GB2067935A - Dressing or shaping grinding wheels - Google Patents
Dressing or shaping grinding wheels Download PDFInfo
- Publication number
- GB2067935A GB2067935A GB8002500A GB8002500A GB2067935A GB 2067935 A GB2067935 A GB 2067935A GB 8002500 A GB8002500 A GB 8002500A GB 8002500 A GB8002500 A GB 8002500A GB 2067935 A GB2067935 A GB 2067935A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grinding wheel
- water
- fluid
- peripheral
- dressing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000007493 shaping process Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 7
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 5
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000005299 abrasion Methods 0.000 claims abstract description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 7
- 239000010432 diamond Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 238000005422 blasting Methods 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 239000002826 coolant Substances 0.000 claims description 2
- 239000010730 cutting oil Substances 0.000 claims description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 2
- 229910001887 tin oxide Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229920001800 Shellac Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 1
- 229940113147 shellac Drugs 0.000 description 1
- 235000013874 shellac Nutrition 0.000 description 1
- 239000004208 shellac Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/007—Cleaning of grinding wheels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
A method and apparatus for dressing, trueing or shaping the peripheral and/or other operative surface or surfaces of a grinding wheel (1) in which the surfaces or surfaces are subject to one or more confined high pressure jets of water or other fluid as the grinding wheel is rotated. The pressure of the water or other fluid is, for example, of the order of 2,000 to 20,000 p.s.i. (140-1400 Kg/cm<2>) or more. The jet or jets of water or other fluid are confined by a shrouding member (2) shrouding a part of the peripheral or other operative surface or surfaces of the grinding wheel (1) e.g. for tangential direction of a jet in contact with the grinding wheel periphery (10) and opposite to the direction of rotation of the wheel. The working surface of the shrouding member or block (2) is shown recessed at (20) and is of hard abrasion resistant material such as tungsten carbide or other hard materials as referred to herein. The water or other fluid may contain solid particles or grit of hard material such as silicon carbide or boron carbide. <IMAGE>
Description
SPECIFICATION
Dressing or shaping grinding wheels
The object of this invention is to provide a method of, and apparatus for, dressing, trueing or similarly shaping or forming grinding wheels and which provides a simple and effective alternative to the use of dressing tools tipped with diamond or other super hard material. Owing to the high cost of industrial diamonds and possible scarcity of their supply, the invention is of particular practical value.
According to one aspect of the invention the method of dressing or similarly shaping or forming a peripheral or other operative surface or surfaces of a grinding wheel is characterised by subjecting said surface or surfaces of the grinding wheel as it is rotated to a confined jet or jets of water or other fluid at high pressure, e.g. of the order of 2,000 to 20,000 p.s.i. (140-1400 Kg/cm2) or more.
According to a further aspect of the invention apparatus for dressing or similarly shaping or forming a peripheral or other operative surface or surfaces of a grinding wheel is characterised by a member adapted to shroud a part of said operative surface or surfaces of a grinding wheel and having at least one inlet bore for admission of water or other fluid at high pressure as aforesaid into contact with the operative surface or surfaces of the grinding wheel as it is rotated, the member having at least one outlet passage for the exhaust of the water or other fluid therefrom together with material removed from the grinding wheel.
The term "fluid" used herein includes liquid or air or other gas or a mixture thereof and may contain solid particles as hereinafter referred to. In practice the procedure and apparatus may be as follows, reference being had to the accompanying drawings in which: FIGURE 1 is a side elevation of a grinding wheel being dressed by the method and apparatus according to this invention,
FIGURE 2 is a plan view of the apparatus, and
FIGURE 3 is a plan view similar to FIGURE 2 but showing a modification.
In the practical application of the invention in dressing the periphery of a grinding wheel 1 there is provided a member for shrouding part of the wheel periphery 10 during rotation of the wheel and shown consisting of a block 2 having a recess 20 in its upper side of a curvature corresponding substantially to that of the grinding wheel periphery 10. Whereas the block 2 is shown under the wheel 1 is may be otherwise positioned about the wheel.
