CN102363287B - Resin grinding wheel and manufacturing method thereof - Google Patents

Resin grinding wheel and manufacturing method thereof Download PDF

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Publication number
CN102363287B
CN102363287B CN 201110329228 CN201110329228A CN102363287B CN 102363287 B CN102363287 B CN 102363287B CN 201110329228 CN201110329228 CN 201110329228 CN 201110329228 A CN201110329228 A CN 201110329228A CN 102363287 B CN102363287 B CN 102363287B
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China
Prior art keywords
emery wheel
molding mass
parts
grinding
resin
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CN 201110329228
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Chinese (zh)
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CN102363287A (en
Inventor
李保国
张和平
俞建成
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宁波大华砂轮有限公司
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Priority to CN 201110329228 priority Critical patent/CN102363287B/en
Publication of CN102363287A publication Critical patent/CN102363287A/en
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Abstract

The invention provides a resin grinding wheel and a manufacturing method thereof, which belong to the field of grinding tools and are used for solving the problem of the production of harmful sulfur dioxide by pyrite serving as a lubricating agent existing in the conventional resin grinding wheel. The resin grinding wheel comprises a grinding body and a reinforcing sheet which is arranged inside the grinding body for enhancing the revolving strength of the grinding body, wherein 90-105 parts by mass of corundum is taken as a grinding material the grinding body; 2-8 parts by mass of phenolic aldehyde resin liquid and 6-25 parts by mass of phenolic aldehyde resin powder are taken as bonding agents; and 1-10 parts by mass of cryolite and 1-5 parts by mass of polytetrafluoroethylene powder are taken as fillers. The invention further provides a manufacturing method of the resin grinding wheel. In the grinding wheel, the polytetrafluoroethylene powder instead of pyrite is taken as a lubricating agent, so that sulfur dioxide is not produced and other pollution is avoided in the using process.

