CN113770818A - Two-dimensional ultrasonic vibration magnetorheological fluid precision finishing device and method - Google Patents
Two-dimensional ultrasonic vibration magnetorheological fluid precision finishing device and method Download PDFInfo
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- CN113770818A CN113770818A CN202111073823.3A CN202111073823A CN113770818A CN 113770818 A CN113770818 A CN 113770818A CN 202111073823 A CN202111073823 A CN 202111073823A CN 113770818 A CN113770818 A CN 113770818A
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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
- B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
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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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
- B24B31/112—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using magnetically consolidated grinding powder, moved relatively to the workpiece under the influence of pressure
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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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
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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
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention belongs to the technical field of finishing processing in mechanical engineering, and particularly relates to a two-dimensional ultrasonic vibration magnetorheological fluid point-by-point controllable precise finishing processing device. The invention comprises a feeding system, a vibration system, a variable magnetic field system and a workpiece; the feeding system is communicated with a narrow inner cavity of a workpiece through an inlet hose and an outlet hose to form a loop, the workpiece is connected with the vibration system and is positioned in the variable magnetic field system, the vibration system drives the workpiece to vibrate, the surface of the narrow inner cavity is subjected to the pressure of the magnetic grinding materials under the action of the magnetic field of the variable magnetic field system, and the surface of the narrow inner cavity is subjected to finishing processing under the action of the pressure and slippage of the magnetic grinding materials; the variable magnetic field system can adjust the intensity of the magnetic field and control the removal amount of the surface of the narrow inner cavity; the moving mechanism on the variable magnetic field system changes the relative position of the variable magnetic field system and the narrow inner cavity, and realizes the point-by-point finishing processing of the surface of the narrow inner cavity without dead points. The invention solves the problem of finishing the surface of the narrow inner cavity of the workpiece.
Description
Technical Field
The invention belongs to the technical field of finishing processing in mechanical engineering, and particularly relates to a two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device and method.
Background
With the rapid development of high and new industries such as aerospace, photoelectric communication and the like, various components which are complex in shape and made of materials difficult to machine have higher requirements on surface roughness; especially 3D prints the work piece of complicated configuration, need to carry on the finishing of surface when using in high-accuracy high reliability scene, reduce surface roughness or remove the residual printing melt of surface. The traditional finishing process such as abrasive flow finishing, magnetorheological finishing, barreling finishing and the like can be used for finishing a certain surface with a complex configuration; however, when the surfaces of some narrow inner cavities are finished, the conventional finishing technology cannot achieve the finishing effect required by the workpiece, or even achieve the purpose of removing surface residues or finishing in the narrow inner cavities. Although the traditional abrasive flow finishing processing technology and magnetorheological fluid can realize the finishing processing with adaptive shape on the inner surface of a cavity with a certain configuration, the fluid abrasive and the magnetorheological fluid directly flow along the direction with the minimum resistance under the extrusion action, can not cover most of the inner cavity surface, and especially can not process a non-flowing area in a workpiece at all; especially, in the case of a chamber having the inlet and the outlet on the same side, it is difficult to perform effective finishing of the surface of the narrow lumen. And when the workpiece is processed by utilizing the traditional abrasive flow and the magnetorheological fluid, the material removal amount of different areas on the surface cannot be controlled, and the differentiated requirement of surface finishing processing cannot be met. Therefore, a new finishing technology is needed to finish the surface of the narrow inner cavity, and the finishing problem that the removal amount of materials in different areas of the surface of the narrow inner cavity is controllable can be solved.
Patent CN 112405127A discloses an ultrasonic-assisted low-frequency alternating current electromagnetic particle grinding device, and the device transmits vibration to an electromagnet through a connecting rod device after amplifying the vibration through an amplitude transformer, so that the magnetic grinding material on the electromagnet generates axial high-frequency vibration, the reciprocating feeding effect of the electromagnetic device is realized by shaking a hand wheel, the magnetic grinding material is pressed on the inner surface of a pipe fitting to perform friction, scratching and extrusion effects on the surface, and the removal of surface defects of a workpiece is realized. The device is uneven in the processing surface through manual shaking feeding amount, only single texture along the flowing direction can be formed, the roughness of the inner surface of the workpiece in all directions is different, and fixed-point finishing processing cannot be realized.