In use the block 2 and grinding wheel 1 are arranged with the periphery of the wheel in light mating contact with the recess 20 and the wheel 1 is rotated at a suitable speed.
Having regard to the conditions of use of the block 2, the complete block or at least its recessed upper face 20 or an insert 21 therein is made of hard material such as tungsten carbide or silicon nitride such as hot pressed silicon nitride known under the trade name "Syalon". The block 2 or its recessed face 20 or insert 21 therein may be of other suitable hard abrasion resistant material as referred to below. The operative surface of the material should have a low coefficient of friction and the material should be mechanically and thermally stable.
The block 2 is provided with at least one inlet fine bore 22 open, i.e. running out, at the bottom of the recess 20 and aligned with a similarly but oppositely arranged outlet passage 23 of larger bore. The bore size of the inlet bore may be .025 mm (.001 inch) up to one millimetre or more dependent on operating requirements.
A supply pipe 24 to the inlet bore 22 is connected to a pump (not shown) supplying liquid such water at high pressure, e.g. of the order of 2,000 to 20,000 p.s.i. (140-1400 Kg/cm2) or even at higher pressures. The resulting jet of water or other liquid issuing from the inlet bore 22 strikes the periphery 10 of the rotating wheel 1 tangentially and owing to the high pressure removes material or particles from the periphery 10 which pass with the water jet to discharge through the outlet or exhaust passageway 23. The outlet opening should be protectively shielded in order to deflect the discharging water and also dissipate its pressure.
The liquid used under high pressure may be machine coolant liquid, i.e. water containing soluble oil, or neat cutting oil.
In order to dress the full or desired width of the periphery 10 of the grinding wheel 1, the wheel 1 and block 2 are relatively traversed in a direction parallel with the axis of rotation of the wheel as indicated by the arrows in FIGURE 2 by any suitable mechanism such as screw mechanism or fluid pressure operated (e.g. hydraulic) means.
As indicated in FIGURE 1 of the drawings the wheel 1 is preferably rotated in a direction opposite to the direction of the high pressure water jet issuing from the inlet bore 22 for maximum effect in removing material from the periphery 10.
Whereas the water jet has the effect of washing removed material or particles away through the exhaust passage 23, it will be appreciated that the recessed face 20 of the block 2 or insert 21 therein at the locality of contact of the water jet with the wheel is subject to arduous conditions of use and therefore requires to be of hard material to withstand such use. In addition to the hard materials already mentioned above, the block 2 or recessed surface 20 thereof or insert 21 therein may be of sintered silicon carbide (e.g. that known under the trade name "Refel" as well as various other hard ceramic materials such as fused alumina, tin oxide or boron carbide (e.g. as used in shot blasting nozzles). Particularly where an insert 21 is employed it may be made of or faced with natural or man-made poly-crystalline diamond.
The surface of the recess 20 or insert 21 should be of dense close grain composition of the hard material so as to have a high compressive strength whilst it should also be chemically inert. The surface of the recess 20 should be smooth to provide a low co-efficient of friction between the periphery 10 of the wheel 1 and the recess 20 and also to the high pressure jet of water and resulting exhaust outflow.
In the development shown in FIGURE 3 the block 2 is provided with a plurality of inlet bores 222 of different bore size for selective use according to requirements, e.g. by means of a control valve in the supply line from the pump to the bores 222. A common exhaust passageway or slot is shown at 223.
In a development the liquid or air at very high pressure may include solid particles or grit, e.g. of silicon carbide or boron carbide so as to have a shot blasting effect in removing material from the wheel periphery 10 or other operative surface or surfaces of the wheel.
The particulate material or grit may be hopper fed by a branch pipe into the supply pipe 24 from the pump output.
