CN103551985A - Preparation method for polishing wheel containing natural fibers and foaming agent - Google Patents
Preparation method for polishing wheel containing natural fibers and foaming agent Download PDFInfo
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- CN103551985A CN103551985A CN201310553809.2A CN201310553809A CN103551985A CN 103551985 A CN103551985 A CN 103551985A CN 201310553809 A CN201310553809 A CN 201310553809A CN 103551985 A CN103551985 A CN 103551985A
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Abstract
The invention discloses a preparation method for a polishing wheel containing natural fibers and foaming agent. The preparation method includes the following steps: the natural fibers, the foaming agent and binder are mixed and uniformly stirred; the material is uniformly paved in a mould cavity; and the material is pressed to be shaped for two times by a hydraulic oil press.
Description
Technical field
The present invention relates to the preparation method of the polishing wheel of a kind of including natural fibers and blowing agent, belong to grinding tool field.
Background technology
There is following defect in the various polishing wheels of current making: 1. polishing efficiency is low, as fiber crops wheel (which floor sisal hemp is sewed together, and only has end face to participate in grinding).Chinese patent CN1238254A discloses a kind of sisal fiber polishing wheel, discloses its preparation method to be: adopt needing machine that sisal hemp short fibre is made to felted stock, then by layer 2-4 sisal hemp felted stock through superimposed, be stitched into a kind of sisal fiber polishing wheel.There is following shortcoming in the sisal fiber polishing wheel prepared by this kind of method: one, because used sisal fiber length only has 4-12cm, thereby polishing wheel in use sisal fiber easily come off, shortened the service life of polishing wheel; Two, because of the restriction of needling density, can not guarantee can to combine closely in any position of polishing wheel, thereby also can affect the result of use of polishing wheel.
Chinese patent CN200410029879.9 has disclosed a kind of manufacture method of sisal fiber polishing wheel, and it is after the sisal fiber prescinding, synthetic resin and optional other plant and inorganic compound are evenly mixed, are dried, hot-forming.The polishing wheel that this method is produced is owing to being mold pressing and thering is no that material with holes so that total are very fine and close does not have space, thereby easily causes emery wheel surface temperature rising bonding agent inefficacy surface blackening in whole grinding process, the waste of raw material breaking releasing; Thereby grinding workpiece also can cause greatly the concentrated grinding workpiece surface of also likely polluting of stress by surface temperature rise simultaneously.
Summary of the invention
For above-mentioned technical problem, the object of the present invention is to provide a kind of preparation method of new polishing wheel.
Above-mentioned purpose of the present invention is achieved by the following technical solution: the preparation method of the polishing wheel of a kind of including natural fibers and blowing agent, comprises the steps:
1) natural fiber, blowing agent are mixed with binding agent and stirred;
2) material uniform spreading step 1 being obtained is in die cavity;
3) hydraulic press pressurizes compressing for the first time;
4) release, and baking, the compacting of then pressurizeing for the second time, baking-curing then, comes out of the stove after being slowly down to room temperature, mould unloading.
In the present invention, described natural fiber refers to nature fiber original or that directly obtain on the plant of cultivation, on the animal of artificial feeding, includes but not limited to string, animal origin, mineral fibres.In concrete example of the present invention, described natural fiber is selected from seed fiber, as cotton, kapok etc.; Or leaf fibre, as sisal hemp, abaca etc.; Also or fasciated fiber, as ramie, flax, hemp, jute etc.In another example of the present invention, described natural fiber is selected from hair and silk, such as sheep's wool, goats hair, camel hair, the rabbit hair, yak hair or mulberry silk, tussah silk etc.Natural fiber described in the present invention can also be the recycled fiber of those Mian ﹑ Ma ﹑ Mao ﹑ silks.
In the present invention, described blowing agent is sodium acid carbonate.The addition of blowing agent is the 0.01%-10% of natural fiber quality, can be 1%, 1.1%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 6%, 8% etc.
