US3553910A - Grinding apparatus - Google Patents
Grinding apparatus Download PDFInfo
- Publication number
- US3553910A US3553910A US621048A US3553910DA US3553910A US 3553910 A US3553910 A US 3553910A US 621048 A US621048 A US 621048A US 3553910D A US3553910D A US 3553910DA US 3553910 A US3553910 A US 3553910A
- Authority
- US
- United States
- Prior art keywords
- coolant
- grinding
- glass
- grinding wheel
- hood
- 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.)
- Expired - Lifetime
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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
- B24B55/06—Dust extraction equipment on grinding or polishing machines
-
- 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
Definitions
- the apparatus includes a grinding wheel, coolant feed means for feeding a coolant to the grinding wheel, a hood enclosing the grinding wheel and having a slot for receiving the edge of the glass sheet, and means for drawing air around, over, and beneath the sheet of glass in such a manner that substantially all of the coolant is prevented from leaving the hood with the glass sheet.
- the method includes feeding a coolant to a grinding wheel enclosed in a hood, contacting the grinding wheel with the edge of the glass sheet, and drawing air around, over, and beneath the glass sheet in such a manner that substantially all of the coolant is prevented from leaving the hood.
- grinding apparatus WhlCh includes means for controlling coolant splash during the process of edge grinding glass.
- the objects of the invention are accomplished by provlding a hooded grinding Wheel, feeding a coolant to the grinding wheel, and drawing the coolant away from the glass sheet and preventing it from flowing out over the sheet or misting into the atmosphere.
- FIGS. 1-3 of the drawings there is shown apparatus for wet-grinding the edges of a pane or sheet 11 of glass which comprises a grinding wheel 13, a hood 15 enclosing grinding wheel 13 and having a slot 17 formed therein for receiving glass pane 11 so that its edge may contact the grinding edge of wheel 13, coolant feed means for feeding a coolant 19, which may be water, to the grinding wheel, and vacuum means for drawing the coolant 19 and preventing it from flowing out over the pane 11.
- a coolant 19 which may be water
- Grinding wheel 13 is mounted on a spindle which extends from a motor 21 and is positioned so that it rotates in a horizontal plane.
- Slot 17 is parallel to the plane of grinding wheel 13 and includes a front slot 23 in the front of hood 15, and side slots 25 which are formed in the sides of the hood.
- a coolant tank 27 is positioned below hood 15, and the coolant feed means includes a pump 29 positioned in the tank 27, and a coolant feed pipe 31 which extends from the pump 29 and terminates in a coolant outlet 33 that is positioned in close proximity to grinding wheel 13.
- Outlet 33 directs the coolant 19 substantially tangentially to the periphery of wheel 13, and the wheel rotates in a direction away from coolant outlet 33. Accordingly, the periphery of wheel 13 picks up coolant 19 before contacting the edge of pane 11 and then the wheel throws off the coolant 19 after it has contacted the pane edge.
- the vacuum means which draws off the coolant and prevents it from runnig over the pane includes a fan 35 which has an exhaust opening 37, a suction pipe 39 connecting hood to fan 35 for exhausting the coolant from the hood, and a drain pipe 41 connecting the suction pipe 39 to the coolant tank 27 for returning the used coolant 19 to the tank.
- the edge of pane 11 is inserted into slot 17 which acts as a glass and air entrance.
- the coolant 19 is directed substantially tangentially to the grinding edge of wheel 13 which picks up the coolant on its surface.
- the grinding edge of the wheel 13 contacts the edge of the pane 11 and grinds it to the desired finish.
- the coolant 19 dissipates the heat during this grinding operation and then is carried by the rotation of the wheel to a point past the grinding area and is thrown into the interior of hood 15.
- the vacuum caused by fan 35 draws air into hood 15 through slot 17. This air flow prevents any coolant 19 or mist created by the grinding operation from leaving the hood 15 through the glass entry slot 17, and also prevents the coolant 19 from flowing out over the large fiat surfaces of the glass pane.
- drain pipe 41 The lower end of drain pipe 41 is positioned below coolant level 43 so as to maintain the vacuum, or negative pressure, in hood 15 and suction pipe 39.
- the fan 35 develops about nine inches of water suction, so that the level 45 of coolant in drain pipe '41 is about nine inches above coolant level 43.
- the air in suction pipe 39 passes through fan 35, the negative pressure developing device, and is discharge-d to the atmosphere through exhaust opening 37. If desired, this air may be discharged through exhaust opening 37 through a filter to remove any entrapped mist.
- Another advantage of the invention is that it provides a solution to the major problem of handling the coolant so as to eliminate coolant splash.
- the operators of the grinding apparatus had to wear aprons and gloves which soon became soggy from the coolant which ran over the pane or sheet of glass.
- the new invention makes the use of such protective aprons and gloves unnecessary, and thus provides for better working conditions.
- FIGS. l3 of the drawings shows the use of an external centrifugal fan. It will be realized that other means of providing the suction may be used, such as mounting a fan impeller on the grinding wheel itself or on the grinding wheel spindle so that the source of power for the grinding wheel would also provide power to operate the suction producing means.
- FIG. 4 there is shown apparatus for wet grinding edges of a pane or sheet of glass 51 which comprises a grinding wheel 53 that is mounted on a spindle 55 driven by a motor 57.
- Grinding wheel 53 is enclosed by a hood 59 that is provided with a front entrance slot 61 and side entrance slots 63 that receive the glass sheet so that its edge may contact grinding wheel 53 and be ground thereby.
- Coolant feed means are provided for feeding a coolant 65, which may be water, to grinding wheel 53, and a vacuum means is provided for drawing the coolant 65 away from the surfaces of the sheet of glass 51 so as to prevent the coolant from spreading over the pane of glass.
- a coolant 65 which may be water
- the coolant feed means includes a coolant tank 67 positioned below grinding wheel 53 and connected to hood 59 by a housing 69 which forms a chamber in which is mounted a pump 71.
- An inlet pipe 73 connects the coolant 65 in tank 67 to pump 71, and a coolant feed tube 75 extends from pump 71 to the periphery of grinding wheel 53 and directs the coolant onto the wheel in a tangential fashion.
- Pump 71 is driven by a shaft 77 which is in turn driven through a belt 79 by a shaft 81 extending upwardly from motor 57.
- the vacuum means includes a fan impeller 83 mounted on shaft 81 of motor 57. Impeller 83 draws air from slots 61 and 63 through hood 59 and housing 69, and through a chamber 85 formed by a housing 87 between motor 57 and fan housing 89.
- Fan impeller 83 also draws air through openings 91 in the bottom of motor 57 upwardly through the motor to cool the motor, and then through chamber 85 into fan housing 89.
- a filter may be positioned in the path of the coolant 65 being drawn from the sheet of glass 51 by the vacuum means.
- the filter may include a roll 93 of filter paper mounted above hood 59, with a continuous sheet 95 of filter paper extending downwardly across the hood through narrow slots 97, 98.
- the sheet 95 of filter paper is positioned in the path of the discharge air flowing from the grinding wheel and removes most of the ground glass therefrom.
- the coolant When the coolant is not filtered, it contains bits of ground glass and diamond chips, and this coolant forms a grinding slurry that helps prevent the grinding wheel from glazing, and keeps the diamonds on the wheel open and standing out from their holding matrix and free to work efficiently until worn out. Accordingly, it is felt that this grinding slurry improves the performance and lengthens the life of the grinding wheel. All makes of grinding wheels may not be similarly affected.
- the method shown is one which can be used when it is desired to filter the coolant.
- the air passing through fan impeller 83 may be discharged into the room through fan outlet 99. However, if desired, the discharge air may be returned through return conduit 101 to hood slots 61 and 63. This recirculation of the discharge air improves the efficiency of the vacuum system and reduces the power needed to operate the fan impeller.
- a damper 103 may be provided in the return conduit 101 in order to regulate the amount of discharge air returned to hood 59, and a door 104 may be provided to exhaust some of the air.
- Spindle 55 is contained within a spindle housing 105 that is mounted on the bottom of motor housing 57.
- Spindle housing extends into hood 59, and a slot 107 is provided between hood 59 and housing 105.
- the vacuum means draws air through slot 107 to keep the coolant away from the spindle. This prevents the diamond and glass chips of the coolant from reaching and damaging the spindle bearings.
- the return air from conduit 101 is directed into the entrance slots 61 and 63 toward the grinding wheel to thereby convey the coolant in the direction away from the entrance slots and away from the sheet of glass. This blowing action therefore assists the suction means in preventing the coolant from spreading over the pane of glass.
- FIG. 4 The embodiment of the invention shown in FIG. 4 is a completely self-contained unit that is operated by a single motor and is completely enclosed. It incorporates an inexpensive filter system which may be used if desired, and also returns the discharge air to the inlet slots of the hood.
- the discharge air leaving the hood and entering the chamber formed by housing 69 is of reduced velocity so that the coolant drops out of the mixture of air and coolant and falls into coolant tank 67 before the air is sucked into the fan housing 89 by the fan impeller 83.
- Apparatus for wet grinding edges of a pane of glass comprising a grinding wheel, a hood enclosing the grinding wheel and having a slot for receiving the glass pane so that its edge may contact the grinding wheel, coolant feed means for feeding a coolant to the grinding wheel, and vacuum means for drawing the coolant and preventing it from flowing out over the pane of glass or misting into the surrounding air, including a coolant tank, and wherein said vacuum means includes a suction pipe extending from the hood to an exhaust opening for the air, a fan positioned in the suction pipe for drawing the coolant and air into the suction pipe, and a drain connected to the suction pipe and extending downwardly therefrom so that the used coolant may separate by gravity from the air and return to the tank, wherein said fan develops about 9 inches of coolant suction so that the level of coolant in the drain pipe is about 9 inches higher than the level of coolant in the coolant tank.
- Apparatus for wet grinding edges of a pane of glass comprising a grinding wheel, a hood enclosing the grinding wheel and having a slot for receiving the glass pane so that its edge may contact the grinding wheel, coolant feed means for feeding a coolant to the grinding wheel, and vacuum means for drawing the coolant and preventing it from flowing out over the pane of glass or misting into the surrounding air, including a coolant tank, said coolant feed means including a pump positioned in the coolant tank, and a coolant feed pipe extending from the pump and terminating in a coolant outlet positioned in close proximity to the grinding wheel, said grinding wheel being positioned so that it rotates in a horizontal plane, said slot being parallel to the plane of the grinding wheel and having a front slot in the front of the hood and side slots which are formed in the sides of the hood, said vacuum means including a suction pipe extending from the hood to an exhaust opening for the air, a fan positioned in the suction pipe for drawing the coolant and air into the su
- Apparatus for wet grinding edges of a pane of glass including a grinding wheel, and Coolant feed means for feeding a coolant to the grinding wheel
- the improvement comprises a hood enclosing the grinding wheel and having a slot for receiving the glass pane so that its edge may contact the grinding wheel, and a vacuum means for drawing the coolant and preventing it from flowing out over the pane of glass or misting into the surrounding air, including a motor, a spindle connected between the motor and grinding wheel for rotating the wheel, said vacuum means including a fan connected to the motor and driven thereby, a coolant tank below the wheel, a housing connecting the hood to the fan and to the coolant tank, a pump, an inlet pipe connecting the coolant tank to the pump, a coolant feed tube extending from the pump to the grinding wheel whereby to direct coolant onto the wheel, and means connecting the motor to the pump for driving the pump.
- An apparatus for wet grinding edges of a pane of glass including a grinding wheel, and coolant feed means for feeding a coolant to the grinding wheel, wherein the improvement comprises a hood enclosing the grinding wheel and having a slot for receiving the glass pane so that its edge may contact the grinding wheel, and a vacuum means for drawing the coolant and preventing it from fiovw'ng out over the pane of glass or misting into the surrounding air, including a motor, a spindle connected between the motor and grinding wheel for rotating the wheel, said vacuum means including a fan connected to the motor and driven thereby, a coolant tank below the wheel, a housing connecting the hood to the fan and to the coolant tank, a pump, an inlet pipe connecting the coolant tank to the pump, a coolant feed tube extending from the pump to the grinding wheel whereby to direct coolant onto the wheel, and means connecting the motor to the pump for driving the pump, wherein the fan is mounted on top ofthe motor with a housing therebetween so that the fan draws air upwardly
- Apparatus for wet grinding edges of a pane of glass including a grinding wheel, and coolant feed means for feeding a coolant to the grinding wheel
- the improvement comprises a hood enclosing the grinding wheel and having a slot for receiving the glass pane so that its edge may contact the grinding wheel, and a vacuum means for drawing the coolant and preventing it from flowing out over the pane of glass or misting into the surrounding air, including a filter positioned in the path of the coolant being drawn from the glass pane by said vacuum means, said filter including a roll of filter material mounted above the hood, and a sheet of filter material extending from the roll across the hood.
- Apparatus for wet grinding edges of a pane of glass including a grinding wheel, and coolant feed means for feeding a coolant to the grinding wheel, wherein the improvement comprises a hood enclosing the grinding wheel and having a restricted opening for receiving the glass pane so that its edge may contact the grinding wheel, a vacuum means for drawing the coolant away from the pane and restricted opening and preventing it from flowing out over the pane of glass or misting into the surrounding air, and a suction pipe connected to the hood, said suction pipe having a larger volume than the restricted opening so as to slow the velocity of the air passing therethrough to permit the gravity separation of the coolant carried by the air.
