CN101513728B - Composite grain diamond grinding wheel for UO2 pebble grinding device - Google Patents
Composite grain diamond grinding wheel for UO2 pebble grinding device Download PDFInfo
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- CN101513728B CN101513728B CN2009101193886A CN200910119388A CN101513728B CN 101513728 B CN101513728 B CN 101513728B CN 2009101193886 A CN2009101193886 A CN 2009101193886A CN 200910119388 A CN200910119388 A CN 200910119388A CN 101513728 B CN101513728 B CN 101513728B
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- Prior art keywords
- diamond
- grinding
- district
- skive
- composite grain
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- 238000000227 grinding Methods 0.000 title claims abstract description 105
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 79
- 239000010432 diamond Substances 0.000 title claims abstract description 79
- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 239000008188 pellet Substances 0.000 claims description 37
- 239000000853 adhesive Substances 0.000 claims description 20
- 230000001070 adhesive effect Effects 0.000 claims description 20
- 230000004323 axial length Effects 0.000 claims description 8
- 229910001651 emery Inorganic materials 0.000 claims description 8
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 150000002367 halogens Chemical class 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 238000005498 polishing Methods 0.000 abstract description 5
- 239000010410 layer Substances 0.000 abstract 2
- 239000000758 substrate Substances 0.000 abstract 2
- 239000012790 adhesive layer Substances 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 239000000919 ceramic Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 239000003758 nuclear fuel Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 229910010271 silicon carbide Inorganic materials 0.000 description 4
- 239000002893 slag Substances 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention relates to a composite grain diamond grinding wheel for UO2 pebble grinding device, comprising a grinding wheel substrate. An adhesive layer and a diamond layer are orderly arranged around the grinding wheel substrate from the internal to the external. The diamond layer is divided into a coarse grinding area and a fine grinding area along the composite diamond grinding spindle according to the difference of the diamond grain, wherein, the length ratio between the coarse grinding area and the fine grinding area is 1:(2-4), the diamond grain of the coarse grinding area is 80/100-170/200, and the diamond grain of the fine grinding area is 170/200-270/325. According to the invention, the composite grain diamond grinding wheel integrates coarse grinding, fine grinding and polishing of the UO2 pebble, achieves the UO2 pebble abrasive machining only by one grinding device and one step, in addition, the processing quality is stable, the cost is low.
Description
Technical field
The present invention relates to a kind of ceramic UO of the pure level of nuclear of reactor nuclear fuel element manufacturing usefulness
2The pellet mill turning device is specifically related to a kind of UO
2Pellet mill turning device composite grain skive.
Background technology
Pressurized water reactor and heavy water reactor are that present international nuclear power station develops comparative maturity and adopts maximum nuclear reactor types, and in the majority with the pressurized water reactor type nuclear power station.These two kinds of nuclear power plant reactor types all adopt the ceramic mould fuel element, promptly with the ceramic UO of the pure level of nuclear
2A kind of fuel element that pellet is made as core body.Examine the ceramic UO of pure level
2Pellet mainly adopts the pure level of nuclear UO
2Powder is as raw material, a kind of cylindrical ceramic pellet of making through powder pressing forming, sintering.Because will going into heap, uses the nuclear power fuel element, for security of operation and the economy that guarantees reactor, nuclear fuel element design and workmanship require relatively stricter, and the nuclear fuel element amount of going into the heap use every year is bigger, in order to satisfy nuclear fuel element suitability for industrialized production needs, the UO that comes out through overmolding, sintering
2Pellet also must carry out grinding, to guarantee the dimension precision requirement of pellet, satisfies fuel element and produces needs in batches.
