CA2208771A1 - A process and an apparatus for supplying the interface between an abrasive tool and a workpiece with cooling lubricant - Google Patents
A process and an apparatus for supplying the interface between an abrasive tool and a workpiece with cooling lubricantInfo
- Publication number
- CA2208771A1 CA2208771A1 CA 2208771 CA2208771A CA2208771A1 CA 2208771 A1 CA2208771 A1 CA 2208771A1 CA 2208771 CA2208771 CA 2208771 CA 2208771 A CA2208771 A CA 2208771A CA 2208771 A1 CA2208771 A1 CA 2208771A1
- Authority
- CA
- Canada
- Prior art keywords
- abrasive tool
- annular gap
- area
- tool
- cooling lubricant
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/04—Protective covers for the grinding wheel
- B24B55/045—Protective covers for the grinding wheel with cooling means incorporated
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Gear Processing (AREA)
Abstract
The present invention relates to a process to supply the interface zone between an abrasive tool and a work piece with cooling lubricant. This process incorporates the following steps: a) provision of an annular gap (4) around the outside contour (5) of the abrasive tool (1), said annular gap (4) extending around the major portion of the periphery of the abrasive tool (1); b) interruption of the annular gap (4) in a first area (6) in which the interface zone (3) between the abrasive tool (1) and the work piece (2) is located; c) interruption of the annular gap (4) in a second area (7) that is located in an area of the periphery of the abrasive tool (1) that is spaced apart from the first area (6); d) delivery of cooling lubricant to the second area (7). This means that the cushion of air that forms around the rotating abrasive tool is broken down, so that even a small flow of oil will be sufficient to cool and lubricate the interface between the tool and the workpiece effectively.
Description
A Process and an Apparatus for Supplying the Interface between an Abrasive Tool and a Workpiece with Cooling Lubrlcant The present lnventlon relates to a process for supplylng the interface between an abraslve tool and a work plece with coollng lubrlcants.
In addltion, the lnventlon relates to an apparatus for supplylng the lnterface between an abraslve tool and a work plece with coollng lubrlcant.
In flnishlng processes that remove metal, whlch include, in particular, grinding and similar processes, the quallty and servlce llfe of the work plece that ls to be flnlshed depends to a considerable extent on how good the coollng and lubricatlon of the lnterface between the tool and the work plece can be made durlng the productlon process.
DE 31 15 959 C2 descrlbes a devlce on a gear-grlndlng machlne that ls used to supply coollng lubrlcants to the partlcular area when the grlnding tool acts on the work plece. Thls proceeds from the known process of grlndlng wlthln a bath of coollng lubricant, ln whlch the lnterface between the tool and the work plece ls submerged ln the coolant that ls accommodated ln a coollng-lubrlcant chamber.
It ls also part of the prior art that cooling lubricant can be sprayed onto the lnterface, e.g., onto the area ln whlch the grlndlng wheel and the work piece interact.
~ecause of the hlgh grlnding speeds that are used, in particular, when grinding, there are extremely large centrifugal forces on the perlphery of the grlndlng tool and these throw off the coollng lubrlcant, even lf it ls dellvered under hlgh pressure, wlth the result that lt does not get to the lnterface. Thls can result ln grlndlng damage, ln partlcular grlndlng burns.
Grlnding that ls performed ln a bath of cooling lubrlcant ls known ln prlnclple from US 3,047,987 and the German perlodlcal Industr~e-Anzeiger [Industry Gazette], 97, 19.10.83.
Proceedlng from thls prlor art, DE 31 16 959 C 2 is lntended to so lmprove a process of this klnd that it ls stlll possible to perform grinding operatlons in a bath of cooling lubrlcant. To thls end, provlsion ls made such that the coollng-lubrlcant chamber or parts of the wall of the coollng-lubrlcant chamber are conflgured so as to plvot and lock or change shape, e.g., are flexlble, or that a grlndlng wheel and a chamber that ls assoclated wlth the work wheel together form a chamber, and that they allow the movement that ls requ1red to lnstall and remove the grlndlng wheel and/or the work plece, and to carry out the grlndlng process.
The use of thls and other processes for supplylng the lnterface between work tool and work plece resulted ln further lmprovements: lt has been shown that lncreaslng the quantlty of oll that ls supplled to the lnterface per unlt tlme has a posltlve effect. Subsequently, coollng-lubrlcant supply systems were deslgned to dellver up to 500, and ln some cases even up to 800 lltres of coollng lubrlcant to the lnterface per mlnute. The pressure at whlch the oll or the emulsion is delivered was also increased, pressures of up to 20 bar and more belng used.
When such a plant ls used, a partlcular dlsadvantage that ls encountered ls that lt causes large quantltles of waste and thus hlgh costs. These lnclude not only the cost of the plant ltself, but also costs incurred for the plant slte, lncludlng oll tanks and tanks for preparlng and storing large volumes of oll. In order to make lt possible to supply foam-free oil at hlgh oil-lltre rates per unlt tlme, the oll tanks must be able to contain up to 3000 lltres of oll. Thls, in lts turn, causes higher costs because speclal securlty measures must be put ln place ln order to prevent envlronmental damage.
A further dlsadvantage ls the fact that desplte the use of hlgh quantltles of oll belng dellvered per unit time, lt ls not always posslble to achieve a satisfactory feed of coollng lubrlcant to the work place. Thls ls based on the knowledge that when an abraslve tool rotates at hlgh speed, a cushlon or fllm of alr spreads around thls and thls cushlon or fllm of alr prevents the cooling lubrlcant reachlng the work place ln an optlmal way.
For thls reason, lt ls the task of the present lnventlon to create a process and an apparatus wlth whlch lt ls posslble to brlng coollng lubrlcant lnto lntlmate contact wlth the lnterface zone between an abraslve tool and a work plece, l.e., to supply the work plece wlth cooling lubricant ln an optlmal manner. In partlcular, thls is to be posslble lf the abrasive tool ls used at high worklng speed, whlch also means that maior peripheral acceleratlon forces are present on the tool and a cushlon of alr forms around sald tool. In addltlon, lt ls also lntended to brlng about a slgnlflcant reductlon ln the volume of the flow of oll that ls requlred, so that slgnlflcantly smaller coollng lubrlcant supply systems can be used.
