CN1238573C - Method for making electroplated diamond tool by diamond surface activation - Google Patents
Method for making electroplated diamond tool by diamond surface activation Download PDFInfo
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- CN1238573C CN1238573C CN 200310106958 CN200310106958A CN1238573C CN 1238573 C CN1238573 C CN 1238573C CN 200310106958 CN200310106958 CN 200310106958 CN 200310106958 A CN200310106958 A CN 200310106958A CN 1238573 C CN1238573 C CN 1238573C
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- diamond
- plating
- tool
- activation
- adamantine
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Abstract
The present invention discloses a method for manufacturing an electroplated diamond tool through the activation of the surface of a diamond, which belongs to the technology of the preparation of an electroplated diamond tool. The process of the method comprises the preprocessing of the diamond, the preprocessing of a basal body of the tool, the preparation of electroplating liquids, and the implement of an electroplating technology. The present invention is characterized in that the preprocessing of the diamond adopts sensitization and activation, and the key technology of the sensitization and the activation lies in the preparation of sensitizing liquids and activating liquids and the determination of technological conditions. The present invention has the advantages that the activating state of the surface of a diamond grain is improved in the process step of the preprocessing of the diamond, dispersed Pd particles are formed at the surface of the diamond, the binding power between the diamond and a plating layer is enhanced, the work efficiency of the electroplated diamond tool is improved, the service life of the electroplated diamond tool is extended, and a large amount of expensive diamonds can be saved.
Description
Technical field
The present invention relates to a kind of adamantine surface activation and make the method for plating diamond tool, belong to the technology of preparing of plating diamond tool.
Background technology
Plating diamond tool is meant the method by metal electrodeposition, diamond is cemented in a quasi-diamond instrument that is made on the tool base with specified shape.Plating diamond tool is suitable for processing hard crisp difficult-to-machine material, as materials such as Wimet, opticglass, engineering ceramics, jewel, semi-conductor, ferrites.Plating diamond tool is widely used in fields such as machinery, electronics, building, probing, medical treatment.Above-mentioned each field is identical to the requirement of plating diamond tool, promptly higher working (machining) efficiency and long as far as possible work-ing life.For plating diamond tool, coated metal (at present nickel or nickel cobalt (alloy) of adopting) mainly plays a part to support and wedding agent more, and shear action mainly is to be finished by diamond particles.Therefore, the bonding force of coated metal and diamond abrasive grain must be good, avoids coming off too early of diamond abrasive grain, and make plating diamond tool lose cutting power.
Existing plating diamond tool manufacturing technology mainly comprises adamantine pre-treatment, the pre-treatment of tool base, the technologies such as electroplating process of coating and diamond particles.At present, adamantine pre-treatment is only through purification, roughening treatment.Existing diamond pretreatment technology is:
Magnetic separation-alkaline solution boils-washes-and acid solution boils-washes-and plating bath soaks.
Owing to have very high interfacial energy between diamond and common metal and the alloy, cause the surface of diamond particles not soak into for common metal at ambient temperature.So, use the plating diamond tool that existing diamond pretreatment technology is made, its diamond particles is only by being embedded in the coating of machinery, between it and the coated metal, both do not had the chemical type combination, also do not have the seam effect.Diamond particles is subjected to the time spent of doing of cutting force in the course of the work, just in coated metal, occurs easily becoming flexible, and rotation, until coming off, this will reduce the work-ing life of plating diamond tool greatly.According to statistics, account in the most impregnated instrument of diamond tool, adamantine utilization ratio only is about 60%, and a large amount of expensive diamonds come off in the course of processing, run off among scrap.
Although present diamond coating technology can be realized the metallization of diamond surface, as diamond and titanium layers, diamond nickel plating etc., the diamond of plating is used for the manufacturing of sintering quasi-diamond instrument more, can not be applied to plating diamond tool.Because, the diamond surface metallization of plating, electroconductibility is good, if carry out the plating of diamond tool, in burying the sand process, the diamond of plating and steel matrix and coating constitute negative electrode jointly, can occur then that numerous diamond particles bonds together mutually, caked phenomenon, can't prepare qualified plating diamond tool.
Summary of the invention
The object of the present invention is to provide a kind of adamantine surface activation to make the method for plating diamond tool.This method changes the condition of surface of diamond particles in adamantine pretreatment process, form dispersive palladium particle at diamond surface.This method can effectively strengthen the bonding force between diamond and the electrodeposition of metals, improves the working (machining) efficiency and the work-ing life of plating diamond tool.
