CN103100977B - Preparation method of high-strength diamond grinding wheel dressing pen - Google Patents
Preparation method of high-strength diamond grinding wheel dressing pen Download PDFInfo
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- CN103100977B CN103100977B CN201310032780.3A CN201310032780A CN103100977B CN 103100977 B CN103100977 B CN 103100977B CN 201310032780 A CN201310032780 A CN 201310032780A CN 103100977 B CN103100977 B CN 103100977B
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Abstract
The invention discloses a preparation method of a high-strength diamond grinding wheel dressing pen. The preparation method is characterized in that through utilization of the hot pressed sintering technology, polycrystalline diamond is sintered with wolfram carbide (WC) hard alloy as a pen head of the dressing pen. The preparation method includes the detail steps: cleaning the surface of the polycrystalline diamond, weighing and processing powder according to a certain material prescription of the WC hard alloy, sintering the diamond and the hard alloy materials to obtain the pen head of the dressing pen, and then brazing the pen head on a pen rod to obtain the high-strength diamond grinding wheel dressing pen. The grinding wheel dressing pen obtained through the preparation method has the advantages of being good in heat resistance and strength, and capable of meeting the requirement of precise machining, prolonging service life, reducing comprehensive cost, and being strong in process operability, and good in repeatability.
Description
Technical field
Diamond grinding wheel dressing pen that the present invention relates to a kind of high strength and preparation method thereof is specifically that a kind of nib have employed diamond grinding wheel dressing pen that man-made polycrystalline diamond material and WC based hard alloy material sinter and preparation method thereof.
Background technology
The emery wheel of grinding class, during processing work, surface is easily cemented by swarf particles, affects ground effect.Therefore need to adopt a kind of grinding wheel dressing pen to remove the abrasive dust of wheel face, make emery wheel recover sharp property.Due to rely on during trimming wheel emery wheel and finishing pen or finishing knife to mill, comparatively large to the wearing and tearing of nib, therefore generally adopt diamond as nib.But because China's natural diamond resource is more rare, especially grade diamond will exceed tens times than waiting outer diamond price, and therefore, current grinding wheel dressing pen is more adopt diamond.
The processing method of existing diamond grinding wheel dressing pen normally adopts at pen head top pre-manufactured hole, with laser, diamond film is cut into required shape and size preplating simultaneously layer of metal titanium, then the diamond film of multilayer is superimposed together and inserts in the pre-manufactured hole of steel pen head top, fill out growth solder to be fitted together, process grinding wheel dressing pen.This with accuse the filler processing method of weld be repair the shape of pen nib, size determined by the shaping of pre-manufactured hole completely, while heat resistance and intensity can be subject to the restriction of weld layer between diamond rete.
Summary of the invention
For the deficiency faced in the application of current diamond grinding wheel dressing pen, diamond grinding wheel dressing pen that the invention provides a kind of high strength and preparation method thereof, solves that existing grinding wheel dressing pen is expensive, heat resistance and the problem such as intensity is not enough.It utilizes hot pressing and sintering technique, uses WC cemented carbide powder sintering to prepare correction pen nib, then the finishing pen nib of sintering compacting is soldered on a finishing penholder.Not only maintain adamantine high rigidity and wearability, turn improve finishing pen nib overall heat resistance and intensity, solve stress performance difference that diamond film weld layer brings and cut the problems such as thermogenetic internal distortions.
For achieving the above object, the invention provides a kind of preparation method of diamond grinding wheel dressing pen of high strength, it is characterized in that comprising the following steps:
1, ultrasonic cleaning technology is first utilized to remove polycrystalline diamond surface contamination thing; Weigh by certain WC based hard alloy material formula, ball milling stage by stage, grinds after oven dry, sieves;
2, cleaned polycrystalline diamond and the cemented carbide powder handled well are put into sintering mold in order, and compress;
3, carry out sintering according to the sintering schedule preset in sintering furnace, shaping;
4, the nib of to carry out suitable machined and polishing, reconditioning after nib and preparing is taken out;
5, the nib obtained is brazed on penholder.
