Contact type electric energy transmission ultrasonic machine tool machining device

Abstract

The utility model discloses a contact type electric energy transmission ultrasonic machine tool machining device which comprises a machine tool electric spindle, an ultrasonic cutter handle, an ultrasonic cutter, a support and a conductive assembly, the ultrasonic cutter handle is provided with two copper rings which are electrically connected to an ultrasonic vibrator of the ultrasonic cutter, and the conductive assembly is installed on the lower portion of the support and comprises two carbon fiber bundles. The two carbon fiber bundles are in contact with the two copper rings respectively; the ultrasonic knife handle comprises a blind rivet, a knife handle body, an insulating sleeve and two copper rings. The ultrasonic tool comprises an ultrasonic vibrator, an ER chuck and a tool body. The ER chuck comprises an ER nut and an ER collet. According to the contact type electric energy transmission ultrasonic machine tool machining device, the carbon fiber bundle is arranged to make contact with the copper ring to supply power to the ultrasonic vibrator, the carbon fiber bundle is arranged to be in a brush shape, and when the ultrasonic cutter handle rotates at a high speed, the carbon fiber bundle sweeps the surface of the copper ring to achieve electric energy transmission; and the carbon fiber bundles can always keep good contact with the copper rings, so that the purposes of reducing abrasion and improving the stability of electric energy transmission are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ultrasonic machine tool processing technical field, especially relates to a contact type electric energy transmission ultrasonic machine tool processing device. BACKGROUND

[0002] Ultrasonic vibration assisted machine tool processing, such as ultrasonic vibration assisted milling, can improve the processing surface quality and processing efficiency. Ultrasonic vibration assisted milling is based on traditional milling, and by applying ultrasonic frequency vibration on the tool or workpiece, the cutting edge completes the cutting process in a very short time, thereby changing the cutting mechanism. This technology can significantly reduce the cutting force, reduce tool wear, prolong tool life, and improve the processing surface quality and processing efficiency. Ultrasonic vibration assisted milling technology is widely used in cutting processing of difficult-to-machine materials, such as titanium alloy, high-temperature alloy, etc., as well as precision mold manufacturing and complex curved surface processing fields.

[0003] Because the milling tool rotates at high speed during ultrasonic milling processing, the ultrasonic transducer applied to the tool vibration milling processing is also in a high-speed rotating state during work. For high-speed rotating load power supply, conductive slip ring and inductive conductive two ways can be usually adopted. However, under high-speed rotation, the conductive slip ring wears very severely and is not suitable for power supply to the ultrasonic transducer in milling processing. The transmission efficiency of inductive conductive is affected by various factors, such as electromagnetic coupling degree, load change, etc., which may cause unstable power transmission.

[0004] It can be seen that the prior art needs to be improved and improved. INVENTION CONTENTS

[0005] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a contact type electric energy transmission ultrasonic machine tool processing device, which aims to solve the technical problems of unstable power supply transmission of the ultrasonic transducer and easy wear of the conductive part in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A contact type electric energy transmission ultrasonic machine tool processing device, comprising: a machine tool electric spindle, an ultrasonic tool holder, an ultrasonic tool, a bracket and a conductive assembly, the machine tool electric spindle is drivingly connected to the ultrasonic tool holder, the lower end of the ultrasonic tool holder is connected to the upper end of the ultrasonic tool, the bracket is installed on the outside of the machine tool electric spindle, and the conductive assembly is installed on the lower end of the bracket.

[0008] The ultrasonic tool holder comprises a pull pin, a tool holder, an insulating sleeve and two copper rings, the pull pin is connected to the upper end of the tool holder, the insulating sleeve is fixedly sleeved on the outside of the lower end of the tool holder, the two copper rings are respectively sleeved on the outside of the insulating sleeve and are insulated from each other through the insulating sleeve, and the lower part of the tool holder is provided with a cavity for accommodating an ultrasonic vibrator.