The present invention is realized by following technical proposals.At tool base coating surface diamond, the process that produces plating diamond tool comprises: adamantine pre-treatment, the enforcement of the pre-treatment of tool base and the preparation of electroplate liquid and electroplating technology.Described diamond preprocessing process comprises: magnetic separation-purification, alligatoring-sensitization-activation.Described tool base preprocessing process comprises: tool base reconditioning-oil removing-etch-connection lead-insulation processing-clamping tool-oil removing-weak etch.Described nickel cobalt (alloy) electroplate liquid is mainly by NiSO
47H
2O, CoSO
47H
2O, NiCl
26H
2O, H
3BO
3, C
12H
25SO
4Na, C
6H
4COSO
2NH forms.Electroplating technology is plating bottom-upward sand plating-thickening plating-cleaning.It is characterized in that adamantine sensitization is handled, is that the employing component is SnCl
22H
2O 10-20g/L, HCl (1.19g/L) 30-50mL/L, the sensitizing solution of tin grain 0.3-1.0g, diamond is soaked in the sensitizing solution under 20-30 ℃ of condition and stirs 2-5min, with the diamond particles after the distilled water cleaning sensitization.Then, under 20-30 ℃ of condition, diamond being soaked in component is PdCl again
20.1-0.25g/L, in the activation solution of HCl (1.19g/L) 2.0-5.0mL/L, stir 0.5-1min, with the diamond particles after the distilled water cleaning activation, obtaining surface deposition has the diamond that disperses the palladium particle.At last, diamond is immersed in the electroplate liquid, is used for sand and electroplates.
The invention has the advantages that, in diamond particles pretreatment technology process, diamond adopts the surface activation treatment technology, improved the surface activation state of diamond particles, form dispersive palladium particle at diamond surface, as Fig. 1, combine with chemotype between the diamond particles thereby form coating, improve the bonding force between coated metal and diamond particles in the plating diamond tool.When adopting the diamond making plating diamond tool of activated processing, when electrolytic coating contacts with the palladium particle, the palladium particle has constituted negative electrode with steel matrix and coating, the galvanic deposit that produces nickel (or nickel cobalt) on palladium particle surface, as Fig. 2, nickel (or nickel cobalt) forms metallic bond with palladium through electrocrystallization and is connected.And the palladium particle that does not contact with coating with steel matrix does not constitute negative electrode, does not participate in the electrocrystallization process, and therefore, the diamond particles in the last sand process can not bond mutually, becomes piece.Use the plating diamond tool that the art of this patent is made, can increase coating and adamantine bonding force, significantly improve the work-ing life of plating diamond tool, can save the diamond of a large amount of costlinesses, and consumption such as the conservation of power energy, significant social and economic benefit are arranged.
Description of drawings
The synoptic diagram of the diamond surface depositing Pd particle after Fig. 1 activation treatment.Among the figure: 1 is diamond, and 2 is the palladium particle.
The diamond of Fig. 2 palladium particle and the synoptic diagram that combines of coating.Among the figure: 1 is diamond, and 2 is the palladium particle, and 3 is coating, and 4 is tool base.
Fig. 3 adopts the diamond of activation treatment and the comparison diagram of the grinding ratio of the electroplated diamond bistrique of the diamond fabrication of activation treatment not respectively.Among the figure: the grinding ratio of the electroplated diamond bistrique of activation treatment diamond fabrication is adopted in the dash area representative.
Fig. 4 adopts the diamond of activation treatment and the comparison diagram of the durability of the electroplated diamond bit of the diamond fabrication of activation treatment not respectively.Among the figure: the durability of the electroplated diamond bit instrument of activation treatment diamond fabrication is adopted in the dash area representative.
The not electron micrograph of the plating diamond tool of activation treatment diamond particles preparation of Fig. 5.Among the figure: upper left is a diamond particles, and lower right-most portion is a metal plating.
The electron micrograph of the plating diamond tool of the diamond particles preparation of Fig. 6 after with activation treatment.Among the figure: upper left is a diamond particles, and lower right-most portion is a metal plating.
Embodiment
(1) adamantine pretreatment technology
A) magnetic separation is handled: remove the bigger diamond particles of magneticinduction with magnet, the grain size number scope 40/45～230/270 of diamond particles.
B) purification, roughening treatment: the 20g diamond particles is immersed in the 300mL 10%NaOH solution, is constantly boiling 30min under the stirring, the cooling back is extremely neutral with distilled water flushing, and boils 2min with distilled water, and is extremely neutral with distilled water flushing again.Be soaked in then in the 300mL 10%HCl solution, boil 30min under constantly stirring, the cooling back is extremely neutral with distilled water flushing.
C) sensitization is handled: with the SnCl of 6g
22H
2O is dissolved in the hydrochloric acid that 20mL concentration is 1.19g/L, and all dissolving back adding distil water is diluted to 500mL, and adds 0.5g tin grain in sensitizing solution, and is standby.Under 25 ℃ of conditions, will purify, the diamond after the roughening treatment immerses in the 100mL sensitizing solution and stir 2min, clean diamond particles after the sensitization with distilled water then.
D) activation treatment: with 0.1g PdCl
2Be dissolved in the hydrochloric acid that 1-2mL concentration is 1.19g/L, all dissolving back adding distil water is diluted to 500mL, and is standby.Under 25 ℃ of conditions, the diamond after the sensitization is put into the 100mL activation solution, stir 1min, repeat to wash diamond particles after the activation with distilled water.
E) diamond particles after will activating is immersed in the 100mL electroplating solution consistent with plating solution formula.
