CN114473648A - Magnetic grinding device based on dynamic magnetic field is supplementary - Google Patents
Magnetic grinding device based on dynamic magnetic field is supplementary Download PDFInfo
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- CN114473648A CN114473648A CN202210219999.3A CN202210219999A CN114473648A CN 114473648 A CN114473648 A CN 114473648A CN 202210219999 A CN202210219999 A CN 202210219999A CN 114473648 A CN114473648 A CN 114473648A
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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
- B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
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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
- B24B37/00—Lapping machines or devices; Accessories
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses a magnetic grinding device based on dynamic magnetic field assistance, which comprises a workpiece transmission mechanism, a magnetic field assistance mechanism and a magnetic grinding material, wherein the workpiece transmission mechanism is used for installing a pipe fitting to be polished and driving the pipe fitting to be polished to rotate; the magnetic field auxiliary mechanism comprises a static magnet, a dynamic magnet and a magnet moving assembly, the static magnet is arranged on one side of the pipe fitting to be polished, the dynamic magnet is arranged on the magnet moving assembly, the dynamic magnet is positioned on the other side of the pipe fitting to be polished, and the magnet moving assembly drives the dynamic magnet to be close to and away from the static magnet, so that the distribution of magnetic lines of force between the static magnet and the dynamic magnet is changed; the magnetic grinding material is filled in the position to be polished in the pipe fitting to be polished, is arranged along the magnetic lines of force and can turn over along with the change of the magnetic lines of force. The invention has novel and reasonable structure, and utilizes the dynamic change of the magnetic field to roll and update the abrasive particles arranged on the magnetic force line at the position to be polished, thereby increasing the utilization rate and improving the polishing efficiency.
Description
Technical Field
The invention relates to the technical field of part polishing, in particular to a magnetic grinding device based on dynamic magnetic field assistance.
Background
At present, the polishing technology for the inner surface of pipe fittings mainly comprises an electrochemical polishing technology, a magnetic grinding and polishing technology, an electrolysis-magnetic force composite grinding and polishing technology, a rotary magnetic pole auxiliary magnetic grinding and polishing technology, an ultrasonic wave auxiliary magnetic grinding and polishing technology and an alternating magnetic field auxiliary magnetic grinding and polishing technology.
However, in the existing pipe fitting part polishing technology:
when the electrochemical polishing technology is used for processing, the electrolyte is complex in configuration and high in cost, the application range of the technology is limited, the technology can only be used for polishing conductive materials, the polishing effect is difficult to guarantee, and the problems of environmental pollution and the like exist.
And (II) in the magnetic grinding and polishing technology, because the magnet is static relative to the movement of the workpiece, the magnetic field is static relatively, the arrangement position of the abrasive particles along the magnetic lines is fixed, the abrasive particles participating in cutting are not updated, the polishing efficiency is low, and the cost is high.
And (III) the electrolytic-magnetic grinding technology has high polishing efficiency, but the problems in electrochemical polishing and magnetic grinding polishing still exist.
The (IV) rotary magnetic pole auxiliary magnetic grinding and polishing technology improves polishing efficiency compared with magnetic grinding and polishing, but because the auxiliary magnetic pole part is difficult to fix, the structure is complex, the processing range is limited, and meanwhile, the auxiliary magnetic pole can form a magnetic loop with an external magnetic pole, the magnetic field intensity in a unit space is increased, and the magnetic abrasive grains obtain extra pressure under the adsorption action of the auxiliary magnetic pole. Due to the increase of grinding pressure, the acting force among the magnetic grinding particles is improved, the rigidity of the magnetic grinding particle group is enhanced, so that the rolling auxiliary action of the magnetic grinding particles cannot be normally exerted, the phenomenon of grinding track superposition is easy to occur, and the improvement of the surface quality of a workpiece is not facilitated.
And (V) when the ultrasonic magnetic grinding and polishing technology is used for processing, due to the addition of ultrasonic vibration, a workpiece is easy to have a defect wave during polishing.
In summary, there is a need to provide a new polishing technique to overcome the problems of the prior art that the utilization rate of the abrasive particles is low and the polishing efficiency is low due to the fixed positions of the abrasive particles.
