CN111915977A - Experimental platform for novel fluid dynamic pressure polishing research - Google Patents
Experimental platform for novel fluid dynamic pressure polishing research Download PDFInfo
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- CN111915977A CN111915977A CN202010921104.1A CN202010921104A CN111915977A CN 111915977 A CN111915977 A CN 111915977A CN 202010921104 A CN202010921104 A CN 202010921104A CN 111915977 A CN111915977 A CN 111915977A
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- 238000005498 polishing Methods 0.000 title claims abstract description 136
- 239000012530 fluid Substances 0.000 title claims abstract description 37
- 238000011160 research Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 87
- 238000006073 displacement reaction Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000009530 blood pressure measurement Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000007517 polishing process Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
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- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention relates to an experimental platform for novel fluid dynamic pressure polishing research, which comprises a machine tool, a polishing roller, a feeding unit and a sensor. The polishing roller is arranged on the machine tool, and the feeding unit comprises a reciprocating feeding mechanism, a first micro-feeding mechanism and a second micro-feeding mechanism; the reciprocating feeding mechanism drives the workpiece to reciprocate to polish uniformly, and the displacement of the first micro-feeding mechanism and the second micro-feeding mechanism can accurately adjust the height difference and the distance between the clamped workpiece and the polishing roller to form a micro gap; the sensor comprises an eddy current displacement sensor and a pressure sensor, the eddy current displacement sensor is used for detecting the distance between the workpiece and the polishing roller, and the pressure sensor is used for monitoring the dynamic pressure of the polishing fluid in real time. The experimental platform has the advantages that the design of each mechanism is perfect, a displacement and pressure measurement and control system is assisted, each process parameter is flexibly adjustable, and the deep research on the mechanism and control of the fluid dynamic pressure polishing waviness can be realized.
Description
Technical Field
The invention belongs to the field of polishing experimental devices, and particularly relates to an experimental platform for novel fluid dynamic pressure polishing research.
Background
With the development of modern science and technology, the requirements on the surface of materials are gradually increased. Polishing is one of the oldest surface quality improvement processes, a traditional contact polishing tool is in direct contact with a workpiece to be polished, and has considerable material removal rate, but the rigid contact between the traditional contact polishing tool and the workpiece makes polishing abrasive particles easily leave scratches on the surface of the workpiece, additional surface and sub-surface defects are introduced, and the requirements of various precision industries on the surface quality are difficult to meet.
In recent years, based on deep research on a processing mechanism, scholars at home and abroad propose a series of novel non-contact polishing technologies combining principles of electromagnetic field, hydromechanics, three beams, chemical action and the like, and hydrodynamic pressure polishing is the most typical one of the technologies, and the technology is based on hydrodynamic pressure lubrication.
The existing research of fluid dynamic pressure polishing mainly focuses on principle research, flow field pressure simulation measurement and other aspects, and the actual processing capacity is not further explored. For fluid dynamic pressure polishing processing similar to grinding wheel grinding, the surface waviness is an important index for evaluating the processing quality, and the generation mechanism of the surface waviness is closely related to the precision, the feeding mechanism and the process scheme of an experimental platform. Therefore, a novel fluid dynamic pressure polishing experimental platform with complete feeding mechanism and complete functions is designed on the basis of the flow lubrication principle so as to meet the research requirement that fluid dynamic pressure polishing breaks through the processing limit.
Disclosure of Invention
Based on the above-mentioned shortcomings and drawbacks of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide an experimental platform for new fluid dynamic pressure polishing research that meets one or more of the above-mentioned needs.
In order to achieve the purpose, the invention adopts the following technical scheme:
an experimental platform for novel fluid dynamic pressure polishing research comprises a machine tool, a polishing roller, a feeding unit and a sensor;
the polishing roller is arranged on a machine tool, the feeding unit comprises a reciprocating feeding mechanism, a first micro-feeding mechanism, a second micro-feeding mechanism and a clamping mechanism, the clamping mechanism is used for clamping a workpiece, the reciprocating feeding mechanism is arranged on the machine tool, the reciprocating feeding mechanism drives the first micro-feeding mechanism, the first micro-feeding mechanism drives the second micro-feeding mechanism, the second micro-feeding mechanism drives the clamping mechanism, and the clamping mechanism is used for clamping the workpiece; the second micro-feeding mechanism is used for adjusting the distance between the workpiece and the polishing roller; the first micro-feeding mechanism is used for adjusting the height difference between the workpiece and the polishing roller; the reciprocating feeding mechanism is used for linking the workpiece to reciprocate so that the polishing roller performs surface processing on the workpiece;
the sensor comprises an eddy current displacement sensor and a pressure sensor, the eddy current displacement sensor is used for detecting the distance between the workpiece and the polishing roller, and the pressure sensor is used for monitoring the dynamic pressure of the polishing fluid in real time; both sensors are mounted on the fixture.
In a preferred embodiment according to the present invention, the first micro-feeding mechanism comprises a first spiral micro-dividing head, a first fixed table, a first movable table, a first slide rail; the first fixed table top is fixedly connected with the reciprocating feeding mechanism, and the first movable table top and the first fixed table top are in sliding fit through a first sliding rail; the first spiral differential head is fixed on the first fixed table top and is abutted against the first movable table top to control the feeding displacement of the first movable table top; the second micro-feeding mechanism comprises a second spiral micro-dividing head, a second fixed table top, a second movable table top and a second sliding rail; the second fixed table top is fixedly connected with the first movable table top, and the second movable table top and the second fixed table top are in sliding fit through a second sliding rail; the second spiral differential head is fixed on the second fixed table-board and is propped against the second movable table-board to control the second movable table-board to move in the vertical direction.
In a preferred embodiment according to the present invention, return springs are provided between the first fixed table top and the first movable table top, and between the second fixed table top and the second movable table top.
In a preferred embodiment according to the present invention, the reciprocating feeding mechanism comprises a housing, a servo motor, a lead screw nut, a hollow slide column, an i-shaped slide rail; the shell is arranged on the rack, the hollow sliding column is connected with the shell in a sliding mode through an I-shaped sliding rail, and the I-shaped sliding rail and the edge of the polishing roller are arranged in parallel in a tangential direction; the servo motor is fixed on the shell and connected with the lead screw, the lead screw is in threaded connection with a lead screw nut fixed with the hollow sliding column, and the servo motor drives the hollow sliding column to slide back and forth along the I-shaped sliding rail through the lead screw and the lead screw nut; the first micro-feeding mechanism is arranged on the hollow slide column.
In a preferred embodiment according to the present invention, the clamping mechanism comprises a connecting plate, a work rest, a work disc, a locking screw; one end of the connecting plate is fixedly connected with the second micro-feeding mechanism, and the other end of the connecting plate is fixedly connected with the workpiece frame; the workpiece rack is provided with a T-shaped groove, and the workpiece disc is in sliding fit with the workpiece rack through the T-shaped groove; one side of the workpiece frame is provided with a screw hole which transversely penetrates through the T-shaped groove, and the locking screw is screwed into the screw hole to tightly lock the workpiece disc and the workpiece frame; the center of the workpiece tray is provided with a workpiece mounting slot position, and the workpiece tray is provided with a hand-held part.
In a preferred embodiment according to the present invention, a plurality of workpiece mounting slots are disposed in the workpiece tray.
In a preferred embodiment of the present invention, the machine tool comprises a frame, a polishing trough, a polishing roller holder, and a spindle system, wherein the polishing trough is embedded in the frame, the spindle system is arranged in the frame, an output end of the spindle system penetrates through the bottom surface of the polishing trough to the interior of the polishing trough, and the polishing roller holder is connected with the output end of the spindle system and can be driven to rotate by the spindle system.
In a preferred embodiment according to the invention, the polishing trough has a liquid discharge slope, and a liquid discharge port is arranged at the lower part of the liquid discharge slope.
In a preferred embodiment according to the invention, the polishing roller has a radius of 500-650mm and a thickness of 100-150 mm.
In a preferred embodiment according to the invention, the side surfaces of the polishing rollers are uniformly distributed with micro-groove structures, the depth of the micro-groove structures is 2-6mm, the central angle of the occupied arc length is 12-24 degrees, and the distribution number is 9-15.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to an experimental platform for novel fluid dynamic pressure polishing research, wherein a reciprocating feeding mechanism drives a workpiece to stably reciprocate in the polishing process, so that each point on the surface of the workpiece is uniformly polished; the micro-feeding mechanism is matched with the eddy current displacement sensor, so that accurate feeding of a polishing gap can be realized on one hand, and the workpiece can be conveniently loaded, unloaded and positioned on the other hand. The invention has perfect mechanism design, is assisted by a displacement and pressure measurement and control system, has flexibly adjustable technological parameters and can realize the deep research on the mechanism and control of the hydrodynamic pressure polishing waviness of the fluid.
Drawings
FIG. 1 is a schematic structural diagram of an experimental platform for a new hydrodynamic polishing study according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a feeding unit of an experimental platform for a new hydrodynamic polishing study according to a first embodiment of the present invention;
FIG. 3 is a machine tool assembly drawing of an experimental platform for new fluid dynamic pressure polishing research according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of a polishing roller structure of an experimental platform for a new fluid dynamic pressure polishing study according to a first embodiment of the present invention;
FIG. 5 is an assembly drawing of the reciprocating feeding mechanism of the experimental platform for the new fluid dynamic pressure polishing research according to the first embodiment of the present invention;
FIG. 6 is a drawing of a micro-feeding mechanism assembly of an experimental platform for a new hydrodynamic polishing study, according to a first embodiment of the present invention;
FIG. 7 is an assembly view of a clamping mechanism of an experimental platform for a new fluid dynamic pressure polishing study according to a first embodiment of the present invention;
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1: as shown in fig. 1, an experimental platform for a new fluid dynamic pressure polishing research according to an embodiment of the present invention is composed of a machine tool 10, a polishing roller 20, a reciprocating feeding mechanism 30, a micro-feeding mechanism 40, and a clamping mechanism 50, wherein the machine tool is structured as shown in fig. 3, a frame 11 as a main body of the machine tool is a square hollow housing with a square groove at the upper part, and four feet are arranged at the bottom; the upper portion is slotted to embedded install polishing groove 12, and the polishing groove is the square groove of high all around low, middle axle hole, drain hole are opened to four corners in the middle of the bottom, and the top edge of polishing groove outwards protrudes, and the screw runs through the bulge will polish the fixed embedding frame of groove in. The spindle system is arranged in the frame, the output end of the spindle system penetrates through the shaft hole of the polishing groove and is exposed outside, and mechanical seal is adopted between the output end and the polishing groove to prevent polishing liquid from flowing into the spindle system. The output end is provided with a polishing roller bracket 13 which is a disc with a slightly arc-shaped sunken top surface and is provided with vertically through positioning holes, four groups of the positioning holes are arranged along the circumferential direction of the bracket, and two positioning holes are arranged in each group along the radial direction.
The polishing roller is mounted on the polishing roller bracket, and as shown in fig. 4, the polishing roller is a hollow cylinder with 12 micro-groove structures 21 on the side surface, the size of the cylinder is 600mm in diameter, the projection of the micro-groove to the horizontal direction is rectangular, the width of the micro-groove is 24 degrees, and the depth of the micro-groove is 2 mm.
A reciprocating feeding mechanism 30 is arranged at one corner of the top of the rack, and the structure of the reciprocating feeding mechanism is shown in fig. 5 and comprises a shell 37, a servo motor 31, a lead screw 32, a lead screw nut 35, a hollow sliding column 36, an I-shaped sliding rail 33 and a side sliding block 34; the shell is fixed on the upper surface of the rib plate through a screw, the servo motor is arranged along the direction parallel to the edge of the side rack and is provided with a mounting seat, and the servo motor is fixedly connected to the outer wall of one end of the shell through the mounting seat and the screw and penetrates into the shell; the hollow sliding column penetrates into the shell from the other end part of the shell, one end of a screw rod is connected with a servo motor shaft through a coupler, the other end of the screw rod extends into the hollow sliding column, a screw rod nut penetrates through and is fixed on the side, close to the screw rod, of the hollow sliding column, the screw rod nut is matched with the screw rod, the hollow sliding column is connected with the shell in a sliding mode through an I-shaped sliding rail, the hollow sliding column is abutted against the inner side wall of the shell from two sides through two side sliding blocks, and a micro-feeding structure is installed at one end; the servo motor can be controlled by a servo motor PLC, and when the servo motor drives the lead screw to rotate, the lead screw nut can drive the hollow sliding column to reciprocate along the axial direction of the lead screw, so that the micro-feeding mechanism is driven to reciprocate along the tangential direction of the polishing roller.
The structure of the micro-feeding mechanism 40 is shown in fig. 6, and includes a first spiral differential head 41, a first fixed table 42, a first movable table 44, a first slide rail 43, a second spiral differential head 45, a second fixed table 46, a second guide rail 47, and a second movable table 48; the first movable table top and the first fixed table top are in sliding fit through a first sliding rail, the first sliding rail is arranged along the vertical direction, the first movable table top and the first fixed table top are provided with protruding parts corresponding in position, a first spiral differential head is parallel to the first sliding rail and penetrates through and is fixed on the protruding part of the first fixed table top, the end part of a measuring rod abuts against the protruding part of the first movable table top, and the first spiral differential head is rotated to drive the first movable table top to accurately and slightly feed along the first sliding rail, so that the first movable table top vertically moves towards or away from the polishing roller; the second fixed table surface is fixedly connected to the first movable table surface through screws, and the second fixed table surface, the second movable table surface, the second slide rail and the second spiral differential head are combined in the same manner as the above, and the difference is that the second fixed table surface, the second movable table surface, the second slide rail and the second spiral differential head are integrally rotated by 90 degrees, so that the second table surface is driven to move towards or away from the polishing roller in parallel when the second spiral differential head is rotated.
The overall assembly mode of the reciprocating feeding mechanism, the micro-feeding mechanism and the clamping mechanism is shown in fig. 2, the structure of the clamping mechanism is shown in fig. 7, the clamping mechanism 50 is arranged on the second movable table top and comprises a connecting plate 51, a workpiece frame 52, a workpiece disc 53, a workpiece mounting groove 54 and a locking screw 55; the connecting plate is L-shaped, the front end of the connecting plate is provided with a ribbed plate extending out, the ribbed plate is fixedly connected to the micro-feeding structure through a screw hole, the front end of the connecting plate extends to the axis of the polishing roller and is bent to the middle part and vertically downward, and the rear end of the connecting plate is fixedly connected with the workpiece frame; the workpiece rack is provided with a T-shaped groove, and the workpiece disc is in sliding fit with the workpiece rack through the T-shaped groove; one side of the workpiece frame is provided with a screw hole which transversely penetrates through the T-shaped groove, and the workpiece disc and the workpiece frame can be tightly locked by screwing the locking screw into the screw hole; the center of the workpiece tray is provided with a workpiece mounting groove, and the side surface of the workpiece tray at the opening of the T-shaped groove is also provided with a long handle protruding outwards, so that the workpiece tray can be conveniently assembled and disassembled. When the reciprocating feeding mechanism and the micro-feeding mechanism move, the displacement can be transmitted to the clamping mechanism, so that the workpiece on the workpiece mounting groove position is driven to feed in a reciprocating manner or in a micro-feeding manner. The workpiece frame is also provided with two sensors, one is an eddy current displacement sensor, and can be matched with the micro-feeding mechanism to realize accurate control of the polishing clearance and ensure that a dynamic pressure liquid film can be formed in a tiny clearance; one is a pressure sensor which can monitor the dynamic pressure of the polishing fluid in real time and is used for the research on the dynamic pressure and the shearing characteristic of a flow field.
The method of use of the present invention will now be described in conjunction with the above structure:
the polishing steps of the workpiece are as follows:
polishing preparation: fixing the workpiece to the workpiece mounting groove 54 by paraffin, sliding the workpiece tray 53 into the workpiece holder 52 along the T-shaped groove, and then rotating the locking screw 55 to position the workpiece tray; pouring the specific polishing solution into the polishing tank 12 until the specified scale mark is reached; the second spiral differential head 45 is rotated by matching with an eddy current displacement sensor, the second movable table board moves forwards, so that the workpiece is driven to approach the polishing roller 20 until the polishing clearance between the workpiece and the polishing roller reaches the requirement of an experiment, the first spiral differential head 41 is rotated, the clamping mechanism 50 is driven to move downwards, the workpiece is driven to descend by a specified depth, and the polishing solution is immersed.
And (3) polishing: the polishing roller 20 rotates to enable polishing liquid to enter a convergence gap of the micro-groove structure 21 at a certain speed to form a fluid dynamic pressure liquid film which is uniformly distributed, so that abrasive particles are driven to impact the surface of a workpiece, and the non-contact polishing material is removed; at the same time, the servo motor 31 starts to work to drive the screw rod 32 to rotate, and the hollow sliding column 36 reciprocates along the side sliding block 34 and the linear sliding rail 33 through the screw rod nut 35. The micro-feeding mechanism 40 and the clamping mechanism 50 connected with the end part of the hollow slide column 36 gradually transmit the motion to the workpiece, so that the workpiece realizes reciprocating motion with specified amplitude in the polishing process, and thus, the uniform polishing of each point on the surface of the workpiece is realized.
And (3) polishing post-treatment: after a certain period of polishing, the power source of the spindle system and the servo motor 31 are turned off. Reversely rotating the second spiral differential head 45 to make the workpiece far from the polishing roller 20, and reversely rotating the first spiral differential head 41 to make the workpiece float out of the polishing liquid level; opening a liquid outlet at the bottom of the polishing tank 12 to discharge the polishing liquid; after the locking screw 55 is screwed out, the workpiece disc 53 is taken out; the workpiece tray 53 is heated, and the polished workpiece is taken out.
In the polishing process, the precise control of the thickness of the micro-gap is realized by matching an eddy current displacement sensor arranged on a workpiece frame with a micro-feeding mechanism; and the dynamic pressure of the polishing fluid is monitored in real time through the pressure sensor, the dynamic pressure and the shearing characteristic of a dynamic pressure polishing flow field of the fluid are researched, and further, a theoretical basis is provided for the control of the polishing waviness.
It is worth noting that: the polishing roller and the micro-groove structure parameters thereof selected by the experimental platform for the novel fluid dynamic pressure polishing research in the embodiment are used for machining rough polishing pieces with higher material removal rate, and the shape of the micro-groove structure can also adopt different combination modes of trapezoid, rectangle and arc according to the size of a workpiece and the machining requirements. In other practical application scenarios, the parameters can be selected differently on the premise of meeting the idea of the present invention, for example, for the rough polishing piece, i.e., the removal rate of the heavy material, a polishing roller with a rectangular micro-groove structure of more than 600mm is selected, and the size (the number x is deep and the width x) of the micro-groove structure is selected: 12x 2mm x24 °; for processing a fine polishing piece, namely emphasizing the removal uniformity and controlling the waviness, a trapezoidal or arc micro-groove structure polishing roller with the thickness of less than 600mm and the size of a micro-groove structure (the number x is deep and the width x is wide) are selected: 15x 6mm x 12 °.
The range of the clearance during polishing is 1-100 filaments, so that a dynamic pressure liquid film can be formed in a tiny clearance.
In the selection of the polishing solution, the polishing solution is of polycrystalline diamond, amorphous silicon dioxide, silicon carbide and the like; the viscosity of the polishing solution can be adjusted by a thickening agent or a concentration parameter to be 10-100cps, and the specific selection parameter is mainly determined according to the parameter of a workpiece to be polished, the glass is selected from silicon carbide, the metal is selected from diamond and the like, the abrasive particles with the particle size of 1 micron or more are selected for removing the materials, the processing uniformity is emphasized, the waviness is controlled, and the abrasive particles with the particle size of 100nm or less are selected. The spindle speed can also be selected from a value of 0-3000rpm according to different specific machining requirements and additional run-out errors.
Example 2: in another embodiment of the experimental platform for the new fluid dynamic pressure polishing research according to the present invention, a right-angle rib plate is disposed at one corner of the top of the frame 11, and the reciprocating feeding mechanism is mounted on the right-angle rib plate.
Other structures can refer to embodiment 1.
Example 3: in another embodiment of the experimental platform for the new fluid dynamic pressure polishing research according to the present invention, a return spring disposed along the direction of the corresponding slide rail is disposed between the movable table top and the fixed table top in the micro-feeding mechanism, and two ends of the return spring respectively abut against the inner walls of the movable table top and the fixed table top, so that a thrust can be provided when the spiral differential head rotates reversely, and the return can be responded quickly.
Other structures can refer to embodiment 1.
Example 4: in another embodiment of the experimental platform for the novel fluid dynamic pressure polishing research according to the invention, the length of the workpiece disc close to the polishing roller surface is lengthened, the back surface of the workpiece disc is inserted into the workpiece frame through a T-shaped groove, and a plurality of workpiece mounting grooves are horizontally arranged close to the polishing roller surface, so that the simultaneous polishing of a plurality of workpieces and the dynamic pressure polishing research thereof can be realized.
Other structures can refer to embodiment 1.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (10)
1. An experimental platform for novel fluid dynamic pressure polishing research comprises a machine tool, a polishing roller, a feeding unit and a sensor;
the polishing roller is arranged on a machine tool, the feeding unit comprises a reciprocating feeding mechanism, a first micro-feeding mechanism, a second micro-feeding mechanism and a clamping mechanism, the clamping mechanism is used for clamping a workpiece, the reciprocating feeding mechanism is arranged on the machine tool, the reciprocating feeding mechanism drives the first micro-feeding mechanism, the first micro-feeding mechanism drives the second micro-feeding mechanism, the second micro-feeding mechanism drives the clamping mechanism, and the clamping mechanism is used for clamping the workpiece; the second micro-feeding mechanism is used for adjusting the distance between the workpiece and the polishing roller; the first micro-feeding mechanism is used for adjusting the height difference between the workpiece and the polishing roller; the reciprocating feeding mechanism is used for linking the workpiece to reciprocate so that the polishing roller performs surface processing on the workpiece;
the sensor comprises an eddy current displacement sensor and a pressure sensor, the eddy current displacement sensor is used for detecting the distance between the workpiece and the polishing roller, and the pressure sensor is used for monitoring the dynamic pressure of the polishing fluid in real time; both sensors are mounted on the fixture.
2. The experimental platform for a novel hydrodynamic polishing study as claimed in claim 1, wherein the first micro-feeding mechanism comprises a first spiral micro-dividing head, a first fixed table, a first movable table, a first slide rail; the first fixed table top is fixedly connected with the reciprocating feeding mechanism, and the first movable table top and the first fixed table top are in sliding fit through a first sliding rail; the first spiral differential head is fixed on the first fixed table top and is abutted against the first movable table top to control the feeding displacement of the first movable table top; the second micro-feeding mechanism comprises a second spiral micro-dividing head, a second fixed table top, a second movable table top and a second sliding rail; the second fixed table top is fixedly connected with the first movable table top, and the second movable table top and the second fixed table top are in sliding fit through a second sliding rail; the second spiral differential head is fixed on the second fixed table-board and is propped against the second movable table-board to control the second movable table-board to move in the vertical direction.
3. The experimental platform for the new fluid dynamic pressure polishing research as claimed in claim 2, wherein a return spring is provided between the first fixed platform surface and the first movable platform surface, and between the second fixed platform surface and the second movable platform surface.
4. The experimental platform for new fluid dynamic pressure polishing research as claimed in claim 1, wherein the reciprocating feeding mechanism comprises a housing, a servo motor, a lead screw nut, a hollow slide column, an i-shaped slide rail; the shell is arranged on the rack, the hollow sliding column is connected with the shell in a sliding mode through an I-shaped sliding rail, and the I-shaped sliding rail and the edge of the polishing roller are arranged in parallel in a tangential direction; the servo motor is fixed on the shell and connected with the lead screw, the lead screw is in threaded connection with a lead screw nut fixed with the hollow sliding column, and the servo motor drives the hollow sliding column to slide back and forth along the I-shaped sliding rail through the lead screw and the lead screw nut; the first micro-feeding mechanism is arranged on the hollow slide column.
5. The experimental platform for a novel fluid dynamic pressure polishing study as claimed in claim 1, wherein said clamping mechanism comprises a connecting plate, a workpiece holder, a workpiece disk, a locking screw; one end of the connecting plate is fixedly connected with the second micro-feeding mechanism, and the other end of the connecting plate is fixedly connected with the workpiece frame; the workpiece rack is provided with a T-shaped groove, and the workpiece disc is in sliding fit with the workpiece rack through the T-shaped groove; one side of the workpiece frame is provided with a screw hole which transversely penetrates through the T-shaped groove, and the locking screw is screwed into the screw hole to tightly lock the workpiece disc and the workpiece frame; the center of the workpiece tray is provided with a workpiece mounting slot position, and the workpiece tray is provided with a hand-held part.
6. The experimental platform for new fluid dynamic pressure polishing research as claimed in claim 5, wherein a plurality of workpiece mounting slots are arranged on the workpiece tray.
7. The experimental platform for new fluid dynamic pressure polishing research as claimed in claim 1, wherein the machine tool comprises a frame, a polishing trough, a polishing roller holder, and a spindle system, the polishing trough is embedded in the frame, the spindle system is disposed in the frame, the output end of the spindle system penetrates through the bottom surface of the polishing trough to the inside of the polishing trough, and the polishing roller holder is connected with the output end of the spindle system and can be driven to rotate by the spindle system.
8. The experimental platform for the new fluid dynamic pressure polishing research as claimed in claim 7, wherein the polishing trough has a liquid discharge slope, and a liquid discharge port is arranged at the lower part of the liquid discharge slope.
9. The experimental platform for new hydrodynamic polishing research as claimed in claim 1, wherein the polishing roller has a radius of 500-650mm and a thickness of 100-150 mm.
10. The experimental platform for the new fluid dynamic pressure polishing research as claimed in claim 1, wherein the lateral surface of the polishing roller is uniformly distributed with micro-groove structures, the depth of the micro-groove structures is 2-6mm, the central angle of the occupied arc length is 12-24 degrees, and the distribution number is 9-15.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113021163A (en) * | 2021-03-09 | 2021-06-25 | 浙江工业大学 | Detachable linear hydrodynamic pressure polishing roller and polishing device comprising same |
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| CN111915977B (en) | 2024-05-17 |
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