CN116043179A - Screw rod surface nano coating preparation method and screw rod clamping fixture - Google Patents

Screw rod surface nano coating preparation method and screw rod clamping fixture Download PDF

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Publication number
CN116043179A
CN116043179A CN202111266549.1A CN202111266549A CN116043179A CN 116043179 A CN116043179 A CN 116043179A CN 202111266549 A CN202111266549 A CN 202111266549A CN 116043179 A CN116043179 A CN 116043179A
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CN
China
Prior art keywords
screw
coating
rod
screw rod
cleaning
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Pending
Application number
CN202111266549.1A
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Chinese (zh)
Inventor
李子亮
林欣毅
余京京
井炳
陈荣发
赵毅红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Hanbell Precise Machinery Co ltd
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Shanghai Hanbell Precise Machinery Co ltd
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Priority to CN202111266549.1A priority Critical patent/CN116043179A/en
Publication of CN116043179A publication Critical patent/CN116043179A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/50—Substrate holders
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/02—Pretreatment of the material to be coated
    • C23C14/021—Cleaning or etching treatments
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/02—Pretreatment of the material to be coated
    • C23C14/021—Cleaning or etching treatments
    • C23C14/022—Cleaning or etching treatments by means of bombardment with energetic particles or radiation
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/02—Pretreatment of the material to be coated
    • C23C14/028—Physical treatment to alter the texture of the substrate surface, e.g. grinding, polishing
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/0641—Nitrides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/24—Vacuum evaporation
    • C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

The invention discloses a preparation method of a nano coating on the surface of a screw rod and a screw rod clamping fixture, wherein the preparation method sequentially comprises a reticulate pattern surface hardening treatment step, a pretreatment step and an ion coating step; wherein the reticulate pattern surface hardening treatment comprises the step of carrying out reticulate pattern rolling on the rotor contact surface of the screw by adopting a numerical control processing lathe and a reticulate pattern rolling cutter. The screw machining clamp comprises a main shaft, an upper supporting disc, an upper supporting rod, a lower supporting disc and a lower supporting rod. According to the preparation method of the nano coating on the surface of the screw rod, the contact surface of the screw rod is processed by reticulate pattern rolling, so that the water hammer phenomenon of the screw rod in the high-speed rotation process can be effectively relieved, the service life of the coating is effectively prolonged, meanwhile, environmental pollution in the processing process can be reduced through the nano coating, and the durability of the screw rod is improved. The screw clamping fixture can effectively fix the screw to fully coat the film in the negative ion film coating equipment.

