US2589620A - Apparatus for cleaning, dressing, and grinding wheels - Google Patents

Apparatus for cleaning, dressing, and grinding wheels Download PDF

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Publication number
US2589620A
US2589620A US745807A US74580747A US2589620A US 2589620 A US2589620 A US 2589620A US 745807 A US745807 A US 745807A US 74580747 A US74580747 A US 74580747A US 2589620 A US2589620 A US 2589620A
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Prior art keywords
wheel
roller
crushing
dressing
grinding
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Expired - Lifetime
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US745807A
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Guy H Leffel
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Thompson Grinder Co
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Thompson Grinder Co
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Priority to US745807A priority Critical patent/US2589620A/en
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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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/07—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels by means of forming tools having a shape complementary to that to be produced, e.g. blocks, profile rolls

Definitions

  • This invention relates to improvements in connection with grinding machines, and particularly in connection with the dressing of the Wheel of a grinding machine.
  • One of the preferred forms of dressing a grinding wheel is by means of a crushing roller which comprises a relatively hard roll which is shaped to the configuration to which it is designed to grind the work pieces. This roll is pressed against the periphery of the grinding wheel and both of them rotated so there is no slipping at the point of contact thereof.
  • the roller By exerting a radial pressure between the wheel and roller, the roller is operable to crush the bonding of the wheel and thus to transfer thereto the desired configuration.
  • This method of dressing a wheel is of advantage because it results in a good finish on the ground work piece and permits the wheel to be shaped to complex configurations easily and at little expense.
  • a coolant is employed in order to improve the quality of the dressing operation.
  • This coolant together with the fine particles of the crushed bonding and the finer abrasive particles removed from the wheel form a sludge which adheres to the surface of the wheel and roller.
  • This sludge detracts from the quality of the crushing operation by making it less accurate and also detracts from the quality of the crushed wheel by filling the holes and cavities therein.
  • the particular object of the present invention is to provide a means for removing the sludge incident to the dressing operation so that a more accurate and sharper wheel will resultfrom a shorter dressing operation.
  • a further object of this invention is to remove the sludge referred to above which is a product of the crushing operation in order to preserve the accuracy of the crushing roller and to prevent the wheel being crushed from becoming loaded with the said sludge.
  • a further object is a provision of an attachment which may be employed on a grinding machine having crushing rollers for removing the sludge resulting from the crushing operation.
  • Figure 3 is a perspective view showing the device itself.
  • the grinding-wheel is indicated at H] and it is mounted for rotation on a shaft l2 which may be driven in any suitable manner.
  • the table of the grinding wheel is indicated at l4 and this is preferably a reciprocable member passing the work to and from beneath the grinding wheel.
  • the bed or frame member I 8 is adapted for adjustably receiving a bracket or fixture 20 which is slidable along the member l8 and key 24.
  • a crushing roller 22 Rotatably mounted on the fixture 20 is a crushing roller 22.
  • the roller 22 is aligned with the wheel In by movement relative to the bed l8 along the key 24 and is thereafter clamped in position by the hold down blocks 26.
  • a spray pipe at 28 which directs the coolant towards the point of contact of the wheel and roller.
  • the brush 30 is preferably a good bristle brush adapted for withstanding the abrasive action of the wheel surface and of sufficient stiffness to brush all of the sludge which adheres to the surface of the wheel therefrom.
  • a second brush of similar material is indicated at 32 and bears against the surface of roller 22 for removing the sludge which adheres to the surface thereof.
  • a sheet metal frame 34 which carries a mounting block 36 for the brush 30 and a mounting block 38 for the brush 32.
  • the screws 40 pass through the brushes and into the said supporting blocks and clamp the brushes in any particular position of adjustment.
  • the brushes are preferably slotted for receiving the screws so the brushes can be adjusted to different size wheels and rollers.
  • the frame 34 has the lower ends of its Legs turned in as at 42 and carried on each side of the bed I8 is a slotted member 44 for receiving the said turned in portions.
  • the member 34 is shown releasably mounted in a spring-like manner in the member 44.
  • the members 44 are preferably,
  • the grinding Wheel of the machine and the roller are brought together to their figure 1 position while the said wheel and roller are not rotating. Thereafter, the brushes 30 and 32 advance to bear against the periphery of the wheel and roller. Then, either the wheel, or the roller, or both are driven as indicated by the arrows on Figure 1 and at exactly equal surface speeds. During this period of rotation a radial thrust is exerted in order to bring about the crushing action between the wheel and roller.
  • the brushes keep the surfaces of the wheel and roller perfectly clean.
  • the wheel and roller are halted and thereafter the wheel may be employed for grinding work pieces.
  • this invention provides a ready means for insuring clean, sharp wheels when dressed by a crush dressing operation.
  • This invention also preserves the roller and allows -it to be used for a longer period before it must be reworked or replaced.
  • An apparatus for providing a clean contact surface area between a fluid cooled and lubricated rotatably mounted grinding wheel to be dressed and a crushing roll comprising a movable table member, a frame member mounted on said table member, a crushing roll rotatably mounted on said frame member and having a contact surface for intimate pressured engagement with a surface of said grinding wheel to shape the same, a frame element releasably mounted on said frame member and having an upper portion thereof spanning said frame member, first and second opposed legs of said frame element supporting said upper portion of said frame element, first brush means mounted on said first leg and adapted to engage said crushing roll during rotation thereof, and second brush means supported by and extending substantially vertically upwardly from said second leg and adapted for engagement with said grinding wheel during rotation thereof.
  • An'apparatus for providing a clean contact surface area between a fluid cooled and lubricated rotatably mounted grinding wheel to be dressed and a crushing roll comprising a movable table member, a frame member mounted on said table member, a bracket member mounted on said frame member, a crushing roll mounted and a second brush means adjustably supported by and extending substantially vertically upwardly from said second leg, said adjustment being provided for by an elongated slot connection to said second leg and adapted for engagement with said grinding wheel during rotation thereof.
  • An apparatus for providing a clean contact surface area between a fluid cooled and lubricated rotatably mounted grinding wheel to be dressed and a crushing roll comprising a movable table member, a frame member mounted on said table member, a bracket member mounted on said frame member, a crushing roll mounted on said bracket member and having a contact surface for intimate pressured engagement with a surface of said grinding wheel to shape the same, a frame element releasably mounted on said frame member and having a leg on each side of said frame member extending substantially vertically in the direction of said crushing roll and having a transverse portion of said element connecting the said legs together at about the height of said crushing roll, a first brush element supported on one of said legs at said transverse portion for engagement with said crush roll, and a second brush element adjustably mounted on the second of said legs and extending substantially vertically upwardly therefrom and adapted for engagement with said grinding wheel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Description

