CN105773452A - Device and method for preparing fiber grinding wheel with orderly arranged spiral fibers - Google Patents
Device and method for preparing fiber grinding wheel with orderly arranged spiral fibers Download PDFInfo
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- CN105773452A CN105773452A CN201610287415.0A CN201610287415A CN105773452A CN 105773452 A CN105773452 A CN 105773452A CN 201610287415 A CN201610287415 A CN 201610287415A CN 105773452 A CN105773452 A CN 105773452A
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- fiber
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- plug
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- 239000000835 fiber Substances 0.000 title claims abstract description 124
- 238000000227 grinding Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 238000002360 preparation method Methods 0.000 claims abstract description 28
- 239000011159 matrix material Substances 0.000 claims abstract description 26
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 10
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003822 epoxy resin Substances 0.000 claims abstract description 6
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 6
- 239000005011 phenolic resin Substances 0.000 claims abstract description 6
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 29
- 239000000843 powder Substances 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 22
- 229920001971 elastomer Polymers 0.000 claims description 18
- 229910009043 WC-Co Inorganic materials 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000007767 bonding agent Substances 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 10
- 230000008023 solidification Effects 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 5
- 229910052961 molybdenite Inorganic materials 0.000 claims description 5
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 3
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 3
- 239000001099 ammonium carbonate Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- RCHKEJKUUXXBSM-UHFFFAOYSA-N n-benzyl-2-(3-formylindol-1-yl)acetamide Chemical compound C12=CC=CC=C2C(C=O)=CN1CC(=O)NCC1=CC=CC=C1 RCHKEJKUUXXBSM-UHFFFAOYSA-N 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims description 2
- 238000001192 hot extrusion Methods 0.000 claims description 2
- 238000003698 laser cutting Methods 0.000 claims description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 abstract 1
- 229910001651 emery Inorganic materials 0.000 description 41
- 239000002585 base Substances 0.000 description 25
- 229910003460 diamond Inorganic materials 0.000 description 7
- 239000010432 diamond Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000035508 accumulation Effects 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 238000000498 ball milling Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- UYDPQDSKEDUNKV-UHFFFAOYSA-N phosphanylidynetungsten Chemical compound [W]#P UYDPQDSKEDUNKV-UHFFFAOYSA-N 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229950000845 politef Drugs 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/02—Wheels in one piece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/009—Tools not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
本发明公开了一种螺旋有序排布纤维砂轮的制备装置及方法。所述装置包括砂轮成型机构和纤维等高出刃机构；所述砂轮成型机构包括上模板、下模板、模套Ⅰ、模套Ⅱ和芯棒；所述纤维等高出刃机构包括支座、电磁铁和卡箍。所述制备方法为：将酚醛树脂、导热材料、金属氧化物、固体润滑剂和造孔剂按比例混合，热压成型制得坯体；用深孔钻在坯体外圆周加工呈螺旋分布的系列圆孔获得基体；圆孔内填充环氧树脂，将纤维逐条嵌入圆孔内，采用砂轮成型机构将纤维固定在基体上；用纤维等高出刃机构确保纤维出刃高度一致；加热固化环氧树脂，砂轮成型。本发明具有纤维出刃高度一致、把持力大、抗弯能力强，砂轮修整工作量小、制造成本低、使用寿命长等优点。
The invention discloses a preparation device and method for a spirally ordered fiber grinding wheel. The device includes a grinding wheel forming mechanism and a fiber contour cutting mechanism; the grinding wheel forming mechanism includes an upper template, a lower template, a mold sleeve I, a mold sleeve II and a core rod; the fiber contour cutting mechanism includes a support, an electromagnet and a clamp. The preparation method is: phenolic resin, a heat conductive material, a metal oxide, a solid lubricant and a pore-forming agent are mixed in proportion, and hot-pressed to obtain a blank; a deep hole drill is used to process a series of circular holes in a spiral distribution on the outer circumference of the blank to obtain a matrix; epoxy resin is filled in the circular holes, and fibers are embedded in the circular holes one by one, and the grinding wheel forming mechanism is used to fix the fibers on the matrix; a fiber contour cutting mechanism is used to ensure that the fiber cutting height is consistent; the epoxy resin is heated and cured, and the grinding wheel is formed. The invention has the advantages of consistent fiber cutting height, large holding force, strong bending resistance, small grinding wheel dressing workload, low manufacturing cost, and long service life.
Description
Technical field
The invention belongs to grinding tool preparation field, the preparation facilities of a kind of emery wheel and method, especially a kind of spiral shell
The preparation facilities of rotation ordered arrangement fiber grinding wheel and method.