[0009] The insulating sleeve comprises a mounting section and a connecting section, the mounting section is two, two mounting sections are respectively arranged at both ends of the connecting section, the outer diameter of the mounting section is smaller than the outer diameter of the connecting section, the mounting section is used for mounting the copper ring, and the connecting section is used for mounting the screw and the shank fixed connection;

[0010] The ultrasonic tool comprises an ultrasonic vibrator, an ER chuck and a tool, the positive electrode and the negative electrode of the ultrasonic vibrator are respectively electrically connected to two copper rings, and the tool is connected to the lower end of the ultrasonic vibrator through the ER chuck;

[0011] The ER chuck comprises an ER nut and an ER collet, the ER collet is connected to the upper end of the tool, the lower end of the ER collet is connected to the ER nut, the upper end of the ER collet is connected to the inner side of the lower end of the ultrasonic vibrator, and the ER nut is connected to the outer side of the lower end of the ultrasonic vibrator;

[0012] The conductive assembly comprises two carbon fiber bundles, the two carbon fiber bundles are respectively electrically connected to the positive electrode and the negative electrode of the external ultrasonic wave power supply, one end of the two carbon fiber bundles is provided in the shape of a brush and respectively contacts and electrifies the two copper rings.

[0013] The contact type electric energy transmission ultrasonic machine tool machining device, wherein the upper part of the support is provided with an arc-shaped connecting part, the lower end of the support is provided with two mutually parallel mounting platforms, the arc-shaped connecting part is connected to the outer side of the machine tool electric spindle through a screw, and the two mounting platforms are respectively used for mounting the two carbon fiber bundles.

[0014] The contact type electric energy transmission ultrasonic machine tool machining device, wherein the conductive assembly further comprises two fixing clamps, the two fixing clamps are respectively fixedly connected to the end faces of the two mounting platforms away from each other through screws, one end of the carbon fiber bundle provided in the shape of a brush protrudes out of the mounting platform, and the other end of the carbon fiber bundle is clamped between the fixing clamp and the mounting platform.

[0015] The contact type electric energy transmission ultrasonic machine tool machining device, wherein the ultrasonic vibrator comprises a front matching block, a rear matching block, four piezoelectric ceramic sheets and four electrode sheets, the front matching block and the rear matching block are connected through a prestressed bolt, the number of the four piezoelectric ceramic sheets and the number of the four electrode sheets are both four, the four piezoelectric ceramic sheets and the four electrode sheets are alternately sleeved outside the prestressed bolt and located between the front matching block and the rear matching block.

[0016] The contact type electric energy transmission ultrasonic machine tool machining device, wherein the upper part of the front matching block is provided with a flange plate, the flange plate is provided with a first screw hole, and the outer side of the flange plate is provided with a first conical surface; the lower end of the shank is provided with a second conical surface matched with the first conical surface, the plane of the lower end of the shank connected with the second conical surface is provided with a second screw hole corresponding to the first screw hole, and the first screw hole and the second screw hole are used for mounting a screw to fixedly connect the ultrasonic vibrator and the shank.

[0017] The contact type electric energy transmission ultrasonic machine tool processing device, wherein the side wall of the insulating sleeve is provided with a first through groove, the shank is provided with a second through groove corresponding to the first through groove, the second through groove is communicated with the cavity, the cavity is provided with a wire groove, and the second through groove penetrates the bottom wall of the wire groove.

[0018] The contact type electric energy transmission ultrasonic machine tool processing device, wherein the upper outer side of the shank is provided with a third taper surface, and the machine tool electric main shaft is provided with an inner taper surface matched with the third taper surface.

[0019] The contact type electric energy transmission ultrasonic machine tool processing device, wherein the outer side of the middle part of the shank is provided with a groove for transmitting torque, and the lower end of the machine tool electric main shaft is provided with a key block matched with the groove.

[0020] The contact type electric energy transmission ultrasonic machine tool processing device, wherein the lower part of the front matching block is provided with a containing cavity, the ER collet is contained in the containing cavity, the outer side of the lower part of the front matching block is provided with an external thread, and the ER nut is screwed on the front matching block through the external thread.

