[go: up one dir, main page]

EP2072183A1 - Meuleuse de surfaces - Google Patents

Meuleuse de surfaces Download PDF

Info

Publication number
EP2072183A1
EP2072183A1 EP08008330A EP08008330A EP2072183A1 EP 2072183 A1 EP2072183 A1 EP 2072183A1 EP 08008330 A EP08008330 A EP 08008330A EP 08008330 A EP08008330 A EP 08008330A EP 2072183 A1 EP2072183 A1 EP 2072183A1
Authority
EP
European Patent Office
Prior art keywords
drive shaft
eccentric pin
mass
grinding machine
balancing mass
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Withdrawn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
EP08008330A
Other languages
German (de)
English (en)
Inventor
Alfred Dipl.-Ing. FH Göhring
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.)
J Wagner GmbH
Original Assignee
J Wagner 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 J Wagner GmbH filed Critical J Wagner GmbH
Publication of EP2072183A1 publication Critical patent/EP2072183A1/fr
Withdrawn legal-status Critical Current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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/007—Weight compensation; Temperature compensation; Vibration damping

Definitions

  • the invention relates to a surface grinding machine with an oscillating drivable grinding plate, which is driven via an eccentric aligned with a drive shaft connected to a drive shaft eccentric and wherein on the eccentric and / or the drive shaft a balancing mass is arranged.
  • Such implements are known in a very large number of different configurations, which are offered under the names oscillating, eccentric, delta or multi-sander.
  • oscillating, eccentric, delta or multi-sander By engaging in the grinding plate eccentric pin which is driven in different ways, in this case the grinding plate is placed in an oscillating motion, are caused by the particular in idle vibrations.
  • a compensating mass is often provided on the eccentric pin, which is arranged offset by 180 ° to the eccentricity of the eccentric pin. By this measure, the vibrations caused by the mass imbalance are damped.
  • the damping should be reduced in this case depending on the contact pressure of the grinding plate, so that the optimum contact pressure with the help of the attenuation by the operator to easily determine and thus an optimal work result can be achieved by means of the achievable damping of the grinding machine.
  • this is achieved in a surface grinding machine of the type mentioned above in that the balancing mass is offset in the drive direction of the eccentric pin by about 90 ° relative to the eccentricity of the eccentric pin with respect to the drive shaft on this or the drive shaft.
  • the center of gravity of the balancing mass is rotatable about the axis of rotation of the drive shaft and / or spaced linearly movable and if the balancing mass on the drive shaft or on the eccentric pin in an adjustable angular position and / or at a predeterminable distance from the axis of rotation can be locked, because this allows each user individually arrange the balancing mass such that through this for the corresponding operation with the necessary contact pressure Vibration damping is achieved. Due to these adjustment possibilities, the vibration of the grinding wheel can be damped to almost zero.
  • a particularly advantageous structural attachment of the balancing mass can be achieved if the balancing mass is arranged in the immediate vicinity of the grinding plate, preferably between this and the drive shaft or in a recess provided in the grinding plate on the eccentric pin.
  • a surface grinding machine according to the invention in which the compensating mass is offset relative to the eccentricity of the eccentric pin by about 90 ° on the eccentric pin or the drive shaft, it is easily possible to control the vibrations occurring during operations and this for optimal use of the device.
  • the balancing mass in fact leads the eccentric in the drive direction, so that the force component which is caused by the frictional force between the grinding plate and the workpiece to be machined is compensated and the surface grinding machine is subjected to only slight oscillations as a function of the contact pressure.
  • the unwanted vibrations are compensated, resulting from the contact of the grinding plate with the workpiece to be machined.
  • the operator of the surface grinding machine can be displayed here or this feels this when the grinding plate is pressed with the optimum force, since in this operating state, the lowest vibrations occur.
  • the center of gravity of the balancing mass relative to the eccentricity of the eccentric pin with respect to the drive shaft in an angular range of 60 ° to 180 ° about the axis of rotation of Drive shaft moves and locked in this angular range, so that the user can easily arrange the balancing mass in a predetermined angular position and conveniently spaced from the axis of rotation, in which this has the optimal damping characteristic for the respective operation.
