EP0249890A1 - Ponceuse, en particulier ponceuse pour profils - Google Patents

Ponceuse, en particulier ponceuse pour profils Download PDF

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Publication number
EP0249890A1
EP0249890A1 EP87108438A EP87108438A EP0249890A1 EP 0249890 A1 EP0249890 A1 EP 0249890A1 EP 87108438 A EP87108438 A EP 87108438A EP 87108438 A EP87108438 A EP 87108438A EP 0249890 A1 EP0249890 A1 EP 0249890A1
Authority
EP
European Patent Office
Prior art keywords
rollers
belt
grinding
roller
rotation
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.)
Withdrawn
Application number
EP87108438A
Other languages
German (de)
English (en)
Inventor
Michael Braun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0249890A1 publication Critical patent/EP0249890A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • B24B21/12—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving a contact wheel or roller pressing the belt against the work
    • B24B21/14—Contact wheels; Contact rollers; Belt supporting rolls
    • 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
    • B24B21/18—Accessories

Definitions

  • the invention relates to a grinding machine, in particular a profile grinding machine, with a grinding belt which preferably rotates endlessly around roller arrangements, which is preferably profiled by means of a profiled grinding shoe which rests on the back of the grinding belt in accordance with the shape of the workpiece to be ground, with at least one roller arrangement at least two essentially transverse to the direction of travel the abrasive belt has adjacent, rotatable rollers on which the abrasive belt rests over a large part of its width.
  • Profile grinding machines of this type often have cylindrical deflection and drive disks with parallel axes, against which the mostly textile abrasive belt rests with its rear side.
  • a problem arises here in profiling the sanding belt from its flat shape (in contact with the deflection or drive disks) with each revolution in accordance with the profile of the sanding shoe, so that it lies snugly against the profiled sanding shoe.
  • it has already been proposed to suck in the grinding belt on the grinding shoe by means of negative pressure or to use deflection and drive disks profiled according to the profile of the grinding shoe.
  • Such profiled washers contact washers
  • profiled deflection and drive disks are used, it is disadvantageous, among other things, that these disks are used for grinding shoes with a different profile or for grinding work with a different profile pieces have to be replaced in order to always proliferate according to the profile of the grinding shoe or workpiece being used.
  • the grinding belt or its mostly textile base is weakened rapidly during operation due to the permanent changes in shape of the grinding belt .
  • the grinding belt flutters and, especially at high belt speeds, the grinding belt is thrown over and tangled, which makes further grinding with this bench impossible.
  • the object of the invention is to provide a grinding machine of the type mentioned at the outset, in which a tight fit of the grinding belt on the profiled grinding shoe or the contact disk and a perfect guidance without throwing and entangling the same is ensured over a large number of cycles. This should also be ensured if the base of the grinding belt has already been weakened by the permanent changes in shape, especially in the area of the grinding shoe or the contact disk. According to the invention, this is achieved in that the axes of rotation of the adjacent rollers belonging to a respective roller arrangement are inclined relative to one another.
  • roller arrangements lying on both sides of the grinding shoe will advantageously be designed according to the invention.
  • the abrasive belt lying on the roller arrangement according to the invention over a certain deflection angle range undergoes a continuous profile change due to the mutually inclined axes of rotation of the adjacent rollers.
  • the grinding is running just taped onto the roller arrangement according to the invention, the rollers forming a flat profile at the point of impact and at least over a large part of the sanding belt width lie flat against the sanding belt, and leaves the roller arrangement with an approximately convex profile. It is essential that during the entire continuous change in the profile of the grinding belt on the roller arrangement, this abuts the rollers over a large part of its width. A continuous pulling apart of the grinding belt transversely to its running direction or a smoothing of the belt is thus achieved. Throw-overs and entanglements of the sanding belt are successfully prevented even with a weakened base and high belt speeds.
  • a smoothing effect can also be achieved by pre-profiling the grinding belt similar to the profiling of a grinding shoe or a profiled contact disk.
  • roller arrangement according to the invention can be used instead of the previous deflection or drive pulleys.
  • the angle that the axes of rotation of the rollers of the roller arrangement enclose is adjustable.
  • Another preferred embodiment of the subject matter of the invention serves the same purpose, which consists in the fact that the axes of rotation of the outer rollers of the roller arrangement extend beyond them and are each articulated on a machine-fixed holder, the entire roller arrangement being one of the two Bearing points of the axes of rotation on the bracket connecting imaginary axis is pivotable.
  • the angle of the axes of rotation of the rollers that is to say the roller arrangement as such, can remain fixed, and the entire roller arrangement can be rotated relative to the holder, which results in a different effective profiling of the entire roller arrangement due to the inclined axes of rotation.
