EP0322613B1 - Roue de contact pour supporter une bande abrasive en rotation - Google Patents

Roue de contact pour supporter une bande abrasive en rotation Download PDF

Info

Publication number
EP0322613B1
EP0322613B1 EP88120538A EP88120538A EP0322613B1 EP 0322613 B1 EP0322613 B1 EP 0322613B1 EP 88120538 A EP88120538 A EP 88120538A EP 88120538 A EP88120538 A EP 88120538A EP 0322613 B1 EP0322613 B1 EP 0322613B1
Authority
EP
European Patent Office
Prior art keywords
disc
belt
strips
leading edges
webs
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
Application number
EP88120538A
Other languages
German (de)
English (en)
Other versions
EP0322613A3 (en
EP0322613A2 (fr
Inventor
Edmund Vahrenholt
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.)
FRIEDRICH AUGUST PICARD KG
Original Assignee
FRIEDRICH AUGUST PICARD KG
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 FRIEDRICH AUGUST PICARD KG filed Critical FRIEDRICH AUGUST PICARD KG
Priority to AT88120538T priority Critical patent/ATE75648T1/de
Publication of EP0322613A2 publication Critical patent/EP0322613A2/fr
Publication of EP0322613A3 publication Critical patent/EP0322613A3/de
Application granted granted Critical
Publication of EP0322613B1 publication Critical patent/EP0322613B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to a contact disc for supporting a circumferential grinding belt, with a belt running pad arranged all around on the wheel body, which has belt supporting webs distributed over the circumference and which are formed with belt running edges arranged at uneven distances from one another.
  • Such a contact disk is known from FR-A-1 381 341.
  • Such contact discs are rotatable and are used in belt grinding devices to support a rotating grinding belt.
  • the running pad is a flexible covering of the support disc.
  • the hardness of the running pad is chosen the greater the larger the chip removal should be. The smaller the workpiece shape, the more this is required.
  • the webs supporting the belt are arranged more or less transversely to the direction of rotation.
  • the time span volume is significantly increased by the webs of the contact disk.
  • Such webs have the disadvantage that the noise pollution of the grinder increases very considerably. The noise comes from that the webs or their leading edges converge with the tape. In particular, there are howl tones, the frequencies of which depend on the number of webs on the contact disk and their speed.
  • a contact disk is known from FR-A-1 381 341, in which the strip leading edges do not run parallel to one another and the strip-supporting webs are consequently trapezoidal. However, it has been shown that such measures are not sufficient.
  • the invention is therefore based on the object of improving a contact disk of the type mentioned in such a way that the acoustic load on the grinder is reduced at a specific grinding performance.
  • the webs causing the aggressive grinding, which support the belt are arranged in a way to avoid howling tones. This avoids a rhythmic run-up of the webs or their belt run-up edges on the back of the grinding belt and thus the howling tone caused by a rhythmic run-up.
  • the mutually different distances can be dimensioned such that there is also a more uniform noise development, the noise formation taking place in frequency ranges which are less disruptive.
  • a metrological check has confirmed the effects described above.
  • the distances between the tape leading edges are at least partially in a non-integer relationship. Howling tone formation is reduced, namely a tone formation that occurs due to the superimposition of harmonic tone vibrations to a howling tone of greater amplitude. In this sense, the distances between the tape leading edges at least partially have no common denominator. Vibration synthesis can also be reduced in this way.
  • the contact disk has webs of unequal width, the web leading edges and webs of equal width between these webs.
  • the slits can be produced by simply cutting or grooving, that is without measures to give the slits different widths. Therefore, in the manufacture of the contact disks, a control that takes into account the unequal width of the webs to the desired extent when adjusting a slotted or saw disk, or with one, is sufficient controlled positioning device for mutually independent webs.
  • the contact disk has webs of the same width, the strip leading edges, and slots of unequal width between these webs, a correspondingly larger proportion of slot area can result with appropriate dimensioning.
  • the slider can penetrate deeper into the tape running pad, making the disc more aggressive. The grinding performance can therefore be increased.
  • the webs are one-piece parts of a belt running pad designed as a laminated circumferential covering.
  • the tape running pad can thus be a one-piece body in a simple manner, the attachment of which to the disk body is problem-free.
  • the conventional construction techniques of the contact disk can be used in realizing the invention in that the webs are lamellae individually fastened to the disk body, which are arranged on the disk body unevenly wide and close to one another, or the same wide and attached to the disc body at a distance from each other are, the unevenly wide spaces forming the slots are each filled with foam.
  • a limited number of strip leading edges arranged at uniform, specific distances from one another is present as a single group of all strip leading edges of the contact disk.
  • Such a single group of tape leading edges can advantageously consist of webs of unequal width with web leading edges and slots of equal width between these webs, or of equally wide webs of tape leading edges and slots of uneven width between these webs.
  • the single group leads to a simplified manufacturing effort, for example to use one and the same slotted or saw disk to produce slots of the same width, but that a howling tone is avoided or a uniform noise development is made possible.
  • the contact disk 1 shown in FIG. 1 essentially consists of a disk body 3 with an axis of rotation 9 about which the contact disk rotates in the direction of arrow 10.
  • the disk body 3 consists, for example, of a light metal alloy and has a clamping recess (not shown) in the region of its axis of rotation 9 and is essentially plate-shaped, with a disk flange 11 arranged transversely to the disk plane being present on the outside, which carries a tape run-up cushion 4.
  • the disc flange 11 and the overrun pad 4 have the width B shown in FIG.
  • the contact disc 1 is wrapped on its lower part by a band 2, which is supported on the belt running pad 4 and is held taut in connection with a drive roller, not shown, so that it drives the contact disc 1. This can also drive the belt 2 itself.
  • the band 2 On its outside 13, the band 2 is provided, for example, with a corundum coating, so that an object pressed in direction 14 against the band 2 and the contact disk 1 supporting it is ground.
  • This grinding effect is reinforced by the fact that the tape running pad 4 is not smooth on its outer circumference, but is formed by slots 8 on its outer circumference with a plurality of webs 5.
  • These webs 5 run in the direction of rotation 10 with their front or tape leading edges 6 on the back 14 of the rising run 2 'of the tape 2. Correspondingly, these edges 6 also run onto the object to be ground at point 14 and cause an increased grinding effect there.
  • the formation of the tape overrun pad 4 can be different.
  • FIG. 1 the design of the cushion as a laminated peripheral covering of the flange 11 of the contact disk 1 is shown on the left.
  • the material of this peripheral covering is, for example, a plastic, such as polyurethane. This can be set to different degrees of hardness and is slitable.
  • the slots 8 are produced, for example, with a slot or saw disk, a groove having a groove width determined by the saw blade width being produced by sawing, as can also be seen in FIG.
  • the depth of the slots 8 or the grooves is determined by the intended use of the respective contact disk.
  • the tape running pad 4 can also consist of several close or less close to each other on the outer circumference of the Flange 11 of the contact plate 1 attached individual webs or slats.
  • Fig. 1 shows webs 5 in the middle and right as individual lamellae.
  • the webs 5 of the middle illustration are fastened tightly to one another on the outer circumference of the flange 11, e.g. by gluing.
  • they consist of a comparatively flexible foamed urethane rubber.
  • the webs 5 are arranged so close to one another that the slot 8 between two webs 5 is only very narrow and is weakly wedge-shaped due to the geometry or the curvature of the flange 11.
  • Fig.1 shows on the right as individual lamellae webs 5, which are fastened at a distance from one another on the flange 11 of the contact disk 1, e.g. by gluing.
  • the webs 5 consist, for example, of a plastic, such as urethane rubber.
  • the slot 8 forming the space between two webs 5 is filled with foam, which also serves to dampen noise. From the illustration it can be seen that the webs 5 are all of the same width and can therefore be produced from a single plate material which only has a corresponding thickness. There is therefore a group 7 'of webs 5 of the same width, while the middle figure of FIG. 1 has a group 7' of webs 5a to 5e of the same width. These webs must be cut accordingly from unevenly strong primary material.
  • FIGS. 1 and 2 It can be seen from FIGS. 1 and 2 that the edges 6 of the band-supporting webs 5 are arranged at uneven distances from one another. This results in particular from FIG. 2, where the distances a, b, c, d are different and, for example, have the dimensions 6, 11, 15 and 22 mm in the case of a disc with a diameter of 450 mm.
  • the slots 8 are evenly 5 mm wide. It can also be seen from FIG. that the slots 8 or the webs 5 do not run parallel to the axis of rotation 9, but are inclined at an angle ⁇ , which in FIG. 2 is 45 °, but can generally be in a range between 25 ° and 60 °. The inclination of the slots 8 also serves to reduce the noise generated during grinding.
  • the spacing of the tape leading edges 6 be in a non-integer relationship to one another. This is the case with the web measurements mentioned above, for example, if one takes into account that the groove width is 5 mm, so that the distances between the strip leading edges 6 are 11, 16, 20 and 27 mm. In addition, the distances a, b; c, d; a, c; a, d and b, d have no common denominator, so that a howling tone is also excluded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Claims (6)