What all adopt both at home and abroad at present, is that two or three grinding machines divide multiple working procedures such as corase grind, correct grinding, polishing mill to finish UO
2The grinding of pellet, and the grinding tool that grinding machine is used is to select the carborundum resin bond wheel that price is more expensive, durability is not good for use.This UO
2The shortcoming of pellet grinding process is complex process, equipment purchase expense height, and the equipment operation easier is big, UO
2Pellet grinding quality instability, and the grinding slag mud that produces is recycled the cost height.Though in recent years, the external and domestic skive that also adopted had been replaced the carborundum resin bond wheel, and grinding process still will be divided into corase grind, correct grinding two procedures, and technological process is long, influences production cost and economic benefit.Fig. 1 and Fig. 2 are the UO that adopts at present
2Pellet mill turning device structural representation, this UO
2The pellet mill turning device comprises four parts compositions such as emery wheel 1, guide wheel 2, supporting plate 4 and guide plate 5, and its medium plain emery wheel 1 is the carborundum resin bond wheel.
Summary of the invention
The object of the present invention is to provide a kind of can be with existing UO
2Pellet corase grind, correct grinding, polishing mill integrate, and realize UO by grinding attachment one procedure
2Pellet grinding, and stable processing quality, UO that cost is low
2Pellet mill turning device composite grain skive.
Realize the technical scheme of the object of the invention: a kind of UO
2Pellet mill turning device composite grain skive, it comprises grinding wheel base body, is provided with adhesive phase and diamond layer from the inside to the outside successively along the grinding wheel base body circumference; Described diamond layer is divided into corase grind district and correct grinding district along the composite diamond grinding wheel spindle to the difference by the diamond granularity, the length ratio in the length in corase grind district and correct grinding district is 1: (2～4), the diamond grit in corase grind district is 80/100～170/200, and the diamond grit in correct grinding district is 170/200～270/325.
Aforesaid a kind of UO
2Pellet mill turning device composite grain skive, its described composite grain skive outside diameter is at φ 400mm～φ 700mm, and diameter of bore is at φ 280mm～φ 320mm; Wherein adhesive phase thickness is 2mm～8mm, and diamond layer thickness is 3mm～10mm.
Aforesaid a kind of UO
2Pellet mill turning device composite grain skive, its described composite grain skive axial length is 150mm～250mm, and the length in diamond layer corase grind district is 50mm～80mm, and the length in correct grinding district is 100mm～200mm.
Aforesaid a kind of UO
2Pellet mill turning device composite grain skive, the diamond that its described diamond layer adopts is a MBD type diamond, concentration is 75%～150%; The adhesive that described adhesive phase adopts is a metallic bond.
Effect of the present invention is: UO provided by the present invention
2Pellet mill turning device composite grain skive, it mainly is a skive of having replaced original carborundum resin bond wheel or a kind of size distribution with the composite grain skive, with original UO compared with prior art
2Pellet corase grind, correct grinding, polishing mill integrate, and finish UO by grinding attachment one procedure
2The pellet grinding.Because composite grain skive of the present invention is installed to UO
2Behind the pellet mill turning device, to UO
2When pellet carries out grinding, realized that successfully grinding machine of a procedure (corase grind and correct grinding carry out together) finishes UO
2Pellet grinding operation, to need originally equipment purchase expense that three grinding machines of three process (corase grind, correct grinding, polishing mill) finish the grinding operation surplus 120 ten thousand yuan be reduced to 40 surplus ten thousand yuan, saved the large number quipments procurement payment, shortened original grinding operation simultaneously, operating personnel have been reduced, improve production efficiency, reduced the processing cost of product, obtained good economic benefits.Because the grinding machine grinding tool adopts composite grain skive of the present invention, the grinding accuracy height, steady quality (roughness Ra≤0.8 μ m, circularity≤0.003mm, cylindricity≤0.003mm), production efficiency height (per minute can grinding pellet 70～120), emery wheel is durable in use, consume for a short time, the grinding slag mud of generation can directly be recycled, and has solved former grinding slag mud and has recycled the high problem of cost.
Description of drawings
Fig. 1 is UO in the prior art
2Pellet mill turning device structural representation;
Fig. 2 is UO in the prior art
2Pellet mill turning device side view;
Fig. 3 is a composite grain skive structural representation of the present invention;
Fig. 4 is a composite grain boart boart size of wheel schematic diagram of the present invention;
Among the figure: 1. emery wheel; 2. guide wheel; 3. workpiece; 4. supporting plate; 5. guide plate; 6. diamond layer; 7. emery wheel adhesive phase; 8. grinding wheel base body; I. corase grind is distinguished; II. correct grinding is distinguished.
The specific embodiment
Below in conjunction with the drawings and specific embodiments to UO of the present invention
2The pellet mill turning device is further described with the composite grain skive.
As shown in Figure 3 and Figure 4, UO of the present invention
2Pellet mill turning device composite grain skive comprises grinding wheel base body 8, is provided with adhesive phase 7 and diamond layer 6 from the inside to the outside successively along grinding wheel base body 8 circumference.Diamond layer 6 is divided into corase grind district I and correct grinding district II along the composite diamond grinding wheel spindle to the difference by the diamond granularity.The ratio of the length L 2 of the length L 1 of corase grind district I and correct grinding district II is 1: 2, and the diamond grit of corase grind district I is 80/100, and the diamond grit of correct grinding district II is 170/200.Composite grain skive outside diameter D is at φ 400mm, and diameter of bore is at φ 280mm.Adhesive phase 7 thickness are 2mm; Diamond layer 6 thickness are 3mm.Composite grain skive axial length L is 150mm, and the length L 1 of diamond layer corase grind district I is 50mm, and the length L 2 of correct grinding district II is 100mm.The diamond that diamond layer 6 adopts is a MBD type diamond, and concentration is 75%; The adhesive that described adhesive phase 7 adopts is a metallic bond, does not contain Si, Ag, three kinds of elements of B and halogen (technology that this area is general) in the metal-to-metal adhesive; Grinding wheel base body 10 adopts aluminium base (can adopt the matrix of other materials according to user's request).
The outside diameter D of above-mentioned composite grain skive 1, diameter of bore and length L are selected, and can wait and select according to the centreless grinding machine external main shaft size, the pellet diameter that are adopted.
With the UO shown in Fig. 1 and Fig. 2
2Pellet mill turning device medium plain emery wheel 1 replaces with above-mentioned composite grain skive, grinding attachment is installed to (standard device on the centreless grinding machine external then, can select model specification to be: MG10100 type, M10100 type), the composite grain skive is connected with grinding machine spindle, drive the generation driving force by grinding machine spindle, guide wheel 2 is connected with grinding machine guide wheel main shaft, and supporting plate 4 and guide plate 5 are all according on the grinding machine frame or on the special bracket system; In order to realize grinder automatic loading and unloading, can be furnished with an automatic upper and lower materials device, can make workpiece 3 realize automatic grinding, improve the grinding operating efficiency, if UO
2The pellet manufacturing batch is little, also can use manual feeding device.Guide wheel 2, supporting plate 4 and guide plate 5 all adopt existing parts.Workpiece 3 is a ceramic body, and main component is UO
2
When above-mentioned grinding attachment grinding, workpiece 3 utilizes the guide effect of guide plate 5 to enter the grinding area that composite grain emery wheel, supporting plate 4 and guide wheel 2 threes form.Guide wheel 2 at first drives workpiece 3 and carries out grinding at the corase grind district of composite grain skive I, and workpiece 3 sizes reach specification requirement substantially after corase grind district's grinding; It is very little to enter behind the correct grinding district II stock removal of workpiece 3, and it mainly carries out fine finishining to improve workpiece 3 apparent masses (fineness) to surface of the work.In the grinding process, grinding coolant adopts casting, and washing processing part surface is so that heat and the grindstone dust that produces when taking away grinding, prevents from that grindstone dust from flying away to pollute working environment in the air.