Description

Screw rod surface nano coating preparation method and screw rod clamping fixture
Technical Field
The invention relates to a preparation method and a special fixture, in particular to a preparation method of a nano coating on the surface of a screw rod and a screw rod clamping fixture.
Background
The AlCrN coating is used as a multi-component nitride hard coating, has higher hardness and good wear resistance, and is widely applied to the surface protection of engineering structural parts. However, no ion plating method is used for depositing a coating on the surface of a metal material.
Disclosure of Invention
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The preparation method of the nano coating on the surface of the screw rod is characterized by comprising the following steps in sequence: a reticulate pattern surface hardening treatment step, a pretreatment step and an ion plating step; wherein the reticulate pattern surface hardening treatment comprises the step of carrying out reticulate pattern rolling on the rotor contact surface of the screw by adopting a numerical control processing lathe and a reticulate pattern rolling cutter.
Preferably, the preprocessing step includes:
s1, clamping a screw to be polished in a screw clamping fixture, wherein the central axis of the screw is coincident with the rotating shaft of the clamping fixture;
s2, starting a sand blasting machine, and polishing the surface of the screw for more than or equal to 30 minutes;
s3, taking the screw rod off the screw rod clamping fixture, placing the screw rod in a first cleaning tank, and carrying out oil removal treatment on the surface of the screw rod by adopting a first alkaline cleaning liquid and a surfactant, wherein the preheating temperature of the first alkaline cleaning liquid and the surfactant during cleaning is 80-95 ℃;
s4, placing the screw in a second cleaning tank, and rinsing with industrial deionized water to remove the first alkaline cleaning solution remained in the S3;
s5, placing the screw in a third cleaning tank, and adopting an acidic cleaning solution and a surfactant to remove rust on the surface of the screw;
s6, placing the screw in a fourth cleaning tank, and removing the acid cleaning liquid on the surface of the screw in the S5 by adopting industrial deionized water;
s7, placing the screw in a fifth cleaning tank, adopting a second alkaline cleaning solution and a surfactant to treat the screw oxide, and neutralizing the acidic cleaning solution in S6 remained on the surface of the screw;
s8, placing the screw in a sixth cleaning tank, and fully cleaning the screw by using industrial deionized water to remove residual liquid on the surface of the screw;
s9, placing the screw in a seventh cleaning tank, and cleaning the surface of the screw by using industrial deionized water again;
s10, taking out the screw from the seventh cleaning tank, and placing the screw in an oven for drying;
s11, performing defect inspection on the surface of the screw.
Preferably, the ion plating is performed after the step S11, and the ion plating step includes:
s12, clamping the dried screw rod on the screw rod processing clamp in the vacuum chamber again, and vacuumizing the vacuum chamber until the background vacuum degree reaches 10E-3Pa;
s13, starting anion coating equipment to apply-300V bias, and heating the vacuum chamber to 350 ℃;
s14, filling argon into the vacuum chamber, and performing ion glow etching cleaning when the vacuum degree reaches 10E-1 Pa;
s15, filling nitrogen into the vacuum chamber, wherein the vacuum degree reaches 5Pa;
s16, setting reactive ion plating current 120A and voltage 360V through the negative ion plating equipment, and depositing for 45 minutes;
and S17, after coating is completed, closing the negative ion coating equipment until the room temperature in the vacuum chamber is cooled to be lower than 100 ℃, opening the vacuum chamber, and taking out the workpiece.
Preferably, the first alkaline cleaner in step S3 includes 10% sodium silicate and 15% sodium tripolyphosphate.
Preferably, the resistivity of the industrial deionized water in steps S4, S6, S8 and S9 is 5mΩ·cm.
Preferably, the acidic cleaning agent in step S5 includes 10% diluted hydrochloric acid.
Preferably, the second alkaline cleaning solution in step S7 includes 5% sodium hydroxide.