In the present invention, described bonding agent can be urea aldehyde, melamine resin, epoxy resin or inorganic binder etc., also can be phenolic resin modified, the phenolic aldehyde that comprises the modifications such as urea aldehyde, melamine resin, epoxy, acrylic acid, consumption of binder is raw material total mass ratio 20～50%.
Between natural fiber of the present invention and foam hole (by the hole becoming after blowing agent foaming), mixed proportion can regulate according to actual needs, the mixed proportion that changes natural fiber (volume ratio 1%-99%) and foam hole (volume ratio 99%-1%), can obtain different polishing effects.Adopt the benefit of natural fiber to be, the natural fiber blackout of can not feeling like jelly in the process of grinding;
Natural fiber can strengthen structural strength as reinforcement again simultaneously.
Foam hole of the present invention (the volume ratio 1%-9% of pore-forming metapore) not only can dispel the heat but also be can also reduce not significantly structural strength from the basis of sharp crazing development simultaneously.Foam hole can produce and be conducive to the space of polishing and from sharp crazing and have pooling feature in polishing wheel tissue.This structure polishing wheel forms many hole-closing structures and disperses related stress, on the basis that reduces not significantly structural strength, because foam, to abscess adhesive linkage around, can bring a large amount of micro-cracks, these micro-cracks and bubble are exactly good energy absorption pond when wheel is ground impact force action, thereby have avoided wheel body in polishing process, consume too fast and rupture and drop.After allowing abscess break, form tough mouthful of the polishing that varies in size and distribute at diverse location in polishing process, also be that heat dissipation channel is conducive to reduce wheel itself and grinding workpiece surface temperature simultaneously, thereby improve the service life of wheel, the utilization rate of raising material and minimizing are caused stress to concentrate by throwing surface of the work possibility by carburizing.The effect that the foam hole of controlling by volume brings is that abscess is more, and polishing efficiency is higher, and the temperature rise of being thrown workpiece and polishing wheel surface is fewer.
In the present invention, pressurization is for the first time toasted 2h at suppressing latter 80 ℃, and pressurization is for the second time toasted 4-6h at suppressing latter 120 ℃.
Polishing wheel of the present invention can adopt two kinds of typical surface structures: plane polishing wheel and circumference polishing wheel.As described in Fig. 1 or 2.Fig. 3 illustrates the microstructure of polishing wheel, therefrom can find out that binding agent combines natural fiber securely.Blowing agent self forms again many not of uniform size, different foam holes.Fig. 4 is the another kind of form microstructure schematic diagram of polishing wheel.In the middle of being, difference increased one deck grid sisal hemp cloth as reinforcement.During making plane polishing wheel, be simultaneously stained with back of the body lid, while making circumference polishing wheel, without the back of the body, cover.In the present invention, back of the body lid can be glass lid, sisal hemp etc.
Further, as illustrated in fig. 1 and 2, on the polishing disk working face of polishing wheel of the present invention, groove is also set, for plane polishing wheel, described groove is mind-set surrounding radiated entends in polishing disk; For circumference polishing wheel, described groove is vertically arranged along polishing disk working face.Described groove is more conducive to grinding, moves back bits and heat radiation, reduces surface of the work residual stress, simultaneously for new provides condition from sharp crack growth.
Accompanying drawing explanation
Fig. 1 is plane polishing wheel schematic diagram of the present invention.
Fig. 2 is circumference polishing wheel schematic diagram of the present invention.
Fig. 3 is the microstructure schematic diagram of polishing wheel of the present invention.
Fig. 4 is the microstructure schematic diagram of another kind of polishing wheel of the present invention.
Fig. 5 is the shaping mould that is heating and curing of the present invention.
Fig. 6 is plane polishing wheel stereogram of the present invention.
Fig. 7 is plane polishing wheel sectional schematic diagram of the present invention.
