CN114750054A - Polishing device and polishing method for integrated display screen - Google Patents
Polishing device and polishing method for integrated display screen Download PDFInfo
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- CN114750054A CN114750054A CN202210412864.9A CN202210412864A CN114750054A CN 114750054 A CN114750054 A CN 114750054A CN 202210412864 A CN202210412864 A CN 202210412864A CN 114750054 A CN114750054 A CN 114750054A
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
Abstract
The invention discloses a polishing device and a polishing method for an integrated display screen, which comprise an XYZ three-axis machine tool, a working table surface arranged on the XYZ three-axis machine tool and used for placing the integrated display screen, and a polishing device arranged on the XYZ three-axis machine tool. The ferromagnetic polishing solution prepared by the special process is restricted by the magnetic field, so that media such as the polishing solution only contact with a polishing area and do not contact with other areas of a display screen, namely, a circuit part on the polishing screen in the polishing process.
Description
Technical Field
The invention relates to the technical field of flat plate polishing, in particular to a polishing device and a polishing method for an integrated display screen.
Background
The display screens of products such as tablet computers, high-end mobile phones and the like are very precise parts. Generally, the surface of these displays is required to be polished to a perfect and flawless level, and defects such as scratches are not allowed to exist. But in links such as storage, transportation and use of products such as tablet personal computers, cell-phones, the display screen all produces the mar easily, and the display screen that has the mar has greatly influenced user's use experience.
These scratches on the display screen are on the order of a few microns deep and are generally not wiped off and require re-polishing to remove. But once the assembly of panel computer, cell-phone is accomplished, the time cost, the human cost of dismantling the display screen are all not low, and moreover, present display screen is mostly very high integrated display screen of integrated level, and the display screen is usually integrated together with display circuit etc. and the display screen can't separate with integrated circuit, because integrated circuit can not contact the polishing solution again, so this type of display screen can't polish again usually.
This also results in that the display screen can only be scrapped once scratches and other defects are generated after the integrated circuit is manufactured, and the tablet personal computer, the mobile phone and the like which are returned by the user can only be scrapped, thereby causing huge waste and resource consumption.
Disclosure of Invention
In order to solve the problem that the integrated display screen cannot be polished again in the later stage and the display screen of a flat computer cannot be polished again after defects exist in the display screen, the invention provides the integrated display screen polishing device using the ferromagnetic polishing liquid and the method thereof.
The technical scheme adopted by the invention is as follows:
a polishing device for an integrated display screen comprises an XYZ three-axis machine tool, a working table surface arranged on the XYZ three-axis machine tool and used for placing the integrated display screen, and a polishing device arranged on the XYZ three-axis machine tool, and is characterized in that the polishing device comprises a magnetic polishing wheel used for polishing the integrated display screen, a magnetic field generator arranged on one side of the magnetic polishing wheel and a polishing solution nozzle, wherein ferromagnetic polishing solution is arranged in the polishing solution nozzle.
Furthermore, the polishing device also comprises a stable polishing solution circulating system for recycling the ferromagnetic polishing solution, the stable polishing solution circulating system is communicated with an outlet pipe of the polishing solution pump and a polishing solution recovery pipe, and the polishing solution spray head is communicated with the outlet pipe of the polishing solution pump.
Furthermore, the polishing device is also provided with a three-coordinate measuring head used for detecting the position and the posture of the display screen and automatically adjusting the coordinate and the inclination compensation during polishing, and the three-coordinate measuring head is detachably arranged on the polishing device.
Furthermore, the polishing device is also provided with a CCD imaging device for detecting the position of the scratch and automatically setting a path during polishing.
