US20150306735A1 - Grinding machine with liquid coolant injection nozzle - Google Patents

Grinding machine with liquid coolant injection nozzle Download PDF

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Publication number
US20150306735A1
US20150306735A1 US14/693,105 US201514693105A US2015306735A1 US 20150306735 A1 US20150306735 A1 US 20150306735A1 US 201514693105 A US201514693105 A US 201514693105A US 2015306735 A1 US2015306735 A1 US 2015306735A1
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US
United States
Prior art keywords
slide
arm
axis
grinding machine
grinding wheel
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
Application number
US14/693,105
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English (en)
Inventor
Eric ALLIN
Pascal GIRAUD
Alexandre KAELIN
Guillaume PELLAT
Gerard RIMBAULT
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SKF AB
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SKF AB
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Assigned to AKTIEBOLAGET SKF reassignment AKTIEBOLAGET SKF ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Allin, Eric, RIMBAULT, GERARD, GIRAUD, PASCAL, Kaelin, Alexandre, Pellat, Guillaume
Publication of US20150306735A1 publication Critical patent/US20150306735A1/en
Abandoned 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
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B24B19/06—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for grinding races, e.g. roller races
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0069—Other grinding machines or devices with means for feeding the work-pieces to the grinding tool, e.g. turntables, transfer means
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/005—Feeding or manipulating devices specially adapted to grinding machines

Definitions

  • This invention relates to a grinding machine which can be used for the grinding of bearing rings and which includes, amongst others, a nozzle to inject a liquid coolant on a peripheral portion of a grinding wheel.
  • This invention aims at solving these problems with a new grinding machine which is adapted to efficiently cool a peripheral portion of its grinding wheel, without needing dedicated nozzles or the use of complicated actuators.
  • the invention concerns a grinding machine for bearing rings, this machine including a frame, a rotating grinding wheel movable in rotation around a first rotation axis and a nozzle adapted to inject a liquid coolant on a peripheral portion of the grinding wheel.
  • the nozzle is mounted on a first slide movable in translation along a second axis perpendicular to the first rotation axis and the position of the slide along the second axis is controlled by a mechanical linkage connected to a movable part of the machine whose position depends on the outer diameter of the grinding wheel.
  • the mechanical linkage adjusts the position of the slide along the guide rail depending on the actual outer diameter of the grinding wheel. This allows taking into account the actual outer diameter of the grinding wheel, without having to use an external actuator, such as a jack or an electric motor, and external sensors and control means.
  • the grinding machine might incorporate one or several of the following features taken in any admissible configuration:
  • FIG. 1 is a front view of a grinding machine according to the invention using a new grinding wheel
  • FIG. 2 is a perspective view corresponding to detail II on FIG. 1 ;
  • FIG. 3 is a partial perspective view of the machine of FIGS. 1 and 2 in another direction;
  • FIG. 4 is a detailed view corresponding to detail IV on FIG. 1 ;
  • FIG. 5 is a back cut view, at a slightly larger scale, of the center of the portion of the machine represented on FIG. 5 ;
  • FIG. 6 is a detailed view similar to FIG. 4 when the grinding wheel is almost worn out.
  • FIG. 7 is a back cut view similar to FIG. 5 when the machine is in the configuration of FIG. 6 .
  • the grinding machine 2 represented on FIGS. 1 to 7 includes a frame 4 and a rotating grinding wheel 6 which rotates around a first rotation axis X 6 .
  • An electric motor 8 is used to drive wheel 6 in rotation around axis X 6 .
  • D 6 denotes the outer diameter of grinding wheel 6 .
  • auxiliary frame 9 which is movable with respect to frame 4 in two opposite directions perpendicular to axis X 6 , as shown by double arrow A 9 on FIG. 1 .
  • Axis X 6 is fixed with respect to auxiliary frame 9 .
  • the outer peripheral surface 10 of grinding wheel 6 is shaped by a knurl 12 when needed and is used to grind the outer surface of an inner ring 500 of a non-further represented bearing.
  • Knurl 12 which is sometimes called “diamant roller”, is also supported by auxiliary frame 9 .
  • outer surface 10 has a central bump, so that it is used to grind the outer radial surface 502 of ring 500 with a concave groove.
  • Grinding machine 2 is provided with a working station or zone 14 where each ring 500 is successively held in position with respect to grinding wheel 6 during a grinding operation.
  • Working station 14 includes two support shoes 16 and 18 , each provided with a fitting 20 , respectively 22 .
  • Fitting 20 is adapted to lie against the outer radial surface of a magnetic clamp 24
  • fitting 22 is made of two parts and adapted to lie against the outer peripheral surface 502 of ring 500 .
  • Each support shoe 16 and 18 is mounted on a slider 26 , respectively 28 .
  • Another slider 30 is used to avoid escape of the ring 500 .
  • each ring 500 When it is loaded in working station 14 , as shown on FIGS. 1 , 2 , 4 and 6 , each ring 500 is centered around a central axis X 24 of magnetic clamp 24 parallel or substantially parallel to axis X 6 .
  • the central bore 504 of ring 500 is empty and, because of the friction between surfaces 10 and 502 , ring 500 is driven in rotation around axis X 24 by the rotation movement of grinding wheel 6 around axis X 6 .
  • arrow R 6 represents the rotation of grinding wheel 6
  • arrow R 500 represents the rotation of ring 500 .
  • a multi-axis robot 100 belongs to the transfer means. It is mounted by its base 102 on the frame 4 of grinding machine 2 and includes a multi-articulated arm 104 whose free end is equipped with a clamp 106 adapted to grasp or grip different types of rings 500 , via a proper programming of robot 100 .
  • a moving arm 200 also belongs to the transfer means. This moving arm 200 is rotatable around an axis X 200 which is fixed with respect to frame 4 and parallel to axis X 6 . Near its free end 204 opposite to axis X 200 moving arm 200 is provided with means for gripping a ring 500 to be moved away from working station 14 .
  • Grinding machine 2 includes an inlet chute 300 where black rings 500 move by gravity in the direction of arrow A 300 .
  • inlet chute 300 is close to robot 100 which can pick-up a ring 500 present in inlet chute 300 when needed.
  • grinding machine 2 also includes an outlet chute 310 where ground rings 500 are dumped, one after the other.
  • outlet chute 310 ground rings 500 move by gravity, in the direction of arrow A 310 .
  • outlet chute 310 is equipped with a releaser 312 provided with a notch 314 of a size sufficient to accommodate the gripping means of moving arm 200 but with a transverse dimension, measured between two lateral edges of this notch, smaller than the outer diameter of the rings 500 .
  • a new grinding wheel 6 is used and its diameter D 6 is about 610 mm.
  • a nozzle 150 is used to inject a given quantity of liquid coolant, such as water, at the interface between surfaces 10 and 502 , which is in the contact area between grinding wheel 6 and bearing ring 500 located in working station 14 .
  • liquid coolant such as water
