CN114134289A - Wear-resistant screw with nano ceramic coating - Google Patents
Wear-resistant screw with nano ceramic coating Download PDFInfo
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- CN114134289A CN114134289A CN202111208511.9A CN202111208511A CN114134289A CN 114134289 A CN114134289 A CN 114134289A CN 202111208511 A CN202111208511 A CN 202111208511A CN 114134289 A CN114134289 A CN 114134289A
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- 229910052751 metal Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000010285 flame spraying Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 229910009043 WC-Co Inorganic materials 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 238000010791 quenching Methods 0.000 claims description 4
- 230000000171 quenching effect Effects 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000005121 nitriding Methods 0.000 description 17
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- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 8
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- 229910000831 Steel Inorganic materials 0.000 description 4
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 239000000843 powder Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
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- 239000004677 Nylon Substances 0.000 description 1
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- 238000004458 analytical method Methods 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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Classifications
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H2025/249—Special materials or coatings for screws or nuts
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a wear-resistant screw with a nano ceramic coating, which comprises a screw rod part and a handle part, wherein the handle part is positioned on the right side of the screw rod part, the screw rod part is sequentially provided with a first screw thread section, a second screw thread section, a third screw thread section and a fourth screw thread section from right to left, and the outer surface of the screw rod part is provided with the nano ceramic coating; the screw rod structure is reasonable in design, the service life of the screw rod is greatly prolonged, the screw rod can continuously work for a long time, the production cost is reduced, the working efficiency is improved, and the defects of the prior art are overcome.
Description
Technical Field
The invention relates to the technical field of screws, in particular to a wear-resistant screw with a nano ceramic coating.
Background
As a core part of industrial machinery, the screw rod always works in high-temperature, strong abrasion, large torque and possible corrosive environment, and most screw rods in China adopt a nitriding or double-alloy process.
The nitriding process generally uses 38CrMuAl (commonly called nitriding steel), the nitriding process is hardened by gas nitriding heat treatment for 72 hours, the nitriding process is suitable for processing common plastic molding, the strength limit is about 45-60kgf/mm2, the core strength is enough only when the nitriding steel is used as a screw, but the wear resistance of the screw and a cylinder made of the nitriding steel is large due to the improvement of the screw rotating speed and the pressure requirement in the cylinder in recent years and more mainly as a result of the addition of a large amount of filler during extrusion, the depth of a nitriding layer is generally about 0.5mm, the hardness of an internal collective layer is only about HV280, once the nitriding layer is ground, the wear resistance is poor, the nitriding layer becomes brittle due to the improper nitriding process during nitriding, the nitriding layer is easy to peel off under high pressure, the wear resistance of the screw is damaged, and the stable operation of the screw is also damaged due to the fact that the collective hardness is too low, the thin nitriding layer is crushed under high pressure, in addition, the corrosion resistance of nitrided steels is enhanced by nitriding, but in general, corrosion resistance is insufficient, especially when extruding hard polyvinyl chloride and some engineering plastics.
The double alloy process is divided into two forms of casting and thermal spraying. The bimetal casting is that a special alloy material is melted on a base material after a forming groove is cut according to the requirements of users, the alloy material is uniformly covered on the base material by a special method, and different formulas are used for achieving the best effect according to the special requirements of the users, the alloy uniformly covered on the base material is completely seamless and has no hole and does not seep water, and then the alloy is ground to the required drawing size requirement after the stress is eliminated by integral quenching treatment; the thermal spraying is to weld a layer of wear-resistant and corrosion-resistant tungsten carbide (Wc/Co) nickel-based alloy (Ni + B/Cr) and self-fluxing alloy on the surface of the screw flight. The double-alloy process improves the corrosion resistance and the wear resistance of the screw rod, and is suitable for forming plastic nylon added with glass fiber, stone powder and the like.
Contemporary injection molding manufacturers add more and more mineral additives and glass fibers to injection molding compounds to improve material properties. These mixtures put higher demands on the wear and corrosion resistance of the screw, for example, under the working condition of adding 35% of glass fiber, the common screw can only be used for 1-3 months. The traditional double-alloy screw improves the performances of wear resistance, corrosion resistance and the like of a nitriding screw to a certain extent, and the hardness reaches HRC65 at most, but in actual production, due to the limitation of processes and materials, the problems of peeling, cracking or cracking, air holes and the like of a spray welding layer still exist, and the actual hardness generally only reaches about HRC 45. Therefore, it is necessary to find a nano-scale powder coating and a corresponding spraying process to eliminate the semi-molten state of the micro-scale powder coating in the spray welding process, so as to seek higher hardness and bonding strength, and better compactness becomes necessary. To this end, we propose a wear resistant screw with a nano ceramic coating.
Disclosure of Invention
The invention aims to provide a wear-resistant screw with a nano ceramic coating so as to overcome the technical problems in the prior art.
In order to achieve the technical purpose and achieve the technical effect, the invention provides the following technical scheme:
the utility model provides a wear-resisting screw rod with nano ceramic coating, includes screw rod portion and stalk portion, the stalk portion is located the right side of screw rod portion, screw rod portion has first thread section, second thread section, third thread section and fourth thread section from the right side left in proper order, the surface of screw rod portion is provided with nano ceramic coating.
Preferably, in the wear-resistant screw rod with the nano ceramic coating, a deep hole is formed in the center of the handle part, the left end of the deep hole extends into the fourth thread section, key grooves are symmetrically formed in the front and back of the right side of the outer wall of the handle part, and assembling threads are arranged on the left side of the outer part of the handle part.
Preferably, in the wear-resistant screw rod with the nano ceramic coating, the cylindrical core of the third thread section is a cone gradually enlarged from right to left, the outer side of the cylindrical core of the third thread section is convexly provided with main teeth and auxiliary teeth, and the main teeth and the auxiliary teeth are alternately arranged from right to left at intervals.
Preferably, in the wear-resistant screw rod with the nano ceramic coating, the nano ceramic coating is prepared by a nano WC metal ceramic coating through a supersonic flame spraying technology.
Preferably, in the wear-resistant screw with the nano ceramic coating, the thickness of the nano ceramic coating is 100-150 μm.
Preferably, in the wear-resistant screw with the nano ceramic coating, the total length L of the screw part and the handle is 1758mm, the length L1 of the screw part is 1420mm, and the length L2 of the handle is 338 mm.
A manufacturing method of a wear-resistant screw with a nano ceramic coating comprises the following steps:
s1, blanking the metal bar according to the given specification and length;
s2, roughly grinding the blanked metal bar until the positive tolerance of each part is 1mm according to the specification of the drawing;
s3, milling deep holes and key grooves on the roughly machined metal rod according to the requirements of a drawing to form a screw rough blank;
s4, carrying out vacuum quenching treatment on the screw rough blank, and then carrying out fine grinding and polishing until the size is required by a drawing;
s5, coating the outside of the screw with nano WC metal ceramic paint, and preparing a WC-Co coating by a supersonic flame spraying technology to obtain the wear-resistant screw with the nano ceramic coating.
Compared with the prior art, the invention has the beneficial effects that:
the screw rod has reasonable structural design, the double-thread part of the screw rod has a gradual-changing structure, different design requirements of different working environments are favorably met, and the structural strength of the screw rod is improved; through the setting of nanometer ceramic coating, prolonged the life of screw rod greatly for the screw rod can be long-time continuous work, has reduced manufacturing cost, has improved work efficiency, has improved prior art's defect.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a third thread segment according to the present invention;
FIG. 3 is a schematic cross-sectional view of a handle of the present invention.