[0021] Beneficial effects:

[0022] The utility model provides a contact type electric energy transmission ultrasonic machine tool processing device, including machine tool electric main shaft, ultrasonic shank, ultrasonic cutter, support and conducting component, ultrasonic shank sets up two copper ring electric connection in ultrasonic vibrator of ultrasonic cutter, conducting component installs to the lower part of support, and conducting component includes two carbon fiber bundles, and two carbon fiber bundles respectively contact two copper ring, when ultrasonic milling is carried out, machine tool electric main shaft drives ultrasonic shank high -speed rotation and drives ultrasonic cutter rotation, and carbon fiber bundle electric connection is in outside ultrasonic wave power supply, and carbon fiber bundle realizes power supply to ultrasonic vibrator through contact copper ring, to make ultrasonic vibrator emit ultrasonic vibration, realizes ultrasonic milling. The contact type electric energy transmission ultrasonic machine tool processing device sets up carbon fiber bundle contact copper ring power supply to ultrasonic vibrator, and carbon fiber bundle sets up into brush shape, and when ultrasonic shank high -speed rotation, carbon fiber bundle sweeps the surface of copper ring and realizes electric energy transmission, because of the wear -resisting, soft, high conductivity characteristics of carbon fiber, carbon fiber bundle can keep good contact with copper ring all the time, and the purpose of reducing wear and improving electric energy transmission stability is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The utility model provides the assembly three -dimensional structure schematic diagram of contact type electric energy transmission ultrasonic machine tool processing device;

[0024] Figure 2 The utility model provides the exploded three -dimensional structure schematic diagram of contact type electric energy transmission ultrasonic machine tool processing device;

[0025] Figure 3The utility model provides an exploded stereoscopic structure schematic drawing of the ultrasonic cutter handle.

[0026] Figure 4 The utility model provides an assembly stereoscopic structure schematic drawing of the ultrasonic cutter handle.

[0027] Figure 5 The utility model provides an assembly cutaway structure schematic drawing of the ultrasonic cutter handle.

[0028] Figure 6 The utility model provides an assembly cutaway structure schematic drawing of the ultrasonic cutter.

[0029] Figure 7 The utility model provides an exploded stereoscopic structure schematic drawing of the ultrasonic cutter.

[0030] Figure 8 The utility model provides a stereoscopic structure schematic drawing of the electric component and support.

[0031] Reference signs:

[0032] 1 - machine tool electric main shaft 2 - ultrasonic cutter handle 3 - ultrasonic cutter

[0033] 4 - support 5 - electric component 11 - key block

[0034] 21 - pull nail 22 - cutter handle 23 - insulating sleeve

[0035] 24 - copper ring 31 - ultrasonic vibrator 32 - ER chuck

[0036] 33 - cutter 41 - arc connecting portion 42 - installation platform

[0037] 51 - carbon fiber bundle 52 - fixed clamp 221 - cavity

[0038] 222 - second taper surface 223 - second screw hole 224 - second through slot

[0039] 225 - wire groove 226 - third taper surface 227 - recess

[0040] 231 - first through slot 232 - installation section 233 - connecting section

[0041] 311 - front matching block 312 - rear matching block 313 - piezoelectric ceramic sheet

[0042] 314 - electrode sheet 315 - pre-stressed bolt 321 - ER nut

[0043] 322 - ER collet chuck 3111 - flange plate 3112 - first screw hole

[0044] 3113 - first conical surface 3114 - accommodating cavity 3115 - external thread. DETAILED DESCRIPTION

[0045] The utility model provides a contact type electric energy transmission ultrasonic machine tool processing device, in order to make the purpose, technical scheme and effect of the utility model more clear, explicit, the following refers to the drawing and raises example to the utility model further detailed explanation. It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0046] In the description of the utility model, it is understood that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, and a particular orientation configuration and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, "first", "second" is only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0047] Please refer to Figures 1 to 8 The utility model provides a contact type electric energy transmission ultrasonic machine tool processing device, wherein, including: machine tool electric main shaft 1, ultrasonic tool holder 2, ultrasonic tool 3, support 4 and conducting assembly 5, machine tool electric main shaft 1 drive connection ultrasonic tool holder 2, the lower end of ultrasonic tool holder 2 is connected with the upper end of ultrasonic tool 3, support 4 installs in the outside of machine tool electric main shaft 1, conducting assembly 5 installs in the lower end of support 4, in this embodiment, machine tool electric main shaft 1 includes shell and inner drive shaft, ultrasonic tool holder 2 is connected to inner drive shaft and is driven to rotate by inner drive shaft, support 4 is connected to one side of shell and is used to install and support conducting assembly 5, and conducting assembly 5 is used to electrically connect external power supply to power ultrasonic transducer 31 of ultrasonic tool holder 2. Tool 3 includes milling cutter, drill bit, boring tool and the like, realizes ultrasonic milling, grinding, drilling processing using ultrasonic tool 3, and the processing quality can be improved.