  • nozzle 150 When grinding wheel 6 has its maximum diameter as shown on FIGS. 1 to 5 , nozzle 150 must be at a distance of axis X 6 which is large enough to avoid a contact between items 6 and 150 . On the other hand, when grinding wheel 6 is almost worn out, as shown on FIGS. 6 and 7 , nozzle 150 must be close enough to outer surface 10 in order to efficiently cool its interaction zone with surface 502 of a ring 500 .
  • this nozzle is connected to a slide 152 which is movable along an axis Y 154 perpendicular to axis X 6 and defined by a guide rail 154 mounted on a support structure formed of two support plates 156 and 158 . These two support plates move together with auxiliary frame 7 which supports grinding wheel 6 .
  • knurl 12 is supported by a support structure which includes a bracket 162 , a support plate 164 and a spacer 166 .
  • This support structure hangs down from a dressing slide 170 which is mounted on support plate 158 with a possibility of translation along an axis Y 170 perpendicular to axis X 6 . Since knurl 12 lies against outer surface 10 of grinding wheel 6 when it is used to shape this surface, the position of dressing slide along axis Y 170 is automatically adjusted, as a function of the diameter D 6 of grinding wheel 6 .
  • a rod 172 is slidely mounted within a parallelepidal housing 174 fixed on plate 156 .
  • One end 176 of rod 172 is provided with a screw 178 whose head 180 lies against a front surface 182 of dressing slide 170 , this front surface 182 being perpendicular to axis Y 170 .
  • a spring 184 is mounted around rod 172 and compressed between housing 174 and a washer 186 rigidly mounted at end 176 . Thanks to this construction, a movement of dressing slide 170 to the left of FIGS. 1 and 2 , which corresponds to a decrease in the value of diameter D 6 , is transmitted to rod 172 which slides within housing 174 , because front surface 82 pushes head 180 .
  • spring 184 pushes washer 186 and rod 172 towards front surface 182 .
  • spring 184 guarantees a permanent contact between head 180 and front surface 182 .
  • a lever 190 is articulated on support plate 156 around an axis X 190 parallel to axis X 6 .
  • This lever is formed of two arms 192 and 194 which extend along two radial directions with respect to axis X 190 .
  • a first longitudinal slot 196 is provided in first arm 192 and a second longitudinal slot 198 is provided in second arm 194 .
  • Each slot has its longitudinal direction parallel to the longitudinal direction of the arm in which it is machined, that is radial with respect to axis X 190 .
  • a pin 202 mounted on slide 152 is engaged within first slot 196 .
  • first arm 192 is articulated on first slide 152 around the longitudinal axis X 202 of pin 202 .
  • a pin 204 crosses rod 172 and two longitudinal slots 174 A and 174 B formed on either side of housing 174 and parallel to axis Y 170 . Pin 204 is also engaged into second slot 198 , so that second arm 194 is articulated on rod 172 around the central axis X 204 of pin 204 which is also parallel to axis X 6 .
  • a distance d 1 denotes the distance, measured radially with respect to axis X 190 , between axes X 190 and X 202 .
  • d 2 denotes the distance, measured radially with respect to axis X 190 , between axes X 190 and X 204 .
  • Distances d 1 and d 2 are equal.
  • a hollow tube 210 connects slide 152 to nozzle 150 .
  • This tube 210 supports nozzle 150 in cantilever manner with respect to slide 152 . This allows feeding nozzle 150 with water under a pressure of about 3 bars via hollow tube 210 .
  • slide 152 On its side opposite to nozzle 150 , slide 152 is provided with a fitting 212 for the connection of a coolant inlet tube 214 where water under pressure circulates, as shown by arrow A 1 on FIG. 3 .
  • a non represented channel, internal to slide 152 connects fitting 212 to tube 210 .
  • the flow rate of water within tubes 214 and 210 and the internal channel of slide 152 can be chosen so that water coming out of nozzle 150 , as shown by arrow A 2 , has a velocity of about 80 m/s. This velocity is constant, irrespective of the dimension of grinding wheel 6 , because the outlet orifice of nozzle 150 is not modified since no direct contact takes place between items 6 and 150 .
  • knurl 12 When one loads a new grinding wheel 6 on grinding machine 2 , knurl 12 must be moved away from working station 14 , which induces a translation movement of dressing slide 170 in the direction of arrow A 3 on FIG. 4 .
  • dressing slide 170 moves away from housing 174 .
  • This movement induces that washer 186 is pushed by spring 184 away from housing 174 , which brings lever 190 in the configuration of FIGS. 3 and 5 where pin 204 is close to a first end 174 B 1 of slot 174 B, oriented towards dressing slide 170 , and slide 152 is pushed in a position relatively away from axis X 6 .
  • grinding wheel 6 Upon use of grinding machine 2 , grinding wheel 6 must regularly be reshaped via knurl 12 , which induces that its diameter diminishes. Thus, knurl 12 moves closer to axis X 6 , which induces a translation movement of dressing slide 170 in the direction of arrow A 4 , along axis Y 170 . This translation movement induces that rod 172 is pushed within housing 174 and that pin 204 moves away from the first end 174 B 1 of slot 174 B. This axial movement of pin 204 along axis Y 170 induces a rotational movement of lever 190 around axis X 190 , in the direction of arrow R 1 on FIG. 5 .
  • the position of nozzle 150 is automatically adjusted, as a function of the outer diameter D 6 of grinding wheel 6 .
  • the elastic effort of spring 184 acts on washer 186 in a direction towards dressing slide 170 , which tends to move lever 190 towards the configuration of FIGS. 1 to 5 and to keep nozzle 150 away from grinding wheel 6 .
  • the articulation mechanism between lever 190 , slide 152 and rod 174 can be inverted.
  • the pins can be provided on the lever and corresponding slots can be provided on items 152 and 174 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US14/693,105 2014-04-25 2015-04-22 Grinding machine with liquid coolant injection nozzle Abandoned US20150306735A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14305617.4 2014-04-25
EP14305617.4A EP2937174A1 (de) 2014-04-25 2014-04-25 Schleifmaschine mit Kühlflüssigkeits-Einspritzdüse

Publications (1)

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US20150306735A1 true US20150306735A1 (en) 2015-10-29

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US14/693,105 Abandoned US20150306735A1 (en) 2014-04-25 2015-04-22 Grinding machine with liquid coolant injection nozzle

Country Status (4)

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US (1) US20150306735A1 (de)
EP (1) EP2937174A1 (de)
JP (1) JP2015208849A (de)
CN (1) CN105014522A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117245558A (zh) * 2023-11-10 2023-12-19 湖南中大创远数控装备有限公司 磨床

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111975637B (zh) * 2020-07-24 2022-06-21 湖南中大创远数控装备有限公司 一种砂轮冲洗装置及数控机床

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543451A (en) * 1967-10-26 1970-12-01 Day Ton Progress Corp Accessory for machine tools
US4151684A (en) * 1976-10-15 1979-05-01 Toyoda-Koki Kabushiki-Kaisha Grinding machine with a re-truing device
US4314425A (en) * 1980-07-10 1982-02-09 Litton Industrial Products, Inc. Coolant assembly for a cylindrical grinding machine
US6585564B1 (en) * 1999-11-15 2003-07-01 Makino Milling Co., Ltd Machine tool device and its working fluid feed device
US6666748B2 (en) * 2000-09-04 2003-12-23 Makino Milling Machine Co., Ltd Machining center and method of changing tools thereof
US20040072521A1 (en) * 2002-10-11 2004-04-15 Pflager William Wood Apparatus and method for positioning a device near a workpiece during machining operations
US20060068683A1 (en) * 2004-09-29 2006-03-30 Kabushiki Kaisha Toshiba Machining apparatus using a rotary machine tool to machine a workpiece
US20070202776A1 (en) * 2006-02-28 2007-08-30 Reishauer Ag Process for monitoring the setting of the coolant nozzle of a grinding machine
US20080219781A1 (en) * 2007-03-01 2008-09-11 Mori Seiki Usa, Inc. Machine Tool With Cooling Nozzle and Method for Applying Cooling Fluid
US20130095734A1 (en) * 2011-10-06 2013-04-18 Rolls-Royce Plc Grinding apparatus with a slot nozzle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930247A1 (de) * 1989-09-11 1991-03-21 Herminghausen Werke Gmbh Kuehlvorrichtung fuer eine spitzenlose rundschleifmaschine
WO2008074174A1 (fr) * 2006-12-19 2008-06-26 Robotic Consulting S.A.R.L. Dispositif d'alimentation automatique d'un poste d'usinage d'une machine-outil en pieces de mecanique
KR20080062886A (ko) 2006-12-29 2008-07-03 삼성전자주식회사 직교 주파수 다중 접속 방식의 이동통신 시스템에서 순방향공유 제어 채널에 대한 역방향 제어채널 응답 채널 전송방법 및 장치

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543451A (en) * 1967-10-26 1970-12-01 Day Ton Progress Corp Accessory for machine tools
US4151684A (en) * 1976-10-15 1979-05-01 Toyoda-Koki Kabushiki-Kaisha Grinding machine with a re-truing device
US4314425A (en) * 1980-07-10 1982-02-09 Litton Industrial Products, Inc. Coolant assembly for a cylindrical grinding machine
US6585564B1 (en) * 1999-11-15 2003-07-01 Makino Milling Co., Ltd Machine tool device and its working fluid feed device
US6666748B2 (en) * 2000-09-04 2003-12-23 Makino Milling Machine Co., Ltd Machining center and method of changing tools thereof
US20040072521A1 (en) * 2002-10-11 2004-04-15 Pflager William Wood Apparatus and method for positioning a device near a workpiece during machining operations
US20060068683A1 (en) * 2004-09-29 2006-03-30 Kabushiki Kaisha Toshiba Machining apparatus using a rotary machine tool to machine a workpiece
US20070202776A1 (en) * 2006-02-28 2007-08-30 Reishauer Ag Process for monitoring the setting of the coolant nozzle of a grinding machine
US20080219781A1 (en) * 2007-03-01 2008-09-11 Mori Seiki Usa, Inc. Machine Tool With Cooling Nozzle and Method for Applying Cooling Fluid
US20130095734A1 (en) * 2011-10-06 2013-04-18 Rolls-Royce Plc Grinding apparatus with a slot nozzle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117245558A (zh) * 2023-11-10 2023-12-19 湖南中大创远数控装备有限公司 磨床

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JP2015208849A (ja) 2015-11-24
EP2937174A1 (de) 2015-10-28
CN105014522A (zh) 2015-11-04

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Owner name: AKTIEBOLAGET SKF, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ALLIN, ERIC;GIRAUD, PASCAL;KAELIN, ALEXANDRE;AND OTHERS;SIGNING DATES FROM 20150511 TO 20150518;REEL/FRAME:035692/0231

STCB Information on status: application discontinuation

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