CN111872828A - Magnetic suspension polishing device and operation method thereof - Google Patents
Magnetic suspension polishing device and operation method thereof Download PDFInfo
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- CN111872828A CN111872828A CN202010689199.9A CN202010689199A CN111872828A CN 111872828 A CN111872828 A CN 111872828A CN 202010689199 A CN202010689199 A CN 202010689199A CN 111872828 A CN111872828 A CN 111872828A
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- polishing
- permanent magnet
- polishing head
- generating device
- electromagnetic generating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention relates to a magnetic suspension polishing device and an operation method thereof, and the magnetic suspension polishing device mainly comprises an electromagnetic generating device, a polishing head, a polishing sheet, a first permanent magnet, a second permanent magnet, a third permanent magnet and a position sensor, wherein the electromagnetic generating device and the first permanent magnet realize high-speed rotation of the polishing head under the action of magnetic force, the second permanent magnet and the third permanent magnet are used for offsetting axial force borne by the polishing head, and the position sensor senses the floating size of the polishing head in the polishing process to realize constant-force polishing. The invention is based on the magnetic suspension principle, is applied to the field of polishing, utilizes the suspension effect to automatically adjust the force, increases the adaptability to complex surface types, can realize constant-speed high-rotation-speed polishing on different surface types, avoids the damage of vibration to the polishing device in the polishing process, prolongs the service life of the polishing device, and ensures the stability of the polishing process.
Description
Technical Field
The invention relates to the technical field of polishing devices, in particular to a magnetic suspension polishing device and an operation method thereof.
Background
With the progress and development of science and technology, the high precision polishing technology has been extensively and deeply studied. Magnetic levitation technology is widely applied to some rotating devices due to the characteristics of no physical contact and high rotating speed, and the magnetic levitation technology can be applied to the polishing field because the polishing technology needs the rotating devices to provide power for the rotating devices.
When polishing a complex surface type, the operation process is complex and the service life of the polishing tool is required to be longer. Based on the characteristics that magnetic suspension has good adaptability to the surface appearance of an object and a magnetic field has controllability, the invention provides the magnetic suspension polishing device and the operation method thereof, and constant-force polishing of workpieces can be realized. The polishing part is suspended by using the principle that like poles repel and opposite poles attract among magnetic fields, and moves in a suspension state to polish the workpiece. The service life of the polishing tool is prolonged to a certain extent, the operation process of polishing is simplified, workpieces with complex surfaces can be polished stably at high rotating speed, and the polishing effect is better achieved.
Disclosure of Invention
The invention aims to provide a magnetic suspension polishing device which is suitable for complex surface type and achieves the constant-force high-speed stable polishing effect and an operation method thereof. By utilizing the characteristic of magnetic suspension, the non-physical contact between the electromagnetic generating device and the polishing head is realized in the polishing process, the destructiveness of the polishing device caused by vibration in the polishing process is reduced, the service life of the polishing device is prolonged, and the stability of the polishing process is ensured.
A magnetic suspension polishing device and an operation method thereof comprise a substrate, an electromagnetic generating device, a first permanent magnet, a polishing head, a polishing sheet, a controller and a position sensor, wherein the electromagnetic generating device is fixed on the substrate and connected with the controller, the first permanent magnet is arranged on an inner ring of the polishing head, the number of the electromagnetic generating device and the number of the first permanent magnet are 3, the electromagnetic generating device and the first permanent magnet are uniformly distributed at intervals, the first permanent magnet is arranged in a homopolar orientation electromagnetic generating device, high-speed rotation movement of the polishing head is realized between the electromagnetic generating device and the first permanent magnet through magnetic force, the position sensor is positioned on the central end face of the substrate to detect the radial floating size of the polishing head in the polishing process, and the polishing sheet is fixed on.
