CN100377838C - Cube boron nitride internal abrasive wheel and it protuction method - Google Patents
Cube boron nitride internal abrasive wheel and it protuction method Download PDFInfo
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- CN100377838C CN100377838C CNB2005100178024A CN200510017802A CN100377838C CN 100377838 C CN100377838 C CN 100377838C CN B2005100178024 A CNB2005100178024 A CN B2005100178024A CN 200510017802 A CN200510017802 A CN 200510017802A CN 100377838 C CN100377838 C CN 100377838C
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- boron nitride
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Abstract
The present invention relates to an internal grinding wheel made from cubic boron nitride for mechanical machining and a method for producing the internal grinding wheel, which effectively solves the problems existing in machining and grinding of high-speed steel parts of air conditioners and refrigerator compressors. The grinding wheel is formed by that an adhesive layer is arranged on the outer vertical surface of a metallic cylindrical basal body, and a ring-shaped cylinder body made from cubic boron nitride is bonded on the adhesive layer. The producing method comprises the following steps in order: preparing mixed materials, molding, drying, sintering, testing, shaping, bonding, hardening, machining, checking, warehousing and packing. The internal grinding wheel of the present invention has the advantages of high hardness and toughness of product, high strength at high temperature, favorable abrasion resistance, wide purpose, long service life, simple manufacturing process, easy production, good quality of machined parts, high efficiency, low cost and broad application market. The method of the present invention develops a novel way for grinding metallic parts and has great economic and social benefits.
Description
One, technical field
The present invention relates to a kind of production method (cubic boron nitride abbreviates CBN as, and is as follows) of the interior circle of cubic boron nitride emery wheel of hardware abrasive machine processing usefulness.
Two, background technology
Raising along with people's life and economic condition, air-conditioning, refrigerator are for extensively using it, and all exigent precision such as the bent axle of the core component refrigeration compressor of air-conditioning, refrigerator, roller bearing, slide block, upper and lower covers, and used material generally all is difficult grind materials such as high-speed steel.The grinding tool working (machining) efficiency that former employing carborundum, corundum are made is low, and finishing is frequent, and roughness is difficult to reach requirement, the compressor noise of producing is big, life-span is short, and the cost height adopts the imported compressor price high, being difficult to people accepts, particularly along with the fast development of science and technology, the continuous appearance of new material, the machining scope constantly enlarges, it is higher that crudy requires, so how solve machining high-quality, high accuracy, high efficiency, need cheaply?
Three, summary of the invention
At above-mentioned situation, the present invention's purpose just provides the interior production method of justifying emery wheel of cubic boron nitride that a kind of machining is used, effectively solve air-conditioning, this emery wheel of processing grinding problem of freezer compressor high-speed steel parts is on the outer vertical plane of round metal cylindricality matrix tack coat to be arranged, be bonded with the cubic boron nitride circle ring column on the tack coat, its production method is, mixing material-moulding-drying-sintering-test-shaping-bonding-sclerosis-processing-check warehouse-in-packing, product hardness of the present invention is big, toughness is big, the elevated temperature strength height, and wearability is good, purposes is wide, life-span is long, and technology is simple, easily produces, processing component quality height, the efficient height, cost is low, and application market is wide, opened up the new way of metal parts grinding, huge economic and social benefit has been arranged.
Four, description of drawings
Fig. 1 is the structural profile front view of product of the present invention.
Fig. 2 is the vertical view of product of the present invention.
Fig. 3 is the technological process of production figure of product of the present invention.
Five, the specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.
Provide by Fig. 1, the circle emery wheel is on the cylindrical metal matrix 1 outer vertical plane tack coat 2 to be arranged in the cubic boron nitride of the present invention, be bonded with cubic boron nitride circle ring column 3 on the tack coat 2, this product can optionally be made series of products, circle ring column 3 diameters are generally 15-45mm, high (or long) is 16-70mm, and metallic matrix 1 diameter is 8-25mm, and tack coat 2 is sticking being contained on metallic matrix 1 outer wall that circle ring column 3 is firm.
Its production method is, as shown in Figure 3, becomes required cylindrical metal matrix 1 standby with machined on request metallic matrix; The production method of cubic boron nitride circle ring column 3 and tack coat 2 is, at first makes cubic boron nitride circle ring column 3, first mixing material, and its material proportioning is by weight percentage:
Cubic boron nitride 45.2%, dextrine powder 1.8%, white fused alumina 28.5%, wetting agent 4.1%, walnut shell powder 1.8%, bond 18.6%, total amount are 100%.