Accordlng to the present lnventlon, thls task has been solved by a process to supply the lnterface zone between an abraslve tool and a work plece wlth coollng lubrlcant uslng the followlng steps:
a) provlslon of an annular gap (4) around the outslde contour (5) of the abraslve tool (1), sald annular gap (4) extendlng around the ma~or portlon of the perlphery of the abraslve tool (l);
b) lnterruptlon of the annular gap (4) in a flrst area (6) ln whlch the lnterface zone (3) between the abraslve tool (1) and the work plece (2) ls located;
c) lnterruptlon of the annular gap (4) ln a second area (7) that ls located ln an area of the perlphery of the abraslve tool (1) that ls remote from the flrst area (6);
d) dellvery of coollng lubrlcant to the second area (7).
Provlslon ls also made such that the annular gap (4) extends transversely to the perlpheral dlrectlon of the abraslve tool (1) essentlally equldlstantly around the outslde contour (5) of the abraslve tool (1). It ls advantageous that the annular gap (4) extend ln the perlpheral dlrectlon of the abraslve tool (1) at least in some sectlons essentlally equldlstantly around the outslde contour (5) of the abraslve tool (1). In thls case, the width of the annular gap (4~ can lncrease or decrease contlnuously at least ln some sectlons around the perlphery of the abraslve tool (l). The wldth of the annular gap (4) ls thus advantageously smaller than or equal to 10 milllmetres, and in partlcular is smaller than or equal to 1 mlllimetre.
Provision ls also made such that the lnterruptlon of the annular gap (4) in the second area (7) ls made wlthin a very small azimuthal area in the peripheral direction of the abrasive tool (1).
The present invention is based on the fact that even a llttle coollng lubrlcant is sufflcient to supply the interface between the tool and the work place efficiently if it can be ensured that the coollng lubrlcant actually reaches the interface. The underlying thought ln the present lnventlon ls thus to break up the film or cushion of air that is forming, or to interrupt it, and deliver coollng lubrlcant to the perlpheral area of the abraslve tool. To thls end-as has been dlscussed-provlslon ls made for the followlng indlvldual features that work ln con~unctlon wlth each other.
- a narrow annular gap that extends over a large area of the perlphery of the abraslve tool ls provlded. The abraslve tool ls surrounded by a houslng, the lnner slde of whlch flts snugly around the tool and leaves only a narrow essentlally equldlstant gap that, lf requlred, gradually wldens out around the perlphery and ls thus "conlcally" formed, through whlch the coollng lubrlcant can be passed.
- the annular gap is lnterrupted flrst at the polnt at whlch the lnterface zone between the tool and the workplace is located, i.e., the tool emerges from the houslng ln a flrst area that ls close to or at the working polnt.
- there ls a second lnterruptlon ln the annular gap that lles at another polnt than the interface between the tool and the work piece. At this point, the cooling lubrlcants ls introduced lnto the annular gap; because of the rotatlon of the tool, this coollng lubricant is gulded through the annular gap and reaches the lnterface.
- the annular gap is optionally matched to the requlrements of fluid mechanlcs in that, ln the areas to whlch no coollng lubricant is to be delivered, it ls narrower than in other areas; thus, lt ls not necessarily of equal slze around the perlphery.
Because of the fact that the lnterruptlon of the annular gap ln thls second area, where the coollng lubricant ls lntroduced, follows within a very small azimuthal area of the perlphery, whlch ls to say abruptly or suddenly, and because of the fluid-dynamic condltions, a partlal vacuum results ln the second area and thls sucks the coollng lubricant into the annular gap. Thls ensures that the annular gap can functlon as a rellable path for the coollng lubrlcant to move along. This also means that the oll ls transported automatically to the lnterface wlthout the need to use larger quantltles. Tests have shown that, uslng the process accordlng to the present lnventlon, the quantltles of coollng lubricant required per unit time can be reduced by a factor of 10 or more relative to the quantities that are normally used.
Desplte the relatlvely small volumetric flow of cooling lubricant, it is nevertheless ensured that no grinding burns can result and that the amount of material removed in the grinding wheel llmitlng tlme is not reduced.
In known processes and with known apparatuses, the oil is transported constantly to the interface by a separate dellvery system. In contrast to thls, accordlng to the present lnvention the oll moves to the lnterface through the tool ltself.
The apparatus that ls used to supply the lnterface between the abrasive tool and the work piece wlth coollng lubricant comprises - a rotatlng abrasive tool (1) that at times is in contact with the work piece ~2);
- a cover (8) for the abrasive tool (1);
- a dellvery system (9) for the coollng lubrlcant.
Accordlng to the present invention, this apparatus ls characterlzed in that:
- the abrasive tool (1) and the cover (8) form an annular gap (4) that extends around the outslde contour (5) of the abraslve tool (1) and extends over a ma~or part of the perlphery of the abrasive tool (l);
- the annular gap (4) is interrupted in a first area (5), ln whlch the lnterface (3) between the abrasive tool (1) and the work piece ~2) ls located, and - the annular gap (4) ls lnterrupted ln a second area (6) that is located ln an area of the perlphery of the abrasive tool (1) that ls spaced apart from the flrst area (1), the coollng lubrlcant belng lntroduced lnto the second area (6).
Here, too, provlslon ls also made such that the annular gap (4) extends transversely to the perlpheral dlrectlon of the abraslve tool (1), essentlally equldlstantly around the outslde contour (5) of the abraslve tool (1). The annular gap (4) extends ln the peripheral dlrectlon of the abraslve tool (1) at least ln some sections essentially equldistantly around the outslde contour (5) of the abraslve tool (1). In this case, the width of the annular gap (4) can increase or decrease contlnuously, at least ln some sectlons around the periphery of the abrasive tool (1). The wldth of the annular gap (4) ls thus advantageously smaller than or equal to 10 millimetres, and in particular is smaller than or equal to 1 millimetre.
It ls also advantageous if the interruptlon of the annular gap (4) ln the second area (7) ls made ln a very small azlmuthal area ln the perlpheral dlrectlon of the abraslve tool (1), whlch ls to say beyond the perlphery, elther suddenly or abruptly.
The followlng are advantageous developments of the present invention:
The grlndlng tool (1) ls a grlndlng tool, ln partlcular, a shaplng grlnder. The proflle of the shaplng grlnder corresponds, essentlally, to the shape of the proflle of the work piece that is to be ground. Advantageously, the grinding tool is a gear grlnder, the proflle of the gear grinding tool correspondlng essentially to the shape of the gaps ln a gear wheel that ls to be ground. The shaped grlndlng dlsk generates a tooth campalgn of the deslred shape and slze when lt ls ground.
The abraslve tool (1) can be a steel body that has a an abraslve coating, or lt can be a dressable grindlng tool.
