US3256647A - Means for cleaning and cooling grinding apparatus - Google Patents

Means for cleaning and cooling grinding apparatus Download PDF

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Publication number
US3256647A
US3256647A US29727963A US3256647A US 3256647 A US3256647 A US 3256647A US 29727963 A US29727963 A US 29727963A US 3256647 A US3256647 A US 3256647A
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US
United States
Prior art keywords
grinding
hood
wheel
deflector plate
nozzle
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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.)
Expired - Lifetime
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English (en)
Inventor
Hutton Norman Horatio
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Hydrol Chemical Co Ltd
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Hydrol Chemical Co Ltd
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Publication date
Priority claimed from GB2880060A external-priority patent/GB907934A/en
Application filed by Hydrol Chemical Co Ltd filed Critical Hydrol Chemical Co Ltd
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    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/007—Cleaning of grinding wheels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/242—With means to clean work or tool

Definitions

  • FIG. Ia MEANS FOR CLEANING AND COOLING GRINDING APPARATUS Filed July 24, 1963 2 Sheets-Sheet 1 M FIG. Ia
  • This invention relates to the grinding of metals, ceramics and other materials which have to be subjected to abradin-g in the course of manufacture and has for its object to provide an improved construction or arrang ment designed to ensure the removal of accumulated debris including swarf, gritty material and other waste substances removed from a work-piece by abrasion and which would tend in the course of time to impede the grinding operation or cause deterioration of the surface of a grinding element.
  • the present invention provides a grinding arrangement having a jet or jets for the introduction of grinding fluid additional to the normal supply of fluid to a work-piece and so arranged that the fluid impinging on the surface of a rotary grinding element will loosen any solid deposits and thereby maintain the surface of the grinding element clean and facilitate the ultimate removal of waste material 'from the grinding apparatus.
  • FIGURE 1 illustrates in elevation one construction according to the invention and FIGURE 1a is a fragmentary elevation of a modified construction
  • FIGURE 2 is an elevation illustrating a further modification
  • FIGURE 3 illustrates a modification of the adjust-able deflector plate shown in FIGURE 2.
  • a rotary grinding wheel a is disposed within a hood b shaped to enable a workpiece cI to be brought into contact with the grinding wheel at c in the usual manner.
  • Hood b essentially is of conventional construction having a semi-circular, uniformly diametered plate portion b1 and depending flat sided parallel skirt portions b2 and b3. Portion bit is radially spaced from the periphery of wheel a and portions b2 extend over opposite sides of the grinding wheel as shown.
  • the space between hood port-ion b1 and the periphery of wheel a is made relatively narrow for a purpose to be presently explained in detail.
  • a suitable nozzle 02 disposed externally of hood b conventionally is adapted to supply coolant liquid to the region where workpiece c1 engages the periphery of grinding wheel a.
  • centrifugal force set up by the rotation of the grinding wheel tendsto dislodge residues from the grinding wheel but also to cause such residues to accumulate against the interior surfaces of the hood b. If these residues become detached from the interior surfaces of the hood and fall upon the grinding wheel they will detract from the efficient cutting action of the abrasive surfaces of the wheel.
  • the present ice invention provides additional means other than at the point c where the workpiece is actually abraded to detach the debris from the grinding face of the wheel a and prevent the accumulation of grinding residues within the hood b.
  • the means employed for removing debris as shown in FIGURE 1 comprises a liquid coolant supply system having a discharge conduit (or a number of discharge conduits) a disposed in the upper part of the hood I) and to which the coolant fluid is supplied by the action of a pump 2 which withdraws the fluid from a storage tank f and passes it through a pipe g to the conduit d which is provided with a control valve h.
  • conduit d comprises a straight tube d1 extending radially into hood portion b1 and terminating in a nozzle or jet i within the confined space between hood portion b1 and the periphery of wheel a.
  • nozzle i is located at a point in the hood portion 121 remote from the work piece and opens to direct the liquid coolant jet radially inwardly.
  • the fluid is pumped through the nozzle 1 at such temperature and pressure as to eject coolant liquid in the form of a jet whose impact on the surface of the grinding wheel causes the debris to be dislodged from the grinding surface whilst atomization of the grinding fluid induced by the rotation of the abrasive wheel will counteract any tendency of the debris to accumulate and become attached either to the wheel or to the interior of the hood.
  • the control valve 11 enables the volume of grinding fluid-to be adjusted to suit the character of the material of the work-piece under treatment.
  • the arrangement above described in addition to ensuring removal of waste residues possesses the further advantage that the wetting by the grinding fluid of the wheel surface and subsequent absorption of the fluid into the matrix and interstices of the wheel produces conditions whereby the temperature in the cutting area at c is red-uced by the previously absorbed grinding fluid travelling out-wards by centrifugal force between the wheel and the work-piece.
  • the reduction of temperature in the cutting area in conjunction with the re-absorption of coolant deflected by hood [2 onto the periphery of the grinding wheel tends to avoid distortion of the work-piece or metallurgical change and in addition promotes detachment of debris by contraction while residual coolant will be cushioned between the wheel and the Work-piece to lower the cutting temperature.
  • coolant liquid is introduced through the additional nozzle i within hood a as previously described. Owing to the narrow space between the peripheral surface of the grinding wheel and the inner surface of hood position b1, the liquid introduced through the nozzle i is not immediately lost but due to its velocity and the speed of rotation of the wheel the liquid rebounds or ricochets between the two opposed surfaces as indicated at d2 and is thus brought into repeated and intimate contact with the surface of the wheel, thereby cooling that surface sufliciently to loosen the accumulated debris which is eventually washed away as the liquid finally flows out of the space between the hood and the wheel.
  • the grinding arrangements above described also possess the advantage of reducing the need for dressing the abrading surface resulting in more continuous production, higher output and better surface finishes than have been possible with arrangements hitherto employed.
  • a rotary grinding element a is disposed within a housing or hood [2' with means external thereto for bringing a workpiece c1 into contact with the grinding surface as described with reference to FIG. 1.