March 18, 1952 G. H. LEFFEL 2,589,620
APPARATUS FOR CLEANING, DRESSING, AND GRINDING WHEELS Filed May 5, 1947 2 SHEETS-SHEET 1 INVENTOR GUY H- LEFFEL ATTORNEYS March 18, 1952 LEFFEL 2,589,620
APPARATUS FOR CLEANING, DRESSING, AND GRINDING WHEELS Filed May a, 1947 2 sHETs--sHEET 2 I l l 1 INVENTOR GUY H- LEFFEL ATTORN EYS Patented Mar. 18, 1952 APPARATUS FOR CLEANING, DRESSING, AND GRINDING WHEELS Guy H. Leffel, Springfield, Ohio, assignor to The Thompson Grinder Company, Springfield, Ohio,
a corporation of Ohio Application May 3, 1947, Serial No. 745,807
3 Claims. 1
This invention relates to improvements in connection with grinding machines, and particularly in connection with the dressing of the Wheel of a grinding machine.
One of the preferred forms of dressing a grinding wheel is by means of a crushing roller which comprises a relatively hard roll which is shaped to the configuration to which it is designed to grind the work pieces. This roll is pressed against the periphery of the grinding wheel and both of them rotated so there is no slipping at the point of contact thereof.
By exerting a radial pressure between the wheel and roller, the roller is operable to crush the bonding of the wheel and thus to transfer thereto the desired configuration. This method of dressing a wheel is of advantage because it results in a good finish on the ground work piece and permits the wheel to be shaped to complex configurations easily and at little expense.
During the crushing operation on the wheel, a coolant is employed in order to improve the quality of the dressing operation. This coolant together with the fine particles of the crushed bonding and the finer abrasive particles removed from the wheel form a sludge which adheres to the surface of the wheel and roller. This sludge detracts from the quality of the crushing operation by making it less accurate and also detracts from the quality of the crushed wheel by filling the holes and cavities therein.
The particular object of the present invention is to provide a means for removing the sludge incident to the dressing operation so that a more accurate and sharper wheel will resultfrom a shorter dressing operation.
A further object of this invention is to remove the sludge referred to above which is a product of the crushing operation in order to preserve the accuracy of the crushing roller and to prevent the wheel being crushed from becoming loaded with the said sludge.
A further object is a provision of an attachment which may be employed on a grinding machine having crushing rollers for removing the sludge resulting from the crushing operation.
These and other objects and advantages will become more apparent upon reference to the accompanying drawings in which:
Figure 3 is a perspective view showing the device itself.
Referring to the drawings, the grinding-wheel is indicated at H] and it is mounted for rotation on a shaft l2 which may be driven in any suitable manner.
The table of the grinding wheel is indicated at l4 and this is preferably a reciprocable member passing the work to and from beneath the grinding wheel. Mounted on-the table I4 a by the bolts I6, is a bed or frame member I8.
The bed or frame member I 8 is adapted for adjustably receiving a bracket or fixture 20 which is slidable along the member l8 and key 24. Rotatably mounted on the fixture 20 is a crushing roller 22.
The roller 22 is aligned with the wheel In by movement relative to the bed l8 along the key 24 and is thereafter clamped in position by the hold down blocks 26.
For supplying coolant to the wheel and roller there may be any suitable spray or nozzle means, for the purpose of this disclosure it is shown as a spray pipe at 28 which directs the coolant towards the point of contact of the wheel and roller.
Positioned to bear on the periphery of the wheel I0 prior to its engagement with the crushing roller is a brush 30. The brush 30 is preferably a good bristle brush adapted for withstanding the abrasive action of the wheel surface and of sufficient stiffness to brush all of the sludge which adheres to the surface of the wheel therefrom.
A second brush of similar material is indicated at 32 and bears against the surface of roller 22 for removing the sludge which adheres to the surface thereof.
For supporting the brushes 30 and 32, there is provided a sheet metal frame 34 which carries a mounting block 36 for the brush 30 and a mounting block 38 for the brush 32. The screws 40 pass through the brushes and into the said supporting blocks and clamp the brushes in any particular position of adjustment. To this end, the brushes are preferably slotted for receiving the screws so the brushes can be adjusted to different size wheels and rollers.
The frame 34 has the lower ends of its Legs turned in as at 42 and carried on each side of the bed I8 is a slotted member 44 for receiving the said turned in portions. The member 34 is shown releasably mounted in a spring-like manner in the member 44. The members 44 are preferably,
mounted on the bed l8 by screws in order to per-f mit the frame 34 to be applied to any crushing roller frame, and also to permit the said bed to be more easily machined.
In operation, the grinding Wheel of the machine and the roller are brought together to their figure 1 position while the said wheel and roller are not rotating. Thereafter, the brushes 30 and 32 advance to bear against the periphery of the wheel and roller. Then, either the wheel, or the roller, or both are driven as indicated by the arrows on Figure 1 and at exactly equal surface speeds. During this period of rotation a radial thrust is exerted in order to bring about the crushing action between the wheel and roller.
During the crushing action, the brushes keep the surfaces of the wheel and roller perfectly clean. After the crushing is completed, the wheel and roller are halted and thereafter the wheel may be employed for grinding work pieces.
After the brushes have once been set no furtherttdjustment thereof is necessary until the wheel, roller, or brushes wear down, or until a different size wheel or roll is placed in the machine.
It will be seen that this invention provides a ready means for insuring clean, sharp wheels when dressed by a crush dressing operation. This invention also preserves the roller and allows -it to be used for a longer period before it must be reworked or replaced.
It will be understood that this invention is susceptible to modification in order to adopt it to different usages and conditions and, accordingly, it is desired to comprehend such modifications within this invention as may fall within the scope of the appended claims.
I claim:
1. An apparatus for providing a clean contact surface area between a fluid cooled and lubricated rotatably mounted grinding wheel to be dressed and a crushing roll, comprising a movable table member, a frame member mounted on said table member, a crushing roll rotatably mounted on said frame member and having a contact surface for intimate pressured engagement with a surface of said grinding wheel to shape the same, a frame element releasably mounted on said frame member and having an upper portion thereof spanning said frame member, first and second opposed legs of said frame element supporting said upper portion of said frame element, first brush means mounted on said first leg and adapted to engage said crushing roll during rotation thereof, and second brush means supported by and extending substantially vertically upwardly from said second leg and adapted for engagement with said grinding wheel during rotation thereof.
2. An'apparatus for providing a clean contact surface area between a fluid cooled and lubricated rotatably mounted grinding wheel to be dressed and a crushing roll, comprising a movable table member, a frame member mounted on said table member, a bracket member mounted on said frame member, a crushing roll mounted and a second brush means adjustably supported by and extending substantially vertically upwardly from said second leg, said adjustment being provided for by an elongated slot connection to said second leg and adapted for engagement with said grinding wheel during rotation thereof.
3. An apparatus for providing a clean contact surface area between a fluid cooled and lubricated rotatably mounted grinding wheel to be dressed and a crushing roll, comprising a movable table member, a frame member mounted on said table member, a bracket member mounted on said frame member, a crushing roll mounted on said bracket member and having a contact surface for intimate pressured engagement with a surface of said grinding wheel to shape the same, a frame element releasably mounted on said frame member and having a leg on each side of said frame member extending substantially vertically in the direction of said crushing roll and having a transverse portion of said element connecting the said legs together at about the height of said crushing roll, a first brush element supported on one of said legs at said transverse portion for engagement with said crush roll, and a second brush element adjustably mounted on the second of said legs and extending substantially vertically upwardly therefrom and adapted for engagement with said grinding wheel.
GUY H. LEFFEL.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,011,573 Butler Dec. 12, 1911 1,280,639 Beier et al Oct. 8, 1918 1,286,518 Brassill Dec. 3, 1918 1,984,729 Dahl Dec. 18, 1934 2,033,046 Montgomery Mar. 3, 1936 2,124,008 Roth July 19, 1938 2,282,770 Sarver May 12, 1942 2,317,533 Joslin Apr. 27, 1943 FOREIGN PATENTS Number Country Date 202,134 Great Britain Aug. 16, 1923
US745807A 1947-05-03 1947-05-03 Apparatus for cleaning, dressing, and grinding wheels Expired - Lifetime US2589620A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641118A (en) * 1952-07-18 1953-06-09 Edelson Leon Lighter construction
US2792675A (en) * 1955-10-31 1957-05-21 Elvin K Wilson Knife sharpener
US2839878A (en) * 1954-10-15 1958-06-24 Gen Motors Corp Machine control and tolerance gauging device
US3444654A (en) * 1966-01-24 1969-05-20 Robert E Tipps Rotary abrasive wheel wetting attachment and abrasive pickup
US3744080A (en) * 1971-08-04 1973-07-10 J Smith Caster brush assembly
US4418503A (en) * 1979-12-27 1983-12-06 Dantinne Pierre G Apparatus for continuously polishing the pressure roller of a coiling machine
EP0153852A1 (en) * 1984-02-22 1985-09-04 Unicorn Industries Plc Profiling grinding wheels
US4830553A (en) * 1988-07-06 1989-05-16 Industrial Tools, Inc. Coolant manifold assembly
US5070570A (en) * 1989-06-26 1991-12-10 Sabo Gary L Reconditioning tool for rotary faced buffing pad
WO1996015875A1 (en) * 1994-11-17 1996-05-30 Hewlett-Packard Company Media roller high friction surfacing system
US20120322349A1 (en) * 2010-12-06 2012-12-20 Joesi Peter Grinding device for machine based grinding of rotor blades for wind energy systems