Description

A kind of resin polishing emery wheel and preparation method thereof
Technical field
The invention belongs to the grinding tool field, relate to a kind of resin polishing emery wheel and preparation method thereof.
Background technology
Emery wheel is the main tool of grinding, and it is the porous body that is made of abrasive material and bond.Wherein abrasive material, bond and hole are three underlying dimensions of emery wheel.Along with the difference of abrasive material, bond and emery wheel manufacturing process etc., grinding wheel characteristics possibility difference is very big, to precision, roughness and the production efficiency important influence of grinding.Therefore, must select suitable emery wheel for use according to actual conditions.
Resin wheel is that bond is the emery wheel of resin, has that grinding force is little, grinding temperature is low, self-sharpening is good, the grinding efficiency advantages of higher, is widely used in the grinding of hard brittle materials such as carbide alloy, pottery, glass.
In order to make resin wheel can play the lubricated effect of grinding in cutting or bruting process, the filler that is used for preparing emery wheel must have the lubricant and the stabilizing agent of certain proportion content.Existing resin wheel mainly uses pyrite as lubricant, but pyritous main component is a ferrous disulfide, it easily is oxidized to di-iron trioxide and sulfur dioxide in air, and sulfur dioxide gas still all is harmful to environment human body, and corrodes the metal that is cut or polishes easily.
Summary of the invention
The objective of the invention is to have the problems referred to above, proposed a kind of its lubricant the resin of human body environmental sound polishing emery wheel and preparation method thereof at existing technology.
Purpose of the present invention can realize by following technical proposal: a kind of resin polishing emery wheel is provided, described resin polishing emery wheel comprise grinding body and place described grinding body inside, to strengthen the reinforced sheet of described grinding body revolving strength, the abrasive material of described grinding body is a white fused alumina, bond is liquid phenolic resin and phenol-formaldehyde resin powder, filler is ice crystal and polytetrafluoroethylene powder, and the weight proportion of above-mentioned each raw material is:
The present invention also provides a kind of preparation method according to the described resin polishing of claim 1 emery wheel, it is characterized in that, comprises the steps:
Batching: take by weighing raw material, described raw material and weight proportion thereof are 90~105 parts of white fused aluminas, 2~8 parts of liquid phenolic resins, 6~25 parts of phenol-formaldehyde resin powders, 1~10 part of ice crystal, 1~5 part of polytetrafluoroethylene powder;
Batch mixing: earlier white fused alumina is put into liquid phenolic resin and soak into, then the white fused alumina after phenol-formaldehyde resin powder, ice crystal and polytetrafluoroethylene powder and the infiltration is evenly mixed;
Sieve: the feed particles that batch mixing obtains is screened by sieve, be used for the molding mass of moulding by the i.e. conduct of 8~12 purpose particles;
Moulding: take by weighing the molding mass of approrpiate wts, put it in the mould and shakeout, and put into reinforced sheet make described reinforced sheet flatly imbed described molding mass fully in molding mass, compression moulding obtains the emery wheel base, and molding mass promptly solidify to form grinding body;
Oven dry: described emery wheel base is dried in baking oven, and the temperature in the baking oven is incubated 5~8 hours and is cooled to room temperature then behind room temperature gradient increased temperature to 175~190 ℃, promptly obtain the emery wheel finished product.
Adopt resin polishing emery wheel of the present invention and preparation method thereof, in the raw material of emery wheel, white fused alumina densification, hardness height, thereby come the bonding strong advantage of grinding force that has by phenolic resins, emery wheel is emitted a large amount of heats in the process of cutting metal, if untimely distributing will be burnt the sheet phenomenon easily; And ice crystal can play the effect that reduces cutting temperature just.In addition, the present invention introduces polytetrafluoroethylene powder and replaces pyrite as lubricant, utilizes the effect of lubricating, reducing friction of polytetrafluoroethylene (PTFE), improves the self-sharpening of emery wheel; And polytetrafluoroethylene (PTFE) can not corrode processed metal, can also combine with phenolic resins well as macromolecular structure simultaneously and form new strand, thereby strengthen the intensity of emery wheel, and grinding process can not produce pernicious gas yet thereby not pollute the environment.Therefore, composition of raw materials of the present invention has plurality of advantages, can produce good economic benefits.
Description of drawings
Fig. 1 is that resin polishing emery wheel of the present invention is the structural representation of parallel grinding wheel;
Fig. 2 is the structural representation of resin polishing emery wheel of the present invention for cymbals molding sand wheel;
Fig. 3 is the preparation method's of a resin polishing emery wheel of the present invention flow chart.
The specific embodiment
Below be specific embodiments of the invention, and in conjunction with the accompanying drawings technical scheme of the present invention be further described, but the present invention is not limited to these embodiment.
As shown in Figure 1 and Figure 2, resin polishing emery wheel of the present invention comprises grinding body 1 and reinforced sheet 2.
Wherein, grinding body 1 is the main body that emery wheel is realized grinding function, its raw material comprises by abrasive material, filler and bond, the selected abrasive material of the present invention is a white fused alumina, filler is ice crystal and polytetrafluoroethylene powder, bond is selected liquid phenolic resin and phenol-formaldehyde resin powder, and their weight proportion (parts by weight) is 90~105 parts of white fused aluminas, 2~8 parts of liquid phenolic resins, 6~25 parts of phenol-formaldehyde resin powders, 1~10 part of ice crystal, 1~5 part of polytetrafluoroethylene powder successively.Can comprise also in the filler that parts by weight are 0.5~2 colouring matter, for example Fe 2O 3Or carbon black or the two all have.
In a mix proportion scheme, the weight proportion of above-mentioned raw materials is 90 parts of white fused aluminas, 2 parts of liquid phenolic resins, 6 parts of phenol-formaldehyde resin powders, 1 part of ice crystal, 1 part of polytetrafluoroethylene powder, 2 parts of carbon blacks.
In another mix proportion scheme, the weight proportion of above-mentioned raw materials is 105 parts of white fused aluminas, 8 parts of liquid phenolic resins, 25 parts of phenol-formaldehyde resin powders, 10 parts of ice crystals, 5 parts of polytetrafluoroethylene powders.
In other mix proportion schemes, the weight proportion of each raw material is 102 parts of white fused aluminas, 5 parts of liquid phenolic resins, 10 parts of phenol-formaldehyde resin powders, 2 parts of ice crystals, 4 parts of polytetrafluoroethylene powders, Fe 2O 3Contain 0.5 part.
After preferred, each weight proportion is: 95~100 parts of white fused aluminas, 3~5 parts of liquid phenolic resins, 12~20 parts of phenol-formaldehyde resin powders, 3~5 parts of ice crystals, 1~2 part of polytetrafluoroethylene powder, Fe 2O 3Or 0.5~2 part of carbon black.