Above-mentioned WC based hard alloy material formula is matrix with WC, and bonding agent is with the metal of stability at elevated temperature excellence, and adds appropriate nanostructured flexibilizer, the Hardening agent of high hard material micro mist and grain inhibitor powder.Matrix is WC sub-micro ground rice or nano powder, and mass fraction is 30 ~ 80%; Metal binding agent is one or more in Mo, Ni or rare earth metal, and mass fraction is 2 ~ 5%; The agent of nanometer Hardening is one or more of CNT/line, SiC nanowire/rod or TiC nano wire/rod, and mass fraction is 0.5 ~ 2%; The agent of high hard material micro mist Hardening is that high hard material diamond or CBN obtain one or both, and mass fraction is 10 ~ 70%; Grain inhibitor powder is TaC, VC, Cr
3c
2, in NdC, TiC one or more, mass fraction is 0.1 ~ 2%.
Above-mentioned ball milling adopts wet ball-milling technology, and wherein solvent is absolute ethyl alcohol or industrial naptha, and abrading-ball is high firmly wear-resisting WC ball.
Above-mentioned oven dry adopts vacuum drying method, temperature at 100 ~ 600 DEG C, 6 ~ 48 hours time, vacuum 0 ~-0.33Pa.
Above-mentioned sintering adopts discharge plasma sintering technology or Frequency Induction Heating sintering technology.In discharge plasma sintering process, first pressing is 10 ~ 40MPa, heating rate 160 ~ 300 DEG C/min, and sintering temperature is 800 ~ 1400 DEG C, temperature retention time 2 ~ 15min, heat preservation pressure 35 ~ 60MPa; Cooldown rate 750 DEG C is identical with heating rate in the past, cools after 750 DEG C with stove.And in Frequency Induction Heating sintering process, first pressing is 10 ~ 40MPa, heating rate 200 ~ 500 DEG C/min, sintering temperature is 900 ~ 1500 DEG C, temperature retention time 5 ~ 20min, heat preservation pressure 30 ~ 60MPa; Cooldown rate 750 DEG C is identical with heating rate in the past, cools after 750 DEG C with stove.
Above-mentioned welding manner adopts the soldering of high frequency low temperature money base, and temperature is about 700 DEG C.
Compared with prior art the present invention has following characteristics and beneficial effect:
1, owing to present invention employs man-made polycrystalline diamond material, instead of natural diamond, so greatly reduce instrument cost.
2, diamond is here integral material, and comparing existing multi-layer diamond film, superimposed to have processing simple, the features such as stable molding.
3, described diamond---Hardmetal materials nib has excellent heat resistance and intensity, can reach the requirement of accurately processing and increase the service life, and reduces integrated cost.
4, described preparation method's process operability is strong, reproducible.
Accompanying drawing explanation
Fig. 1 is the generalized section of single-point type diamond grinding wheel dressing pen.
Fig. 2 is the generalized section of four-point diamond grinding wheel dressing pen.
Fig. 3 is the A-A generalized section of Fig. 2.
Reference numeral: 1---man-made polycrystalline diamond, 2---WC based hard alloy material, 3---adhesives, 4---metal penholder.
Detailed description of the invention
Diamond grinding wheel dressing pen that the invention provides a kind of high strength and preparation method thereof, comprises finishing pen nib and two, penholder part composition.Nib is sintered by man-made polycrystalline diamond and WC cemented carbide powder and spreads to, and after obtained nib, soldering can obtain repairing pen on penholder.
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Shown in Figure 1, embodiment one is a kind of single-point type diamond grinding wheel dressing pen.It is that process structure is simple, reduces process costs.It is characterized in that there are following steps:
1, material processed: first utilize ultrasonic cleaning technology to remove polycrystalline diamond surface contamination thing; By the sub-micron WC powder of mass fraction 75%, the Mo powder of 7%, the bortz powder of 16%, the NdC of 0.8%, the SiC nano whisker of 1.2% takes each reagent; The powder taken is added in high-energy stirring ball mill tank, and adds the WC abrading-ball of 10 times of quality and the anhydrous ethanol solvent of 5 times of quality, stirring ball-milling 36 hours; Then add taken Hardening agent ball milling 80 minutes, then add flexibilizer ball milling 20 minutes; The slurry of levigate mixing is put into vacuum drying chamber, at 60 DEG C, under vacuum-0.33Pa condition dry 30 minutes; Aperture is selected to be that the sieve of 1mm sieves after being ground by the powder agate mortar of oven dry.
2, die-filling: cleaned polycrystalline diamond and the cemented carbide powder handled well to be put into prefabricated sintering mold in order, and compresses.
