CN104439916A - Process for local electroplating of internal threads of nut - Google Patents
Process for local electroplating of internal threads of nut Download PDFInfo
- Publication number
- CN104439916A CN104439916A CN201410543255.2A CN201410543255A CN104439916A CN 104439916 A CN104439916 A CN 104439916A CN 201410543255 A CN201410543255 A CN 201410543255A CN 104439916 A CN104439916 A CN 104439916A
- Authority
- CN
- China
- Prior art keywords
- nut
- protection
- shot
- peening
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000009713 electroplating Methods 0.000 title claims abstract description 9
- 238000007747 plating Methods 0.000 claims abstract description 24
- 238000005422 blasting Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000004677 Nylon Substances 0.000 claims abstract description 6
- 229920001778 nylon Polymers 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 238000005480 shot peening Methods 0.000 claims description 11
- 238000005488 sandblasting Methods 0.000 claims description 8
- 230000006378 damage Effects 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 238000012805 post-processing Methods 0.000 claims description 5
- 238000002203 pretreatment Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 3
- 239000008188 pellet Substances 0.000 claims description 3
- 238000005270 abrasive blasting Methods 0.000 abstract 4
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000002845 discoloration Methods 0.000 abstract 1
- 238000012797 qualification Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002519 antifouling agent Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/02—Electroplating of selected surface areas
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
Provided is a process for local electroplating of internal threads of a nut. The workpiece nut is completely electroplated, and then protection, abrasive blasting, shot blasting, disassembly and aftertreatment are carried out. The process comprises the steps of pretreatment of the workpiece nut, electroplating, tool protection of the internal threads, abrasive blasting for removing plating layers on the outer surface, shot blasting for improving the surface smoothness of the part, disassembly, and aftertreatment. A protection tool is made of a nylon material and is in close fit through threads, and the two ends for tool protection are tightened in the protection process so that the protection tool can be prevented from falling and damaging plating layers of the internal threads in the abrasive blasting and shot blasting processes; the batches of plating layers can be rapidly removed through abrasive blasting, and the glossiness of the surface of the part can be improved and the roughness of the surface of the part can be reduced through shot blasting. The process is easy and convenient to implement, high in efficiency, free of plating missing, discoloration, corrosion and plating layer unevenness, low in cost, small in pollution, capable of achieving the qualified rate higher than 99% and high in universality, and can be applied to local electroplating of internal thread or external thread fasteners.
Description
Technical field
The present invention relates to the process of nut inner thread parcel plating, mainly for nut product internal thread electroplating technology.
Background technology
At mechanical processing industry, to the standard component nut and the self-locking nut that are widely used in the industry such as Aeronautics and Astronautics, boats and ships, its processing specification is many, quantity large, it is high to require, and the engine class standard parts such as Aeronautics and Astronautics require that internal thread carries out electroplating processes, and other has not allowed coating on the surface; The nut that the industry such as Aeronautics and Astronautics uses and self-locking nut specification is little, quantity is large, kind is many, structure relative complex; General conventional selective plating method has adhesive tape winding method, is coated with the methods such as protective paint method, soda acid stripping method; Technological process is: pre-treatment, protection (protection outer surface), plating, dismounting, repairing, post processing.
The phenomenon such as above method operating difficulties, efficiency is low, be easy to cause plating leakage, part variable color, burn into uneven coating are even, qualification rate is low; The materials such as the paint in operating process, acid, alkali to harm and environmental pollution very large; The requirement of batch production can not be reached.Defect spy for traditional selective plating method devises the process of this internal thread parcel plating.
Summary of the invention
The object of the invention is to, a kind of simple and easy, reliable, efficient internal thread parcel plating process is provided.The present invention by improving technique, and carries out parcel plating in conjunction with auxiliary mould internal threads part.
Technical scheme of the present invention:
1, technological process: the pre-treatment of workpiece nut, plating, frock protection (protection internal thread), sandblasting (removing outer surface coating): spray quartz sand: 60-100 order; pressure: 0.4-0.6MPa, shot-peening (improving piece surface fineness): spray ceramic pellet: B60; pressure: 0.4-0.6MPa; time: 10-20min, dismounting, post processing.
2, this process adopts and first all carries out electroplating protecting again, can ensure that product coating is even like this, can produce in enormous quantities.
