A magnetic suspension centering magnetostrictive positioning double positioning ultrasonic vibration machining system

Abstract

The application discloses a kind of magnetic suspension centering magnetostrictive positioning double-positioning ultrasonic vibration processing systems, and the application relates to the technical field of ultrasonic vibration processing, magnetic suspension technology, magnetostrictive positioning technology.The system mainly includes: ultrasonic vibrator part, magnetic suspension device part, magnetostrictive positioning part.The system can realize the ultrasonic vibration excitation of different distance large-size cutters in the prior art, improve the manufacturing efficiency of deep cavity construction.The application uses magnetostrictive positioning device to realize the free adjustment of axial distance and the positioning of rotating spindle in work, realizes the forward movement of inductive power supply device and the ultrasonic vibration power supply of long-distance axial adjustment;The magnetic repulsion force generated by the electromagnetic part and the permanent magnet part offsets the weight of the device, improves the stability of the system in the processing process.

Description

Technical Field

[0001] This invention relates to the fields of ultrasonic vibration processing, magnetic levitation technology and magnetostrictive positioning technology, and in particular to ultrasonic vibration processing systems for ceramic materials and hard and brittle materials. Background Technology

[0002] Currently, the processing of large-size ceramic radomes and carbon-ceramic nozzles using conventional milling and grinding methods is inefficient and has a long processing cycle. To improve processing efficiency, ultrasonic vibration machining is adopted, which can significantly improve processing efficiency. However, due to the large size of the workpiece and the depth of the internal cavity, ultrasonic vibration machining with an extended spindle is difficult to achieve with ordinary ultrasonic vibrators that can accurately and significantly apply vibration to the tool. At the same time, the high-speed rotation of the spindle limits the installation of ultrasonic vibration equipment.

[0003] Therefore, there is a wide demand for a dual-positioning ultrasonic vibration machining system that can move with the tool, has high positioning accuracy, and can stably apply ultrasonic vibration. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-positioning ultrasonic vibration machining system with magnetic levitation centering and magnetostrictive positioning to solve the problems existing in the prior art, thereby improving the accuracy and stability of vibrator installation and realizing efficient ultrasonic vibration machining under spindles of different lengths.

[0005] The present invention discloses a dual-positioning ultrasonic vibration machining system with magnetic levitation centering and magnetostrictive positioning, comprising a machine tool spindle, a magnetostrictive positioning device, an ultrasonic vibration device, a cutting tool, and a magnetic levitation device; the magnetostrictive positioning device is fastened to the machine tool spindle through a magnetostrictive material, the magnetostrictive positioning device and the magnetic levitation device are connected by bearings, the magnetic levitation device is fixedly connected to the ultrasonic vibration device, and the ultrasonic vibration device is fixedly connected to the cutting tool.

[0006] Furthermore, the magnetostrictive positioning device includes a magnetostrictive retaining ring, an electromagnetic induction coil, a connecting ring and a connecting rod, a power supply compartment, and a connecting bearing; the electromagnetic induction coil is wound around the telescopic support leg of the magnetostrictive retaining ring, and the magnetostrictive retaining ring is fixedly connected to the connecting bearing through the connecting ring and the connecting rod; the electromagnetic induction coil is connected to the power supply compartment.

[0007] Furthermore, the magnetostrictive retaining ring consists of a non-magnetic ring and telescopic legs, the latter being made of magnetostrictive material. When the power supply compartment is powered off, the electromagnetic induction coil has no magnetic field, and the telescopic legs in the magnetostrictive retaining ring are in a retracted state, with a certain gap between them and the machine tool spindle. When the power supply compartment is powered on, the electromagnetic induction coil generates an electromagnetic field, and the telescopic legs in the magnetostrictive retaining ring extend to the machine tool spindle under the influence of the magnetic field, clamping tightly against the machine tool spindle. When the machine tool spindle rotates, the machine tool spindle and the magnetostrictive retaining ring move synchronously without relative displacement.

[0008] Furthermore, the magnetic levitation centering magnetostrictive positioning dual-positioning ultrasonic vibration machining system also includes a stabilizer frame, which is mechanically connected to the inner ring of the connecting bearing. During the operation of the machine tool, the inner ring of the connecting bearing is kept stable and does not rotate.