  1. Disque de contact (1) pour supporter une bande abrasive circulante (2), comportant un bourrelet de déroulement de bande (4) qui est dispose tout autour du corps de disque (3) et qui possède des nervures (5), réparties sur la circonférence et supportant la bande, qui sont pourvues d'arêtes d'attaque de bande (6) disposées à intervalles irréguliers (a à d) les unes par rapport aux autres, caractérise en ce que les intervalles (a à d) entre les arêtes d'attaque de bande (6) parallèles sont au moins en partie dans un rapport qui n'est pas un nombre entier, et en ce que les intervalles (a à d) entre les arêtes d'attaque de bande (6) n'ont, au moins en partie, aucun dénominateur commun.
  2. Disque de contact selon la revendication 1, caractérisé en ce qu il possède des nervures (5) de largeurs différentes pourvues des arêtes d'attaque de bande (6) et, entre ces nervures (5), des fentes de même largeur.
  3. Disque de contact selon la revendication 1 ou 2, caractérisé en ce qu'il possède des nervures (5) de même largeur pourvues des arêtes d'attaque de bande (6) et, entre ces nervures (5), des fentes (8) de largeurs différentes.
  4. Disque de contact selon l'une des revendications 1 à 3, caractérisé en ce que les nervures (5) sont des éléments réalisés d'une seule pièce avec un bourrelet de déroulement de bande (4) conçu comme un revêtement périphérique en lamelles.
  5. Disque de contact selon l'une des revendications 1 à 4, caractérisé en ce que les nervures (5) consistent en lamelles fixées individuellement sur le corps de disque (3), qui ont des largeurs différentes et sont disposées sur le corps de disque (3) d'une manière très rapprochée, ou qui ont des largeurs identiques et sont fixées sur le corps de disque (3) de façon espacée, les espaces intermédiaires de largeurs différentes définissant les fentes (8) étant remplis chacun de matière alvéolaire.
  6. Disque de contact selon l'une des revendications 1 à 5, caractérisé en ce qu'un nombre limité d'arêtes d'attaque de bande disposées à des intervalles définis réguliers les unes par rapport aux autres est prévu sous la forme d'un groupe individuel de toutes les arêtes d'attaque de bande du disque de contact (1).
EP88120538A 1987-12-30 1988-12-08 Roue de contact pour supporter une bande abrasive en rotation Expired - Lifetime EP0322613B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88120538T ATE75648T1 (de) 1987-12-30 1988-12-08 Kontaktscheibe zum abstuetzen eines umlaufenden schleifbandes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8717098U 1987-12-30
DE8717098U DE8717098U1 (de) 1987-12-30 1987-12-30 Kontaktscheibe zum Abstützen eines umlaufenden Schleifbandes

Publications (3)

Publication Number Publication Date
EP0322613A2 EP0322613A2 (fr) 1989-07-05
EP0322613A3 EP0322613A3 (en) 1990-11-07
EP0322613B1 true EP0322613B1 (fr) 1992-05-06

Family

ID=6815579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88120538A Expired - Lifetime EP0322613B1 (fr) 1987-12-30 1988-12-08 Roue de contact pour supporter une bande abrasive en rotation

Country Status (3)

Country Link
EP (1) EP0322613B1 (fr)
AT (1) ATE75648T1 (fr)
DE (2) DE8717098U1 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1381341A (fr) * 1963-09-18 1964-12-14 Friedr August Picard K G Disque de contact pour polisseuse à courroie

Also Published As

Publication number Publication date
EP0322613A3 (en) 1990-11-07
EP0322613A2 (fr) 1989-07-05
ATE75648T1 (de) 1992-05-15
DE8717098U1 (de) 1989-05-18
DE3870839D1 (de) 1992-06-11

Similar Documents

Publication Publication Date Title
DE69516424T2 (de) Lamellenschleifscheibe, verfahren und vorrichtung zur herstellung derselben
DE4331165C2 (de) Kettenantriebsvorrichtung
WO2000030809A1 (fr) Meule de rectification du type a eventail
EP3135432B1 (fr) Plateau de meule pour un outil electrique portatif et systeme d'outil electrique
EP0212062B1 (fr) Machine à rectifier les surfaces
EP1120198B1 (fr) Outil de meulage, dispositif ainsi équipé et procédé d'usinage de pièces mettant en oeuvre cet outil
EP1215010A2 (fr) Dispositif de meulage
DE60304179T2 (de) Schleifmaschine
DE3114687A1 (de) Schneidblatt
DE4126304A1 (de) Magnetische kassettendiskette
EP0322613B1 (fr) Roue de contact pour supporter une bande abrasive en rotation
DE69307280T2 (de) Schwingungsgedämpfte Tragscheibe für Diamantwerkzeuge
DE20006127U1 (de) Schleiflamelle und Schleifteller mit einer Mehrzahl von solchen
DE3300860C2 (de) Innenlochsäge
DE3020393A1 (de) Vorrichtung zum bandschleifen
DE20106234U1 (de) Schleifvorrichtung
DE102015011442A1 (de) Fächerschleifscheibe, Tragteller dafür und Verfahren zu deren Herstellung
EP1327796B1 (fr) Courroie trapezoidale composite
EP0234359A2 (fr) Outil à poncer pour lattes de bois profilées ou analogues
DE2039568A1 (de) Gezahnte Kontaktscheibe
DE69809579T2 (de) Schleifscheibe
DE7712605U1 (de) Kreissäge, insbesondere zum Zersägen steiniger Materialien
DE130134C (fr)
DE19601702C2 (de) Werkzeug zum Entfernen von über die Werkstückoberfläche hinausragenden Bestandteilen
DE10062473B4 (de) Honring sowie Verfahren zum Herstellen eines Honring-Grundkörpers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE FR LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE FR LI SE

17P Request for examination filed

Effective date: 19910422

17Q First examination report despatched

Effective date: 19910920

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920506

Ref country code: FR

Effective date: 19920506

REF Corresponds to:

Ref document number: 75648

Country of ref document: AT

Date of ref document: 19920515

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3870839

Country of ref document: DE

Date of ref document: 19920611

EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19921208

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19921231

Ref country code: CH

Effective date: 19921231

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020115

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030701