EP1083028A2 - Dispositif de dressage - Google Patents

Dispositif de dressage Download PDF

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Publication number
EP1083028A2
EP1083028A2 EP00119573A EP00119573A EP1083028A2 EP 1083028 A2 EP1083028 A2 EP 1083028A2 EP 00119573 A EP00119573 A EP 00119573A EP 00119573 A EP00119573 A EP 00119573A EP 1083028 A2 EP1083028 A2 EP 1083028A2
Authority
EP
European Patent Office
Prior art keywords
dressing
tool
head
cooling
coolant
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Withdrawn
Application number
EP00119573A
Other languages
German (de)
English (en)
Other versions
EP1083028A3 (fr
Inventor
Jurgen Doffinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Riegger Diamantwerkzeuge GmbH
Original Assignee
Riegger Diamantwerkzeuge GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Riegger Diamantwerkzeuge GmbH filed Critical Riegger Diamantwerkzeuge GmbH
Publication of EP1083028A2 publication Critical patent/EP1083028A2/fr
Publication of EP1083028A3 publication Critical patent/EP1083028A3/fr
Withdrawn legal-status Critical Current

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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
    • B24B53/095—Cooling or lubricating during dressing operation
    • 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
    • B24B53/12—Dressing tools; Holders therefor

Definitions

  • the present invention relates to a dressing device with a dressing tool, which is attached by means of a tool holder in the front of a dressing head and a method for cooling the dressing tool in a dressing device.
  • Such dressing devices and methods are known per se and can be found, for example, during processing of grinding tools such as grinding wheels u. Like use.
  • the dressing device has a dressing head, in the front of which a dressing tool is inserted and fastened is, for example, a diamond tool with one or more diamonds embedded in an insert.
  • a general problem with such dressing devices is that they have to be machined Parts with the highest dimensional and shape accuracy must be machined, being reproducible Dressing results must result.
  • the machined parts must also be reproducible Work results, i.e. deliver reproducible grinding results in the case of grinding wheels.
  • the processing times per part and the non-productive times should also be considered (Changing the dressing tool, increasing the dressing intervals of the parts to be machined) if possible be kept low.
  • a particular problem is that the dressing tool is missing or inadequate Cooling can be thermally damaged. This is especially the case with diamond tools because the diamond is temperature sensitive and tends to become graphite at higher temperatures convert. Such damage to the dressing tool leads to impairment the cutting ability of the dressing tool and thus to geometrical inaccuracies editing part. Therefore, it is common to have a separate coolant jet on the dressing tool to judge. However, this is during operation due to the prevailing pressure conditions distracted from the dressing tool.
  • the object of the present invention is therefore to provide a dressing device of the above. Art or to provide a method in which the dressing tool is sufficiently cooled without that losses in processing quality, processing times and non-productive times have to be accepted.
  • the solution consists in a dressing device with the features of claim 1 or one Method with the features of claim 19.
  • the dressing head has two cooling channels and two cooling nozzles connected thereto, the cooling nozzles are arranged next to two opposite sides of the dressing tool and that the dressing device further comprises a distributor device with at least one with the cooling channels of the dressing head connected coolant supply and at least one with the coolant supply connected coolant connection.
  • the main idea of the invention is therefore two coolant flows as close to the dressing tool along that there is no distraction away from the dressing tool. Is to provided to integrate two cooling nozzles in the dressing head, which are located on the side of the dressing tool are arranged and to guide the coolant flow through the dressing head. This ensures that the dressing tool is cooled sufficiently. Because of the proximity of the dressing tool and cooling nozzles ensures that the coolant jet is not deflected and the dressing tool cools permanently, evenly and reliably.
  • An advantageous training is that the cooling nozzles are arranged parallel to each other. This means that a dressing tool, For example, a diamond dressing tool can be completely used up without the The direction of the coolant flows must be reset. The parallel coolant flows always along the sides of the dressing tool or tool holder and care in everyone Stage of wear of the dressing tool for reliable cooling.
  • the cross section of the cooling nozzles or the geometry of the nozzle opening advantageously corresponds to the length of the dressing tool so that the coolant flows over the entire length of the dressing tool are in contact with it and enable uniform cooling over a large area.
  • the distributor device should have two distributor channels as coolant supply, each of which Distribution channel is connected to a cooling channel n of the dressing head, so that both cooling channels be supplied with coolant evenly.
  • the distribution device can be a separate component be, which is attached to the back of the dressing head facing away from the dressing tool, so that the coolant connection, for example a hose leading to a coolant reservoir, in a simple manner Way can be guided away from the dressing device.