Further, the ferromagnetic polishing solution is prepared from the following raw materials in parts by mass: 100 parts of base liquid, 10-20 parts of modified strontium-iron magnetic powder, 8-16 parts of super-hard abrasive micro powder, 5-15 parts of surfactant, 5-15 parts of pH regulator, 3-6 parts of dispersant, 3-6 parts of metatitanic acid, 2-4 parts of ethylene diamine tetraacetic acid and 2-4 parts of potassium permanganate;
the modified strontium-iron magnetic powder is prepared by the following steps:
a) uniformly mixing 100 parts of strontium-iron magnetic powder and 20-40 parts of coupling agent, and stirring at the high speed of 500rpm for 20-40min in a reaction kettle at the temperature of 200-250 ℃ and the pressure of 10-20 times of the atmosphere to obtain a mixture A;
b) fully and uniformly mixing the mixture A with 10-20 parts of binder, 5-10 parts of nano material and 3-6 parts of processing aid in a high-speed mixer to obtain a mixture B;
c) and extruding and granulating the mixture B by using a double screw to obtain modified strontium ferromagnetic particles, and then grinding the modified strontium ferromagnetic particles into modified strontium ferromagnetic powder with the average particle size of less than 1 mu m.
The base solution consists of 100 parts of deionized water, 50 parts of tetrahydrofuran and 10-30 parts of 4- (4-aminophenyl) morpholine-3-one;
the super-hard abrasive micro powder is selected from one of zirconium oxide, cerium oxide and titanium oxide;
the surfactant is selected from one of dodecyl ethoxy sulfobetaine, decyl dimethyl hydroxypropyl sulfobetaine and octadecyl dihydroxyethyl amine oxide;
the dispersing agent is selected from one of barium stearate, polystyrene and butyl stearate;
the coupling agent is selected from one of a chromium complex coupling agent, a silane coupling agent and a titanate coupling agent;
the adhesive is selected from one of water-resistant cyanoacrylate adhesive, high-viscosity cyanoacrylate adhesive and cyanoacrylate polysulfide adhesive;
the nano material is a carbon nano tube;
the processing aid is selected from one of epoxidized soybean oil, soft phospholipid and ethylene-vinyl acetate copolymer;
further, the preparation method of the ferromagnetic polishing solution for the integrated display screen is characterized by comprising the following steps of:
1) weighing the modified strontium-iron magnetic powder according to the proportion, gradually adding the super-hard abrasive micro powder in an equivalent amount for 5 times, and manually stirring for 5-15min for mixing after adding the super-hard abrasive micro powder each time; after the super-hard abrasive micro powder is completely added, stirring the mixture by using an electric stirrer to obtain a modified strontium iron magnetic powder mixture A wrapping the super-hard abrasive micro powder;
2) Adding deionized water with the volume of 5-15 times of that of the modified strontium-iron magnetic powder mixture A obtained in the step 1, and carrying out ultrasonic stirring for 20-40 min; gradually adding a surfactant in the stirring process to obtain a mixed solution B;
3) adding the dispersant with the formula amount into the mixed solution B, continuing to ultrasonically stir for 30-60min, and heating at 50-70 ℃ to obtain mixed solution C;
4) vacuum-distilling the mixed solution C, and vacuum-drying to obtain mixed powder D;
5) and (3) putting the mixed powder D into the base solution, simultaneously adding metatitanic acid, disodium ethylene diamine tetraacetate and potassium permanganate, ultrasonically stirring for 10-30min, finally adding a pH regulator, and regulating the pH of the solution to 3-5 to obtain the ferromagnetic polishing solution for the integrated display screen.
Further, a polishing method for an integrated display screen by using the polishing device and the ferromagnetic polishing solution is characterized by comprising the following steps: (basic configuration)
I, fixing a display screen on a working table;
II, setting the position and the height of the screen surface of the display screen, and setting the position of a scratch or a polishing area on the display screen;
III, setting the height of the polishing wheel, the moving speed of the polishing wheel and the expansion distance when the polishing wheel is polished to the edge;
IV, starting the polishing device, and slowly lifting the polishing wheel when the edge of the scratch is polished; and when entering the scratch, the polishing wheel slowly descends to obtain smooth transition, the polishing quality is improved, the ferromagnetic polishing solution is used for polishing according to set parameters to remove the scratch on the display screen, 5 micrometers are polished along the scratch every time, then whether the scratch still exists or not is checked, if the scratch still exists, the ferromagnetic polishing solution is used for polishing to remove 5 micrometers until the scratch is removed, and the depth of the scratch cannot be known, so that the ferromagnetic polishing solution can only be circularly polished downwards until the scratch is removed.
