WO2008062280A2 - Ponceuse/meuleuse orbitale excentrée - Google Patents

Ponceuse/meuleuse orbitale excentrée Download PDF

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Publication number
WO2008062280A2
WO2008062280A2 PCT/IB2007/003566 IB2007003566W WO2008062280A2 WO 2008062280 A2 WO2008062280 A2 WO 2008062280A2 IB 2007003566 W IB2007003566 W IB 2007003566W WO 2008062280 A2 WO2008062280 A2 WO 2008062280A2
Authority
WO
WIPO (PCT)
Prior art keywords
support
abrasive
sanding
rings
circular
Prior art date
Application number
PCT/IB2007/003566
Other languages
English (en)
Other versions
WO2008062280A3 (fr
Inventor
Miksa Marton
Original Assignee
Miksa Marton
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Miksa Marton filed Critical Miksa Marton
Publication of WO2008062280A2 publication Critical patent/WO2008062280A2/fr
Publication of WO2008062280A3 publication Critical patent/WO2008062280A3/fr

Links

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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools
    • 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
    • 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
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces

Definitions

  • This invention relates to sanding and grinding apparatus, and more particularly to an orbital off-centric sanding and grinding apparatus.
  • Sanding with a coarse abrasive and/or at high speeds increases the likelihood that the sanding operation will mark the working surface. Further, if the sander/grinder is tipped at an angle to the working surface, the abrasive will often gouge the working surface, leaving the working surface uneven. For these reasons, sanding and grinding can be a difficult, skill-necessitating task for an operator
  • the coarse sanding of the varnish generates enough heat to soften the varnish such that it becomes sticky and clogs the abrasive.
  • the abrasive cuts streak marks into the floor and unevenly sands the floor.
  • the abrasive must then be prematurely disposed of, and the operator must re-sand the floor to eliminate the streak marks and to even the surface of the floor.
  • the abrasive action of the drum sander causes tiny wood splinters and hairs to stick up from the surface of the hardwood floor.
  • the operator may have to coat and sand the floor multiple times to eliminate the splinters and hairs from the floor surface.
  • the operator may have to use an alternative sanding system, such as a random orbital sander or fine paper polishing to properly finish the floor prior to applying new varnish on the floor.
  • the present invention provides a circular abrasive disc support for orbital, off-centric sanding and grinding operations.
  • the present invention allows for sanding/grinding with a coarse grit abrasive, such as a 36 grit abrasive, while leaving a smooth finish that would normally be obtained by using a fine grit abrasive such as a 120 grit abrasive.
  • the present invention does not create swirl marks or similar blemishes in the working surface by advantageously grinding and fine sanding at the same time.
  • the ability of the present invention to grind and sand at the same time both reduces the amount of labor expended preparing the working surface and improves the quality of the finish on the working surface.
  • a circular abrasive disc support in accordance with the invention has a center and includes a mount for mounting the support to a rotating drive such as a drive shaft of a motor.
  • the mount is offset from the center to provide an offset connection to the rotating drive.
  • An abrasive on the support is elliptically rotated as the rotating drive is operated.
  • the mount may be offset from the center a distance in a range of 5 mm to 15 mm.
  • the mount may be offset 10 mm from the center.
  • the support may include a plurality of concentric, raised rings having a mounting edge and a working edge.
  • the mounting edge is connected to the support, and the working edge includes an abrasive.
  • the abrasive may be bonded to the working edge, impregnated on the working edge, or similar.
  • the abrasive may be industrial diamond, tungsten carbide, or similar. Adjacent rings may be spaced generally 2.5 mm apart .
  • the rings may be centered about a center of the support .
  • the support may include circular grooves each having a depth shorter in length than a height of the rings, and the rings may be mounted in the grooves .
  • the rings may be made of steel or similar.
  • FIG. 1 is an environmental view of a sanding apparatus including a circular abrasive disc support in accordance with the invention
  • FIG. 2 is a plan view of the circular abrasive disc support including an offset mount
  • FIG. 3 is a partial sectional view of the circular abrasive disc support mounted on a rotating drive
  • FIG. 4 is an exploded view of the circular abrasive disc support .
  • numeral 10 generally indicates a circular abrasive disc support in accordance with the invention.
  • the circular abrasive disc support 10 allows for the off- centric mounting of an abrasive paper, disc, pad, or similar to a rotating drive such as a shaft that is driven by a motor or similar.
  • the offset connection of the abrasive relative to the rotating drive shaft causes the abrasive to rotate in an elliptical path when the drive shaft is actuated.
  • the circular abrasive disc support 10 includes a center 12 and a mount 14 for mounting the support to a rotating drive such as a rotating drive shaft 16.
  • the mount 14 is offset from the center 12 to provide an offset, operative connection to the rotating drive shaft 16.
  • An abrasive 18 on the support 10 is elliptically rotated as the drive shaft 16 is operated.
  • the disc support 10 may be a backing plate for mounting of an abrasive 18 such as an abrasive paper or pad thereon, or may be a disc-like body of an abrasive plate including an abrasive 18 thereon.
  • the abrasive 18 may be centered about a surface of the disc support 10.
  • the abrasive disc support 10 may be mounted on the rotating drive shaft 16 of a sanding motor assembly.
  • the sanding motor assembly generally may include a motor that drives the rotating drive shaft 16.
  • the drive shaft 16 rotates the abrasive disc support 10 about an axis 20 that is offset from the center 12 of the abrasive disc support.
  • the abrasive 18 mounted on the support 10 thereby travels in an elliptical path while also rotating at the same speed that it travels in its elliptical path. This is due to the fact that the drive shaft 16 directly drives both the rotational and elliptical movement of the abrasive 18.
  • the abrasive 18 simultaneously grinds in its circular rotational path and sands back and forth in its elliptical path. Further, by allowing for grinding and sanding at the same time, the present invention can finish a working surface faster than other devices while also not leaving any swirl marks on the working surface .
  • the center of mass of all of the rotating members should be centered about the rotational axis 20 of the support 10 and mounted abrasive 18. Otherwise, the offset rotation of the support 10 and abrasive 18 may cause unwanted vibration of the sanding apparatus. Therefore, the present invention may include a means of counterbalancing or a counterbalance structure to eliminate vibrations caused by the offset rotation of the support 10 and abrasive 18.
  • the support 10 may be approximately 16 inches in diameter.
