CN103203453A - Grinding wheel manufacturing method of edge-sharpening single crystal diamond tool - Google Patents
Grinding wheel manufacturing method of edge-sharpening single crystal diamond tool Download PDFInfo
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- CN103203453A CN103203453A CN2013100984735A CN201310098473A CN103203453A CN 103203453 A CN103203453 A CN 103203453A CN 2013100984735 A CN2013100984735 A CN 2013100984735A CN 201310098473 A CN201310098473 A CN 201310098473A CN 103203453 A CN103203453 A CN 103203453A
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- sintering
- ball milling
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- 238000000227 grinding Methods 0.000 title claims abstract description 30
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 26
- 239000010432 diamond Substances 0.000 title claims abstract description 26
- 239000013078 crystal Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 30
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 25
- 239000000956 alloy Substances 0.000 claims abstract description 25
- 238000005245 sintering Methods 0.000 claims abstract description 24
- 238000000498 ball milling Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 12
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 12
- 238000005498 polishing Methods 0.000 claims abstract description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000010937 tungsten Substances 0.000 claims abstract description 5
- 238000005551 mechanical alloying Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 239000011651 chromium Substances 0.000 claims description 8
- 239000011812 mixed powder Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910001651 emery Inorganic materials 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 238000005054 agglomeration Methods 0.000 claims description 4
- 230000002776 aggregation Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 238000003701 mechanical milling Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000003754 machining Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 230000003064 anti-oxidating effect Effects 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 abstract 1
- 238000009966 trimming Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000599 Cr alloy Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 1
- 229910001573 adamantine Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000713 high-energy ball milling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention discloses a grinding wheel manufacturing method of an edge-sharpening single crystal diamond tool, belonging to the technical field of powdery metallurgy, and particularly relates to the grinding wheel manufacturing method of the edge-sharpening single crystal diamond tool. The grinding wheel manufacturing method comprises the following steps of: selecting Mo, W and Cr powder as grinding wheel raw materials; and preparing a tungsten-based alloy grinding disc by using ball milling of a high-energy ball mill and plasma sintering. The method specifically comprises the following manufacturing steps of: firstly, determining the composition proportion of the grinding wheel; then preparing alloy powder through a mechanical alloying method; preparing the alloy grinding disc by using discharge plasma sintering; and trimming the alloy grinding disc. The tungsten-based alloy grinding disc has the characteristics of high high-temperature strength, good anti-oxidation and abrasion resistance in combination with performance requirements of a high-speed frictional polishing technology on the material of the grinding disc. The abrasion amount of the grinding wheel is reduced while a higher grinding rate is obtained, the edge quality of the tool is guaranteed, the requirements of precision machining are met, and the method has good application prospect in the aspect of chemical catalytic machining of diamond.
Description
Technical field
The invention belongs to powder metallurgical technology, specially refer to a kind of method for manufacturing grinding wheel of sharpening single-crystal diamond cutter.
Background technology
For the ultra precision cutting processing technology, obtain the high accuracy of part shape size and the ultra-smooth of finished surface, except must having ultraprecise lathe, high-resolution detecting instrument and overstable processing environment condition, also must possess the high-precision diamond cutter that carries out machining.Use accurate single-crystal diamond cutter to be processed with non-ferrous metal and nonmetal, can directly cut out the finished surface of ultra-smooth, so just can replace finishing steps such as superfine grinding, improve working (machining) efficiency greatly, also can guarantee machining accuracy and machined surface quality simultaneously.Therefore, to the making of single-crystal diamond cutter, the research of grinding method and sharpening mechanism has been subjected to people and has paid close attention to greatly.The hardness of diamond crystal is big, and wearability is good, makes diamond become desirable cutter material, but has brought great difficulty also for simultaneously the sharpening of single-crystal diamond cutter.In the sharpening process, should improve the grinding rate, guarantee cutting edge quality again.The tribochemistry polishing is to utilize diamond cutter surface and mild steel or directly contact and the do relative slippage at a high speed of pure iron abrasive disc, excite diamond cutter surface carbon atomic layer that the activation back takes place thus and form the activated carbon atom, the activated carbon atom is diffused in the abrasive disc and reaches the removal of cutter material.But in actual process, because processing temperature is very high, abrasive disc is oxidation very easily, and then produces than galling.To guarantee that simultaneously abrasive disc at high temperature has bigger intensity, prevent the machining accuracy of bigger deformation effect diamond cutter.