3, protecting tool set-up adopts nylon material to process, and nylon material is softer, does not damage when protecting to coating, does not also affect the size of part, and machining is also easy.
4, frock protection adopts threaded engagement, coordinates very compact, does not affect the coating of internal thread in stripping galvanization process; During protection, frock two from nut is tightened; When preventing sandblasting, shot-peening, frock comes off, the coating of damage internal thread.
5, adopt blasting method stripping coating, stripping speed be fast, can strip in batches, not etching part, do not pollute and corrode coating, piece surface nondiscolouring.
6, shot-peening can improve glossiness and the roughness of piece surface.
Adopt the beneficial effect of the technical program:
This process is simple to operation, efficiency is high, can not produce plating leakage, variable color, the even phenomenon of burn into uneven coating; Cost is low, pollute less, efficiency is high, qualification rate is high, and qualification rate can reach more than 99%, highly versatile.
The processing of threaded female fastener product parcel plating can be met, the parcel plating of threaded male fastener can also be applied to.
Accompanying drawing explanation
Fig. 1 is the process chart of nut inner thread parcel plating process of the present invention.
Fig. 2 is tool structure embodiment schematic diagram of the present invention.
In Fig. 2: 1-frock protects one end, 2-nut, the 3-frock protection other end.
Detailed description of the invention
Nut inner thread parcel plating process detailed description of the invention of the present invention, then be explained as follows: the technical solution used in the present invention:
1, as the process chart of accompanying drawing 1: its technological process is the pre-treatment of workpiece nut, plating, frock protection (protection internal thread), sandblasting (removal outer surface coating): spray quartz sand: 60-100 order; pressure: 0.4-0.6MPa, shot-peening (improving piece surface fineness): spray ceramic pellet: B60; pressure: 0.4-0.6MPa; time: 10-20min, dismounting, post processing.
2, this process adopts and first is all carried out electroplating protecting by workpiece nut again, can ensure that product coating is even like this, can produce in enormous quantities.
3, protecting tool set-up adopts nylon material to process, and nylon material is softer, does not damage when protecting to coating, does not also affect the size of part, and machining is also easy.
4, frock protection adopts threaded engagement, coordinates very tight, does not affect the coating of internal thread in stripping galvanization process; During protection, frock two from nut is tightened; When preventing sandblasting, shot-peening, frock comes off, the coating of damage internal thread.
5, adopt blasting method stripping coating, stripping speed be fast, can strip in batches, not etching part, do not pollute and corrode coating, piece surface nondiscolouring.
6, shot-peening can improve glossiness and the roughness of piece surface.
Claims (2)
1. a nut inner thread parcel plating process, is characterized in that: 1), adopt and first all carried out electroplating protecting by workpiece nut again, sandblasting, shot-peening, dismounting, post processing; Its technological process is: the pre-treatment of workpiece nut, plating, frock protection, namely protects internal thread, sandblasting, namely removes outer surface coating, shot-peening, be and improve piece surface fineness, dismounting, post processing; 2), protecting tool set-up adopt nylon material processing, frock protection adopt screw thread closely cooperate, protect one end and the other end (1,3) to tighten from two of nut (2) frock during protection; When preventing sandblasting, shot-peening, frock comes off, the coating of damage internal thread; 3), adopt blasting method stripping coating, stripping speed be fast, can strip in batches, not etching part, do not pollute and corrode coating, piece surface nondiscolouring; Shot-peening can improve glossiness and the roughness of piece surface.