Further, a polishing method for an integrated display screen by using the polishing device and the ferromagnetic polishing solution is characterized by comprising the following steps: (enhancement configuration 1)
I, fixing a display screen on a working table top;
II, intelligently detecting and setting the position and the screen surface height of the display screen by using a three-coordinate measuring head, and intelligently detecting and setting the position or the polishing area of the scratch on the display screen by using the three-coordinate measuring head; three-coordinate measuring head for accurately detecting height position and inclination angle of display screen
III, setting the height of the polishing wheel, the moving speed of the polishing wheel and the expansion distance when the polishing wheel is polished to the edge, and sensing the inclination of the screen surface and the table top in the X direction and the Y direction through three points on the detection screen surface by using a three-coordinate measuring head, so that the compensation in the Z direction is carried out in the polishing process, and the heights of the polishing wheel and the workpiece are consistent when the polishing wheel is polished to any point on the polishing screen;
IV, starting the polishing device, and slowly lifting the polishing wheel when the edge of the scratch is polished; when the polishing wheel enters the scratch, the polishing wheel slowly descends to obtain smooth transition and improve the polishing quality; and polishing the ferromagnetic polishing solution according to the set parameters to remove scratches on the display screen, polishing the ferromagnetic polishing solution for 5 micrometers along the scratches every time, then checking whether the scratches still exist, and if the scratches still exist, polishing the ferromagnetic polishing solution for 5 micrometers until the scratches are removed.
Further, a polishing method for an integrated display screen by using the polishing device and the ferromagnetic polishing solution is characterized by comprising the following steps: (enhancement configuration 2)
I, fixing a display screen on a working table top;
II, intelligently detecting and setting the height of a screen surface of the display screen by using a three-coordinate measuring head, and quickly measuring and calculating and setting the position of the display screen and the position of the scratch by using a CCD (charge coupled device) forming device;
III, setting the height of the polishing wheel, the moving speed of the polishing wheel and the expansion distance when the polishing wheel is polished to the edge, and sensing the inclination of the screen surface and the table top in the X direction and the Y direction through three points on the detection screen surface by using a three-coordinate measuring head, so that the compensation in the Z direction is carried out in the polishing process, and the heights of the polishing wheel and the workpiece are consistent when the polishing wheel is polished to any point on the polishing screen;
IV, starting the polishing device, and slowly lifting the polishing wheel when the scratch edge is polished; and when entering the scratch, the polishing wheel slowly descends to obtain smooth transition, the polishing quality is improved, the ferromagnetic polishing solution polishes according to set parameters to remove the scratch on the display screen, 5 microns are polished along the scratch every time, then whether the scratch still exists or not is checked, if the scratch still exists, 5 microns are polished again until the scratch is removed, and the depth of the scratch cannot be known, so that the polishing can only be circularly performed downwards until the scratch is removed.
Furthermore, the method is applied to direct polishing of display screens of finished products such as tablet computers.
The beneficial effects of the invention are:
a ferromagnetic polishing solution prepared by a special process is adopted, and a magnetic field is used for constraining the ferromagnetic polishing solution, so that media such as the polishing solution only contact a polishing area and do not contact other areas of a display screen in the polishing process, namely, circuit parts on the polishing screen, and the method can also directly polish the display screen of finished products such as a tablet personal computer and the like, so that the service life of the product is prolonged, and the consumption and waste of resources are reduced.