Background technology
Grinding Technology is that to realize Precision Machining, Ultra-precision Turning in modern mechanical manufacturing industry most effective, most widely used
One of general processing technique.Emery wheel, as the instrument of grinding, is developed rapidly, but tradition emery wheel preparation technology is also
Coming with some shortcomings, such as abrasive particle is easy to fall off, need to periodically repair, grinding area temperature is high, the easy carbonization of some bonding agent is decomposed, made
Short etc. with the life-span.
In order to solve the problem that above emery wheel exists, patent " a kind of high-accuracy plating of Publication No. CN102009391B
The manufacturing process of CBN emery wheel " it is with electric plating method, abrasive particle to be plated on matrix, this process increases the emery wheel handle to abrasive particle
Holding force, decreases coming off of abrasive particle, but this stone abrasive grain layer is monolayer, do not have follow-up abrasive particle to mend after emery wheel abrasive wear
Filling, its service life is somewhat limited, and right through repeatedly pickling or alkali cleaning in electroplating abrasion wheel manufacturing process
Environment has considerable influence, and this invention is more harsh to the process conditions of emery wheel making simultaneously, and technique is complex.Publication No.
The patent " resin anchoring agent diamond grinding wheel " of CN102615598B by use phosphorus tungsten bronze alloy powder as filler, to change
The serviceability of kind resin anchoring agent diamond grinding wheel so that it is there is good self-sharpening and heat conductivity, but this kind of emery wheel pair
The hold of abrasive particle is less, and abrasive particle easily comes off, and reduces the service life of emery wheel.Have that scholar proposes emery wheel abrasive particle is orderly
Arrangement or employing fiber replace conventional abrasive particles to undertake grinding task, and research finds that abrasive particle ordered arrangement and fiber grinding wheel all can be relatively
Improve the heat dispersion in wheel grinding district and the problem of Grain Falling Off can be alleviated in big degree, but its preparation technology is the most multiple
Miscellaneous, and fiber height of protrusion concordance difference etc. problem could not effectively be solved always.Publication No. is the special of CN103381577A
Profit " a kind of diamond fiber grinding wheel preparation method and section mold ", by by diamond strip fiber and carcass through hot-forming
Make emery wheel locking nub, and obtain skive by hot-forming together with grinding wheel base body material for multiple emery wheel locking nub.By this
Fiber grinding wheel prepared by method significantly improves the chip space of emery wheel, the emery wheel hold to diamond and the use longevity of emery wheel
Life, reduces the temperature of grinding area, but this preparation method exists certain defect, in the preparation process of emery wheel locking nub, and resin
Bonding agent there will be softening and flow phenomenon under high temperature, high pressure, and therefore diamond fiber unavoidably can soft because of resinoid bond
Changing and flow and dislocation occur, after causing abrasive wheel forming, there is accumulation or the vacancy phenomenon of diamond fiber in local location, grinding
Time emery wheel vibrations aggravation, reduce grinding accuracy.
Summary of the invention
The problem existed for prior art, the invention provides the preparation facilities of a kind of helicoidal order arrangement fiber grinding wheel
And method.The emery wheel prepared by the method has that fiber height of protrusion is consistent, hold is big, bending resistance is strong, crushing
The advantages such as workload is little, chip space is big, grinding area perfect heat-dissipating, low cost of manufacture, length in service life.
To achieve these goals, the technical solution used in the present invention is: the system of a kind of helicoidal order arrangement fiber grinding wheel
Standby device includes that grinding wheel forming mechanism and fiber etc. exceed sword mechanism；Described grinding wheel forming mechanism includes cope match-plate pattern, lower bolster, mould
Set I, die sleeve II, plug, bolt I, plain cushion I, nut and hexagon socket head cap screw；Have on described cope match-plate pattern, lower bolster annular boss and
Relief hole；Described annular boss outer wall and die sleeve I, the laminating of die sleeve II inwall, annular boss inwall is fitted with matrix outer wall, described
Plug inserts in matrix endoporus；Described die sleeve I, die sleeve II are connect by hexagon socket head cap screw, cope match-plate pattern, lower bolster by plain cushion I,
Nuts and bolt I connects, and constitutes grinding wheel forming mechanism；Described fiber etc. exceed sword mechanism include clip, electric magnet, bolt II,
Plain cushion II and bearing；Described electric magnet and guide groove matched in clearance, and by clip, bolt II with plain cushion II is circumferentially equidistant is fixed on
On bearing, constitute fiber etc. and exceed sword mechanism.
