CN111215301A - Method for spraying friction material of rotor of piezoelectric actuator and spraying tool - Google Patents
Method for spraying friction material of rotor of piezoelectric actuator and spraying tool Download PDFInfo
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- CN111215301A CN111215301A CN202010093888.3A CN202010093888A CN111215301A CN 111215301 A CN111215301 A CN 111215301A CN 202010093888 A CN202010093888 A CN 202010093888A CN 111215301 A CN111215301 A CN 111215301A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2506/00—Halogenated polymers
- B05D2506/10—Fluorinated polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
- B05D2601/28—Metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/085—Copper
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Life Sciences & Earth Sciences (AREA)
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- Wood Science & Technology (AREA)
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- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention provides a method and a spraying tool for spraying a friction material of a rotor of a piezoelectric actuator, wherein the method comprises the following steps: starting a pneumatic spray gun, and placing a friction material in the pneumatic spray gun; fixing the rotor by using a tool; spraying the rotor, taking down the cover plate after spraying, and standing for 6 hours; placing the rotor sprayed with the friction material into a four-flow welding curing furnace for curing for half an hour, and taking out; and polishing the surface of the rotor sprayed with the friction material to obtain the rotor with the friction layer of 0.01-0.05 mm in thickness. The spraying tool comprises a base and a rotor, wherein a concave platform matched with the rotor is arranged on the base, the rotor is buckled in the concave platform through a cover plate, and the diameter of the cover plate is smaller than that of the rotor. By using the spraying method, the friction material is directly sprayed on the surface of the rotor to form a friction layer, and the spraying method has the advantages of labor cost saving, high working efficiency and spraying uniformity.
Description
Technical Field
The invention relates to the technical field of piezoelectric actuator rotors, in particular to a method and a spraying tool for spraying a friction material of a piezoelectric actuator rotor.
Background
The piezoelectric actuator is a device which converts a voltage signal into strain through a piezoelectric element so as to form a driving force. The transmission component of the piezoelectric actuator comprises a rotor and a stator, and the rotor generates displacement, and the end face of the rotor is in contact with the stator to drive the stator.
In the production and manufacture, a friction layer made of friction material is coated on the outer ring of the end face of the rotor close to the stator so as to realize the contact drive of the stator, and in the prior art, the friction cutting is generally prepared, sliced and then bonded so that the friction layer is directly adhered to the end face of the rotor, and the method generally has the following problems: firstly, in the long-term use process, the friction layer is abraded quickly, and the friction layer is not firmly adhered, so that the risk of falling off is caused; secondly, the cutting and pasting are divided into two steps, so that the labor force output is increased; thirdly, the slicing precision is low, is unfavorable for high-efficient, quick work of pasting, influences efficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a spraying tool for spraying a friction material of a rotor of a piezoelectric actuator, and the friction material is directly sprayed on the surface of the rotor to form a friction layer by using the spraying method, so that the spraying tool has the advantages of labor cost saving, high working efficiency and spraying uniformity; in addition, the friction layer is directly covered on the surface of the rotor, so that the wear resistance of the friction layer can be effectively improved, and the friction layer is prevented from falling off.
The technical scheme of the invention is as follows:
a method for spraying a friction material for a rotor of a piezoelectric actuator, comprising the steps of:
(1) starting a pneumatic spray gun, and placing a friction material in the pneumatic spray gun for standby; an automatic stirring pneumatic spray gun is used for preventing the static placement from generating precipitation;
(2) fixing the rotor by using a tool;
(3) spraying the rotor, taking down the cover plate after spraying, and standing for 6 hours;
(4) placing the rotor sprayed with the friction material into a four-flow welding curing furnace for curing for half an hour, wherein the curing temperature is 200-300 ℃, and taking out to realize batch curing of the production line;
(5) polishing the surface of the rotor sprayed with the friction material in the step (4) to obtain a rotor with a friction layer of 0.01-0.05 mm in thickness; the step can make the thickness of the friction layer on the surface of the rotor uniform and improve the stability of the rotor in the using process.