At present, though employed abrasive disc can obtain certain polishing efficiency, be difficult to satisfy precision machined requirement at aspects such as catalytic performance, mechanical strength and non-oxidizabilitys, not only low to adamantine clearance, and abrasive disc self serious wear.
Summary of the invention
The technical barrier that the present invention will solve is the defective that overcomes prior art, invents a kind of method for manufacturing grinding wheel of sharpening single-crystal diamond cutter, in conjunction with the performance requirement of high-speed friction polishing technology to the abrasive disc material, invents a kind of tungsten-bast alloy abrasive disc.Mo-W-Cr alloy in the abrasive disc has very high fusing point, elevated temperature strength and non-oxidizability.Simultaneously, three kinds of elements all are the excellent graphited metallic elements of catalytic gold hard rock, have improved the technological deficiency that existing diamond sharpening abrasion of grinding wheel is fast, inhomogeneous and grinding efficiency is low.When obtaining higher grinding rate, reduce the abrasion of grinding wheel amount again, and guaranteed the cutting edge quality of cutter, satisfy precision machined requirement.
Technical scheme of the present invention is: a kind of method for manufacturing grinding wheel of sharpening single-crystal diamond cutter, select Mo, and W, three kinds of powder of Cr adopt high energy ball mill ball milling and plasma agglomeration to make the tungsten-bast alloy abrasive disc as the emery wheel raw material, and concrete making step is as follows:
1) determine the composition proportion of emery wheel: adopt Mo, W, three kinds of powder of Cr, every kind of powder purity is 99.9%, and granularity is-300 orders, determines 8 ~ 10% molybdenum in molar ratio, 88 ~ 91% tungsten, all the other are chromium, then, carry out proportioning and mix three kinds of powder;
2) prepare alloy powder by the mechanical alloying method: stainless steel ball and mixed-powder are packed in the vacuum ball grinder, and the mass ratio of stainless steel ball and mixed-powder is 10:1, adds ball milling controlling agent normal heptane; For preventing jar interior powder oxidation in mechanical milling process, in the time of applying argon gas air in the jar is discharged, vacuumize, repeat 2 ~ 3 times; Carry out premixed, rotating speed is 200r/min, and ball milling is 2 hours on high-energy planetary formula ball mill, after the premixed rotational speed regulation is arrived 360r/min, ball milling is 96 hours again, at last rotating speed is added to 480r/min, ball milling 2 hours, ball milling finishes, and finishes the alloy powder preparation;
3) utilize discharge plasma sintering to make the alloy sand wheel disc: the screening particle diameter is less than the alloyed powder of 20 μ m, the alloy powder of weighing constant weight, put into the graphite jig of discharging plasma sintering equipment, after precompressed, carry out sintering, sintering temperature is 900 ℃, and temperature retention time is 10min, and sintering pressure is 50kN, vacuum is 15Pa, obtains the abrasive disc of certain size behind the sintering;
4) the alloy sand wheel disc is repaired: the abrasive disc behind the sintering is removed burr, blow off with pressure-air, two surfacings, after the numbering, use sand papering with trimmer; And polish at polishing machine, use washed with de-ionized water at last, and dry up, make the wheel face cleaning smooth.
Effect of the present invention and benefit are: diamond clearance height, the abrasion of grinding wheel rate is low, can make the diamond cutter surface roughness Ra reach several nanometers.The tungsten-bast alloy abrasive disc elevated temperature strength height that adopts high-energy ball milling and plasma agglomeration to make, good in oxidation resistance, wear-resistant, molten carbon effect excellence.