Preferably, the surfactant in steps S3, S5, S7 comprises 10% fatty alcohol polyvinyl ether.
The invention also provides a screw clamping fixture which is characterized by comprising a main shaft extending along the vertical direction, wherein the lower end of the main shaft is provided with a lower supporting disc, and the upper end of the main shaft is provided with an upper supporting disc; an upper supporting rod is vertically arranged on the upper supporting plate, and the top end of the upper supporting rod penetrates through the upper supporting plate and is locked on the upper supporting plate through a pair of upper fixing nuts; the lower support plate is vertically provided with a lower support rod, and the bottom end of the lower support rod penetrates through the lower support plate and is fixed on the lower support plate; the bottom of the upper supporting rod and the top of the lower supporting rod are oppositely arranged and coincide with the central axis of the clamped screw rod.
Preferably, an upper adjusting nut is fixedly arranged on the upper supporting rod, and a lower adjusting nut is fixedly arranged on the lower supporting rod.
Preferably, the bottom of the lower support rod is provided with external threads, and the lower support disc is in threaded connection with the lower support rod.
Preferably, the lower support rod is provided with a lower fixing nut, and the lower fixing nut is fixed on the lower support disc.
The reagents and materials used in the present invention are commercially available.
In the present invention, the above-mentioned preferred conditions can be arbitrarily combined on the basis of conforming to the common knowledge in the art, and thus, each preferred embodiment of the present invention is obtained.
The invention has the positive progress effects that: according to the preparation method of the nano coating on the surface of the screw rod, the contact surface of the screw rod is processed by reticulate pattern rolling, so that the water hammer phenomenon of the screw rod in the high-speed rotation process can be effectively relieved, the service life of the coating is effectively prolonged, meanwhile, environmental pollution in the processing process can be reduced through the nano coating, and the durability of the screw rod is improved. The screw clamping fixture can effectively fix the screw to fully coat the film in the negative ion film coating equipment.
Drawings
Fig. 1 is a schematic structural view of a screw clamping fixture according to a preferred embodiment of the present invention.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention. The experimental methods in the following examples, in which specific conditions are not specified, were selected according to conventional methods and conditions or according to the commercial specifications, and the following proportions are mass ratios.
The embodiment discloses a processing method of a screw surface nano coating, which sequentially comprises a reticulate pattern surface hardening treatment step, a pretreatment step and an ion coating step. Wherein the reticulate pattern surface hardening treatment comprises the step of carrying out reticulate pattern rolling on the rotor contact surface of the screw by adopting a numerical control processing lathe and a reticulate pattern rolling cutter. The pretreatment step comprises the following steps:
s1, clamping a screw to be polished in a special screw machining clamp, wherein the central axis of the screw is overlapped with a rotating shaft clamped by the machining clamp;
s2, starting a sand blasting machine, and polishing the surface of the screw for more than or equal to 30 minutes;
s3, taking the screw rod off the screw rod clamping fixture, placing the screw rod in a first cleaning tank, and carrying out oil removal treatment on the surface of the screw rod by adopting a first alkaline cleaning liquid and a surfactant, wherein the preheating temperature of the first alkaline cleaning liquid and the surfactant during cleaning is 80-95 ℃; the first alkaline cleaning agent comprises 10% of sodium silicate, 15% of sodium tripolyphosphate and a surfactant, wherein the surfactant comprises 10% of fatty alcohol polyoxyethylene ether.