  • the dressing head on its top has additional cooling device with an additional cooling nozzle.
  • This will be an additional one Cooling effect achieved.
  • the additional cooling nozzle is advantageously tangential to the dressing tool arranged, i.e. the coolant flow is in contact with the top of the dressing tool or of the tool holder.
  • the cross section of the additional cooling nozzle should preferably be about the width correspond to the effective tool surface of the dressing tool. This creates a distraction of the two lateral coolant flows away from the dressing tool.
  • the additional cooling device can be attached in a longitudinally displaceable manner on the dressing head, so that the dressing device according to the invention is equipped with dressing tools of different dimensions can be.
  • a further advantageous development provides that the dressing head is fastened in such a way that the Tilt angle is adjustable.
  • a fork can be provided in which the dressing head is rotatably arranged on an axis, wherein the dressing head and the fork further devices have to determine the angle of inclination of the dressing head. So that the dressing tool then also aligned to the center of the parts to be machined, for example the grinding wheels if the installation heights for the dressing device according to the invention on different Machine tools is different. Then the dressing device according to the invention universally applicable on different machine tools.
  • the dressing head can also have a support plate on its underside for stabilization.
  • the dressing device according to the invention can be mounted on a machine tool Be bearing shell attached, which in turn attached to the machine bed of a machine tool can be.
  • This bearing shell is preferably axially displaceable on the machine tool, so that when the dimensions of the dressing tool or the part to be treated change Dressing device can be realigned.
  • the dressing device according to the invention is preferably used on cylindrical or special grinding machines, in particular for processing grinding tools, for example grinding wheels.
  • FIGS. 1 and 2 show an exemplary embodiment of a dressing device 1 according to the invention.
  • This is a dressing device 1 for a cylindrical grinding machine for processing of grinding wheels with a diamond tool as a dressing tool 54.
  • the structure of the multi-part Dressing device 1 can be seen in FIGS. 3 to 9.
  • the structure of the dressing head 10 is first obtained, which serves to receive the dressing tool 54.
  • the dressing head 10 is approximately cuboid.
  • On the top 11 there are four bores 22a, 22b, 23a and 23b, which are used to attach one serve further separate cooling device 40 (see FIG. 8 and associated description).
  • the Side surfaces 15 and 16 also each have two bores 17a, 18a, 17b, 18b, the Bores 18a, 18b for receiving an axis of rotation 78 (see FIG. 9) around which the dressing head 10 is rotatable along arrow A so that its angle of inclination is adjustable.
  • the holes 17a, 17b serve to accommodate set screws with which a certain angle of inclination of the dressing head 10 can be determined (see FIG. 9).
  • the support plate 60 On the underside 12 of the dressing head 10 there is also a bore (not shown) for fastening a support plate 60 ( Figure 4).
  • the support plate 60 has a bore 62 corresponding thereto, so that it by means of a screw, nut or the like. are attached to the underside 12 of the dressing head 10 can.
  • the front 13 of the dressing head 10 is characterized by two obliquely elongated forward bevelled front surfaces 19, 20, between which a receiving opening 21 for a tool holder 50 is provided.
  • Each front surface 19, 20 has two holes for attaching the Tool holder 50 in the receiving opening 21 by means of screws or the like (shown are the Bores 19a, 19b in the front surface 19).
  • the support plate is used to stabilize the dressing head 10 60 provided with an attachment 61, the width of which corresponds to the width of the receiving opening 21, so that it is received in the assembled tool in the receiving opening 21 and that Dressing tool 50 supports.
  • the design of the dressing tool 50 shown in FIG. 5 represents only one of numerous Possibilities.
  • the illustrated dressing tool 50 has an approximately trapezoidal shape Body 59 with two holes 51, 52, which with the holes in the front surfaces 19, 20 of The dressing head 10 is aligned so that the dressing tool 50 is centered by means of two screws or the like can be fixed in the receiving opening 21.
  • the wide base edge 55 is to the dressing head 10 and the narrow base edge 56 of the trapezoidal body 59 is oriented towards the workpiece.
  • the narrow base edge 56 has a tool holder 53 with a rectangular cross section centrally received tool 54, for example a diamond dressing tool.
  • the tool holder 53 corresponds to the width of the body 59 or the receiving opening 21, the tool 54, which is also rectangular in cross section, is itself narrower.
  • the Tool holder 50 including tool 54 can therefore be changed quickly and easily, for example to replace the tool 54.
  • the dressing head 10 together with the inserted tool holder 50 is a total designed so that its angle of inclination can be up to 35 ° without the workpiece, For example, to collide a grinding wheel to be machined.
  • the cooling nozzles 25a, 26a are two on the flattened edges 19 ', 20' of the front surfaces 19, 20 Cooling channels 25, 26 arranged.
  • the cooling nozzles 25a, 26a are parallel to one another in the exemplary embodiment arranged and of rectangular cross section with a height of about 15 mm. This nozzle proximity is particularly advantageous because it allows the embodiment of the invention Dressing device 1 with all plate-shaped dressing tools for cylindrical grinding and to insert sloping plunge tires.