Wherein bond can be silica or alundum (Al or lithia or magnesia; Wetting agent is formulated by the dextrine powder that adds 1g in every 200g water.All solid compositions all are manufactured or commercially available powders in the component.
200/230 during with the coarse fodder wet mixing, behind cubic boron nitride and white fused alumina mixing, adding wetting agent fully mixes, every sand grains is all soaked into by wetting agent, what and thickness decision mixing time length according to material, material about general 500 grams need stir 40 minutes, added bond then, dextrine powder, walnut shell powder firmly carries out abundant stirring and evenly mixing, simultaneously will be through hairbrush cleaning batch mixing instrument (as mortar) commonly used, 500 gram batch mixings stir generally and need 40 minutes, and are the same substantially with the wet mixing time, after being mixed, cross sieve 30-60 number, pack into standby in the bag (preferably weigh up weight, labelled, write granularity and time etc. exactly); If 230/270 during with the fines wet mixing, earlier cubic boron nitride, white fused alumina, bond, walnut shell powder, dextrine powder are mixed, the time of being mixed is 40-100 minute, add wetting agent then, mix and stirred 40-100 minute, after 60-80 number sieve, standby in the bag of packing into;
Behind the mixing material, select required mould, batch mixing packed into carry out moulding in the mould, charging answers gradation to carry out, and generally wants 3-5 time, to stir, wipe off, smash material when feeding intake, to need not to smash material for the last time by gently evenly carrying out at leisure when smashing material, adopt assembling die as mould to heavy, when forming tank abrasive stick and six squares, must smash material; Emery wheel as several specifications of one-shot forming, to carry out in proper order by the granularity moulding from fine to coarse of emery wheel, and decide the number of times that feeds intake according to the height (being the length of cubic boron nitride annulus plastochondria) of emery wheel, and select suitable mould cushion block, ordinary circumstance, during emery wheel height H=15-30mm, pad thickness h=1.5-2.5mm; During H=31-55mm, h=2.6-4mm;
Cubic boron nitride circle ring column 3 after the moulding places and carries out drying in the baking box, if but after little emery wheel adopts groove abrasive stick and six square moulding the same day carry out the classification drying, its baking temperature is 40-140 ℃, the cumulative time is 8 hours, specifically sees the following form:
Drying curve 1:
| Temperature (℃) | 40 | ?60 | ?80 | ?100 | ?120 | ?140 |
| Time (h) | 1 | ?1 | ?2 | ?2 | ?1 | ?1 |
Inside and outside first bistrique when outer diameter D＞30mm, needs coolly carry out drying again after 24 hours, and dry classification carries out, and baking temperature 40-140 ℃, 11 hours cumulative times, specifically sees the following form:
Drying curve 2:
| Temperature (℃) | 40 | 60 | 80 | 100 | 120 | 140 |
| Time (h) | 2 | 2 | 2 | 2 | 1 | 2 |
After baking oven (drying box) temperature is reduced to below 40 ℃, take out dried emery wheel body, promptly the cubic boron nitride circle ring column 3;
Pack into cellar for storing things and burn in the stove and carry out sintering of emery wheel body after dry good, during sintering, refractory slab is wanted smooth no big particle, and placing sand will spread evenly, and all CBN goods evenly spread one deck placing sand after setting level and putting in order again on goods; The small abrasive nose emery wheel must all bury sand; Camshaft wheel piece and similar articles need be placed on and put on the corresponding emery wheel neatly.Refractory slab and CBN goods will be put into high temperature furnace reposefully, cause moving and dislocation of CBN goods to avoid colliding.CBN goods diameter is when 25mm is following, and temperature is 100-770 ℃, divides 12 grades of sintering, and the cumulative time is 8 hours 35 minutes, sees following table for details:
| Temperature (℃) | 100 | ?150 | ?200 | ?250 | ?300 | ?350 | ?400 | ?450 | ?500 | ?600 | ?700 | ?770 |
| Time (min) | 40 | ?40 | ?40 | ?40 | ?40 | ?40 | ?40 | ?40 | ?60 | ?45 | ?45 | ?45 |
During CBN goods diameter of phi 〉=30mm, temperature is 100-770 ℃, divides 13 grades of sintering, and the cumulative time is 9 hours 45 minutes, sees following table for details:
| Temperature (℃) | 100 | ?150 | ?200 | ?250 | ?300 | ?350 | ?400 | ?450 | ?500 | ?550 | ?620 | ?680 | ?770 |
| Time (min) | 50 | ?50 | ?50 | ?50 | ?50 | ?50 | ?50 | ?50 | ?50 | ?50 | ?50 | ?50 | ?50 |
After sintering, through test, comprise that weight, size, intensity are qualified after, carry out shaping again, make it to meet the body requirement, the emery wheel body that metallic matrix and (CBN) cubic boron nitride are made bonds then, and it is become one, bonding specifically:
1, is ready to bonding mold, adjusts size, carry out the preliminary preparation of bonding;
2, after the matrix passed examination, carry out sandblast, cleaning, put oven drying, baking temperature is at 55-60 ℃;
3, CBN emery wheel body is carried out detailed inspection after, carry out sandblast (depending on the circumstances), cleaning, drying, baking temperature 55-60 ℃;
4, earlier adhesive glue is carried out preheating, temperature is not higher than 60 ℃, its glue can be commercially available two-in-one adhesive or cementing agent, ratio impregnation in strict accordance with 1: 1, and in glue, add 6% filler of glue weight, and filler is to be made by white fused alumina, walnut shell powder, bond, dextrine powder, proportioning is: 28.5 parts of white fused aluminas, 1.8 parts of walnut shell powders, 1.8 parts of 18.6 parts of bonds and dextrine powders.After fully transferring evenly, can carry out bonding.
5, bonding goods, at room temperature place 1-2 hour after, put into baking oven again and harden, hardening temperature is 55-60 ℃; Firm time 12 hours.Goods after the sclerosis carry out fining-off again through testting qualified goods, can check warehouse-in afterwards, pack (usefulness) for sale.
Product of the present invention detects through the quality testing department of national authority, and its quality meets or exceeds required standard fully, bistrique surface flawless, and pit, foaming and above length and width are greater than the tipping of 0.5mm, and the dimensional discrepancy of bistrique all meets the requirements, and sees the following form:
| Emery wheel body diameter | Emery wheel body length (height) | The metallic matrix diameter | |||
| Basic size | Limit deviation | Basic size | Limit deviation | Basic size | Limit deviation |
| ?4-24mm | +0.15mm 0 | ?3-25mm | +0.15mm 0 | ?3-18mm | +0.14mm 0 |
| ?＞24-50mm | +0.25mm 0 | ?＞25-75mm | +0.20mm 0 | ?＞18-40mm | +0.18mm 0 |
The grinding tool grinding is sharp, and anti-wear performance is good, and the unit wear extent is minimum. Grinding ratio during the grinding steel is 4000-10000, is 120-150 times of conventional abrasive material high speed abrasive material, and the durability of grinding workpiece improves 30-50%, and through on probation, product cubic boron nitride abrasive wheel of the present invention also has following outstanding advantage:
1, cubic boron nitride is to ferrous metal, and particularly hardness is large, and toughness is large, and elevated temperature strength is high, and the material that pyroconductivity is low has good grinding performance, and its metal material removal rate is adamantine 10 times, has solved the processing problems of hard and tough difficult grind material.
2, same grinding tool can the grinding different materials, and the different size workpiece needn't be changed grinding tool, lathe parameter, processing conditions needn't often change, and the grinding tool life-span is long, be specially adapted to many kinds, in, the production of small lot grinding tool and CNC, FMS, CIM and FA processing uses.
3, surface quality is improved, and general flawless is difficult for burn, and can obtains residual compressive stress, improves the fatigue strength of workpiece significantly.
4, the grinding of cubic boron nitride grinding tool keeps dimensional accuracy easily, the more important thing is that its thermal conductivity is more much bigger than corundum, thereby grinding heat can be derived rapidly, reduces the workpiece thermal deformation.
Though 5, cubic boron nitride initial cost height, little because of wearing and tearing, the life-span is long, the efficient height, and the grinding tool cost of sharing each workpiece is lower than common grinding tool on the contrary.