A three-coordinate measuring head and a CCD forming device are simultaneously configured on the polishing device, and the CCD forming device is used for measuring the position of a workpiece and the scratch position, so that the time consumption is short, and the efficiency is high; the three-coordinate measuring head is used for accurately detecting the height position and the inclination angle of the display screen; and because the screen surface and the working platform can not be completely parallel and have certain inclination, the inclination of the screen surface and the table top in the X direction and the Y direction can be sensed by using a three-coordinate measuring head through three points on the detection screen surface, so that the compensation in the Z direction is carried out in the polishing process, the height of a polishing wheel from a workpiece is consistent when any point on the screen is polished, and the constant polishing removal efficiency is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a polishing apparatus for an integrated display panel according to the present embodiment.
Sequence numbers in the figure: 1. an XYZ three-axis machine tool; 2. a work table; 3. a magnetic polishing wheel; 4. a magnetic field generator; 5. a polishing solution spray head; 6. a stable polishing solution circulating system; 7. pumping the polishing solution out of the tube; 8. a polishing solution recovery pipe; 9. a three-coordinate measuring head; 10. a CCD forming device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
Example 1
The embodiment introduces a polishing device for an integrated display screen, as shown in fig. 1, the polishing device comprises an XYZ three-axis machine tool 1, a working table 2 arranged on the XYZ three-axis machine tool 1 and used for placing the integrated display screen, and a polishing device arranged on the XYZ three-axis machine tool 1, wherein the polishing device comprises a magnetic polishing wheel 3 used for polishing the integrated display screen, a magnetic field generator 4 arranged on one side of the magnetic polishing wheel 3, and a polishing solution nozzle 5, and ferromagnetic polishing solution is arranged in the polishing solution nozzle 5.
In this embodiment, the polishing apparatus further includes a stable polishing solution circulation system 6 for recycling the ferromagnetic polishing solution, the stable polishing solution circulation system 6 is communicated with an outlet pipe 7 of the polishing solution and a polishing solution recovery pipe 8, and the polishing solution nozzle 5 is communicated with the outlet pipe 7 of the polishing solution.
In this embodiment, the polishing device is further provided with a three-coordinate measuring head 9 for detecting the position and the posture of the display screen and automatically adjusting the coordinate and the inclination compensation during polishing, and the three-coordinate measuring head 9 is detachably mounted on the polishing device.
In this embodiment, the polishing apparatus further includes a CCD imaging device for detecting the position of the scratch and automatically setting the path during polishing.
Example 2
This embodiment describes a polishing solution for integrated display panels.
In this embodiment, the polishing solution is a ferromagnetic polishing solution, and the ferromagnetic polishing solution is prepared from the following raw materials in parts by mass:
100 portions of base liquid
10 portions of modified strontium-iron magnetic powder
8 parts of super-hard abrasive micro-powder
5 portions of surfactant
5 portions of pH regulator
3 portions of dispersant
2 portions of ethylene diamine tetraacetic acid disodium salt
2 portions of potassium permanganate
The modified strontium iron magnetic powder is prepared by the following steps:
a) uniformly mixing 100 parts of strontium-iron magnetic powder and 20 parts of coupling agent, and stirring at a high speed of 300rpm for 20min in a reaction kettle at 200-DEG C and 10 times of atmospheric pressure to obtain a mixture A;
b) fully and uniformly mixing the mixture A with 10 parts of binder, 5 parts of nano material and 3 parts of processing aid in a high-speed mixer to obtain a mixture B;
c) and extruding and granulating the mixture B by using a double screw to obtain modified strontium ferromagnetic particles, and then grinding the modified strontium ferromagnetic particles into modified strontium ferromagnetic powder with the average particle size of less than 1 mu m.
The base liquid consists of 100 parts of deionized water, 50 parts of tetrahydrofuran and 10 parts of 4- (4-aminophenyl) morpholine-3-one.
The super abrasive micropowder is selected from zirconia.
The surfactant is selected from dodecyl ethoxy sulfobetaine.