The method and apparatus according to this invention may be used in the dressing or shaping of a wide variety of grinding wheels of different composition or form, e.g. where the abrasive material or grit of the wheel consists of aluminium oxide or silicon carbide particles or grit bonded in shellac or rubber or by a vitrified or resinoid bonding. The method and apparatus are also applicable to the dressing of wheels having the periphery or other operative surface or surfaces impregnated with diamond or other super hard abrasive material such as cubic boron nitride. The pressure of the water or other fluid jet applied to the wheel depends upon whether coarse or fine dressing of the wheel is required and also whether the wheel grit is coarse or fine as well as the tenacity of the bonding material.
Claims (17)
1. Method of dressing or similarly shaping or forming a peripheral and/or other operative surface or surfaces of a grinding wheel characterised by subjecting said surface or surfaces of the grinding wheel as it is rotated to a confined jet or jets of water or other fluid at high pressure, e.g. of the order of 2,000 to 20,000 p.s.i.
(140-1400Kg/cm2) or more.
2. Method according to claim 1 wherein the jet or jets of water or other fluid at high pressure is directed for substantially tangential contact with the periphery of the grinding wheel.
3. Method according to claim 1 or 2 wherein the wheel is rotated in the opposite direction to the direction of the jet or jets of water or other fluid at high pressure.
4. Method according to claim 1, 2 or 3 wherein relative traverse of the grinding wheel and jet or jets of high pressure water or other fluid is effected in order to dress or shape a required extent of the peripheral or other operative surface or surfaces of the grinding wheel.
5. Method according to any of the preceding claims wherein the water or other fluid used contains oil, such as water soluble oil (e.g.
machine coolant liquid) or the fluid consists of oil such as cutting oil.
6. Method according to any of the preceding claims wherein the water or other fluid includes solid particles or grit of hard material so as to have a shot blasting effect in removing material from the periphery and/or other operative surface or surfaces of the grinding wheel.
7. Method according to claim 6 wherein the solid particles or grit of hard material consists of silicon carbide and/or boron carbide.
8. Method of dressing or similarly shaping or forming a peripheral and/or other operative surface or surfaces of a grinding wheel substantially as herein described.
9. Apparatus for dressing or similarly shaping or forming a peripheral and/or other operative surface or surfaces of a grinding wheel characterised by a member adapted to shroud a part of said operative surface or surfaces of a grinding wheel and having at least one inlet bore for admission of water or other fluid at high pressure, e.g. of the order of 2,000 to 20,000 p.s.i.
(140-1.400 Kg/cm2) or more into contact with the operative surface or surfaces of the grinding wheel as it is rotated, the member having at least one outlet passage for the exhaust of the water or other fluid therefrom together with material removed from the grinding wheel.
10. Apparatus according to claim 9 wherein the shrouding member is adapted to shroud a part of an operative peripheral surface or surfaces of a grinding wheel and is provided with a recessed working surface or surfaces having a curvature substantially corresponding to that of the periphery of the grinding wheel so as to closely follow or contact said peripnery.
11. Apparatus according to claims 9 and 10 wherein the or each inlet bore of the shrouding member substantially runs out in the recessed surface or surfaces thereof and is directed towards a similarly but oppositely arranged outlet passage of larger bore.
12. Apparatus according to claim 9, 10 or 11 wherein the shrouding member is provided with a plurality of inlet bores e.g. of different size for selective use.
13. Apparatus according to claim 12 wherein the inlet bores are directed towards a similarly but oppositely arranged outlet passage of a width so as to be common to said inlet bores.
14. Apparatus according to any of claims 9 to 13 wherein the shrouding member consists of or has its working surface or surfaces faced with or receiving a hard abrasion resistant material.
15. Apparatus according to claim 14 wherein the hard abrasion resistant material consists of any of the following materials, viz: tungsten carbide, silicon nitride (e.g. hot pressed silicon nitride), silicon carbide (e.g. sintered silicon carbide), ceramic material such as alumina, tinoxide, boron carbide, or natural or man made diamond such as polycrystalline diamond.
16. Apparatus according to any of claims 9 to 15 wherein means is provided for effecting relative traverse of the grinding wheel and shrouding member in order to obtain dressing or shaping of a required extent of the peripheral or other operative surface or surfaces of the grinding wheel.
17. Apparatus for dressing or similarly shaping or forming a peripheral and/or other operative surface or surfaces of a grinding wheel substantially as herein described with reference to
FIGURES 1 and 2 or FIGURE 3 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8002500A GB2067935A (en) | 1980-01-25 | 1980-01-25 | Dressing or shaping grinding wheels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8002500A GB2067935A (en) | 1980-01-25 | 1980-01-25 | Dressing or shaping grinding wheels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2067935A true GB2067935A (en) | 1981-08-05 |
Family
ID=10510879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8002500A Withdrawn GB2067935A (en) | 1980-01-25 | 1980-01-25 | Dressing or shaping grinding wheels |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2067935A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2162110A (en) * | 1984-07-24 | 1986-01-29 | Jetin Ind Ltd | High-pressure liquid cutting apparatus and method |
| US5235959A (en) * | 1991-07-18 | 1993-08-17 | Carl-Zeiss-Stiftung | Arrangement and method for regenerating rotating precision grinding tools |
| US5274964A (en) * | 1992-08-19 | 1994-01-04 | Abrasive Cleaning Systems, Inc. | Dry abrasive belt cleaner |
| EP0584578A1 (en) * | 1992-07-31 | 1994-03-02 | Ngk Insulators, Ltd. | A ground dust removing apparatus and method for grinding wheel |
| EP0854010A1 (en) * | 1997-01-16 | 1998-07-22 | Wernicke & Co. GmbH | Method for prolonging the operating life of a grinding wheel |
| USD803653S1 (en) | 2015-05-07 | 2017-11-28 | Craig R. Smith | Rotary cleaning tool for hardened surfaces |
| TWI695753B (en) * | 2015-01-05 | 2020-06-11 | 日商迪思科股份有限公司 | Cutting method and cutting device |
-
1980
- 1980-01-25 GB GB8002500A patent/GB2067935A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2162110A (en) * | 1984-07-24 | 1986-01-29 | Jetin Ind Ltd | High-pressure liquid cutting apparatus and method |
| US5235959A (en) * | 1991-07-18 | 1993-08-17 | Carl-Zeiss-Stiftung | Arrangement and method for regenerating rotating precision grinding tools |
| EP0584578A1 (en) * | 1992-07-31 | 1994-03-02 | Ngk Insulators, Ltd. | A ground dust removing apparatus and method for grinding wheel |
| US5274964A (en) * | 1992-08-19 | 1994-01-04 | Abrasive Cleaning Systems, Inc. | Dry abrasive belt cleaner |
| WO1994004314A1 (en) * | 1992-08-19 | 1994-03-03 | Abrasive Cleaning Systems, Inc. | Dry abrasive belt cleaner |
| EP0854010A1 (en) * | 1997-01-16 | 1998-07-22 | Wernicke & Co. GmbH | Method for prolonging the operating life of a grinding wheel |
| US5961376A (en) * | 1997-01-16 | 1999-10-05 | Wernicke & Co. Gmbh | Method of increasing the service life of grinding wheels |
| TWI695753B (en) * | 2015-01-05 | 2020-06-11 | 日商迪思科股份有限公司 | Cutting method and cutting device |
| USD803653S1 (en) | 2015-05-07 | 2017-11-28 | Craig R. Smith | Rotary cleaning tool for hardened surfaces |
| US10687613B2 (en) | 2015-05-07 | 2020-06-23 | Craig R. Smith | Rotary cleaning tool for commode surfaces |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |