US3510987A - Abrading machine - Google Patents

Abrading machine Download PDF

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Publication number
US3510987A
US3510987A US714952A US3510987DA US3510987A US 3510987 A US3510987 A US 3510987A US 714952 A US714952 A US 714952A US 3510987D A US3510987D A US 3510987DA US 3510987 A US3510987 A US 3510987A
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United States
Prior art keywords
work piece
band
pivoting
abrading
pressure
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Expired - Lifetime
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US714952A
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English (en)
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Paul Ernst
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Individual
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Individual
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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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/10—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving a rigid member, e.g. pressure bar, table, pressing or supporting the belt over substantially its whole span
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor

Definitions

  • the present invention relates to an apparatus for abrading the surface of a work piece, and may be useful for abrading or polishing plates or like parts having flat surfaces of such materials as steel or other metal, rigid synthetic resins, plywood, and the like.
  • the apparatus of the invention comprises a conveyor for moving the work piece in the direction of its length to an abrading station, an endless band of abrasive material mounted for movement in contact with, and in the direction of the width of, the work piece surface at the abrading station, and a pressure means arranged to press the endless band of abrasive material against the surface over its entire width at the abrading station.
  • a carrier frame for the pressure means extending in the direction of the length of the work piece and having a width exceeding the width of the endless band whereby the two lateral ends of the carrier frame project beyond the width of the endless band.
  • the carrier frame includes a pivoting element mounted on each lateral end of the carrier frame for pivoting about an axis extending in the direction of the movement of the endless band.
  • each lever arm means is afiixed to each pivoting element for pivoting in unison therewith, a horizontal lever arm means is affixed to each pivoting element for pivoting in unison therewith, and an oblique lever arm means is aflixed to each pivoting element for pivoting in unison therewith, the oblique lever arm means enclosing an acute angle with the conveyor in the direction of its movement.
  • each lever arm means consists of a series of like levers adjacently mounted on the pivoting elements along the axes thereof. Sensing rollers are at the outer ends of the oblique lever arms.
  • a series of pressure rollers transmit the pressure from the pressure means to the endless abrading band, thus providing rolling frictional engagement therebetween.
  • uniform distribution of the pressure also over the gaps between the series of pressure rollers is assured by mounting a steel band between the pressure rollers and the abrading band. In this manner, substantially the entire energy is used for a'brading or polishing.
  • FIG. 1 is a schematic side view of the one embodiment of an abrading machine according to this invention.
  • FIG. 2 is a similar view of another embodiment thereof.
  • FIG. 3 is a section along line III-III of FIG. 1, with certain elements removed for claritys sake;
  • FIG. 4 is an end view of the machine of FIG. 1, seen in the direction of arrow 6, the view of FIGS. 3 and 4 being schematic.
  • the machine is shown to include an endless conveyor 27 moving the work piece 7 in the direction of arrow 6, i.e. in the direction of the length of the work piece to the illustrated abrading station.
  • Rotata-ble rolls 24, 25 support the conveyor band and the work piece at the abrading station underneath the endless band 21 of abrading material.
  • the endless abrading band is mounted for movement in contact with, and in the direction of the width of, the surface of Work piece 7 at the abrading station.
  • the abrading band may be a suitable abrasive paper or emery cloth.
  • An endless steel pressure band 20 is trained over pulleys 28, 28, one of the pulleys being rotated by a power source (not shown) to move the pressure band continuously.
  • a felt cloth or like friction-producing means is interleaved between the steel band 20 and the abrading band 21 whereby the abrading band is continuously moved along with the steel band, the abrading band being trained over guide roller 29.
  • the endless abrasive band is pressed against the surface of the work piece at the abrading station in the following manner:
  • a carrier frame 1 extends in the direction of the length of the work piece and has a width exceeding the Width of the endless band 21 whereby the two lateral ends of the carrier frame project beyond the width of the endless abrading band.
  • Two pivoting elements 2, 2' are mounted on each lateral end of the carrier frame by pivot bolts 3, 3' for pivoting about an axis extending in the direction of the movement of the endless band.
  • the illustrated pivoting elements are cross beams extending transversely of the direction of movement of the work piece.
  • Upright lever arm means 4, 4', horizontal lever arm means 5, 5 and oblique lever arm means 8, 8" are aflixed to each pivoting element for pivoting in unison therewith, the illustrated lever arm means consisting of a series of like levers adjacently mounted on the pivoting elementstive ones of the outer ends of upright levers 4, 4', the connecting rods extending in the direction of the length of the work piece.
  • a like series of U-shaped carriers 11 constitutes a carrier means having a horizontal bar means consisting in the illustrated embodiment of a series of horizontal bars 12 extending in the direction of the length of the work piece.
  • the U-shaped carrier means links the outer ends of the horizontal lever means of each of the pivoting elements.
  • Sensing roller means constituted in the illustrated embodiment by a series of rollers 9, 9' are mounted at the outer ends of the oblique lever arms 8, 8.
  • the connecting rods 1t? interconnect the upright lever arms of the two pivoting elements into a unit so that they will swing in unison when only the arms of one pivoting element are pivoted, thus assuring full contact with the work piece until both series of rollers '9, 9" have left the work piece.
  • a stop 14 is mounted on carrier frame 1 and the tension spring 13, whose ends are connected to the stop bar and to horizontal lever arm means 4, pulls the entire pivoting lever system towards stop 14 into the position shown in broken lines in FIG. 1.
  • a pressure means arranged to press the endless band 21 of abrading material against the surface of work piece 7 over its entire width at the abrading station is mounted on carrier frame 1.
  • This pressure means includes the following structure:
  • a pair of pull elements consisting in the illustrated embodiment of a series of pull rods 15, 15' are vertically movably mounted in slots defined in the horizontal bars 12 of the U-shaped carrier means, the pull elements being spaced apart in the direction of the length of the work piece and extending over the width thereof.
  • Pressure roller means consisting in the illustrated embodiment of a series of rollers 16, 16 are mounted at the lower ends of the pull rods and are pressed downwardly against the endless band 21 of abrasive material by elastic element 18 which is mounted between the. carrier frame 1 and a series of bridging members 17 which interconnect the lower ends of the pull rods 15, 15.
  • the downward movement of the pressure rollers 16 ,16' is limited by stops 19, 19' connected to the upper ends of the pull rods and cooperating with horizontal bars 12 to delimit the downward movement of the rods.
  • the pressure rollers are pressed against steel band 21 interposed between the rollers and the abrasive band.
  • the sensing rollers 9, 9' are below the level of the abrasive band.
  • spring means 13 will bias the pivoting lever arm system against stop bar 14, thus forcing horizontal bars 12 of the U-shaped carrier means into the. indicated upper position against stops 19, 19', thus causing disengagement between the abrasive band and the work piece surface.
  • the pressure from rolls 22, 24, 25 is released to protect the trailing edge of the work piece against abrasion.
  • FIG. 2 differs from the above-described embodiment only in certain aspects, and to avoid redundancy, like parts operating in a like manner as designated by the same reference numerals.
  • the pivoting lever arm system is biased against a stop bar on carrier frame 1a by spring 13a, and the U-shaped bar means 11a has a horizontal bar means 12a.
  • compression springs 26, 26, are mounted about the. upper ends of the pull rods 15, 15, being held under compression by nuts 26a, 26a.
  • An apparatus for abrading the surface of a Work piece having a width and a length comprising (a) a conveyor for moving the work piece in the direction of its length of an abrading station;
  • a carrier frame for the pressure means extending in the direction of the length of the work piece and having a width exceeding the width of the endless band whereby the two lateral ends of the carrier frame project beyond the width of the endless band
  • the carrier frame including (1) a pivoting element mounted on each lateral end of the carrier frame for pivoting about an axis extending in the direction of the movement of the endless band
  • oblique lever arm means aflixed to each pivoting element for pivoting in unison therewith, the oblique lever arm means enclosing an acute angle with conveyor in the direction of its movement.
  • the apparatus of claim 1 further comprises a stop means mounted on the carrier frame, and tension spring means biasing the upright lever arm means against the stop means in the direction of the movement of the work piece.
  • each of said lever arm means consists of a series of like levers adjacently mounted on the pivoting elements along the axes thereof.
  • the apparatus of claim 6, further comprising a series of connecting rods linking respective ones of the outer ends of the upright levers of each of the pivoting elements, said connecting rods extending in the direction of the length of the work piece; a like series of U-shaped carriers each having a horizontal bar extending in the direction of the length of the work piece, the U-shaped carriers linking respective ones of the outer ends of the horizontal levers of each of the pivoting elements, each horizontal bar defining a pair of slots; the pressure means including a series of pairs of pull rods vertically movably extending through the slots, the pull rods of each pair being spaced apart in the direction of the length of the work piece and the series of pull rod pairs extending over the width thereof, pressure rollers at the lower ends of the pull rods and pressing against the endless band of abrasive material, and bridging members interconnecting the lower ends of each pair of pull rods; and sensing rollers at the outer ends of the oblique lever arms.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US714952A 1967-03-22 1968-03-21 Abrading machine Expired - Lifetime US3510987A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEF0033655 1967-03-22
DEE0033655 1967-03-22

Publications (1)

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US3510987A true US3510987A (en) 1970-05-12

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Application Number Title Priority Date Filing Date
US714952A Expired - Lifetime US3510987A (en) 1967-03-22 1968-03-21 Abrading machine

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Country Link
US (1) US3510987A (enrdf_load_stackoverflow)
FR (1) FR1569748A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640056A (en) * 1983-06-24 1987-02-03 Timesavers, Inc. Vertically self-centering feed assembly
US5179805A (en) * 1988-09-19 1993-01-19 Murunaka & Co., Ltd. Sanding method and apparatus
US7235002B1 (en) * 2006-01-23 2007-06-26 Guardian Industries Corp. Method and system for making glass sheets including grinding lateral edge(s) thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320638A (en) * 1941-02-14 1943-06-01 Fred H Morris Sanding belt machine
US3400493A (en) * 1966-02-16 1968-09-10 Carborundum Co Belt sanding and polishing machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320638A (en) * 1941-02-14 1943-06-01 Fred H Morris Sanding belt machine
US3400493A (en) * 1966-02-16 1968-09-10 Carborundum Co Belt sanding and polishing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640056A (en) * 1983-06-24 1987-02-03 Timesavers, Inc. Vertically self-centering feed assembly
US5179805A (en) * 1988-09-19 1993-01-19 Murunaka & Co., Ltd. Sanding method and apparatus
US7235002B1 (en) * 2006-01-23 2007-06-26 Guardian Industries Corp. Method and system for making glass sheets including grinding lateral edge(s) thereof

Also Published As

Publication number Publication date
FR1569748A (enrdf_load_stackoverflow) 1969-06-06

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