For example, the weight proportion of each raw material is 100 parts of white fused aluminas, 4 parts of liquid phenolic resins, 15 parts of phenol-formaldehyde resin powders, 4 parts of ice crystals, 2 parts of polytetrafluoroethylene powders, 1 part of carbon black.
In above-mentioned raw materials, white fused alumina densification, hardness height, thus coming the bonding strong advantage of grinding force that has by phenolic resins, emery wheel is emitted a large amount of heats in the process of cutting metal, if untimely distributing will be burnt the sheet phenomenon easily; And ice crystal can play the effect that reduces cutting temperature just.In addition, the present invention introduces polytetrafluoroethylene powder and replaces pyrite as lubricant, utilizes the effect of lubricating, reducing friction of polytetrafluoroethylene (PTFE), improves the self-sharpening of emery wheel; And polytetrafluoroethylene (PTFE) can not corrode processed metal, can also combine with phenolic resins well as macromolecular structure simultaneously and form new strand, thereby strengthen the intensity of emery wheel, and grinding process can not produce pernicious gas yet thereby not pollute the environment.Therefore, composition of raw materials of the present invention has plurality of advantages, can produce good economic benefits.
Reinforced sheet 2 is positioned at grinding body 1 inside, also promptly in manufacture process first layer overlay above-mentioned raw materials, cover reinforced sheet 2, and then the layer overlay raw material covers reinforced sheet 2 fully and obtains.Reinforced sheet 2 can have only a slice, also multi-disc can be arranged, and they and raw material stack gradually arranges, i.e. one deck raw material one deck reinforced sheet ground circulation.The whole formation of multilayer raw material grinding body 1 is clipped in the middle reinforced sheet.
In grinding body 1, place reinforced sheet 2, be in order to improve the revolving strength of emery wheel, revolving strength is one of very important parameter of emery wheel, the ability that opposing is broken under centrifugal action when being meant the emery wheel rotation, to cause emery wheel fragmentation when cutting or polish when revolving strength is defective, and can cause danger to have potential safety hazard user or equipment.Reinforced sheet of the present invention 2 adopts glass fiber sheets, toasts under 110~130 ℃ of temperature and makes in 1~10 minute by putting into baking oven behind the glass fabric coated on both sides phenolic resins, has good tension, bending strength.
The preparation method of above-mentioned resin polishing emery wheel with reinforced sheet 2 comprises batching, batch mixing, sieves, moulding and sclerosis several steps as shown in Figure 3.Particularly, this paper will describe preparation method of the present invention by following two embodiment.
Embodiment 1
The resin polishing emery wheel that present embodiment will prepare is a straight-type wheel, as shown in Figure 1.
At first, take by weighing and have the constant weight proportion raw material and prepare burden, raw material type and parts by weight thereof are respectively 93 parts of white fused aluminas, 4 parts of liquid phenolic resins, 16 parts of phenol-formaldehyde resin powders, 8 parts of ice crystals, 2 parts of polytetrafluoroethylene powders.White fused alumina is 24~30 order granularities, and the average grain diameter of polytetrafluoroethylene powder is between 3~30 μ m.
Then, white fused alumina put in the liquid phenolic resin soak into, stir fully, make the particle surface of white fused alumina adhere to liquid phenolic resin fully.After soaking into fully, phenol-formaldehyde resin powder, ice crystal and polytetrafluoroethylene powder are mixed with white fused alumina, continue simultaneously to stir, fully mix until three kinds of raw materials.
Mixed feed particles is sieved, and the sieve aperture of sieve is 8~12 orders, and the particle that sieves is used for doing molding mass.
Take by weighing and make three required molding mass of resins polishing emery wheel, also can whenever fill out certainly and spread one and take by weighing the required molding mass of another emery wheel again, can grasp flexibly here.Earlier half required molding mass of emery wheel is poured in the mould of make-up machine, spread out and wipe off with instruments such as floating rules, on molding mass, cover above-mentioned glass fibre reinforced sheet subsequently, put into the required molding mass of another half emery wheel again, spread strickling equally out, the required all raw material of such emery wheel is all placed and is finished.
At this completed emery wheel raw material loam cake cope match-plate pattern, entire die is sent in the make-up machine suppressed at last, be pressed into the emery wheel base.
With these independently the emery wheel base separate with filter and aluminium sheet, send in the baking oven and harden, the temperature in the baking oven rises from the room temperature gradient, 10 ℃ every liter insulations 100 minutes, insulation is 360 minutes after being warming up to 180 ℃, air cooling is to room temperature then.Take out, promptly obtain the emery wheel finished product.
Embodiment 2
The resin polishing emery wheel that present embodiment will prepare is cymbals molding sand wheel, as shown in Figure 2.
Equally, at first prepare burden, raw material type and parts by weight thereof are respectively 90 parts of white fused aluminas, 6 parts of liquid phenolic resins, 20 parts of phenol-formaldehyde resin powders, 2 parts of ice crystals, 5 parts of polytetrafluoroethylene powders, 2 parts of carbon blacks.
Then, adopt with the identical mode batch mixing of first embodiment, sieve.
The forming step of cymbals molding sand wheel is slightly different with the forming step of parallel grinding wheel.Equally for example three emery wheels of one-shot forming take by weighing three parts of molding mass earlier, and every part just equals or be slightly more than to make the weight that emery wheel is required.Equally in mould earlier the shop go into the moiety molding mass and shakeout, the lid reinforced sheet repaves other moiety molding mass and shakeouts, promptly the raw material of an emery wheel are laid and are finished, and cover die cap, and mould is pushed compression moulding in the make-up machine, are pressed into the emery wheel idiosome.
The emery wheel idiosome used with the identical shaped aluminium sheet of emery wheel idiosome separate, the upper and lower surface of aluminium sheet has the identical curve form in upper and lower surface with cymbals molding sand wheel.Be because cymbals molding sand wheel have than the straight-type wheel complexity the surface configuration of Duo, add a cover aluminium sheet and be distortion when preventing to harden in order to play a supportive role, guarantee all identical curve forms of maintenance when sclerosis of each emery wheel.
Equally, the emery wheel base after the compression moulding is sent into baking oven sclerosis, baking oven 10 ℃ of insulations of every raising 100 minutes when room temperature rises to 110 ℃, 110 ℃ rise to 120 ℃ after insulation 200 minutes, 10 ℃ of insulations of 120 ℃ of every raisings when rising to 200 ℃ 100 minutes.Take out, promptly get the emery wheel goods.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technical staff of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used terms such as emery wheel, filter, reinforced sheet, aluminium sheet morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; They are construed to any additional restriction all is contrary with spirit of the present invention.