The preparation method of a kind of helicoidal order arrangement fiber grinding wheel, preparation process is as follows.
Step one, by bonding agent and filler by certain mass percent mix homogeneously, form compound；Described bonding agent is
Phenolic resin, filler is Heat Conduction Material, metal-oxide, kollag and pore creating material；Described certain mass percent, phenolic aldehyde
Resin is 40%-60%, and Heat Conduction Material is 10%-20%, and metal-oxide is 10%-15%, and kollag is 1.5%-5%, pore-creating
Agent is 3%-5%；Described Heat Conduction Material is aluminium powder, and described metal-oxide is Fe2O3, described kollag is MoS2Make described in,
Hole agent is ammonium carbonate；Compound is loaded in mold cavity, use hot extrusion briquetting technique to prepare base substrate, and solid for the first time with mould
Changing, then release, the demoulding are taken out base substrate and are carried out secondary solidification again；Described base substrate be shaped as hollow cylinder, external diameter is 30-
60 mm, internal diameter is 10-20 mm, and height is 10-30 mm；The hot-forming parameter of described base substrate: hot press molding pressure is 4-8
MPa, hot pressing time is 1-2 h, and hot pressing temperature is (160 ± 5) DEG C, and secondary solidification temperature is (170 ± 5) DEG C, during secondary solidification
Between be 10-14 h.
Series circular hole processed on base substrate excircle by step 2, employing depth drill, and Circularhole diameter is 0.8-1.4 mm, circle
Hole is perpendicular to base substrate axis, and helically arranges along base substrate excircle, forms matrix；Circular hole is 4-6 in the pitch-row of circumferencial direction
Mm, pitch is 2-8 mm.
Step 3, plug is inserted in the endoporus of matrix, before inserting, the periphery of plug is coated silicone oil, it is simple to plug
The follow-up demoulding；Epoxy resin is filled up again after embedding rubber stopper in circular hole；Fiber is inserted in circular hole one by one, it is ensured that Mei Geyuan
Kong Zhongjun has a fiber, it is achieved that fiber is at the ordered arrangement in grinding wheel cylindrical week.
Step 4, the grinding wheel base body being inserted with fiber is placed on lower bolster, matrix outer circumference surface and annular boss inwall
Laminating；Die sleeve I, die sleeve II are closed up, and make both inwall fit with annular boss outer wall, the top of fiber and die sleeve I or
Die sleeve II contact internal walls, the end of fiber contacts with rubber stopper；Rubber stopper rear end and core rod touch, by hexagon socket head cap screw by mould
Set I, die sleeve II connect and fasten so that die sleeve I, die sleeve II, fiber, rubber stopper, plug contact successively；The thickness of annular boss
It is the gap between matrix outer circumference surface and die sleeve I or die sleeve II inwall, is also the height of protrusion of fiber, tentatively ensure that
The height of protrusion of fiber has concordance.
Step 5, grinding wheel forming mechanism is installed in the holder, make the holding of cope match-plate pattern, lower bolster and bearing concentric；Adjust
Electric magnet is closer to die sleeve I and die sleeve II, and fastening bolt II, by clip fixed electromagnet；Electric magnet energising is produced strong
Magnetic field, fiber its top under the effect of high-intensity magnetic field with magnetic property tightly touch die sleeve I or the inwall of die sleeve II, thus
The height of protrusion achieving fiber has good concordance.
Step 6, place a device in calorstat and be heating and curing, be warming up to (100 ± 5) DEG C in 30 minutes, be incubated 1-2
h；Then it was warming up to (170 ± 5) DEG C in 1 hour, is incubated 10-14 h；Cool to room temperature again with the furnace, the plug demoulding is obtained spiral shell
Rotation ordered arrangement fiber grinding wheel.
The material of described die sleeve I, die sleeve II, cope match-plate pattern and lower bolster is 40Cr, and the material of plug is polytetrafluoroethyl-ne
Alkene, the material of rubber stopper is fluorubber；Described cope match-plate pattern, lower bolster end face are machined with annular boss, and annular boss thickness is 1-2
Mm, height is 1-2 mm；Described cope match-plate pattern and lower bolster end face center are machined with relief hole, and aperture is 2-4 mm.
The magnetic field intensity of described electric magnet is 0.8-1.6 T, and the number of electric magnet is 3-12.