The polishing head comprises a polishing head body, and is characterized by further comprising a second permanent magnet, a third permanent magnet and end covers, wherein the number of the second permanent magnet and the number of the third permanent magnet are 2, the end covers are arranged at the left end and the right end of the polishing head body and fixed on the base body, the second permanent magnet is arranged on the end covers at the left end and the right end of the polishing head body in a centering manner, the third permanent magnet is arranged at the left end and the right end of the polishing head body in a centering manner, the second permanent magnet and the third permanent magnet are both annular permanent magnets, and.
Furthermore, the cross-sectional area of the second permanent magnet is larger than that of the third permanent magnet, so that the third permanent magnet does not exceed the cross section of the second permanent magnet in the vertical direction along with the floating range of the polishing head in the polishing process.
The operation method comprises the following steps:
step 1: installing the polishing device on a numerical control machine tool;
step 2: starting the controller, electrifying the electromagnetic generating device to generate a magnetic field with the same magnetic polarity as the magnetic pole of the first permanent magnet facing to the electromagnetic generating device, so that the polishing head is suspended, generating repulsive force between the electromagnetic generating device and the first permanent magnet under the action of the magnetic field with the same polarity, so that the polishing head runs at a high speed, and driving the polishing sheet to polish the workpiece;
and step 3: one of the situations is: in the polishing process, the polishing head is stressed to float up and down, the current passing through the electromagnetic generating device is increased through the controller, the repulsive force of the electromagnetic generating device and the first permanent magnet is enhanced, the rotating speed is increased, the pressure on a polished workpiece is increased, and the polishing condition and the other condition are achieved: the vertical floating size of the polishing head is detected through a position sensor positioned on the central end face, the position of the polishing head is detected through a set position sensor, a position signal is converted into a current signal, the size of the current is adjusted through a controller, the size of repulsive force between an electromagnetic generating device and a first permanent magnet is adjusted, the polishing head automatically returns to the set position, and the polishing head drives a polishing sheet to perform constant-force polishing on a workpiece;
and 4, step 4: when the polishing effect is achieved, the direction of current passing through the electromagnetic generating device is changed through the controller, the electromagnetic generating device generates a magnetic field with the magnetic polarity different from that of the magnetic pole of the first permanent magnet facing one end of the electromagnetic generating device, an adsorption force is generated, and the polishing head stops running;
and 5: and after finishing polishing, closing the controller.
The invention has the beneficial effects that: according to the invention, by utilizing the principle that like poles repel and opposite poles attract between the electromagnetic generating device and the first permanent magnet, the polishing head can stably run at a high speed, and the polishing effect can be better achieved. By utilizing the magnetic suspension principle, the polishing head and the electromagnetic generating device are not in physical contact in the working process, and the constant-force polishing is realized by automatically adjusting the force through the position sensor. And the abrasion and damage of the polishing devices caused by physical contact generated between the polishing devices are further avoided, and the service life of the polishing devices is prolonged to a certain extent.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of a polishing process according to an embodiment of the present invention;
in the drawings: 1 is a substrate, 2 is an electromagnetic generating device, 3 is a first permanent magnet, 4 is a polishing head, 5 is a polishing sheet, 6 is an end cover, 7 is a second permanent magnet, 8 is a third permanent magnet, 9 is a controller, 10 is a position sensor, 11 is an unpolished workpiece, 12 is a workpiece in the polishing process, and 13 is a polished workpiece.