In the method for spraying the friction material of the rotor of the piezoelectric actuator, the friction material is prepared from the following raw materials in percentage by mass:
40% of Teflon coating, 7-12% of polyphenyl ester, 2-10% of carbon nano tube, 10-20% of alumina ceramic, 6-10% of glass fiber, 5-15% of graphite powder, 3-10% of copper powder and 2-12% of polyether ether ketone powder.
Preferably, the friction material is prepared from the following raw materials in percentage by mass:
40% of Teflon coating, 10% of polyphenyl ester, 6% of carbon nano tube, 15% of alumina ceramic, 6% of glass fiber, 10% of graphite powder, 5% of copper powder and 8% of polyether ether ketone powder.
Further, the preparation process of the friction material comprises the following steps: adding Teflon coating into a dispersion machine, then adding polyphenyl ester, carbon nano tubes, alumina ceramics, glass fibers, graphite powder, copper powder and polyether ether ketone powder for dispersion and stirring, wherein the dispersion speed is from initial 4000r/m to high speed 8000r/m, and the dispersion speed is increased by 1000r/m for one gear, and each gear is dispersed for 5 minutes; and then, the dispersion speed is reduced by one step when the dispersion speed is reduced by 1000r/m, and the friction material is obtained after the dispersion is finished.
A spraying tool used for the spraying method comprises a base and a rotor, wherein a concave platform matched with the rotor is formed in the base, the rotor is buckled in the concave platform through a cover plate, and the diameter of the cover plate is smaller than that of the rotor. The rotor is buckled in the concave table through the cover plate, and the friction layer is sprayed on the outer ring of the upper surface of the rotor through automatic spraying, so that batch spraying is realized, the friction layer is fixed and firm, the spraying is convenient, the spraying efficiency is high, the labor is saved, and the production and use cost is reduced.
Further, the thickness of the rotor is larger than the depth of the concave platform. When spraying, friction material can also be sprayed on the cambered surface part of the rotor higher than the concave table, so that the protection of the rotor in use is greatly increased, and the rotor can be guaranteed to be more easily disassembled in the groove.
Furthermore, a vertical stud is fixedly installed in the center of the concave table, a cover cap is fixedly installed in the middle of the cover plate, and a screw hole matched with the stud is formed in the bottom of the cover cap. Simple structure, the straining of rotor is firm, and easy dismounting is swift, and the practicality is strong.
Further, the cap is in a hexagonal prism shape. The wrench is convenient to use and the like to screw and disassemble, and the universality is good.
Furthermore, the lower side of the cover plate and the bottom of the concave platform are both covered with elastic layers. The base and the cover plate are prevented from scratching and crushing the rotor in the dismounting process, the quality of a sprayed friction layer of the rotor is ensured, and the safety is good.
Further, the cover plate is circular. The spraying friction layer is circular, the stress is uniform, and the service performance is stable.
Compared with the prior art, the invention has the beneficial effects that:
1. the batch spraying process of the rotor friction layer is realized, the spraying is uniform, the spraying is firm and firm, and the service performance is stable.
2. Simple structure, it is convenient to use, improves frictional layer spraying efficiency greatly, saves the labour, reduces production use cost.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a dynamometer plot for group 1.
Fig. 2 is a dynamometer graph for group 2.
Fig. 3 is a dynamometer graph for group 4.
Fig. 4 is a dynamometer graph for group 5.
Fig. 5 is a dynamometer graph for group 6.
Fig. 6 is a schematic structural view of the spraying tool.
Fig. 7 is a schematic view of an installation structure of the spraying tool.
Fig. 8 is a schematic view of a base structure of the spray tool.
Fig. 9 is a schematic view of the rotor structure after spraying.
In the drawings: 1. the device comprises a base, 2, a concave table, 3, a stud, 4, a rotor, 5, a cover plate, 6, a cover cap, 7, a friction layer, 8 and a rotor mounting hole.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The friction materials used in the method for spraying the friction material of the rotor of the piezoelectric actuator are respectively prepared by adopting the raw materials with the mass percentage provided in the table 1, the test is set to be 6 groups, and the friction materials are prepared by referring to the following table:
TABLE 1 composition of friction materials
Among the raw materials, the Teflon coating is produced by Dongguan fluorine chemical technology Co., Ltd, the product number is 421-119, and the high temperature resistant range is 250-800 ℃; the granularity of the polyphenyl ester is 25-35 mu m, the granularity of the carbon nano tube is 10-15 nm, the granularity of the alumina ceramic is 25-35 nm, the granularity of the glass fiber is 15-20 mu m, the granularity of the graphite powder is 17-21 mu m, the granularity of the copper powder is 15-30 mu m, and the granularity of the polyether ether ketone powder is 30-60 mu m.
Taking the preparation process of the friction material of group 4 as an example, the preparation process of the friction material is explained as follows: adding a Teflon coating into a dispersion machine, and fully stirring by using a high-speed dispersion machine with the rotating speed of 4000r/min to enable the coating to be in a suspension state; then adding copper powder, and fully stirring by using a high-speed dispersion machine with the rotating speed of 4000r/min to enable the coating to be in a suspension state; then adding glass fiber, and fully stirring by using a high-speed dispersion machine with the rotating speed of 4000r/min to enable the coating to be in a suspension state; then adding carbon nano tubes, and fully stirring by using a high-speed dispersion machine with the rotating speed of 4000r/min to enable the coating to be in a suspension state; then adding polyether ether ketone powder, and fully stirring by using a high-speed dispersion machine with the rotating speed of 4000r/min to enable the coating to be in a suspension state; then adding graphite powder, and fully stirring by using a high-speed dispersion machine with the rotating speed of 4000r/min to enable the coating to be in a suspension state; then adding polyphenyl ester, and fully stirring by using a high-speed dispersion machine with the rotating speed of 4000r/min to enable the coating to be in a suspension state; then adding alumina ceramics, wherein the dispersion speed is from initial 4000r/m to high speed 8000r/m, and the dispersion speed is increased by 1000r/m to be a first gear, and each gear is dispersed for 5 minutes; and then, the dispersion speed is reduced by one step when the dispersion speed is reduced by 1000r/m, and the friction material is obtained after the dispersion is finished.
In the preparation method, except that the Teflon coating is added firstly, the addition sequence of the other raw materials is slowly added according to the principle of adding a little of the Teflon coating firstly and then adding a large amount of the Teflon coating secondly.
The friction materials of groups 1 to 6 were sprayed on the rotor surface and tested, see table 2,
TABLE 2 results of friction layer test obtained from groups 1 to 6
Example 2
The prior art rotor structure is shown in fig. 9, and a square rotor mounting hole 8 is formed in the middle of the rotor 4.
As shown in fig. 6, 7 and 8, a spraying tool for the spraying method includes a base 1 and a rotor 4, the base 1 is provided with a concave platform 2 matched with the rotor 4, the rotor 4 is buckled in the concave platform 2 through a circular cover plate 5, the diameter of the cover plate 5 is smaller than that of the rotor 4, and the thickness of the rotor 4 is larger than the depth of the concave platform 2.
The center of the concave station 2 is fixedly provided with a vertical stud 3, the middle part of the cover plate 5 is fixedly provided with a cover cap 6 in a hexagonal prism shape, and the bottom of the cover cap 6 is provided with a screw hole matched with the stud 3.
The lower side of the cover plate 5 and the bottom of the concave platform 2 are both covered with elastic layers. The base 1 and the cover plate 5 are prevented from scratching and crushing the rotor 4 in the dismounting process, the quality of the sprayed friction layer 7 of the rotor 4 is ensured, and the safety is good.
When the piezoelectric actuator rotor friction layer spraying tool is used, (1) a pneumatic spray gun with an automatic stirring function is started, and a friction material is placed in the pneumatic spray gun for standby; (2) the rotor is installed and fixed by using a tool, the rotor 4 is placed in a plurality of concave stations 2 on the base 1, the studs 3 penetrate through rotor installation holes 8, the concave stations 2 are matched with the outer ring of the rotor 4, the upper surface of the rotor 4 is higher than the upper edge of the concave stations 2, the studs 3 are screwed with threaded holes in the cap 6, the rotor 4 is pressed and fixed on the base plate 1 by the circular cover plate 6, the inner ring of the upper surface of the rotor 4 is pressed by the cover plate 6, and the circular outer ring is reserved as a spraying space; (3) spraying the rotor, taking down the cover plate 5 after spraying, and standing for 6 hours; (4) placing the rotor 4 sprayed with the friction material into a four-flow welding curing furnace for curing for half an hour at the curing temperature of 260 ℃, and taking out to realize batch curing of the production line; (5) polishing the surface of the rotor 4 sprayed with the friction material in the step (4) to obtain a finished product; the friction material is sprayed by surface polishing to make the surface flat and uniform, and a friction layer 7 as shown in fig. 9 is formed.