  • Coolant liquid is directed by a nozzle c2 onto the area of contact between the workpiece c1 and the grinding element a in the normal manner and in addition a discharge conduit d for coolant liquid is also arranged within the hood b for directing such liquid either radially or tangentially onto the surface of the grinding element over an area remote from the position of the workpiece
  • Hood b and conduit d are respectively of the same construction as hood b and conduit d with like reference characters identifying like elements.
  • the present invention provides a deflector l conveniently in the form of a plate of curvature concentric with that of the grinding element and hood within which the deflector plate is adjustably mounted so that it can be moved at intervals to maintain a position in predetermined concentric relationship with the grinding element a as the diameter thereof gradually decreases during use.
  • the deflector plate I can occupy a position in contact wtih the inner surface of the hood and thereafter by slackening the set screw 0 the deflector plate I and conduit d can be moved inwards at intervals to maintain them in approximately constant spacing from the grinding wheel surface, their position being maintained by tightening the set-screw 0 after each each adjustment.
  • the push rods 1) and p shown in FIG. 2 are mounted in sleeves q and q carried by the hood b through which they project so that as the deflector plate is moved inwards pressure can also be applied to the push rods to bend the ends of the deflector plate to increase its curvature and maintain it in substantially concentric relationship with the grinding whel.
  • the push rods can be secured in their adjusted position by clamping screws 1' and r' passing through the sleeves q and q and carrying wing rods s and s for manual operation.
  • the deflector plate I must be so arranged as to ensure ricochet of the jet stream and diffusion on to the peripheral area. This can be contrived in two ways:
  • the deflector plate I can be interchangeable so as to approximate the radius of the grinding element as it wears away by the process of abrasion.
  • a compromise solution by using a single deflector plate could be used, the radius of which would be based on the estimated diameter of the grinding wheel at the termination of its useful life. For instance with a 24" diameter wheel, the radial distance to the periphery of the wheel would be 12". The radius of the deflector would be made to conform to the estimated diameter of its useful life, which would be estimated to be 18" in diameter. The radius of the deflector would thus be made to conform to a wheel size of approximately 18". This would be adjusted to suit a new wheel so as to a ensure the extreme ends of the deflector to maintain a small working clearance of approximately a sixteenth of an inch.
  • the arrangement shown in FIG. 2 ensures that the jet stream is always directed where it will penetrate the air flow generated by the high speed of the grinding wheel and thereby make contact with the wheel periphery with sufficient force to enter the surface pores of the wheel.
  • the coolant liquid introduced through the jet in the plate is not immediately lost, but due to its velocity and the speed of rotation of the wheel, the liquid rebounds or ricochets between the surfaces of the wheel and the plate and is thus brought into repeated and intimate contact with the surface of the wheel, thereby cooling that surface sufliciently to loosen the accumulated debris which is eventually washed away as the liquid flows out of the space between the deflector plate and the wheel.
  • the invention possesses the further advantage that the cooling of the grinding wheel surface and its preservation in a good grinding condition maintains efficient operation and prevents overheating, distortion or deterioration of the workpiece.
  • the hood above described may embody two stationary baffles arranged to deflect surplus liquid which is caused to fall through the base of the hood thereby protecting the operator from such liquids being thrown outwards by rotation of the wheel in the region of the workpiece.
  • a further modification resides in the provision of a slot f in the deflector plate to allow coolant to pass into the space external to the deflector plate and operate to remove any debris which may tend to accumulate on the inner surface of the hood.
  • a rotatably mounted grinding element means for supplying coolant liquid to the grinding area where a workpiece is brought into contact with said element, a hood partially enclosing said grinding element, a nozzle mounted in the hood for directing a jet of coolant liquid against the periphery of said grinding element within said hood, a curved deflector plate mounted within the hood concentrically with the grinding element, means for adjusting the positions of said nozzle and deflector plate, said means for adjusting the position of said deflector plate being effective to enable the radial distance of the space between said deflector plate and the periphery of the grinding element to be varied as the diameter of said grinding element becomes reduced by wear and means for securing the said nozzle and deflector plate in their adjusted positions.
  • hood means partially receiving said grinding wheel and having a deflector surface facing and spaced from the periphery of said wheel to define a narrow space therewith, means providing a supply of liquid coolant, a nozzle connected to said supply and disposed in said space to direct a jet of coolant liquid of predetermined velocity against the periphery of said grinding wheel covered by said hood means to penetrate into the periphery of said grinding wheel, said nozzle and deflector surface being so arranged that said jet repeatedly rebounds back and forth between said deflector surface and said wheel over a predetermined peripheral segment of said wheel in said space.
  • hood means comprises a hood and curved plate flector surface for radial displacement independently of each other to compensate for wear of said wheel.
  • a grinding apparatus having a rotatably mounted grinding wheel, a hood partially receiving said grinding wheel and being spaced from the periphery thereof, plate means disposed radially between said hood and the periphery of said grinding wheel and having a curved deflector surface facing and concentrically spaced radially from the periphery of said grinding wheel to delimit a narrow space therewith, means providing a supply of liquid coolant, a nozzle connected to said supply of liquid coolant and disposed in said narrow space to direct a jet of coolant liquid of predetermined velocity against the periphery of said grinding wheel covered by said hood, said nozzle and said deflecting surface being so arranged that said jet repeatedly rebounds back and forth between said deflector surface and the periphery of said grinding wheel over a predetermined peripheral segment of said grinding wheel in said narrow space, and means adjustably mounting said plate means for radial displacement relative to said grinding wheel to enable the radial distance of said narrow space to be varied to compensate for wear of said wheel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
US29727963 1960-08-19 1963-07-24 Means for cleaning and cooling grinding apparatus Expired - Lifetime US3256647A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2880060A GB907934A (en) 1960-08-19 1960-08-19 Improvements in or relating to grinding apparatus
FR870842A FR1301500A (fr) 1960-08-19 1961-08-16 Machine à meuler