Alternatlvely, the abraslve tool can be a flexlble dlsk.
Oll, emulslon, or compressed alr can be used as the coollng lubrlcant.
The dellvery of the coollng lubrlcant to the interface by way of the annular gap ls of partlcular lmportance. In one development, provlslon ls made such that ln the flrst area (6) of the lnterface zone between the abrasive tool (1) and the work plece (2) at the place where the annular gap (4) ls lnterrupted, there are means (10) that conduct the coollng lubrlcants onto the lnterface zone (3).
Most advantageously, ln the case of proflle grlndlng, thls ls achleved in that the means (10) to conduct the coollng lubrlcant when gear wheels or workpieces wlth other proflles (e.g., compressor rotors) that belng ground, are matched to the shape of the proflle of the workplece that ls to be ground.
The drawlngs that are appended hereto show one embodlment of the present lnventlon. These drawlngs are as follows:
Flgure 1 A diagrammatlc cross section through the apparatus according to the present inventlon for supplying coollng lubrlcant;
Figure 2: A diagrammatic partial cross section of an abrasive tool and the surrounding cover as shown on the section line A-B;
Flgure 3: A partlal cross sectlon through the abraslve tool and the work place on the sectlon line C-D;
Figure 4 The same cross section as in Figure 3, but with the tool removed;
Figure 5: A diagram showing the speed curve in the annular gap for the outermost area of the abrasive tool.
Figure l is a diagrammatic side view of an abrasive tool 1 that rotates about its axis as indicated by the arrow.
This abraslve tool 1 ls a grlnding wheel that is used to grind a gear wheel 2. This is done by full-shape grinding ~or the single or two-flank grind), i.e., the shape of the grindlng wheel 1 corresponds to the shape of the tooth gap so that, preferably, two ad~acent sides and, optionally, the tooth foot that lies between them are ground. The abrasive tool l generates the desired shape of the tooth gap during the machining process. It should be noted that the process according to the present invention is not, however, restricted to thls type of machining, but that any machinlng with geometrically lndeterminate cuts as well as many processes with geometrically determined cuts can be carried out using the teachings of the present invention.
During the machining process, the grlndlng wheel 1 and work plece 2 are in contact with each other in the lnterface zone 3. There must be a sufflclently large quantlty of coollng lubrlcant avallable at thls polnt ln order to ensure proper machlnlng, and so as to conduct the heat generated durlng the machlnlng process away from the lnterface and also to clear mlcroparticles that have been removed from the workplece out of the lnterface zone.
In the present case, the coollng lubrlcant, for example in the form of oll, ls introduced lnto a dellvery system for dellverlng the coollng lubrlcant 9 ~see arrow marked "oll"). The dellvery system 9 ls connected to the cover 8. The oll passes through a bore 11 ln the cover 8 to an annular gap 4 that ls formed between the abraslve tool 1 and the houslng 8.
The lnterface 3 (flrst areas 6) between the tool and the work plece, whlch ls to say the locatlon at whlch the coollng lubrlcant ls requlred, ls located at some dlstance from the place at whlch the coollng lubrlcant ls lntroduced (second area 7). Thls distlngulshes the conflguratlon accordlng to be present lnventlon from other, usual apparatuses.
In the present case, there ls approximately 270~ of the perlphery of the grlndlng wheel between the lntroductlon polnt for the oll and the grlndlng polnt. The present lnventlon makes provlslon such that the oll flows ln the annular groove 4 ln the dlrectlon of movement of the grlndlng wheel untll lt reaches the work polnt. The angular path along whlch the oll ls passed wlthln the annular gap 4 ls best greater than 90~. Thls ensures that there ls lntlmate contact 25476-lg5 between the cooling lubrlcant and the worklng surface of the grlnding wheel. The fllm of alr ~cushlon of alr) that ls normally formed on the grlndlng wheel is thus broken down.
The apparatus that has been described works partlcularly advantageously lf the polnt of lntroduction 7 for the oll ls so conflgured as to brlng about a ma~or change ln the cross sectlon ("abrupt" or sudden lnterruptlon of the annular gap 4). Thls can be achieved, e.g., ln that the oll supply bore 11 enters the annular gap as far as possible radlally, l.e., at a large angle. Because of the laws of hydrodynamlcs, at a relatlvely hlgh speed of the grlndlng wheel and thus at a hlgh oll flow rate ln the annular gap and glven a relatlvely low flow speed ln the bore 11 (at a sufflclently large dlameter of the bore) there wlll be a ~suction effect~ in the annular gap 4, so that the oil is accelerated on to the worklng surface of the grlndlng wheel wlth the result that there ls lntlmate contact wlth the oll ln thls area.
In Flgure 1, the annular gap 4 extends around almost the whole perlphery of the abraslve tool 1 ln a constant manner, l.e., the annular gap 4 ls formed equidlstantly across the perlphery of the tool 1. For reasons of clarlty, thls ls as shown but lt does not necessarlly have to be so. It may be more useful that the annular gap 4 between the second area (entry polnt for the coollng lubricant) 7 and the right-hand lower end of the cover 8 ls smaller than ln the remalnlng area of the cover 8, slnce ln no coollng lubrlcant has to be dellvered to thls area. In the flgure, thls area ls shown to be exactly as large as in the remaining part of the annular gap 4. In addition, it can also be useful that-although this case is not shown-the annular gap 4 even though it runs essentially equldlstantly around the perlphery of the abrasive tool 1, grows gradually larger or smaller which is to say that it is configured so as to be "conical." The annular gap 4 thus does not necessarily have to be equally large around the whole of the cover.
Figure 2 is a cross section of the line A-B in Figure 1. It can be seen that the grinding tool 1 is enclosed by the cover or the housing 8. As can also be seen, the cover is such that an annular gap 4 is formed and this is of equal thickness across the effective profile of the tool 1, l.e., the annular gap ls equldlstant, the vertlcal dlstance between the outer contour 5 of the grindlng wheel and the lnside llne of the cover 8 ls ldentical across a desired area. It has been shown to be advantageous if an equal distance, thus a width of the annular gap 4, of one millimetres is used.
Flgure 3a is a cross section along the line C-D in Figure 1, and shows the process of profile gear-wheel grinding. In this example, as viewed from its working profile, the grlnding tool 1 is so preclsely conflgured that a gear wheel gap, which is to say two ad~acent sides and possibly the tooth foot that is located between them are ground. This results in the interface zone 3 between work tool 1 and gear wheel 2.