Detailed Description
The invention is described in more detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a magnetic suspension polishing device and an operation method thereof, includes a substrate 1, an electromagnetic generating device 2, a first permanent magnet 3, a polishing head 4, a polishing sheet 5, a controller 9, and a position sensor 10, wherein the electromagnetic generating device 2 is fixed on the substrate 1 and connected to the controller 9, the controller 9 is used to control the current magnitude and direction of the electromagnetic generating device 2, the first permanent magnet 3 is disposed on the inner ring of the polishing head 4, the number of the electromagnetic generating device 2 and the first permanent magnet 3 is 3 and uniformly distributed at intervals, the first permanent magnet 3 is disposed with the same pole facing the electromagnetic generating device 2, when current is applied to the electromagnetic generating device 2, a magnetic field having the same magnetic pole magnetism as that of the first permanent magnet 3 facing one end of the electromagnetic generating device 2 is generated, a repulsive force is generated between the electromagnetic generating device 2 and the first permanent magnet 3 to drive the polishing head 4 to rotate at a high, the polishing sheet 5 is fixed on the polishing head 4 and moves along with the polishing head 4 to polish the workpiece, in the polishing process, the controller 9 is used for controlling the size and the direction of current passing through the electromagnetic generating device 2, so as to control the size and the direction of a magnetic field generated by the electromagnetic generating device 2, the magnetic field generates repulsive force or attractive force with the first permanent magnet 3 and can control the size of the magnetic field, the polishing head 4 drives the polishing sheet 5 to polish the workpiece, the position sensor 10 is positioned on the central end face of the base body 1 to detect the radial floating size of the polishing head 4 in the polishing process, when constant-force polishing is carried out, the position sensor 10 detects the deviation degree of the polishing head 4, the position sensor 10 detects the position of the polishing head 4, the position signal is converted into a current signal, and the polishing head 4 returns to a set position by automatically adjusting the size of the current, the polishing head 4 drives the polishing sheet 5 to perform constant-force polishing on the workpiece. The polishing head comprises a polishing head body 4, and is characterized by further comprising a second permanent magnet 7, a third permanent magnet 8 and end covers 6, wherein the number of the second permanent magnet 7 and the number of the third permanent magnet 8 are 2, the end covers 6 are arranged at the left end and the right end of the polishing head body and fixed on the substrate 1, the second permanent magnet 7 is arranged on the end covers 6 at the left end and the right end of the polishing head body 4 in a centering manner, the third permanent magnet is arranged at the left end and the right end of the polishing head body 4 in a centering manner, the second permanent magnet 7 and the third permanent magnet 8 are both annular permanent magnets, the second permanent magnet 7 and the third permanent magnet 8 are arranged oppositely in the same pole, and are used for offsetting axial force possibly generated by the polishing head body 4 in the polishing process, the cross-sectional area of the second permanent magnet 7 is larger than that of the third permanent magnet 8, so that the floating range of the third permanent magnet 8 along with the polishing head body 4 in the polishing process of The cross section of the second permanent magnet 7 and the third permanent magnet 8 generates large radial force to influence the accuracy of constant-force polishing. After polishing, the direction of current passing through the electromagnetic generating devices 2 is changed through the controller 9, the three electromagnetic generating devices 2 generate magnetic fields with different magnetic polarities facing one ends of the three electromagnetic generating devices 2 from the three first permanent magnets 3, and adsorption force is generated between the three electromagnetic generating devices 2 and the three first permanent magnets 3, so that the polishing head stops running.
