Ultrasonic spindle unit and numerical control machine tool

Abstract

This invention provides an ultrasonic spindle unit and a CNC machine tool. The ultrasonic spindle unit includes a body, a spindle core, a tool holder, an ultrasonic transducer, a first power supply module, and a second power supply module. The tool holder is connected to one end of the spindle core, and the ultrasonic transducer is installed inside the tool holder. The ultrasonic spindle unit has a first mode, a second mode, and a third mode. In terms of amplitude and / or frequency, any two of the first ultrasonic wave in the first mode, the second ultrasonic wave in the second mode, and the third ultrasonic wave in the third mode are different. The ultrasonic spindle unit may also include a third power supply module to provide more machining modes. The ultrasonic spindle unit of this invention can machine workpieces using various different ultrasonic waves.

Description

Technical Field

[0001] This invention relates to the field of CNC machining equipment technology, and in particular to an ultrasonic spindle unit and a CNC machine tool. Background Technology

[0002] Ultrasonic machining is widely used in the processing of non-metallic, hard, and brittle materials, as well as in the machining of micro-holes and deep holes. Ultrasonic machining can be performed using an ultrasonic spindle. The tool holder of an ultrasonic spindle typically contains an ultrasonic transducer, which causes the tool mounted on the tool holder to vibrate under the influence of ultrasonic waves. In this way, ultrasonic machining can be performed on the workpiece when the tool comes into contact with it.

[0003] However, in existing technologies, most ultrasonic spindles can only use a single ultrasonic wave, which severely limits their applicability. There is also an existing ultrasonic spindle that can use two different ultrasonic waves for processing, but this type of ultrasonic spindle can only perform ultrasonic processing in half-wavelength and full-wavelength cases, and the types of ultrasonic waves that can be used are still limited, further restricting its applicability. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes an ultrasonic spindle unit that can use various ultrasonic waves to process workpieces, and the ultrasonic spindle unit has a wide range of applications.

[0005] The present invention also proposes a CNC machine tool including the above-mentioned ultrasonic spindle unit.

[0006] An ultrasonic spindle unit according to a first aspect of the present invention includes: a body; a shaft core, a portion of which passes through the interior of the body and is rotatable relative to the body; a tool holder connected to one end of the shaft core; an ultrasonic transducer installed inside the tool holder, the ultrasonic transducer being used to output ultrasonic waves to the tool holder; a first power supply module installed inside the body, the first power supply module being electrically connected to the ultrasonic transducer; a second power supply module installed inside the body, the second power supply module being electrically connected to the ultrasonic transducer, and both the first power supply module and the second power supply module being used to connect to an ultrasonic power source; the ultrasonic spindle unit has a first mode, a second mode, and a third mode; when... When the ultrasonic spindle unit is in the first mode, the ultrasonic power supply powers the ultrasonic transducer through the first power supply module, and the ultrasonic wave output by the ultrasonic transducer is a first ultrasonic wave; when the ultrasonic spindle unit is in the second mode, the ultrasonic power supply powers the ultrasonic transducer through the second power supply module, and the ultrasonic wave output by the ultrasonic transducer is a second ultrasonic wave; when the ultrasonic spindle unit is in the third mode, the ultrasonic power supply powers the ultrasonic transducer through the first power supply module and the second power supply module, and the ultrasonic wave output by the ultrasonic transducer is a third ultrasonic wave; in terms of amplitude and / or frequency, any two of the first ultrasonic wave, the second ultrasonic wave, and the third ultrasonic wave are different.

[0007] The ultrasonic spindle unit according to a first aspect embodiment of the present invention has at least the following advantages: the ultrasonic spindle unit of the present invention can use two or more ultrasonic waves to process workpieces. Compared with the prior art, the ultrasonic spindle unit of the present invention can use a wider variety of ultrasonic waves, and thus has a wider range of applications. The processing effect of the tool on the workpiece mainly depends on the frequency and amplitude of the ultrasonic waves. Since the ultrasonic spindle unit of the present invention can use multiple ultrasonic waves to process workpieces, it can achieve a variety of different processing effects.

[0008] According to some embodiments of the present invention, the ultrasonic spindle unit further includes a third power supply module, which is installed inside the main body and electrically connected to the ultrasonic transducer. The third power supply module is also used to connect to the ultrasonic power supply. The ultrasonic spindle unit further has a fourth mode, a fifth mode, a sixth mode, and a seventh mode. When the ultrasonic spindle unit is in the fourth mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the third power supply module, and the ultrasonic wave output by the ultrasonic transducer is the fourth ultrasonic wave. When the ultrasonic spindle unit is in the fifth mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the first power supply module and the third power supply module, and the ultrasonic wave output by the ultrasonic transducer is the fourth ultrasonic wave. The ultrasonic waves output by the transducer are the fifth ultrasonic waves; when the ultrasonic spindle unit is in the sixth mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the second power supply module and the third power supply module, and the ultrasonic waves output by the ultrasonic transducer are the sixth ultrasonic waves; when the ultrasonic spindle unit is in the seventh mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the first power supply module, the second power supply module and the third power supply module, and the ultrasonic waves output by the ultrasonic transducer are the seventh ultrasonic waves; wherein, in terms of amplitude and / or frequency, any two of the first ultrasonic waves, the second ultrasonic waves, the third ultrasonic waves, the fourth ultrasonic waves, the fifth ultrasonic waves, the sixth ultrasonic waves and the seventh ultrasonic waves are different.

[0009] According to some embodiments of the present invention, the first power supply module includes a first power supply coil and a first power receiving coil, the first power supply coil and the first power receiving coil being magnetically coupled; the second power supply module includes a second power supply coil and a second power receiving coil, the second power supply coil and the second power receiving coil being magnetically coupled.

[0010] According to some embodiments of the present invention, the first power supply module and the second power supply module are distributed along the axial direction of the shaft core; wherein, the first power supply coil and the first power receiving coil are distributed along the radial direction of the shaft core, and the second power supply coil and the second power receiving coil are distributed along the radial direction of the shaft core; or, the first power supply coil and the first power receiving coil are distributed along the axial direction of the shaft core, and the second power supply coil and the second power receiving coil are distributed along the axial direction of the shaft core.

[0011] According to some embodiments of the present invention, the ultrasonic spindle unit further includes: an end face limiting key, fixedly connected to the shaft core, a limiting notch is provided on the outer surface of the tool holder, and the end face limiting key is disposed in the limiting notch so that the shaft core and the tool holder can rotate synchronously; an insulating strip connected to the outer surface of the tool holder; a first conductive strip connected to the side of the insulating strip opposite to the tool holder, and the first conductive strip is electrically connected to the ultrasonic transducer; a second conductive strip connected to the side of the insulating strip opposite to the tool holder, and the second conductive strip is electrically connected to the ultrasonic transducer; a first conductive component connected to the end face limiting key, the first conductive component abutting against and conducting with the first conductive strip, and the first conductive component is also electrically connected to the first power supply module; and a second conductive component connected to the end face limiting key, the second conductive component abutting against and conducting with the second conductive strip, and the second conductive component is also electrically connected to the second power supply module.

[0012] According to some embodiments of the present invention, the first conductive component includes a first fixed portion, a first movable portion, and a first elastic portion. The first movable portion is movably connected to the first fixed portion. Both ends of the first elastic portion are respectively connected to the first fixed portion and the first movable portion. The elastic force of the first elastic portion is used to keep the first movable portion in contact with the first conductive strip. The first power supply module is electrically connected to the first fixed portion or the first movable portion. The second conductive component includes a second fixed portion, a second movable portion, and a second elastic portion. The second movable portion is movably connected to the second fixed portion. Both ends of the second elastic portion are respectively connected to the second fixed portion and the second movable portion. The elastic force of the second elastic portion is used to keep the second movable portion in contact with the second conductive strip. The second power supply module is electrically connected to the second fixed portion or the second movable portion.

[0013] According to some embodiments of the present invention, the ultrasonic spindle unit further includes: an end face limiting key, fixedly connected to the shaft core, a limiting notch being provided on the outer surface of the tool holder, the end face limiting key being disposed in the limiting notch so that the shaft core and the tool holder can rotate synchronously; an insulating strip connected to the outer surface of the tool holder; a first conductive strip connected to the side of the insulating strip opposite to the tool holder, the first conductive strip being electrically connected to the ultrasonic transducer; a second conductive strip connected to the side of the insulating strip opposite to the tool holder, the second conductive strip being electrically connected to the ultrasonic transducer; and a first conductive assembly. A first conductive component is connected to the end face limiting key, and abuts against and is electrically connected to the first conductive strip. The first conductive component is also electrically connected to the first power supply module. A second conductive component is connected to the end face limiting key, and abuts against and is electrically connected to the second conductive strip. The second conductive component is also electrically connected to the second power supply module. A conductive post is located inside the handle and is electrically connected to the ultrasonic transducer. A third conductive component is connected at one end to the end face limiting key and at the other end to abut against and be electrically connected to the conductive post. The third conductive component is also electrically connected to the third power supply module.

[0014] According to some embodiments of the present invention, the third conductive component includes: a third fixed part; a third movable part, the third movable part being movably connected to the third fixed part; a third elastic part, the two ends of the third elastic part being respectively connected to the third fixed part and the third movable part, the elasticity of the third elastic part being used to keep the third movable part in contact with the conductive post, and the third power supply module being electrically connected to the third fixed part or the third movable part.

[0015] According to some embodiments of the present invention, the ultrasonic spindle unit further includes an insulating post located inside the tool holder, the insulating post having a through mounting channel at both ends for passing a wire, the conductive post being inserted into one end of the mounting channel.

[0016] A CNC machine tool according to a second aspect of the present invention includes an ultrasonic spindle unit according to the first aspect of the present invention.

[0017] The CNC machine tool according to the second aspect of the present invention has at least the following beneficial effects: the CNC machine tool is capable of ultrasonic processing of workpieces, and can process workpieces using a variety of different ultrasonic waves, thus the CNC machine tool has a wide variety of processing effects.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a partial schematic diagram of the ultrasonic spindle unit according to the first embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram showing the connection relationship between the ultrasonic power supply, the first power supply module, and the second power supply module in the first embodiment of the present invention;

[0022] Figure 3 This is an exploded view of the ultrasonic spindle unit in the first embodiment of the present invention;

[0023] Figure 4 for Figure 3 A schematic diagram of the end face limiting key in the middle;

[0024] Figure 5 for Figure 4 A cross-sectional view of the end face limiting key in the middle;

[0025] Figure 6 for Figure 3 A cross-sectional view of the first conductive component in the process;

[0026] Figure 7 This is a schematic diagram showing the cooperative relationship between the first conductive component, the second conductive component, the first conductive strip, and the second conductive strip in the first embodiment of the present invention;

[0027] Figure 8 This is a cross-sectional view of the ultrasonic spindle unit according to the first embodiment of the present invention;

[0028] Figure 9 This is a cross-sectional view of the ultrasonic spindle unit according to the second embodiment of the present invention.

