EP0836542A1 - Machine-outil manuelle a rectifier et outil a rectifier - Google Patents

Machine-outil manuelle a rectifier et outil a rectifier

Info

Publication number
EP0836542A1
EP0836542A1 EP96918586A EP96918586A EP0836542A1 EP 0836542 A1 EP0836542 A1 EP 0836542A1 EP 96918586 A EP96918586 A EP 96918586A EP 96918586 A EP96918586 A EP 96918586A EP 0836542 A1 EP0836542 A1 EP 0836542A1
Authority
EP
European Patent Office
Prior art keywords
cushion
grinding
tool
grinder according
hand grinder
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.)
Granted
Application number
EP96918586A
Other languages
German (de)
English (en)
Other versions
EP0836542B1 (fr
Inventor
Joachim Schadow
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0836542A1 publication Critical patent/EP0836542A1/fr
Application granted granted Critical
Publication of EP0836542B1 publication Critical patent/EP0836542B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor

Definitions

  • the invention is based on a hand-held grinding machine tool and a tool according to the preamble of claims 1 and 10.
  • Manual grinding machine tools are already known in which between the part performing the grinding movement, i.e. an elastic pad is arranged on the sanding plate and the surface abrasive, in particular the sanding sheet.
  • the elastic cushion causes a large pressure distribution between the hand grinding tool and the workpiece, so that uniform material removal from the workpiece surface is possible.
  • the cushions known hitherto are essentially flat bodies, which work satisfactorily when lying on flat workpiece surfaces, but which are not very suitable for machining profiled surfaces, because they come into contact with lines or points and, as a result, result in grinding abrasion destroy profiled surfaces.
  • the use of profile cushions with the negative profile of the workpiece surfaces is not known.
  • the hand tool according to the invention or the corresponding tool with the characterizing features of the independent claims 1 and 5 have the advantage over the fact that a grinding tool which can be quickly adapted to the workpiece profiles exists and with which the extremely time-saving and exactly also relatively complicated surface profiles bear - are editable such as Turned banister handrails or elongated, cylindrical bodies such as boat hulls or aircraft parts.
  • the elastic cushion forms an impression of the workpiece surface to be machined, in that after the tool has been stamped onto the workpiece surface with the cushion, the air is filled with soft or hard, coarse or fine-grained granules airtight pillow is pumped outside.
  • the cushion now retains the shape of the workpiece surface. With this cushion, both reciprocating as well as rotating driven sanding pads of hand grinders can be equipped.
  • the sanding plate is moved to the other plant again piece placed, whereby the vacuum is removed by opening a valve in the sanding pad.
  • the granulate parts can rearrange and form an impression of a workpiece surface again.
  • the cushion cover has an elastic, balloon-like structure, so that it can be inflated before being filled with granules and does not form folds during the subsequent air evacuation if the cushion volume is reduced.
  • the granular filling consists of porous, elastic material, so that the cushion can yield elastically when placed on a workpiece and a gentle pressure transmission takes place or too hard does not occur.
  • the elastic cushion is provided with a retractable valve that does not hinder the operation of the grinding tool and if the hand-held machine tool carries a vacuum pump so that it cannot be lost.
  • the air-evacuated cushion filled with elastic granules has the advantage that it can be used both with grinding tools with a rotating grinding tool and with reciprocating or as a base for hand-held belt grinders or as a covering for the drive or deflection roller of hand-held belt grinders , so that with all the known devices that can previously only be used for flat grinding work, arbitrarily profiled workpiece surfaces can be machined to size, over a large area, the grinding pad hardness being variable by more or less strong evacuation. Both the base and the end faces of the cushion can be profiled as required and used for grinding.
  • FIG. 1 shows a linear grinder with a longitudinally profiled, elastic cushion in partial longitudinal section
  • FIG. 2 shows a front view of the linear grinder according to FIG. 1
  • FIG. 3 shows an eccentric grinder, the grinding plate cushion of which has a concavely curved working surface
  • FIG. 4 shows a belt grinder profilable cushion instead of a pressure plate 5 shows a cross section of the cushion and the sanding belt according to FIG. 4.
  • the linear grinder 10 shown in Figure 1 consists of a motor housing 12 with a handle 14 which carries a key 16 of an on and off switch, not shown.
  • a drive shaft 18 emerging downward from the motor housing 12 carries an eccentric pin 20 which is coupled via roller bearings 22 to a movement transmission element 24 and via this to a grinding plate 26.