Description of drawings
Fig. 1 is the scanning electron microscope sem photo before molybdenum powder, tungsten powder, the chromium powder mixed-powder ball milling.Fig. 2 be molybdenum powder, tungsten powder, chromium powder through finishing the scanning electron microscope sem photo of prealloy in 100 hours behind the ball milling, Fig. 3 is Mo-W-Cr alloy polishing disk metallographic structure microphoto.
The specific embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.The present invention is from the graphited mechanism of transition metal-catalyzed diamond, in conjunction with the performance requirement of high-speed friction polishing technology to the abrasive disc material, invented a kind of tungsten-bast alloy abrasive disc, select Mo, W, three kinds of powder of Cr adopt high energy ball mill ball milling and plasma agglomeration to make the tungsten-bast alloy abrasive disc as the emery wheel raw material.
Embodiment 1, a kind of method for manufacturing grinding wheel of sharpening single-crystal diamond cutter:
1) determines the composition proportion of emery wheel: adopt Mo, W, three kinds of powder of Cr, every kind of powder purity is 99.9%, granularity is-300 orders, and 8%:91%:1% takes by weighing the molybdenum powder of 4.37g, the tungsten powder of 95.33g, the chromium powder of 0.3g in molar ratio, mix three kinds of powder then, the sem photograph of mixed-powder as shown in Figure 1.
2) prepare alloy powder by the mechanical alloying method: stainless steel ball and mixed-powder are packed in the vacuum ball grinder, and the mass ratio of stainless steel ball and mixed-powder is 10:1, adds ball milling controlling agent normal heptane; For preventing jar interior powder oxidation in mechanical milling process, in the time of applying argon gas air in the jar is discharged, vacuumize, repeat 2 ~ 3 times; Carry out premixed, rotating speed is 200r/min, and ball milling is 2 hours on high-energy planetary formula ball mill, after the premixed rotational speed regulation is arrived 360r/min, ball milling is 96 hours again, at last rotating speed is added to 480r/min, ball milling 2 hours, ball milling finishes, and finishes the alloy powder preparation.As shown in Figure 2, uniform particles is tiny, average-size 30 μ m.
3) utilize discharge plasma sintering to make the alloy sand wheel disc: the screening particle diameter is less than the alloyed powder of 20 μ m, the alloy powder of weighing 70g, put in the graphite jig that the discharging plasma sintering equipment diameter is 30mm, carry out sintering after precompressed, 900 ℃ of sintering temperatures, temperature retention time are 10min, sintering pressure 50kN, vacuum is 15Pa, and it is 30mm that final sintering goes out diameter, and thickness is the abrasive disc of 5mm.Yield strength 700Mpa when the abrasive disc density is 99%, 900 ℃, room temperature hardness HRC90.
4) abrasive disc finishing: the abrasive disc behind the sintering is removed burr with polishing machine, and use the grinding machine correction, guarantee that abrasive disc is smooth smooth.As shown in Figure 3, the abrasive disc of sintering has fine and close microstructure behind long-time ball milling.
Through high-speed friction polishing test, adopt tungsten base grinding wheel of the present invention, the diamond clearance can reach 1.5 μ m/min, the about 0.35mm of abrasion of grinding wheel rate
3/ min.Compare with traditional mechanical lapping, this emery wheel sharpening single-crystal diamond cutter is more effective, and the sharpening process is more stable, is having a good application prospect aspect the chemical catalysis processing diamond.
Claims (1)
1. the method for manufacturing grinding wheel of a sharpening single-crystal diamond cutter is characterized in that, selects Mo, and W, three kinds of powder of Cr adopt high energy ball mill ball milling and plasma agglomeration to make the tungsten-bast alloy abrasive disc as the emery wheel raw material, and concrete making step is as follows:
1) determine the composition proportion of emery wheel: adopt Mo, W, three kinds of powder of Cr, every kind of powder purity is 99.9%, and granularity is-300 orders, determines 8 ~ 10% molybdenum in molar ratio, 88 ~ 91% tungsten, all the other are chromium, then, carry out proportioning and mix three kinds of powder;
2) prepare alloy powder by the mechanical alloying method: stainless steel ball and mixed-powder are packed in the vacuum ball grinder, and the mass ratio of stainless steel ball and mixed-powder is 10:1, adds ball milling controlling agent normal heptane; For preventing jar interior powder oxidation in mechanical milling process, in the time of applying argon gas air in the jar is discharged, vacuumize, repeat 2 ~ 3 times; Carry out premixed, rotating speed is 200r/min, and ball milling is 2 hours on high-energy planetary formula ball mill, after the premixed rotational speed regulation is arrived 360r/min, ball milling is 96 hours again, at last rotating speed is added to 480r/min, ball milling 2 hours, ball milling finishes, and finishes the alloy powder preparation;
3) utilize discharge plasma sintering to make the alloy sand wheel disc: the screening particle diameter is less than the alloyed powder of 20 μ m, the alloy powder of weighing constant weight, put into the graphite jig of discharging plasma sintering equipment, after precompressed, carry out sintering, sintering temperature is 900 ℃, and temperature retention time is 10min, and sintering pressure is 50kN, vacuum is 15Pa, obtains the abrasive disc of certain size behind the sintering;
4) the alloy sand wheel disc is repaired: the abrasive disc behind the sintering is removed burr, blow off with pressure-air, two surfacings, after the numbering, use sand papering with trimmer; And polish at polishing machine, use washed with de-ionized water at last, and dry up, make the wheel face cleaning smooth.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104046874A (en) * | 2014-07-11 | 2014-09-17 | 辽阳斯佳机械配件有限公司 | Tungsten-based alloy for granulating template |
CN106077653A (en) * | 2016-07-20 | 2016-11-09 | 大连理工大学 | A kind of preparation method of novel W Mo Cr alloy polishing disk |
CN106553134A (en) * | 2016-12-02 | 2017-04-05 | 大连圣洁热处理科技发展有限公司 | A kind of grinding wheel and preparation method thereof |
CN108081158A (en) * | 2017-12-15 | 2018-05-29 | 清华大学 | Emery wheel and preparation method thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1947947A (en) * | 2006-11-02 | 2007-04-18 | 大连理工大学 | Method for mfg. abrasion wheel for flattening milling large dimension diamond diaphragm |
CN101680076A (en) * | 2007-05-22 | 2010-03-24 | 六号元素有限公司 | coated diamond |
CN102114616A (en) * | 2010-12-06 | 2011-07-06 | 中原工学院 | Ti3AlC2-radical ceramic bond and cubic boron nitride (CBN) grinding tool and manufacturing method |
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2013
- 2013-03-26 CN CN201310098473.5A patent/CN103203453B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1947947A (en) * | 2006-11-02 | 2007-04-18 | 大连理工大学 | Method for mfg. abrasion wheel for flattening milling large dimension diamond diaphragm |
CN101680076A (en) * | 2007-05-22 | 2010-03-24 | 六号元素有限公司 | coated diamond |
CN102114616A (en) * | 2010-12-06 | 2011-07-06 | 中原工学院 | Ti3AlC2-radical ceramic bond and cubic boron nitride (CBN) grinding tool and manufacturing method |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104046874A (en) * | 2014-07-11 | 2014-09-17 | 辽阳斯佳机械配件有限公司 | Tungsten-based alloy for granulating template |
CN104046874B (en) * | 2014-07-11 | 2016-02-10 | 辽阳斯佳机械配件有限公司 | A kind of pelletizing template tungsten-bast alloy |
CN106077653A (en) * | 2016-07-20 | 2016-11-09 | 大连理工大学 | A kind of preparation method of novel W Mo Cr alloy polishing disk |
CN106077653B (en) * | 2016-07-20 | 2018-04-10 | 大连理工大学 | A kind of preparation method of new W Mo Cr alloy polishing disks |
CN106553134A (en) * | 2016-12-02 | 2017-04-05 | 大连圣洁热处理科技发展有限公司 | A kind of grinding wheel and preparation method thereof |
CN108081158A (en) * | 2017-12-15 | 2018-05-29 | 清华大学 | Emery wheel and preparation method thereof |
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