3, sinter: sinter molding in discharge plasma sintering furnace, first pressing is 15MPa, heating rate 180 DEG C/min, sintering temperature 850 DEG C, temperature retention time 3min, heat preservation pressure 50MPa; Cooldown rate 750 DEG C is identical with heating rate in the past, and 750 DEG C adopt stove cold later.
4, post processing 1: take out the nib of to carry out suitable machined and polishing, reconditioning after nib and preparing.
5, soldering: the nib obtained adopted high frequency low temperature money base method for brazing to be fixed on metal penholder, temperature controls at about 700 DEG C.
6, post processing 2: suitable machined and polishing are carried out to training finishing pen.
Shown in Fig. 2,3, embodiment two is a kind of four-point diamond grinding wheel dressing pens.Be characterized in have employed four artificial diamond's stone columns, greatly can improve the service life of diamond tool.With embodiment one unlike, four artificial diamond's stone columns in nib are arranged in parallel, and the WC based hard alloy material of parcel sinters wedge shape into, improves the enabling capabilities to four artificial diamond's stone columns, make finishing pen have better stress performance.It is characterized in that there are following steps:
1, material processed: first utilize ultrasonic cleaning technology to remove polycrystalline diamond surface contamination thing; By the sub-micron WC powder of mass fraction 77%, the Mo powder of 6%, the bortz powder of 16%, the NdC of 0.5%, the SiC nano whisker of 0.5% takes each reagent; The powder taken is added in high-energy stirring ball mill tank, and adds the WC abrading-ball of 10 times of quality and the anhydrous ethanol solvent of 5 times of quality, stirring ball-milling 36 hours; Then add taken Hardening agent ball milling 0.5 hour, then add flexibilizer ball milling 20 minutes; The slurry of levigate mixing is put into vacuum drying chamber, at 40 DEG C, under vacuum-0.33Pa condition dry 60 minutes; The powder agate mortar of oven dry is ground, and selects aperture to be that the sieve of 11mm sieves.
2, die-filling: cleaned polycrystalline diamond and the cemented carbide powder handled well to be put into prefabricated sintering mold in order, and compresses.
3, sinter: in Frequency Induction Heating sintering furnace, carry out sinter molding, first pressing is 15MPa, heating rate 200 DEG C/min, sintering temperature 850 DEG C, temperature retention time 3min, heat preservation pressure 35MPa; Cooldown rate 750 DEG C is identical with heating rate in the past, and 750 DEG C adopt stove cold later.
4, post processing 1: take out the nib of to carry out suitable machined and polishing, reconditioning after nib and preparing;
5, soldering: by nib adopt high frequency low temperature money base soldering tech to be fixed on metal penholder, temperature controls at about 700 DEG C;
6, post processing 2: suitable machined and polishing are carried out to training finishing pen.
Claims (6)
1. a preparation method for the diamond grinding wheel dressing pen of high strength, is characterized in that comprising the following steps:
A, first ultrasonic cleaning technology is utilized to remove polycrystalline diamond surface contamination thing; Weigh by certain WC based hard alloy material formula, ball milling stage by stage, grinds after oven dry, sieves;
B, cleaned polycrystalline diamond and the cemented carbide powder handled well are put into sintering mold in order, and compress;
C, carry out sintering according to the sintering schedule preset in sintering furnace, shaping;
D, take out the nib of to carry out suitable machined and polishing, reconditioning after nib and preparing;
E, the nib obtained to be brazed on penholder.
2. the preparation method of the diamond grinding wheel dressing pen of a kind of high strength according to claim 1, it is characterized in that described WC based hard alloy material formula is for being matrix with WC, bonding agent is with the metal of stability at elevated temperature excellence, and adds appropriate nanostructured flexibilizer, the Hardening agent of high hard material micro mist and grain inhibitor powder; Matrix is WC sub-micro ground rice or nano powder, and mass fraction is 30 ~ 80%; Metal binding agent is one or more in Mo, Ni or rare earth metal, and mass fraction is 2 ~ 5%; The agent of nanometer Hardening is one or more of CNT/line, SiC nanowire/rod or TiC nano wire/rod, and mass fraction is 0.5 ~ 2%; The agent of high hard material micro mist Hardening is one or both of high hard material diamond or CBN, and mass fraction is 10 ~ 70%; Grain inhibitor powder is TaC, VC, Cr
3c
2, in NdC, TiC one or more, mass fraction is 0.1 ~ 2%.