In the figure: 1. a screw section; 2. a handle; 3. a nano-ceramic coating; 4. deep holes; 11. a first thread section; 12. a second thread section; 13. a third thread segment; 14. a fourth thread segment; 21. a keyway; 22. assembling threads; 131. a leading tooth; 132. and (4) auxiliary teeth.
Detailed Description
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 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 one
Referring to fig. 1-3, the present embodiment is a wear-resistant screw with a nano ceramic coating, including a screw portion 1 and a handle portion 2, the handle portion 2 is located at the right side of the screw portion 1, the screw portion 1 sequentially has a first thread section 11, a second thread section 12, a third thread section 13 and a fourth thread section 14 from right to left, and the outer surface of the screw portion 1 is provided with the nano ceramic coating 3.
A manufacturing method of a wear-resistant screw with a nano ceramic coating comprises the following steps:
s1, blanking the metal bar according to the given specification and length;
s2, roughly grinding the blanked metal bar until the positive tolerance of each part is 1mm according to the specification of the drawing;
s3, milling deep holes and key grooves on the roughly machined metal rod according to the requirements of a drawing to form a screw rough blank;
s4, carrying out vacuum quenching treatment on the screw rough blank, and then carrying out fine grinding and polishing until the size is required by a drawing;
s5, coating the outside of the screw with nano WC metal ceramic paint, and preparing a WC-Co coating by a supersonic flame spraying technology to obtain the wear-resistant screw with the nano ceramic coating.
Example two
On the basis of the first embodiment, the deep hole 4 is formed in the center of the handle part 2, the left end of the deep hole 4 extends into the fourth thread section 14, the key grooves 21 are symmetrically formed in the front and back of the right side of the outer wall of the handle part 2, and the assembling threads 22 are arranged on the left side of the outer part of the handle part 2, so that the screw rod can be conveniently installed on the transmission mechanism.
The column core of third thread section 13 is for the cone that gradually enlarges from right to left, and the column core outside of third thread section 13 is protruding to be equipped with main tooth 131 and vice tooth 132, and main tooth 131 and vice tooth 132 are from right to left interval alternative arrangement for two tooth parts of screw rod have the structure of gradual change formula, are favorable to satisfying different operational environment's different design demands, have improved the structural strength of screw rod.
The nano ceramic coating 3 is prepared from nano WC metal ceramic paint by a supersonic flame spraying technology, the formed WC-Co coating has the effects of wear resistance, acid and alkali corrosion resistance, high temperature resistance and cavitation resistance, and the supersonic spraying technology is adopted, so that the high binding force with a base material can be achieved by utilizing the control of process conditions. The thickness of the nano ceramic coating 3 is 100-150 mu m, so that the protective effect is good, the service life of the screw is greatly prolonged, the screw can continuously work for a long time, the production cost is reduced, the working efficiency is improved, and the defects of the prior art are overcome.
The total length L of the screw portion 1 and the shank portion 2 was 1758mm, the length L1 of the screw portion 1 was 1420mm, and the length L2 of the shank portion 2 was 338 mm. Specifically, in the present embodiment, the applicant has conducted elaborate research on the dimensional characteristics of the screw, and through repeated tests and analysis, the following reasonable dimensional parameter designs are obtained: the length of the first thread section 11 is 242.8mm, the length of the second thread section 12 is 382mm, and the length of the third thread section 13 is 504 mm.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A wear-resisting screw rod with nanometer ceramic coating, includes screw rod portion (1) and stalk portion (2), its characterized in that: shank (2) are located the right side of screw portion (1), screw portion (1) has first thread section (11), second thread section (12), third thread section (13) and fourth thread section (14) from the right side left in proper order, the surface of screw portion (1) is provided with nano ceramic coating (3).
2. The wear-resistant screw with the nano-ceramic coating as set forth in claim 1, wherein: the handle part (2) is provided with a deep hole (4) in the center, the left end of the deep hole (4) extends into the fourth screw thread section (14), the right side of the outer wall of the handle part (2) is symmetrically provided with key grooves (21) in the front and back direction, and the left side of the outer part of the handle part (2) is provided with assembling threads (22).