S4, placing the screw in a second cleaning tank, and rinsing with industrial deionized water to remove the first alkaline cleaning solution remained in the S3; the resistivity of the industrial deionized water is 5MΩ.cm.
S5, placing the screw in a third cleaning tank, and adopting an acidic cleaning solution to remove rust on the surface of the screw; the acidic cleaning agent comprises 10% of diluted hydrochloric acid and a surfactant, wherein the surfactant comprises 10% of fatty alcohol polyoxyethylene ether.
S6, placing the screw in a fourth cleaning tank, and removing the acid cleaning liquid on the surface of the screw in the S5 by adopting industrial deionized water; the resistivity of the industrial deionized water is 5MΩ.cm.
S7, placing the screw in a fifth cleaning tank, adopting a second alkaline cleaning solution and a surfactant to treat the screw oxide, and neutralizing the acidic cleaning solution in S6 remained on the surface of the screw; the second alkaline cleaning liquid comprises 5% of sodium hydroxide, and the surfactant comprises 10% of fatty alcohol polyoxyethylene ether.
S8, placing the screw in a sixth cleaning tank, and fully cleaning the screw by using industrial deionized water to remove residual liquid on the surface of the screw; the resistivity of the industrial deionized water is 5MΩ.cm.
S9, placing the screw in a seventh cleaning tank, and cleaning the surface of the screw by using industrial deionized water again; the resistivity of the industrial deionized water is 5MΩ.cm.
S10, taking out the screw from the seventh cleaning tank, and placing the screw in an oven for drying;
s11, performing defect inspection on the surface of the screw.
Preferably, the ion plating step includes:
s12, clamping the dried screw rod on the screw rod processing clamp in the vacuum chamber again, and vacuumizing the vacuum chamber until the background vacuum degree reaches 10E-3Pa;
s13, starting anion coating equipment to apply-300V bias, and heating the vacuum chamber to 350 ℃;
s14, filling argon into the vacuum chamber, and performing ion glow etching cleaning when the vacuum degree reaches 10E-1 Pa;
s15, filling nitrogen into the vacuum chamber, wherein the vacuum degree reaches 5Pa;
s16, setting reactive ion plating current 120A and voltage 360V through the negative ion plating equipment, and depositing for 45 minutes;
and S17, after coating is completed, closing the negative ion coating equipment until the room temperature in the vacuum chamber is cooled to be lower than 100 ℃, opening the vacuum chamber, and taking out the workpiece.
As shown in fig. 1, the invention also provides a screw clamping fixture, which comprises a main shaft 11 extending along the vertical direction, wherein the lower end of the main shaft 11 is provided with a lower supporting disc 9, and the upper end of the main shaft 11 is provided with an upper supporting disc 2; an upper supporting rod 5 is vertically arranged on the upper supporting plate 2, and the top end of the upper supporting rod 5 penetrates through the upper supporting plate 2 and is locked on the upper supporting plate 2 through a pair of upper fixing nuts 1 and 3. The lower support plate 9 is vertically provided with a lower support rod 7, and the bottom end of the lower support rod 7 passes through the lower support plate 9 and is in threaded connection with the lower support plate 9 through external threads at the bottom end of the lower support rod 7. Of course, in other embodiments, the lower support rod may be fixed to the lower support plate by providing a lower fixing nut. The bottom end of the upper supporting rod 5 and the top end of the lower supporting rod 7 are arranged oppositely and coincide with the central axis of the clamped screw rod 6. The main shaft 11 is connected with the lower support disc 9 and the upper support disc 2 by adopting a bearing 10.
Preferably, the upper supporting rod 5 is fixedly provided with an upper adjusting nut 4, and the lower supporting rod 7 is fixedly provided with a lower adjusting nut 8. The upper supporting rod 5 and the lower supporting rod 7 are mutually close to or far away from each other by adjusting the corresponding upper adjusting nut 4 or lower adjusting nut 8, so as to achieve the aim of clamping or loosening the screw rod 6.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (12)

1. The preparation method of the nano coating on the surface of the screw is characterized by sequentially comprising the following steps: a reticulate pattern surface hardening treatment step, a pretreatment step and an ion plating step; wherein the reticulate pattern surface hardening treatment comprises the step of carrying out reticulate pattern rolling on the rotor contact surface of the screw by adopting a numerical control processing lathe and a reticulate pattern rolling cutter.
2. The method for preparing a nano-coating on a surface of a screw according to claim 1, wherein the pretreatment step comprises:
s1, clamping a screw to be polished in a screw clamping fixture, wherein the central axis of the screw is coincident with the rotating shaft of the screw clamping fixture;
s2, starting a sand blasting machine, and polishing the surface of the screw for more than or equal to 30 minutes;
s3, taking the screw rod off the screw rod clamping fixture, placing the screw rod in a first cleaning tank, and carrying out oil removal treatment on the surface of the screw rod by adopting a first alkaline cleaning liquid and a surfactant, wherein the preheating temperature of the first alkaline cleaning liquid and the surfactant during cleaning is 80-95 ℃;
s4, placing the screw in a second cleaning tank, and rinsing with industrial deionized water to remove the first alkaline cleaning solution remained in the S3;
s5, placing the screw in a third cleaning tank, and adopting an acidic cleaning solution and a surfactant to remove rust on the surface of the screw;
s6, placing the screw in a fourth cleaning tank, and removing the acid cleaning liquid on the surface of the screw in the S5 by adopting industrial deionized water;
s7, placing the screw in a fifth cleaning tank, adopting a second alkaline cleaning solution and a surfactant to treat the screw oxide, and neutralizing the acidic cleaning solution in S6 remained on the surface of the screw;
s8, placing the screw in a sixth cleaning tank, and fully cleaning the screw by using industrial deionized water to remove residual liquid on the surface of the screw;
s9, placing the screw in a seventh cleaning tank, and cleaning the surface of the screw by using industrial deionized water again;
s10, taking out the screw from the seventh cleaning tank, and placing the screw in an oven for drying;
s11, performing defect inspection on the surface of the screw.
3. The method for processing a nano-coating on a surface of a screw according to claim 2, wherein the ion plating step is performed after the step S11, and comprises:
s12, re-clamping the dried screw on the screw clamping fixture in the vacuum chamber, and vacuumizing the vacuum chamber until the background vacuum degree reaches 10E-3Pa;
s13, starting anion coating equipment to apply-300V bias, and heating the vacuum chamber to 350 ℃;
s14, filling argon into the vacuum chamber, and performing ion glow etching cleaning when the vacuum degree reaches 10E-1 Pa;
s15, filling nitrogen into the vacuum chamber, wherein the vacuum degree reaches 5Pa;
s16, setting reactive ion plating current 120A and voltage 360V through the negative ion plating equipment, and depositing for 45 minutes;
and S17, after coating is completed, closing the negative ion coating equipment until the room temperature in the vacuum chamber is cooled to be lower than 100 ℃, opening the vacuum chamber, and taking out the workpiece.
4. The method for preparing a nano-coating on a surface of a screw according to claim 3, wherein the first alkaline cleaner in step S3 comprises 10% sodium silicate and 15% sodium tripolyphosphate.
5. The method for preparing a nano-coating on a surface of a screw according to claim 4, wherein the resistivity of the industrial deionized water in the steps S4, S6, S8 and S9 is 5mΩ.cm.
6. The method of preparing a nanocoating on a surface of a screw according to claim 5, wherein the acidic cleaning agent in step S5 comprises 10% diluted hydrochloric acid.
7. The method of claim 6, wherein the second alkaline cleaning solution in step S7 comprises 5% sodium hydroxide.
8. The method for preparing a nano-coating on a surface of a screw according to claim 7, wherein the surfactant in the steps S3, S5 and S7 comprises 10% of aliphatic alcohol polyvinyl ether.
9. The screw clamping fixture is characterized by comprising a main shaft extending along the vertical direction, wherein a lower supporting disc is arranged at the lower end of the main shaft, and an upper supporting disc is arranged at the upper end of the main shaft; an upper supporting rod is vertically arranged on the upper supporting plate, and the top end of the upper supporting rod penetrates through the upper supporting plate and is locked on the upper supporting plate through a pair of upper fixing nuts; the lower support plate is vertically provided with a lower support rod, and the bottom end of the lower support rod penetrates through the lower support plate and is fixed on the lower support plate; the bottom of the upper supporting rod and the top of the lower supporting rod are oppositely arranged and coincide with the central axis of the clamped screw rod.
10. The screw clamping fixture according to claim 9, wherein an upper adjusting nut is fixedly arranged on the upper supporting rod, and a lower adjusting nut is fixedly arranged on the lower supporting rod.
11. The screw clamping fixture according to claim 10, wherein the bottom of the lower support rod is provided with external threads, and the lower support plate is in threaded connection with the lower support rod.
12. The screw clamping jig of claim 10 wherein said lower support bar is provided with a lower retaining nut and is secured to said lower support plate by said lower retaining nut.
CN202111266549.1A 2021-10-28 2021-10-28 Screw rod surface nano coating preparation method and screw rod clamping fixture Pending CN116043179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111266549.1A CN116043179A (en) 2021-10-28 2021-10-28 Screw rod surface nano coating preparation method and screw rod clamping fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111266549.1A CN116043179A (en) 2021-10-28 2021-10-28 Screw rod surface nano coating preparation method and screw rod clamping fixture

Publications (1)

Publication Number Publication Date
CN116043179A true CN116043179A (en) 2023-05-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111266549.1A Pending CN116043179A (en) 2021-10-28 2021-10-28 Screw rod surface nano coating preparation method and screw rod clamping fixture

Country Status (1)

Country Link
CN (1) CN116043179A (en)

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