Patent CN 109732467A discloses a circular tube inner wall precision finish machining device of compound static pressure abrasive flow of oval vibration, and the device mainly exerts ultrasonic vibration in the axial of circular tube and vertically simultaneously, interweaves by the oval mar of a large amount of grit each other, can show the homogeneity uniformity that improves the roughness of circular tube sample internal surface each direction, improves the machining effect of abrasive flow. However, the device is difficult to directly process a narrow inner cavity and realize point-by-point controllable high-precision surface finishing.
Patent CN107520684A discloses a magnetic disk is rotated by motor drive to generate a magnetic field, a sliding plate drives the rotating magnetic disk to slide horizontally, the center of the magnetic field is in a moving state, magnetic dead angle is avoided, magnetic abrasive can rub a workpiece in an all-round manner, meanwhile, the magnetic abrasive and the workpiece move longitudinally by shaking of a filter plate, the lower surface of the workpiece can be separated from the filter plate, and the magnetic abrasive can collide with the lower surface of the workpiece. However, this device is not suitable for finishing narrow lumens.
In summary, the existing finishing method has the problems that the finishing requirement of the surface of the narrow inner cavity of the workpiece with the narrow inner cavity cannot be realized, and the finishing processing of the removal amount of the controllable material in different areas of the surface of the narrow inner cavity cannot be solved.
Disclosure of Invention
The invention provides a two-dimensional ultrasonic vibration magnetorheological fluid precision finishing device and method, aiming at solving the problems that the prior art can not finish the surface of a narrow inner cavity of a workpiece with the narrow inner cavity and can not finish different areas of the surface of the narrow inner cavity by controllable material removal amount.
The invention is realized by adopting the following technical scheme: a two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device comprises a feeding system for providing magnetic grinding materials, a vibration system for transverse and longitudinal compound vibration, a variable magnetic field system and a workpiece with a narrow inner cavity;
the feeding system is communicated with a narrow inner cavity of a workpiece through an inlet hose and an outlet hose to form a loop, the workpiece is connected with the vibration system and is positioned in the variable magnetic field system, the vibration system drives the workpiece to vibrate, so that relative sliding is formed between the magnetic abrasive and the surface of the narrow inner cavity, and under the action of a magnetic field of the variable magnetic field system, the surface of the narrow inner cavity is subjected to the pressure of the magnetic abrasive, and the surface of the narrow inner cavity is subjected to finishing processing under the action of the pressure and the sliding of the magnetic abrasive; the variable magnetic field system can adjust the intensity of the magnetic field and control the removal amount of the surface of the narrow inner cavity;
the variable magnetic field system is connected with a moving mechanism, and the moving mechanism changes the relative position of the variable magnetic field system and the narrow inner cavity to realize point-by-point finishing processing of the surface of the narrow inner cavity without dead points.
Furthermore, the feeding system comprises a rack, a material pushing cylinder, a material barrel and a hydraulic cylinder;
the material pushing cylinder is placed on the rack, one end of the material pushing cylinder is connected with the hydraulic cylinder, a material pushing piston is arranged in the material pushing cylinder and connected with a piston rod of the hydraulic cylinder, the other end of the material pushing cylinder is communicated with the narrow inner cavity through a first hose, the material pushing cylinder is communicated with a material barrel positioned at the top of the material pushing cylinder, and the narrow inner cavity is communicated with the material barrel of the material pushing cylinder through a second hose.
Further, an inlet and an outlet are arranged on the narrow inner cavity, the inlet is connected with the first hose, a hard straight pipe is arranged on the inner side of the inlet, and the hard straight pipe is communicated with the innermost side of the narrow inner cavity; the outlet is connected with a second hose.
Further, the vibration system comprises a box body and a vibration platform arranged in the box body;
the box is internally and transversely provided with an ultrasonic vibration rod respectively, the two ultrasonic vibration rods are connected with the vibration platform, the top of the vibration platform is provided with a clamp, and the clamp is connected with a workpiece.