Fig. 8 is the relation of blowing agent addition and grinding ratio in embodiment 1 plane polishing wheel sample 1-3, grinding efficiency.
Fig. 9 is the relation of blowing agent addition and exemplar surface roughness in embodiment 1 plane polishing wheel sample 1-3.
Figure 10 is the relation of blowing agent addition and grinding ratio in embodiment 1 circumference polishing wheel sample 1-3, grinding efficiency.
Figure 11 is the relation of blowing agent addition and exemplar surface roughness in embodiment 1 circumference polishing wheel sample 1-3.
Figure 12 is the relation that embodiment 1 circumference polishing wheel sample 4-6 blowing agent addition meets or exceeds critical value and grinding ratio, grinding efficiency.
Figure 13 is the relation that embodiment 1 circumference polishing wheel sample 4-6 blowing agent addition meets or exceeds critical value exemplar surface roughness.
Figure 14 is the process chart of preparing polishing wheel.
Figure 15 is the another kind of process chart of preparing polishing wheel.
In figure, 1 for back of the body lid, 2 be polishing disk, 3 for foam hole, 4 for natural fiber, 5 for binding agent and blowing agent, 6 for grid sisal hemp cloth, 7 for natural fiber, binding agent and blowing agent blends, 8 be metal mold cavity mould.
The specific embodiment
Embodiment 1(explores blowing agent and the relation of natural fiber mixing mass ratio variation with rubbing down effect)
Formula 1:
1 sample production
1, sample production
1.1 batch mixings: in ratio in each style formula in formula 1, take successively natural fiber, (as made the plane polishing wheel of plane polishing, use thin number, make the circumference polishing wheel of circumference polishing and use thick number), under stirring, add blowing agent, guarantee to stir; Finally under stirring, add modification liquid phenolic resin, stir.Have suffered batch mixing process, surely will guarantee that batch mixing evenly (can not occur caking, clustering phenomena).
1.2 compactings are with curing: press shaping density 0.6-0.7g/cm
3, according to done rubbing down wheel volume size, calculate weighing.Load weighted material is divided uniformly in die cavity and (as made plane polishing wheel, first packed cover into die cavity, then material is spread out in cover uniformly; As make circumference polishing wheel, first by semi-uniform being spread out in die cavity of material, then add sisal hemp or glass fiber reticular cloth, then remaining second half material is spread out on sisal hemp or glass fiber reticular cloth uniformly).After dress mould completes, with hydraulic press, pressurize for the first time compressing.Then release is toasted after 2h at 80 ℃, pressurizes for the second time after compacting, toasts (plane polishing wheel solidifies 4h, and circumference polishing wheel solidifies 6h) after 4-6h at 120 ℃, come out of the stove after being slowly down to room temperature, and mould unloading.
1.3 tests are made style and are: plane polishing wheel: overall diameter is 4 inches (101.6-103mm), and internal diameter is 55mm, and aperture is 16mm, thickness 6-8mm);
Circumference polishing wheel: overall diameter is that 10.6 inches of (270mm) apertures are 32mm, thickness 30mm);
Detect and test data contrast:
1, method of testing explanation: this grinding detects material and is: the plane polishing wheel of plane rubbing down: 45# steel plate (the thick * 10mm of the wide 100mm* of long 200mm*); Circumference polishing wheel: 45# rod iron (long 200mm* diameter * 50mm), (grinding material, rubbing down wheel bear pressure, and rotational line speed (plane polishing wheel: 60m/s, circumference polishing wheel: 40m/s) all identical under identical grinding condition respectively.
2, each index calculating method explanation:
2.1 grinding efficiencies: refer to that the worn amount of material is divided by the grinding time, the g/min of unit.
2.2 grinding ratios: the worn amount of material of exemplar and the ratio of rubbing down foot wheel abrasion amount.
2.3 surface roughnesses: refer to less spacing and small peak valley unevenness that finished surface has, the um of unit.Surface roughness is less, and surface is more smooth.With two-tube light-section microscope, measure.