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334451A (en) * 1965-04-09 1967-08-08 Hutton Norman Horatio Grinding apparatus
US3395492A (en) * 1964-04-02 1968-08-06 Klingelnberg Soehne Ferd Tool grinding machine with wet grinding device
US4153973A (en) * 1976-01-26 1979-05-15 Armour And Company Tool for cutting materials and methods for sterilizing the same
US4176500A (en) * 1976-09-24 1979-12-04 Centre Technique Des Industries Mecaniques Sprinkling device for grinding wheels
US4320600A (en) * 1979-07-19 1982-03-23 Centre Technique Des Industries Mecaniques Sprinkling device for grinding wheels
US5140780A (en) * 1991-08-12 1992-08-25 Star Cutter Company Method and apparatus for cleaning and cooling a machine tool and workpiece
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
US5826478A (en) * 1995-12-06 1998-10-27 Andreas Stihl Ag & Co. Nozzle for supplying a liquid to a rotating tool
US6196902B1 (en) * 1999-04-29 2001-03-06 Vidrio Plano De Mexico, S.A. De C.V. Apparatus for finishing the edge of a sheet of glass
US6260336B1 (en) * 1996-09-03 2001-07-17 Tetra Laval Holdings & Finance, S.A. Cutter cleaning device for charging machine
US20030005919A1 (en) * 2000-11-08 2003-01-09 Ralf Hammer Device and method for separating materials
US6561877B1 (en) * 2000-08-11 2003-05-13 Taiwan Semiconductor Manufacturing Co., Ltd. Apparatus and method for retaining moisture on a polishing pad
US20040011171A1 (en) * 2001-10-30 2004-01-22 Hamilton Ernest J. Blade assembly cover
US20090000446A1 (en) * 2005-12-20 2009-01-01 Claus Jeppesen Machine Tool
CN103612206A (zh) * 2013-11-29 2014-03-05 董朝新 一种用于平面磨床砂轮的分流板式弓形喷头的组装方法
US20140099870A1 (en) * 2012-10-09 2014-04-10 Samsung Display Co., Ltd. Grinding apparatus for a substrate
US20150158144A1 (en) * 2012-05-22 2015-06-11 Satisloh Ag Centering Machine For Workpieces, Particularly Optical Lenses
JP5969720B1 (ja) * 2016-02-17 2016-08-17 日本精工株式会社 研削装置
ES2630366A1 (es) * 2016-02-17 2017-08-21 Germans Boada, S.A. Tapa de protección con refrigeración para discos de cortadoras
US20200130125A1 (en) * 2017-06-30 2020-04-30 Essilor International Application device and method to clean grinding surfaces in a machine for grinding ophthalmic lenses
US10994444B2 (en) * 2015-08-17 2021-05-04 Chao-Ying LEE Power saw blade cooling arrangement
US20210347009A1 (en) * 2020-05-07 2021-11-11 Disco Corporation Grinding apparatus
US11376756B2 (en) * 2019-12-17 2022-07-05 Germans Boada, S.A. Cooling device for disc cutters