Disclosure of Invention
The invention aims to provide a magnetic grinding device based on dynamic magnetic field assistance, which can roll and update abrasive particles arranged on a magnetic line of force through the dynamic change of a magnetic field, so that the utilization rate of the abrasive particles is increased, the polishing efficiency is improved, and the problems of low utilization rate of the abrasive particles and low polishing efficiency caused by fixed positions of the abrasive particles in the existing pipe fitting part polishing technology are solved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a magnetic grinding device based on dynamic magnetic field assistance, which comprises:
the workpiece transmission mechanism is used for installing a pipe fitting to be polished and driving the pipe fitting to be polished to rotate;
the magnetic field auxiliary mechanism comprises a static magnet, a dynamic magnet and a magnet moving assembly; the static magnet is arranged on one side of the pipe fitting to be polished through the static magnet clamp, the dynamic magnet is arranged on the magnet moving assembly, the dynamic magnet is positioned on the other side of the pipe fitting to be polished and driven to be close to and far away from the static magnet by the magnet moving assembly, so that the distribution of magnetic lines of force between the static magnet and the dynamic magnet is changed;
the magnetic abrasive is used for filling a position to be polished in the pipe fitting to be polished and comprises ferromagnetic particles and abrasive particles, and the abrasive particles are arranged at the position to be polished along the magnetic lines and can turn over along with the change of the magnetic lines.
Optionally, the static magnet includes a first permanent magnet, and the dynamic magnet is a dynamic permanent magnet; the N pole of the first permanent magnet is opposite to the S pole of the dynamic permanent magnet; or the S pole of the first permanent magnet is arranged opposite to the N pole of the dynamic permanent magnet.
Optionally, the static magnet includes a second permanent magnet and a third permanent magnet, and the dynamic magnet is a dynamic permanent magnet; the second permanent magnet, the third permanent magnet and the dynamic permanent magnet are distributed at the periphery of the pipe fitting to be polished at intervals, wherein one of the second permanent magnet and the third permanent magnet and the dynamic permanent magnet are both arranged with S poles facing the pipe fitting to be polished, and the other one of the second permanent magnet and the third permanent magnet is arranged with N poles facing the pipe fitting to be polished;
or the dynamic permanent magnet and one of the second permanent magnet and the third permanent magnet are arranged in a manner that the N pole faces the pipe fitting to be polished, and the other of the second permanent magnet and the third permanent magnet is arranged in a manner that the S pole faces the pipe fitting to be polished.
Optionally, when the dynamic permanent magnet is located at a position closest to the pipe to be polished, the second permanent magnet, the third permanent magnet and the dynamic permanent magnet are circumferentially and uniformly distributed on the periphery of the pipe to be polished.
Optionally, the workpiece transmission mechanism includes:
the device comprises a first base, a second base and a third base, wherein the first base is provided with a first motor and a spindle seat, and a spindle is rotatably arranged on the spindle seat;
the transmission assembly comprises a driving wheel, a driven wheel and a transmission belt, the driving wheel is connected with the first motor, the driven wheel is connected with one end of the main shaft, and the driving wheel is connected with the driven wheel through the transmission belt;
and the three-jaw chuck is arranged at the other end of the main shaft and is used for clamping one end of the pipe fitting to be polished.
Optionally, the workpiece transmission mechanism further includes a centering frame, and the centering frame includes:
the second base is vertically provided with an upright post;
the first cantilever beam is perpendicular to the pipe fitting to be polished, one end of the first cantilever beam is arranged on the upright post, and the position of the first cantilever beam along the height direction of the upright post is adjustable;
the second cantilever beam is perpendicular to the pipe fitting to be polished and is positioned below the first cantilever beam; one end of the second cantilever beam is arranged on the upright post, and the position of the second cantilever beam along the height direction of the upright post is adjustable;
the guide assembly comprises three groups of pulleys, one group of pulleys is rotatably mounted at the other end of the first cantilever beam, two groups of pulleys are rotatably mounted at the other end of the second cantilever beam along the length extension direction of the second cantilever beam, the rotation axis of any one pulley is parallel to the axis of the pipe fitting to be polished, and the pulley on the first cantilever beam is positioned between the two groups of pulleys on the second cantilever beam; the other end of the pipe fitting to be polished is used for being inserted between the first cantilever beam and the second cantilever beam and is in rolling contact with any one of the pulleys.
Optionally, the magnet moving assembly includes:
the linear rail is perpendicular to the pipe fitting to be polished;
the lead screw sliding block assembly comprises a lead screw and a linear rail displacement table in threaded connection with the lead screw, the lead screw is parallel to the linear rail and is rotatably installed on the linear rail, and the linear rail displacement table is in sliding fit with the linear rail; one end of the lead screw, which is far away from the pipe fitting to be polished, is connected with a second motor;
and the dynamic magnet clamp is arranged on the linear rail displacement table and used for installing the dynamic magnet.
Optionally, the magnetic abrasive is magnetic fluid, and the magnetic fluid is a mixture of grinding fluid, the ferromagnetic particles and the abrasive particles.
Optionally, plant cellulose is further added to the magnetic fluid.
Optionally, the control device further comprises a control mechanism, and the control mechanism is electrically connected with the first motor and the second motor.