Example 1
As shown in fig. 1 and 3, a magnetic suspension polishing device and an operation method thereof are provided, wherein the polishing device designed by the present invention is installed on a numerical control machine tool, a controller 9 is started, an electromagnetic generating device 2 generates a magnetic field with the same magnetic polarity as that of a magnetic pole of a first permanent magnet 3 facing one end of the electromagnetic generating device 2, a repulsive force is generated between the electromagnetic generating device 2 and the first permanent magnet 3, a polishing head 4 is in a suspension state and operates at a high speed, a polishing sheet 5 is driven to polish a workpiece, 11 is an unpolished workpiece, 12 is a workpiece in a polishing process, 13 is a polished workpiece, B is an unpolished state, C is a polished state, D is a polished state, during the polishing process, a substrate 1 is always on the same horizontal plane, the polishing head 4 floats up and down, when the polishing head 4 is just in contact with the workpiece to polish, the polishing head 4 deviates from the axis, along with the polishing process, the polishing head 4 comes closer to the axial position. In the processes from B to C and from C to D, the controller 9 increases the current passing through the electromagnetic generating device 2, the repulsive force between the electromagnetic generating device 2 and the first permanent magnet is enhanced, the rotating speed is increased, the pressure on the polished workpiece is increased, and the polishing condition is achieved, in the polishing process, due to uncertainty of the workpiece shape, the workpiece can enable the polishing head 4 to generate an axial force, the axial force generated by the polishing head 4 is counteracted through the repulsive force between the second permanent magnet 7 and the third permanent magnet 8 which are arranged on the end cover 6 and the polishing head 4 in a centering manner, after polishing is completed, the direction of the current passing through the electromagnetic generating device 2 is changed through the controller 9, the three electromagnetic generating devices 2 generate magnetic fields with different magnetic poles towards one end of the electromagnetic generating device 2 from the three first permanent magnets 3, adsorption force is generated, the polishing head is stopped to run, and the polishing head 4 has good adaptability to the shape of the polished workpiece and has a buffering effect in the polishing process As a result, the damage to the polishing device caused by vibration of some polishing devices during polishing is avoided.
The operation method comprises the following steps:
step 1: installing the polishing device on a numerical control machine tool;
step 2: starting the controller 9, wherein the electromagnetic generating device 2 generates a magnetic field with the same magnetic polarity as that of the first permanent magnet 3 towards one end of the electromagnetic generating device 2, so that the polishing head 4 is suspended, and under the action of the magnetic field with the same polarity, a repulsive force is generated between the electromagnetic generating device 2 and the first permanent magnet 3, so that the polishing head 4 operates at a high speed, and the polishing sheet 5 is driven to polish a workpiece;
and step 3: in the polishing process, the polishing head 4 is stressed to float up and down, the current passing through the electromagnetic generating device 2 is increased, the repulsive force of the electromagnetic generating device 2 and the first permanent magnet 3 is enhanced, the rotating speed is increased, the pressure on the polished workpiece is increased, the polishing condition is achieved,
and 4, step 4: when the polishing effect is achieved, the direction of current passing through the electromagnetic generating device 2 is changed through the controller 9, the electromagnetic generating device 2 generates a magnetic field with the magnetic polarity different from that of the magnetic pole, facing one end of the electromagnetic generating device 2, of the first permanent magnet 3, an adsorption force is generated, and the polishing head 4 stops running;
and 5: and after finishing polishing, closing the controller.
Example 2
As shown in figure 1, the magnetic suspension polishing device and the operation method thereof are characterized in that the polishing device related to the invention is arranged on a numerical control machine tool, a controller 9 is started, an electromagnetic generating device 2 generates a magnetic field with the same magnetic polarity as that of a magnetic pole of a first permanent magnet 3 facing one end of the electromagnetic generating device 2, a repulsive force is generated between the electromagnetic generating device 2 and the first permanent magnet 3, and a polishing head 4 is in a suspension state and runs at a high speed to drive a polishing sheet 5 to polish a workpiece. When a workpiece is polished, the polishing head 4 can shift the axis position, the position sensor 10 on the central end face of the base body 1 can detect the shift degree of the polishing head 4, the position sensor 10 is set to detect the position of the polishing head 4, the position signal is converted into a current signal, the polishing head 4 returns to the set position by automatically adjusting the current, and the polishing head 4 drives the polishing sheet 5 to polish the workpiece with constant force. In the polishing process, due to uncertainty of the morphology of the workpiece, the workpiece may cause the polishing head 4 to generate an axial force, the axial force generated by the polishing head 4 is offset by centering a repulsive force between the second permanent magnet 7 and the third permanent magnet 8 which are arranged on the end cover 6 and the polishing head 4, and the cross section area of the second permanent magnet 7 is larger than that of the third permanent magnet 8, so that the third permanent magnet 8 does not exceed the cross section of the second permanent magnet 7 in the vertical direction along with the floating range of the polishing head 4 in the polishing process, and thus, the problem that when the third permanent magnet 8 exceeds the cross section of the second permanent magnet 7 due to up-down floating of the polishing head 4 in the constant-force polishing process, a large radial force is generated between the second permanent magnet 7 and the third permanent magnet 8 to influence the accuracy of constant-force polishing is. After polishing, the direction of current passing through the electromagnetic generating devices 2 is changed through the controller 9, the three electromagnetic generating devices 2 generate magnetic fields with different magnetic polarities towards the magnetic poles at one ends of the three electromagnetic generating devices 2 from the three first permanent magnets 3, an adsorption force is generated, the polishing heads stop running, the polishing heads 4 have good adaptability to the shapes of the polished workpieces and play a role in buffering in the polishing process, and the damage to the polishing devices caused by vibration of some polishing devices in the polishing process is avoided.
The operation method comprises the following steps:
step 1: installing the polishing device on a numerical control machine tool;
step 2: starting the controller 9, electrifying the electromagnetic generating device 2 to generate a magnetic field with the same magnetic polarity as that of the first permanent magnet 3 towards one end of the electromagnetic generating device 2, so that the polishing head 4 is suspended, generating a repulsive force between the electromagnetic generating device 2 and the first permanent magnet 3 under the action of the magnetic field with the same polarity, so that the polishing head 4 operates at a high speed, and driving the polishing sheet 5 to polish the workpiece;
and step 3: in the polishing process, the polishing head 4 is stressed to float up and down, the position sensor 10 positioned on the central end face is used for detecting the up-and-down floating size of the polishing head 4, the position of the polishing head is detected by the position sensor 10, a position signal is converted into a current signal, the magnitude of repulsive force between the electromagnetic generating device 2 and the first permanent magnet 3 is adjusted by adjusting the magnitude of the current, the polishing head 4 automatically returns to the set position, and the polishing head 4 drives the polishing sheet 5 to perform constant-force polishing on a workpiece;
and 4, step 4: when the polishing effect is achieved, the direction of current passing through the electromagnetic generating device 2 is changed through the controller 9, the electromagnetic generating device 2 generates a magnetic field with the magnetic polarity different from that of the magnetic pole, facing one end of the electromagnetic generating device 2, of the first permanent magnet 3, an adsorption force is generated, and the polishing head 4 stops running;
and 5: and after finishing polishing, closing the controller.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the technical principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (4)
1. A magnetic suspension polishing device and an operation method thereof are characterized in that: the polishing head comprises a base body, an electromagnetic generating device, a first permanent magnet, a polishing head, a polishing sheet, a controller and a position sensor, wherein the electromagnetic generating device is fixed on the base body and connected with the controller, the first permanent magnet is arranged on an inner ring of the polishing head, the first permanent magnet is arranged towards the electromagnetic generating device in the same pole direction, the electromagnetic generating device and the first permanent magnet realize high-speed rotary motion of the polishing head through magnetic force, the position sensor is located on the central end face of the base body, and the polishing sheet is fixed on the polishing head.
2. A magnetic levitation polishing apparatus as recited in claim 1, and a method of operating the same, wherein: the polishing head comprises a polishing head body, and is characterized by further comprising a second permanent magnet, a third permanent magnet and end covers, wherein the number of the second permanent magnet and the number of the third permanent magnet are 2, the end covers are arranged at the left end and the right end of the polishing head body and fixed on the base body, the second permanent magnet is arranged in a centering mode on the end covers at the left end and the right end of the polishing head body, the third permanent magnet is arranged in a centering mode at the left end and the right end of the polishing head body, the second permanent magnet and the third permanent magnet are both annular permanent.
3. A magnetic levitation polishing apparatus and method of operating the same as recited in claim 2, wherein: the third permanent magnet does not exceed the cross section of the second permanent magnet along with the floating range of the polishing head in the vertical direction all the time in the polishing process.