Furthermore, the other side of the vibration platform, which is opposite to the two ultrasonic vibration rods, is connected with a sliding chute, a sliding block is connected in the sliding chute in a sliding manner, a spring pressing sheet is connected on the sliding block, and the spring pressing sheet is hinged with one end of the sliding block through a pin and freely contacts with the other end of the sliding block;
and a bolt is arranged on the box body and close to the spring pressing sheet, and one end of the bolt, which is positioned on the box body, is tightly attached to the spring pressing sheet.
Furthermore, a nut is connected to the position, close to the outer wall of the box body, of the bolt.
Furthermore, the variable magnetic field system comprises a frame body with an opening at one side, magnetic poles are arranged at the top and the bottom of the opening of the frame body, and the workpiece is positioned between the two magnetic poles; an electromagnetic coil is arranged on one side of the frame body far away from the opening.
Furthermore, the moving mechanism comprises a numerical control machine tool and a tool handle, the tool handle is connected to the top of the frame body, and the tool handle drives the variable magnetic field system to move under the control of the numerical control machine tool.
Furthermore, the magnetic abrasive of the feeding system is magnetorheological polishing liquid.
A two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing method comprises the following steps:
s1; securing the workpiece to the fixture with the workpiece in the variable magnetic field system 22;
s2; connecting a first hose and a second hose to an inlet and an outlet of a narrow inner cavity of the workpiece respectively to form a loop with a feeding system for providing magnetic grinding materials;
s3; starting a feeding system, and introducing magnetorheological polishing solution into the narrow inner cavity to fill the narrow inner cavity with the magnetorheological polishing solution;
s4; starting a vibration system to enable magnetorheological polishing solution in the workpiece to start to vibrate under the action of a vibration platform;
s5; electrifying the variable magnetic field system, and polishing the narrow inner surface under the pressure and the sliding action of the magnetic grinding materials on the surface of the narrow inner cavity; the intensity of the variable magnetic field can be adjusted by controlling the magnitude of the introduced current so as to control the removal amount of the surface of the narrow inner cavity;
the variable magnetic field system moves under the driving of the moving mechanism, so that the relative position of the variable magnetic field system and the narrow inner cavity is changed, and the point-by-point finishing processing of the surface of the narrow inner cavity without dead points is realized.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the method, the workpiece is subjected to elliptical ultrasonic vibration through the two-dimensional ultrasonic vibration device, relative sliding is formed between the magnetorheological polishing liquid and the surface of the narrow inner cavity of the workpiece, the magnetorheological polishing liquid is contacted with the surface of the narrow inner cavity of the workpiece under certain pressure under the action of a magnetic field, and the surface of the narrow inner cavity is subjected to finishing processing under the pressure and the sliding action of the magnetorheological polishing liquid, so that the problem of finishing processing of the surface of the narrow inner cavity of the workpiece is solved;
2. the vibration device is ultrasonic vibration, the acceleration of the ultrasonic vibration is high, relative sliding is generated between magnetic abrasive particles (magnetorheological polishing liquid) and the surface of an inner cavity of a workpiece, the motion track of the abrasive particles under the ultrasonic vibration is a micron-order small ellipse, compared with pressure flow formed by extruding fluid, a fluid abrasive non-flowing area does not exist in the areas such as corners, and the surface of a narrow inner cavity can be completely polished;
3. the method and the device have the advantages that the relative position change of the magnetic pole and the workpiece is realized through the moving mechanism, the point-by-point finishing without dead points on the surface of the narrow inner cavity of the workpiece can be realized, the removal amount of finishing materials at the determined position or region is controlled, and the processing is more uniform and comprehensive;