Optionally, the magnetic rail fixing device further comprises a bottom plate, and the standing magnet clamp, the first base and the linear rail are mounted on the bottom plate.
The invention also provides another magnetic grinding device based on dynamic magnetic field assistance, which comprises:
the workpiece transmission mechanism is used for installing a pipe fitting to be polished and driving the pipe fitting to be polished to rotate;
the magnetic field auxiliary mechanism comprises three electromagnets, and the three electromagnets are distributed on the periphery of the pipe fitting to be polished; any electromagnet is provided with an independent current coil, and at least one current coil can be switched between a power-on state and a power-off state in a reciprocating mode, so that the distribution of magnetic lines of force among the three electromagnets is changed;
the magnetic abrasive is used for filling a position to be polished in the pipe fitting to be polished and comprises ferromagnetic particles and abrasive particles, and the abrasive particles are arranged at the position to be polished along the magnetic lines and can turn over along with the change of the magnetic lines.
Compared with the prior art, the invention has the following technical effects:
the magnetic grinding device based on the dynamic magnetic field assistance, which is provided by the invention, has a novel and reasonable structure, drives the dynamic magnet to intermittently keep away from the static magnet through the magnet moving component, so that the distribution of magnetic force lines between the static magnet and the dynamic magnet is changed, and the dynamic change of the magnetic field is utilized to lead the ferromagnetic particles arranged on the magnetic line (or called as the magnetic induction line) at the position to be polished to generate position change, thus leading the abrasive particles attached to the surface of the ferromagnetic particles to roll and update, thereby leading different abrasive particles to contact and cut the position to be polished in the pipe fitting to be polished at different angles, not only avoiding the passivation caused by the excessive use of the abrasive particles and increasing the utilization rate of the abrasive particles, but also improving the polishing efficiency, thereby effectively solved the fixed problem that leads to the grit low-usage of grit, polishing efficiency low of the grit position that current pipe fitting class part polishing technique exists.
The magnetic grinding device based on the dynamic magnetic field assistance is a brand new design, and compared with the magnetic grinding and polishing technology and the rotary magnetic pole assistance polishing technology, the magnetic grinding device improves the polishing efficiency and the surface quality; compared with the ultrasonic auxiliary magnetic grinding technology and the alternating magnetic field auxiliary grinding technology, the method has the advantages that the participation rate of abrasive particles in the polishing process is improved, and the processing cost is reduced.
In some technical schemes, the magnetic fluid is used as a magnetic abrasive, the magnetic fluid is a magnetic composite fluid formed by mixing grinding fluid, ferromagnetic particles and abrasive particles, the magnetic fluid can roll effectively under the action of a dynamic magnetic field to realize efficient polishing, and the magnetic grinding device is an environment-friendly material, is low in cost and consumption, has no toxicity and fire hazard because the only consumable material is the grinding fluid which contains 97% of water, and completely meets the environment-friendly emission standard.
In the other magnetic grinding device based on the dynamic magnetic field assistance, the electromagnets are adopted to replace the permanent magnets, at least one electromagnet is powered off according to a certain frequency, so that the magnetic field can be correspondingly changed according to the power-off frequency, and the effect of turning over the abrasive particles can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a top view of a dynamic magnetic field assisted magnetic grinding apparatus according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along the line A-A of the magnetic grinding apparatus based on the dynamic magnetic field assistance disclosed in FIG. 1;
FIG. 3 is a schematic structural diagram of a centering frame according to an embodiment of the present invention;
fig. 4 is a wiring schematic diagram of the first motor and the second motor and the control system disclosed in the embodiment of the invention.
Wherein the reference numerals are: 100. a magnetic grinding device based on dynamic magnetic field assistance;
1. a magnetic abrasive; 2. a pipe fitting to be polished; 31. a second permanent magnet; 32. a third permanent magnet; 4. a dynamic magnet; 5. standing the magnet clamp; 6. a dynamic magnet clamp; 7. a first base; 8. a first motor; 81. a motor bracket; 9. a main shaft seat; 10. a main shaft; 11. a driving wheel; 12. a driven wheel; 13. a transmission belt; 14. a three-jaw chuck; 15. a centering frame; 151. a second base; 152. a column; 153. a first cantilever beam; 154. a second cantilever beam; 155. a first pulley; 156. a second pulley; 157. a third pulley; 16. a wire track; 17. a lead screw; 18. a linear rail displacement stage; 19. a second motor; 20. a base plate; 21. a coupling is provided.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
One of the objectives of the present invention is to provide a magnetic grinding device based on dynamic magnetic field assistance, which can change the position of ferromagnetic particles arranged on a magnetic line of force through the dynamic change of a magnetic field, so that abrasive particles attached to the surface of the ferromagnetic particles roll and update, thereby increasing the utilization rate of the abrasive particles and improving the polishing efficiency, so as to solve the problems of low utilization rate of the abrasive particles and low polishing efficiency caused by the fixed position of the abrasive particles in the existing pipe fitting part polishing technology.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
As shown in fig. 1 to fig. 2, the present embodiment provides a magnetic grinding apparatus 100 based on dynamic magnetic field assistance, which mainly includes a workpiece transmission mechanism, a magnetic field assistance mechanism, and a magnetic abrasive, wherein the workpiece transmission mechanism is used for installing a pipe 2 to be polished and driving the pipe 2 to be polished to rotate; magnetic field complementary unit is including the magnet that stews, dynamic magnet 4 and magnet removal subassembly, the magnet that stews sets up in the one side of treating polishing pipe fitting 2 through the magnet anchor clamps 5 that stews, dynamic magnet 4 sets up on magnet removal subassembly, dynamic magnet 4 is located the opposite side of treating polishing pipe fitting 2, and it is close to and keeps away from the magnet that stews by magnet removal subassembly drive, so that the magnetic line of force distribution between magnet and the dynamic magnet 4 that stews changes, reciprocal drive dynamic magnet 4 many times keeps away from and is close to the magnet that stews, alright the magnetic line of force distribution between magnet and the dynamic magnet 4 that makes to stew changes of certain law. The magnetic abrasive 1 is used for filling a position to be polished in a pipe fitting 2 to be polished, and comprises ferromagnetic particles and abrasive particles, wherein the abrasive particles are attached to the surfaces of the ferromagnetic particles, are arranged at the position to be polished along magnetic lines, and can turn over along with the change of the magnetic lines.
In this embodiment, the stationary magnet includes only the first permanent magnet, and the dynamic magnet 4 is a dynamic permanent magnet; the N pole of the first permanent magnet is opposite to the S pole of the dynamic permanent magnet; or the S pole of the first permanent magnet is arranged opposite to the N pole of the dynamic permanent magnet. In this case, the first permanent magnet and the dynamic magnet 4 are preferably symmetrically distributed on both sides of the pipe 2 to be polished.
Besides, the static magnet may further include two permanent magnets, namely a second permanent magnet 31 and a third permanent magnet 32, and the dynamic magnet 4 is a dynamic permanent magnet; the second permanent magnet 31, the third permanent magnet 32 and the dynamic permanent magnet are distributed at the periphery of the pipe fitting 2 to be polished at intervals, wherein one of the second permanent magnet 31 and the third permanent magnet 32 and the dynamic permanent magnet are both arranged with the S pole facing the pipe fitting 2 to be polished, and the other one of the second permanent magnet 31 and the third permanent magnet 32 is arranged with the N pole facing the pipe fitting 2 to be polished; or both the dynamic permanent magnet and one of the second permanent magnet 31 and the third permanent magnet 32 are arranged with the N pole facing the pipe 2 to be polished, and the other of the second permanent magnet 31 and the third permanent magnet 32 is arranged with the S pole facing the pipe 2 to be polished. Preferably, when the dynamic permanent magnet is located at a position closest to the pipe 2 to be polished, the second permanent magnet 31, the third permanent magnet 32 and the dynamic permanent magnet are uniformly distributed on the periphery of the pipe 2 to be polished in a circumferential manner, and the second permanent magnet 31, the third permanent magnet 32 and the dynamic permanent magnet are arranged at an interval of 120 degrees in the circumferential direction, as shown in fig. 2 in particular.
In this embodiment, as shown in fig. 1, the workpiece transmission mechanism includes a first base 7, a transmission assembly and a three-jaw chuck 14, a first motor 8 and a spindle seat 9 are disposed on the first base 7, the first motor 8 is supported and fixed by a motor support 81, and a spindle 10 is rotatably mounted on the spindle seat 9 through a bearing; the transmission assembly comprises a driving wheel 11, a driven wheel 12 and a transmission belt 13, the driving wheel 11 is connected with the output end of the first motor 8, the driven wheel 12 is connected with one end of the main shaft 10, and the driving wheel 11 and the driven wheel 12 are connected through the transmission belt 13 to form a transmission belt mechanism; a three-jaw chuck 14 is mounted to the other end of the spindle 10 for holding one end of the tubular 2 to be polished. Wherein, the spindle seat 9 is arranged on the first base 7 through a bolt; the driving wheel 11 is connected with an output shaft of the first motor 8 through interference fit, and the driven wheel 12 is connected with the main shaft 10 through interference fit; the three-jaw chuck 14 is mounted on the spindle 10 by a threaded connection.