4. A magnetic levitation polishing apparatus as recited in claim 1, and a method of operating the same, wherein: the operation method comprises the following steps:
step 1: installing the polishing device on a numerical control machine tool;
step 2: starting the controller, electrifying the electromagnetic generating device to generate a magnetic field with the same magnetic polarity as the magnetic pole of the first permanent magnet facing to the electromagnetic generating device, so that the polishing head is suspended, generating repulsive force between the electromagnetic generating device and the first permanent magnet under the action of the magnetic field with the same polarity, so that the polishing head runs at a high speed, and driving the polishing sheet to polish the workpiece;
and step 3: one of the situations is: in the polishing process, the polishing head is stressed to float up and down, the current passing through the electromagnetic generating device is increased through the controller, the repulsive force of the electromagnetic generating device and the first permanent magnet is enhanced, the rotating speed is increased, the pressure on a polished workpiece is increased, and the polishing condition and the other condition are achieved: the vertical floating size of the polishing head is detected through a position sensor positioned on the central end face, the position of the polishing head is detected through a set position sensor, a position signal is converted into a current signal, the size of the current is adjusted through a controller, the size of repulsive force between an electromagnetic generating device and a first permanent magnet is adjusted, the polishing head automatically returns to the set position, and the polishing head drives a polishing sheet to perform constant-force polishing on a workpiece;
and 4, step 4: when the polishing effect is achieved, the direction of current passing through the electromagnetic generating device is changed through the controller, the electromagnetic generating device generates a magnetic field with the magnetic polarity different from that of the magnetic pole of the first permanent magnet facing one end of the electromagnetic generating device, an adsorption force is generated, and the polishing head stops running;
and 5: and after finishing polishing, closing the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010689199.9A CN111872828A (en) | 2020-07-15 | 2020-07-15 | Magnetic suspension polishing device and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010689199.9A CN111872828A (en) | 2020-07-15 | 2020-07-15 | Magnetic suspension polishing device and operation method thereof |
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| CN111872828A true CN111872828A (en) | 2020-11-03 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010034185A1 (en) * | 1999-01-28 | 2001-10-25 | Masato Katoh | Thin-film magnetic head manufacturing method and apparatus |
| CN101011813A (en) * | 2007-02-09 | 2007-08-08 | 谢君 | Method and apparatus for surface polishing |
| CN101247071A (en) * | 2007-02-14 | 2008-08-20 | 刘新广 | Novel DC motor |
| CN201253798Y (en) * | 2008-09-23 | 2009-06-10 | 重庆三磨海达磨床有限公司 | Constant power cylindrical grinding mechanism |
| CN103560610A (en) * | 2013-11-08 | 2014-02-05 | 贵州凯敏博机电科技有限公司 | Improved structure of motor |
| CN108637352A (en) * | 2018-07-18 | 2018-10-12 | 太原科技大学 | A kind of disc type shear of superconduction external rotor electric machine dragging |
-
2020
- 2020-07-15 CN CN202010689199.9A patent/CN111872828A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010034185A1 (en) * | 1999-01-28 | 2001-10-25 | Masato Katoh | Thin-film magnetic head manufacturing method and apparatus |
| CN101011813A (en) * | 2007-02-09 | 2007-08-08 | 谢君 | Method and apparatus for surface polishing |
| CN101247071A (en) * | 2007-02-14 | 2008-08-20 | 刘新广 | Novel DC motor |
| CN201253798Y (en) * | 2008-09-23 | 2009-06-10 | 重庆三磨海达磨床有限公司 | Constant power cylindrical grinding mechanism |
| CN103560610A (en) * | 2013-11-08 | 2014-02-05 | 贵州凯敏博机电科技有限公司 | Improved structure of motor |
| CN108637352A (en) * | 2018-07-18 | 2018-10-12 | 太原科技大学 | A kind of disc type shear of superconduction external rotor electric machine dragging |
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Application publication date: 20201103 |