China is from the nineties, and the compressor industry is more and more recognized the necessity that adopts the CBN emery wheel.Present most of compressor is by the processing of CBN wheel grinding, but because development cost are higher, and technical difficulty is big, domestic big multiple enterprises does not have capability development production, can't meet the need of market.Used most of emery wheel is from company's imports such as Mitsui, Mitsubishis at present.The nearly 10 hundreds of millions yuan foreign exchange of annual cost, and because of cause influence such as cost an arm and a leg CBN emery wheel applying of compressor industry at home.Therefore, of the present invention succeeding in developing must be made outstanding creative contribution for air-conditioning, refrigerator production and high-speed steel parts cheapness, efficient, high-quality grinding, starts the wide world that emery wheel is produced, and produces huge economic and social benefit.
Claims (4)
1. the production method of circle emery wheel in the cubic boron nitride, it is characterized in that, metallic matrix is processed into cylindrical metal matrix (1), again cubic boron nitride circle ring column (3) is bonded in the outside of cylindrical metal matrix (1) through tack coat, cubic boron nitride circle ring column (3) is made according to the following steps: first mixing material, its material proportioning is by weight percentage: cubic boron nitride 45.2%, dextrine powder 1.8%, white fused alumina 28.5%, wetting agent 4.1%, walnut shell powder 1.8%, bond 18.6%, total amount is 100%, 200/230 during with the coarse fodder wet mixing, behind cubic boron nitride and white fused alumina mixing, adding wetting agent fully mixes, every sand grains is all soaked into by wetting agent, and the material of 500 grams need stir 40 minutes, added bond then, dextrine powder, walnut shell powder, firmly carry out abundant stirring and evenly mixing, with hairbrush cleaning batch mixing instrument, 500 gram batch mixings stirred 40 minutes, after being mixed simultaneously, cross sieve 30-60 number, standby in the bag of packing into; 230/270 during with the fines wet mixing, earlier cubic boron nitride, white fused alumina, bond, walnut shell powder, dextrine powder is mixed, and the time of being mixed is 40-100 minute, add wetting agent then, mix and stirred 40-100 minute, after 60-80 number sieve, standby in the bag of packing into;
Behind the mixing material, batch mixing packed into carry out moulding in the mould, charging should divide to be carried out for 3-5 time, to stir, wipe off, smash material when feeding intake, evenly carry out at leisure to heavy by light when smashing material, cubic boron nitride circle ring column (3) after the moulding places baking box internal classification drying, and baking temperature is 40-140 ℃, and the cumulative time is 8 hours; During external diameter＞30mm, coolly carried out drying again after 24 hours, dry classification carries out, and baking temperature 40-140 ℃, 11 hours cumulative times; After oven temperature is reduced to below 40 ℃, take out the cubic boron nitride circle ring column; Cubic boron nitride circle ring column after dry good is packed into and is carried out sintering in the cellar for storing things, during sintering, refractory slab is wanted smooth no big particle, placing sand will spread evenly, evenly spread one deck placing sand after the CBN goods are set level again on goods, the diameter of CBN goods is when 25mm is following, and temperature is 100-770 ℃, divide 12 grades of sintering, the cumulative time is 8 hours 35 minutes; During the diameter Ф of CBN goods 〉=30mm, temperature is 100-770 ℃, divide 13 grades of sintering, cumulative time is 9 hours 45 minutes, after sintering, carry out shaping, the cubic boron nitride circle ring column that cylindrical metal matrix and cubic boron nitride are made bonds then, it is become one, bonding is carried out according to the following steps: the cylindrical metal matrix is carried out sandblast, clean, put oven drying, baking temperature is at 55-60 ℃, the cubic boron nitride circle ring column carries out sandblast, clean, dry, baking temperature 55-60 ℃, earlier bonding is carried out preheating with glue, temperature is not higher than 60 ℃, and in glue, add 6% filler of glue weight, make tack coat (2), cylindrical metal matrix (1) and cubic boron nitride circle ring column (3) bonded together by tack coat, put at room temperature place 1-2 hour after, put into baking oven again and harden, hardening temperature is 55-60 ℃; Firm time 12 hours.
2. the production method of circle emery wheel is characterized in that in the cubic boron nitride according to claim 1, and said filler is by the weight meter: 28.5 parts of white fused aluminas, and 1.8 parts of walnut shell powders, 18.6 parts of bonds and dextrine powder are made for 1.8 parts.