This piezoelectric actuator rotor friction layer spraying frock can realize the batch spraying technology of rotor friction layer, and the spraying is even, and the spraying is durable firm, and the spraying quality is high, and performance is stable, and frock simple structure uses conveniently, can improve the spraying efficiency of friction layer greatly, saves the operation labour, reduces production use cost, and this frock can used repeatedly.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "upper", "lower", "outside", "inside" and the like in the description and claims of this application and the above drawings are used for distinguishing relative positions if any, and do not necessarily have to be given qualitative meanings. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Claims (10)
1. A method for spraying a friction material for a rotor of a piezoelectric actuator, comprising the steps of:
(1) starting a pneumatic spray gun, and placing a friction material in the pneumatic spray gun for standby;
(2) fixing the rotor by using a tool;
(3) spraying the rotor, taking down the cover plate after spraying, and standing for 6 hours;
(4) placing the rotor sprayed with the friction material into a four-flow welding curing furnace for curing for half an hour, wherein the curing temperature is 200-300 ℃, and taking out;
(5) and (4) polishing the surface of the rotor sprayed with the friction material in the step (4) to obtain the rotor with the friction layer thickness of 0.01-0.05 mm.
2. A method for piezoelectric actuator rotor friction material spraying as in claim 1 wherein the friction material used in the method is made from the following raw materials in mass percent:
40% of Teflon coating, 7-12% of polyphenyl ester, 2-10% of carbon nano tube, 10-20% of alumina ceramic, 6-10% of glass fiber, 5-15% of graphite powder, 3-10% of copper powder and 2-12% of polyether ether ketone powder.
3. A method for piezoelectric actuator rotor friction material spraying as described in claim 2 wherein the friction material is made from the following raw materials by mass percent:
40% of Teflon coating, 10% of polyphenyl ester, 6% of carbon nano tube, 15% of alumina ceramic, 6% of glass fiber, 10% of graphite powder, 5% of copper powder and 8% of polyether ether ketone powder.
4. A method for piezoelectric actuator rotor friction material spraying as described in claim 3 wherein said friction material is prepared by: adding Teflon coating into a dispersion machine, then adding polyphenyl ester, carbon nano tubes, alumina ceramics, glass fibers, graphite powder, copper powder and polyether ether ketone powder for dispersion and stirring, wherein the dispersion speed is from initial 4000r/m to high speed 8000r/m, and the dispersion speed is increased by 1000r/m for one gear, and each gear is dispersed for 5 minutes; and then, the dispersion speed is reduced by one step when the dispersion speed is reduced by 1000r/m, and the friction material is obtained after the dispersion is finished.
5. A spraying tool used in the spraying method of any one of claims 1 to 4, comprising a base and a rotor, wherein the base is provided with a concave platform matched with the rotor, the rotor is buckled in the concave platform through a cover plate, and the diameter of the cover plate is smaller than that of the rotor.
6. The spray coating tool of claim 5 wherein the thickness of said rotor is greater than the depth of the recess.
7. The spraying tool set forth in claim 6, wherein a vertical stud is fixedly mounted in the center of the concave, a cap is fixedly mounted in the middle of the cover plate, and a screw hole matched with the stud is formed in the bottom of the cap.
8. The spray coating tool of claim 7 wherein said cap is in the shape of a hexagonal prism.
9. The spray coating tool of claim 8 wherein the underside of said cover plate and the bottom of said recessed station are coated with a resilient layer.
10. The spray coating tool of claim 9 wherein said cover plate is circular.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093888.3A CN111215301A (en) | 2020-02-14 | 2020-02-14 | Method for spraying friction material of rotor of piezoelectric actuator and spraying tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010093888.3A CN111215301A (en) | 2020-02-14 | 2020-02-14 | Method for spraying friction material of rotor of piezoelectric actuator and spraying tool |
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