Its difference from Example 1 is: the ratio of the length L 2 of the length L 1 of corase grind district I and correct grinding district II is 1: 3, and the diamond grit of corase grind district I is 100/120, and the diamond grit of correct grinding district II is 200/230.Composite grain skive outside diameter D is at φ 500mm, and diameter of bore is at φ 290mm.Adhesive phase 7 thickness are 4mm; Diamond layer 6 thickness are 5mm.Composite grain skive axial length L is 240mm, and the length L 1 of diamond layer corase grind district I is 60mm, and the length L 2 of correct grinding district II is 180mm.The diamond that diamond layer 6 adopts is a MBD type diamond, and concentration is 100%.
Its difference from Example 1 is: the ratio of the length L 2 of the length L 1 of corase grind district I and correct grinding district II is 1: 4, and the diamond grit of corase grind district I is 140/170, and the diamond grit of correct grinding district II is 230/270.Composite grain skive outside diameter D is at 600mm, and diameter of bore is at φ 300mm.Adhesive phase 7 thickness are 6mm; Diamond layer 6 thickness are 7mm.Composite grain skive axial length L is 250mm, and the length L 1 of diamond layer corase grind district I is 50mm, and the length L 2 of correct grinding district II is 200mm.The diamond that diamond layer 6 adopts is a MBD type diamond, and concentration is 120%.
Its difference from Example 1 is: the ratio of the length L 2 of the length L 1 of corase grind district I and correct grinding district II is 1: 3, and the diamond grit of corase grind district I is 170/200, and the diamond grit of correct grinding district II is 270/325.Composite grain skive outside diameter D is at φ 700mm, and diameter of bore is at φ 320mm.Adhesive phase 7 thickness are 8mm; Diamond layer 6 thickness are 10mm.Composite grain skive axial length L is 200mm, and the length L 1 of diamond layer corase grind district I is 50mm, and the length L 2 of correct grinding district II is 150mm.The diamond that diamond layer 6 adopts is a MBD type diamond, and concentration is 150%.
Its difference from Example 1 is: the ratio of the length L 2 of the length L 1 of corase grind district I and correct grinding district II is 1: 2, and the diamond grit of corase grind district I is 170/200, and the diamond grit of correct grinding district II is 270/325.Composite grain skive outside diameter D is at φ 500mm, and diameter of bore is at φ 280mm.Adhesive phase 7 thickness are 3mm; Diamond layer 6 thickness are 4mm.Composite grain skive axial length L is 210mm, and the length L 1 of diamond layer corase grind district I is 70mm, and the length L 2 of correct grinding district II is 140mm.The diamond that diamond layer 6 adopts is a MBD type diamond, and concentration is 100%.
Its difference from Example 1 is: the ratio of the length L 2 of the length L 1 of corase grind district I and correct grinding district II is 1: 2, and the diamond grit of corase grind district I is 80/100, and the diamond grit of correct grinding district II is 170/200.Composite grain skive outside diameter D is at φ 450mm, and diameter of bore is at φ 300mm.Adhesive phase 7 thickness are 2mm; Diamond layer 6 thickness are 3mm.Composite grain skive axial length L is 240mm, and the length L 1 of diamond layer corase grind district I is 80mm, and the length L 2 of correct grinding district II is 160mm.The diamond that diamond layer 6 adopts is a MBD type diamond, and concentration is 90%.
In conjunction with the accompanying drawings embodiments of the invention have been done detailed description above, but the present invention is not limited to the foregoing description, in the ken that those of ordinary skills possessed, also can under the prerequisite that does not break away from aim of the present invention, makes various variations.
Claims (4)
1. UO
2Pellet mill turning device composite grain skive is characterized in that: this composite diamond emery wheel comprises grinding wheel base body (8), is provided with adhesive phase (7) and diamond layer (6) from the inside to the outside successively along grinding wheel base body (8) circumference; Described diamond layer (6) is divided into corase grind district (I) and correct grinding district (II) along the composite diamond grinding wheel spindle to the difference by the diamond granularity, the ratio of the length (L2) in the length (L1) in corase grind district (I) and correct grinding district (II) is 1: (2～3), the diamond grit in corase grind district (I) is 140/170～170/200, and the diamond grit in correct grinding district (II) is 200/230～270/325; The adhesive that described adhesive phase (7) adopts is a metallic bond, and do not contain Si, Ag in the metal-to-metal adhesive, three kinds of elements of B and halogen.
2. a kind of UO according to claim 1
2Pellet mill turning device composite grain skive is characterized in that: described composite grain skive outside diameter (D) is at φ 400mm～φ 700mm, and diameter of bore is at φ 280mm～φ 320mm; Wherein adhesive phase (7) thickness is 2mm～8mm, and diamond layer (6) thickness is 3mm～10mm.
3. a kind of UO according to claim 1 and 2
2Pellet mill turning device composite grain skive, it is characterized in that: described composite grain skive axial length (L) is 150mm～250mm, the length (L1) in diamond layer corase grind district (I) is 50mm～80mm, and the length (L2) in correct grinding district (II) is 100mm～200mm.
4. a kind of UO according to claim 1 and 2
2Pellet mill turning device composite grain skive is characterized in that: the diamond that described diamond layer (6) adopts is a MBD type diamond, and concentration is 75%～150%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101193886A CN101513728B (en) | 2009-03-25 | 2009-03-25 | Composite grain diamond grinding wheel for UO2 pebble grinding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101193886A CN101513728B (en) | 2009-03-25 | 2009-03-25 | Composite grain diamond grinding wheel for UO2 pebble grinding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101513728A CN101513728A (en) | 2009-08-26 |
| CN101513728B true CN101513728B (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101193886A Expired - Fee Related CN101513728B (en) | 2009-03-25 | 2009-03-25 | Composite grain diamond grinding wheel for UO2 pebble grinding device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513945A (en) * | 2012-01-06 | 2012-06-27 | 田欣利 | Dual-abrasive diamond grinding wheel for machining external round surface of engineering ceramic |
| CN106271942A (en) * | 2015-05-20 | 2017-01-04 | 蓝思科技股份有限公司 | The contour processing method of sapphire substrate and the emery wheel containing boart boart |
| CN107695901A (en) * | 2017-09-21 | 2018-02-16 | 自贡硬质合金有限责任公司 | A kind of composite molding emery wheel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3802130A (en) * | 1971-05-12 | 1974-04-09 | Edenvale Eng Works | And like grinding wheels |
| CN2403547Y (en) * | 1999-12-25 | 2000-11-01 | 黄计高 | Compound sand wheel |
| JP2001334469A (en) * | 2000-05-29 | 2001-12-04 | Allied Material Corp | Diamond wheel for glass substrate work and working method of glass substrate |
| JP2003285274A (en) * | 2002-01-25 | 2003-10-07 | Mitsui Kensaku Toishi Kk | Grinding wheel using superabrasive grain vitrified grindstone, and manufacturing method for the same |
| CN2611105Y (en) * | 2002-12-26 | 2004-04-14 | 威海蓝旗磨料磨具有限公司 | Multi-layer abrasive tool |
-
2009
- 2009-03-25 CN CN2009101193886A patent/CN101513728B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3802130A (en) * | 1971-05-12 | 1974-04-09 | Edenvale Eng Works | And like grinding wheels |
| CN2403547Y (en) * | 1999-12-25 | 2000-11-01 | 黄计高 | Compound sand wheel |
| JP2001334469A (en) * | 2000-05-29 | 2001-12-04 | Allied Material Corp | Diamond wheel for glass substrate work and working method of glass substrate |
| JP2003285274A (en) * | 2002-01-25 | 2003-10-07 | Mitsui Kensaku Toishi Kk | Grinding wheel using superabrasive grain vitrified grindstone, and manufacturing method for the same |
| CN2611105Y (en) * | 2002-12-26 | 2004-04-14 | 威海蓝旗磨料磨具有限公司 | Multi-layer abrasive tool |
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| Publication number | Publication date |
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| CN101513728A (en) | 2009-08-26 |
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Granted publication date: 20110316 |