Total grinding testing time is 30min, and every 10min is one section, and minute three sections of collection data, ask arithmetic mean of instantaneous value.
3, Data Collection
3.1 use formulas 1 are done the face wheel (sample 1, sample 2, sample 3) and conventional 4 inch nylon wheels, the contrast of sisal hemp wheel grinding index for plane rubbing down:
Note: blowing agent mass ratio (with natural fiber comparison) is: sample 1:1% sample 2:2% sample 3:3%.
Table 1
In plane polishing wheel sample 1-3, the relation of blowing agent addition and grinding ratio, grinding efficiency as shown in Figure 8; In plane polishing wheel sample 1-3, the relation of blowing agent addition and exemplar surface roughness as shown in Figure 9.
3.2 use formulas 1 are done for circumference polishing wheel (sample 1, sample 2, sample 3) and conventional 10.6 inch nylon wheels, the contrast of sisal hemp wheel grinding index.
Table 2
In circumference polishing wheel sample 1-3, the relation of blowing agent addition and grinding ratio, grinding efficiency as shown in figure 10; In circumference polishing wheel sample 1-3, the relation of blowing agent addition and exemplar surface roughness as shown in figure 11.
3.3 rise to blowing agent mass ratio: sample 4:4% sample 5:6% sample 6:8%, when (in the constant situation of amount of resin) exploration blowing agent meets or exceeds critical value with fiber quality ratio, the rubbing down effect of wheel, the rubbing down effect of wheel, this test is made circumference polishing wheel by sample 4,5,6, carrys out test comparison.
Table 3
The relation that circumference polishing wheel sample 4-6 blowing agent addition meets or exceeds critical value and grinding ratio, grinding efficiency as shown in figure 12; The relation that circumference polishing wheel sample 4-6 blowing agent addition meets or exceeds critical value exemplar surface roughness as shown in figure 13.
Test brief summary:
1, by embodiment 1 (filling a prescription 1) sample testing data analysis, obtain:
In same wheel, along with blowing agent and natural fiber mass ratio become large, the foam hole volume in wheel tissue increases, and foam hole quantity increases, and the polishing performance of wheel improves.
2, by 3.3 sample testing data analyses, obtain:
In same wheel, in the certain situation of amount of resin, along with blowing agent mass ratio improves, the polishing performance of wheel, grinding performance is improved and (but notes: when blowing agent addition reaches critical value or surpasses critical value, grinding performance is by step-down; The consumption of blowing agent will and be ground material according to the kind of selected blowing agent, specification the requirement of the polishing performance of wheel, grinding performance is considered).
3, the sample testing data by embodiment and conventional nylon wheel, sisal hemp disc sharpener test data are comprehensively analyzed: the plane polishing wheel of the plane rubbing down of making by the method, the circumference polishing wheel of circumference rubbing down, on polishing performance, improve 30%-35%, by adjusting the consumption (and bonding agent, fiber, blowing agent in wheel tissue are transferred to suitable ratio) of blowing agent, all can meet difference and be ground the requirement of material to the polishing performance of wheel.
Claims (9)
1. a preparation method for the polishing wheel of including natural fibers and blowing agent, comprises the steps:
1) natural fiber, blowing agent are mixed with binding agent and stirred;
2) material uniform spreading step 1 being obtained is in die cavity;
3) hydraulic press pressurizes compressing for the first time;
4) release, and baking, the compacting of then pressurizeing for the second time, baking-curing then, comes out of the stove after being slowly down to room temperature, mould unloading.
2. polishing wheel as claimed in claim 1, wherein said natural fiber is selected from the recycled fiber of cotton, kapok, sisal hemp, abaca, ramie, flax, hemp, jute, sheep's wool, goats hair, camel hair, the rabbit hair, yak hair, mulberry silk, tussah silk Huo Mian ﹑ Ma ﹑ Mao ﹑ silk.