Described fiber is to be prepared gained by compound magnetic conductor CBN-WC-Co, this material be by WC powder, Co powder with
Discharge plasma sintering is used to form after the mixing of CBN granule；CBN grain volume fraction is that 20%-30%, WC-Co volume fraction is
70%-80%, Co powder mass fraction in WC-Co composite powder end is 8%-12%；CBN particle diameter is 40-45 μm, WC powder grain
Footpath is 0.6-1 μm, and Co powder diameter is 0.8-1.2 μm, uses line cutting or laser cutting technique by compound magnetic conductor
CBN-WC-Co cuts into elongated fiber, and fiber cross section is square, and cross-sectional area is 0.3-1 mm2, a length of 6-8
mm。
The particle diameter of described phenolic resin is 35-45 μm, and the particle diameter of aluminium powder is 20-25 μm, Fe2O3Particle diameter is 40-45 μ
M, MoS2Particle diameter be 40-45 μm.
Compared with prior art, the invention has the beneficial effects as follows.
Can tentatively ensure that the height of protrusion of fiber has concordance by the annular boss in grinding wheel forming mechanism, then
Fiber etc. is utilized to exceed the high-intensity magnetic field power produced in sword mechanism so that all of fiber front end can tightly touch die sleeve I or mould
The inwall of set II, it is ensured that all fibres has identical height of protrusion, greatly reduces crushing workload.
Use depth drill to process series manhole on base substrate, and fiber is inserted in circular hole one by one, due to base substrate
Have cured, during anchoring fiber, will not the offseting and misplace relative to position of fiber in adjacent circular holes,
Thus avoid fiber and occur piling up or vacancy phenomenon, solve the fiber accumulations that traditional fibre emery wheel produces in preparation process
Or vacancy, so that emery wheel produces the problem of thick cut when processing workpiece, reduce vibrations during wheel grinding, significantly
Improve Workpiece Machining Accuracy.
The draw ratio of fiber is big, thus increases the contact area of fiber and matrix, increases the matrix handle to fiber
Holding force, during stone, fiber is not easy to come off, and significantly improves the service life of emery wheel.
Fiber is along matrix excircle helically ordered arrangement, thus increases the chip space of emery wheel, increases mill
Cut the influx of district's grinding fluid, the heat exchange property of grinding area can be effectively improved and reduce grinding temperature.
Using depth drill to process series circular hole on base substrate excircle, circular hole is perpendicular to base substrate axis, and fiber is fixed on
In circular hole, it is clear that fiber circumference can carry out four orientation heat radiations, increases the heat exchange area of fiber and grinding fluid, and can reduce sand
Wheel blocking, reduces the grinding heat produced because abrasive dust repeatedly extrudes in grinding area, improves the heat-exchange performance of grinding area further
Can, reduce grinding temperature.
When preparing the emery wheel of different-diameter, device of the present invention only need to be to cope match-plate pattern, lower bolster, die sleeve I and
Die sleeve II is replaced, and fiber etc. exceed other parts such as sword mechanism and need not change, and device the most of the present invention has
Well versatility and interchangeability, effectively reduce the manufacturing cost of emery wheel.
By changing the thickness of annular boss and circular hole in the pitch-row of circumferencial direction and pitch, thus it is possible to vary fiber close
Degree and height of protrusion, with the demand under satisfied different working conditions, therefore have the good suitability.
Accompanying drawing explanation
Fig. 1 is emery wheel preparation facilities explosive view of the present invention.
Fig. 2 is grinding wheel forming mechanism explosive view of the present invention.
Fig. 3 is that fiber of the present invention etc. exceeds sword mechanism explosive view.
Fig. 4 is emery wheel preparation facilities assembly cross section view of the present invention.
Fig. 5 is partial enlarged drawing at A in Fig. 4 of the present invention.
Fig. 6 is base substrate schematic diagram of the present invention.
Fig. 7 is matrix schematic diagram of the present invention.
Fig. 8 is fiber schematic diagram of the present invention.
Fig. 9 is fiber grinding wheel schematic diagram of the present invention.
Figure 1 above is to being denoted as in Fig. 9.
1 matrix, 2 fibers, 3 rubber stoppers, 4 cope match-plate patterns, 5 relief holes, 6 bolts I, 7 plugs, 8 moulds
Set I, 9 die sleeves II, 10 annular boss, 11 lower bolsters, 12 clips, 13 electric magnet, 14 bolts II, 15 plain cushions
II, 16 hexagon socket head cap screws, 17 guide grooves, 18 plain cushions I, 19 nuts, 20 bearings, 21 circular holes, 22 base substrates.
Detailed description of the invention
Below in conjunction with the accompanying drawings the specific embodiment of the invention is described further.
Seeing Fig. 1 to Fig. 9, the preparation facilities of a kind of helicoidal order arrangement fiber grinding wheel, including grinding wheel forming mechanism and fibre
Dimension etc. exceeds sword mechanism.Grinding wheel forming mechanism include cope match-plate pattern 4, lower bolster 11, die sleeve I 8, die sleeve II 9, plug 7, bolt I 6,
Plain cushion I 18, nut 19 and hexagon socket head cap screw 16.Fibers etc. exceed sword mechanism to include clip 12, electric magnet 13, bolt II 14, puts down
Pad II 15 and bearing 20.Cope match-plate pattern 4, lower bolster 11, die sleeve I 8 and die sleeve II 9 should have preferable intensity, hardness, wearability,
The performance such as heat stability and corrosion resistance, therefore the material of die sleeve I 8, die sleeve II 9, cope match-plate pattern 4 and lower bolster 11 is 40Cr.Core
Rod 7 should have certain resistance to elevated temperatures, the most anti-various organic solvent corrosive natures and relatively low coefficient of friction, with convenient
Be heating and curing emery wheel time plug 7 will not soften and can facilitate the follow-up demoulding, therefore plug 7 selection is politef.Rubber
The effect of plug 3 is to be held out against by fiber 2 in the manufacturing process of emery wheel so that it is die sleeve I 8, the inwall of die sleeve II 9, rubber are close in front end
Plug 3 should have bigger elastic deformation, and has certain heat resistance, and therefore rubber stopper 3 material is fluorubber.In upper mold
Plate 4 and lower bolster 11 end face are machined with annular boss 10, and the thickness of annular boss 10 is 1 mm, and height is 1 mm, annular boss
10 outer walls and die sleeve I 8, the laminating of die sleeve II 9 inwall, annular boss 10 inwall fits with matrix 1 outer circumference surface, fiber 2 go out sword
Highly it is the thickness of annular boss 10, the changing of height of protrusion of fiber 2 can be realized by changing the thickness of annular boss 10
Become.Cope match-plate pattern 4 and lower bolster 11 end face center are machined with relief hole 5, a diameter of 2 mm of relief hole 5, its object is to balance
The epoxy resin that pressure inside and outside grinding wheel forming mechanism is unnecessary with discharge, prevents demoulding difficulty phenomenon.Machining preparation
Die sleeve I 8, die sleeve II 9 inner diameter are 32 mm, a diameter of 10 mm of plug 7, and height is 20 mm.Annular boss 10 external diameter is
32 mm, internal diameter is 30 mm, high 1 mm.Working channel 17 on bearing 20, the cross sectional dimensions of guide groove 17 is 30mm × 8 mm,
Article 6, guide groove 17 is distributed on bearing 20.
Fiber 2 selection is the CBN-WC-8Co composite wood that hardness is high, wear-resistant, high temperature resistant, intensity is good, have magnetic property
Material.This composite selects WC powder, Co powder to form through discharge plasma sintering with CBN granule, and therefore this composite will
Wearability, heat stability and high rigidity good for CBN and the high intensity of WC-Co, high tenacity and corrosion resistance perfect adaptation, can make
The processing characteristics of emery wheel significantly improves.CBN grain volume fraction is 25%, and WC-Co volume fraction is 75%, and Co powder is multiple at WC-Co
The mass fraction closed in powder is 8%.CBN mean diameter is 40 μm, and the mean diameter of WC powder is 1 μm, Co powder average
Particle diameter is 0.8 μm.Use line cutting technology that CBN-WC-8Co composite cuts into elongated fiber 2, fiber 2 cross section
For square, cross-sectional area is 0.64 mm2, a length of 6 mm.
The preparation method of a kind of helicoidal order arrangement fiber grinding wheel is as follows.