Also important is the provision and configuration of a conductor 10 for the cooling lubricant in order to guide lt ln optlmal manner to the lnterface zone, see Flgure 4. Thls ls the same cross sectlon as ls shown ln Flgure 3, although the tool 1 has been removed. Provision is made such that the conductor 10 matches the shape or the outllne of the grlndlng wheel or that of the tooth gap that ls to be ground. The shape of the tooth gap of the gear wheel 2 that results ln thls case ls provlded wlth coollng lubrlcant in an optimal manner ln thls way.
Finally, Flgure 5 shows the speed curve within the annular gap 4 for the outermost reglon of the abraslve tool.
Correspondlng speed curves results for the whole of the annular gap area for the outer contour 5 of the tool 1. The grlndlng speed Vs, whlch is normally about 14 m/s is that of the grindlng wheel ltself and thus determlnes the speed at one end of the annular gap 4. In contrast to thls, the speed at the houslng ls zero, and thls results ln the speed proflle shown for the annular gap.
Not shown but ~ust as appllcable are the teachlngs of the present lnventlon lf no lndlvldual dlsk but rather, e.g., grlndlng dlsk sets are used. To a certain extent, the apparatus descrlbed hereln can be used for worm hobs. In prlnclple, the technology descrlbed hereln can be used for all abraslve processes such as grlndlng, honlng, and the llke.
Reference numbers used in drawings:
1 Abraslve tool
In addltion, the lnventlon relates to an apparatus for supplylng the lnterface between an abraslve tool and a work plece with coollng lubrlcant.
In flnishlng processes that remove metal, whlch include, in particular, grinding and similar processes, the quallty and servlce llfe of the work plece that ls to be flnlshed depends to a considerable extent on how good the coollng and lubricatlon of the lnterface between the tool and the work plece can be made durlng the productlon process.
DE 31 15 959 C2 descrlbes a devlce on a gear-grlndlng machlne that ls used to supply coollng lubrlcants to the partlcular area when the grlnding tool acts on the work plece. Thls proceeds from the known process of grlndlng wlthln a bath of coollng lubricant, ln whlch the lnterface between the tool and the work plece ls submerged ln the coolant that ls accommodated ln a coollng-lubrlcant chamber.
It ls also part of the prior art that cooling lubricant can be sprayed onto the lnterface, e.g., onto the area ln whlch the grlndlng wheel and the work piece interact.
~ecause of the hlgh grlnding speeds that are used, in particular, when grinding, there are extremely large centrifugal forces on the perlphery of the grlndlng tool and these throw off the coollng lubrlcant, even lf it ls dellvered under hlgh pressure, wlth the result that lt does not get to the lnterface. Thls can result ln grlndlng damage, ln partlcular grlndlng burns.
Grlnding that ls performed ln a bath of cooling lubrlcant ls known ln prlnclple from US 3,047,987 and the German perlodlcal Industr~e-Anzeiger [Industry Gazette], 97, 19.10.83.
Proceedlng from thls prlor art, DE 31 16 959 C 2 is lntended to so lmprove a process of this klnd that it ls stlll possible to perform grinding operatlons in a bath of cooling lubrlcant. To thls end, provlsion ls made such that the coollng-lubrlcant chamber or parts of the wall of the coollng-lubrlcant chamber are conflgured so as to plvot and lock or change shape, e.g., are flexlble, or that a grlndlng wheel and a chamber that ls assoclated wlth the work wheel together form a chamber, and that they allow the movement that ls requ1red to lnstall and remove the grlndlng wheel and/or the work plece, and to carry out the grlndlng process.
The use of thls and other processes for supplylng the lnterface between work tool and work plece resulted ln further lmprovements: lt has been shown that lncreaslng the quantlty of oll that ls supplled to the lnterface per unlt tlme has a posltlve effect. Subsequently, coollng-lubrlcant supply systems were deslgned to dellver up to 500, and ln some cases even up to 800 lltres of coollng lubrlcant to the lnterface per mlnute. The pressure at whlch the oll or the emulsion is delivered was also increased, pressures of up to 20 bar and more belng used.
When such a plant ls used, a partlcular dlsadvantage that ls encountered ls that lt causes large quantltles of waste and thus hlgh costs. These lnclude not only the cost of the plant ltself, but also costs incurred for the plant slte, lncludlng oll tanks and tanks for preparlng and storing large volumes of oll. In order to make lt possible to supply foam-free oil at hlgh oil-lltre rates per unlt tlme, the oll tanks must be able to contain up to 3000 lltres of oll. Thls, in lts turn, causes higher costs because speclal securlty measures must be put ln place ln order to prevent envlronmental damage.
A further dlsadvantage ls the fact that desplte the use of hlgh quantltles of oll belng dellvered per unit time, lt ls not always posslble to achieve a satisfactory feed of coollng lubrlcant to the work place. Thls ls based on the knowledge that when an abraslve tool rotates at hlgh speed, a cushlon or fllm of alr spreads around thls and thls cushlon or fllm of alr prevents the cooling lubrlcant reachlng the work place ln an optlmal way.
For thls reason, lt ls the task of the present lnventlon to create a process and an apparatus wlth whlch lt ls posslble to brlng coollng lubrlcant lnto lntlmate contact wlth the lnterface zone between an abraslve tool and a work plece, l.e., to supply the work plece wlth cooling lubricant ln an optlmal manner. In partlcular, thls is to be posslble lf the abrasive tool ls used at high worklng speed, whlch also means that maior peripheral acceleratlon forces are present on the tool and a cushlon of alr forms around sald tool. In addltlon, lt ls also lntended to brlng about a slgnlflcant reductlon ln the volume of the flow of oll that ls requlred, so that slgnlflcantly smaller coollng lubrlcant supply systems can be used.
Accordlng to the present lnventlon, thls task has been solved by a process to supply the lnterface zone between an abraslve tool and a work plece wlth coollng lubrlcant uslng the followlng steps:
a) provlslon of an annular gap (4) around the outslde contour (5) of the abraslve tool (1), sald annular gap (4) extendlng around the ma~or portlon of the perlphery of the abraslve tool (l);
b) lnterruptlon of the annular gap (4) in a flrst area (6) ln whlch the lnterface zone (3) between the abraslve tool (1) and the work plece (2) ls located;
c) lnterruptlon of the annular gap (4) ln a second area (7) that ls located ln an area of the perlphery of the abraslve tool (1) that ls remote from the flrst area (6);
d) dellvery of coollng lubrlcant to the second area (7).