3. the preparation method of the diamond grinding wheel dressing pen of a kind of high strength according to claim 1, it is characterized in that described ball milling adopts wet ball-milling technology, wherein solvent is absolute ethyl alcohol or industrial naptha, and abrading-ball is high firmly wear-resisting WC ball.
4. the preparation method of the diamond grinding wheel dressing pen of a kind of high strength according to claim 1, is characterized in that described oven dry adopts vacuum drying method, temperature 40 DEG C, 60 minutes time or temperature 60 DEG C, 30 minutes time, vacuum-0.33Pa.
5. the preparation method of the diamond grinding wheel dressing pen of a kind of high strength according to claim 1, is characterized in that described sintering adopts discharge plasma sintering technology or Frequency Induction Heating sintering technology; In discharge plasma sintering process, first pressing is 10 ~ 40MPa, heating rate 160 ~ 300 DEG C/min, and sintering temperature is 800 ~ 1400 DEG C, temperature retention time 2 ~ 15min, heat preservation pressure 35 ~ 60MPa; Cooldown rate 750 DEG C is identical with heating rate in the past, cools after 750 DEG C with stove; And in Frequency Induction Heating sintering process, first pressing is 10 ~ 40MPa, heating rate 200 ~ 500 DEG C/min, sintering temperature is 850 DEG C, temperature retention time 5 ~ 20min, heat preservation pressure 30 ~ 60MPa; Cooldown rate 750 DEG C is identical with heating rate in the past, cools after 750 DEG C with stove.
6. the preparation method of the diamond grinding wheel dressing pen of a kind of high strength according to claim 1, it is characterized in that described brazing mode adopts the soldering of high frequency low temperature money base, temperature is about 700 DEG C.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104875114A (en) * | 2015-05-28 | 2015-09-02 | 江苏耐尔特钻石有限公司 | Powder dresser |
| CN105349965B (en) * | 2015-11-03 | 2018-05-29 | 富耐克超硬材料股份有限公司 | A kind of composite polycrystal-diamond and preparation method thereof |
| CN105414692B (en) * | 2016-01-11 | 2017-12-15 | 苏州科技大学 | A kind of preparation method of high-frequency induction heating soldering polycrystalline CBN cutting tool |
| CN105729308A (en) * | 2016-05-09 | 2016-07-06 | 廊坊西波尔钻石技术有限公司 | Brazing type diamond truing pens and processing method |
| CN109231990A (en) * | 2018-11-06 | 2019-01-18 | 河海大学 | A kind of preparation method of tungsten carbide-diamond composite |
| CN110280756B (en) * | 2019-07-15 | 2021-07-06 | 石家庄海川工具有限公司 | Diamond engineering thin-wall drill added with cubic boron nitride and preparation process thereof |
| CN115194160B (en) * | 2022-08-03 | 2024-01-23 | 苏州思珀利尔工业技术有限公司 | Method for preparing spherical polycrystalline diamond sintered body |
Citations (4)
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|---|---|---|---|---|
| CN2424876Y (en) * | 2000-05-15 | 2001-03-28 | 吉林大学 | Grinding wheel dressing pen using diamond thick film as grinding head |
| CN2741720Y (en) * | 2003-07-21 | 2005-11-23 | 陈继锋 | Mixed grinding wheel finishing tool |
| CN101249562A (en) * | 2008-03-26 | 2008-08-27 | 浙江中平粉末冶金有限公司 | Powder metallurgy prescription and technique |
| CN101266858A (en) * | 2008-01-11 | 2008-09-17 | 安徽雄风新材料股份有限公司 | A processing method for sintering neodymium-iron-boron magnetic material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3527448B2 (en) * | 1999-12-20 | 2004-05-17 | 株式会社リード | Dresser for CMP polishing cloth and its manufacturing method |
| JP2001341073A (en) * | 2000-03-30 | 2001-12-11 | Allied Material Corp | Form dresser using columnar diamond |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2424876Y (en) * | 2000-05-15 | 2001-03-28 | 吉林大学 | Grinding wheel dressing pen using diamond thick film as grinding head |
| CN2741720Y (en) * | 2003-07-21 | 2005-11-23 | 陈继锋 | Mixed grinding wheel finishing tool |
| CN101266858A (en) * | 2008-01-11 | 2008-09-17 | 安徽雄风新材料股份有限公司 | A processing method for sintering neodymium-iron-boron magnetic material |
| CN101249562A (en) * | 2008-03-26 | 2008-08-27 | 浙江中平粉末冶金有限公司 | Powder metallurgy prescription and technique |
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