The dispersant is selected from barium stearate.
The coupling agent is selected from chromium complex coupling agents.
The binder is selected from water resistant cyanoacrylate binders.
The nano material is carbon nano tube.
The processing aid is selected from epoxidized soybean oil.
The preparation method of the ferromagnetic polishing solution for the integrated display screen comprises the following steps:
1) weighing the modified strontium-iron magnetic powder according to the proportion, gradually adding the super-hard abrasive micro powder in an equivalent amount for 5 times, and manually stirring for 5min to mix after adding the super-hard abrasive micro powder each time; after the super-hard abrasive micro powder is completely added, stirring the mixture by using an electric stirrer to obtain a modified strontium iron magnetic powder mixture A wrapping the super-hard abrasive micro powder;
2) adding deionized water with the volume of 5 times of that of the modified strontium-iron-magnetic powder mixture A obtained in the step 1, and carrying out ultrasonic stirring for 20 min; gradually adding a surfactant in the stirring process to obtain a mixed solution B;
3) adding a dispersant in a formula amount into the mixed solution B, continuing ultrasonic stirring for 30min, and heating at 50 ℃ to obtain a mixed solution C;
4) vacuum-distilling the mixed solution C, and vacuum-drying to obtain mixed powder D;
5) and (3) putting the mixed powder D into the base solution, simultaneously adding metatitanic acid, disodium ethylene diamine tetraacetate and potassium permanganate, ultrasonically stirring for 10min, finally adding a pH regulator, and regulating the pH of the solution to 3 to obtain the ferromagnetic polishing solution for the integrated display screen.
Example 3
This embodiment describes a method for polishing an integrated display panel using the polishing apparatus of embodiment 1 and the ferromagnetic polishing solution of embodiment 2, comprising the steps of: (basic configuration)
I, fixing a display screen on a working table top 2;
II, setting the position and the screen surface height of the display screen, and setting the scratch position or the polishing area on the display screen;
III, setting the height of the polishing wheel, the moving speed of the polishing wheel and the expansion distance when the polishing wheel is polished to the edge;
IV, starting the polishing device, and slowly lifting the polishing wheel when the scratch edge is polished; and when entering the scratch, the polishing wheel slowly descends to obtain smooth transition, the polishing quality is improved, the ferromagnetic polishing solution polishes according to set parameters to remove the scratch on the display screen, 5 microns are polished along the scratch every time, then whether the scratch still exists or not is checked, if the scratch still exists, 5 microns are polished again until the scratch is removed, and the depth of the scratch cannot be known, so that the polishing can only be circularly performed downwards until the scratch is removed.
As a preferable arrangement, the polishing method for the integrated display screen by adopting the polishing device and the ferromagnetic polishing solution comprises the following steps: (enhancement configuration 1)
I, fixing a display screen on a working table top 2;
II, intelligently detecting and setting the position and the screen surface height of the display screen by using a three-coordinate measuring head 9, and intelligently detecting and setting the scratch position or the polishing area on the display screen by using the three-coordinate measuring head 9; the three-coordinate measuring head 9 is used for accurately detecting the height position and the inclination angle of the display screen
III, setting the height of the polishing wheel, the moving speed of the polishing wheel and the expansion distance when the polishing wheel is polished to the edge, and sensing the inclination of the screen surface and the table top in the X direction and the Y direction through three points on the detection screen surface by using a three-coordinate measuring head 9 so as to compensate in the Z direction in the polishing process and enable the height of the polishing wheel away from the workpiece to be consistent when any point on the polishing screen is polished;
IV, starting the polishing device, and slowly lifting the polishing wheel when the edge of the scratch is polished; and when entering the scratch, the polishing wheel slowly descends to obtain smooth transition, the polishing quality is improved, the ferromagnetic polishing solution polishes according to set parameters to remove the scratch on the display screen, 5 microns are polished along the scratch every time, then whether the scratch still exists or not is checked, if the scratch still exists, 5 microns are polished again until the scratch is removed, and the depth of the scratch cannot be known, so that the polishing can only be circularly performed downwards until the scratch is removed.
Because the imaging CCD is difficult to accurately measure the height position and the inclination angle of the display screen, the best device is also provided with a three-coordinate measuring head and the imaging CCD at the same time; the CCD is used for measuring the position of the workpiece and the scratch position, so that the time consumption is short and the efficiency is high; the three-coordinate measuring head is used for accurately detecting the height position and the inclination angle of the display screen.
The polishing method for the integrated display screen by adopting the polishing device and the ferromagnetic polishing solution comprises the following steps: (enhancement configuration 2)
I, fixing a display screen on a working table top 2;
II, intelligently detecting and setting the height of a screen surface of the display screen by using a three-coordinate measuring head 9, and quickly measuring, calculating and setting the position of the display screen and the position of a scratch by using a CCD forming device 10;
III, setting the height of the polishing wheel, the moving speed of the polishing wheel and the expansion distance when the polishing wheel is polished to the edge, and sensing the inclination of the screen surface and the table top in the X direction and the Y direction through three points on the detection screen surface by using a three-coordinate measuring head 9 so as to compensate in the Z direction in the polishing process and enable the height of the polishing wheel away from the workpiece to be consistent when any point on the polishing screen is polished;
IV, starting the polishing device, and slowly lifting the polishing wheel when the edge of the scratch is polished; and when entering the scratch, the polishing wheel slowly descends to obtain smooth transition, the polishing quality is improved, the ferromagnetic polishing solution polishes according to set parameters to remove the scratch on the display screen, 5 microns are polished along the scratch every time, then whether the scratch still exists or not is checked, if the scratch still exists, 5 microns are polished again until the scratch is removed, and the depth of the scratch cannot be known, so that the polishing can only be circularly performed downwards until the scratch is removed.
The method is applied to direct polishing of display screens of finished products such as tablet computers.
In the embodiment, the ferromagnetic polishing solution is restricted by the magnetic field, so that media such as the polishing solution only contact with a polishing area and do not contact with other areas of the display screen, namely circuit parts on the polishing screen, in the polishing process, and the method can also directly polish the display screen of finished products such as a tablet personal computer.
The three-coordinate measuring head 9 and the CCD forming device 10 are simultaneously arranged on the polishing device, and the CCD forming device 10 is used for measuring the position of a workpiece and the scratch position, so that the time consumption is short, and the efficiency is high; the three-coordinate measuring head 9 is used for accurately detecting the height position and the inclination angle of the display screen; and because the screen surface and the working platform can not be completely parallel and have certain inclination, the inclination of the screen surface and the table top in the X direction and the Y direction can be sensed by using the three-coordinate measuring head 9 through three points on the detection screen surface, so that the compensation in the Z direction is carried out in the polishing process, the height of a polishing wheel from a workpiece is consistent when any point on the screen is polished, and the constant polishing removal efficiency is ensured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The polishing device for the integrated display screen comprises an XYZ three-axis machine tool (1), a working table top (2) arranged on the XYZ three-axis machine tool (1) and used for placing the integrated display screen, and a polishing device arranged on the XYZ three-axis machine tool (1), and is characterized by comprising a magnetic polishing wheel (3) used for polishing the integrated display screen, a magnetic field generator (4) arranged on one side of the magnetic polishing wheel (3) and a polishing solution nozzle (5), wherein ferromagnetic polishing solution is arranged in the polishing solution nozzle (5).
2. The polishing apparatus for integrated display screen according to claim 1, wherein the polishing apparatus further comprises a stable polishing solution circulation system (6) for recycling ferromagnetic polishing solution, the stable polishing solution circulation system (6) connects the polishing solution pump outlet pipe (7) and the polishing solution recovery pipe (8), and the polishing solution nozzle (5) connects the polishing solution pump outlet pipe (7).
3. The polishing device for the integrated display screen according to claim 1, wherein a three-coordinate measuring head (9) is further arranged on the polishing device, and the three-coordinate measuring head (9) is detachably mounted on the polishing device.
4. The polishing device for integrated display screens of claim 1, wherein a CCD imaging device is arranged on the polishing device.
5. The polishing solution for the integrated display screen is characterized by being a ferromagnetic polishing solution, and the ferromagnetic polishing solution is prepared from the following raw materials in parts by mass: 100 parts of base liquid, 10-20 parts of modified strontium-iron magnetic powder, 8-16 parts of super-hard abrasive micro powder, 5-15 parts of surfactant, 5-15 parts of pH regulator, 3-6 parts of dispersant, 3-6 parts of metatitanic acid, 2-4 parts of ethylene diamine tetraacetic acid and 2-4 parts of potassium permanganate;
the modified strontium iron magnetic powder is prepared by the following steps:
a) uniformly mixing 100 parts of strontium-iron magnetic powder and 20-40 parts of coupling agent, and stirring at 500rpm for 20-40min at 200-250 ℃ and 10-20 times of atmospheric pressure in a reaction kettle for treatment to obtain a mixture A;
b) fully and uniformly mixing the mixture A with 10-20 parts of binder, 5-10 parts of nano material and 3-6 parts of processing aid in a high-speed mixer to obtain a mixture B;
c) And extruding and granulating the mixture B by using a double screw to obtain modified strontium ferromagnetic particles, and then grinding the modified strontium ferromagnetic particles into modified strontium ferromagnetic powder with the average particle size of less than 1 mu m.
The base solution consists of 100 parts of deionized water, 50 parts of tetrahydrofuran and 10-30 parts of 4- (4-aminophenyl) morpholine-3-one;
the super-hard abrasive micro powder is selected from one of zirconium oxide, cerium oxide and titanium oxide;
the surfactant is selected from one of dodecyl ethoxy sulfobetaine, decyl dimethyl hydroxypropyl sulfobetaine and octadecyl dihydroxyethyl amine oxide;
the dispersing agent is selected from one of barium stearate, polystyrene and butyl stearate;
the coupling agent is selected from one of a chromium complex coupling agent, a silane coupling agent and a titanate coupling agent;
the adhesive is selected from one of water-resistant cyanoacrylate adhesive, high-viscosity cyanoacrylate adhesive and cyanoacrylate polysulfide adhesive;
the nano material is a carbon nano tube;
the processing aid is selected from one of epoxidized soybean oil, soft phospholipid and ethylene-vinyl acetate copolymer.
6. The method for preparing the polishing solution for integrated display screen according to claim 5, comprising the steps of:
1) Weighing the modified strontium iron magnetic powder according to the proportion, gradually adding the super-hard abrasive micro powder in 5 times in equal amount, and manually stirring for 5-15min for mixing after adding the super-hard abrasive micro powder each time; after all the super-hard abrasive micro powder is added, stirring the mixture by using an electric stirrer to obtain a modified strontium iron magnetic powder mixture A wrapping the super-hard abrasive micro powder;
2) adding 5-15 times of deionized water into the modified strontium iron magnetic powder mixture A obtained in the step (1), and carrying out ultrasonic stirring for 20-40 min; gradually adding a surfactant in the stirring process to obtain a mixed solution B;
3) adding the dispersant with the formula amount into the mixed solution B, continuing to ultrasonically stir for 30-60min, and heating at 50-70 ℃ to obtain mixed solution C;
4) vacuum-drying the mixed solution C after reduced pressure distillation to obtain mixed powder D;
5) and (3) putting the mixed powder D into the base solution, simultaneously adding metatitanic acid, disodium ethylene diamine tetraacetate and potassium permanganate, ultrasonically stirring for 10-30min, finally adding a pH regulator, and regulating the pH of the solution to 3-5 to obtain the ferromagnetic polishing solution for the integrated display screen.
7. A polishing method for an integrated display screen using the polishing apparatus as set forth in any one of claims 1 to 2 and the polishing liquid as set forth in claim 5, characterized by comprising the steps of:
I, fixing a display screen on a working table top (2);
II, setting the position and the screen surface height of the display screen, and setting the scratch position or the polishing area on the display screen;
III, setting the height of the polishing wheel, the moving speed of the polishing wheel and the expansion distance when the polishing wheel is polished to the edge;
IV, starting the polishing device, and slowly lifting the polishing wheel when the scratch edge is polished; and when entering the scratch, the polishing wheel slowly descends to obtain smooth transition and improve the polishing quality, the ferromagnetic polishing solution polishes according to set parameters to remove the scratch on the display screen, and the scratch is polished for 5 microns along the scratch every time, and then whether the scratch still exists or not is checked, and if the scratch still exists, the scratch is polished for 5 microns until the scratch is removed.
8. A polishing method for an integrated display screen using the polishing apparatus as set forth in any one of claims 1 to 3 and the polishing liquid as set forth in claim 6, characterized by comprising the steps of:
i, fixing a display screen on a working table top (2);
II, intelligently detecting and setting the position and the screen surface height of the display screen by using a three-coordinate measuring head (9), and intelligently detecting and setting the position or the polishing area of the scratch on the display screen by using the three-coordinate measuring head (9); the three-coordinate measuring head (9) is used for accurately detecting the height position of the display screen
III, setting the height of the polishing wheel, the moving speed of the polishing wheel and the expansion distance when the polishing wheel is polished to the edge, and sensing the inclination of the panel and the table top in the X direction and the Y direction through three points on the detection panel by using a three-coordinate measuring head (9), so that the compensation in the Z direction is carried out in the polishing process, and the height of the polishing wheel from the workpiece is consistent when the polishing wheel is at any point on the polishing screen;
IV, starting the polishing device, and slowly lifting the polishing wheel when the edge of the scratch is polished; and when entering the scratch, the polishing wheel slowly descends to obtain smooth transition and improve the polishing quality, the ferromagnetic polishing solution polishes according to set parameters to remove the scratch on the display screen, and the scratch is polished for 5 microns along the scratch every time, and then whether the scratch still exists or not is checked, and if the scratch still exists, the scratch is polished for 5 microns until the scratch is removed.
9. A polishing method for an integrated display screen using the polishing apparatus as set forth in any one of claims 1 to 4 and the polishing liquid as set forth in claim 5, characterized by comprising the steps of:
i, fixing a display screen on a working table top (2);
II, intelligently detecting and setting the height of a screen surface of the display screen by using a three-coordinate measuring head (9), and quickly measuring and setting the position of the display screen and the position of the scratch by using a CCD (charge coupled device) forming device (10);
III, setting the height of the polishing wheel, the moving speed of the polishing wheel and the expansion distance when the polishing wheel is polished to the edge, and sensing the inclination of the screen surface and the table board in the X direction and the Y direction through three points on a detection screen surface by using a three-coordinate measuring head (9) so as to compensate in the Z direction in the polishing process and enable the height of the polishing wheel from a workpiece to be consistent when any point on the polishing screen is polished;
IV, starting the polishing device, and slowly lifting the polishing wheel when the scratch edge is polished; and when entering the scratch, the polishing wheel slowly descends to obtain smooth transition and improve the polishing quality, the ferromagnetic polishing solution polishes according to set parameters to remove the scratch on the display screen, and the scratch is polished for 5 microns along the scratch every time, and then whether the scratch still exists or not is checked, and if the scratch still exists, the scratch is polished for 5 microns until the scratch is removed.
10. Use of the polishing method for integrated display screens according to claim 9 for direct polishing of display screens of finished products such as tablet computers.
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| CN202210412864.9A CN114750054A (en) | 2022-04-19 | 2022-04-19 | Polishing device and polishing method for integrated display screen |
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