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625286A1 (de) * 1996-06-25 1998-01-02 Kapp Werkzeugmasch Verfahren und Vorrichtung zum Versorgen der Zusammenwirkzone zwischen einem Abrasivwerkzeug und einem Werkstück mit Kühlschmiermittel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US385666A (en) * 1888-07-03 Island
DE701220C (de) * 1938-11-25 1941-01-11 Herbert Lindner Fa Aussenschleifmaschine, insbesondere Gewindeschleifmaschine, mit einer ueber der Schleifstelle angeordneten Austrittsduese fuer die Kuehlfluessigkeit und einer Spritzduese fuer die Reinigung der schlei Schleifscheibe
US2307019A (en) * 1941-03-22 1943-01-05 Bridgeport Safety Emery Wheel Coolant control for cutoff machines
US2361550A (en) * 1944-02-03 1944-10-31 Hammond Machinery Builders Inc Grinding machine
US3123950A (en) * 1964-03-10 Ultrasonic cleaning of grinding wheels

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US385666A (en) * 1888-07-03 Island
US3123950A (en) * 1964-03-10 Ultrasonic cleaning of grinding wheels
DE701220C (de) * 1938-11-25 1941-01-11 Herbert Lindner Fa Aussenschleifmaschine, insbesondere Gewindeschleifmaschine, mit einer ueber der Schleifstelle angeordneten Austrittsduese fuer die Kuehlfluessigkeit und einer Spritzduese fuer die Reinigung der schlei Schleifscheibe
US2307019A (en) * 1941-03-22 1943-01-05 Bridgeport Safety Emery Wheel Coolant control for cutoff machines
US2361550A (en) * 1944-02-03 1944-10-31 Hammond Machinery Builders Inc Grinding machine