3. polishing wheel as claimed in claim 1, wherein said blowing agent is sodium acid carbonate etc.
4. polishing wheel as claimed in claim 1, the addition of wherein said blowing agent is the 0.01%-10% of natural fiber quality.
5. polishing wheel as claimed in claim 1, described polishing wheel comprises plane polishing wheel and circumference polishing wheel.
6. polishing wheel as claimed in claim 5, described plane polishing wheel wheel also comprises that the back of the body that is bonded in polishing disk one side by binding agent covers.
7. polishing wheel as claimed in claim 1, is provided with groove on the working face of described polishing disk.
8. preparation method as claimed in claim 1, wherein toasts 2h in pressurization for the first time at suppressing latter 80 ℃, and pressurization is for the second time toasted 4-6h at suppressing latter 120 ℃.
9. the polishing wheel that method prepares as described in claim 1-8 any one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310553809.2A CN103551985A (en) | 2013-11-08 | 2013-11-08 | Preparation method for polishing wheel containing natural fibers and foaming agent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310553809.2A CN103551985A (en) | 2013-11-08 | 2013-11-08 | Preparation method for polishing wheel containing natural fibers and foaming agent |
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| CN103551985A true CN103551985A (en) | 2014-02-05 |
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| CN201310553809.2A Pending CN103551985A (en) | 2013-11-08 | 2013-11-08 | Preparation method for polishing wheel containing natural fibers and foaming agent |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1502622A1 (en) * | 1965-03-05 | 1969-06-26 | C Hilzinger Thum Fa | Polishing roller for surface treatment |
| CN1229376A (en) * | 1996-09-11 | 1999-09-22 | 美国3M公司 | Abrasive article and its method of making |
| CN1238254A (en) * | 1998-06-05 | 1999-12-15 | 南宁麻纺织厂 | Polishing wheel for sisal hemp and its making method |
| US6440185B2 (en) * | 1997-11-28 | 2002-08-27 | Noritake Co., Ltd. | Resinoid grinding wheel |
| CN1562570A (en) * | 2004-03-31 | 2005-01-12 | 黄焕仪 | Method for polishing wheet from sisal fiber |
| US20080227375A1 (en) * | 2005-05-27 | 2008-09-18 | Chung-Chih Feng | Ultra Fine Fiber Polishing Pad |
| CN101870091A (en) * | 2010-06-17 | 2010-10-27 | 大连理工大学 | Method for preparing ultra-fine diamond grinding wheel of vitrified bond |
-
2013
- 2013-11-08 CN CN201310553809.2A patent/CN103551985A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1502622A1 (en) * | 1965-03-05 | 1969-06-26 | C Hilzinger Thum Fa | Polishing roller for surface treatment |
| CN1229376A (en) * | 1996-09-11 | 1999-09-22 | 美国3M公司 | Abrasive article and its method of making |
| US6440185B2 (en) * | 1997-11-28 | 2002-08-27 | Noritake Co., Ltd. | Resinoid grinding wheel |
| CN1238254A (en) * | 1998-06-05 | 1999-12-15 | 南宁麻纺织厂 | Polishing wheel for sisal hemp and its making method |
| CN1562570A (en) * | 2004-03-31 | 2005-01-12 | 黄焕仪 | Method for polishing wheet from sisal fiber |
| US20080227375A1 (en) * | 2005-05-27 | 2008-09-18 | Chung-Chih Feng | Ultra Fine Fiber Polishing Pad |
| CN101870091A (en) * | 2010-06-17 | 2010-10-27 | 大连理工大学 | Method for preparing ultra-fine diamond grinding wheel of vitrified bond |
Non-Patent Citations (2)
| Title |
|---|
| 杜俊超: "聚氨酯微孔抛光磨具", 《化学推进剂与高分子材料》 * |
| 苏民 等: "《粘砂纤维磨具》", 《磨料磨具与磨削》 * |
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Application publication date: 20140205 |
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