[0048] Please refer to Figures 2 to 5As shown, the ultrasonic tool handle 2 includes a rivet 21, a tool handle 22, an insulating sleeve 23 and two copper rings 24. The rivet 21 is connected to the upper end of the tool handle 22, and the insulating sleeve 23 is fixedly sleeved on the outer side of the lower end of the tool handle 22. The two copper rings 24 are respectively sleeved outside the insulating sleeve 23 and insulated by the insulating sleeve 23. The lower part of the tool handle 22 is provided with a cavity 221 for accommodating and installing the ultrasonic vibrator 31; in this embodiment, the lower end of the rivet 21 is screwed to the upper end of the tool handle 22, and the upper part of the tool handle 22 is configured to be conical to adapt to the assembly with the machine tool electric spindle 1. Screw holes are provided on the wall of the cavity 221 at the lower part of the tool handle 22 and on the side wall of the insulating sleeve 23, and the insulating sleeve 23 and the tool handle 22 are fixedly connected by screws screwed into the screw holes. The two copper rings 24 are installed using an insulating sleeve 23 to insulate and separate the two copper rings 24 to avoid contact and short circuit. The two copper rings 24 are used to transmit the electrical energy transmitted by the conductive component 5 to the ultrasonic vibrator 31 of the ultrasonic tool 3, so that the ultrasonic vibrator 31 can convert the electrical energy into mechanical energy (ultrasonic vibration).

[0049] See also Figure 3 As shown, the insulating sleeve 23 includes two mounting sections 232 and a connecting section 233. The mounting sections 232 are provided at either end of the connecting section 233. The outer diameter of the mounting sections 232 is smaller than that of the connecting section 233. The mounting sections 232 are used to mount the copper ring 24, while the connecting section 233 is used to securely connect the copper ring 24 to the handle 22 with screws. In this embodiment, screw holes for mounting the screws are provided in the connecting section 233, as are first through slots 231 to prevent interference with the installation of the copper ring 24. The connecting section 233 insulates the two copper rings 24, preventing contact and short circuits between the two copper rings 24.

[0050] See also Figures 6 to 7 As shown, the ultrasonic tool 3 includes an ultrasonic vibrator 31, an ER chuck 32 and a tool 33. The positive and negative poles of the ultrasonic vibrator 31 are electrically connected to the two copper rings 24 respectively, and the tool 33 is connected to the lower end of the ultrasonic vibrator 31 via the ER chuck 32. In this embodiment, the ultrasonic vibrator 31 is an ultrasonic vibrator, which can convert the electrical energy transmitted from the conductive component 5 and the copper ring 24 into ultrasonic vibration. The ultrasonic vibration is transmitted to the tool 33, which can improve the milling processing quality. The tool 33 is an ordinary end mill 33.

[0051] See also Figures 6 to 7As shown, the ER chuck 32 includes an ER nut 321 and an ER collet 322, the ER collet 322 is connected to the upper end of the tool 33, the lower end of the ER collet 322 is connected to the ER nut 321, the upper end of the ER collet 322 is connected to the inner side of the lower end of the ultrasonic vibrator 31, and the ER nut 321 is connected to the outer side of the lower end of the ultrasonic vibrator 31; in this embodiment, the ER nut 321 is an ER16 nut, and the ER collet 322 is an ER16 collet. The tool 33 is connected to the ultrasonic vibrator 31 through the ER chuck 32, different diameter tools 33 can be replaced according to actual machining requirements, and the applicability of the milling machining device is improved.

[0052] The conductive assembly 5 includes two carbon fiber bundles 51, which are respectively electrically connected to the positive and negative poles of an external power supply, and the other ends of the two carbon fiber bundles 51 are arranged in the shape of brushes and respectively contact and conduct electricity with the two copper rings 24. In this embodiment, the carbon fiber bundle 51 is composed of a plurality of carbon fiber filaments, one end of the carbon fiber filaments is bundled together, and the other end is in the shape of a flat and long brush. The thickness of the carbon fiber bundle 51 is less than the width of the copper ring 24, so as to prevent the two carbon fiber bundles 51 from contacting each other or the carbon fiber bundle 51 from being mistakenly touched with the two copper rings 24 at the same time, thereby causing a short circuit.

[0053] When performing ultrasonic milling machining, the machine tool electric spindle 1 drives the ultrasonic tool holder 2 to rotate at high speed and drives the ultrasonic tool 3 to rotate, the carbon fiber bundle 51 is electrically connected to an external ultrasonic power supply, and the carbon fiber bundle 51 realizes power supply to the ultrasonic vibrator 31 by contacting the copper ring 24, so that the ultrasonic vibrator 31 emits ultrasonic vibration, and ultrasonic milling machining is realized. The contact type electric energy transmission ultrasonic machine tool machining device realizes power supply to the ultrasonic vibrator 31 by arranging the carbon fiber bundle 51 to contact the copper ring 24. The carbon fiber bundle 51 is arranged in the shape of a brush, and when the ultrasonic tool holder 2 rotates at high speed, the carbon fiber bundle 51 sweeps the surface of the copper ring 24 to realize electric energy transmission. Due to the characteristics of wear resistance, softness and high conductivity of carbon fiber, the carbon fiber bundle 51 can always maintain good contact with the copper ring 24, thereby achieving the purposes of reducing wear and improving the stability of electric energy transmission.

[0054] Please refer to Figures 1 to 2 , Figure 8As shown, the upper part of the bracket 4 is provided with an arc-shaped connecting part 41, and the lower end of the bracket 4 is provided with two parallel mounting platforms 42, the arc-shaped connecting part 41 is connected to the outer side of the machine tool electric spindle 1 via screws, and the two mounting platforms 42 are respectively used for mounting two carbon fiber bundles 51. In this embodiment, the bracket 4 is made of insulating material, and the arc-shaped connecting part 41 is connected to the outer shell of the machine tool electric spindle 1 via screws, and plays a centering role. The shape of the bracket 4 and the two mounting platforms 42 looks like an upside-down "F" shape from the side, and the two carbon fiber bundles 51 are respectively located at the end faces of the two mounting platforms 42 away from each other, that is, the two carbon fiber bundles 51 are separated by the two mounting platforms 42, so as to avoid short circuit between the two carbon fiber bundles 51 as much as possible.

[0055] In some other embodiments, the mounting platforms 42 of the bracket 4 can be arranged in a ring shape, and the mounting platforms 42 surround the ultrasonic knife handle 2, and the carbon fiber bundles 51 are also arranged in the shape of a ring-shaped brush with bristles pointing to the center of the circle, so that the carbon fiber bundles 51 are in full contact with the copper ring 21.

[0056] As shown in Figures 1 to 2 , Figure 8 As shown, the conductive assembly 5 further includes two fixing clamps 52, the two fixing clamps 52 are respectively fixedly connected to the end faces of the two mounting platforms 42 away from each other via screws, one end of the carbon fiber bundle 51 protruding out of the mounting platform 42 in the shape of a brush, and the other end of the carbon fiber bundle 51 is clamped between the fixing clamp 52 and the mounting platform 42. In this embodiment, the fixing clamp 52 is made of a material with conductive properties, and the fixing clamp 52 and the mounting platform 42 are both provided with screw holes for mounting screws, and the external power supply line is screwed into the screw holes of the mounting platform 42 and the fixing clamp 52, and the fixing clamp 52 presses the carbon fiber bundle 51, so as to form a path for transmitting electric energy from the power supply line to the carbon fiber bundle 51, and then to the copper ring 24 by the carbon fiber bundle 51, and then to the ultrasonic vibrator 31.

[0057] As shown in Figures 6 to 7As shown, the ultrasonic transducer 31 includes a front matching block 311, a rear matching block 312, a piezoelectric ceramic sheet 313, and an electrode sheet 314. The front matching block 311 and the rear matching block 312 are connected via prestressed bolts 315. The number of piezoelectric ceramic sheets 313 and the number of electrode sheets 314 are both n, where n ≥ 2. The n piezoelectric ceramic sheets 313 and the n electrode sheets 314 are alternately sleeved outside the prestressed bolts 315 and located between the front matching block 311 and the rear matching block 312. In this embodiment, n = 2, and the piezoelectric ceramic sheets 313 use axially polarized piezoelectric ceramic rings to ensure that the piezoelectric transducer has the highest possible energy conversion, that is, a high electromechanical coupling coefficient. The four piezoelectric ceramic sheets 313 and the four electrode sheets 314 are arranged alternately in sequence according to different polarization directions. The inner diameter and outer diameter of the piezoelectric ceramic sheets 313 and the electrode sheets 314 are the same. The front matching block 311, the rear matching block 312, and the prestressed bolts 315 cooperate to clamp the piezoelectric ceramic sheets 313 and the electrode sheets 314 to form a sandwich ultrasonic vibrator 31, which converts electrical energy into ultrasonic waves. This not only utilizes the longitudinal effect of the piezoelectric ceramic sheets 313 to obtain a lower resonant frequency, but also keeps the piezoelectric ceramic sheets 313 in a compressed state during operation, preventing the piezoelectric ceramic sheets 313 from breaking due to poor tensile strength during operation.

[0058] See also Figure 4 、 Figures 6 to 7 As shown, a flange 3111 is provided on the upper part of the front matching block 311, a first screw hole 3112 is provided on the flange 3111, and a first conical surface 3113 is provided on the outer side of the flange 3111; a second conical surface 222 is provided at the lower end of the handle 22 to match the first conical surface 3113, and a second screw hole 223 corresponding to the first screw hole 3112 is provided on the plane where the lower end of the handle 22 is connected to the second conical surface 222. The first screw hole 3112 and the second screw hole 223 are used to install screws to fix the ultrasonic vibrator 31 to the handle 22. In this embodiment, the cavity 221 of the tool handle 22 can accommodate the upper half of the ultrasonic vibrator 31 to the flange 3111. The top surface of the flange 3111 cooperates with the lower end surface of the cavity 221, and the first conical surface 3113 cooperates with the second conical surface 222. Then, the first screw hole 3112 and the second screw hole 223 are screwed into and fixedly connected. The two-sided matching structural design makes the installation of the ultrasonic vibrator 31 more precise, and also improves the installation accuracy of the tool 33.

[0059] See also Figures 3 to 5As shown, the side wall of the insulating sleeve 23 is provided with a first through slot 231, the shank 22 is provided with a second through slot 224 corresponding to the first through slot 231, the second through slot 224 is communicated with the cavity 221, the cavity 221 is provided with a wire slot 225, and the second through slot 224 penetrates the bottom wall of the wire slot 225. In this embodiment, the first through slot 231 penetrates the side wall of the insulating sleeve 23, the second through slot 224 penetrates the wall of the cavity 221, the cross-sectional area of the first through slot 231 and the second through slot 224 is 4*15mm, the number of the first through slot 231 and the second through slot 224 is two, and the two first through slots 231 are symmetrically arranged about the central axis of the insulating sleeve 23; the wire slot 225 is concavely formed from the inner wall of the cavity 221, and the number of the wire slot 225 is two, and the two wire slots 225 are symmetrically arranged about the central axis of the shank 22. During installation, one end of the wire is electrically connected to the copper ring 24, the other end of the wire passes through the first through slot 231 and the second through slot 224 and enters the wire slot 225 and is electrically connected to the ultrasonic vibrator 31. The provision of two first through slots 231 and second through slots 224 facilitates the passage and arrangement of the positive and negative wires, and the two wire slots 225 provide extra space for wiring in the cavity 221, thereby avoiding affecting the normal installation and use of the ultrasonic vibrator 31.

[0060] Please refer to Figures 2 to 5 As shown, the upper outer side of the shank 22 is provided with a third taper surface 226, and the machine tool electric spindle 1 is provided with an inner taper surface in contact with the third taper surface 226. In this embodiment, the taper ratio of the third taper surface 226 is 7:24, and the third taper surface 226 is arranged to cooperate with the inner taper surface to achieve the function of centering without self-locking, thereby facilitating the disassembly, maintenance and replacement of the ultrasonic shank 2.

[0061] Please refer to Figures 1 to 4 As shown, the outer side of the middle part of the shank 22 is provided with a groove 227 for transmitting torque, and the lower end of the machine tool electric spindle 1 is provided with a key block 11 assembled with the groove 227. In this embodiment, the groove is opened along the axial direction of the shank 22, and the key block is accommodated in the groove during assembly. When the machine tool electric spindle 1 rotates, the side surface of the key block will push against the side wall of the groove, thereby causing the shank 22 to rotate, achieving the purpose of driving the cutter 33 to rotate for machining.

[0062] Please refer to Figures 5 to 6 As shown, the lower part of the front matching block 311 is provided with a containing cavity 3114, the ER collet 322 is accommodated in the containing cavity 3114, the outer side of the lower part of the front matching block 311 is provided with an external thread 3115, and the ER nut 321 is screwed to the front matching block 311 through the external thread 3115. In this embodiment, the front matching block 311 is like the lower end of the amplitude lever, and the ER chuck 32 is used to install and connect the cutter 33, which can improve the precision of milling and the quality of the surface roughness of the parts.

[0063] In summary, the application supplies power to the ultrasonic vibrator 31 by setting the carbon fiber bundle 51 to contact the copper ring 24, the carbon fiber bundle 51 is set to the shape of a brush, when the ultrasonic knife handle 2 rotates at high speed, the carbon fiber bundle 51 sweeps the surface of the copper ring 24 to realize power transmission, because of the wear-resistant, soft and high-conductive characteristics of the carbon fiber, the carbon fiber bundle 51 can always maintain good contact with the copper ring 24, which realizes the purpose of reducing wear and improving the stability of power transmission.

[0064] Advantage 1: Because the ultrasonic knife handle 2 adopts the structure of the outer copper ring 24 and the inner cavity 221, the ultrasonic cutter 3 can be installed on the ultrasonic knife handle 2, and the cavity wall has a 4*15mm through slot for passing through the lead to connect the copper ring 24 and the positive and negative poles of the ultrasonic vibrator 31, and the copper ring 24 is powered, which is equivalent to powering the ultrasonic vibrator 31.

[0065] Advantage 2: Because the piezoelectric ceramic sheet 313 adopts an axial polarization piezoelectric ceramic ring, it can always maintain a high electromechanical coupling coefficient. Because the sandwich type ultrasonic vibrator 31 is adopted, both the longitudinal effect of the piezoelectric ceramic sheet 313 is utilized to obtain a lower resonance frequency, and the piezoelectric ceramic sheet 313 is always in a compression state during work, which prevents the piezoelectric ceramic sheet 313 from breaking due to poor tensile strength during work.

[0066] Advantage 3: Because the carbon fiber bundle 51 (fixed part) + copper ring 24 (rotating part) is used to supply power to the ultrasonic vibrator 31, the wear is reduced and the stability of power transmission is improved.

[0067] It can be understood that for those skilled in the art, equivalent replacement or change can be made according to the technical scheme and the utility model concept of the application, and all these changes or replacements shall belong to the protection scope of the claims attached to the application.

Claims

1. A contact-type power transmission ultrasonic machine tool processing device, characterized in that: include: A machine tool electric spindle (1), an ultrasonic tool handle (2), an ultrasonic tool (3), a bracket (4) and a conductive component (5); the machine tool electric spindle (1) is driven and connected to the ultrasonic tool handle (2); the lower end of the ultrasonic tool handle (2) is connected to the upper end of the ultrasonic tool (3); the bracket (4) is installed on the outside of the machine tool electric spindle (1); and the conductive component (5) is installed on the lower end of the bracket (4); The ultrasonic knife handle (2) comprises a rivet (21), a knife handle (22), an insulating sleeve (23) and two copper rings (24); the rivet (21) is connected to the upper end of the knife handle (22); the insulating sleeve (23) is fixedly sleeved on the outer side of the lower end of the knife handle (22); the two copper rings (24) are respectively sleeved outside the insulating sleeve (23) and insulated and separated by the insulating sleeve (23); the lower part of the knife handle (22) is provided with a cavity (221) for accommodating and installing an ultrasonic vibrator; The insulating sleeve (23) includes a mounting section (232) and a connecting section (233). There are two mounting sections (232). The two mounting sections (232) are respectively arranged at both ends of the connecting section (233). The outer diameter of the mounting section (232) is smaller than the outer diameter of the connecting section (233). The mounting section (232) is used to mount the copper ring (24). The connecting section (233) is used to mount the screw and fixedly connect the handle (22). The ultrasonic tool (3) includes an ultrasonic vibrator (31), an ER chuck (32) and a tool (33). The positive pole and the negative pole of the ultrasonic vibrator (31) are respectively electrically connected to the two copper rings (24). The tool (33) is connected to the lower end of the ultrasonic vibrator (31) via the ER chuck (32). The ER chuck (32) includes an ER nut (321) and an ER collet (322), wherein the ER collet (322) is connected to the upper end of the tool (33), the lower end of the ER collet (322) is connected to the ER nut (321), the upper end of the ER collet (322) is connected to the inner side of the lower end of the ultrasonic vibrator (31), and the ER nut (321) is connected to the outer side of the lower end of the ultrasonic vibrator (31); The conductive component (5) includes two carbon fiber bundles (51), one end of the two carbon fiber bundles (51) is electrically connected to the positive electrode and the negative electrode of an external ultrasonic power supply, respectively, and the other end of the two carbon fiber bundles (51) is configured in a brush shape and is in contact with two copper rings (24) to be energized.

2. The contact-type power transmission ultrasonic machine tool processing device according to claim 1, characterized in that: The upper portion of the bracket (4) is provided with an arc-shaped connecting portion (41), and the lower end of the bracket (4) is provided with two mutually parallel mounting platforms (42). The arc-shaped connecting portion (41) is connected to the outer side of the machine tool electric spindle (1) via screws, and the two mounting platforms (42) are respectively used to install two carbon fiber bundles (51).

3. The contact-type power transmission ultrasonic machining device according to claim 2, characterized in that: The conductive component (5) further comprises two fixing clamps (52), the two fixing clamps (52) being fixedly connected to the end surfaces of the two mounting platforms (42) which are away from each other via screws, one end of the carbon fiber bundle (51) being configured in a brush shape protruding from the outside of the mounting platform (42), and the other end of the carbon fiber bundle (51) being clamped between the fixing clamp (52) and the mounting platform (42).

4. The contact-type power transmission ultrasonic machining device according to claim 1, characterized in that: The ultrasonic vibrator (31) comprises a front matching block (311), a rear matching block (312), a piezoelectric ceramic sheet (313) and an electrode sheet (314). The front matching block (311) and the rear matching block (312) are connected via prestressed bolts. The number of the piezoelectric ceramic sheets (313) and the number of the electrode sheets (314) are both n sheets, and n≧2. The n piezoelectric ceramic sheets (313) and the n electrode sheets (314) are alternately sleeved outside the prestressed bolts (315) and located between the front matching block (311) and the rear matching block (312).

5. The contact-type power transmission ultrasonic machining device according to claim 4, characterized in that: The upper part of the front matching block (311) is provided with a flange (3111), the flange (3111) is provided with a first screw hole (3112), and the outer side of the flange (3111) is provided with a first conical surface (3113); the lower end of the handle (22) is provided with a second conical surface (222) matching the first conical surface (3113), and the plane connecting the lower end of the handle (22) and the second conical surface (222) is provided with a second screw hole (223) corresponding to the first screw hole (3112), and the first screw hole (3112) and the second screw hole (223) are used for installing screws to fix the ultrasonic vibrator (31) and the handle (22).

6. The contact-type power transmission ultrasonic machining device according to claim 4, characterized in that: The side wall of the insulating sleeve (23) is provided with a first through slot (231), the knife handle (22) is provided with a second through slot (224) corresponding to the first through slot (231), the second through slot (224) is communicated with the cavity (221), a wire slot (225) is provided in the cavity (221), and the second through slot (224) passes through the bottom wall of the wire slot (225).

7. The contact-type power transmission ultrasonic machining device according to claim 4, characterized in that: A third conical surface (226) is provided on the outer side of the upper portion of the tool handle (22), and the machine tool electric spindle (1) is provided with an inner conical surface that is in contact with the third conical surface (226).

8. The contact-type power transmission ultrasonic machining device according to claim 4, characterized in that: A groove (227) for transmitting torque is provided on the outer side of the middle portion of the tool handle (22), and a key block (11) assembled with the groove (227) is provided at the lower end of the machine tool electric spindle (1).

9. The contact-type power transmission ultrasonic machining device according to claim 4, characterized in that: The lower portion of the front matching block (311) is provided with an accommodating cavity (3114), the ER collet (322) is accommodated in the accommodating cavity (3114), the outer side of the lower portion of the front matching block (311) is provided with an external thread (3115), and the ER nut (321) is screwed to the front matching block (311) via the external thread (3115).

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