3. the production method of circle emery wheel is characterized in that said bond is silica or alundum (Al or lithia or magnesia in the cubic boron nitride according to claim 1.
4. the production method of circle emery wheel is characterized in that in the cubic boron nitride according to claim 1, and said wetting agent is to be made by the dextrine powder that adds 1g in every 200g water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100178024A CN100377838C (en) | 2005-07-19 | 2005-07-19 | Cube boron nitride internal abrasive wheel and it protuction method |
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| CNB2005100178024A CN100377838C (en) | 2005-07-19 | 2005-07-19 | Cube boron nitride internal abrasive wheel and it protuction method |
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| CN1724218A CN1724218A (en) | 2006-01-25 |
| CN100377838C true CN100377838C (en) | 2008-04-02 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363289A (en) * | 2011-11-17 | 2012-02-29 | 广东奔朗新材料股份有限公司 | Preparation technology of metal ceramic bonding agent diamond/ cubic boron nitride (CBN) grinding wheel |
| CN102814751B (en) * | 2012-07-31 | 2015-09-30 | 安徽威铭耐磨材料有限公司 | A kind of vitrified CBN wheel being mixed with PVC resin powder |
| CN109531446A (en) * | 2018-11-09 | 2019-03-29 | 郑州磨料磨具磨削研究所有限公司 | A kind of vitrified bond utilizes the preparation method of its obtained ceramic bond diamond contact roller for dressing and the idler wheel |
| CN110052974A (en) * | 2019-05-09 | 2019-07-26 | 华侨大学 | A kind of alusil alloy bonding agent cubic boron nitride emery wheel and its manufacturing method |
| CN110509198A (en) * | 2019-07-12 | 2019-11-29 | 郑州磨料磨具磨削研究所有限公司 | A kind of inner circle grinding abrasive disk processing method and pre-processing devices |
| CN113321941A (en) * | 2021-07-06 | 2021-08-31 | 刘永忠 | Foaming method of high-efficiency grinding head |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4713914A (en) * | 1985-01-29 | 1987-12-22 | Seiko Seiki Kabushiki Kaisha | Internal grinding method |
| CN2041229U (en) * | 1988-07-24 | 1989-07-19 | 国营汉江工具厂 | Repair device for cbn abrasive wheel |
| CN1063437A (en) * | 1990-12-20 | 1992-08-12 | 辛辛那提米勒克朗公司 | Make the method and the prepared emery wheel of vitrified bonded grinding wheel |
| CN2820443Y (en) * | 2005-07-19 | 2006-09-27 | 郑州富莱特超硬磨具有限公司 | Cylinderical cubic boron nitride sand wheel |
-
2005
- 2005-07-19 CN CNB2005100178024A patent/CN100377838C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4713914A (en) * | 1985-01-29 | 1987-12-22 | Seiko Seiki Kabushiki Kaisha | Internal grinding method |
| CN2041229U (en) * | 1988-07-24 | 1989-07-19 | 国营汉江工具厂 | Repair device for cbn abrasive wheel |
| CN1063437A (en) * | 1990-12-20 | 1992-08-12 | 辛辛那提米勒克朗公司 | Make the method and the prepared emery wheel of vitrified bonded grinding wheel |
| CN2820443Y (en) * | 2005-07-19 | 2006-09-27 | 郑州富莱特超硬磨具有限公司 | Cylinderical cubic boron nitride sand wheel |
Non-Patent Citations (2)
| Title |
|---|
| CBN砂轮在内圆磨削中的应用. 徐载熊，顾超.金刚石与磨料磨具工程，第5期. 1990 * |
| CBN砂轮的使用与维护. 安立宝，张桂木，杨玉海.机械制造，第11期. 1996 * |
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Owner name: HENAN FLINT SUPERHARD ABRASIVES CO., LTD. Free format text: FORMER OWNER: FULAITE SUPERHARD GRINDER CO., LTD., ZHENGZHOU Effective date: 20081107 |
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Effective date of registration: 20081107 Address after: No. 12 Yulan street, hi tech Zone, Henan, Zhengzhou Patentee after: Henan Flint Superhard Abrasives Co., Ltd Address before: No. 32, Ruida Road, hi tech Zone, Henan, Zhengzhou Patentee before: Fulaite Superhard Grinding Co., Ltd., Zhengzhou |
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