Claims (5)

1. the preparation method of a resin polishing emery wheel is characterized in that, comprises the steps:
Batching: take by weighing raw material, described raw material and weight proportion thereof are 90~105 parts of white fused aluminas, 2~8 parts of liquid phenolic resins, 6~25 parts of phenol-formaldehyde resin powders, 1~10 part of ice crystal, 1~5 part of polytetrafluoroethylene powder;
Batch mixing: earlier white fused alumina is put into liquid phenolic resin and soak into, then the white fused alumina after phenol-formaldehyde resin powder, ice crystal and polytetrafluoroethylene powder and the infiltration is evenly mixed;
Sieve: the feed particles that batch mixing obtains is screened by sieve, be used for the molding mass of moulding by the i.e. conduct of particle in 8~12 mesh sieve holes;
Moulding: take by weighing the molding mass of approrpiate wts, put it in the mould and shakeout, and put into reinforced sheet make described reinforced sheet flatly imbed described molding mass fully in molding mass, compression moulding obtains the emery wheel base, and molding mass promptly solidify to form grinding body; The weight of described molding mass is the weight of the required molding mass of a plurality of emery wheels, the molding mass that is used for an emery wheel of moulding is paved with and shakeouts the bonnet upper filter, put into the molding mass of another emery wheel of moulding again, thereby rely on filter that the molding mass of different emery wheels is separated fully, all imbedded reinforced sheet in the molding mass of each emery wheel; Described resin polishing emery wheel is cymbals molding sand wheel, in forming step, every part is used for filter in molding mass upper berth of an emery wheel of moulding and presses aluminium sheet with the same shape of emery wheel on filter, and then place same shop filter behind the molding mass of another emery wheel of moulding and add aluminium sheet with the same shape of emery wheel, successively after the circulation for several times, mold cavity fills up substantially, and integral body is sent into compression moulding in the make-up machine;
Oven dry: described emery wheel base is dried in baking oven, and the temperature in the baking oven is incubated 5~8 hours and is cooled to room temperature then behind room temperature gradient increased temperature to 175~190 ℃, promptly obtain the emery wheel finished product.
2. preparation method according to claim 1 is characterized in that, in the batching step, described raw material comprises that also weight proportion is 0.5~2 colouring matter, and described colouring matter is Fe 2O 3And/or carbon black.
3. preparation method according to claim 1 is characterized in that, in the batching step, described white fused alumina is 24~30 order granularities, and the average grain diameter of described polytetrafluoroethylene powder is between 3~30 μ m.
4. preparation method according to claim 1, it is characterized in that, in the forming step, described reinforced sheet is a glass fiber sheets, and described glass fiber sheets is put into baking oven after by glass fabric coated on both sides phenolic resins and toasted under 110~130 ℃ of temperature and made in 1~10 minute.
5. preparation method according to claim 1, it is characterized in that in the baking step, described gradient increased temperature is that every raising is incubated 100 minutes for 10 ℃ when room temperature rises to 110 ℃, 110 ℃ rise to 120 ℃ after insulation 200 minutes, 10 ℃ of insulations of 120 ℃ of every raisings when rising to 175~190 ℃ 100 minutes.
CN 201110329228 2011-10-20 2011-10-20 Resin grinding wheel and manufacturing method thereof CN102363287B (en)

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