(2) pre-treatment of tool base
The tool base material of made is 35 steel, and diamond grit number is 120/140, and its particle size range 0.125mm～0.106mm adopts the nickel cobalt (alloy) plating solution formula.
The pretreatment technology flow process of tool base is as follows: matrix reconditioning-oil removing (metal cleaner, 50 ℃)-flushing with clean water-connection lead-minor insulation processing-clamping tool-flushing with clean water-distillation washing-etch (40%HCl, 20-30 ℃)-distillation washing-oil removing (electrochemical degreasing, 70 ℃ of alkali lye, current density 5A/dm
2, 1.5min)-and distillation washing-weak etch (10%HCl, 25 ℃, 0.5min).
(3) electroplating technical conditions
A) prescription of plating bath and processing condition:
NiSO
4·7H
2O 250g/L
CoSO
4·7H
2O 10g/L
NiCl
2·6H
2O 15g/L
H
3BO
3 35g/L
C
12H
25SO
4Na 0.10g/L
C
6H
4COSO
2NH 1.0g/L
PH value 4.4-4.6
42 ℃ of temperature
B) plating bottom: tool base is chargedly gone into coating bath through last procedure (weak etch) of surface preparation afterwards, and current density is 1.0A/dm
2, time 20min, powering at matrix surface plates out the thin metal plating of one deck.
C) bury sand on the sand method: according to the shape and the layout of anchor clamps, with suction pipe or little spoon diamond particles is placed on the pre-clad tool base surface or it around, the preplating position of tool base is imbedded in the diamond particles.When the metal ion galvanic deposit, coating begins to control one deck diamond abrasive grain near the tool base surface, and diamond tentatively is cemented on the prime coat.For the diamond particles of granularity 120/140, the sand current density is 0.8A/dm in the employing
2, last sand time 60min.
D) unload sand: remove not other diamond particles fixed with tool base.
E) thickening plating:, after unloading sand, thicken plating to the plating piece of first-class sand.For the diamond particles of granularity 120/140, current density is 1.5A/dm
2, the thickening time is 3-4h, makes diamond particles be accounted for 2/3 of diamond particle diameter by the length of embedment of coating.For the plating diamond tool that contains the multilayer abrasive material, can repeat sand-unload sand-thickening plating process.
F) clean 100～200 ℃ of oven dry with water purification.
Claims (1)
1. an adamantine surface activation is made the method for plating diamond tool, and its process comprises: adamantine pre-treatment, and the enforcement of the pre-treatment of tool base and the preparation of electroplate liquid and electroplating technology, the nickel cobalt (alloy) electroplate liquid is mainly by NiSO
47H
2O, CoSO
47H
2O, NiCl
26H
2O, H
3BO
3, C
12H
25SO
4Na, C
6H
4COSO
2The NH composition, electroplating technology is plating bottom-upward sand plating-thickening plating-cleaning, it is characterized in that: adamantine sensitization is handled, and is that the employing component is SnCl
22H
2O, 10-20g/L; 1.19g/L HCl, 30-50mL/L; The tin grain, the sensitizing solution of 0.3-1.0g, diamond is soaked in the sensitizing solution under 20-30 ℃ of condition and stirs 2-5min, and with the diamond particles after the distilled water cleaning sensitization, under 20-30 ℃ of condition, diamond being soaked in component is PdCl again then
20.1-0.25g/L, in the activation solution of the HCl 2.0-5.0mL/L of 1.19g/L, stir 0.5-1min, with the diamond particles after the distilled water cleaning activation, obtaining surface deposition has the diamond that disperses the palladium particle, at last diamond is immersed in the electroplate liquid, is used for sand and electroplates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310106958 CN1238573C (en) | 2003-11-10 | 2003-11-10 | Method for making electroplated diamond tool by diamond surface activation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310106958 CN1238573C (en) | 2003-11-10 | 2003-11-10 | Method for making electroplated diamond tool by diamond surface activation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1544706A CN1544706A (en) | 2004-11-10 |
| CN1238573C true CN1238573C (en) | 2006-01-25 |
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ID=34334298
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310106958 Expired - Fee Related CN1238573C (en) | 2003-11-10 | 2003-11-10 | Method for making electroplated diamond tool by diamond surface activation |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371118C (en) * | 2004-11-26 | 2008-02-27 | 张延锋 | Saw blade with grinding function and its production thereof |
| CN103173840B (en) * | 2013-03-12 | 2015-10-21 | 白鸽磨料磨具有限公司 | A kind of preparation method of grinding plated diamond grinding wheel |
| CN105862108B (en) * | 2013-05-09 | 2017-12-12 | 连云港市通达石英制品有限公司 | Using the process units of the diamond wire of generation device of rotating magnetic field |
| CN104480513A (en) * | 2014-12-27 | 2015-04-01 | 湖北吉隆表面工程有限公司 | Method for manufacturing grinding file by plating diamond particles on surface of flexible steel belt compositely |
| CN110449678B (en) * | 2019-07-23 | 2021-05-18 | 河南机电职业学院 | Brazing method for improving connection strength of PDC and steel matrix |
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2003
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