Search

CN-121733029-B - Ultrasonic auxiliary rotary workbench with micro-texture tooth surface and laser processing device

CN121733029BCN 121733029 BCN121733029 BCN 121733029BCN-121733029-B

Abstract

The invention discloses a tooth surface micro-texture ultrasonic auxiliary rotary workbench and a laser processing device, wherein the tooth surface micro-texture ultrasonic auxiliary rotary workbench comprises a shell component, a stator component, a rotor component, a clamping component and an ultrasonic vibration component, and the shell component is provided with a rotating cavity; the stator assembly is arranged in the rotating cavity, the rotor assembly is opposite to the stator assembly and is arranged at intervals, the stator assembly surrounds the rotor assembly, the rotor assembly can rotate around the first direction relative to the stator assembly, the clamping assembly is connected with the rotor assembly in a transmission mode and can rotate along with the rotor assembly, the clamping assembly is used for fixing a gear, the ultrasonic vibration assembly is arranged between the rotor assembly and the clamping assembly, and the ultrasonic vibration assembly is used for enabling the clamping assembly to vibrate in the first direction in an ultrasonic mode at a preset frequency. The invention can improve the processing efficiency and the processing quality of the tooth surface micro-texture and is applied to the technical field of gear surface processing.

Inventors

  • Zou Runxiang
  • ZHOU WEIHUA
  • TANG JINYUAN
  • HE YUHUI

Assignees

  • 中南大学

Dates

Publication Date
20260512
Application Date
20260228

Claims (7)

  1. 1. The utility model provides a tooth surface micro-texture supersound auxiliary rotary worktable which characterized in that includes: A housing assembly (100) having a rotation chamber (101); a stator assembly (200) disposed within the rotation chamber (101); The rotor assembly (300) is arranged in the rotating cavity (101), the rotor assembly (300) is opposite to the stator assembly (200) and is arranged at intervals, the stator assembly (200) surrounds the rotor assembly (300), and the rotor assembly (300) can rotate relative to the stator assembly (200) around a first direction; A clamping assembly (400) drivingly connected to the rotor assembly (300) and capable of rotating with the rotor assembly (300), the clamping assembly (400) being adapted to secure a gear; An ultrasonic vibration assembly (500) disposed between the rotor assembly (300) and the clamping assembly (400), the ultrasonic vibration assembly (500) being configured to ultrasonically vibrate the clamping assembly (400) in the first direction at a preset frequency; The ultrasonic vibration assembly (500) comprises a plurality of ultrasonic transducers (510) and elastic force-equalizing plates (520), wherein the ultrasonic transducers (510) are sequentially distributed along the circumference surrounding the first direction, the ultrasonic transducers (510) are connected between the rotor assembly (300) and the elastic force-equalizing plates (520) so that the elastic force-equalizing plates (520) vibrate in an ultrasonic manner along the first direction, and the elastic force-equalizing plates (520) are connected with the clamping assembly (400) and can transmit ultrasonic vibration along the first direction to the clamping assembly (400); The elastic force equalizing plate (520) comprises a connecting ring part (521), a central ring part (522) and a plurality of connecting arm parts (523), wherein the connecting ring part (521) surrounds the central ring part (522), the plurality of connecting arm parts (523) are sequentially distributed along the circumferential direction and are connected between the connecting ring part (521) and the central ring part (522), and the central ring part (522) is connected with the clamping assembly (400); The connecting arm parts (523) are arranged along an Archimedes spiral line direction, a plurality of connecting arm parts (523) are spirally distributed along a clockwise direction, and the rotor assembly (300) rotates relative to the stator assembly (200) along the clockwise direction; Or, the connecting arm portions (523) are arranged along an archimedes spiral line direction, a plurality of connecting arm portions (523) are spirally distributed along a counterclockwise direction, and the rotor assembly (300) rotates relative to the stator assembly (200) along the counterclockwise direction.
  2. 2. The ultrasonic-assisted rotary table for tooth surface microtexturing according to claim 1, wherein the rotor assembly (300) is electrically connected to the ultrasonic vibration assembly (500), the rotor assembly (300) comprises a first coil assembly (310) and a second coil assembly (320), the first coil assembly (310) and the second coil assembly (320) are arranged at intervals along the first direction, the first coil assembly (310) and the second coil assembly (320) are rotatable relative to the stator assembly (200) around the first direction, and the second coil assembly (320) is electrically connected to the ultrasonic vibration assembly (500).
  3. 3. The ultrasonic-assisted rotary table for tooth surface microtexturing according to claim 2, wherein the stator assembly (200) comprises a first compensator (210), the rotor assembly (300) comprises a second compensator, the first compensator (210) surrounds the first coil assembly (310), the first compensator (210) is in wireless electrical connection with the first coil assembly (310), the second compensator surrounds the second coil assembly (320), and the second compensator is electrically connected between the ultrasonic vibration assembly (500) and the second coil assembly (320).
  4. 4. The tooth-surface microtextured ultrasonic-assisted rotary table of claim 1, wherein: The shell assembly (100) comprises a base (110) and a side shell (120), the base (110) is connected with the side shell (120), and the base (110) and the side shell (120) are surrounded to form the rotating cavity (101); The rotor assembly (300) comprises a coil frame (330), a central shaft (340) and a coil winding (350), one end of the central shaft (340) penetrates through the base (110) and is rotationally connected with the base (110), the coil frame (330) is arranged in the rotating cavity (101) and is connected with the central shaft (340), and the coil winding (350) is connected with the coil frame (330); The clamping assembly (400), the ultrasonic vibration assembly (500) are each connected to the coil former (330) and/or the central shaft (340).
  5. 5. The ultrasonic-assisted rotary table according to claim 4, wherein the central shaft (340) comprises a first limiting portion (341), a shaft portion (342) and a second limiting portion (343), the shaft portion (342) sequentially penetrates through the base (110), the rotor assembly (300), the ultrasonic vibration assembly (500) and the clamping assembly (400) along the first direction, the first limiting portion (341) is arranged on one side, far away from the rotor assembly (300), of the base (110), the second limiting portion (343) is arranged on one side, far away from the ultrasonic vibration assembly (500), of the clamping assembly (400), the first limiting portion (341) and the second limiting portion (343) are used for limiting the base (110), the rotor assembly (300), the ultrasonic vibration assembly (500) and the clamping assembly (400) along the first direction, and the first limiting portion (341) and/or the second limiting portion (343) is detachably connected to the shaft portion (342).
  6. 6. The tooth-surface microtextured ultrasonic-assisted rotary table of claim 5, wherein the rotor assembly (300) further comprises a first bearing (360) and a second bearing (370), the first bearing (360) being disposed between the first limit portion (341) and the base (110), the second bearing (370) being disposed between the bobbin (330) and the base (110), the ultrasonic vibration assembly (500) comprising an elastic assembly (380); Wherein the first limit part (341), the base (110), the first bearing (360), the second bearing (370), the coil former (330), the elastic component (380), the clamping component (400) and the second limit part (343) are sequentially abutted along the first direction; The elastic assembly (380) comprises a first elastic piece, an elastic force-equalizing plate (520) and a second elastic piece which are sequentially abutted along the first direction, or the first elastic piece and the elastic force-equalizing plate (520) which are sequentially abutted along the first direction, or the elastic force-equalizing plate (520) and the second elastic piece which are sequentially abutted along the first direction.
  7. 7. A laser processing device is characterized by comprising the tooth surface micro-texture ultrasonic auxiliary rotary workbench according to any one of claims 1 to 6.

Description

Ultrasonic auxiliary rotary workbench with micro-texture tooth surface and laser processing device Technical Field The invention relates to the technical field of gear surface machining, in particular to a tooth surface micro-texture ultrasonic auxiliary rotary workbench and a laser machining device. Background In the tip field of modern mechanical engineering, such as high-speed power assemblies of new energy automobiles, accessory transmission systems of aeroengines and precision reducers of industrial robots, gears are used as core transmission elements, and the performance limits of the gears directly restrict the efficiency, service life and noise vibration roughness performance of the whole machine. With the continuous increase of the power density, the contact stress born by the working face of the gear is increasingly increased, and the traditional tooth surface machining process (such as tooth grinding and tooth honing) can ensure the macroscopic geometric precision of the micron level, but the traditional tooth grinding process is close to the physical limits of the material removal rate and the surface integrity. Tribology researches show that the friction lubrication state of the interface can be remarkably improved by introducing micro-textures with specific geometric characteristics, sizes and distribution rules on the surface of the kinematic pair. The micro-texture (such as micro pits, micro grooves, herringbone grooves and the like) can play the key roles of 1. The micro-texture is used as a micro fluid bearing under the high-speed running, and can generate additional hydrodynamic lifting force under the edge working condition of oil film rupture, so that the oil film bearing capacity is improved, the direct contact between metals is reduced, 2. The micro-oil pool effect is that lubricating oil stored in the micro-texture can be released to a contact area to provide secondary lubrication to prevent gluing and scratching under the start-stop stage or lean working condition, and 3. The abrasive particle capturing effect is that the micro-texture can contain particles generated by abrasion, so that the plow action of abrasive particles on a contact interface is reduced, and the abrasive particle abrasion is reduced. However, the preparation of tooth surface microtexture presents extremely severe challenges. First, gear tooth surfaces (particularly spiral bevel gears, hyperboloid gears) are extremely complex free-form surfaces with a radius of curvature that varies with the meshing position, requiring that the machining tool have extremely high multi-axis linkage following capability. Second, to achieve significant tribological effects, the size of the microtexture is typically on the order of microns to tens of microns, with high demands on the aspect ratio to ensure oil storage and long-term performance. In the related art, the micro-texture processing means mainly comprise photoetching electrolysis, micro electric spark, mechanical imprinting and laser processing. The femtosecond laser removes materials by virtue of the ultra-short pulse width and the extremely high peak power of the femtosecond laser, and the material is removed by a cold working mechanism (mainly coulomb explosion and extremely little hot melting), so that the femtosecond laser becomes an ideal tool for preparing the micro-texture of high-hardness tooth surfaces (such as carburized quenched steel and nitrided steel). Although femtosecond lasers have theoretical advantages, in actual deep texture processing of tooth surfaces, the existing industrial equipment and technical scheme still have the defects that cannot be ignored: 1. The light shielding and chip removing bottleneck in deep hole machining is that when femtosecond laser ablates a micro pit or micro groove with a larger deep diameter on a tooth surface, a material is gasified or ionized into a plasma plume instantaneously, and a large amount of nano particles are sputtered, so that the sprayed substances are difficult to diffuse rapidly inside a narrow micropore structure, high-density plasma clouds are formed above an orifice or stacked on the bottom and the side wall of the hole, the retained plasma clouds absorb and scatter laser pulse energy which is incident subsequently, the effective energy density reaching the surface of the material is reduced sharply, the machining efficiency (saturation depth effect) is greatly reduced, the shape of the machined bottom surface is deteriorated, and the situation of overlarge taper or bottom distortion occurs; 2. The undischarged slag and nano particles can be reattached to the inside or the edge of the micro-texture under the action of gravity or electrostatic adsorption, and a hard recast layer is formed after cooling, so that the geometric precision of the micro-texture is damaged, and the recast layer is often accompanied with tensile stress and microscopic cracks to become a source of fatigue failure of gear contact;