[0009] Furthermore, the magnetic levitation device includes an electromagnetic ring, an induction coil, and a permanent magnet ring. The permanent magnet ring is fixedly connected to the machine tool spindle, and the electromagnetic ring contains an induction coil and is fixedly connected to the inner cavity of the connecting bearing.

[0010] Furthermore, the ultrasonic vibration device includes an ultrasonic induction power supply and an ultrasonic vibrator. The ultrasonic induction power supply is fixedly connected to the side of the electromagnetic ring, and the ultrasonic vibrator is fixedly connected to the cutting tool. The sensor of the ultrasonic vibrator is fixed on the tool holder and rotates together with the machine tool spindle during processing. The sensor of the ultrasonic vibrator is fixed on the top surface of the axial support positioning part of the magnetic levitation device and is spaced a certain distance from the machine tool spindle. When the machine tool spindle rotates, the sensor of the ultrasonic vibrator remains stationary. The sensor contains an induction coil, which can apply induced current of different frequencies after being energized, causing the sensor of the ultrasonic vibrator to drive the tool holder to vibrate.

[0011] Furthermore, the electromagnetic ring in the magnetic levitation device is connected to an independent control power supply to control the magnetic strength of the four quadrant electromagnetic coils. By adjusting the current intensity in the four quadrants of the electromagnetic ring, the magnitude of the repulsive force is controlled, thereby keeping the electromagnetic ring and the permanent magnet ring concentric. The ultrasonic induction power supply in the ultrasonic vibration device is connected to an independent control power supply to apply induced vibration.

[0012] Furthermore, the machine tool spindle is concentric with the magnetostrictive positioning device, ultrasonic vibration device, and magnetic levitation device.

[0013] Furthermore, the inner ring connecting the bearing, the electromagnetic ring, the ultrasonic induction power supply, and the machine tool spindle are concentric and move relatively independently, and the permanent magnet ring is fixed to the machine tool spindle by magnetic attraction.

[0014] Furthermore, when the machine tool is running, the magnetostrictive positioning device grips the machine tool spindle and rotates synchronously without axial or circumferential offset. The stabilizer ensures that the inner ring of the connecting bearing does not move. The connecting bearing is fixedly connected to the electromagnetic ring and the ultrasonic induction power supply, and remains stable and motionless when the machine tool is in motion. The permanent magnet ring rotates synchronously with the machine tool spindle, and the ultrasonic vibrator and the tool rotate with the machine tool spindle. At the same time, the ultrasonic vibrator is induced by the ultrasonic induction power supply to perform ultrasonic vibration, which drives the tool to vibrate synchronously.

[0015] The present invention achieves the following technical effects compared to the prior art:

[0016] This invention achieves a tight connection between the magnetostrictive positioning device and the main shaft by using magnetostrictive materials. The magnetostrictive positioning device and the magnetic levitation device are connected by bearings, which ensures the accuracy and stability of the axial positioning during vibration.

[0017] This invention eliminates mechanical friction between the spindle and the vibrator by electromagnetically levitating the ultrasonic vibration device with the spindle, ensuring that the vibrator and the spindle remain relatively stable during the machining process when the spindle rotates at high speed, thus achieving close matching and positioning between the non-rotating vibrator sensor and the rotating spindle.

[0018] This invention utilizes a magnetostrictive positioning device to achieve free adjustment of axial distance and positioning of the rotating spindle during operation, enabling forward movement of the inductive power supply device and long-distance axially adjustable ultrasonic vibration power supply; and utilizes the magnetic repulsion force generated by the electromagnetic part and the permanent magnet part to counteract the weight of the device and improve the system stability during the processing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a dual-positioning ultrasonic vibration machining system with magnetic levitation centering and magnetostrictive positioning according to the present invention.

[0020] Figure 2 This is a schematic diagram of a magnetic levitation device.

[0021] Figure 3 This is a schematic diagram of a magnetostrictive positioning device and an ultrasonic vibration device.

[0022] Figure 4 This is a schematic diagram of a magnetic levitation device. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] The present invention provides a dual-positioning ultrasonic vibration machining system for magnetic levitation, centering, magnetostrictive positioning, and traction, such as... Figure 1 , 2 As shown, the system includes a machine tool base 1, a stabilizer 2, a machine tool spindle 3, a magnetostrictive positioning device 4, an ultrasonic vibration device 5, a cutting tool 6, and a magnetic levitation device 7. The magnetostrictive positioning device 4 is clamped to the machine tool spindle 3 via a retaining ring after power is applied. The magnetostrictive positioning device 4 and the magnetic levitation device 7 are connected via bearings, and the inner ring of the bearings is fixedly connected to the machine tool base 1 via the stabilizer 2.

[0025] Magnetostrictive positioning device 4 Figure 3As shown, it mainly includes a magnetostrictive retaining ring 401, an electromagnetic induction coil 402, a connecting ring and a connecting rod 403, a power supply compartment 404, and a connecting bearing 405. The electromagnetic induction coil 402 is wound around the telescopic support leg of the magnetostrictive retaining ring 401, and the magnetostrictive retaining ring 401 is fixedly connected to the connecting bearing 405 through the connecting ring and the connecting rod 403.

[0026] The magnetostrictive retaining ring 401 consists of a non-magnetic ring and telescopic legs, the latter being made of magnetostrictive material. An electromagnetic induction coil 402 is connected to a power supply compartment 404. When the power supply compartment 404 is powered off, the electromagnetic induction coil 402 has no magnetic field, and the telescopic legs in the magnetostrictive retaining ring 401 are in a retracted state, with a certain gap between them and the machine tool spindle 3. When the power supply compartment 404 is powered on, the electromagnetic induction coil 402 generates an electromagnetic field, causing the telescopic legs in the magnetostrictive retaining ring 401 to extend and engage with the machine tool spindle 3 under the influence of the magnetic field. When the machine tool spindle 3 rotates, the machine tool spindle 3 and the magnetostrictive retaining ring 401 move synchronously without relative displacement.

[0027] The stabilizer 2 is mechanically connected to the inner ring of the connecting bearing 405, ensuring the stability of the inner ring of the connecting bearing 405 and preventing rotational displacement when the machine tool spindle 3 rotates during machine tool operation.

[0028] The magnetic levitation device 7 consists of a permanent magnet part and an electromagnetic part. The permanent magnet part is a ring-shaped permanent magnet fixed to the machine tool spindle 3, and the electromagnetic part is fixed to the machine tool spindle 3 via a magnetostrictive positioning device 4. When energized, currents of varying intensities are applied to generate an electromagnetic field, which produces an electromagnetic repulsion force with the permanent magnet part, thereby ensuring stable levitation of the axial support positioning part and preventing contact with the machine tool spindle 3. Specifically, the magnetic levitation device 7 is as follows... Figure 4 As shown, it mainly includes an electromagnetic ring 701, an induction coil 702, and a permanent magnet ring 703. The permanent magnet ring 703 is fixedly connected to the machine tool spindle 3. The electromagnetic ring 701 contains the induction coil 702 and is fixedly connected to the inner cavity of the connecting bearing 405.

[0029] Ultrasonic vibration device 5 Figure 3 As shown, the system mainly includes an ultrasonic induction power supply 501 and an ultrasonic vibrator 502. The ultrasonic induction power supply 501 is fixedly connected to the side of the electromagnetic ring 701, and the ultrasonic vibrator 502 is fixedly connected to the cutting tool 6. The sensor of the ultrasonic vibrator 502 is fixed to the tool holder of the cutting tool 6 and rotates together with the machine tool spindle 3 during machining. The sensor of the ultrasonic vibrator 502 is fixed to the top surface of the axial support positioning part of the magnetic levitation device 7, with a certain distance between it and the machine tool spindle 3. When the machine tool spindle 3 rotates, the sensor remains stationary. The sensor contains an induction coil, which can be energized to apply induced current of different frequencies, causing the sensor to drive the tool holder to vibrate.

[0030] In the magnetic levitation device 7, the electromagnetic ring 701 is connected to an external independent control power supply to control the magnetic strength of the four quadrant electromagnetic coils. In the ultrasonic vibration device 5, the ultrasonic induction power supply 501 is connected to an external independent control power supply to apply inductive vibration.

[0031] The machine tool spindle 3 is concentric with the magnetostrictive positioning device 4, the ultrasonic vibration device 5, and the magnetic levitation device 7. The inner ring of the connecting bearing 405, the electromagnetic ring 701, and the ultrasonic induction power supply 501 are concentric with the machine tool spindle 3 and move relatively independently. The permanent magnet ring 703 is fixed to the machine tool spindle 3 by magnetic attraction. By adjusting the current intensity in the four quadrants of the electromagnetic ring 701, the magnitude of the repulsive force is controlled, thereby keeping the electromagnetic ring 701 and the permanent magnet ring 703 concentric. Figure 4 As shown.

[0032] When the machine tool is running, the magnetostrictive positioning device 4 rotates synchronously with the machine tool spindle 3, without axial or circumferential offset. It is fixed by the stabilizer 2, ensuring that the inner ring of the connecting bearing 405 does not move. The connecting bearing 405 is fixedly connected to the electromagnetic ring 701 and the ultrasonic induction power supply 501, remaining stable and motionless during machine tool operation. The permanent magnet ring 703 rotates synchronously with the machine tool spindle 3, and the ultrasonic vibrator 502 and the cutting tool 6 rotate with the machine tool spindle 3. Simultaneously, the ultrasonic vibrator 502 is induced by the ultrasonic induction power supply 501, generating ultrasonic vibration that drives the cutting tool 6 to vibrate synchronously.

[0033] In one embodiment of the present invention, the working steps of the magnetic levitation centering magnetostrictive positioning dual-positioning ultrasonic vibration machining system are as follows:

[0034] Step 1: With the machining center in a stopped state, assemble and connect the ultrasonic vibration device 5, the magnetic levitation device 4, and the magnetostrictive positioning device 7 in sequence.

[0035] Step 2: Adjust the positions of the magnetostrictive retaining ring 401, the ultrasonic induction power supply 501, and the ultrasonic vibrator 502 so that the gap between the ultrasonic induction power supply 501 and the ultrasonic vibrator 502 is within a reasonable range.

[0036] Step 3: Turn on the power switch of the power compartment 404 to make the magnetostrictive retaining ring 401 clamp tightly with the machine tool spindle 3.

[0037] Step 4: Set the machine tool spindle 3 of the machining center to the machining speed, turn on the external power supply of the electromagnetic ring 701, and adjust the magnetic force intensity of the four quadrants to make the electromagnetic ring 701 and the permanent magnet ring 703 concentric.

[0038] Step 4: Turn on the control power of the ultrasonic induction power supply 501 and test the operation of the ultrasonic vibrator 502. If the vibration effect is not ideal, adjust the position of the ultrasonic vibrator 502 and fine-tune the gap between the ultrasonic induction power supply 501 and the ultrasonic vibrator 502.

[0039] Step 5: After debugging, begin processing.

[0040] The specific embodiments of the present invention disclosed above are intended to help understand the content of the present invention and to implement it accordingly. Those skilled in the art will understand that various substitutions, changes, and modifications are possible without departing from the spirit and scope of the present invention. The present invention should not be limited to the content disclosed in the embodiments of this specification; the scope of protection of the present invention is defined by the claims.

Claims

1. A dual-positioning ultrasonic vibration machining system with magnetic levitation centering and magnetostrictive positioning, characterized in that, The system includes a machine tool spindle (3), a magnetostrictive positioning device (4), an ultrasonic vibration device (5), a cutting tool (6), and a magnetic levitation device (7). The magnetostrictive positioning device (4) is fastened to the machine tool spindle (3) via a magnetostrictive material. The magnetostrictive positioning device (4) and the magnetic levitation device (7) are connected by bearings. The magnetic levitation device (7) is fixedly connected to the ultrasonic vibration device (5), and the ultrasonic vibration device (5) is fixedly connected to the cutting tool (6). The magnetostrictive positioning device (4) includes a magnetostrictive retaining ring (401), an electromagnetic induction coil (402), a connecting ring and a connecting rod (403), a power supply compartment (404), and a connecting bearing (405). A coil (402) is wound around the telescopic support leg of the magnetostrictive retaining ring (401), and the magnetostrictive retaining ring (401) is fixedly connected to the connecting bearing (405) through a connecting ring and a connecting rod (403); the electromagnetic induction coil (402) is connected to the power supply compartment (404); the magnetic levitation device (7) includes an electromagnetic ring (701), an induction coil (702), and a permanent magnet ring (703), the permanent magnet ring (703) is fixedly connected to the machine tool spindle (3), the electromagnetic ring (701) contains an induction coil (702), and is fixedly connected to the inner cavity of the connecting bearing (405); the ultrasonic vibration device (5) includes an ultrasonic induction power supply (501) and an ultrasonic vibrator (502). The ultrasonic induction power supply (501) is fixedly connected to the side of the electromagnetic ring (701), and the ultrasonic vibrator (502) is fixedly connected to the cutting tool (6). The sensor of the ultrasonic vibrator (502) is fixed on the tool holder of the cutting tool (6) and rotates together with the machine tool spindle (3) during the machining process. The sensor of the ultrasonic vibrator (502) is fixed on the top surface of the axial support positioning part of the magnetic levitation device (7) and has a certain distance from the machine tool spindle (3). When the machine tool spindle (3) rotates, the sensor of the ultrasonic vibrator (502) remains stationary. The inside of the sensor is an induction coil. After being energized, it can apply induced current of different frequencies, so that the sensor of the ultrasonic vibrator (502) drives the tool holder to vibrate.

2. The magnetic levitation, centering, magnetostrictive, and dual-positioning ultrasonic vibration machining system according to claim 1, characterized in that: The magnetostrictive retaining ring (401) consists of a non-magnetic ring and telescopic legs. The telescopic legs are made of magnetostrictive material. When the power supply compartment (404) is turned off, the electromagnetic induction coil (402) has no magnetic field, and the telescopic legs in the magnetostrictive retaining ring (401) are in a retracted state, with a certain gap between them and the machine tool spindle (3). When the power supply compartment (404) is turned on, the electromagnetic induction coil (402) generates an electromagnetic field, and the telescopic legs in the magnetostrictive retaining ring (401) are affected by the magnetic field and extend to the machine tool spindle (3), hugging the machine tool spindle (3). When the machine tool spindle (3) rotates, the machine tool spindle (3) and the magnetostrictive retaining ring (401) move synchronously without relative displacement.

3. The magnetic levitation, centering, magnetostrictive, and dual-positioning ultrasonic vibration machining system according to claim 1, characterized in that: It also includes a stabilizer (2), which is mechanically connected to the inner ring of the connecting bearing (405) to ensure the stability of the inner ring of the connecting bearing (405) during the operation of the machine tool spindle (3) and prevent rotational displacement.

4. The magnetic levitation, centering, magnetostrictive, and dual-positioning ultrasonic vibration machining system according to claim 1, characterized in that: The electromagnetic ring (701) in the magnetic levitation device (7) is connected to an independent control power supply to control the magnetic strength of the electromagnetic coils in the four quadrants. By adjusting the current intensity in the four quadrants of the electromagnetic ring (701), the magnitude of the repulsive force is controlled, so that the electromagnetic ring (701) and the permanent magnet ring (703) remain concentric. The ultrasonic induction power supply (501) in the ultrasonic vibration device (5) is connected to an independent control power supply to apply induction vibration.

5. The magnetic levitation, centering, magnetostrictive, and dual-positioning ultrasonic vibration machining system according to claim 1, characterized in that: The machine tool spindle (3) is concentric with the magnetostrictive positioning device (4), the ultrasonic vibration device (5), and the magnetic levitation device (7).

6. The magnetic levitation, centering, magnetostrictive, and dual-positioning ultrasonic vibration machining system according to claim 5, characterized in that: The inner ring of the connecting bearing (405), the electromagnetic ring (701), the ultrasonic induction power supply (501) are concentric with the machine tool spindle (3) and move relatively independently. The permanent magnet ring (703) is fixed to the machine tool spindle (3) by magnetic attraction.

7. The magnetic levitation, centering, magnetostrictive, and dual-positioning ultrasonic vibration machining system according to claim 1, characterized in that: When the machine tool is running, the magnetostrictive positioning device (4) is held tightly to the machine tool spindle (3) and rotates synchronously without axial or circumferential offset. The inner ring of the connecting bearing (405) is kept still by the stabilizer (2). The connecting bearing (405) is fixedly connected to the electromagnetic ring (701) and the ultrasonic induction power supply (501) and remains stable and motionless when the machine tool is running. The permanent magnet ring (703) rotates synchronously with the machine tool spindle (3), and the ultrasonic vibrator (502) and the tool (6) rotate synchronously with the machine tool spindle (3). At the same time, the ultrasonic vibrator (502) is induced by the ultrasonic induction power supply (501) and performs ultrasonic vibration, which drives the tool (6) to vibrate synchronously.

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