Provlslon ls also made such that the annular gap (4) extends transversely to the perlpheral dlrectlon of the abraslve tool (1) essentlally equldlstantly around the outslde contour (5) of the abraslve tool (1). It ls advantageous that the annular gap (4) extend ln the perlpheral dlrectlon of the abraslve tool (1) at least in some sectlons essentlally equldlstantly around the outslde contour (5) of the abraslve tool (1). In thls case, the width of the annular gap (4~ can lncrease or decrease contlnuously at least ln some sectlons around the perlphery of the abraslve tool (l). The wldth of the annular gap (4) ls thus advantageously smaller than or equal to 10 milllmetres, and in partlcular is smaller than or equal to 1 mlllimetre.
Provision ls also made such that the lnterruptlon of the annular gap (4) in the second area (7) ls made wlthin a very small azimuthal area in the peripheral direction of the abrasive tool (1).
The present invention is based on the fact that even a llttle coollng lubrlcant is sufflcient to supply the interface between the tool and the work place efficiently if it can be ensured that the coollng lubrlcant actually reaches the interface. The underlying thought ln the present lnventlon ls thus to break up the film or cushion of air that is forming, or to interrupt it, and deliver coollng lubrlcant to the perlpheral area of the abraslve tool. To thls end-as has been dlscussed-provlslon ls made for the followlng indlvldual features that work ln con~unctlon wlth each other.
- a narrow annular gap that extends over a large area of the perlphery of the abraslve tool ls provlded. The abraslve tool ls surrounded by a houslng, the lnner slde of whlch flts snugly around the tool and leaves only a narrow essentlally equldlstant gap that, lf requlred, gradually wldens out around the perlphery and ls thus "conlcally" formed, through whlch the coollng lubrlcant can be passed.
- the annular gap is lnterrupted flrst at the polnt at whlch the lnterface zone between the tool and the workplace is located, i.e., the tool emerges from the houslng ln a flrst area that ls close to or at the working polnt.
- there ls a second lnterruptlon ln the annular gap that lles at another polnt than the interface between the tool and the work piece. At this point, the cooling lubrlcants ls introduced lnto the annular gap; because of the rotatlon of the tool, this coollng lubricant is gulded through the annular gap and reaches the lnterface.
- the annular gap is optionally matched to the requlrements of fluid mechanlcs in that, ln the areas to whlch no coollng lubricant is to be delivered, it ls narrower than in other areas; thus, lt ls not necessarily of equal slze around the perlphery.
Because of the fact that the lnterruptlon of the annular gap ln thls second area, where the coollng lubricant ls lntroduced, follows within a very small azimuthal area of the perlphery, whlch ls to say abruptly or suddenly, and because of the fluid-dynamic condltions, a partlal vacuum results ln the second area and thls sucks the coollng lubricant into the annular gap. Thls ensures that the annular gap can functlon as a rellable path for the coollng lubrlcant to move along. This also means that the oll ls transported automatically to the lnterface wlthout the need to use larger quantltles. Tests have shown that, uslng the process accordlng to the present lnventlon, the quantltles of coollng lubricant required per unit time can be reduced by a factor of 10 or more relative to the quantities that are normally used.
Desplte the relatlvely small volumetric flow of cooling lubricant, it is nevertheless ensured that no grinding burns can result and that the amount of material removed in the grinding wheel llmitlng tlme is not reduced.
In known processes and with known apparatuses, the oil is transported constantly to the interface by a separate dellvery system. In contrast to thls, accordlng to the present lnvention the oll moves to the lnterface through the tool ltself.
The apparatus that ls used to supply the lnterface between the abrasive tool and the work piece wlth coollng lubricant comprises - a rotatlng abrasive tool (1) that at times is in contact with the work piece ~2);
- a cover (8) for the abrasive tool (1);
- a dellvery system (9) for the coollng lubrlcant.
Accordlng to the present invention, this apparatus ls characterlzed in that:
- the abrasive tool (1) and the cover (8) form an annular gap (4) that extends around the outslde contour (5) of the abraslve tool (1) and extends over a ma~or part of the perlphery of the abrasive tool (l);
- the annular gap (4) is interrupted in a first area (5), ln whlch the lnterface (3) between the abrasive tool (1) and the work piece ~2) ls located, and - the annular gap (4) ls lnterrupted ln a second area (6) that is located ln an area of the perlphery of the abrasive tool (1) that ls spaced apart from the flrst area (1), the coollng lubrlcant belng lntroduced lnto the second area (6).
Here, too, provlslon ls also made such that the annular gap (4) extends transversely to the perlpheral dlrectlon of the abraslve tool (1), essentlally equldlstantly around the outslde contour (5) of the abraslve tool (1). The annular gap (4) extends ln the peripheral dlrectlon of the abraslve tool (1) at least ln some sections essentially equldistantly around the outslde contour (5) of the abraslve tool (1). In this case, the width of the annular gap (4) can increase or decrease contlnuously, at least ln some sectlons around the periphery of the abrasive tool (1). The wldth of the annular gap (4) ls thus advantageously smaller than or equal to 10 millimetres, and in particular is smaller than or equal to 1 millimetre.
It ls also advantageous if the interruptlon of the annular gap (4) ln the second area (7) ls made ln a very small azlmuthal area ln the perlpheral dlrectlon of the abraslve tool (1), whlch ls to say beyond the perlphery, elther suddenly or abruptly.
The followlng are advantageous developments of the present invention:
The grlndlng tool (1) ls a grlndlng tool, ln partlcular, a shaplng grlnder. The proflle of the shaplng grlnder corresponds, essentlally, to the shape of the proflle of the work piece that is to be ground. Advantageously, the grinding tool is a gear grlnder, the proflle of the gear grinding tool correspondlng essentially to the shape of the gaps ln a gear wheel that ls to be ground. The shaped grlndlng dlsk generates a tooth campalgn of the deslred shape and slze when lt ls ground.
The abraslve tool (1) can be a steel body that has a an abraslve coating, or lt can be a dressable grindlng tool.
Alternatlvely, the abraslve tool can be a flexlble dlsk.
Oll, emulslon, or compressed alr can be used as the coollng lubrlcant.
The dellvery of the coollng lubrlcant to the interface by way of the annular gap ls of partlcular lmportance. In one development, provlslon ls made such that ln the flrst area (6) of the lnterface zone between the abrasive tool (1) and the work plece (2) at the place where the annular gap (4) ls lnterrupted, there are means (10) that conduct the coollng lubrlcants onto the lnterface zone (3).