In this embodiment, as shown in fig. 1 and 3, the workpiece transmission mechanism further includes a centering frame 15, the centering frame 15 includes a second base 151, a first cantilever beam 153, a second cantilever beam 154 and a guiding assembly, a column 152 is vertically disposed on the second base 151, and the column 152 is perpendicular to the pipe 2 to be polished; the first cantilever beam 153 is perpendicular to the pipe 2 to be polished, the first cantilever beam 153 is perpendicular to the upright column 152, one end of the first cantilever beam 153 is mounted on the upright column 152, and the position of the first cantilever beam 153 in the height direction of the upright column 152 is adjustable; the second cantilever beam 154 is arranged perpendicular to the pipe 2 to be polished and below the first cantilever beam 153, and the second cantilever beam 154 is arranged parallel to the first cantilever beam 153; one end of the second cantilever beam 154 is mounted on the upright 152, and the position of the second cantilever beam 154 along the height direction of the upright 152 is adjustable. The guide assembly comprises three groups of pulleys, namely a pulley I155, a pulley II 156 and a pulley III 157, the other end (namely the cantilever end) of the first cantilever beam 153 is rotatably provided with one group of pulleys, namely the pulley I155, and the other end (namely the cantilever end) of the second cantilever beam 154 is rotatably provided with two groups of pulleys along the length extension direction of the second cantilever beam 154, namely the pulley II 156 and the pulley III 157; the rotation axis of any one of the pulleys is parallel to the axis of the pipe 2 to be polished, and the first pulley 155 on the first cantilever beam 153 is positioned between the second pulley 156 and the third pulley 157 on the second cantilever beam 154; the end of the tubular 2 to be polished, which is remote from the three-jaw chuck 14, is adapted to be inserted between the first cantilever beam 153 and the second cantilever beam 154 and to be in rolling contact with each of the first pulley 155, the second pulley 156 and the third pulley 157. Preferably, the first pulley 155 is positioned on the central vertical line of the second pulley 156 and the third pulley 157, i.e. the middle point of the central connecting line of the second pulley 156 and the third pulley 157 is in a straight line with the center of the first pulley 155, thereby ensuring that the pipe 2 to be polished is firmly clamped among the first pulley 155, the second pulley 156 and the third pulley 157. The number of the pulley sets of the guide assembly is not limited to the three groups; the first pulley 155, the second pulley 156 and the third pulley 157 can be replaced by bearing structures, which can support the pipe 2 to be polished and do not limit the rotation of the pipe 2 to be polished.
In this embodiment, the upright 152 may be mounted on the second base 151 by bolts. An adjusting through groove is formed in the upright 152 along the height extending direction thereof, as shown in fig. 3, the first cantilever beam 153 and the second cantilever beam 154 are preferably screwed and fixed in the adjusting through groove by bolts and nuts; the bolts and nuts are loosened to enable the first cantilever beam 153 and/or the second cantilever beam 154 to be adjusted up and down along the upright 152, and after the first cantilever beam 153 and/or the second cantilever beam 154 are adjusted to a proper position, the first cantilever beam 153 and/or the second cantilever beam 154 are fixed on the upright 152 by screwing the bolts and nuts.
In the embodiment, as shown in fig. 1 and fig. 2, the magnet moving assembly includes a linear rail 16, a lead screw slider assembly and a dynamic magnet clamp 6, wherein the linear rail 16 is arranged perpendicular to the pipe 2 to be polished; the lead screw sliding block assembly comprises a lead screw 17 and a linear rail displacement table 18 in threaded connection with the lead screw 17, the lead screw 17 is parallel to the linear rail 16 and is rotatably installed on the linear rail 16, and the linear rail displacement table 18 is in sliding fit with the linear rail 16; one end of the screw rod 17 far away from the pipe fitting 2 to be polished can be connected with a second motor 19 through a coupler 21; the dynamic magnet clamp 6 is arranged on the linear rail displacement table 18 and used for installing the dynamic magnet 4. The dynamic magnet clamp 6 is preferably connected to a linear rail displacement table 18 through a bolt, and the linear rail displacement table 18 can reciprocate along the lead screw 17 under the rotation of the lead screw 17; the dynamic permanent magnet 3 and the dynamic magnet clamp 6 reciprocate along with the linear rail displacement table 18.
In this embodiment, the magnetic abrasive 1 is preferably a magnetic fluid, and the magnetic fluid is a mixture of an abrasive liquid, ferromagnetic particles, plant cellulose, and abrasive particles.
In this embodiment, the electric vehicle further comprises a control mechanism, and the control mechanism is electrically connected with the first motor 8 and the second motor 19. As shown in fig. 4, the control mechanism mainly comprises a dc power supply, a first controller, a second controller, a first speed regulator and a second speed regulator. The input end of the direct-current power supply is connected with 220V household alternating current (grounded), the first output port is connected with the input end of the first controller, and the second output port is connected with the input end of the second controller; the output end of the first controller is connected with the first motor 8, and the control end is connected with the first speed regulator; similarly, the output end of the second controller is connected with the second motor 19, and the control end is connected with the second speed regulator. The control mechanism can be used for controlling the starting and stopping, the rotating speed and the rotating frequency of the first motor 8 and the second motor 19, so that the automatic operation of the magnetic grinding device is realized.
In this embodiment, as shown in fig. 1, the magnetic clamp further includes a bottom plate 20, and the bottom plate 20 is provided with the standing magnet clamp 5, the first base 7, the wire rail 16, and the second base 151. Preferably, the stationary magnet holder 5, the first base 7, the wire rail 16 and the second base 151 are fixed to the base plate 20 by screwing.
In this embodiment, the adopted static magnet clamp 5 and the adopted dynamic magnet clamp are preferably plate structures, and the first permanent magnet, the second permanent magnet 31 and the third permanent magnet 32 are respectively embedded in the static magnet clamp 5 and can be fixed on the static magnet clamp 5 through interference fit, bolt connection and other modes. Similarly, the dynamic magnet 4 is embedded in the dynamic magnet fixture and can be fixed on the dynamic magnet fixture in interference fit, bolt connection and other ways.
The operation principle of the magnetic grinding apparatus 100 based on the dynamic magnetic field assist according to the present embodiment will be specifically described below by taking three permanent magnets, i.e., the second permanent magnet 31, the third permanent magnet 32, and the dynamic magnet 4, as an example. Wherein, as shown in fig. 2, the second permanent magnet 31, the third permanent magnet 32 and the dynamic magnet 4 are uniformly distributed at the periphery of the pipe fitting 2 to be polished at intervals, one of the second permanent magnet 31 and the third permanent magnet 32 is disposed toward the pipe fitting 2 to be polished for the S pole, the other is disposed toward the pipe fitting 2 to be polished for the N pole, and the dynamic magnet 4 is disposed toward the pipe fitting 2 to be polished for the S pole.
One end of the pipe fitting 2 to be polished penetrates through the standing magnet clamp 5 and is fixed on the three-jaw chuck 14, the other end of the pipe fitting 2 to be polished penetrates between the first cantilever beam 153 and the second cantilever beam 154 of the centering frame 15, the first motor 8 is started, the main shaft 10, the three-jaw chuck 14 and the pipe fitting 2 to be polished are driven to synchronously rotate through the driving belt 13, and the dynamic magnet clamp 6 drives the dynamic magnet 4 to periodically reciprocate linearly along with the linear rail displacement table 18, namely the dynamic magnet 4 reciprocates for multiple times to be far away from or close to the second permanent magnet 31 and the third permanent magnet 32; a certain amount of magnetic fluid (namely, magnetic abrasive 1) is injected into the pipe fitting 2 to be polished, the magnetic fluid forms a flexible cluster structure under the action of a magnetic field, ferromagnetic particles are distributed along magnetic lines, abrasive particles are attached to the surface of the ferromagnetic particles, micro-cutting is carried out at the position, contacted with the pipe wall of the position, to be polished, of the pipe fitting 2 to be polished, along with the reciprocating motion of the dynamic magnet 4, the distribution of the magnetic field constantly changes according to a certain periodic rule, so that the position of the ferromagnetic particles at the contact position with the pipe wall in the pipe fitting 2 to be polished changes, the abrasive particles attached to the surface of the ferromagnetic particles constantly update and roll, and the efficient polishing effect is achieved. The technical scheme provides a brand-new design, the dynamic permanent magnet moves according to a certain frequency, the magnetic field is regularly changed, and the abrasive particles arranged on the magnetic force line can be continuously rolled and updated, so that the utilization rate of the abrasive particles is increased, and the polishing efficiency is improved.
In the embodiment, plant cellulose can be mixed into the magnetic fluid to enhance the viscosity of the magnetic fluid and improve the polishing quality of the magnetic fluid to the pipe fitting in the overturning process.
Therefore, the magnetic grinding device based on dynamic magnetic field assistance provided by the technical scheme has the advantages that the structure is novel and reasonable, the dynamic magnet is driven by the magnet moving assembly to be intermittently far away from the static magnet, the distribution of magnetic lines of force between the static magnet and the dynamic magnet is changed, the dynamic change of a magnetic field is utilized, and the grinding particles arranged on the magnetic lines of force (or called as magnetic induction lines) at the position to be ground are rolled and updated, so that different grinding particles are contacted and cut at the position to be ground in a pipe to be polished at different angles, passivation caused by transitional use of the grinding particles is avoided, the utilization rate of the grinding particles is increased, the polishing efficiency is also improved, and the problems of low utilization rate of the grinding particles and low polishing efficiency caused by fixed positions of the grinding particles in the existing pipe part polishing technology are effectively solved.