4. the strength of the magnetic field is adjusted by controlling the current of the electromagnetic coil, so that the contact pressure of the magnetorheological polishing liquid and the surface of the workpiece is controlled, the removal amount of the surface material of the workpiece in different areas in unit time is controlled, and the point-by-point controllable high-precision surface finishing processing of the magnetic abrasive particles is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a schematic diagram of the present invention;
in the figure: 1-a machine frame, 2-a hydraulic cylinder, 3-a material pushing cylinder, 4-a material pushing piston, 5-a material barrel, 6-a second hose, 7-a narrow inner cavity, 8-a magnetic pole, 9-a knife handle, 10-an electromagnetic coil, 11-a box body, 12-a bolt, 13-an ultrasonic vibrating rod, 14-a first hose, 15-a nut, 16-a vibrating platform, 17-a sliding block, 18-a spring pressing sheet, 19-a pin, 20-a feeding system, 21-a hard straight pipe, 22-a variable magnetic field system, 23-a workpiece, 24-a moving mechanism, 25-an inlet, 26-an outlet, 27-a clamp, 28-a vibrating system and 29-a frame body.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1 to 4, the present invention provides a technical solution: a two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device comprises a feeding system 20 for providing magnetic grinding materials, a vibration system 28 for transverse and longitudinal compound vibration, a variable magnetic field system 22 and a workpiece 23 with a narrow inner cavity 7;
the feeding system is communicated with the narrow inner cavity 7 of the workpiece 23 through the inlet and outlet two hoses to form a loop, the workpiece 23 is connected with the vibration system 28 and is positioned inside the variable magnetic field system 22, the vibration system 28 drives the workpiece 23 to vibrate, so that relative sliding is formed between the magnetic abrasive and the surface of the narrow inner cavity 7, and under the action of the magnetic field of the variable magnetic field system 22, the surface of the narrow inner cavity 7 is subjected to the pressure of the magnetic abrasive, and the surface of the narrow inner cavity 7 is polished under the action of the pressure and the sliding of the magnetic abrasive; the variable magnetic field system 22 can adjust the intensity of the magnetic field and control the removal amount of the surface of the narrow inner cavity 7;
the variable magnetic field system is connected with a moving mechanism 24, and the moving mechanism 24 changes the relative position of the variable magnetic field system and the narrow inner cavity 7 to realize the point-by-point finishing processing of the surface of the narrow inner cavity 7 without dead points.
The feeding system 20 comprises a frame 1, a material pushing cylinder 3, a material barrel 5 and a hydraulic cylinder 2;
the material pushing cylinder 3 is placed on the rack 1, one end of the material pushing cylinder 3 is connected with the hydraulic cylinder 2, a material pushing piston 4 is arranged in the material pushing cylinder 3, the material pushing piston 4 is connected with a piston rod of the hydraulic cylinder 2, the other end of the material pushing cylinder 3 is communicated with the narrow inner cavity 7 through a first hose 14, the material pushing cylinder 3 is communicated with a material barrel 5 located at the top of the material pushing cylinder 3, and the narrow inner cavity 7 is communicated with the material barrel of the material pushing cylinder 3 through a second hose 6.
An inlet 25 and an outlet 26 are arranged on the narrow inner cavity 7, the inlet 25 is connected with the first hose 14, a hard straight pipe 21 is arranged on the inner side of the inlet 25, and the hard straight pipe 21 is introduced into the innermost side of the narrow inner cavity 7, so that the magnetic abrasive can be filled into the whole inner cavity; the outlet 26 is connected to the second hose 6.
The vibration system 28 comprises a box body 11 and a vibration platform 16 arranged inside the box body 11;
the ultrasonic vibration device is characterized in that an ultrasonic vibration rod 13 is transversely and longitudinally arranged in the box body 11 respectively, the two ultrasonic vibration rods 13 are connected with a vibration platform 16, a clamp 27 is arranged at the top of the vibration platform 16, the clamp 27 is connected with a workpiece 23, and the two ultrasonic vibration rods 13 form two-dimensional ultrasonic vibration to enable the workpiece to carry out elliptical ultrasonic vibration.