Most advantageously, ln the case of proflle grlndlng, thls ls achleved in that the means (10) to conduct the coollng lubrlcant when gear wheels or workpieces wlth other proflles (e.g., compressor rotors) that belng ground, are matched to the shape of the proflle of the workplece that ls to be ground.
The drawlngs that are appended hereto show one embodlment of the present lnventlon. These drawlngs are as follows:
Flgure 1 A diagrammatlc cross section through the apparatus according to the present inventlon for supplying coollng lubrlcant;
Figure 2: A diagrammatic partial cross section of an abrasive tool and the surrounding cover as shown on the section line A-B;
Flgure 3: A partlal cross sectlon through the abraslve tool and the work place on the sectlon line C-D;
Figure 4 The same cross section as in Figure 3, but with the tool removed;
Figure 5: A diagram showing the speed curve in the annular gap for the outermost area of the abrasive tool.
Figure l is a diagrammatic side view of an abrasive tool 1 that rotates about its axis as indicated by the arrow.
This abraslve tool 1 ls a grlnding wheel that is used to grind a gear wheel 2. This is done by full-shape grinding ~or the single or two-flank grind), i.e., the shape of the grindlng wheel 1 corresponds to the shape of the tooth gap so that, preferably, two ad~acent sides and, optionally, the tooth foot that lies between them are ground. The abrasive tool l generates the desired shape of the tooth gap during the machining process. It should be noted that the process according to the present invention is not, however, restricted to thls type of machining, but that any machinlng with geometrically lndeterminate cuts as well as many processes with geometrically determined cuts can be carried out using the teachings of the present invention.
During the machining process, the grlndlng wheel 1 and work plece 2 are in contact with each other in the lnterface zone 3. There must be a sufflclently large quantlty of coollng lubrlcant avallable at thls polnt ln order to ensure proper machlnlng, and so as to conduct the heat generated durlng the machlnlng process away from the lnterface and also to clear mlcroparticles that have been removed from the workplece out of the lnterface zone.
In the present case, the coollng lubrlcant, for example in the form of oll, ls introduced lnto a dellvery system for dellverlng the coollng lubrlcant 9 ~see arrow marked "oll"). The dellvery system 9 ls connected to the cover 8. The oll passes through a bore 11 ln the cover 8 to an annular gap 4 that ls formed between the abraslve tool 1 and the houslng 8.
The lnterface 3 (flrst areas 6) between the tool and the work plece, whlch ls to say the locatlon at whlch the coollng lubrlcant ls requlred, ls located at some dlstance from the place at whlch the coollng lubrlcant ls lntroduced (second area 7). Thls distlngulshes the conflguratlon accordlng to be present lnventlon from other, usual apparatuses.
In the present case, there ls approximately 270~ of the perlphery of the grlndlng wheel between the lntroductlon polnt for the oll and the grlndlng polnt. The present lnventlon makes provlslon such that the oll flows ln the annular groove 4 ln the dlrectlon of movement of the grlndlng wheel untll lt reaches the work polnt. The angular path along whlch the oll ls passed wlthln the annular gap 4 ls best greater than 90~. Thls ensures that there ls lntlmate contact 25476-lg5 between the cooling lubrlcant and the worklng surface of the grlnding wheel. The fllm of alr ~cushlon of alr) that ls normally formed on the grlndlng wheel is thus broken down.
The apparatus that has been described works partlcularly advantageously lf the polnt of lntroduction 7 for the oll ls so conflgured as to brlng about a ma~or change ln the cross sectlon ("abrupt" or sudden lnterruptlon of the annular gap 4). Thls can be achieved, e.g., ln that the oll supply bore 11 enters the annular gap as far as possible radlally, l.e., at a large angle. Because of the laws of hydrodynamlcs, at a relatlvely hlgh speed of the grlndlng wheel and thus at a hlgh oll flow rate ln the annular gap and glven a relatlvely low flow speed ln the bore 11 (at a sufflclently large dlameter of the bore) there wlll be a ~suction effect~ in the annular gap 4, so that the oil is accelerated on to the worklng surface of the grlndlng wheel wlth the result that there ls lntlmate contact wlth the oll ln thls area.
In Flgure 1, the annular gap 4 extends around almost the whole perlphery of the abraslve tool 1 ln a constant manner, l.e., the annular gap 4 ls formed equidlstantly across the perlphery of the tool 1. For reasons of clarlty, thls ls as shown but lt does not necessarlly have to be so. It may be more useful that the annular gap 4 between the second area (entry polnt for the coollng lubricant) 7 and the right-hand lower end of the cover 8 ls smaller than ln the remalnlng area of the cover 8, slnce ln no coollng lubrlcant has to be dellvered to thls area. In the flgure, thls area ls shown to be exactly as large as in the remaining part of the annular gap 4. In addition, it can also be useful that-although this case is not shown-the annular gap 4 even though it runs essentially equldlstantly around the perlphery of the abrasive tool 1, grows gradually larger or smaller which is to say that it is configured so as to be "conical." The annular gap 4 thus does not necessarily have to be equally large around the whole of the cover.
Figure 2 is a cross section of the line A-B in Figure 1. It can be seen that the grinding tool 1 is enclosed by the cover or the housing 8. As can also be seen, the cover is such that an annular gap 4 is formed and this is of equal thickness across the effective profile of the tool 1, l.e., the annular gap ls equldlstant, the vertlcal dlstance between the outer contour 5 of the grindlng wheel and the lnside llne of the cover 8 ls ldentical across a desired area. It has been shown to be advantageous if an equal distance, thus a width of the annular gap 4, of one millimetres is used.
Flgure 3a is a cross section along the line C-D in Figure 1, and shows the process of profile gear-wheel grinding. In this example, as viewed from its working profile, the grlnding tool 1 is so preclsely conflgured that a gear wheel gap, which is to say two ad~acent sides and possibly the tooth foot that is located between them are ground. This results in the interface zone 3 between work tool 1 and gear wheel 2.
Also important is the provision and configuration of a conductor 10 for the cooling lubricant in order to guide lt ln optlmal manner to the lnterface zone, see Flgure 4. Thls ls the same cross sectlon as ls shown ln Flgure 3, although the tool 1 has been removed. Provision is made such that the conductor 10 matches the shape or the outllne of the grlndlng wheel or that of the tooth gap that ls to be ground. The shape of the tooth gap of the gear wheel 2 that results ln thls case ls provlded wlth coollng lubrlcant in an optimal manner ln thls way.
Finally, Flgure 5 shows the speed curve within the annular gap 4 for the outermost reglon of the abraslve tool.