  • a favorable embodiment in which a simple adjustment of the roller arrangement relative to the holder is possible, consists in that the axis of rotation of at least one roller of the roller arrangement is guided through a rotationally symmetrical bore of the holder, with an axis of rotation, spherical layer-shaped on the inner edge of the bore facing the rollers Surface rests and a nut with a spherical layer-shaped facing the bore Surface is provided which can be screwed onto a thread of the axis of rotation against the outer edge of the bore. If the nut is loose, the roller assembly can be pivoted against the bracket by hand. The nut is then tightened, as a result of which the spherical-layer-shaped surfaces abut firmly on the outer and inner edge of the bore and the position of the axes of rotation with the holder is thus fixed.
  • a roller arrangement with three rollers has proven itself, the width of the two outer rollers preferably being at least three times the width of the central rollers and the central roller being essentially symmetrical to the two outer rollers. It is advantageous if the outer rollers of the roller arrangement are conical with an outwardly decreasing diameter and the central roller is essentially cylindrical, preferably slightly cambered, the contact surface of the central roller radially at least partially over the imaginary connecting surface between the contact surfaces of the outer rollers survives. The middle role takes over a guiding function for the sanding belt, which is always looking for the highest (radially largest) role point.
  • the slots between the rollers resulting from inclined axes of rotation can be restricted to a minimum width.
  • FIG. 1 shows a highly schematic plan view of a profile grinding machine according to the invention and
  • FIG. 2 shows a sectional view of a roller arrangement according to the invention.
  • a textile grinding belt 10 has a large cylindrical drive disc 1, five roller arrangements 2, 3, 4, 5 and 6 according to the invention, as are shown in more detail in FIG. 2, and a profiled grinding shoe 7 in a substantially horizontal plane.
  • the workpiece to be ground (not shown) is guided past the profiled grinding shoe 7 on the grinding table 8.
  • the textile grinding belt 10 experiences a maximum deflection of approximately 70 ° per roller arrangement. With each revolution, the grinding belt 10 lies flat against the cylindrical drive pulley 1 (ie without profiling transversely to the belt running direction) and abuts against the grinding shoe 7 about half a revolution later according to the profile of the grinding shoe 7.
  • roller arrangement 2 to 6 which will be described in more detail below with reference to FIG. 2, continuously pull the sanding belt apart transversely to the belt running direction and thus prevent the weakened textile sanding belt 10 from being thrown over and tangled even at high belt speeds.
  • these roller assemblies 2 to 6 help to protect the sanding belt by continuously changing the profiling of the sanding belt 10 on the roller assemblies 2 to 6 under continuous, full contact over a large part of its width, so that the sanding belt 10 is weakened less from the outset than with conventional tape guides.
  • FIG. 2 shows a roller arrangement according to the invention with three rotatable rollers 11, 12 and 13 made of aluminum lying next to one another transversely to the running direction of the grinding belt (not shown here), the axes of rotation 11a, 12a and 13a of which are inclined to one another.
  • an abrasive belt resting on these rollers 11, 12 and 13 has a different profile, as a result of which its profile changes continuously along the contact surface in the direction of the belt run.
  • the axes of rotation 11a and 12a of the external, conical rollers 11 and 12 are extended outwards beyond them and are each articulated on a holder 14 which is fixed during operation.
  • the three rollers 11, 12 and 13 can be pivoted as a whole without changing their mutual rotational axis position about an imaginary axis 17 connecting the two bearing points 15, 16, and thus the effective profiling resting on the grinding belt can be adjusted.
  • the axis of rotation 12a is guided through a cylindrical bore 18 in the holder 14. At the inner edge of this bore 18 there is a surface 19 which is fixed in the form of a spherical axis and is fixed to the axis of rotation.
  • a nut 20 can be screwed from the outside with its also spherical layer-shaped surface 21 on a thread of the axis of rotation 12a against the outer edge of the bore 18 and thus the position of the roller arrangement relative to the holder 14 can be adjusted.
  • An adaptation to different types of bands and profiles of the exchangeable grinding shoe 7 is thus easily possible.
  • the rollers 11 and 12 are slightly conical and touch the small, middle roller 13, which as Serves as a leading role. As in the exemplary embodiment shown, this can be cylindrical. However, it is also possible that the central roller 13 is slightly cambered and partially protrudes radially beyond the imaginary connecting surface between the contact surfaces of the outer rollers 11, 12, with the result that better tape guidance can be achieved.
  • the rollers of a roller assembly can also be adjusted by adjusting the angle between the individual axes of rotation.
  • the rollers themselves can be profiled or cylindrical and can be made of materials other than aluminum, in particular plastic. It is also conceivable to at least partially drive the rollers of the roller arrangement according to the invention. In principle, it is also possible for the rollers to rest on the grinding side of the grinding belt in certain applications. The number of rolls per roll arrangement can also be different from three.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP87108438A 1986-06-16 1987-06-11 Ponceuse, en particulier ponceuse pour profils Withdrawn EP0249890A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT162086A AT386372B (de) 1986-06-16 1986-06-16 Schleifmaschine, insbesondere profilschleifmaschine
AT1620/86 1986-06-16

Publications (1)

Publication Number Publication Date
EP0249890A1 true EP0249890A1 (fr) 1987-12-23

Family

ID=3517352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108438A Withdrawn EP0249890A1 (fr) 1986-06-16 1987-06-11 Ponceuse, en particulier ponceuse pour profils

Country Status (2)

Country Link
EP (1) EP0249890A1 (fr)
AT (1) AT386372B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110977721A (zh) * 2019-12-31 2020-04-10 奥美森智能装备股份有限公司 一种全自动磨削机构
CN114871912A (zh) * 2022-03-31 2022-08-09 重庆山朕科技发展有限公司 砂带式凸焊电极修磨装置的修磨方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593157A (en) * 1949-06-04 1952-04-15 United States Steel Corp Apparatus for positioning strip
US2701430A (en) * 1952-12-05 1955-02-08 United States Steel Corp Roll assembly for automatically centering a moving strip
US2727400A (en) * 1952-07-28 1955-12-20 United States Steel Corp Apparatus for automatically centering a moving elongated object
DE1005718B (de) * 1955-09-30 1957-04-04 Eduard Righi Bandschleifmaschine
GB799749A (en) * 1955-12-27 1958-08-13 United States Steel Corp Roller conveyor
CH367112A (de) * 1955-10-18 1963-01-31 United States Steel Corp Walze zum Ausrichten eines über sie laufenden Bandes
US3170272A (en) * 1963-06-03 1965-02-23 Richard C Burnham Contour abrading machine and method
US3451658A (en) * 1968-03-20 1969-06-24 Matson C G Jolting apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712204A (en) * 1952-08-22 1955-07-05 Ryman Engineering Company Grinding apparatus of the traveling belt type
DE1105307B (de) * 1955-11-04 1961-04-20 Magna Power Tool Corp Selbsttaetige Spannvorrichtung fuer das Schleifband einer Bandschleifeinrichtung
US3280513A (en) * 1964-07-24 1966-10-25 M & M Res Engineering Co Squeegee sharpener
DE2434637A1 (de) * 1974-07-16 1976-01-29 Gert Krugmann Schleifvorrichtung
DE2459304A1 (de) * 1974-12-14 1976-06-16 Wilfried Wolter Vorsatzgeraet fuer eine bandschleifmaschine
DE2920393A1 (de) * 1979-05-19 1980-11-27 Hermann Frank Maschinenfabrik Bandfuehrungsrolle

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593157A (en) * 1949-06-04 1952-04-15 United States Steel Corp Apparatus for positioning strip
US2727400A (en) * 1952-07-28 1955-12-20 United States Steel Corp Apparatus for automatically centering a moving elongated object
US2701430A (en) * 1952-12-05 1955-02-08 United States Steel Corp Roll assembly for automatically centering a moving strip
DE1005718B (de) * 1955-09-30 1957-04-04 Eduard Righi Bandschleifmaschine
CH367112A (de) * 1955-10-18 1963-01-31 United States Steel Corp Walze zum Ausrichten eines über sie laufenden Bandes
GB799749A (en) * 1955-12-27 1958-08-13 United States Steel Corp Roller conveyor
US3170272A (en) * 1963-06-03 1965-02-23 Richard C Burnham Contour abrading machine and method
US3451658A (en) * 1968-03-20 1969-06-24 Matson C G Jolting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110977721A (zh) * 2019-12-31 2020-04-10 奥美森智能装备股份有限公司 一种全自动磨削机构
CN114871912A (zh) * 2022-03-31 2022-08-09 重庆山朕科技发展有限公司 砂带式凸焊电极修磨装置的修磨方法

Also Published As

Publication number Publication date
AT386372B (de) 1988-08-10
ATA162086A (de) 1988-01-15

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