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395492A (en) * 1964-04-02 1968-08-06 Klingelnberg Soehne Ferd Tool grinding machine with wet grinding device
US3334451A (en) * 1965-04-09 1967-08-08 Hutton Norman Horatio Grinding apparatus
US4153973A (en) * 1976-01-26 1979-05-15 Armour And Company Tool for cutting materials and methods for sterilizing the same
US4176500A (en) * 1976-09-24 1979-12-04 Centre Technique Des Industries Mecaniques Sprinkling device for grinding wheels
US4320600A (en) * 1979-07-19 1982-03-23 Centre Technique Des Industries Mecaniques Sprinkling device for grinding wheels
US5140780A (en) * 1991-08-12 1992-08-25 Star Cutter Company Method and apparatus for cleaning and cooling a machine tool and workpiece
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
US5826478A (en) * 1995-12-06 1998-10-27 Andreas Stihl Ag & Co. Nozzle for supplying a liquid to a rotating tool
US6260336B1 (en) * 1996-09-03 2001-07-17 Tetra Laval Holdings & Finance, S.A. Cutter cleaning device for charging machine
US6196902B1 (en) * 1999-04-29 2001-03-06 Vidrio Plano De Mexico, S.A. De C.V. Apparatus for finishing the edge of a sheet of glass
US6561877B1 (en) * 2000-08-11 2003-05-13 Taiwan Semiconductor Manufacturing Co., Ltd. Apparatus and method for retaining moisture on a polishing pad
US20030005919A1 (en) * 2000-11-08 2003-01-09 Ralf Hammer Device and method for separating materials
US20040011171A1 (en) * 2001-10-30 2004-01-22 Hamilton Ernest J. Blade assembly cover
US6886441B2 (en) 2001-10-30 2005-05-03 Micron Technology, Inc. Blade assembly cover
US6990880B2 (en) 2001-10-30 2006-01-31 Micron Technology, Inc. Method for using a blade assembly cover
US20060169113A1 (en) * 2001-10-30 2006-08-03 Hamilton Ernest J Blade assembly cover
US20090000446A1 (en) * 2005-12-20 2009-01-01 Claus Jeppesen Machine Tool
US10625398B2 (en) * 2012-05-22 2020-04-21 Satisloh Ag Centering machine for workpieces, particularly optical lenses
US20150158144A1 (en) * 2012-05-22 2015-06-11 Satisloh Ag Centering Machine For Workpieces, Particularly Optical Lenses
US20140099870A1 (en) * 2012-10-09 2014-04-10 Samsung Display Co., Ltd. Grinding apparatus for a substrate
CN103612206B (zh) * 2013-11-29 2016-01-27 董朝新 一种用于平面磨床砂轮的分流板式弓形喷头的组装方法
CN103612206A (zh) * 2013-11-29 2014-03-05 董朝新 一种用于平面磨床砂轮的分流板式弓形喷头的组装方法
US10994444B2 (en) * 2015-08-17 2021-05-04 Chao-Ying LEE Power saw blade cooling arrangement
JP5969720B1 (ja) * 2016-02-17 2016-08-17 日本精工株式会社 研削装置
CN108698187A (zh) * 2016-02-17 2018-10-23 日本精工株式会社 磨削装置
WO2017141461A1 (fr) * 2016-02-17 2017-08-24 日本精工株式会社 Appareil de rectification
ES2630366A1 (es) * 2016-02-17 2017-08-21 Germans Boada, S.A. Tapa de protección con refrigeración para discos de cortadoras
US11298790B2 (en) 2016-02-17 2022-04-12 Nsk Ltd. Method of manufacturing rolling bearing, method of manufacturing vehicle and method of manufacturing machine
US20220184769A1 (en) * 2016-02-17 2022-06-16 Nsk Ltd. Method of manufacturing rolling bearing, method of manufacturing vehicle and method of manufacturing machine
US11534884B2 (en) * 2016-02-17 2022-12-27 Nsk Ltd. Method of manufacturing rolling bearing, method of manufacturing vehicle and method of manufacturing machine
US20200130125A1 (en) * 2017-06-30 2020-04-30 Essilor International Application device and method to clean grinding surfaces in a machine for grinding ophthalmic lenses
US11376756B2 (en) * 2019-12-17 2022-07-05 Germans Boada, S.A. Cooling device for disc cutters
US20210347009A1 (en) * 2020-05-07 2021-11-11 Disco Corporation Grinding apparatus

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Publication number Publication date
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