In this embodiment, the first amplitude changing rod 115 is integrally formed with a first supporting portion, and the second amplitude changing rod 116 is integrally formed with a second supporting portion, and both the first supporting portion and the second supporting portion are connected to the accommodating shell 101 .

[0067] The above-mentioned first support part and the above-mentioned second support part are both annular plates, and the above-mentioned annular plates are provided with vibration-damping and vibration-absorbing grooves / holes 118, that is, annular straight grooves (or inclined grooves), and evenly distributed small straight holes (or inclined holes) are arranged at the bottom thereof, and a vibration-damping and vibration-absorbing cavity 119 is formed between the above-mentioned first support part and the above-mentioned second support part.

[0068] The above-mentioned annular plate has a first plate surface and a second plate surface in the X-axis direction, and the first plate surface is arranged back to back to the second plate surface. The above-mentioned vibration-damping and vibration-absorbing groove / hole 118 includes an annular groove, and evenly distributed small through holes (straight or oblique) are arranged at the bottom thereof. The above-mentioned annular groove surrounds the X-axis direction. The cross-section of the above-mentioned annular groove can be a straight groove, or a cone with a wide groove opening and a narrow groove bottom. The above-mentioned evenly distributed small through holes are arranged at the groove bottom of the annular groove at intervals around the X-axis direction and penetrate the groove bottom of the annular groove. The groove openings of some of the above-mentioned annular grooves penetrate the first plate surface. At this time, the through holes also penetrate the second plate surface. The groove openings of some of the annular grooves penetrate the second plate surface. At this time, the through holes also penetrate the first plate surface. Due to the provision of the above-mentioned vibration reduction and absorption grooves / holes 118 and vibration reduction and absorption chambers 119, multi-dimensional vibration reduction and absorption are achieved, which can reduce / absorb high-frequency radial / circumferential / axial multi-dimensional vibrations from the ultrasonic system, and reduce / absorb low-frequency multi-dimensional vibrations from the bearings, and the tiny ultrasonic vibrations at the fixed points of the pitch circles of the primary amplitude variable vibrator 115 and the secondary amplitude variable vibrator 116 are not transmitted to the bearings. The ultrasonic device in this embodiment drives the screw nut A to perform ultrasonic longitudinal and torsional vibrations.

[0069] The first support part and the second support part define a straight line, which can improve the axial vibration accuracy of the vibration module and reduce the end face jump and axial total jump of the output end of the vibration module. The first support part is integrally formed with the first horn 115, and the second support part is integrally formed with the second horn 116, so that the entire vibration module can be installed in the installation hole.

[0070] In this embodiment, the second support portion is connected to the end surface of the mounting hole by bolts, and a preload adjustment ring 120 is provided between the second support portion and the end surface of the mounting hole. The axial preload is adjusted by adjusting the dimension of the preload adjustment ring 120 along the X-axis direction.

[0071] When the dimension of the preload adjustment ring 120 along the X-axis direction is small, the extrusion force between the first horn 115 and the second horn 116 is large, that is, the axial preload is large, so the load resistance of the vibration module is good. The load resistance of the vibration module can be adjusted by adjusting the preload adjustment ring 120.

[0072] In this embodiment, the infusion rod 202 is an externally threaded rod with a hollow channel, and the infusion rod 202 is threadedly connected to the inside of the vibration module.

[0073] The inner side of the vibration module is provided with a hollow channel, the hollow channel is provided with an internal thread, and the infusion rod 202 is threadedly connected to the hollow channel, so that the infusion rod 202 is easy to be disassembled, assembled and replaced.

[0074] In this embodiment, the atomization part also includes a suction nozzle component 209 and a cooling negative pressure device 210. The suction nozzle component 209 is arranged on the port side of the hole workpiece away from the vibration module. The suction nozzle component 209 is used to suck out the mist grinding fluid in the hole workpiece. The cooling negative pressure device 210 connects the suction nozzle component 209 and the liquid storage tank 204. The cooling negative pressure device 210 is used to provide negative pressure for the suction nozzle component 209 and cool and liquefy the sucked mist grinding fluid and return it to the liquid storage tank 204.

[0075] The suction nozzle component 209 is connected to the cooling negative pressure device 210 through the infusion pipeline, and the cooling negative pressure device 210 is connected to the liquid storage tank 204 through the infusion pipeline. The hot lubricating gas generated in the inner hole of the hole-like workpiece is quickly sucked away by the suction nozzle component set at the right end of the hole-like workpiece, which significantly reduces the grinding temperature. The lubricating gas with heat is converted into liquid through the cooling negative pressure device 210 and returned to the liquid storage tank through the infusion pipeline.

[0076] In this embodiment, the above-mentioned liquid storage tank 204 includes a clean oil area and an oil return area. The above-mentioned clean oil area is connected to the above-mentioned infusion pump 203, and the above-mentioned oil return area is connected to the above-mentioned cooling negative pressure device 210. A filter 211 and a magnetic filter membrane 212 are provided between the above-mentioned oil return area and the above-mentioned clean oil area.

[0077] The grinding fluid in the oil return area passes through the filter 211 and the magnetic filter membrane 212 to remove impurities, enters the clean oil area, and is reused. The above oil return area is also provided with a cursor 213 and a proximity sensor 214.

[0078] Embodiment 2

[0079] See also Figure 3 , an embodiment of the ultrasonic vibration atomization mechanism of the present invention. The rest is the same as the first embodiment, except that: in this embodiment, the vibration module does not include the mode conversion rod, a spiral groove 1161 is provided on the second amplitude rod 116, and the ultrasonic longitudinal vibration is converted into longitudinal torsional vibration.

[0080] A stator 121 is provided on the inner side of the first rotating support 104, and a rotor 122 is provided on the outer side of the accommodating shell 101. The stator 121 interacts with the rotor 122 to drive the accommodating shell 101 to rotate. The first rotating support 104, the accommodating shell 101, the stator 121 and the rotor 122 form an electric spindle. The vibration module also includes a grinding wheel rod 123 located at its end and used to connect the grinding wheel C.

[0081] The housing 101 is the rotating shaft of the electric spindle, the first rotating support 104 is the housing of the electric spindle, the rear end of the second amplitude change rod 116 is fixedly connected to the grinding wheel rod 123 by a heat shrink process, and the grinding wheel C is glued to the grinding wheel rod 123. The atomizing nozzle 201 is located on one side of the grinding wheel C, and the grinding wheel rod 123 is also provided with an atomizing oblique hole 215 and an atomizing straight hole 216 located on the other side of the grinding wheel C. The atomizing oblique hole 215 and the atomizing straight hole 216 are used to spray the grinding fluid. The atomizing oblique hole 215 forms an acute angle with the axial direction of the grinding wheel rod 123, and the atomizing straight hole 216 is perpendicular to the axial direction of the grinding wheel rod 123. In this embodiment, the ultrasonic vibration mechanism drives the grinding wheel C to torsional vibration.

[0082] Embodiment 3

[0083] See also Figure 4 and Figure 5 , an embodiment of the grinding system of the screw nut in the present invention

[0084] The grinding system of the screw nut comprises:

[0085] In the ultrasonic vibration atomization mechanism A in the first embodiment, the first rotating support 104 and the accommodating housing are unlockably locked by a locking component; the transducer 103 is connected to the ultrasonic power supply 102; the end of the vibration module is threadedly connected to the screw nut B;

[0086] The workpiece mechanism D comprises a second rotating support 301, a clamping component 302 and a rotation driving device (not shown in the figure), wherein the clamping component 302 is rotatably connected to the inner side of the second rotating support 301 around the X-axis direction, and is used to fix the screw nut A and keep the axial direction of the screw nut A in the X-axis direction, and the rotation driving device is used to drive the clamping component 302 to rotate around the X-axis direction;

[0087] A propulsion mechanism E, the propulsion mechanism E is used to drive the ultrasonic vibration atomization mechanism A to translate along the X-axis direction;

[0088] A first turntable F, the first turntable F is used to drive the workpiece mechanism D to rotate around the Y-axis direction;

[0089] Longitudinal translation mechanism G; the longitudinal translation mechanism G is used to drive the ultrasonic vibration atomization mechanism and the workpiece mechanism D to translate along the X-axis direction;

[0090] An internal grinding mechanism H, the internal grinding mechanism H is connected to the internal grinding wheel and drives the internal grinding wheel to rotate around the X-axis direction;

[0091] Internal thread grinding mechanism I, the internal thread grinding mechanism I is connected to the internal thread grinding wheel and drives the internal thread grinding wheel to rotate around the X-axis direction;

[0092] A second turntable J, the second turntable J is used to drive the internal thread grinding mechanism I to rotate around the Z axis;

[0093] A lifting mechanism K, the lifting mechanism K is used to drive the internal thread grinding mechanism I to move up and down along the Y-axis direction;

[0094] A lateral translation mechanism L, the lateral translation mechanism L is used to drive the internal grinding mechanism H and the internal thread grinding mechanism I to translate along the Z-axis direction;

[0095] The ultrasonic vibration atomization mechanism A is arranged on one side of the workpiece mechanism D in the X-axis direction;

[0096] The internal grinding mechanism H and the internal thread grinding mechanism I are arranged at a distance along the Z-axis direction and are both arranged on the other side of the workpiece mechanism D in the X-axis direction.

[0097] The internal grinding mechanism H is used to grind the crest of the thread, and the internal thread grinding mechanism I is used to grind the groove of the thread. When the internal thread grinding mechanism is working, the second turntable J rotates to the required thread lead angle and maintains this angle, while the joint lifting mechanism K rises or descends to a specified height to ensure that the center height of the grinding wheel remains unchanged, and the internal thread grinding is performed.

[0098] Before processing, the end of the vibration module is first connected to the first end of the screw nut A. The steps are as follows: the first rotating support and the accommodating shell are locked as a whole by a locking component (the accommodating shell cannot rotate relative to the first rotating support 104). At this time, the end of the vibration module cannot rotate. The above-mentioned propulsion mechanism E drives the ultrasonic vibration atomization mechanism to approach the screw nut A along the X-axis direction. At the same time, the workpiece mechanism D drives the screw nut A to rotate, and the external thread of the end of the vibration module is connected to the internal thread of the screw nut A. When the propulsion mechanism E is in place, the system sends a signal to the locking component, and the first rotating support 104 and the accommodating shell are unlocked. The accommodating shell can rotate with the rotating screw nut A. At this time, the second end of the screw nut A can be ground.

[0099] When processing the second end of the screw nut A, the steps are as follows: the lateral translation mechanism L first drives the internal grinding mechanism H to face the second end of the screw nut A, and the internal grinding mechanism H can first process the screw nut A. During the processing, the workpiece mechanism D drives the screw nut A to rotate around the X-axis direction, the longitudinal translation mechanism G drives the screw nut A to translate along the X-axis direction, and the internal grinding mechanism H drives the internal grinding wheel to rotate around the X-axis direction. At the same time, the internal grinding wheel performs a spiral motion relative to the screw nut. After the internal circle grinding of the screw nut is completed, the second turntable J and the lifting mechanism K adjust the internal thread grinding wheel to the set spiral angle and height, the lateral translation mechanism L drives the internal thread grinding mechanism I to face the second end of the screw nut A, the workpiece mechanism D drives the screw nut A to rotate around the X-axis direction, the longitudinal translation mechanism G drives the screw nut A to translate along the X-axis direction, the internal thread grinding mechanism I drives the internal thread grinding wheel to rotate around the X-axis direction, and at the same time, the internal thread grinding wheel performs a spiral motion relative to the screw nut A to complete the inner circle and internal thread grinding of the second end of the screw nut A.

[0100] After the first end of the screw nut A is processed, the end of the vibration module is separated from the screw nut A. The steps are as follows: the end of the vibration module is connected to the screw nut A, and the first rotating support and the accommodating shell are locked as a whole through the locking component (the accommodating shell cannot rotate relative to the first rotating support 104). The above-mentioned propulsion mechanism E drives the ultrasonic vibration atomization mechanism away from the screw nut A along the X-axis direction, and the workpiece mechanism D drives the screw nut A to rotate. When the propulsion mechanism E retreats into place, the system gives a signal in place, and the external thread of the end of the vibration module is separated from the internal thread of the screw nut A. At this time, the first turntable F drives the workpiece mechanism D to rotate 180°. After the first turntable rotates 180° into place, the system gives a signal. At this time, the end of the vibration module is connected to the second end of the screw nut A according to the above steps. At this time, the first end of the screw nut A can be ground according to the above steps.

[0101] Specifically, the locking component is a hydraulic locking component. The propulsion mechanism E includes a propulsion drive device and a propulsion guide rail. The propulsion drive device is an electric hydrostatic actuator, which slides on the propulsion guide rail (linear guide rail) and is equipped with a force control feedback system. The output force can be adjusted in real time to achieve constant force output, ensuring that the ultrasonic vibration atomization mechanism is connected to the screw nut A smoothly and effectively; the propulsion mechanism E is also equipped with a position detection component, which can provide a position signal to control the clamping and loosening of the locking component, that is, the locking and unlocking of the first rotating support 104 and the accommodating shell. Thereby, the automatic disassembly and assembly of the screw nut A and the vibration module are realized. The clamping component 302 is connected to the second rotating support 301 through a bearing. The clamping component 302 is a hydraulic clamping component. When used for grinding, the hydraulic clamping mechanism clamps the screw nut A through a convex ring set at two nodes, which can provide a maximum stable clamping force of 7MPa. The rotation drive device is a servo motor. The second rotating support 301 is installed on the first turntable F, and the second rotating support 301 is driven by the first turntable F to rotate around the Y axis. The hydraulic clamping component is a hydraulic tensioning vibration absorbing sleeve, and the inner hole of the hydraulic tensioning vibration absorbing sleeve is provided with staggered annular grooves 303, and the end face of the hydraulic tensioning vibration absorbing sleeve is provided with a blind hole, forming a hydraulic tensioning vibration absorbing sleeve with axial vibration reduction, circumferential vibration reduction and hydraulic vibration reduction and vibration absorption functions, ensuring that the ultrasonic vibration generated on the screw nut A cannot be transmitted to the bearing of the workpiece mechanism, avoiding micro-wear of the bearing and reducing the rotation accuracy. The first turntable F is equipped with a large torque, high rigidity, and high positioning accuracy servo motor, which can achieve a positioning accuracy of less than 10Arcsec, effectively ensuring the precise positioning of the workpiece mechanism D after rotating 180°. The internal cylindrical grinding wheel and the internal thread grinding wheel both include a high-speed electric spindle, and the electric spindle drives the grinding wheel for grinding. The electric spindle can achieve a maximum speed of 60,000 rpm, and uses oil-gas lubrication and water cooling to effectively ensure the accuracy and end face runout of the spindle. The second turntable J is installed on the column, and a roller linear guide is installed on the column. The box where the second turntable J is located is dragged by the lifting mechanism K on the linear guide, and performs linear reciprocating motion in the vertical direction along the Y-axis direction. The lifting mechanism K includes key components such as roller screws, servo drive motors, and bearings. It adopts a fixed installation method at both ends. The screw is pre-stretched during assembly, which can effectively reduce the adverse effects of thermal temperature rise on the accuracy of the screw and ensure the operation accuracy of the screw. The above-mentioned lifting mechanism K and the above-mentioned lateral translation mechanism L are equipped with absolute linear grating scales with a measuring step of 0.001μm, forming a closed-loop system with the lifting mechanism K and the lateral translation mechanism to ensure the precise positioning of each axis movement.The above-mentioned absolute linear grating ruler (measuring component) is driven by an electric hydrostatic actuator. The electric hydrostatic actuator has a force control device inside, which can output a constant ejection force to protect (the measuring component) from damage caused by sudden impact. When the measuring component is working, the electric hydrostatic actuator ejects the measuring component, measures the required point coordinates, and feeds back to the machine tool system. After completing the measuring action, the electric hydrostatic actuator retracts the measuring component and hides it behind the sheet metal to protect the measuring component from damage by cutting fluid or other debris.

[0102] In this embodiment, the tool unit further includes a third turntable M, and the third turntable M is used to drive the inner grinding mechanism H to rotate around the Y-axis direction.

[0103] When the internal thread grinding mechanism I is processing, the internal cylindrical grinding mechanism H may interfere with the workpiece mechanism D. At this time, the internal cylindrical grinding mechanism H is driven by the third turntable M to rotate 90° counterclockwise to avoid the interference position.

[0104] Embodiment 4

[0105] The rest is the same as Example 3, except that: no ultrasonic vibration atomization mechanism is set on the X-axis side of the above-mentioned workpiece mechanism, the above-mentioned internal cylindrical grinding mechanism and the above-mentioned internal thread grinding mechanism are both the ultrasonic vibration atomization mechanism in Example 2, the end of the vibration module of the above-mentioned internal cylindrical grinding mechanism is connected to the above-mentioned internal cylindrical grinding wheel, and the end of the vibration module of the above-mentioned internal thread grinding mechanism is connected to the above-mentioned internal thread grinding wheel.

[0106] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. An ultrasonic vibration atomization mechanism, characterized in that: It includes a main body part and an atomizing part; The body part includes a housing, an ultrasonic power supply, a transducer and a vibration module. The housing is provided with a housing cavity, the housing cavity has a head end facing the negative direction of the X-axis and a terminal end facing the positive direction of the X-axis, the terminal end of the housing cavity is open, the ultrasonic power supply is used to provide an electrical signal, the transducer is arranged in the housing cavity, the transducer is connected to the ultrasonic power supply and is used to convert the electrical signal into a mechanical vibration of the same frequency; the vibration module has a head end facing the negative direction of the X-axis and a terminal end facing the positive direction of the X-axis, the head end of the vibration module is connected to the transducer, the terminal end of the vibration module is connected to the vibrated component, and the vibration module is connected to the housing; The atomizing part includes an atomizing nozzle, an infusion rod, an infusion pump and a liquid storage tank. The atomizing nozzle is used to spray a mist-like grinding fluid. The atomizing nozzle is connected to the end of the vibration module. The infusion rod is coaxially fixed inside the vibration module. One end of the infusion rod is connected to the atomizing nozzle. The infusion pump is used to transport the grinding fluid. The outlet of the infusion pump is connected to the other end of the infusion rod through an infusion pipeline. The liquid storage tank is used to store grinding fluid, and the liquid storage tank is connected to the inlet of the infusion pump through an infusion pipeline.

2. The ultrasonic vibration atomization mechanism according to claim 1, characterized in that: The infusion rod is an externally threaded rod with a hollow channel, and the infusion rod is threadedly connected to the inside of the vibration module.

3. The ultrasonic vibration atomization mechanism according to claim 1, characterized in that: The atomization part also includes a suction nozzle component and a cooling negative pressure device. The suction nozzle component is arranged on the port side of the hole workpiece away from the vibration module. The suction nozzle component is used to suck out the mist grinding fluid in the hole workpiece. The cooling negative pressure device connects the suction nozzle component and the liquid storage tank. The cooling negative pressure device is used to provide negative pressure for the suction nozzle component and cool and liquefy the sucked mist grinding fluid and return it to the liquid storage tank.

4. The ultrasonic vibration atomization mechanism according to claim 3, characterized in that: The liquid storage tank includes an oil return area and an oil clean area. The oil return area is connected to the cooling negative pressure device, and the oil clean area is connected to the infusion pump. A filter and a magnetic filtration membrane are provided between the oil return area and the oil clean area.

5. The ultrasonic vibration atomization mechanism according to claim 1, characterized in that: The vibration module includes a first amplitude transformer, a second amplitude transformer and a mode conversion rod. The first amplitude transformer and the second amplitude transformer are used to transmit and amplify the vibration amplitude. The mode conversion rod is used to decompose the longitudinal vibration into longitudinal vibration and torsional vibration, adjust vibration parameters and amplify the vibration amplitude. The first amplitude transformer is connected to the transducer, the second amplitude transformer is connected to the first amplitude transformer, one end of the mode conversion rod is connected to the second amplitude transformer, and the other end is connected to the vibrated component.

6. The ultrasonic vibration atomization mechanism according to claim 5, characterized in that: The first amplitude changing rod is integrally formed with a first supporting portion, and the second amplitude changing rod is integrally formed with a second supporting portion, and both the first supporting portion and the second supporting portion are connected to the accommodating shell.

7. The ultrasonic vibration atomization mechanism according to any one of claims 1 to 6, characterized in that: The main body portion further includes a first rotating support, and the accommodating shell is rotatably connected to the inner side of the first rotating support around the X-axis direction.

8. The ultrasonic vibration atomization mechanism according to claim 7, characterized in that: A stator is provided on the inner side of the first rotating support, and a rotor is provided on the outer side of the accommodating shell. The stator and the rotor interact with each other to drive the accommodating shell to rotate. The first rotating support, the accommodating shell, the stator and the rotor constitute an electric spindle, and the end of the vibration module is connected to a grinding wheel rod.

9. A grinding system for a screw nut, characterized in that: include: The ultrasonic vibration atomization mechanism of claim 7, wherein the first rotating support and the accommodating housing are unlockably locked by a locking component, and the end of the vibration module is threadedly connected to a screw nut; A workpiece mechanism, the workpiece mechanism comprising a second rotating support, a clamping component and a rotating drive device, the clamping component is rotatably connected to the inner side of the second rotating support around the X-axis direction, and is used to fix the screw nut and keep the axial direction of the screw nut in the X-axis direction, and the rotating drive device is used to drive the clamping component to rotate around the X-axis direction; A propulsion mechanism, the propulsion mechanism is used to drive the ultrasonic vibration atomization mechanism to translate along the X-axis direction; A first turntable, the first turntable is used to drive the workpiece mechanism to rotate around the Y-axis direction; A longitudinal translation mechanism, the longitudinal translation mechanism is used to drive the ultrasonic vibration atomization mechanism and the workpiece mechanism to translate along the X-axis direction; An internal grinding mechanism, the internal grinding mechanism is connected to the internal grinding wheel and drives the internal grinding wheel to rotate around the X-axis direction; An internal thread grinding mechanism, wherein the internal thread grinding mechanism is connected to an internal thread grinding wheel and drives the internal thread grinding wheel to rotate around the X-axis direction; A second turntable, the second turntable is used to drive the internal thread grinding mechanism to rotate around the Z-axis direction; A lifting mechanism, the lifting mechanism is used to drive the internal thread grinding mechanism to move up and down along the Y-axis direction; A lateral translation mechanism, the lateral translation mechanism is used to drive the internal grinding mechanism and the internal thread grinding mechanism to translate along the Z-axis direction; Among them, the ultrasonic vibration atomization mechanism is arranged on one side of the workpiece mechanism in the X-axis direction; the internal cylindrical grinding mechanism and the internal thread grinding mechanism are arranged at intervals along the Z-axis direction and are both arranged on the other side of the workpiece mechanism in the X-axis direction.

10. A grinding system for a screw nut, characterized in that: include: A workpiece mechanism, the workpiece mechanism comprising a second rotating support, a clamping component and a rotating drive device, the clamping component is rotatably connected to the inner side of the second rotating support around the X-axis direction, and is used to fix the screw nut and keep the axial direction of the screw nut in the X-axis direction, and the rotating drive device is used to drive the clamping component to rotate around the X-axis direction; A first turntable, the first turntable is used to drive the workpiece mechanism to rotate around the Y-axis direction; A longitudinal translation mechanism, the longitudinal translation mechanism is used to drive the workpiece mechanism to translate along the X-axis direction; An internal grinding mechanism, the internal grinding mechanism is connected to the internal grinding wheel and drives the internal grinding wheel to rotate around the X-axis direction; An internal thread grinding mechanism, wherein the internal thread grinding mechanism is connected to an internal thread grinding wheel and drives the internal thread grinding wheel to rotate around the X-axis direction; A second turntable, the second turntable is used to drive the internal thread grinding mechanism to rotate around the Z-axis direction; A lifting mechanism, the lifting mechanism is used to drive the internal thread grinding mechanism to move up and down along the Y-axis direction; A lateral translation mechanism, the lateral translation mechanism is used to drive the internal grinding mechanism and the internal thread grinding mechanism to translate along the Z-axis direction; Wherein, the internal cylindrical grinding mechanism and the internal thread grinding mechanism are arranged at a distance along the Z-axis direction and are both arranged on the same side of the X-axis direction of the workpiece mechanism, the internal cylindrical grinding mechanism and the internal thread grinding mechanism are both the ultrasonic vibration atomization mechanism as described in claim 8, the end of the vibration module of the internal cylindrical grinding mechanism is connected to the internal cylindrical grinding wheel, and the end of the vibration module of the internal thread grinding mechanism is connected to the internal thread grinding wheel.

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