- Apparatus for wet grinding edges of a pane of glass including a grinding wheel, and a coolant feed means for feeding a coolant to the grinding wheel
- the improvement comprises a hood enclosing the grinding wheel and having a restricted opening for receiving the glass pane so that its edge may contact the grinding wheel, and a vacuum means for drawing the coolant away from the pane and restricted opening and preventing it from flowing out over the pane of glass or misting into the surrounding air, said vacuum means drawing air from the hood and discharging it therefrom, and means for returning the discharged air to said restricted opening in the hood, said grinding wheel being rotated by a motordriven spindle in a spindle housing connected to the 8 hood, said hood being provided with a slot between hood and spindle housing, the vacuum means drawing air through said slot to keep the coolant away from the spindle.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US62104867A | 1967-03-06 | 1967-03-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3553910A true US3553910A (en) | 1971-01-12 |
Family
ID=24488499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US621048A Expired - Lifetime US3553910A (en) | 1967-03-06 | 1967-03-06 | Grinding apparatus |
Country Status (1)
Country | Link |
---|---|
US (1) | US3553910A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0395255A2 (en) * | 1989-04-25 | 1990-10-31 | Silicon Technology Corporation | A seal assembly for a wafer grinding machine |
WO1994025222A1 (en) * | 1993-04-28 | 1994-11-10 | Tamglass Engineering Oy | Cooling water circulation system for a grindstone |
US5497590A (en) * | 1995-03-06 | 1996-03-12 | Counihan; James | Resilient flooring |
US6367217B1 (en) | 1999-11-04 | 2002-04-09 | Robbins, Inc. | Sleeper assembly for resilient hardwood floor system |
-
1967
- 1967-03-06 US US621048A patent/US3553910A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0395255A2 (en) * | 1989-04-25 | 1990-10-31 | Silicon Technology Corporation | A seal assembly for a wafer grinding machine |
EP0395255A3 (en) * | 1989-04-25 | 1991-02-20 | Silicon Technology Corporation | A seal assembly for a wafer grinding machine |
US5331772A (en) * | 1989-04-25 | 1994-07-26 | Silicon Technology Corp. | Seal assembly for a wafer grinding machine |
WO1994025222A1 (en) * | 1993-04-28 | 1994-11-10 | Tamglass Engineering Oy | Cooling water circulation system for a grindstone |
US5497590A (en) * | 1995-03-06 | 1996-03-12 | Counihan; James | Resilient flooring |
US6367217B1 (en) | 1999-11-04 | 2002-04-09 | Robbins, Inc. | Sleeper assembly for resilient hardwood floor system |
US6637169B2 (en) | 1999-11-04 | 2003-10-28 | Robbins, Inc. | Sleeper assembly for resilient hardwood floor system |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ASSOCIATES COMMERCIAL CORPORATION, THE PHILADELPHI Free format text: SECURITY INTEREST;ASSIGNOR:HORDIS BROTHERS INC.,;REEL/FRAME:003924/0789 Effective date: 19811002 |
|
AS | Assignment |
Owner name: HORDIS BROTHERS, INC., 1100 ONE FRANKLIN PLAZA, PH Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:COMBUSTION ENGINEERING, INC.;REEL/FRAME:003939/0567 Effective date: 19811002 |
|
AS | Assignment |
Owner name: RIS IRRIGATION SYSTEMS PTY. LIMITED, CNR. PHILIP H Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:IPLEX PTY. LIMITED;REEL/FRAME:003939/0617 Effective date: 19811026 |
|
AS | Assignment |
Owner name: HORDIS BROTHERS, INC., 825 HYLTON ROAD, PENNSAUKE, Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANK HAPOALIM;REEL/FRAME:004444/0231 Effective date: 19850716 Owner name: HORDIS BROTHERS, INC., 825 HYLTON ROAD, PENNSAUKEN Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:PHILADELPHIA NATIONAL BANK;REEL/FRAME:004435/0614 Effective date: 19850717 Owner name: NEW JERSEY NATIONAL BANK, A NATIONAL BANKING ASSOC Free format text: SECURITY INTEREST;ASSIGNOR:HORDIS BROTHER, INC., A CORP OF PA.;REEL/FRAME:004432/0633 Effective date: 19850717 Owner name: HORDIS BROTHERS, INC., 825 HYLTON ROAD, PENNSAUKEN Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:ASSOCIATED COMMERCIAL CORPORATION;REEL/FRAME:004435/0610 Effective date: 19821210 |