Correspondlng speed curves results for the whole of the annular gap area for the outer contour 5 of the tool 1. The grlndlng speed Vs, whlch is normally about 14 m/s is that of the grindlng wheel ltself and thus determlnes the speed at one end of the annular gap 4. In contrast to thls, the speed at the houslng ls zero, and thls results ln the speed proflle shown for the annular gap.
Not shown but ~ust as appllcable are the teachlngs of the present lnventlon lf no lndlvldual dlsk but rather, e.g., grlndlng dlsk sets are used. To a certain extent, the apparatus descrlbed hereln can be used for worm hobs. In prlnclple, the technology descrlbed hereln can be used for all abraslve processes such as grlndlng, honlng, and the llke.
Reference numbers used in drawings:
1 Abraslve tool
2 Workpiece
3 Interface zone
4 Annular gap Outer shape of the abraslve tool 6 First area (interface zone) 7 Second area (entry point for cooling lubricant) 8 Cover of the abrasive tool 9 Delivery system for the cooling lubricant Conductor for the cooling lubricant 11 Bore Vs Speed of grinding wheel lS
Claims (26)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS
1. A process for supplying the interface zone (3) between an abrasive tool (1) and a work piece (2) with cooling lubricant, which comprises the following steps:
a) provision of an annular gap (4) around the outer contour (5) of the abrasive tool (1), this annular gap (4) extending over the major part of the periphery of the abrasive tool (1);
b) interruption of the annular gap (4) in a first areas (6) in which the interface zone (3) between the abrasive tool (1) and the workpiece (2) is located;
c) interruption of the annular gap (4) in a second area (7) that is located in an area of the periphery of the abrasive tool (1) that is remote from the first area (6);
d) delivery of cooling lubricant into the second area (7).
a) provision of an annular gap (4) around the outer contour (5) of the abrasive tool (1), this annular gap (4) extending over the major part of the periphery of the abrasive tool (1);
b) interruption of the annular gap (4) in a first areas (6) in which the interface zone (3) between the abrasive tool (1) and the workpiece (2) is located;
c) interruption of the annular gap (4) in a second area (7) that is located in an area of the periphery of the abrasive tool (1) that is remote from the first area (6);
d) delivery of cooling lubricant into the second area (7).
2. A process as defined in Claim 1, characterized in that the annular gap (4) extends transversely to be direction of the periphery of the abrasive tool (1) essentially equidistantly around the outside contour (5) of the abrasive tool (1).
3. A process as defined in Claim 1 or 2, characterized in that the annular gap (4) extends in the direction of the periphery of the abrasive tool (1) at least in some sections essentially equidistantly around the outside shape (5) of the abrasive tool (1).
4. A process as defined in one of the Claims 1 to 3, characterized in that the thickness of the annular gap (4) in the peripheral direction of the abrasive tool (1) increases or decreases continuously, at least in some sections.
5. A process as defined in Claim 1 to Claim 4, characterized in that the thickness of the annular gap (4) is smaller than or equal to 10 millimetres.
6. A process as defined in Claim 5, characterized in that the thickness of the annular gap (4) is smaller than or equal to 1 millimetre.
7. A process as defined in one of the preceding claims, characterized in that the interruption of the annular gap (4) in the second area (7) occurs within a very small azimuthal area in the direction of the perimeter of the abrasive tool (1).
8. An apparatus for supplying the interface zone (3) between an abrasive tool (3) and a workpiece (2) with cooling lubricant, that incorporates - a rotating abrasive tool (1) that is in contact with a workpiece (2) at times;
- a cover (8) of the abrasive tool (1), and - a delivery system (9) for delivering cooling lubricant, characterized in that - the abrasive tool (1) and the cover (8) form an annular gap (1) that extends around the outside shape (5) of the abrasive tool (1) and over a major part of the periphery of the abrasive tool (1);
- the annular gap (4) is interrupted in a first area (5) in which the interface zone (3) between the abrasive tool (1) and the workpiece (2) is located, and - the annular gap (4) is interrupted in a second area (6) that is located in an area of the periphery of the abrasive tool (1) that is remote from the first area (5), the cooling lubricant being delivered to the second area (6).
- a cover (8) of the abrasive tool (1), and - a delivery system (9) for delivering cooling lubricant, characterized in that - the abrasive tool (1) and the cover (8) form an annular gap (1) that extends around the outside shape (5) of the abrasive tool (1) and over a major part of the periphery of the abrasive tool (1);
- the annular gap (4) is interrupted in a first area (5) in which the interface zone (3) between the abrasive tool (1) and the workpiece (2) is located, and - the annular gap (4) is interrupted in a second area (6) that is located in an area of the periphery of the abrasive tool (1) that is remote from the first area (5), the cooling lubricant being delivered to the second area (6).
9. An apparatus as defined in Claim 8, characterized in that the annular gap (4) extends transversely to the peripheral direction of the abrasive tool (1) essentially equidistantly around the outside contour (5) of the abrasive tool (1).
10. An apparatus as defined in Claim 8 or Claim 9, characterized in that the annular gap (4) extends in the peripheral direction of the abrasive tool (1), at least in sections, essentially equidistantly around the outside shape (5) of the abrasive tool (1).
11. An apparatus as defined in one of the Claims 8 to 10., characterized in that the thickness of the annular gap (4) in the peripheral direction of the abrasive tool (1) increases or decreases continuously, at least in some sections.
12. An apparatus as defined in one of the Claims 8 to 11, characterized in that the thickness of the annular gap (4) is smaller than or equal to 10 millimetres.
13. An apparatus as defined in Claim 12, characterized in that in that the thickness of the annular gap (4) is smaller than or equal to 1 millimetre.
14. An apparatus as defined in one of the Claims 8 to 13, characterized in that the interruption of the annular gap (4) in the second area (6) in the peripheral direction of the abrasive tool (1) occurs within a very small azimuthal area.
An apparatus as defined in one of the Claims 8 to 14, characterized in that the abrasive tool (1) is a grinder.
16. An apparatus as defined in Claim 15, characterized in that the grinding tool is a shaping grinder.
17. An apparatus as defined in Claim 16, characterized in that the profile of the profile tool corresponds essentially to the shape of the profile that is to be ground.
18. An apparatus as defined in Claim 15 , 16, or 17, characterized in that the grinding tool using a gear grinder.
19. An apparatus as defined in one of the Claims 15 to 18, characterized in that the profile of the gear grinder corresponds essentially to the shape of the tooth space of a gear wheel that is to be ground.
20. An apparatus as defined in one of the Claims 8 to 19, characterized in that the abrasive tool (1) is steel body that is coated with an abrasive coating.
