EP2045039A1 - Disque à affûter ou polir doté d'un insert fileté - Google Patents

Disque à affûter ou polir doté d'un insert fileté Download PDF

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Publication number
EP2045039A1
EP2045039A1 EP08004929A EP08004929A EP2045039A1 EP 2045039 A1 EP2045039 A1 EP 2045039A1 EP 08004929 A EP08004929 A EP 08004929A EP 08004929 A EP08004929 A EP 08004929A EP 2045039 A1 EP2045039 A1 EP 2045039A1
Authority
EP
European Patent Office
Prior art keywords
threaded insert
grinding
region
passage opening
disc
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Withdrawn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
EP08004929A
Other languages
German (de)
English (en)
Inventor
Gerd Eisenblätter
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.)
Gerd Eisenblaetter GmbH
Original Assignee
Gerd Eisenblaetter GmbH
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 Gerd Eisenblaetter GmbH filed Critical Gerd Eisenblaetter GmbH
Publication of EP2045039A1 publication Critical patent/EP2045039A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/20—Mountings for the wheels

Definitions

  • the invention relates to a grinding or polishing wheel, comprising a rotationally symmetrical carrier disk, with a hollow cylindrical passage opening for receiving a drive shaft of a drive machine, wherein the hollow cylinder axis coincides with the axis of rotation; and a threaded insert for a grinding or polishing disc, with a continuous internal thread whose axis of symmetry coincides with the axis of rotation, for receiving a drive shaft of a drive machine.
  • Such machine-operated grinding or polishing wheels are usually bolted to a drive shaft of an electrically operated machine. Since the grinding or polishing wheels are consumables and must be changed more frequently between different grits, a simple mounting option is required. Different mounting systems are offered and used for the different grinding or polishing wheels.
  • the grinding or polishing disc is attached to the drive shaft and then fixed by means of a clamping nut on this.
  • the disc itself comprises an internal thread in the passage opening.
  • the grinding or polishing wheel can be screwed directly onto the drive shaft, which has a corresponding outer thread.
  • the latter variant allows a particularly fast mounting and dismounting of the grinding or polishing wheel.
  • the direction of rotation of the thread of the drive shaft is designed so that the grinding or polishing wheel is constantly tightened during the grinding process and thus can not relax.
  • the object of the invention is therefore to provide a grinding or polishing pad of the type mentioned above, which is suitable for direct mounting on a drive shaft of a drive machine in a simpler and improved manner.
  • a grinding or polishing disc according to the invention, has a carrier disk, which is equipped on its front with abrasive blades and the center has a hollow cylindrical passage opening, wherein in the passage opening a threaded insert is arranged for receiving a drive shaft of a drive machine.
  • the threaded insert in this case has a cylindrical part whose length is shorter than the length of the passage opening itself. In this case, the length of the cylindrical part is dimensioned so that at the back of the grinding or polishing disc an annular recess is formed, which for receiving a disc-shaped paragraph serves on the drive shaft.
  • the length of the recording of the disc-shaped shoulder of the drive shaft should be slightly larger than the height of the shoulder on the drive shaft itself, so that the lower free end of the cylindrical part during the grinding process can still be screwed when tightening in the direction of the drive shaft, so that the threaded insert can be further tightened with the grinding or polishing wheel.
  • a safe operating state during polishing or grinding is generated.
  • the grinding or polishing wheel is placed on the spindle of the drive of the drive machine and turned on manually, where only slightly with your fingers along the peripheral edge of the carrier disk must tighten to get a secure grip of the grinding or polishing disc on the spindle.
  • the carrier disk is then tightened with the threaded insert firmly against the spindle of the drive machine.
  • the grinding or polishing disc has a ring-cylindrical reinforcement projecting along the through-opening on the front side of the carrier disk in order to reinforce the through-opening along its outer opening edge in the direction of the axis of rotation.
  • This reinforcement serves on the one hand as a contact surface for the threaded insert and on the other to extend the passage opening as an additional support surface on the holding spindle of the drive.
  • the grinding or polishing disc of the ring-cylindrical reinforcement on radially outgoing ribs which are arranged on the front side of the carrier disc.
  • the threaded insert has in its first region towards its free end to a widening, so that the free end of the threaded insert is positioned in the pressed-insertion in the carrier disc behind the locking ring snapped.
  • This locking ring is achieved due to production due to removal of the injection core, which remains when the injection core, which is symmetrie employment arranged in the passage opening of the carrier disc, is punched out. This degree of demolition can be further refinished to serve as a locking edge for the threaded insert in this embodiment.
  • the threaded insert in the region which is inserted into the passage opening preferably has a conical widening.
  • this area of the threaded insert may also be created, for example by inserting protruding detents, detent projections created by entrances along the axis of rotation of the threaded insert in the first region or by radial detent rings disposed along the cylindrical periphery of the first region of the threaded insert ,
  • a joining of the threaded insert in the carrier disc need not be limited to a press fit.
  • Other connections are possible, such as by gluing, shrinking, crimping the threaded insert to the carrier plate or vibration welding.
  • the threaded insert according to the invention for a rotationally symmetrical grinding or polishing wheel made of a plastic-natural fiber mixture.
  • the threaded insert is produced in particular from a plastic hemp fiber mixture.
  • the carrier disk is preferably produced by injection molding with the addition of hemp fibers.
  • an environmentally friendly production of both the carrier disk and the threaded insert is possible because the proportion of the plastic is reduced by the proportion of hemp fiber.
  • the admixture of natural fibers, especially hemp fibers, is thereby the increase in the toughness and strength of the parts beneficial.
  • the threaded insert has a first region, which is cylindrical and has a second region, which is formed projecting radially over the first region, wherein the overhanging part of the threaded insert rests on the front side of the carrier wafer.
  • ribs are arranged in the first region of the threaded insert on the outer peripheral surface, which are oriented parallel to the axis of rotation and are formed in their rib height such that the threaded insert in the first region isyoggbar by a press fit into the through hole.
  • the interference fit is to be designed so that a simple tightening the carrier disk with the threaded insert inserted therein on the spindle of the drive machine is possible without the threaded insert in the through hole when tightening the carrier disk rotates.
  • the ribs are designed such that they are formed decreasing in height in the direction of the free end of the first region.
  • the threaded insert on the inner end face of the second area radially projecting anchoring projections, which serve for anchoring to the support disk, in particular on the end face of the projection on the support disk.
  • the cylindrical part of the threaded insert also has, along its peripheral surface, circumferential anchoring projections which likewise serve for anchoring in the carrier plate. These may be formed in addition to, or as an alternative to, the anchoring projections in the second region.
  • the end face of the second region of the threaded insert is formed crowned or rounded.
  • blind holes are appropriate receptacles for hand tools, such. B. face spanner.
  • other defined cross-sectional profiles can be arranged, such as square profiles, triangular profiles or simply grooves.
  • the threaded insert be screwed or solved with the use of wells with defined cross-sectional profiles only with certain hand tools that are provided only by a particular provider.
  • using standard face-hole wrenches allows easy and secure handling of the threaded insert for attachment and removal of the grinding or polishing disc mounted over the threaded insert.
  • At least one welding survey is arranged in the region of the joint between the threaded insert and the carrier disk.
  • Welding surveys have proven to be extremely useful in joining the joining parts threaded insert and carrier disk by means of vibration welding. They melt during vibration welding due to friction between the parts to be joined and ensure a favorable and secure welded connection.
  • the use of welding surveys requires less pressure and thus less energy for joining, so that on the one hand costs are saved and on the other hand less stress on the parts to be joined.
  • Sweat bumps are located either on the inner end face of the threaded insert or on the reinforcement of the carrier disc.
  • Weld surveys are punctiform and / or rib-shaped, wherein they are arranged distributed on a support surface.
  • a plurality of weld projections are arranged rotationally symmetrically about the axis of rotation of the threaded insert.
  • curved, rib-shaped weld projections wherein the curvatures of the rib-shaped weld projections are preferably adapted to the curvature of the peripheral edge of the inner end face, so that the weld projections and the peripheral edge of the inner end face preferably have the same distance from each other.
  • the weld elevations are preferably evenly spaced in the circumferential direction, so that there are free sections between the curved weld elevations without sweat elevation.
  • the weld projections have a tapered, for example, a triangular cross-sectional profile.
  • the height of the weld bumps is only a few tenths mm, in particular 0.3 mm.
  • FIG. 1 shows a sectional view of a grinding or polishing wheel 1.
  • This comprises a carrier plate 2, on which the grinding blades 3 are arranged on the front side V of the grinding or polishing wheel 1.
  • the grinding or polishing wheel 1 has a central, hollow-cylindrical through-opening 4, whose cylinder axis coincides with the axis of rotation of the grinding or polishing wheel 1.
  • the passage opening 4 in this case has a length which is denoted by L2.
  • an annular recess 6 When inserted threaded insert 5 in the passage opening 4 from the direction of the front side V, an annular recess 6 remains on the back R of the support plate 2 left, which provides space for receiving a disc-shaped shoulder of the drive shaft.
  • the threaded insert 5 in this case has a cylindrical part 51.
  • FIG. 2 shows a sectional view of the threaded insert 5, which comprises two areas B1 and B2.
  • the first area B1 has the cylindrical part 51.
  • the second region B2 has the overhanging part 52, which projects over the cylindrical part 51.
  • the length of the cylindrical Part 51 is labeled L1.
  • the length L1 is smaller than the length L2 of the through hole 4 (see FIG. 1 ).
  • the cylindrical member 51 can be used in the direction of the drive shaft when grinding or polishing by tightening.
  • the second region B2 of the threaded insert 5 has an inner end annular surface 56.
  • the end face of the cylindrical part 51 forms the free end 55.
  • the end face of the overhanging part 52 forms the upper end 58 of the threaded insert 5.
  • the threaded insert is at least partially formed from a plastic.
  • a plastic hemp fiber mixture is used as the material.
  • FIGS. 3a and 3b show perspective views of a threaded insert 5 in plan view and bottom view, respectively.
  • the threaded insert 5 on its end face 58 blind holes 10, which serve to receive Stirnloch negotiateln.
  • ribs 54 are arranged, which serve the interference fit of the cylindrical portion 51 in the through hole 4 of the support plate 2.
  • a correspondingly strong or weak interference fit is generated.
  • the side circumferential surface 59 of the overhanging part 52 is formed in a further embodiment at an inclination angle with respect to the end face 58, said angle in the range of 1 ° to 20 °, more preferably in the range of 1 ° to 10 °, and in particular 2 ° is selected to the front side surface.
  • the anchoring projections 57 are formed. These are used for an additional attachment of the threaded insert 5 to the carrier plate 2 during tightening, which is done when grinding or polishing.
  • the anchoring projections 57 can be formed in the form of a sawtooth, triangular or the like in their cross section.
  • the ribs 54 are oriented parallel to the axis of rotation of the threaded insert and equiangularly over the circumference of the first region, here the cylindrical part 51, arranged.
  • the ribs 54 are formed as radial projections which have a height such that an interference fit of the region B1 or cylindrical part 51 into the through-opening 4 is possible.
  • FIG. 4 shows a sectional view of a carrier disk 2.
  • the production step is shown, in which the injection core 11 is still arranged in the region of the passage opening 4.
  • the passage opening 4 is not formed continuously due to the existing injection core 11.
  • the core 11 is simply broken or punched out by exerting an axial force from the region of the passage opening 4.
  • FIG. 5 shows the next step in the production of the carrier disc with internal locking ring 9.
  • the view shows a sectional view of the carrier plate 2, in which the core 11 has already been removed. What remains is a demolition bar, which serves as a detent ring 9.
  • This locking ring 9 can be further reworked to rework the Abbruchgrad or to further define the measure of the locking ring.
  • the locking ring 9 is arranged in the inner circumferential surface of the through hole 4 and preferably oriented orthogonal to the axis of rotation.
  • FIG. 6 shows a sectional view of the support plate 2 with inserted threaded insert 5 and locking ring 9 in the passage opening 4.
  • the threaded insert in the area B1 to the open end 55 is expediently formed widening.
  • the expansion is dimensioned such that in the inserted state of the threaded insert 5 in the passage opening 4, the flared end of the area B1 below the locking ring 9 comes to rest, whereby a locking between the open end 55 and locking ring 9 is generated.
  • this embodiment another possibility of press fitting is realized.
  • FIG. 7 shows a plan view of a grinding or polishing pad 1.
  • the grinding blades 3 are not shown. You can see the front of the sanding or polishing disc.
  • the threaded insert 5 is arranged in the center of the carrier disk 2.
  • the inner end ring surface rests on the reinforcement 7, which is not visible in this plan view.
  • Radially extending from the reinforcement 7 to the outside, ribs 8 are formed, which produce an additional reinforcement of the support disk 2.
  • the ribs 8 are arranged equiangularly between the projection 7 and the region on which the grinding blades 3 are arranged.
  • FIG. 8 shows a sectional view of the threaded insert 5.
  • blind holes 10 are arranged on the end face 58 of the area B2.
  • the cross-sectional area of the blind hole 10 can also be determined individually defined so as to force only special hand tools from a supplier.
  • standardized hand tools such as face spanner or the like. Can be used.
  • FIG. 9 shows a side view of the threaded insert 5.
  • the end face 58 an opening of a blind hole 10 can be seen.
  • the side peripheral surface 59 of the second region B2 is formed with a slight inclination toward the front side surface 58. Particularly preferably, the inclination of about 2 ° is selected.
  • the ribs 54 are arranged in the region B1, which is the cylindrical part 51. In this embodiment, the press fit is produced in the passage opening 4 of the support disk 2 by the ribs.
  • a very good anchoring of the threaded insert 5 in the support plate 2 is also achieved in that the threaded insert has ribs 54 ( Fig. 3a, 3b ), and that complementary recesses (not shown) in the through hole 4 of the support disk 2 are present, which receive the ribs 54.
  • FIG. 10 shows a bottom view of the threaded insert 5 with weld projections 60.
  • four curved, rib-shaped weld projections 60 are located on the inner end face 56, with their curvatures adapted to the curvature of the peripheral edge of the inner end face 56, so that the weld projections 60 and the peripheral edge of the inner end annular surface 56 in the circumferential direction have a constant distance from each other.
  • the weld bumps 60 are uniformly separated from each other by free sections, so that the melt film in the joint area can be evenly distributed in the rubbing direction, ie in the circumferential direction.
  • FIG. 11 shows a cross section of the threaded insert 5 along the line AA FIG. 10 ,
  • the weld bump 60 has a triangular cross-sectional profile with a height of 0.3 mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP08004929A 2007-10-02 2008-03-17 Disque à affûter ou polir doté d'un insert fileté Withdrawn EP2045039A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007047131.0A DE102007047131B4 (de) 2007-10-02 2007-10-02 Rotationssymmetrische Schleif- oder Polierscheibe sowie Gewindeeinsatz hierfür

Publications (1)

Publication Number Publication Date
EP2045039A1 true EP2045039A1 (fr) 2009-04-08

Family

ID=40292468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08004929A Withdrawn EP2045039A1 (fr) 2007-10-02 2008-03-17 Disque à affûter ou polir doté d'un insert fileté

Country Status (3)

Country Link
EP (1) EP2045039A1 (fr)
CA (1) CA2627128C (fr)
DE (1) DE102007047131B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20090034A1 (it) * 2009-05-07 2010-11-08 Giovanni Ficai Sistema di accoppiamento rapido di un disco abrasivo all'albero ruotante di una macchina smerigliatrice portatile

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1884208U (de) * 1963-10-16 1963-12-05 Metabowerke Kg Polierscheibe.
WO1999024222A1 (fr) * 1997-11-10 1999-05-20 Minnesota Mining And Manufacturing Company Bloc support pour articles abrasifs et son procede d'utilisation
DE29906328U1 (de) * 1999-04-09 1999-06-24 SMART INVEST & FINANCE S.A., Tortola, British Virgin Stützteller für rotierende Werkzeuge zur Oberflächenfeinbearbeitung
WO2000038883A1 (fr) * 1998-12-29 2000-07-06 C. Klingspor Gmbh Disque rotatif pour l'usinage de surfaces de materiaux
WO2002060644A1 (fr) * 2000-10-30 2002-08-08 Mackay Joseph H Bati pour articles de polissage abrasifs enduits
US20050085174A1 (en) * 2002-11-20 2005-04-21 Isamu Yanase Rotary abrasive material
DE202005013880U1 (de) * 2005-09-01 2007-01-11 Rhodius Schleifwerkzeuge Gmbh & Co. Kg Vorrichtung zum Trennen und Schleifen, Spannvorrichtung und Werkzeug mit Vibrationsdämpfung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018775C2 (de) 1980-05-16 1982-12-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Einrichtung zum Arretieren der Schleifspindel von Winkelschleifern
DE3826017A1 (de) 1987-09-16 1989-03-30 Metabowerke Kg Vorrichtung zum spannen von scheibenfoermigen werkzeugen an einer handwerkzeugmaschine
JPH1199460A (ja) 1997-09-29 1999-04-13 Yanase Kk 回転研磨具
DE20106228U1 (de) 2001-04-09 2001-06-28 Jobra Metall Gmbh Trägerteller für Lamellenschleifscheiben
CN2552631Y (zh) 2002-06-13 2003-05-28 苏州宝时得电动工具有限公司 具有盘状工具夹紧装置的电动工具机
DE102004022968B3 (de) 2004-05-10 2005-10-27 Jobra Gmbh Mitnehmerscheibe, insbesondere für Lamellenschleifscheiben
ITMO20050327A1 (it) 2005-12-07 2007-06-08 Giovanni Ficai Mola perfezionata

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1884208U (de) * 1963-10-16 1963-12-05 Metabowerke Kg Polierscheibe.
WO1999024222A1 (fr) * 1997-11-10 1999-05-20 Minnesota Mining And Manufacturing Company Bloc support pour articles abrasifs et son procede d'utilisation
WO2000038883A1 (fr) * 1998-12-29 2000-07-06 C. Klingspor Gmbh Disque rotatif pour l'usinage de surfaces de materiaux
DE29906328U1 (de) * 1999-04-09 1999-06-24 SMART INVEST & FINANCE S.A., Tortola, British Virgin Stützteller für rotierende Werkzeuge zur Oberflächenfeinbearbeitung
WO2002060644A1 (fr) * 2000-10-30 2002-08-08 Mackay Joseph H Bati pour articles de polissage abrasifs enduits
US20050085174A1 (en) * 2002-11-20 2005-04-21 Isamu Yanase Rotary abrasive material
DE202005013880U1 (de) * 2005-09-01 2007-01-11 Rhodius Schleifwerkzeuge Gmbh & Co. Kg Vorrichtung zum Trennen und Schleifen, Spannvorrichtung und Werkzeug mit Vibrationsdämpfung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20090034A1 (it) * 2009-05-07 2010-11-08 Giovanni Ficai Sistema di accoppiamento rapido di un disco abrasivo all'albero ruotante di una macchina smerigliatrice portatile
EP2248629A1 (fr) * 2009-05-07 2010-11-10 Giovanni Ficai Système de couplage rapide pour la fixation d'un disque abrasif sur un arbre rotatif d'une affûteuse portable

Also Published As

Publication number Publication date
DE102007047131A1 (de) 2009-04-09
DE102007047131B4 (de) 2018-09-06
CA2627128C (fr) 2012-01-31
CA2627128A1 (fr) 2009-04-02

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