[0029] Figure label:

[0030] 100-Ultrasonic spindle unit, 101-Spindle core, 102-First power supply module, 103-First receiving core, 104-First receiving coil, 105-First power supply coil, 106-First power supply core, 107-Body, 108-Wire, 109-Rear bearing, 110-Front bearing, 111-Ultrasonic transducer, 112-Tool holder, 113-End face limit key, 114-Wire passage, 115-Front bearing seat, 116-Second receiving core, 117-Second power supply module, 118-Second power supply core, 119-Second power supply coil, 120-Second receiving coil, 121-Rear bearing seat, 122-Ultrasonic power supply;

[0031] 201-Limiting notch, 202-Insulating strip, 203-First conductive strip, 204-Mounting groove, 205-Second conductive strip, 206-First conductive component, 207-Second conductive component, 208-Second channel, 209-Boss, 210-Connecting part, 211-Second clearance hole, 212-First clearance hole, 213-First channel;

[0032] 301-First fixed part, 302-First movable part, 303-First elastic part, 304-Second fixed part, 305-Second movable part, 306-Second elastic part;

[0033] 401-Third conductive component, 402-Third fixed part, 403-Third movable part, 404-Third elastic part, 405-Conductive post, 406-Insulating post, 407-Mounting channel. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0036] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0038] Figure 1An ultrasonic spindle unit 100 according to a first embodiment of the present invention is shown. The ultrasonic spindle unit 100 includes a body 107, a spindle core 101, a tool holder 112, an ultrasonic transducer 111, a first power supply module 102, and a second power supply module 117.

[0039] like Figure 1 As shown, the body 107 is cylindrical, with a portion of the shaft core 101 passing through the interior of the body 107, and the front end of the shaft core 101 protruding from the exterior of the body 107. A tool can be mounted on the front end of a tool holder 112 (tool not shown), which is connected to the front end of the shaft core 101. The rear end of the shaft core 101 is used to connect to a motor (the rear end of the shaft core 101 and the motor are not shown), and the motor can drive the shaft core 101 to rotate relative to the body 107. The ultrasonic spindle unit 100 also includes a front bearing 110, a rear bearing 109, a front bearing housing 115, and a rear bearing housing 121, as shown... Figure 1 As shown, the front bearing housing 115 is connected to the front end of the body 107 and the front bearing 110 is installed inside the front bearing housing 115, as... Figure 2 As shown, the rear bearing housing 121 is connected to the rear end of the body 107, and the rear bearing 109 is installed inside the rear bearing housing 121. Both the front bearing 110 and the rear bearing 109 are sleeved on the outside of the shaft core 101, allowing the shaft core 101 to rotate relative to the body 107. An ultrasonic transducer 111 is installed inside the tool holder 112, and the ultrasonic transducer 111 outputs ultrasonic waves to the tool holder 112. Under the action of the ultrasonic waves, both the tool holder 112 and the tool mounted on it will vibrate. Depending on the parameters of the ultrasonic waves, the machining effect of the tool on the workpiece will also be different.

[0040] like Figure 1 As shown, both the first power supply module 102 and the second power supply module 117 are installed inside the main body 107, and both are electrically connected to the ultrasonic transducer 111. The electrical connection method between the first power supply module 102, the second power supply module 117, and the ultrasonic transducer 111 will be described in detail later. Figure 2 As shown, both the first power supply module 102 and the second power supply module 117 are connected to the ultrasonic power supply 122 (via wire 108). That is, the ultrasonic power supply 122 indirectly supplies power to the ultrasonic transducer 111 through the first power supply module 102 and / or the second power supply module 117. It should be noted that in this embodiment, the first power supply module 102 and the second power supply module 117 are connected to the same ultrasonic power supply 122. The ultrasonic power supply 122 has two sets of interfaces (interfaces not shown). The first power supply module 102 is connected to one set of interfaces, and the second power supply module 117 is connected through the other set of interfaces. The two sets of interfaces can output electrical energy of different frequencies, voltages, or currents respectively.

[0041] The structure of the first power supply module 102 is as follows: Figure 1 As shown. The first power supply module 102 includes a first power supply coil 105 and a first receiving coil 104. The first power supply coil 105 and the first receiving coil 104 are disposed inside the body 107 and outside the shaft core 101, and are magnetically coupled. "Magnetic coupling between the first power supply coil 105 and the first receiving coil 104" means that a change in current in the first power supply coil 105 will cause an induced electromotive force to be generated in the first receiving coil 104. The first power supply coil 105 is electrically connected to the ultrasonic power supply 122, and the first receiving coil 104 is electrically connected to the ultrasonic transducer 111. Therefore, when the ultrasonic power supply 122 supplies power to the first power supply coil 105, the first receiving coil 104 will generate an induced electromotive force to supply power to the ultrasonic transducer 111. To enhance the magnetic field, the first power supply module 102 may further include a first power supply core 106 and a first power receiving core 103. The first power supply core 106 is nested with the first power supply coil 105, and the first power receiving core 103 is nested with the first power receiving coil 104. Both the first power supply coil 105 and the first power receiving coil 104 are made of enameled wire. The first power supply coil 105 is wound around the first power supply core 106, and the first power receiving coil 104 is wound around the first power receiving core 103.

[0042] The structure of the second power supply module 117 is similar to that of the first power supply module 102, such as... Figure 1 As shown, the second power supply module 117 includes a second power supply coil 119 and a second power receiving coil 120. The second power supply coil 119 and the second power receiving coil 120 are disposed inside the body 107 and outside the shaft core 101, and are magnetically coupled. The second power supply coil 119 is electrically connected to the ultrasonic power supply 122, and the second power receiving coil 120 is electrically connected to the ultrasonic transducer 111. When the ultrasonic power supply 122 supplies power to the second power supply coil 119, the second power receiving coil 120 generates an induced electromotive force, thereby supplying power to the ultrasonic transducer 111. To enhance the magnetic field, the second power supply module 117 may further include a second electromagnetic core 118 and a second electromagnetic core 116, with the second electromagnetic core 118 nested within the second power supply coil 119 and the second electromagnetic core 116 nested within the second power receiving coil 120. The second power supply coil 119 and the second power receiving coil 120 can also be made of enameled wire, with the second power supply coil 119 wound on the second power supply core 118 and the second power receiving coil 120 wound on the second power receiving core 116. It should be noted that in some embodiments, the first power supply module 102 and the second power supply module 117 may differ in at least one of the following four aspects: the number of turns of the power supply coil, the number of turns of the power receiving coil, the diameter of the power supply coil, and the diameter of the power receiving coil.

[0043] like Figure 1As shown, the first power supply module 102 and the second power supply module 117 are distributed along the axial direction of the core 101, the first power supply coil 105 and the first power receiving coil 104 are distributed radially along the core 101, and the second power supply coil 119 and the second power receiving coil 120 are distributed radially along the core 101. This arrangement helps to reduce the length of the first power supply module 102 and the second power supply module 117 along the axial direction of the core 101, improving the structural compactness of the ultrasonic spindle unit 100 and preventing the body 107 and the core 101 from being too long. In some other embodiments, the first power supply coil 105 and the first power receiving coil 104 can be arranged to be distributed along the axial direction of the core 101, and the second power supply coil 119 and the second power receiving coil 120 can be arranged to be distributed along the axial direction of the core 101. This arrangement helps to reduce the required diameter of the body 107, thereby helping to reduce the diameter of the ultrasonic spindle unit 100.

[0044] The ultrasonic spindle unit 100 of the first embodiment has a first mode, a second mode, and a third mode. When the ultrasonic spindle unit 100 is in the first mode, the ultrasonic power supply 122 supplies power to the ultrasonic transducer 111 through the first power supply module 102, but does not supply power to the second power supply module 117; at this time, the ultrasonic wave output by the ultrasonic transducer 111 is the first ultrasonic wave. When the ultrasonic spindle unit 100 is in the second mode, the ultrasonic power supply 122 supplies power to the ultrasonic transducer 111 through the second power supply module 117, but does not supply power to the first power supply module 102; at this time, the ultrasonic wave output by the ultrasonic transducer 111 is the second ultrasonic wave. When the ultrasonic spindle unit 100 is in the third mode, the ultrasonic power supply 122 supplies power to the ultrasonic transducer 111 through both the first power supply module 102 and the second power supply module 117, that is, the ultrasonic power supply 122 simultaneously supplies power to both the first power supply module 102 and the second power supply module 117; at this time, the ultrasonic wave output by the ultrasonic transducer 111 is the third ultrasonic wave.

[0045] It should be noted that the third ultrasound can also be considered as the ultrasound formed by the superposition of the first and second ultrasounds. Any two of the first, second, and third ultrasounds may differ in amplitude; or any two of these three ultrasounds may differ in frequency; or any two of these three ultrasounds may differ in both frequency and amplitude.

[0046] The ultrasonic spindle unit 100 of the first embodiment of the present invention can use three different ultrasonic waves to process workpieces. Compared with the prior art, the ultrasonic spindle unit 100 can use a wider variety of ultrasonic waves, and its application range is broader. The processing effect of the tool on the workpiece mainly depends on the frequency and amplitude of the ultrasonic waves. Since the ultrasonic spindle unit 100 of the first embodiment of the present invention can use multiple ultrasonic waves to process workpieces, it can achieve a variety of different processing effects. In addition, the ultrasonic spindle unit 100 of the first embodiment can output ultrasonic frequencies and amplitudes that cannot be achieved by a single power supply module by using two power supply modules with different coil diameters and coil turns.

[0047] The electrical connection relationship between the first power supply module 102, the second power supply module 117, and the ultrasonic transducer 111 in the first embodiment will be described below.

[0048] Figure 3 An exploded view of a portion of the structure of the ultrasonic spindle unit 100 in the first embodiment is shown. (See attached image.) Figure 3 As shown, the ultrasonic spindle unit 100 also includes an end face limiting key 113, an insulating strip 202, a first conductive component 206, a second conductive component 207, a first conductive strip 203, and a second conductive strip 205. The first conductive strip 203 and the second conductive strip 205 are made of metal (e.g., copper).

[0049] Reference Figure 3 There are two end face limit keys 113, each end face limit key 113 is connected to a first conductive component 206 and a second conductive component 207. For example... Figure 4 As shown, the end face limiting key 113 includes a boss portion 209 and a connecting portion 210. (Refer to...) Figure 3 The connecting part 210 can be fixed to the front end of the shaft core 101 by screws (screws not shown). The outer surface of the tool holder 112 is provided with a limiting notch 201, and a boss 209 is disposed in the limiting notch 201, with the boss 209 abutting against the side wall of the limiting notch 201. In this way, when the shaft core 101 rotates, the shaft core 101, the end face limiting key 113, the tool holder 112, and the tool mounted on the tool holder 112 will all rotate synchronously. Figure 5 As shown, the end face limiting key 113 has a first channel 213 extending in the front-rear direction and a second channel 208 extending in the left-right direction. The second channel 208 is through at both ends, and the front end of the first channel 213 is connected to the second channel 208. Furthermore, as... Figure 7As shown, the first conductive component 206 is inserted into the left end of the second channel 208, and the second conductive component 207 is inserted into the right end of the second channel 208. Furthermore, the end-face limiting key 113 is insulated and is made of plastic or other types of insulating material.

[0050] like Figure 3 As shown, two insulating strips 202 are provided, and the insulating strips 202 are connected to the outer surface of the tool holder 112. The insulating strips 202 can be made of plastic or other types of insulating materials. The first conductive strip 203 and the second conductive strip 205 are both connected to the side of the insulating strips 202 that faces away from the tool holder 112. Specifically, as... Figure 3 As shown, the insulating strip 202 is provided with a mounting groove 204, and the first conductive strip 203 and the second conductive strip 205 are disposed in the mounting groove 204. The insulating strip 202 is provided with a first clearance hole 212, and the knife handle 112 is provided with a second clearance hole 211. The first clearance hole 212 and the second clearance hole 211 are aligned with each other and connected (e.g., Figure 8 (As shown). A gap exists between a first conductive strip 203 and a second conductive strip 205 mounted on the same insulating strip 202, and this gap is aligned with the first clearance hole 212. Figure 8 As shown, each first conductive component 206 abuts against and is electrically connected to a first conductive strip 203, and each second conductive component 207 abuts against and is electrically connected to a second conductive strip 205.

[0051] The ultrasonic spindle unit 100 also includes multiple wires 108. A first receiving coil 104 is connected to a first conductive component 206 via one wire 108, and the first receiving coil 104 is connected to another first conductive component 206 via another wire 108. Similarly, a second receiving coil 120 is connected to a second conductive component 207 via one wire 108, and the second receiving coil 120 is connected to another second conductive component 207 via another wire 108. Figure 1 As shown, the shaft core 101 has a wire passage 114, in which the wires 108 for connecting the first receiving coil 104 and the second receiving coil 120 can be disposed. Figure 5 As shown, the first channel 213 and the second channel 208 can also allow the wire 108 to pass through. Figure 8 As shown, the handle 112 is hollow inside. The wire 108 used to connect the first conductive strip 203 and the ultrasonic transducer 111 can pass through the first clearance hole 212 and the second clearance hole 211, and then into the interior of the handle 112. Similarly, the wire 108 used to connect the second conductive strip 205 and the ultrasonic transducer 111 can pass through the first clearance hole 212 and the second clearance hole 211, and then into the interior of the handle 112.

[0052] The first receiving coil 104, the first conductive component 206, the first conductive strip 203, and the ultrasonic transducer 111 together form a circuit that allows current to pass through. If this circuit is referred to as the first circuit, then current will pass through the first circuit when the ultrasonic spindle unit 100 is in the first mode or the third mode. Similarly, the second receiving coil 120, the second conductive component 207, the second conductive strip 205, and the ultrasonic transducer 111 together form a circuit that allows current to pass through. If this circuit is referred to as the second circuit, then current will pass through the second circuit when the ultrasonic spindle unit 100 is in the second mode or the third mode.

[0053] Reference Figure 8 In the circumferential direction of the tool holder 112, the first conductive strip 203 and the second conductive strip 205 are alternately arranged. This results in a greater distance between the two first conductive strips 203 connected to the two ends of the first energized coil 104, making it less likely for the two first conductive strips 203 to come into direct contact and short-circuit. Similarly, the greater distance between the two second conductive strips 205 connected to the two ends of the second energized coil 120 also makes it less likely for the two second conductive strips 205 to come into direct contact and short-circuit. Furthermore, the first conductive strip 203 and the second conductive strip 205 are spaced apart in the circumferential direction of the tool holder 112, thus minimizing interference between the first and second circuits.

[0054] The end face limit key 113 is exposed on the outside of the body 107 (e.g., Figure 1 As shown, the first conductive strip 203, the second conductive strip 205, the first conductive component 206, the second conductive component 207, and the insulating strip 202 are all disposed on the outside of the main body 107. This arrangement can reduce the number of components that need to be accommodated inside the main body 107, thereby reducing the structural complexity of the ultrasonic spindle unit 100.

[0055] The structure of the first conductive component 206 is as follows: Figure 6 As shown, the first conductive component 206 includes a first fixed portion 301, a first movable portion 302, and a first elastic portion 303. Both the first fixed portion 301 and the first movable portion 302 are conductors; for example, both are made of copper. The first elastic portion 303 can also be a conductor, and it can be configured as a spring. Figure 7 As shown, the outer peripheral surface of the first fixing part 301 abuts against the inner wall surface of the second channel 208. (As indicated...) Figure 6As shown, the first fixed part 301 is cylindrical, a portion of the first movable part 302 is disposed inside the first fixed part 301, and the other portion of the first movable part 302 protrudes outside the first fixed part 301. The first movable part 302 is spherical and is movably connected to the first fixed part 301, allowing it to slide. The two ends of the first elastic part 303 abut against the first fixed part 301 and the first movable part 302, respectively. Figure 7 As shown, the first elastic part 303 is in a compressed state, and the elastic force of the first elastic part 303 is used to push the first movable part 302 outward, thereby keeping the first movable part 302 in contact with the first conductive strip 203. In this embodiment, the first fixed part 301 is connected to the first receiving coil 104 via a wire 108. Of course, in other embodiments, the first movable part 302 may also be connected to the first receiving coil 104 via a wire 108, which can pass through the interior of the first fixed part 301 and connect to the first movable part 302.

[0056] The structure of the second conductive component 207 is similar to that of the first conductive component 206. For example... Figure 7 As shown, the second conductive component 207 includes a second fixed portion 304, a second movable portion 305, and a second elastic portion 306. The second fixed portion 304 and the second movable portion 305 are conductors, and the second elastic portion 306 can be configured as a spring. The outer peripheral surface of the second fixed portion 304 abuts against the inner wall surface of the second channel 208. The second fixed portion 304 is cylindrical, and the second movable portion 305 is spherical. A portion of the second movable portion 305 is disposed inside the second fixed portion 304, and the other portion of the second movable portion 305 protrudes outside the second fixed portion 304. The second movable portion 305 is movably connected to the second fixed portion 304 and can slide. Both ends of the second elastic portion 306 abut against the second fixed portion 304 and the second movable portion 305, respectively. The second elastic portion 306 is in a compressed state, and its elastic force is used to keep the second movable portion 305 in contact with the second conductive strip 205. In this embodiment, the second fixed portion 304 is connected to the second receiving coil 120 via a wire 108. In other embodiments, the second movable part 305 may be connected to the second power receiving coil 120 via a wire 108, which may pass through the interior of the second fixed part 304 and be connected to the second movable part 305.

[0057] Since the first movable part 302 can slide relative to the first fixed part 301, the first conductive component 206 and the first conductive strip 203 are less prone to severe collisions and wear, which helps to improve the service life of the first conductive component 206 and the first conductive strip 203. The first elastic part 303 keeps the first movable part 302 and the first conductive strip 203 in close contact, which helps to improve the stability of the electrical connection between the first conductive component 206 and the first conductive strip 203.

[0058] Similarly, since the second movable part 305 can slide relative to the second fixed part 304, the second conductive component 207 and the second conductive strip 205 are less prone to severe collisions and wear, which helps to improve the service life of the second conductive component 207 and the second conductive strip 205. The second elastic part 306 keeps the second movable part 305 and the second conductive strip 205 in contact, which helps to improve the stability of the electrical connection between the second conductive component 207 and the second conductive strip 205.

[0059] Figure 9 An ultrasonic spindle unit 100 according to a second embodiment of the present invention is shown. The main difference between the second embodiment and the first embodiment is that the ultrasonic spindle unit 100 in the second embodiment further includes a third power supply module (the third power supply module is not shown in the drawings).

[0060] The third power supply module is installed inside the main body 107. The third power supply module is electrically connected to the ultrasonic transducer 111 and is also used for electrical connection to the ultrasonic power supply 122. The third power supply module may include a third power supply coil and a third power receiving coil arranged radially along the shaft core 101. The third power supply coil and the third power receiving coil are magnetically coupled. The third power supply coil is electrically connected to the ultrasonic power supply 122 via a wire 108, and the third power receiving coil is electrically connected to the ultrasonic transducer 111 via a wire 108. The first power supply module 102, the second power supply module 117, and the third power supply module are distributed axially along the shaft core 101.

[0061] In addition to the first, second, and third modes, the ultrasonic spindle unit 100 of the second embodiment also has a fourth, fifth, sixth, and seventh mode. When the ultrasonic spindle unit 100 is in the fourth mode, the ultrasonic power supply 122 supplies power to the ultrasonic transducer 111 only through the third power supply module, and the ultrasonic wave output by the ultrasonic transducer 111 is the fourth ultrasonic wave. When the ultrasonic spindle unit 100 is in the fifth mode, the ultrasonic power supply 122 supplies power to the ultrasonic transducer 111 through the first power supply module 102 and the third power supply module, while the second power supply module 117 does not participate in power supply, and the ultrasonic wave output by the ultrasonic transducer 111 is the fifth ultrasonic wave. When the ultrasonic spindle unit 100 is in the sixth mode, the ultrasonic power supply 122 supplies power to the ultrasonic transducer 111 through the second power supply module 117 and the third power supply module, while the first power supply module 102 does not participate in power supply, and the ultrasonic wave output by the ultrasonic transducer 111 is the sixth ultrasonic wave. When the ultrasonic spindle unit 100 is in the seventh mode, the ultrasonic power supply 122 supplies power to the ultrasonic transducer 111 through the first power supply module 102, the second power supply module 117 and the third power supply module, and the ultrasonic wave output by the ultrasonic transducer 111 is the seventh ultrasonic wave.

[0062] Specifically, any two of the first to seventh ultrasonic waves differ in amplitude; or, any two of the first to seventh ultrasonic waves differ in frequency; or, any two of the first to seventh ultrasonic waves differ in both frequency and amplitude. It should be noted that the fifth ultrasonic wave is equivalent to the ultrasonic wave formed by the superposition of the first and third ultrasonic waves, the sixth ultrasonic wave is equivalent to the ultrasonic wave formed by the superposition of the second and third ultrasonic waves, and the seventh ultrasonic wave is equivalent to the ultrasonic wave formed by the superposition of the first, second, and third ultrasonic waves.

[0063] Compared to the first embodiment, the ultrasonic spindle unit 100 of the second embodiment adds a power supply module, thereby providing more processing modes. In other embodiments, the number of power supply modules can be set to more (more than three) to further increase the number of processing modes of the ultrasonic spindle unit 100.

[0064] Reference Figure 9In the second embodiment, the electrical connection between the first power supply module 102, the second power supply module 117, and the ultrasonic transducer 111 is the same as in the first embodiment. The ultrasonic spindle unit 100 in the second embodiment also includes two third conductive components 401 and two conductive posts 405. The conductive posts 405 are disposed inside the handle 112 and are electrically connected to the ultrasonic transducer 111 via wires 108. One end of each third conductive component 401 is connected to the end face limiting key 113, and the other end of each third conductive component 401 abuts against and communicates with the conductive posts 405. The third conductive component 401 is electrically connected to the ultrasonic transducer 111 via wires 108. More specifically, one end of a third receiving coil is electrically connected to one of the third conductive components 401, and the other end of the third receiving coil is electrically connected to the other third conductive component 401. In this configuration, the third conductive components 401 and conductive posts 405 are disposed inside the handle 112 without occupying the outer surface of the handle 112, resulting in a more compact structure for the ultrasonic spindle unit 100.

[0065] The structure of the third conductive component 401 is similar to that of the first conductive component 206. For example... Figure 9 As shown, the third conductive component 401 includes a third fixed portion 402, a third movable portion 403, and a third elastic portion 404. Both the third fixed portion 402 and the third movable portion 403 are conductors, and the third elastic portion 404 can be configured as a spring. The third fixed portion 402 is cylindrical, and the third movable portion 403 is spherical, with the third movable portion 403 movably connected to the third fixed portion 402. The two ends of the third elastic portion 404 are connected to the third fixed portion 402 and the third movable portion 403, respectively, and the elastic force of the third elastic portion 404 is used to keep the third movable portion 403 in contact with the conductive post 405. The third receiving coil of the third power supply module is electrically connected to either the third fixed portion 402 or the third movable portion 403.

[0066] Reference Figure 9 The ultrasonic spindle unit 100 also includes an insulating post 406, which is made of insulating material. The insulating post 406 has a through-hole mounting channel 407 at both ends. A wire 108 connecting the ultrasonic transducer 111 and the conductive post 405 can pass through the mounting channel 407, and the conductive post 405 is inserted into one end of the mounting channel 407. The insulating post 406 is inserted into the handle 112, with its outer circumferential surface abutting against the handle 112. The insulating post 406 provides a mounting position for the conductive post 405, fixing its position to prevent direct contact between the conductive post 405 and the handle 112, thus preventing the handle 112 from becoming energized. Furthermore, the mounting channel 407 facilitates the routing of the wires 108 inside the handle 112.

[0067] The ultrasonic spindle unit 100 in any of the above embodiments can be applied to a CNC machine tool. In addition to the ultrasonic spindle unit 100, the CNC machine tool may also include a motor, an ultrasonic power supply 122, and a cutting tool. The ultrasonic power supply 122 is used to supply power to the power supply module, the cutting tool is mounted on the front end of the tool holder 112, and the motor is used to drive the spindle core 101 to rotate, thereby causing the cutting tool to rotate and process the workpiece.

[0068] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An ultrasonic spindle unit, characterized in that, include: ontology; A shaft, a portion of which passes through the interior of the body, is rotatable relative to the body; The tool holder is connected to one end of the shaft core; An ultrasonic transducer is installed inside the tool holder, and the ultrasonic transducer is used to output ultrasonic waves to the tool holder; The first power supply module is installed inside the main body and is electrically connected to the ultrasonic transducer. The second power supply module is installed inside the main body. The second power supply module is electrically connected to the ultrasonic transducer. Both the first power supply module and the second power supply module are used to connect to the ultrasonic power supply. An end face limiting key is fixedly connected to the shaft core. The outer surface of the tool holder is provided with a limiting notch, and the end face limiting key is disposed in the limiting notch so that the shaft core and the tool holder can rotate synchronously. An insulating strip is attached to the outer surface of the knife handle; A first conductive strip is connected to the side of the insulating strip opposite to the handle, and the first conductive strip is electrically connected to the ultrasonic transducer. The second conductive strip is connected to the side of the insulating strip opposite to the knife handle, and the second conductive strip is electrically connected to the ultrasonic transducer; A first conductive component is connected to the end face limiting key. The first conductive component abuts against the first conductive strip and is mutually conductive. The first conductive component is also electrically connected to the first power supply module. The second conductive component is connected to the end face limiting key. The second conductive component abuts against the second conductive strip and is mutually conductive. The second conductive component is also electrically connected to the second power supply module. The ultrasonic spindle unit has a first mode, a second mode, and a third mode; When the ultrasonic spindle unit is in the first mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the first power supply module, and the ultrasonic wave output by the ultrasonic transducer is the first ultrasonic wave. When the ultrasonic spindle unit is in the second mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the second power supply module, and the ultrasonic wave output by the ultrasonic transducer is the second ultrasonic wave. When the ultrasonic spindle unit is in the third mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the first power supply module and the second power supply module, and the ultrasonic wave output by the ultrasonic transducer is the third ultrasonic wave. In terms of amplitude and / or frequency, any two of the first, second, and third ultrasonic waves are different.

2. The ultrasonic spindle unit according to claim 1, characterized in that, The ultrasonic spindle unit also includes a third power supply module, which is installed inside the main body. The third power supply module is electrically connected to the ultrasonic transducer and is used to connect to the ultrasonic power supply. The ultrasonic spindle unit also has a fourth mode, a fifth mode, a sixth mode, and a seventh mode; When the ultrasonic spindle unit is in the fourth mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the third power supply module, and the ultrasonic wave output by the ultrasonic transducer is the fourth ultrasonic wave. When the ultrasonic spindle unit is in the fifth mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the first power supply module and the third power supply module, and the ultrasonic wave output by the ultrasonic transducer is the fifth ultrasonic wave. When the ultrasonic spindle unit is in the sixth mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the second power supply module and the third power supply module, and the ultrasonic wave output by the ultrasonic transducer is the sixth ultrasonic wave. When the ultrasonic spindle unit is in the seventh mode, the ultrasonic power supply supplies power to the ultrasonic transducer through the first power supply module, the second power supply module and the third power supply module, and the ultrasonic wave output by the ultrasonic transducer is the seventh ultrasonic wave. Wherein, in terms of amplitude and / or frequency, any two of the first ultrasonic wave, the second ultrasonic wave, the third ultrasonic wave, the fourth ultrasonic wave, the fifth ultrasonic wave, the sixth ultrasonic wave, and the seventh ultrasonic wave are different.

3. The ultrasonic spindle unit according to claim 1, characterized in that, The first power supply module includes a first power supply coil and a first power receiving coil, and the first power supply coil and the first power receiving coil are magnetically coupled. The second power supply module includes a second power supply coil and a second power receiving coil, and the second power supply coil and the second power receiving coil are magnetically coupled.

4. The ultrasonic spindle unit according to claim 3, characterized in that, The first power supply module and the second power supply module are distributed along the axial direction of the shaft core; Wherein, the first power supply coil and the first power receiving coil are distributed radially along the shaft core, and the second power supply coil and the second power receiving coil are distributed radially along the shaft core; or, the first power supply coil and the first power receiving coil are distributed axially along the shaft core, and the second power supply coil and the second power receiving coil are distributed axially along the shaft core.

5. The ultrasonic spindle unit according to claim 1, characterized in that, The first conductive component includes a first fixed part, a first movable part, and a first elastic part. The first movable part is movably connected to the first fixed part. The two ends of the first elastic part are respectively connected to the first fixed part and the first movable part. The elastic force of the first elastic part is used to keep the first movable part in contact with the first conductive strip. The first power supply module is electrically connected to the first fixed part or the first movable part. The second conductive component includes a second fixed part, a second movable part, and a second elastic part. The second movable part is movably connected to the second fixed part. The two ends of the second elastic part are respectively connected to the second fixed part and the second movable part. The elastic force of the second elastic part is used to keep the second movable part in contact with the second conductive strip. The second power supply module is electrically connected to the second fixed part or the second movable part.

6. The ultrasonic spindle unit according to claim 2, characterized in that, The ultrasonic spindle unit also includes: A conductive post is located inside the knife handle and is electrically connected to the ultrasonic transducer. The third conductive component has one end connected to the end face limiting key and the other end set to abut against the conductive post and be mutually conductive. The third conductive component is also electrically connected to the third power supply module.

7. The ultrasonic spindle unit according to claim 6, characterized in that, The third conductive component includes: Third fixing part; The third movable part is movably connected to the third fixed part; The third elastic part has two ends connected to the third fixed part and the third movable part, respectively. The elasticity of the third elastic part is used to keep the third movable part in contact with the conductive post. The third power supply module is electrically connected to the third fixed part or the third movable part.

8. The ultrasonic spindle unit according to claim 6, characterized in that, The ultrasonic spindle unit also includes an insulating post located inside the tool holder. The insulating post has a through-hole mounting channel at both ends for wires to pass through. The conductive post is inserted into one end of the mounting channel.

9. A CNC machine tool, characterized in that, Includes the ultrasonic spindle unit as described in any one of claims 1 to 8.

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