  • the comparatively narrow and tall cooling nozzles 25a, 26a are oriented parallel to the tool 54 when the tool holder 50 is inserted allow two parallel coolant flows regardless of the height of the dressing tool to emit which the dressing tool 54 along its long sides over its Strip the entire height and ensure reliable cooling.
  • cooling channels 25, 26 emerge, which with the Cooling nozzles 25a, 26a are connected.
  • a separate distribution device 30 for the fluid that is to say gaseous or liquid coolant (for example air or water) has the rear side 14 further bores 24a to d and a support surface 27 with two further bores 28a, 28b on.
  • the distributor device 30 is shown in FIGS. 6 and 7. In the exemplary embodiment it is a separate component. However, it can of course also be integrated in the dressing head 10 his.
  • the distributor device 30 is approximately cuboid. On the bottom 32 are Bores (not shown) for fastening the distributor device 30 on the support surface 27 of the dressing head 10 is provided.
  • the distributor device 30 also has four further bores 24a to d corresponding holes 35a to d on the back 14 of the dressing head 10 for attachment to the back 14.
  • the distributor device 30 is provided with two supply channels 36, 37 for the coolant, which after assembling the dressing device 1 into the cooling channels 25, 26 of the dressing head 10 flow out.
  • the feed channels also open into one on the upper side 31 of the distributor device 30 attached coolant connection 38, for example via a hose with a coolant reservoir (e.g. pressure vessel or tank) can be connected.
  • a coolant reservoir e.g. pressure vessel or tank
  • FIG. 8 An embodiment of such Cooling device 40 is shown in FIG. 8. It has a base plate 41 with two elongated holes 42, 43 on. On the base plate 41, a nozzle attachment 44 is arranged, one on its underside Cooling nozzle 45 and has a coolant connection 46 on its upper side. The cooling nozzle 45 is arranged with the tool holder 50 tangent to the tool 54, so that the coolant flow the top edge of the tool 54 grazes and cools.
  • the cross section of the cooling nozzle 45 should be correspond to a maximum of the width of the tool holder 53, better still the width of the tool 54, so that the upper edge of the tool 54 over its entire width from the coolant flow is covered, but the coolant flow does not deflect those emerging from the cooling nozzles 25a, 26a parallel coolant flows.
  • the cooling device 40 is in the bores by means of the elongated holes 42, 43 and screws or the like 22a, 23a or 22b, 23b of the dressing head 10 so that they can be moved along the arrow B (FIGS. 3, 4 and 8) can be axially shifted to the position of the coolant flow the degree of wear or to adapt the dimensions of the tool 54.
  • the dressing head 10 is furthermore in a fork 70 shown in FIG. 9 as an exemplary embodiment attached to adjust its angle of inclination.
  • the fork 70 has a base 71 and two side walls 72, 73, the geometry of the base surface 71 being the cross section of the Dressing head 10, as in the exemplary embodiment, can be adapted.
  • the side walls 72, 73 have two bores 76, 77 on which the bores 18a, 18b in the side surfaces 15, 16 of the dressing head correspond and for receiving an axis of rotation 78, for example in the form of a shaft with a threaded pin, serve by which the dressing head 10 can be rotated to the angle of inclination to adjust.
  • the side walls 71, 72 have two elongated holes 74, 75 which correspond to the bores 17a, 17b in the side surfaces 15, 16 of the dressing head 10 and by means of which the dressing head 10 is guided up to the stop points defined by the elongated holes 74, 75 and the selected angle of inclination of the dressing head 10 can be determined.
  • the fork 70 itself is attached to a base plate 80 ( Figures 1 and 2), the base 71 of the fork 70 has a bore 79 for receiving a fastening screw with a snug fit.
  • the screw also serves as a fulcrum around which the fork 70 on the base plate 80 is radially rotatable along arrow C. This allows a radial adjustment of the dressing head, see above that depending on the workpiece to be machined, different setting angles of the tool 54 are realized can be.
  • the base plate 80 itself has a base surface 82 and a side wall 83.
  • a spring 81 which is used to fix the base plate 80 in the machine bed the machine tool.
  • This spring 81 is guided over a groove in the machine bed. It is attached using two screws, which are fastened with two in the groove of the machine bed attached T-nuts are screwed. By loosening the screws there is an axial one Displacement of the dressing device 1 according to the invention in the machine tool possible that, due to, for example, changed designs of the tool 54 or the one to be machined Workpieces, the dressing device 1 according to the invention can be realigned.
  • the dressing device 1 according to the invention thus permits reliable cooling of the tool 54, can always be in the desired orientation to the workpiece (e.g. in the center of the grinding tool in dressing devices for grinding machines) and is on different Machine tools can be used universally.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Gripping On Spindles (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
EP00119573A 1999-09-08 2000-09-07 Dispositif de dressage Withdrawn EP1083028A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999142732 DE19942732A1 (de) 1999-09-08 1999-09-08 Abrichtvorrichtung
DE19942732 1999-09-08