3. The wear-resistant screw with the nano-ceramic coating as set forth in claim 1, wherein: the column core of the third screw thread section (13) is a cone gradually enlarged from right to left, the outer side of the column core of the third screw thread section (13) is convexly provided with a main tooth (131) and an auxiliary tooth (132), and the main tooth (131) and the auxiliary tooth (132) are alternately arranged from right to left at intervals.
4. The wear-resistant screw with the nano-ceramic coating as set forth in claim 1, wherein: the nano ceramic coating (3) is prepared from a nano WC metal ceramic coating by a supersonic flame spraying technology.
5. The wear-resistant screw with the nano-ceramic coating as set forth in claim 1, wherein: the thickness of the nano ceramic coating (3) is 100-150 mu m.
6. The wear-resistant screw with the nano-ceramic coating as set forth in claim 1, wherein: the total length L of the screw part (1) and the handle part (2) is 1758mm, the length L1 of the screw part (1) is 1420mm, and the length L2 of the handle part (2) is 338 mm.
7. A manufacturing method of a wear-resistant screw with a nano ceramic coating is characterized by comprising the following steps: the method comprises the following steps:
s1, blanking the metal bar according to the given specification and length;
s2, roughly grinding the blanked metal bar until the positive tolerance of each part is 1mm according to the specification of the drawing;
s3, milling deep holes and key grooves on the roughly machined metal rod according to the requirements of a drawing to form a screw rough blank;
s4, carrying out vacuum quenching treatment on the screw rough blank, and then carrying out fine grinding and polishing until the size is required by a drawing;
s5, coating the outside of the screw with nano WC metal ceramic paint, and preparing a WC-Co coating by a supersonic flame spraying technology to obtain the wear-resistant screw with the nano ceramic coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208511.9A CN114134289A (en) | 2021-10-18 | 2021-10-18 | Wear-resistant screw with nano ceramic coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208511.9A CN114134289A (en) | 2021-10-18 | 2021-10-18 | Wear-resistant screw with nano ceramic coating |
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| CN114134289A true CN114134289A (en) | 2022-03-04 |
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| CN202111208511.9A Pending CN114134289A (en) | 2021-10-18 | 2021-10-18 | Wear-resistant screw with nano ceramic coating |
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2021
- 2021-10-18 CN CN202111208511.9A patent/CN114134289A/en active Pending
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| CN104404336A (en) * | 2014-10-30 | 2015-03-11 | 程敬卿 | WC-12Co nanometer coating |
| CN105256269A (en) * | 2015-11-11 | 2016-01-20 | 无锡清杨机械制造有限公司 | Spraying method |
| CN105349933A (en) * | 2015-11-11 | 2016-02-24 | 无锡清杨机械制造有限公司 | Preparation method of metal ceramic coating |
| CN106079362A (en) * | 2016-06-27 | 2016-11-09 | 天津镁制螺杆机电科技有限公司 | A kind of single screw mechanism used with stream guidance spiral groove |
| CN208397244U (en) * | 2018-06-13 | 2019-01-18 | 东莞泰弘精密机械有限公司 | A kind of multi-section type screw with double screwed tooth structures |
| CN210174135U (en) * | 2019-05-07 | 2020-03-24 | 东莞泰星五金制品厂有限公司 | Screw rod with double-thread structure |
| CN111992986A (en) * | 2020-07-21 | 2020-11-27 | 江苏永昊高强度螺栓有限公司 | Manufacturing and processing technology of bolt |
| CN214521841U (en) * | 2020-12-29 | 2021-10-29 | 浙江精宏机械有限公司 | Special parallel double-screw is extruded to floor |
| CN214395275U (en) * | 2020-12-30 | 2021-10-15 | 东莞泰星五金制品厂有限公司 | Screw rod with good homogenization effect |
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Application publication date: 20220304 |