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1011573A (en) * 1909-02-26 1911-12-12 James William Butler Abrading-machine.
US1280639A (en) * 1913-05-31 1918-10-08 United Shoe Machinery Corp Buffing-machine.
US1286518A (en) * 1918-03-08 1918-12-03 Frank Aloisious Brassill Guard and water-feed combination.
GB202134A (en) * 1922-07-08 1923-08-16 White And Poppe Ltd Improvements in apparatus for dressing emery or other abrasive wheels
US1984729A (en) * 1933-10-19 1934-12-18 American Sheet & Tin Plate Apparatus for cleaning metal working rolls
US2032046A (en) * 1936-02-25 Control mechanism fob burners
US2124008A (en) * 1936-10-05 1938-07-19 Firm Gebruder Buhler Roller brush for roller mills
US2282770A (en) * 1940-03-06 1942-05-12 Alan Dunn Barr Apparatus for removing foreign particles from air or similar gaseous mediums
US2317533A (en) * 1941-06-23 1943-04-27 Nat Steel Corp Roll brush

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032046A (en) * 1936-02-25 Control mechanism fob burners
US1011573A (en) * 1909-02-26 1911-12-12 James William Butler Abrading-machine.
US1280639A (en) * 1913-05-31 1918-10-08 United Shoe Machinery Corp Buffing-machine.
US1286518A (en) * 1918-03-08 1918-12-03 Frank Aloisious Brassill Guard and water-feed combination.
GB202134A (en) * 1922-07-08 1923-08-16 White And Poppe Ltd Improvements in apparatus for dressing emery or other abrasive wheels
US1984729A (en) * 1933-10-19 1934-12-18 American Sheet & Tin Plate Apparatus for cleaning metal working rolls
US2124008A (en) * 1936-10-05 1938-07-19 Firm Gebruder Buhler Roller brush for roller mills
US2282770A (en) * 1940-03-06 1942-05-12 Alan Dunn Barr Apparatus for removing foreign particles from air or similar gaseous mediums
US2317533A (en) * 1941-06-23 1943-04-27 Nat Steel Corp Roll brush

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641118A (en) * 1952-07-18 1953-06-09 Edelson Leon Lighter construction
US2839878A (en) * 1954-10-15 1958-06-24 Gen Motors Corp Machine control and tolerance gauging device
US2792675A (en) * 1955-10-31 1957-05-21 Elvin K Wilson Knife sharpener
US3444654A (en) * 1966-01-24 1969-05-20 Robert E Tipps Rotary abrasive wheel wetting attachment and abrasive pickup
US3744080A (en) * 1971-08-04 1973-07-10 J Smith Caster brush assembly
US4418503A (en) * 1979-12-27 1983-12-06 Dantinne Pierre G Apparatus for continuously polishing the pressure roller of a coiling machine
EP0153852A1 (en) * 1984-02-22 1985-09-04 Unicorn Industries Plc Profiling grinding wheels
US4830553A (en) * 1988-07-06 1989-05-16 Industrial Tools, Inc. Coolant manifold assembly
US5070570A (en) * 1989-06-26 1991-12-10 Sabo Gary L Reconditioning tool for rotary faced buffing pad
WO1996015875A1 (en) * 1994-11-17 1996-05-30 Hewlett-Packard Company Media roller high friction surfacing system
US5564970A (en) * 1994-11-17 1996-10-15 Hewlett-Packard Company Method and apparatus for creating or restoring high friction surface to media roller
GB2299775A (en) * 1994-11-17 1996-10-16 Hewlett Packard Co Media roller high friction surfacing system
GB2299775B (en) * 1994-11-17 1998-07-01 Hewlett Packard Co Apparatus and method for applying or increasing friction texture of a media roller surface
US20120322349A1 (en) * 2010-12-06 2012-12-20 Joesi Peter Grinding device for machine based grinding of rotor blades for wind energy systems

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