Publications (2)

Publication Number Publication Date
EP1083028A2 true EP1083028A2 (fr) 2001-03-14
EP1083028A3 EP1083028A3 (fr) 2003-09-17

Family

ID=7921123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00119573A Withdrawn EP1083028A3 (fr) 1999-09-08 2000-09-07 Dispositif de dressage

Country Status (2)

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EP (1) EP1083028A3 (fr)
DE (1) DE19942732A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003492A (en) * 1959-01-12 1961-10-10 Cincinnati Milling Machine Co Diamond nib holder
DD227075A1 (de) * 1984-09-27 1985-09-11 Werkzeugmasch Forschzent Verfahren und einrichtung zur kompensation thermischer verlagerung an zahnflankenschleifmaschinen
DE8716590U1 (de) * 1987-12-16 1988-02-11 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Vorrichtung zum Kühlen von Abrichtwerkzeugen
US5678466A (en) * 1993-03-22 1997-10-21 Wahl; Wilfried Process and a device for lubricating and cooling cutting edges and/or workpieces in machining processes with chip removal, and their use in sawing machines
DE19852304A1 (de) * 1998-11-12 2000-05-18 Volkswagen Ag Verfahren und Halter zur Kühlung eines Abrichtwerkzeuges

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003492A (en) * 1959-01-12 1961-10-10 Cincinnati Milling Machine Co Diamond nib holder
DD227075A1 (de) * 1984-09-27 1985-09-11 Werkzeugmasch Forschzent Verfahren und einrichtung zur kompensation thermischer verlagerung an zahnflankenschleifmaschinen
DE8716590U1 (de) * 1987-12-16 1988-02-11 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Vorrichtung zum Kühlen von Abrichtwerkzeugen
US5678466A (en) * 1993-03-22 1997-10-21 Wahl; Wilfried Process and a device for lubricating and cooling cutting edges and/or workpieces in machining processes with chip removal, and their use in sawing machines
DE19852304A1 (de) * 1998-11-12 2000-05-18 Volkswagen Ag Verfahren und Halter zur Kühlung eines Abrichtwerkzeuges

Also Published As

Publication number Publication date
DE19942732A1 (de) 2001-03-15
EP1083028A3 (fr) 2003-09-17

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