2. nut inner thread parcel plating process according to claim 1, it is characterized in that: described sandblasting is spray quartz sand: 60-100 order, pressure: 0.4-0.6MPa, shot-peening are spray ceramic pellet: B60, pressure: 0.4-0.6MPa, time: 10-20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410543255.2A CN104439916A (en) | 2014-10-15 | 2014-10-15 | Process for local electroplating of internal threads of nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410543255.2A CN104439916A (en) | 2014-10-15 | 2014-10-15 | Process for local electroplating of internal threads of nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104439916A true CN104439916A (en) | 2015-03-25 |
Family
ID=52887082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410543255.2A Pending CN104439916A (en) | 2014-10-15 | 2014-10-15 | Process for local electroplating of internal threads of nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104439916A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108436781A (en) * | 2018-04-02 | 2018-08-24 | 四川艾尔诺航空金属器材有限公司 | A kind of tooling and its method of the local coating of removal |
| CN110670099A (en) * | 2019-11-15 | 2020-01-10 | 贵州航天精工制造有限公司 | Local silver plating method for internal thread of self-locking nut of aircraft engine |
| CN110670097A (en) * | 2019-09-03 | 2020-01-10 | 贵州航天电器股份有限公司 | Threaded hole electroplating method for sealing sintering type electric connector |
| CN113183044A (en) * | 2021-05-20 | 2021-07-30 | 西安聚能高温合金材料科技有限公司 | VAR crystallizer inner wall treatment equipment for special alloy and treatment process thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60230971A (en) * | 1984-05-02 | 1985-11-16 | Shinko Bolt Kk | Pretreatment of nut before hot dip galvanizing |
| JPH03158496A (en) * | 1989-11-17 | 1991-07-08 | Furukawa Electric Co Ltd:The | Method for plating tapped hole of nut |
| CN101413126A (en) * | 2008-11-18 | 2009-04-22 | 西安航空发动机（集团）有限公司 | Method for removing nickel coating on surface of stainless steel forging |
| CN102000946A (en) * | 2010-10-14 | 2011-04-06 | 苏州晋日五金机械有限公司 | Nut manufacturing process |
| CN201856172U (en) * | 2010-09-18 | 2011-06-08 | 十堰东森汽车密封件有限公司 | Screw thread protecting plug |
| CN202399156U (en) * | 2011-12-13 | 2012-08-29 | 青岛三利中德美水设备有限公司 | Shot blasting protection tool |
| CN202668361U (en) * | 2012-06-13 | 2013-01-16 | 东莞市硕诚电子有限公司 | Strip type automatic sandblast equipment capable of removing local electroplated layer on terminal |
| US20140216211A1 (en) * | 2011-11-21 | 2014-08-07 | Cheng-Pu Yang | Ratchet and method for making the same |
-
2014
- 2014-10-15 CN CN201410543255.2A patent/CN104439916A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60230971A (en) * | 1984-05-02 | 1985-11-16 | Shinko Bolt Kk | Pretreatment of nut before hot dip galvanizing |
| JPH03158496A (en) * | 1989-11-17 | 1991-07-08 | Furukawa Electric Co Ltd:The | Method for plating tapped hole of nut |
| CN101413126A (en) * | 2008-11-18 | 2009-04-22 | 西安航空发动机（集团）有限公司 | Method for removing nickel coating on surface of stainless steel forging |
| CN201856172U (en) * | 2010-09-18 | 2011-06-08 | 十堰东森汽车密封件有限公司 | Screw thread protecting plug |
| CN102000946A (en) * | 2010-10-14 | 2011-04-06 | 苏州晋日五金机械有限公司 | Nut manufacturing process |
| US20140216211A1 (en) * | 2011-11-21 | 2014-08-07 | Cheng-Pu Yang | Ratchet and method for making the same |
| CN202399156U (en) * | 2011-12-13 | 2012-08-29 | 青岛三利中德美水设备有限公司 | Shot blasting protection tool |
| CN202668361U (en) * | 2012-06-13 | 2013-01-16 | 东莞市硕诚电子有限公司 | Strip type automatic sandblast equipment capable of removing local electroplated layer on terminal |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108436781A (en) * | 2018-04-02 | 2018-08-24 | 四川艾尔诺航空金属器材有限公司 | A kind of tooling and its method of the local coating of removal |
| CN110670097A (en) * | 2019-09-03 | 2020-01-10 | 贵州航天电器股份有限公司 | Threaded hole electroplating method for sealing sintering type electric connector |
| CN110670099A (en) * | 2019-11-15 | 2020-01-10 | 贵州航天精工制造有限公司 | Local silver plating method for internal thread of self-locking nut of aircraft engine |
| CN113183044A (en) * | 2021-05-20 | 2021-07-30 | 西安聚能高温合金材料科技有限公司 | VAR crystallizer inner wall treatment equipment for special alloy and treatment process thereof |
| CN113183044B (en) * | 2021-05-20 | 2024-01-16 | 西安聚能高温合金材料科技有限公司 | Special alloy VAR crystallizer inner wall treatment equipment and treatment process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |
|
| WD01 | Invention patent application deemed withdrawn after publication |