The magnetic grinding device based on the dynamic magnetic field assistance is a brand new design, and compared with the magnetic grinding and polishing technology and the rotary magnetic pole assistance polishing technology, the magnetic grinding device improves the polishing efficiency and the surface quality; compared with the ultrasonic auxiliary magnetic grinding technology and the alternating magnetic field auxiliary grinding technology, the method has the advantages that the participation rate of abrasive particles in the polishing process is improved, and the processing cost is reduced.
According to the magnetic grinding device based on the dynamic magnetic field assistance, the magnetic fluid is used as the magnetic grinding material, the magnetic fluid is a magnetic composite fluid formed by mixing grinding fluid, ferromagnetic particles, plant cellulose and abrasive particles, the magnetic fluid can roll effectively under the action of the dynamic magnetic field, efficient polishing is achieved, the magnetic grinding device is an environment-friendly material, the cost is low, the consumption is low, the only consumable material is the grinding fluid, the grinding fluid contains 97% of moisture, and therefore the magnetic grinding device is free of toxicity and fire hazard and completely meets the environment-friendly emission standard.
Example two
The present embodiment also provides another magnetic grinding device 100 based on dynamic magnetic field assistance, which is different from the first embodiment only in that electromagnets are used to replace the permanent magnets in the first embodiment, and meanwhile, no magnet moving assembly is provided, and any electromagnet is simultaneously arranged on the outer periphery of the pipe 2 to be polished through a fixed support. Otherwise, the rest is the same as the first embodiment, and is not described herein again.
The present embodiment will be specifically described below by taking three sets of electromagnets as an example.
The three electromagnets are uniformly distributed on the periphery of the pipe fitting 2 to be polished at intervals; any electromagnet is provided with an independent current coil, one current coil can be switched between a power-on state and a power-off state repeatedly, so that the distribution of magnetic lines of force among the three electromagnets is changed, and the effect of turning over abrasive particles along with the change of the magnetic lines of force is achieved.
In the embodiment, three electromagnets are uniformly distributed around the pipe fitting 2 to be polished at 120 degrees, and the current coil of one electromagnet is powered on and powered off in a reciprocating mode according to a certain frequency, so that the magnetic field can be changed correspondingly according to the powered-on and powered-off frequencies, and the effect of rolling and updating abrasive particles at any time is achieved. Compared with the magnetic grinding and polishing technology and the rotary magnetic pole auxiliary polishing technology, the technology improves the polishing efficiency and the surface quality; compared with the ultrasonic auxiliary magnetic grinding technology and the alternating magnetic field auxiliary grinding technology, the method has the advantages that the participation rate of abrasive particles in the polishing process is improved, and the processing cost is reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A magnetic grinding device based on dynamic magnetic field assistance is characterized by comprising:
the workpiece transmission mechanism is used for installing a pipe fitting to be polished and driving the pipe fitting to be polished to rotate;
the magnetic field auxiliary mechanism comprises a static magnet, a dynamic magnet and a magnet moving assembly; the static magnet is arranged on one side of the pipe fitting to be polished through the static magnet clamp, the dynamic magnet is arranged on the magnet moving assembly, the dynamic magnet is positioned on the other side of the pipe fitting to be polished and driven to be close to and far away from the static magnet by the magnet moving assembly, so that the distribution of magnetic lines of force between the static magnet and the dynamic magnet is changed;
the magnetic grinding material is used for filling a to-be-polished position in the to-be-polished pipe fitting and comprises ferromagnetic particles and abrasive particles, and the abrasive particles are arranged at the to-be-polished position along the magnetic lines of force and can be turned over along with the change of the magnetic lines of force.
2. The magnetic grinding device based on the dynamic magnetic field assistance is characterized in that the static magnet comprises a first permanent magnet, and the dynamic magnet is a dynamic permanent magnet; the N pole of the first permanent magnet is opposite to the S pole of the dynamic permanent magnet; or the S pole of the first permanent magnet is arranged opposite to the N pole of the dynamic permanent magnet.