Step one, by bonding agent and filler by certain mass percent mix homogeneously, form compound；Bonding agent is phenolic aldehyde
Resin, filler is Heat Conduction Material, metal-oxide, kollag and pore creating material；By mass percentage, choosing phenolic resin is
60%, Heat Conduction Material is 20%, and metal-oxide is 12%, and kollag is 4%, and pore creating material is 4%；Selected Heat Conduction Material is aluminum
Powder, metal-oxide is Fe2O3, kollag is MoS2, pore creating material is ammonium carbonate.Add after bonding agent and filler are mixed
Ball milling in ball mill, the volume ratio of ball material is 1:1, and Ball-milling Time is 40 minutes, and overlong time bonding agent easily lumps with filler, time
Between too short, mix uneven, then take out compound and cross No. 80 screen clothes, remove block object.Compound is loaded mold cavity
Interior compacting, heats, adds and be pressed into base substrate 22, and by base substrate 22 with mould insulation, pressurize a period of time, hot press molding pressure is 4
MPa, hot pressing time is 1 h, and hot pressing temperature is 160 DEG C, makes the phenolic resin primary solidification molding in base substrate 22；Though primary solidification
Emery wheel is made to have possessed certain intensity, but without being fully cured, it is necessary to through further heat treatment, to make the resin in emery wheel
Powder fully reacts the netted or structure of build shape forming crosslinking so that it is have higher intensity and more preferable binding ability,
It is thus desirable to carry out secondary cured；Secondary solidification process is, release, demoulding taking-up base substrate 22 are put into and carried out two in calorstat
Secondary solidification, secondary solidification temperature is 170 DEG C, and secondary hardening time is 10 h；Last furnace cooling obtains base substrate 22, base substrate 22
Being shaped as hollow cylinder, external diameter is 30 mm, and internal diameter is 10 mm, and height is 20 mm.
Step 2, depth drill is used process serial circular hole 21 on base substrate 22 excircle, a diameter of 1.2 mm of circular hole 21,
Circular hole 21 is perpendicular to base substrate 22 axis, and helically arranges along base substrate 22 excircle direction, forms matrix 1, and circular hole 21 is at circumference
The pitch-row in direction is 4 mm, and pitch is 3 mm；And during for process requirements under different working conditions, only need to change pitch-row and spiral shell
Away from, the density of fiber 2 can be changed, therefore this emery wheel has the good suitability.
Step 3, plug 7 is inserted in matrix 1 endoporus, coat silicone oil at plug 7 periphery before inserting, it is simple to plug 7
The follow-up demoulding；Then in circular hole 21, embed rubber stopper 3 fill up epoxy resin again；And fiber 2 is inserted in circular hole 21 one by one,
Guarantee each circular hole 21 all has a fiber 2, it is achieved that fiber 2 is at the ordered arrangement in grinding wheel cylindrical week.Fiber 2 is outside emery wheel
The ordered arrangement of circumference, increases the chip space of emery wheel, improves the chip removal ability of emery wheel, it is possible to reduce the temperature of grinding area
Degree, improves the crudy of workpiece.The fiber 2 of big L/D ratio inserts in circular hole 21 simultaneously, increases the emery wheel holding to fiber 2
Power, improves the bending resistance of fiber 2, greatly reduces the probability that fiber 2 comes off, and can be effectively improved the use longevity of emery wheel
Life.And, before inserting fiber 2, matrix 1 has cured, during anchoring fiber 2, in adjacent circular holes 21
Will not offseting and misplace relative to position of fiber 2, thus avoid fiber 2 and occur piling up or the phenomenon of vacancy, efficient solution
Fiber accumulations that fiber grinding wheel of having determined produces in tradition preparation process or vacancy, so that emery wheel produces thick when processing workpiece
The problem of big cut, reduces vibrations during wheel grinding, improves Workpiece Machining Accuracy significantly.
Step 4, the grinding wheel base body 1 being inserted with fiber 2 is placed on lower bolster 11, matrix 1 outer circumference surface and annular boss
10 inwall laminatings；Die sleeve I 8, die sleeve II 9 are closed up, and makes both inwalls fit with annular boss 10 outer wall.The top of fiber 2
End and die sleeve I 8 or die sleeve II 9 contact internal walls, the end of fiber 2 contacts with rubber stopper 3, and rubber stopper 3 rear end contacts with plug 7.
By hexagon socket head cap screw 16, die sleeve I 8, die sleeve II 9 are connect and fasten so that die sleeve I 8, die sleeve II 9, fiber 2, rubber stopper 3,
Plug 7 contacts successively.The thickness of annular boss 10 is matrix 1 outer circumference surface and die sleeve I 8 and the gap of die sleeve II 9 inwall, also
It is the height of protrusion of fiber 2, tentatively ensure that the height of protrusion of fiber 2 has concordance.
Step 5, grinding wheel forming mechanism is arranged in bearing 20, make cope match-plate pattern 4, lower bolster 11 and bearing 20 keep with
The heart.Adjusting electric magnet 13 and be closer to die sleeve I 8 and die sleeve II 9, fastening bolt II 14, by clip 12 fixed electromagnet 13；Will
Electric magnet 13 energising produces high-intensity magnetic field, and fiber 2 its top under the effect of high-intensity magnetic field with magnetic property tightly touch die sleeve I
8 or die sleeve II 9 inwall, it is achieved thereby that the height of protrusion of fiber 2 has good concordance, effectively reduce crushing
Workload.When needing the emery wheel preparing different-diameter, only cope match-plate pattern 4, lower bolster 11, die sleeve I 8 and die sleeve II 9 need to be carried out
Change, it is possible to constituting new grinding wheel forming mechanism, fiber etc. exceeds other parts such as sword mechanism and need not change, and therefore this is prepared
Device has good versatility and interchangeability.
Step 6, place a device in calorstat and be heating and curing, in 30 minutes, be warming up to 100 DEG C, be incubated 1 h, then
In 1 hour, it is warming up to 170 DEG C, is incubated 10 h, then cools to room temperature with the furnace, plug 7 demoulding is obtained helicoidal order arrangement fibre
Dimension emery wheel.
The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, and not
For limiting the scope of the present invention, after having read the present invention, the those skilled in the art's various equivalent form of values to the present invention
Amendment all fall within the application claims limited range.
Claims (5)
1. the preparation facilities of a helicoidal order arrangement fiber grinding wheel, it is characterised in that include grinding wheel forming mechanism and fiber etc.
Exceed sword mechanism；Described grinding wheel forming mechanism includes cope match-plate pattern (4), lower bolster (11), die sleeve I (8), die sleeve II (9), plug
(7), bolt I (6), plain cushion I (18), nut (19) and hexagon socket head cap screw (16)；Described cope match-plate pattern (4), lower bolster have on (11)
Annular boss (10) and relief hole (5)；Described annular boss (10) outer wall and die sleeve I (8), the laminating of die sleeve II (9) inwall, annular
Boss (10) inwall is fitted with matrix (1) outer wall, and described plug (7) is placed in the endoporus of matrix (1)；Described die sleeve I (8), mould
Set II (9) is connect by hexagon socket head cap screw (16), and cope match-plate pattern (4), lower bolster (11) are by plain cushion I (18), nut (19) and spiral shell
Bolt I (6) connects, and constitutes grinding wheel forming mechanism；Described fibers etc. exceed sword mechanism and include clip (12), electric magnet (13), bolt
II (14), plain cushion II (15) and bearing (20)；Described electric magnet (13) and guide groove (17) matched in clearance, and by clip (12),
Bolt II (14) and plain cushion II (15) is circumferentially equidistant is fixed on bearing (20), constitutes fiber etc. and exceeds sword mechanism；
The preparation method of a kind of helicoidal order arrangement fiber grinding wheel, it is characterised in that preparation process is as follows:
Step one, by bonding agent and filler by certain mass percent mix homogeneously, form compound；Described bonding agent is phenolic aldehyde
Resin, filler is Heat Conduction Material, metal-oxide, kollag and pore creating material；Described certain mass percent, phenolic resin
For 40%-60%, Heat Conduction Material is 10%-20%, and metal-oxide is 10%-15%, and kollag is 1.5%-5%, and pore creating material is
3%-5%；Described Heat Conduction Material is aluminium powder, and described metal-oxide is Fe2O3, described kollag is MoS2, described pore creating material
For ammonium carbonate；Being loaded by compound in mold cavity, use hot extrusion briquetting technique to prepare base substrate (22), base substrate (22) is in company with mould
Primary curing, then release, the demoulding are taken out base substrate (22) and are carried out secondary solidification again；Described base substrate (22) be shaped as hollow cylinder
Body, external diameter is 30-60 mm, and internal diameter is 10-20 mm, and height is 10-30 mm；The hot-forming parameter of described base substrate (22):
Hot press molding pressure is 4-8 MPa, and hot pressing time is 1-2 h, and hot pressing temperature is (160 ± 5) DEG C, and secondary solidification temperature is (170
± 5) DEG C, secondary hardening time is 10-14 h；
Step 2, employing depth drill process series circular hole (21), circular hole (21) a diameter of 0.8-on base substrate (22) excircle
1.4 mm, circular hole (21) is perpendicular to base substrate (22) axis, and helically arranges along base substrate (22) excircle, forms matrix (1)；Circle
Hole (21) is 4-6 mm in the pitch-row of circumferencial direction, and pitch is 2-8 mm；
Step 3, by plug (7) insert matrix (1) endoporus in, insert before by plug (7) periphery coat silicone oil, it is simple to
The follow-up demoulding of plug (7)；Epoxy resin is filled up again after inserting rubber stopper (3) in circular hole (21)；Fiber (2) is inserted one by one
In circular hole (21), it is ensured that each circular hole (21) all has a fiber (2), it is achieved that fiber (2) is orderly grinding wheel cylindrical week
Arrangement；
Step 4, the grinding wheel base body (1) being inserted with fiber (2) is placed on lower bolster (11), matrix (1) outer circumference surface and annular
Boss (10) inwall is fitted；Die sleeve I (8), die sleeve II (9) are closed up, and makes both inwalls paste with annular boss (10) outer wall
Closing, the top of fiber (2) and die sleeve I (8) or die sleeve II (9) contact internal walls, the end of fiber (2) contacts with rubber stopper (3), rubber
Plug (3) rear end contacts with plug (7)；By hexagon socket head cap screw (16), die sleeve I (8), die sleeve II (9) connect and fasten, making
Die sleeve I (8), die sleeve II (9), fiber (2), rubber stopper (3), plug (7) contact successively；The thickness of annular boss (10) is
Gap between matrix (1) outer circumference surface and die sleeve I (8) or die sleeve II (9) inwall, is also the height of protrusion of fiber (2), just
Step ensure that the height of protrusion of fiber (2) has concordance；
Step 5, grinding wheel forming mechanism is arranged in bearing (20), makes cope match-plate pattern (4), lower bolster (11) protect with bearing (20)
Hold with one heart；Adjusting electric magnet (13) and be closer to die sleeve I (8) and die sleeve II (9), fastening bolt II (14), by clip (12)
Fixed electromagnet (13)；Electric magnet (13) energising is produced high-intensity magnetic field, there is the fiber (2) effect at high-intensity magnetic field of magnetic property
Its top lower tightly touch die sleeve I (8) or the inwall of die sleeve II (9), it is achieved thereby that the height of protrusion of fiber (2) has very well
Concordance；
Step 6, place a device in calorstat and be heating and curing, be warming up to (100 ± 5) DEG C in 30 minutes, be incubated 1-2 h；So
After be warming up to (170 ± 5) DEG C in 1 hour, be incubated 10-14 h；Cool to room temperature again with the furnace, plug (7) demoulding is obtained spiral shell
Rotation ordered arrangement fiber grinding wheel.
The preparation facilities of a kind of helicoidal order the most according to claim 1 arrangement fiber grinding wheel, it is characterised in that described mould
The material of set I (8), die sleeve II (9), cope match-plate pattern (4) and lower bolster (11) is 40Cr, and the material of plug (7) is polytetrafluoroethyl-ne
Alkene, the material of rubber stopper (3) is fluorubber；Described cope match-plate pattern (4), lower bolster (11) end face are machined with annular boss (10), ring
Shape boss (10) thickness is 1-2 mm, and height is 1-2 mm；Described cope match-plate pattern (4) and lower bolster (11) end face center are machined with and let out
Pressure hole (5), aperture is 2-4 mm.
The preparation facilities of a kind of helicoidal order the most according to claim 1 arrangement fiber grinding wheel, it is characterised in that described electricity
The magnetic field intensity of Magnet (13) is 0.8-1.6 T, and the number of electric magnet (13) is 3-12.
The preparation method of a kind of helicoidal order the most according to claim 1 arrangement fiber grinding wheel, it is characterised in that described fibre
Dimension (2) be to be prepared gained by compound magnetic conductor CBN-WC-Co, this material be WC powder, Co powder are mixed with CBN granule after
Employing discharge plasma sintering forms；CBN grain volume fraction be 20%-30%, WC-Co volume fraction be 70%-80%, Co powder
Mass fraction in WC-Co composite powder end is 8%-12%；CBN particle diameter is 40-45 μm, and WC powder particle diameter is 0.6-1 μm, Co
Powder diameter is 0.8-1.2 μm；Line cutting or laser cutting technique is used to be cut into carefully by compound magnetic conductor CBN-WC-Co
Long fiber (2), fiber (2) cross section is square, and cross-sectional area is 0.3-1 mm2, a length of 6-8 mm.
The preparation method of a kind of helicoidal order the most according to claim 1 arrangement fiber grinding wheel, it is characterised in that described phenol
The particle diameter of urea formaldehyde is 35-45 μm, and the particle diameter of aluminium powder is 20-25 μm, Fe2O3Particle diameter is 40-45 μm, MoS2Particle diameter be
40-45 μm。
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| CN105773452B (en) | 2018-04-13 |
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