The other side of the vibration platform 16, which is opposite to the two ultrasonic vibration rods 13, is connected with a sliding chute, a sliding block 17 is connected in the sliding chute in a sliding mode, a spring pressing sheet 18 is connected onto the sliding block 17, and the spring pressing sheet 18 is hinged to one end of the sliding block 17 through a pin 19 and freely contacts with the other end of the sliding block 17;
a bolt 12 is arranged on the box body 11 and close to the spring pressing piece 18, and one end of the bolt 12, which is positioned on the box body 11, is tightly attached to the spring pressing piece 18; in the vibration process, the pressure of the spring pressing sheet 18 is adjusted through the bolt 12, so that the vibration platform 16 can be ensured to vibrate within a certain range while the sliding block 17 slides.
The bolt 12 is connected with a nut 15 close to the outer wall of the box body 11, so that the bolt 12 is prevented from loosening due to the vibration of the vibration platform 16.
The variable magnetic field system 22 comprises a frame body 29 with an opening at one side, magnetic poles 8 are arranged at the top and the bottom of the opening of the frame body 29, and the workpiece 23 is positioned between the two magnetic poles 8; the side of the frame 29 remote from the opening is provided with an electromagnetic coil 10.
The moving mechanism 24 comprises a numerical control machine tool and a tool handle 9, the tool handle 9 is connected to the top of the frame body 29, and the tool handle 9 drives the variable magnetic field system 22 to move on the X-Y axis plane under the control of the numerical control machine tool.
The magnetic abrasive of the feeding system 20 is magnetorheological polishing fluid.
The application provides a relative slip between magnetic abrasive particles and a workpiece is realized by utilizing two-dimensional ultrasonic vibration, and the device for controlling the action position of the magnetic field intensity and the magnetic field is used for realizing uniform finishing processing on the surface of a narrow inner cavity of the workpiece and finishing technology for controlling the removal amount of materials point by point.
A flexible small grinding head with visco-plastic behavior formed by magnetorheological fluid in a magnetic field is contacted with and presses the surface of a narrow inner cavity of a workpiece, the workpiece and the magnetorheological polishing fluid are enabled to have rapid relative motion through ultrasonic vibration, the surface of the workpiece slides relative to magnetic abrasive particles under large shearing force, so that the surface material of the workpiece is removed through polishing, the strength of the magnetic field is controlled through the magnitude of current while the relative position of a magnetic pole and the workpiece is moved, further the pressure of the abrasive particles in the magnetorheological fluid on the surface of the workpiece is controlled, and point-by-point controllable precise polishing processing of the surface of the narrow inner cavity is realized.
The working principle of the invention is as follows:
the vibration of the vibration platform 16 is transmitted to the narrow cavity 7 through the clamp 27, at the moment, magnetorheological polishing liquid is introduced into the narrow cavity 7 through the first hose 14 of the inlet 25, relative slippage is formed between the magnetorheological polishing liquid and the surface of the narrow inner cavity 7 through the vibration of the vibration platform 16, after the electromagnetic coil 10 is electrified, the magnetic pole 8 generates a magnetic field, under the action of the magnetic field, the surface of the narrow inner cavity 7 can be subjected to the pressure of the magnetorheological polishing liquid, and the surface of the inner cavity is polished under the action of the pressure and the slippage of the magnetorheological polishing liquid;
the strength of the magnetic field 8 is adjusted by controlling the current of the electromagnetic coil 10, so as to control the removal amount of the surface of the narrow inner cavity 7;
the knife handle 9 can realize the movement of the magnetic pole 8 on an X-Y axis plane under the control of a numerical control machine tool, thereby realizing the change of the relative position of the magnetic pole 8 and the narrow inner cavity 7 and realizing the point-by-point finishing processing of the surface of the narrow inner cavity 7 without dead points;
after one surface of the narrow inner cavity 7 is finished, the direction of the magnetic field 8 is changed by changing the current direction of the electromagnetic coil 10, so that the other surface of the narrow inner cavity 7 is pressed by the magnetorheological polishing liquid, and the other surface of the narrow inner cavity 7 is finished, so that the upper surface and the lower surface of the narrow inner cavity 7 can be completely finished, the processed magnetorheological polishing liquid flows into the charging barrel 5 from the second hose 6, and the cyclic utilization of the magnetorheological polishing liquid is ensured.
A two-dimensional ultrasonic vibration magnetorheological suspensions precision finishing processingequipment:
s1; fixing the workpiece 23 on the fixture 27, and enabling the workpiece 23 to be in the variable magnetic field system 22;
s2; connecting the first hose 14 and the second hose 6 to the inlet 25 and the outlet 26, respectively, of the narrow internal cavity 7 of the workpiece 23, forming a loop with the supply system 20 for supplying the magnetic abrasive material;
s3; starting the feeding system 20, and introducing magnetorheological polishing solution into the narrow inner cavity 7 to fill the narrow inner cavity 7 with the magnetorheological polishing solution;
s4; starting the vibration system 28 to enable the magnetorheological polishing solution in the workpiece 23 to start to vibrate under the action of the vibration platform 16;
s5; electrifying the variable magnetic field system 22, subjecting the surface of the narrow inner cavity 7 to the pressure of the magnetic grinding materials, and finishing the narrow inner surface under the action of the pressure and the slippage of the magnetic grinding materials; the intensity of the variable magnetic field can be adjusted by controlling the size of the current to be introduced so as to control the removal amount of the surface of the narrow inner cavity 7;
the variable magnetic field system 22 is driven by the moving mechanism 14 to move, so that the relative position of the variable magnetic field system 22 and the narrow inner cavity 7 is changed, and the point-by-point finishing processing without dead points on the surface of the narrow inner cavity 7 is realized.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A two-dimensional ultrasonic vibration magnetorheological suspensions precision finishing processingequipment which characterized in that: comprises a feeding system (20) for providing magnetic abrasive, a vibration system (28) for transverse and longitudinal compound vibration, a variable magnetic field system (22) and a workpiece (23) with a narrow inner cavity (7);
the feeding system is communicated with a narrow inner cavity (7) of a workpiece (23) through an inlet hose and an outlet hose to form a loop, the workpiece (23) is connected with a vibration system (28) and is positioned inside a variable magnetic field system (22), the vibration system (28) drives the workpiece (23) to vibrate, so that relative slippage is formed between magnetic abrasive and the surface of the narrow inner cavity (7), and under the action of a magnetic field of the variable magnetic field system (22), the surface of the narrow inner cavity (7) is subjected to the pressure of the magnetic abrasive, and the surface of the narrow inner cavity (7) is subjected to polishing under the action of the pressure and slippage of the magnetic abrasive; the variable magnetic field system (22) can adjust the intensity of the magnetic field and control the removal amount of the surface of the narrow inner cavity (7);
the variable magnetic field system is connected with a moving mechanism (24), and the moving mechanism (24) changes the relative position of the variable magnetic field system and the narrow inner cavity (7) to realize the point-by-point finishing without dead points on the surface of the narrow inner cavity (7).
2. The two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device according to claim 1, which is characterized in that: the feeding system (20) comprises a rack (1), a material pushing cylinder (3), a material barrel (5) and a hydraulic cylinder (2);
the material pushing cylinder (3) is placed on the rack (1), one end of the material pushing cylinder (3) is connected with the hydraulic cylinder (2), a material pushing piston (4) is arranged in the material pushing cylinder (3), the material pushing piston (4) is connected with a piston rod of the hydraulic cylinder (2), the other end of the material pushing cylinder (3) is communicated with the narrow inner cavity (7) through a first hose (14), the material pushing cylinder (3) is communicated with a material cylinder (5) located at the top of the material pushing cylinder, and the narrow inner cavity (7) is communicated with the material pushing cylinder (3) through a second hose (6).
3. The two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device according to claim 2, characterized in that: an inlet (25) and an outlet (26) are arranged on the narrow inner cavity (7), the inlet (25) is connected with the first hose (14), a hard straight pipe (21) is arranged on the inner side of the inlet (25), and the hard straight pipe (21) is led into the innermost side of the narrow inner cavity (7); the outlet (26) is connected to the second hose (6).