  • the grinding plate 26 is fastened to the motor housing 12 of the linear grinder 10 via elastic vibrating columns 28, 29.
  • the grinding plate 26 is a flat sheet metal part and carries an elastic cushion 30 on its lower side. This consists of a gas-tight outer skin 32 and a filling 34, which consists of a granulate, in particular made of plastic.
  • the elastic cushion 30 In its upper area facing the grinding plate 26, the elastic cushion 30 carries a valve 36, which is covered with a valve cover cap 38 to protect it from dust.
  • the underside 31 of the cushion 30 carries a sliding sheet 33 which adapts to a longitudinally concave profile of the underside 31.
  • a continuous Line shows a profile edge 37 embossed deeply into the underside 31 of the cushion 30.
  • FIG. 2 shows a view of the linear grinder 10 from the front.
  • the double concave underside 31 of the pad 30, which adapts the sanding sheet 33, can be clearly seen here, for example by fastening with a Velcro fastener. If this cushion 30 is placed on a corresponding profile to which it was previously adapted, the curved surfaces of the workpiece can thus be machined over a large area with uniform pressure in the longitudinal direction.
  • an eccentric grinder 50 is shown with a motor housing 52 which is provided with a handle 54 which carries a button 56 of an electrical on and off switch.
  • the orbital sander 50 carries a sanding plate 58 with an elastic cushion 60, which is provided with a gas-tight skin 62 and with a filling 64 is filled from elastic granules.
  • the working surface 66 of the elastic pad 60 carries an abrasive sheet 68 and is concavely curved as an imprint of a convex workpiece with a radius of curvature R.
  • the abrasive sheet 68 adapts to the concave shape of the working surface 66 and can thus be rotated about its vertical axis when the abrasive disc 58 is rotated. For example, in the direction of arrow 69, machine a workpiece surface that is convexly curved with radius R over a large area.
  • the elastic cushion 60 carries on its upper side a valve 70 which can be closed in a dust-tight manner with a valve cover cap 72.
  • the hand-held belt sander 80 shown in FIG. 4 consists of a housing 82 with a handle 84.
  • the handle 84 carries a key 86 of an electrical on and off switch, not shown.
  • the hand belt sander 80 carries two axially parallel rollers 88, 90 with a circumferential grinding belt 92. Between the rollers 88, 90 there is a pressure plate 94, which is the underside of an elastic cushion which is provided with a filling 96 which is made of elastic granules exist. On its upper side, the pressure plate 94 carries a valve 98 with a cover cap 100.
  • the roller 90 also carries a hollow cylindrical, pillow-like casing 102.
  • the casing 102 is provided with a filling 103 made of elastic granules.
  • the roller 90 carries a valve 104 which can be closed with a cover cap (not shown).
  • FIG. 5 shows a cross section through the pressure plate 94, the concave profile 95 of which can be seen with the radius R.
  • the grinding belt 92 adapts to this profile 95 shape with its curvature 93 without further ado. If the hand belt sander 80 is guided over a tube which is convexly curved with the radius R, this is particularly effective and can be sanded over a large area quickly. Here there is a large-area contact between the sanding belt 92 and the curved workpiece and not a line contact as in the case of flat hand-belt sanders.
  • an elastic cushion is inflated like a balloon and filled with granules. By releasing the excess pressure from this cushion, the granulate is pressed together by the cushion's structural elasticity. Only a slight negative pressure is required here in order to make impressions of the workpiece surfaces to be machined by means of the cushion.
  • the use of granules, the individual granulate bodies of which have a high roughness or non-round surfaces, which promote interlocking of the granulate bodies, is particularly advantageous for a dimensional stability of the pillow even with high forces acting on the pillow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Abstract

La rectifieuse manuelle décrite (10; 50; 80) pourvue d'un outil à rectifier comprend un coussin élastique (30; 60; 94) situé entre un milieu abrasif, notamment une feuille abrasive, et une plaque de frottement. Afin de rendre cette rectifieuse manuelle particulièrement utile pour traiter des pièces profilées, le coussin (30; 60; 94) est un contenant facilement déformable de volume variable qui peut être fermé de manière étanche aux gaz et vidé de son air et qui peut être rempli de granulés ou d'autres matières similaires de remplissage (34; 64; 96).
EP96918586A 1995-07-01 1996-06-19 Machine-outil manuelle a rectifier et outil a rectifier Expired - Lifetime EP0836542B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19524084 1995-07-01
DE19524084A DE19524084A1 (de) 1995-07-01 1995-07-01 Handschleifwerkzeugmaschine und Schleifwerkzeug
PCT/DE1996/001080 WO1997002111A1 (fr) 1995-07-01 1996-06-19 Machine-outil manuelle a rectifier et outil a rectifier

Publications (2)

Publication Number Publication Date
EP0836542A1 true EP0836542A1 (fr) 1998-04-22
EP0836542B1 EP0836542B1 (fr) 2000-10-18

Family

ID=7765811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96918586A Expired - Lifetime EP0836542B1 (fr) 1995-07-01 1996-06-19 Machine-outil manuelle a rectifier et outil a rectifier

Country Status (6)

Country Link
US (1) US5931727A (fr)
EP (1) EP0836542B1 (fr)
JP (1) JPH11508494A (fr)
CN (1) CN1116961C (fr)
DE (2) DE19524084A1 (fr)
WO (1) WO1997002111A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6599624B2 (en) 1999-12-15 2003-07-29 Tesa Ag Adhesive tape with thermally curable backing for masking a cathodic electrocoat primer

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6044512A (en) * 1997-05-19 2000-04-04 Lake Country Manufacturing, Inc. Foam buffing pad and method of manufacture thereof
DE19820873A1 (de) * 1998-05-09 1999-11-11 Bosch Gmbh Robert Elektrohandwerkzeugmaschine, insbesondere Handschleifmaschine
DE19848918A1 (de) 1998-07-28 2000-02-10 Bernhard Ganser Schleifvorrichtung für gebogene Flächen
DE20023967U1 (de) * 2000-03-14 2008-02-28 Robert Bosch Gmbh Elektrohandschleifmaschine, insbesondere Exzenterschleifer
DE10065531A1 (de) * 2000-12-29 2002-07-11 Adrian Riegel Schleifvorrichtung
US7503838B2 (en) * 2005-03-24 2009-03-17 Black & Decker Inc. Belt sander
US7618306B2 (en) * 2005-09-22 2009-11-17 3M Innovative Properties Company Conformable abrasive articles and methods of making and using the same
US20070066186A1 (en) * 2005-09-22 2007-03-22 3M Innovative Properties Company Flexible abrasive article and methods of making and using the same
ATE476276T1 (de) * 2007-06-22 2010-08-15 Metabowerke Gmbh Schleifwerkzeuggerät
DE102008055055B4 (de) 2008-12-22 2021-11-04 Robert Bosch Gmbh Handwerkzeugmaschine mit schwingungsgedämpfter Fußplatte
US20130333176A1 (en) * 2012-06-14 2013-12-19 Sean Anthony Macken Device and associated crack repair system
US10130229B2 (en) * 2013-03-28 2018-11-20 Yale Merret Smith Efficient surface treating machine
CN105999664A (zh) * 2016-06-20 2016-10-12 烟台南山学院 一种乒乓球拍反胶胶皮修复器及其修复方法
CN112192397B (zh) * 2020-10-12 2021-11-19 芜湖天锐捷精密电子设备有限公司 一种具有手持冲洗打磨一体式的打磨机及其使用方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399578A (en) * 1981-08-21 1983-08-23 Bordeaux Willard A Tool for cleaning bathtub
US4510718A (en) * 1983-02-15 1985-04-16 Irving Loube Hull sanding device
FR2612823B1 (fr) * 1987-03-27 1994-02-25 Essilor Internal Cie Gle Optique Outil a depression autoconformable a la surface d'une lentille ophtalmique et utilisable notamment comme tampon applicateur ou polissoir
US5672096A (en) * 1996-05-22 1997-09-30 R. P. Abrasives & Machine, Inc. Inflatable tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9702111A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6599624B2 (en) 1999-12-15 2003-07-29 Tesa Ag Adhesive tape with thermally curable backing for masking a cathodic electrocoat primer

Also Published As

Publication number Publication date
CN1189794A (zh) 1998-08-05
US5931727A (en) 1999-08-03
EP0836542B1 (fr) 2000-10-18
CN1116961C (zh) 2003-08-06
JPH11508494A (ja) 1999-07-27
WO1997002111A1 (fr) 1997-01-23
DE59606029D1 (de) 2000-11-23
DE19524084A1 (de) 1997-01-02

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