3. The magnetic grinding device based on the dynamic magnetic field assistance is characterized in that the static magnet comprises a second permanent magnet and a third permanent magnet, and the dynamic magnet is a dynamic permanent magnet; the second permanent magnet, the third permanent magnet and the dynamic permanent magnet are distributed at the periphery of the pipe fitting to be polished at intervals, wherein one of the second permanent magnet and the third permanent magnet and the dynamic permanent magnet are both arranged with S poles facing the pipe fitting to be polished, and the other one of the second permanent magnet and the third permanent magnet is arranged with N poles facing the pipe fitting to be polished;
or the dynamic permanent magnet and one of the second permanent magnet and the third permanent magnet are arranged in a manner that the N pole faces the pipe fitting to be polished, and the other of the second permanent magnet and the third permanent magnet is arranged in a manner that the S pole faces the pipe fitting to be polished.
4. The magnetic grinding device based on the dynamic magnetic field assistance is characterized in that when the dynamic permanent magnet is located closest to the pipe to be polished, the second permanent magnet, the third permanent magnet and the dynamic permanent magnet are uniformly distributed on the periphery of the pipe to be polished in a circumferential mode.
5. The magnetic grinding device based on dynamic magnetic field assistance of any one of claims 1 to 4 is characterized in that the workpiece transmission mechanism comprises:
the device comprises a first base, a second base and a third base, wherein the first base is provided with a first motor and a spindle seat, and a spindle is rotatably arranged on the spindle seat;
the transmission assembly comprises a driving wheel, a driven wheel and a transmission belt, the driving wheel is connected with the first motor, the driven wheel is connected with one end of the main shaft, and the driving wheel is connected with the driven wheel through the transmission belt;
and the three-jaw chuck is arranged at the other end of the main shaft and is used for clamping one end of the pipe fitting to be polished.
6. The dynamic magnetic field assisted magnetic grinding apparatus of claim 5, wherein the workpiece drive mechanism further comprises a centering frame, the centering frame comprising:
the second base is vertically provided with an upright post;
the first cantilever beam is perpendicular to the pipe fitting to be polished, one end of the first cantilever beam is arranged on the upright post, and the position of the first cantilever beam along the height direction of the upright post is adjustable;
the second cantilever beam is perpendicular to the pipe fitting to be polished and is positioned below the first cantilever beam; one end of the second cantilever beam is arranged on the upright post, and the position of the second cantilever beam along the height direction of the upright post is adjustable;
the guide assembly comprises three groups of pulleys, one group of pulleys is rotatably mounted at the other end of the first cantilever beam, two groups of pulleys are rotatably mounted at the other end of the second cantilever beam along the length extension direction of the second cantilever beam, the rotation axis of any one pulley is parallel to the axis of the pipe fitting to be polished, and the pulley on the first cantilever beam is positioned between the two groups of pulleys on the second cantilever beam; the other end of the pipe fitting to be polished is used for being inserted between the first cantilever beam and the second cantilever beam and is in rolling contact with any one of the pulleys.
7. The dynamic magnetic field assisted magnetic grinding apparatus of claim 5, wherein the magnet moving assembly comprises:
the linear rail is perpendicular to the pipe fitting to be polished;
the lead screw sliding block assembly comprises a lead screw and a linear rail displacement table in threaded connection with the lead screw, the lead screw is parallel to the linear rail and is rotatably installed on the linear rail, and the linear rail displacement table is in sliding fit with the linear rail; one end of the lead screw, which is far away from the pipe fitting to be polished, is connected with a second motor;
and the dynamic magnet clamp is arranged on the linear rail displacement table and used for installing the dynamic magnet.
8. The magnetic grinding device based on dynamic magnetic field assistance according to any one of claims 1 to 4, wherein the magnetic grinding material is a magnetic fluid, and the magnetic fluid is a mixture of grinding fluid, the ferromagnetic particles and the abrasive particles.
9. The dynamic magnetic field assistance-based magnetic grinding device of claim 7, further comprising a control mechanism electrically connected to the first motor and the second motor.
10. A magnetic grinding device based on dynamic magnetic field assistance is characterized by comprising:
the workpiece transmission mechanism is used for installing a pipe fitting to be polished and driving the pipe fitting to be polished to rotate;
the magnetic field auxiliary mechanism comprises three electromagnets, and the three electromagnets are distributed on the periphery of the pipe fitting to be polished; any electromagnet is provided with an independent current coil, and at least one current coil can be switched between a power-on state and a power-off state in a reciprocating mode, so that the distribution of magnetic lines of force among the three electromagnets is changed;
the magnetic abrasive is used for filling a position to be polished in the pipe fitting to be polished and comprises ferromagnetic particles and abrasive particles, and the abrasive particles are arranged at the position to be polished along the magnetic lines and can turn over along with the change of the magnetic lines.
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| CN202210219999.3A CN114473648B (en) | 2022-03-08 | 2022-03-08 | Magnetic grinding device based on dynamic magnetic field assistance |
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| CN114473648B (en) | 2023-07-25 |
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