  • the rotating drive shaft 16 may be connected to the support 10 centered about a point that is about 10 mm (or approximately 1/2 inch) from the center 12 of the support 10.
  • the drive shaft 16 rotates the support 10, it travels in an elliptical path that is 20 mm in length, whereby the abrasive 18 sands back and forth in 20 mm strokes while also grinding in a circular motion.
  • the support 10 thereby allows the abrasive 18 to cross-sand over its own circular grinding.
  • the drive shaft 16 may be offset other lengths, such as any length between 5 and 10 mm or even a length less then 5 mm or greater than 10 mm.
  • the support 10 may be offset 5 mm, 10 mm, or 15 mm from the drive shaft 16, or any other length around the approximate range of 5 to 15 mm. This allows supports of different "offsets" to be used with the same drive shaft 16. An operator could replace a 10 mm offset support with a 5 mm offset holding plate or a 15 mm offset support depending upon the application.
  • the present invention is not limited to any particular offset or any particular size.
  • the size of the support 10 and the length of offset of the drive shaft 16 relative to the center 12 of the support 10 and abrasive 18 may be chosen based upon such factors as the material of the working surface.
  • the support 10 may hold a variety of abrasives 18 such as diamond coated discs, stone abrasives, or similar, allowing for applications ranging from coarse grinding to fine polishing.
  • An important aspect of the present invention is that the support 10 is rotated at a point that is offset from its center 12. Further, no matter what the length of the offset is, each support 10 should include a means of counterbalancing or a counterbalance structure to adjust the center of mass of support to the axis of rotation of the support.
  • a sanding apparatus utilizing the support 10 may include a speed reducer to reduce the speed of the support 10.
  • the speed reducer may reduce the speed of the support 10 to 1000 rpm, although any other speed is also within the scope of the present invention.
  • the speed at which the operator sets the speed reducer also may depend upon such factors as the material of the working surface.
  • the support 10 may be used with a sanding apparatus to grind and sand a variety of working surfaces including but not limited to metal surfaces such as steel surfaces, marble, concrete, stone, and hardwood.
  • metal surfaces such as steel surfaces, marble, concrete, stone, and hardwood.
  • the back and forth elliptical motion of the support 10 and mounted abrasive 18 quickly sands away any scratch marks created by the circular grinding motion of the support and abrasive.
  • the sheet metal surface is grinded, finished, and ready for painting.
  • the support 10 may also be used to finish a sheet metal surface quickly enough such that there is not a significant amount of heat generated. Therefore, the metal surface is not warped when worked upon by the support 10 and mounted abrasive 18.
  • the support 10 integrally may be an abrasive disc.
  • the support 10 integrally may include the abrasive 18.
  • the support 10 may include a plurality of concentric, raised rings 22 having a mounting edge 24 and a working edge 26.
  • the mounting edge 24 is connected to a surface 28 of the support 10, and the working edge 26 includes an abrasive material 30.
  • the support 10 may be approximately 16 inches in diameter and approximately 20 mm thick.
  • the rings 22 may have a height (distance from the mounting edge 24 to the working edge 26) of approximately 15 mm, and the rings may have a thickness of 1.5 mm, although other dimensions are within the scope of the invention.
  • the rings 22 may ⁇ be made of steel or similar.
  • the abrasive material 30 may be bonded to the working edge 26, impregnated on the working edge, or similar.
  • the abrasive material 30 may be industrial diamond, tungsten carbide, or similar.
  • Adjacent rings 22 may be spaced generally 2.5 mm apart.
  • the rings 22 may be centered about the center 12 of the support 10.
  • the support 10 also may include circular grooves 32 each having a depth shorter in length than the height of the rings 22.
  • the rings 22 may be mounted in the grooves 32.
  • the grooves 32 may be approximately 11 mm deep such that each ring extends outwardly about 4 mm from the surface 28 of the support 10.
  • the rings 22 may be mounted on the support 10 by a plurality of elongated pins 34.
  • Each elongated pin 34 extends from an outer edge of the support 10 towards the center of the support like an internal spoke, passing through each ring 22 to hold the rings on the support .
  • An inner end of each elongated pin 34 may engage a stop in the support 10 that is a sidewall of a cylindrical bore in the support.
  • a through hole may be drilled in each elongated pin 34 adjacent the inner end of the pin for inserting a locking device such as a small cotter pin to keep the elongated pins from coming loose.
  • the cotter pins may be inserted into the elongated pins 34 through bores in the support 10. This method of mounting the rings 22 allows for any single one of the rings to be replaced if it becomes damaged or worn. To replace a ring 22, the elongated pins 34 are removed, the damaged ring is removed, a new ring is inserted, and then finally the elongated pins are reinserted and secured.
  • Each ring 22 also may include one or more curved grooves along the working edge 26 of the ring. In one embodiment, each ring 22 may include between 8 and 16 grooves. The rings 22 may not be coated along the grooves. Also, when the rings 22 are mounted to the support 10, the grooves may be aligned from the innermost circular ring to the outermost circular ring such that the grooves define a straight path from the inner portion of the support to the outer edge of the support . When the rings 22 are in use on a working surface, the aligned grooves allow sanding waste to travel from the inner portion of the support 10, i and from between the rings, to the outside edge of the support . A vacuum source may be disposed along the outside edge of the support 10 to suck away sanding waste that has traveled to the outside edge of the support. The rings 22 thereby do not become clogged with sanding waste.
  • the rings 22 cross cut back and forth while also grinding in a circular path. Because of the back and forth cross-cutting of the rings, the abrasive action of the rings does not leave any swirl marks or blemishes in the working surface. Further, since all of the sanding waste is sucked up with a vacuum, the support 10 may be used to sand such working surfaces as a marble or cement floor without the use of water, which would mix with sanding waste to form mud.
  • the support 10 may be made in a range of sizes depending upon the desired application.
  • the support 10 may be designed as a handheld unit.
  • the support 10 may be designed to be used as a floor unit with a push-pull floor sanding apparatus 36.
  • the sanding apparatus 36 may include a floor contacting roller assembly 38 to facilitate movement and handling of the sanding apparatus, allowing an operator 40 to easily and controllably move the sanding apparatus along a floor.
  • the support 10 also may be used in combination with a variety of abrasives, including but not limited to fiber discs, diamond coated plates, as well as resin papers.

Landscapes

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

Abstract

L'invention porte sur un support de disque abrasif présentant un centre. Ledit support présente également une monture le fixant à un système d'entraînement tournant. La monture est décalée par rapport au centre pour permettre de placer la connexion du système d'entraînement tournant. L'abrasif disposé sur le support est animé d'une rotation elliptique lorsque l'entraînement tournant fonctionne.
PCT/IB2007/003566 2006-11-22 2007-11-20 Ponceuse/meuleuse orbitale excentrée WO2008062280A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86065206P 2006-11-22 2006-11-22
US60/860,652 2006-11-22

Publications (2)

Publication Number Publication Date
WO2008062280A2 true WO2008062280A2 (fr) 2008-05-29
WO2008062280A3 WO2008062280A3 (fr) 2011-03-03

Family

ID=39430111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/003566 WO2008062280A2 (fr) 2006-11-22 2007-11-20 Ponceuse/meuleuse orbitale excentrée

Country Status (1)

Country Link
WO (1) WO2008062280A2 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932164A (en) * 1988-07-13 1990-06-12 Sullivan Glenn F Counterbalance safety guard for a dual action sander
US6634437B1 (en) * 1998-04-23 2003-10-21 Gary Rudolph Apparatus and method for rotary motion conversion and waste product collection unit
US7022002B2 (en) * 2004-03-03 2006-04-04 Dynabrade, Inc. Modular counterweight apparatus for an orbital abrading machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932164A (en) * 1988-07-13 1990-06-12 Sullivan Glenn F Counterbalance safety guard for a dual action sander
US6634437B1 (en) * 1998-04-23 2003-10-21 Gary Rudolph Apparatus and method for rotary motion conversion and waste product collection unit
US7022002B2 (en) * 2004-03-03 2006-04-04 Dynabrade, Inc. Modular counterweight apparatus for an orbital abrading machine

Also Published As

Publication number Publication date
WO2008062280A3 (fr) 2011-03-03

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