4. The precise finishing device of the two-dimensional ultrasonic vibration magnetorheological fluid according to any one of claims 1 to 3, which is characterized in that: the vibration system (28) comprises a box body (11) and a vibration platform (16) arranged in the box body (11);
the ultrasonic vibration box is characterized in that an ultrasonic vibration rod (13) is transversely and longitudinally arranged in the box body (11) respectively, the two ultrasonic vibration rods (13) are connected with the vibration platform (16), a clamp (27) is arranged at the top of the vibration platform (16), and the clamp (27) is connected with a workpiece (23).
5. The two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device according to claim 4, characterized in that: the other side of the vibration platform (16) opposite to the two ultrasonic vibration rods (13) is connected with a sliding groove, a sliding block (17) is connected in the sliding groove in a sliding mode, a spring pressing sheet (18) is connected to the sliding block (17), and the spring pressing sheet (18) is hinged to one end of the sliding block (17) through a pin (19) and is in free contact with the other end of the sliding block (17);
a bolt (12) is arranged on the box body (11) and close to the spring pressing piece (18), and one end, located on the box body (11), of the bolt (12) is tightly attached to the spring pressing piece (18).
6. The two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device according to claim 5, characterized in that: the bolt (12) is connected with a nut (15) close to the outer wall of the box body (11).
7. The two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device according to claim 4, characterized in that: the variable magnetic field system (22) comprises a frame body (29) with an opening at one side, magnetic poles (8) are arranged at the top and the bottom of the opening of the frame body (29), and a workpiece (23) is positioned between the two magnetic poles (8); an electromagnetic coil (10) is arranged on one side of the frame body (29) far away from the opening.
8. The two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device according to claim 7, characterized in that: the moving mechanism (24) comprises a numerical control machine tool and a tool handle (9), the tool handle (9) is connected to the top of the frame body (29), and the tool handle (9) drives the variable magnetic field system (22) to move under the control of the numerical control machine tool.
9. The two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device according to claim 8, characterized in that: the magnetic abrasive of the feeding system (20) is magnetorheological polishing liquid.
10. The processing method of the two-dimensional ultrasonic vibration magnetorheological fluid precision finishing processing device of claim 1, which is characterized in that: s1; fixing the workpiece (23) on a fixture (27) to enable the workpiece (23) to be in a variable magnetic field system (22);
s2; connecting a first hose (14) and a second hose (6) to an inlet (25) and an outlet (26) respectively of a narrow inner cavity (7) of a workpiece (23) to form a loop with a supply system (20) for supplying magnetic abrasive material;
s3; starting the feeding system (20), and introducing magnetorheological polishing solution into the narrow inner cavity (7) to fill the narrow inner cavity (7) with the magnetorheological polishing solution;
s4; starting a vibration system (28) to enable magnetorheological polishing liquid in the workpiece (23) to start to vibrate under the action of a vibration platform (16);
s5; electrifying the variable magnetic field system (22), subjecting the surface of the narrow inner cavity (7) to the pressure of the magnetic grinding materials, and finishing the narrow inner surface under the action of the pressure and the slippage of the magnetic grinding materials; the intensity of the variable magnetic field can be adjusted by controlling the size of the current to be introduced so as to control the removal amount of the surface of the narrow inner cavity (7);
the variable magnetic field system (22) is driven by the moving mechanism (14) to move, so that the relative position of the variable magnetic field system (22) and the narrow inner cavity (7) is changed, and the point-by-point finishing processing without dead points on the surface of the narrow inner cavity (7) is realized.
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| CN116038444A (en) * | 2023-03-27 | 2023-05-02 | 四川托璞勒科技有限公司 | Ultrasonic grinder |
| WO2024000759A1 (en) * | 2022-06-29 | 2024-01-04 | 大连理工大学 | Multi-field auxiliary abrasive flushing and polishing method and device |
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| CN109500665A (en) * | 2019-01-17 | 2019-03-22 | 太原理工大学 | The round tube inner wall precision finishing method of elliptical vibration compound static pressure abrasive flows |
| CN110000624A (en) * | 2019-05-16 | 2019-07-12 | 东北大学 | A kind of Magnetorheological Polishing equipment |
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