21. An apparatus as defined in one of the Claims 8 to 19, characterized in that the abrasive tool (1) is a dressable grinder.
22. An apparatus as defined in one of the Claims 8 to 14, characterized in that the abrasive tool (1) is a flexible disk.
23. An apparatus as defined in one of the Claims 8 to 22, characterized in that the cooling lubricant is oil or an emulsion.
24. An apparatus as defined in one of the Claims 8 to 22, characterized in that the cooling lubricant is air.
25. An apparatus as defined in one of the Claims 8 to 24, characterized in that the first area (6) of the interface zone between the abrasive tool (1) and workpiece (2), in which the annular gap (4) is interrupted, there are means (10) that conduct the cooling lubricant to the interface zone (3).
26. An apparatus as defined in Claim 25, characterized in that the means (10) to conduct the cooling lubricant when gear wheels or work pieces with other profiles that are to be machined are matched to the shape of the profile that is to the ground on the workpiece (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19625286.5 | 1996-06-25 | ||
| DE1996125286 DE19625286A1 (en) | 1996-06-25 | 1996-06-25 | Method and device for supplying the interaction zone between an abrasive tool and a workpiece with cooling lubricant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2208771A1 true CA2208771A1 (en) | 1997-12-25 |
Family
ID=7797890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2208771 Abandoned CA2208771A1 (en) | 1996-06-25 | 1997-06-24 | A process and an apparatus for supplying the interface between an abrasive tool and a workpiece with cooling lubricant |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0816015A1 (en) |
| JP (1) | JPH10113867A (en) |
| CA (1) | CA2208771A1 (en) |
| DE (1) | DE19625286A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19916002A1 (en) * | 1999-04-09 | 2000-10-12 | Schaudt Maschinenbau Gmbh | Cooling lubricant feeder comprises nozzle with orifice next to grinder disc contact point |
| AT502444B1 (en) * | 2005-02-09 | 2008-09-15 | Schrottner Gerhard | WHEEL SHIELD |
| DE102005020332B4 (en) * | 2005-04-26 | 2012-02-02 | Reinz-Dichtungs-Gmbh | Method for making a supply plate for electrochemical systems, supply plate and their use |
| DE102014111158A1 (en) * | 2014-08-06 | 2016-02-11 | Klingelnberg Ag | Device with fluid nozzle arrangement for delivering a fluid to a grinding tool and use of a fluid nozzle arrangement in a grinding machine |
| DE102018100376A1 (en) * | 2018-01-09 | 2019-07-11 | Rolls-Royce Deutschland Ltd & Co Kg | Device for covering a tooth profile |
| DE102018001103A1 (en) * | 2018-02-09 | 2019-08-14 | Rheinisch-Westfälische Technische Hochschule (Rwth) Aachen | Device for toothing workpieces |
| CN111014838B (en) * | 2019-12-05 | 2020-10-16 | 西安法士特汽车传动有限公司 | Pneumatic oil slinger of gear grinding machine tool |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE661944C (en) * | 1932-05-04 | 1938-07-02 | Ind Of America Inc | Abrasive cutting for cutting and cutting workpieces |
| US2462710A (en) * | 1946-05-30 | 1949-02-22 | Ballinger Lewis John Howell | Abrasive wheel guard |
| US2842908A (en) * | 1957-03-29 | 1958-07-15 | American Chain & Cable Co | Abrasive cutting wheel mounting and guard |
| FR1301500A (en) * | 1960-08-19 | 1962-08-17 | Hydrol Chemical Company Ltd | Grinding machine |
| SU1042977A1 (en) * | 1965-01-28 | 1983-09-23 | Khudobin Leonid V | Method of cooling in grinding |
| DE3319471C1 (en) * | 1983-05-28 | 1984-06-20 | Dieter Dr.-Ing. 7505 Ettlingen Wiener | Method of machining the tooth flanks of gears by grinding while using cooling lubricant, and cooling lubricant for carrying out the method |
| DE3739703A1 (en) * | 1987-11-24 | 1989-06-08 | Koenig Gmbh W | Method for cooling tools containing diamond material and abrasive material and device for carrying out the method |
-
1996
- 1996-06-25 DE DE1996125286 patent/DE19625286A1/en not_active Withdrawn
-
1997
- 1997-06-19 EP EP97110001A patent/EP0816015A1/en not_active Withdrawn
- 1997-06-20 JP JP9199085A patent/JPH10113867A/en active Pending
- 1997-06-24 CA CA 2208771 patent/CA2208771A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0816015A1 (en) | 1998-01-07 |
| DE19625286A1 (en) | 1998-01-02 |
| JPH10113867A (en) | 1998-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4480370B2 (en) | Tooth and screw grinding machine | |
| US7182674B2 (en) | Coolant delivery apparatus for machine tool | |
| US5231587A (en) | Computer controlled lens surfacer | |
| CA2208771A1 (en) | A process and an apparatus for supplying the interface between an abrasive tool and a workpiece with cooling lubricant | |
| CA2493767A1 (en) | Method and apparatus for grinding | |
| US5139005A (en) | Universal dressing roller and method and apparatus for dressing cup-shaped grinding wheels | |
| EP0706436B1 (en) | Method of sharpening cutting blades | |
| AU667272B2 (en) | Method of sharpening profile-sharpened cutting blades | |
| US4142333A (en) | Generating method for grinding cylindrical gears | |
| WO1992000832A1 (en) | Computer controlled lens surfacer | |
| EP0166407B1 (en) | Device for supplying grinding fluid | |
| US3598100A (en) | Dresser structures | |
| US4203260A (en) | Apparatus for grinding cylindrical gears | |
| Salje et al. | Dressing of conventional and CBN grinding wheels with diamond form rollers | |
| JPH07237122A (en) | Grinding processor | |
| US5931612A (en) | Hob cutter for machining face gears, and method for manufacturing such a tool | |
| EP0796163B1 (en) | Method for manufacturing a hob cutter for machining face gears | |
| JPS61164779A (en) | Method and device for machining rubber roll | |
| GB2207627A (en) | Dressing grinding wheels | |
| RU2071901C1 (en) | Method of double-sided end face grinding | |
| KR840000295Y1 (en) | Rotary plane grinder type grind head | |
| KR20010007822A (en) | Equipment a rise automatic of rotative speed for grindstone | |
| RU2066268C1 (en) | Grinding method | |
| JP2023158591A (en) | Grinder | |
| KR200171019Y1 (en) | Device for grinding stone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |