Contact type electric energy transmission ultrasonic machine tool machining device and electric energy transmission method

Abstract

The invention 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 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. And the two carbon fiber bundles are respectively contacted with the two copper rings. During ultrasonic machining, the electric spindle of the machine tool drives the ultrasonic cutter handle to rotate at a high speed and drives the ultrasonic cutter to rotate, the carbon fiber bundle is electrically connected to an external ultrasonic power source, and the carbon fiber bundle supplies power to the ultrasonic vibrator by making contact with the copper ring, so that the ultrasonic vibrator generates ultrasonic vibration, and ultrasonic machining is achieved. According to the contact type electric energy transmission ultrasonic machine tool machining device, the carbon fiber bundles are arranged to make contact with the copper rings to supply power to the ultrasonic vibrators, due to the characteristics of abrasion resistance, softness and high conductivity of carbon fibers, the carbon fiber bundles can keep good contact with the copper rings all the time, and the purposes of reducing abrasion and improving electric energy transmission stability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic machine tool processing, and in particular to a contact-type power transmission ultrasonic machine tool processing device and a power transmission method. Background Art

[0002] Ultrasonic vibration-assisted machine tool processing, such as ultrasonic vibration-assisted milling, can improve the surface quality and processing efficiency of the processed parts. Ultrasonic vibration-assisted milling is based on traditional milling. By applying ultrasonic frequency vibrations to 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 cutting forces, reduce tool wear, and extend tool life, while improving the surface quality and processing efficiency of the processed parts. Ultrasonic vibration-assisted milling technology is widely used in the cutting of difficult-to-process materials, such as titanium alloys, high-temperature alloys, etc., as well as in the fields of precision mold manufacturing and complex surface processing.

[0003] Since the milling tool must rotate at high speed following the milling machine spindle during ultrasonic milling, the ultrasonic transducer used in tool vibration milling is also in a high-speed rotating state during operation. For the power supply of high-speed rotating loads, two methods can usually be used: conductive slip rings and inductive conduction. However, under high-speed rotation, the conductive slip ring wears very severely and is not suitable for powering the ultrasonic transducer during milling. The transmission efficiency of inductive conduction is affected by many factors, such as the degree of electromagnetic coupling, load changes, etc., which may lead to unstable power transmission.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a contact-type power transmission ultrasonic machine tool processing device, aiming to solve the technical problems of unstable power transmission of ultrasonic transducers and easy wear of conductive parts in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A contact-type power transmission ultrasonic machine tool processing device, comprising: a machine tool electric spindle, an ultrasonic tool handle, an ultrasonic tool, a bracket and a conductive component, wherein the machine tool electric spindle is driven and connected to the ultrasonic tool handle, the lower end of the ultrasonic tool handle is connected to the upper end of the ultrasonic tool, the bracket is installed on the outer side of the machine tool electric spindle, and the conductive component is installed on the lower end of the bracket;

[0008] The ultrasonic knife handle includes two copper rings, which are respectively connected to the positive electrode and the negative electrode of the ultrasonic knife;

[0009] The ultrasonic cutter includes an ultrasonic vibrator and a cutter, wherein the positive electrode and the negative electrode of the ultrasonic vibrator are electrically connected to two copper rings respectively, and the cutter is connected to the lower end of the ultrasonic vibrator;

[0010] The conductive component includes two carbon fiber bundles, one end of the two carbon fiber bundles is electrically connected to the positive electrode and the negative electrode of the external power supply respectively, and the other end of the two carbon fiber bundles is set in a brush shape and is in contact with two copper rings respectively to be energized.

[0011] The contact-type power transmission ultrasonic machine tool processing device is characterized in that an arc-shaped connecting portion is provided on the upper part of the bracket, and two mutually parallel mounting platforms are provided on the lower end of the bracket. The arc-shaped connecting portion is connected to the outer side of the machine tool electric spindle via screws, and the two mounting platforms are respectively used to install two carbon fiber bundles.

[0012] The contact-type power transmission ultrasonic machine tool processing device, wherein the conductive component also includes two fixing clamps, which are respectively fixedly connected to the end surfaces of the two mounting platforms that are away from each other via screws, one end of the carbon fiber bundle configured in the shape of a brush protrudes outside the mounting platform, and the other end of the carbon fiber bundle is clamped between the fixing clamp and the mounting platform.

[0013] The contact-type electric energy transmission ultrasonic machine tool processing device, wherein the ultrasonic tool handle includes a rivet, a tool handle and an insulating sleeve, the rivet is connected to the upper end of the tool handle, the insulating sleeve is fixedly sleeved on the outer side of the lower end of the tool handle, two copper rings are respectively sleeved outside the insulating sleeve and insulated and separated by the insulating sleeve, and the lower part of the tool handle is provided with a cavity for accommodating and installing an ultrasonic vibrator.

[0014] The contact-type power transmission ultrasonic machine tool processing device, wherein the ultrasonic vibrator includes a front matching block, a rear matching block, a piezoelectric ceramic sheet and an electrode sheet. The front matching block and the rear matching block are connected via prestressed bolts. The number of piezoelectric ceramic sheets and the number of electrode sheets are both n sheets, n≧2, and the n piezoelectric ceramic sheets and the n electrode sheets are alternately sleeved outside the prestressed bolts and located between the front matching block and the rear matching block.

[0015] The contact-type power transmission ultrasonic machine tool processing device, wherein the ultrasonic tool also includes an ER chuck, the ER chuck includes an ER nut and an ER collet, the ER collet is connected to the upper end of the tool, the upper end of the ER collet extends into the inner side of the lower end of the front matching block, the lower end of the ER collet is connected to the ER nut, and the ER nut is screwed to the outer side of the lower end of the front matching block.

[0016] The contact-type power transmission ultrasonic machine tool processing device is characterized in that a flange is provided on the upper part of the front matching block, the flange is provided with a first screw hole, and a first conical surface is provided on the outer side of the flange; a second conical surface matching the first conical surface is provided at the lower end of the tool handle, and a second screw hole corresponding to the first screw hole is provided on the plane connecting the lower end of the tool handle and the second conical surface, and the first screw hole and the second screw hole are used to install screws to fix the ultrasonic vibrator to the tool handle.

[0017] The contact-type power transmission ultrasonic machine tool processing device is characterized in that a first through groove is provided on the side wall of the insulating sleeve, a second through groove corresponding to the first through groove is provided on the tool handle, the second through groove is connected to the cavity, a wire groove is provided in the cavity, and the second through groove passes through the bottom wall of the wire groove.

[0018] In the contact-type power transmission ultrasonic machine tool processing device, a third conical surface is arranged on the outer side of the upper part of the tool handle, and the machine tool electric spindle is arranged with an inner conical surface which cooperates with and contacts the third conical surface.

[0019] In the contact-type power transmission ultrasonic machine tool processing device, a groove for transmitting torque is arranged on the outer side of the middle part of the tool handle, and a key block assembled with the groove is arranged at the lower end of the machine tool electric spindle.

[0020] A method for transmitting electric energy to a contact-type electric energy transmission ultrasonic machine tool processing device, characterized in that it comprises the contact-type electric energy transmission ultrasonic machine tool processing device as described above, and further comprises the following steps:

[0021] S01, an external ultrasonic power source transmits electrical energy to the carbon fiber bundle;

[0022] S02, the carbon fiber bundle contacts the surface of the copper ring through the brush to transfer electrical energy to the copper ring;

[0023] S03, the copper ring transmits electrical energy to the ultrasonic vibrator through the wire;

[0024] S04. The ultrasonic vibrator converts electrical energy into mechanical energy in the form of ultrasonic vibration and transmits the ultrasonic vibration to the tool.

[0025] Beneficial effects:

[0026] The present invention provides a contact-type power transmission ultrasonic machine tool processing device, comprising a machine tool electric spindle, an ultrasonic tool handle, an ultrasonic tool, a bracket and a conductive component, wherein the ultrasonic tool handle is provided with two copper rings electrically connected to the ultrasonic vibrator of the ultrasonic tool, and the conductive component is installed at the lower part of the bracket, and the conductive component comprises two carbon fiber bundles, and the two carbon fiber bundles contact the two copper rings respectively. When ultrasonic milling is performed, the machine tool electric spindle drives the ultrasonic tool handle to rotate at high speed and drives the ultrasonic tool to rotate, and the carbon fiber bundle is electrically connected to an external ultrasonic power supply, and the carbon fiber bundle is contacted with the copper ring to realize power supply to the ultrasonic vibrator, so that the ultrasonic vibrator emits ultrasonic waves to realize ultrasonic milling. The contact-type power transmission ultrasonic machine tool processing device powers the ultrasonic vibrator by setting the carbon fiber bundle to contact the copper ring, and the carbon fiber bundle is arranged in a brush shape. When the ultrasonic tool handle rotates at high speed, the carbon fiber bundle sweeps the surface of the copper ring to realize power transmission. Due to the wear-resistant, soft and highly conductive characteristics of carbon fiber, the carbon fiber bundle can always maintain good contact with the copper ring, thereby achieving the purpose of reducing wear and improving the stability of power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the assembly three-dimensional structure of the contact-type power transmission ultrasonic machine tool processing device provided by the present invention;

[0028] Figure 2 A schematic diagram of the exploded three-dimensional structure of the contact-type power transmission ultrasonic machine tool processing device provided by the present invention;

[0029] Figure 3 A schematic diagram of the exploded three-dimensional structure of the ultrasonic knife handle provided by the present invention;

[0030] Figure 4 A schematic diagram of the three-dimensional structure of the ultrasonic knife handle provided by the present invention;

[0031] Figure 5 This is a schematic diagram of the assembly and section structure of the ultrasonic knife handle provided by the present invention;

[0032] Figure 6 A schematic diagram of the assembly and section structure of the ultrasonic cutter provided by the present invention;

[0033] Figure 7 A schematic diagram of the exploded three-dimensional structure of the ultrasonic cutter provided by the present invention;

[0034] Figure 8 This is a schematic diagram of the three-dimensional structure of the conductive component and the bracket provided by the present invention.

[0035] Reference numerals:

[0036] 1—machine tool electric spindle 2—ultrasonic tool holder 3—ultrasonic tool

[0037] 4—Bracket 5—Conductive component 11—Key block

[0038] 21—Copper ring 22—Rivet 23—Handle

[0039] 24 - insulation sleeve 31 - ultrasonic vibrator 32 - tool

[0040] 33—ER chuck 41—arc-shaped connection 42—mounting platform

[0041] 51 - carbon fiber bundle 52 - fixing clip 231 - cavity

[0042] 232 - second conical surface 233 - second screw hole 234 - second through groove

[0043] 235 - wire groove 236 - third cone surface 237 - groove

[0044] 241 - first through slot 242 - mounting section 243 - connecting section

[0045] 311—front matching block 312—rear matching block 313—piezoelectric ceramic sheet

[0046] 314—Electrode sheet 315—Prestressed bolt 331—ER nut

[0047] 332—ER collet 3111—flange 3112—first screw hole

[0048] 3113 —first conical surface 3114 —accommodating cavity 3115 —external thread. DETAILED DESCRIPTION

[0049] The present invention provides a contact-type power transmission ultrasonic machine tool processing device and a power transmission method. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation of the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0051] See also Figures 1 to 8 As shown, the present invention provides a contact-type power transmission ultrasonic machine tool processing device, which includes: 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 drives and connects 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; in this embodiment, the machine tool electric spindle 1 includes an outer shell and an inner drive shaft, the ultrasonic tool handle 2 is connected to the inner drive shaft and driven to rotate by the inner drive shaft, the bracket 4 is connected to one side of the outer shell and is used to install and support the conductive component 5, and the conductive component 5 is used to electrically connect to an external ultrasonic power supply to power the ultrasonic vibrator 31 of the ultrasonic tool handle 2. The tool 3 includes a milling cutter, a drill bit, a boring tool, etc., and ultrasonic milling, grinding, and drilling processing are realized by using the ultrasonic tool 3, which can improve the processing quality.

[0052] The ultrasonic knife handle 2 includes two copper rings 21, and the two copper rings 21 are respectively connected to the positive pole and the negative pole of the ultrasonic knife 3; in the present embodiment, the two copper rings 21 are insulated and connected to avoid short circuit caused by mutual contact, and the two copper rings 21 are used to transmit the electrical energy transmitted from the conductive component 5 to the ultrasonic vibrator 31 of the ultrasonic knife 3, so that the ultrasonic vibrator 31 can convert the electrical energy into mechanical energy (ultrasonic vibration).

[0053] The ultrasonic tool 3 includes an ultrasonic vibrator 31 and a tool 32. The positive and negative poles of the ultrasonic vibrator 31 are electrically connected to the two copper rings 21 respectively, and the tool 32 is connected to the lower end of the ultrasonic vibrator 31. 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 21 into ultrasonic vibration. The ultrasonic vibration is transmitted to the tool 32, which can improve the processing quality of the machine tool. The tool 32 is an ordinary end mill.

[0054] The conductive component 5 includes two carbon fiber bundles 51, which are electrically connected to the positive and negative electrodes of the external power supply respectively, and the other ends of the two carbon fiber bundles 51 are set in a brush shape and are respectively in contact with two copper rings 21 for power supply. In this embodiment, the carbon fiber bundle 51 is composed of a plurality of carbon fiber filaments, one end of which is bound together, and the other end is in a flat brush shape. The thickness of the carbon fiber bundle 51 is less than the width of the copper ring 21, so as to prevent the two carbon fiber bundles 51 from contacting each other or the carbon fiber bundles 51 from contacting the two copper rings 21 at the same time, thereby preventing the circuit from short-circuiting.

[0055] When ultrasonic milling is performed, the machine tool electric spindle 1 drives the ultrasonic tool handle 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 source. The carbon fiber bundle 51 contacts the copper ring 21 to power the ultrasonic vibrator 31, so that the ultrasonic vibrator 31 emits ultrasonic vibrations to achieve ultrasonic milling. The contact-type power transmission ultrasonic machine tool processing device powers the ultrasonic vibrator 31 by setting the carbon fiber bundle 51 to contact the copper ring 21. The carbon fiber bundle 51 is set in a brush shape. When the ultrasonic tool handle 2 rotates at high speed, the carbon fiber bundle 51 sweeps the surface of the copper ring 21 to achieve power transmission. Due to the wear-resistant, soft, and highly conductive properties of carbon fiber, the carbon fiber bundle 51 can always maintain good contact with the copper ring 21, thereby achieving the purpose of reducing wear and improving the stability of power transmission.

[0056] See also Figure 1 to Figure 2 , Figure 8 As shown, the upper part 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 mount two carbon fiber bundles 51. In this embodiment, the bracket 4 is made of insulating material, and the arc-shaped connecting portion 41 is connected to the outer shell of the machine tool electric spindle 1 via screws to play a centering role. From the side, the shape of the bracket 4 and the two mounting platforms 42 is like an inverted "F" shape, and the two carbon fiber bundles 51 are respectively located on the end faces of the two mounting platforms 42 that are away from each other, that is, the two carbon fiber bundles 51 are separated by the two mounting platforms 42, and the two carbon fiber bundles 51 are avoided as much as possible from contacting each other and causing a short circuit.

[0057] In some other embodiments, the mounting platform 42 of the bracket 4 can be configured to be ring-shaped, the mounting platform 42 surrounds the ultrasonic knife handle 2, and the carbon fiber bundle 51 is also configured to be a ring-shaped brush with bristles facing the center of the circle according to the shape of the mounting platform 42, so that the carbon fiber bundle 51 is in full contact with the copper ring 21.

[0058] See also Figure 1 to Figure 2 , Figure 8 As shown, the conductive component 5 also includes two fixing clips 52, which are respectively fixedly connected to the end faces of the two mounting platforms 42 that are away from each other via screws. One end of the carbon fiber bundle 51, which is set in a brush shape, protrudes outside the mounting platform 42, and the other end of the carbon fiber bundle 51 is clamped between the fixing clip 52 and the mounting platform 42. In this embodiment, the fixing clip 52 is made of a material with conductive properties, and both the fixing clip 52 and the mounting platform 42 are provided with screw holes for installing screws. The external power line is screwed into the screw holes of the mounting platform 42 and the fixing clip 52 through the screws, and the fixing clip 52 presses the carbon fiber bundle 51, thereby forming a path to transmit electric energy from the power line to the carbon fiber bundle 51, and then the carbon fiber bundle 51 is contacted and transmitted to the copper ring 21, and the copper ring 21 is then transmitted to the ultrasonic vibrator 31.

[0059] See also Figures 2 to 5 As shown, the ultrasonic handle 2 includes a rivet 22, a handle 23 and an insulating sleeve 24. The rivet 22 is connected to the upper end of the handle 23. The insulating sleeve 24 is fixedly sleeved on the outer side of the lower end of the handle 23. The two copper rings 21 are respectively sleeved outside the insulating sleeve 24 and insulated and separated by the insulating sleeve 24. The lower part of the handle 23 is provided with a cavity 231 for accommodating and installing the ultrasonic vibrator 31. In this embodiment, the lower end of the rivet 22 is screwed to the upper end of the handle 23. The upper part of the handle 23 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 231 at the lower part of the handle 23 and on the side wall of the insulating sleeve 24. The insulating sleeve 24 is fixedly connected to the handle 23 by screwing the screw into the screw hole. The two copper rings 21 are installed by using the insulating sleeve 24 so that the two copper rings 21 are insulated and separated to avoid short circuit.

[0060] See also Figure 6 to Figure 7 As shown, the ultrasonic vibrator 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 a prestressed bolt 315. The number of piezoelectric ceramic sheets 313 and the number of electrode sheets 314 are both n sheets, n≧2, and the n piezoelectric ceramic sheets 313 and the n electrode sheets 314 are alternately sleeved outside the prestressed bolt 315 and located between the front matching block 311 and the rear matching block 312. In this embodiment, n=4, and the piezoelectric ceramic sheet 313 uses an axially polarized piezoelectric ceramic ring to ensure that the piezoelectric vibrator has a high degree of mutual energy conversion as much as possible, that is, to ensure 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. The longitudinal effect of the piezoelectric ceramic sheets 313 is utilized to obtain a lower resonance frequency, and the piezoelectric ceramic sheets 313 are always in a compressed state during operation to prevent the piezoelectric ceramic sheets 313 from breaking due to poor tensile strength during operation.

[0061] See also Figure 6 to Figure 7As shown, the ultrasonic tool 3 also includes an ER chuck 33, which includes an ER nut 331 and an ER collet 332. The ER collet 332 is connected to the upper end of the tool 32, and the upper end of the ER collet 332 extends into the inner side of the lower end of the front matching block 311. The lower end of the ER collet 332 is connected to the ER nut 331, and the ER nut 331 is screwed to the outer side of the lower end of the front matching block 311. In this embodiment, the ER nut 331 is an ER16 nut, and the ER collet 332 is an ER16 collet. The tool 32 is connected to the ultrasonic vibrator 31 through the ER chuck 33, and tools 32 of different diameters can be replaced according to actual processing requirements, thereby improving the applicability of the milling processing device.

[0062] See also Figure 4 , Figure 6 to Figure 7 As shown, a flange 3111 is provided on the upper part of the front matching block 311, the flange 3111 is provided with a first screw hole 3112, and a first conical surface 3113 is provided on the outer side of the flange 3111; a second conical surface 232 matching the first conical surface 3113 is provided at the lower end of the handle 23, and a second screw hole 233 corresponding to the first screw hole 3112 is provided on the plane connected to the second conical surface 232 at the lower end of the handle 23, and the first screw hole 3112 and the second screw hole 233 are used for installing screws to fix the ultrasonic vibrator 31 to the handle 23. In this embodiment, the cavity 231 of the tool handle 23 can accommodate the upper part 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 231, the first conical surface 3113 cooperates with the second conical surface 232, and then the first screw hole 3112 and the second screw hole 233 are screwed into and fixedly connected. The structural design of the two-sided cooperation makes the installation of the ultrasonic vibrator 31 more precise, and also improves the installation accuracy of the tool 32.

[0063] See also Figures 3 to 5As shown, the side wall of the insulating sleeve 24 is provided with a first through slot 241, and the handle 23 is provided with a second through slot 234 corresponding to the first through slot 241. The second through slot 234 is connected to the cavity 231, and a wire slot 235 is provided in the cavity 231. The second through slot 234 penetrates the bottom wall of the wire slot 235. In this embodiment, the first through slot 241 penetrates the side wall of the insulating sleeve 24, and the second through slot 234 penetrates the wall of the cavity 231. The cross-sectional area of ​​the first through slot 241 and the second through slot 234 is 4*15㎜. The number of the first through slot 241 and the second through slot 234 are both two, and the two first through slots 241 are arranged symmetrically with the central axis of the insulating sleeve 24 as the axis; the wire slot 235 is formed by being recessed outward from the inner wall of the cavity 231, and the number of the wire slot 235 is two, and the two wire slots 235 are arranged symmetrically with the central axis of the handle 23 as the axis. During installation, one end of the wire is electrically connected to the copper ring 21, and the other end of the wire passes through the first through slot 241 and the second through slot 234 into the wire slot 235 and is electrically connected to the ultrasonic vibrator 31. The two first through slots 241 and the second through slot 234 are provided to facilitate the passage and arrangement of the positive and negative wires, and the two wire slots 235 allow the cavity 231 to have extra space for wiring, thereby avoiding affecting the normal installation and use of the ultrasonic vibrator 31.

[0064] See also Figures 2 to 5 As shown, a third conical surface 236 is provided on the outer side of the upper portion of the tool handle 23, and the machine tool electric spindle 1 is provided with an inner conical surface that cooperates with the third conical surface 236. In this embodiment, the taper ratio of the third conical surface 236 is 7:24, and the third conical surface 236 is provided to cooperate with the inner conical surface, which can play a role of centering without self-locking, and is convenient for disassembly, assembly, maintenance and replacement of the ultrasonic tool handle 2.

[0065] See also Figures 1 to 4 As shown, a groove 237 for transmitting torque is provided on the outer side of the middle part of the tool handle 23, and a key block 11 assembled with the groove 237 is provided at the lower end of the machine tool electric spindle 1. In this embodiment, the groove 237 is opened along the axial direction of the tool handle 23, and the key block 11 is accommodated in the groove 237 during assembly. When the machine tool electric spindle 1 rotates, the side of the key block 11 will push against the side wall of the groove 237, so that the tool handle 23 rotates, thereby achieving the purpose of driving the tool 32 to rotate for processing.

[0066] See also Figures 5 and 6 As shown, the lower part of the front matching block 311 is provided with a receiving cavity 3114, the ER collet 332 is received in the receiving cavity 3114, the lower outer side of the front matching block 311 is provided with an external thread 3115, and the ER nut 331 is screwed to the front matching block 311 via the external thread 3115. In this embodiment, the front matching block 311 is like the lower end of the horn, and the ER collet 33 is used to install the connecting tool 32, which can improve the milling accuracy and the quality of the surface roughness of the parts.

[0067] See also Figure 3 As shown, the insulating sleeve 24 includes a mounting section 242 and a connecting section 243. There are two mounting sections 242, which are respectively arranged at both ends of the connecting section 243. The outer diameter of the mounting section 242 is smaller than the outer diameter of the connecting section 243. The mounting section 242 is used to mount the copper ring 21, and the connecting section 243 is used to mount the screws and fix the connection with the handle 23. In this embodiment, the screw hole for mounting the screw is arranged in the connecting section 243, and the first through groove 241 is also arranged in the connecting section 243 to avoid interference with the installation of the copper ring 21. The two copper rings 21 are insulated and separated by the connecting section 243, so as to avoid contact between the two copper rings 21 and short circuit.

[0068] A method for transmitting electric energy to a contact-type electric energy transmission ultrasonic machine tool processing device, characterized in that it comprises the contact-type electric energy transmission ultrasonic machine tool processing device as described above, and further comprises the following steps:

[0069] S01, an external ultrasonic power source transmits electrical energy to the carbon fiber bundle;

[0070] S02, the carbon fiber bundle contacts the surface of the copper ring through the brush to transfer electrical energy to the copper ring;

[0071] S03, the copper ring transmits electrical energy to the ultrasonic vibrator through the wire;

[0072] S04. The ultrasonic vibrator converts electrical energy into mechanical energy in the form of ultrasonic vibration and transmits the ultrasonic vibration to the tool.

[0073] In this embodiment, step S01 also includes the following steps:

[0074] S101, the external ultrasonic power source transmits electric energy to the fixing clamp through the screw;

[0075] S102, the fixing clamp transmits electrical energy to the carbon fiber bundle.

[0076] In summary, the present invention provides power to the ultrasonic vibrator 31 by setting the carbon fiber bundle 51 to contact the copper ring 21. The carbon fiber bundle 51 is set in a brush shape. When the ultrasonic knife handle 2 rotates at a high speed, the carbon fiber bundle 51 sweeps the surface of the copper ring 21 to achieve power transmission. Due to the wear resistance, softness and high conductivity of carbon fiber, the carbon fiber bundle 51 can always maintain good contact with the copper ring 21, thereby achieving the purpose of reducing wear and improving the stability of power transmission:

[0077] Advantage 1: Since the ultrasonic knife handle 2 adopts the structure of an outer copper ring 21 and an inner cavity 231, the ultrasonic tool 3 can be installed on the ultrasonic knife handle 2, and the cavity wall has a 4*15mm through groove for passing the wire to connect the copper ring 21 with the positive and negative poles of the ultrasonic vibrator 31. Powering the copper ring 21 is equivalent to powering the ultrasonic vibrator 31.

[0078] Advantage 2: Since the piezoelectric ceramic sheet 313 uses an axially polarized piezoelectric ceramic ring, it can always maintain a high electromechanical coupling coefficient. Since the sandwich ultrasonic vibrator 31 is used, 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 compressed state during operation, preventing the piezoelectric ceramic sheet 313 from breaking due to poor tensile strength during operation.

[0079] Advantage 3: Since the carbon fiber bundle 51 (fixed part) + copper ring 21 (rotating part) is used to power the ultrasonic vibrator 31, wear is reduced and the stability of power transmission is improved.

[0080] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

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), wherein 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 outer side 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 two copper rings (21), and the two copper rings (21) are respectively connected to the positive electrode and the negative electrode of the ultrasonic knife (3); The ultrasonic cutter (3) comprises an ultrasonic vibrator (31) and a cutter (32), the positive electrode and the negative electrode of the ultrasonic vibrator (31) are respectively electrically connected to the two copper rings (21), and the cutter (32) is connected to the lower end of the ultrasonic vibrator (31); The conductive component (5) comprises 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 source respectively, and the other ends of the two carbon fiber bundles (51) are arranged in a brush shape and are in contact with two copper rings (21) respectively to be energized.

2. The contact-type power transmission ultrasonic machine tool processing device according to claim 1 is characterized in that: An arc-shaped connecting portion (41) is arranged at the upper portion of the bracket (4), and two mutually parallel mounting platforms (42) are arranged at the lower end of the bracket (4). 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 mount two carbon fiber bundles (51).

3. The contact-type power transmission ultrasonic machine tool processing device according to claim 2 is characterized in that: The conductive component (5) further comprises two fixing clamps (52), the two fixing clamps (52) being respectively 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 arranged in a brush shape protrudes outside the mounting platform (42), and the other end of the carbon fiber bundle (51) is clamped between the fixing clamp (52) and the mounting platform (42).

4. The contact-type power transmission ultrasonic machine tool processing device according to claim 1, characterized in that: The ultrasonic knife handle (2) comprises a rivet (22), a knife handle (23) and an insulating sleeve (24); the rivet (22) is connected to the upper end of the knife handle (23); the insulating sleeve (24) is fixedly sleeved on the outer side of the lower end of the knife handle (23); two copper rings (21) are respectively sleeved outside the insulating sleeve (24) and insulated and separated by the insulating sleeve (24); and a cavity (231) for accommodating and installing an ultrasonic vibrator (31) is provided at the lower part of the knife handle (23).

5. The contact-type power transmission ultrasonic machine tool processing device according to claim 4 is 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 a prestressed bolt (315); the number of the piezoelectric ceramic sheets (313) and the number of the electrode sheets (314) are both n sheets, n≧2; the n piezoelectric ceramic sheets (313) and the n electrode sheets (314) are alternately sleeved outside the prestressed bolt (315) and located between the front matching block (311) and the rear matching block (312).

6. The contact-type power transmission ultrasonic machine tool processing device according to claim 5, characterized in that: The ultrasonic tool (3) also includes an ER chuck (33), which includes an ER nut (331) and an ER cartridge (332). The ER cartridge (332) is connected to the upper end of the tool (32), the upper end of the ER cartridge (332) extends into the inner side of the lower end of the front matching block (311), the lower end of the ER cartridge (332) is connected to the inside of the ER nut (331), and the ER nut (331) is screwed to the outer side of the lower end of the front matching block (311).

7. The contact-type power transmission ultrasonic machine tool processing device according to claim 5, characterized in that: A flange (3111) is arranged on the upper part of the front matching block (311), the flange (3111) is arranged on a first screw hole (3112), and a first conical surface (3113) is arranged on the outer side of the flange (3111); a second conical surface (232) matching with the first conical surface (3113) is arranged on the lower end of the knife handle (23), and a second screw hole (233) corresponding to the first screw hole (3112) is arranged on the plane connecting the lower end of the knife handle (23) and the second conical surface (232); the first screw hole (3112) and the second screw hole (233) are used for installing screws to fix the ultrasonic vibrator (31) and the knife handle (23).

8. The contact-type power transmission ultrasonic machine tool processing device according to claim 5, characterized in that: The side wall of the insulating sleeve (24) is provided with a first through slot (241), the knife handle (23) is provided with a second through slot (234) corresponding to the first through slot (241), the second through slot (234) is connected to the cavity (231), a wire slot (235) is provided in the cavity (231), and the second through slot (234) passes through the bottom wall of the wire slot (235).

9. The contact-type power transmission ultrasonic machining device according to claim 5, characterized in that: A third conical surface (236) is arranged on the outer side of the upper part of the tool handle (23), and the machine tool electric spindle (1) is provided with an inner conical surface that cooperates with and contacts the third conical surface (236); a groove (237) for transmitting torque is arranged on the outer side of the middle part of the tool handle (23), and a key block (11) assembled with the groove (237) is arranged at the lower end of the machine tool electric spindle (1).

10. A method for transmitting electric energy to a contact-type electric energy transmission ultrasonic machine tool processing device, characterized in that: The contact-type power transmission ultrasonic machine tool processing device according to any one of claims 1 to 9 further comprises the following steps: S01, an external ultrasonic power source transmits electrical energy to the carbon fiber bundle; S02, the carbon fiber bundle contacts the surface of the copper ring through the brush to transfer electrical energy to the copper ring; S03, the copper ring transmits electrical energy to the ultrasonic vibrator through the wire; S04. The ultrasonic vibrator converts electrical energy into mechanical energy in the form of ultrasonic vibration and transmits the ultrasonic vibration to the tool.

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