  • the balancing weight is held in a frame by means supported in the frame spindle and if by turning the spindle, the distance of the center of gravity with respect to the axis of rotation of Drive shaft can be changed.
  • FIGS. 1a and 1b illustrated and designated 1 surface grinding machine is used for machining workpieces by grinding with the aid of an oscillating drivable sanding plate 2, to which 4 staples sandpaper 3 is attached.
  • the grinding plate 2 is in this case driven by a motor 12 used in a housing 11 only partially shown, the output shaft 13 is connected via bevel gears 14 and 15 with a supported by means of bearings 17 in the housing 11 drive shaft 16 is drivingly connected.
  • the drive shaft 16 accordingly has an axis of rotation 18, which is subsequently used as a reference point for the attachment and alignment of a balancing mass 31.
  • the drive shaft 16 which can be driven in different ways, is provided with an attached eccentric pin 21, which is rotatably mounted via rolling bearings 22 in a recess 5 incorporated in the grinding plate 2. Furthermore, the balancing mass 31 is arranged on the eccentric pin 21 in order to compensate for the oscillations caused by the oscillating movements of the sanding plate 2.
  • 21 oscillations a are triggered namely by the offset with respect to this with an eccentricity e oscillations, according to FIG. 4 depending on the force exerted on the grinding plate 2 Pressing force P in a conventional grinder according to the dashed line curve I increase.
  • the balancing mass 31 is offset in the drive direction D of the eccentric pin 21 by exactly 90 ° relative to the eccentricity e.
  • the centrifugal force F of the balancing mass 31 thus acts, as shown in the FIGS. 2a and 2 B is drawn by an arrow, parallel to the grinding force S in the direction of movement S of the grinding plate 2, so that in the idle range, although higher vibrations than manual devices without the balancing mass 31 arise because the centrifugal force F of the balancing mass 31 increases the vibration of the disc in idle mode.
  • the direction of the centrifugal force F should be rotated by 180 ° in the direction of the resultant R, so that the force component R of the centrifugal force F in the direction and is fully compensated in the amount. This then leads in the operating state of the surface grinding machine 1 to a vibration-reduced application that is produced with a single grinding wheel 2, so that no transition regions of the existing grinding surface of the grinding wheel 2 are necessary and also ensures extremely easy interchangeability of the sandpaper 4 and the handling of the surface grinding machine 1 is.
  • the leveling compound 31 is inserted directly into the grinding plate 2.
  • a recess 23 is incorporated in this, in which the balance mass 31 rotates.
  • the recess 22 is closed.
  • the centrifugal force F of the balancing mass 31 thus acts directly on the grinding plate 2 without any major overturning moments occurring.
  • FIGS. 1a . 1b . 2a and 2 B is common that the balancing mass 31 has a center of mass MS.
  • This center of gravity MS represents in a mechanically known manner a reference point in which the centrifugal forces F, which arise during the rotation of the balancing mass 31, attack.
  • the point of application of the centrifugal force F in the center of gravity MS is offset by 90 ° to a center axis 20.
  • the center axis 20 is the axis of the center of the axis of rotation 18 and the center of an eccentric axis 19 which in the FIGS. 1a and 2a shown position, take.
  • the angle a 1 of FIG. 2b refers to any rotational position of the balancing mass 31 relative to the starting position after the FIGS. 2a and 2 B ,
  • FIG. 5 It can be seen that the balancing mass 31 is attached directly to the drive shaft 16.
  • the mode of action is identical to that in the FIGS. 1a to 3 explained operation of the surface grinding machine shown there 1.
  • the height of the surface grinding machine 1 can be reduced, because now the length of the eccentric pin 21 can be reduced.
  • FIGS. 6 and 7 It is now shown which adjustment a user of the surface grinding machine 1 has when the balancing mass 31 can be adjusted both in its angular position and with respect to the distance to the axis of rotation 18 of the drive shaft 16.
  • FIG. 6 shows the structural design of the attachment of the balancing mass 31 on the eccentric pin 21; optionally, the balancing mass 31 may also be attached directly to the drive shaft 16.
  • the balancing mass 31 is supported in a frame 32 by means of a spindle 33. Due to the fact that the balancing mass 31 and thus its center of gravity MS can be moved by turning the spindle 33 in the direction of the axis of rotation 18 of the drive shaft 16 or away from it, the centrifugal force F is influenced.
  • the centrifugal force F is offset by 60 ° to the eccentricity e of the eccentric pin 21.
  • the frame 32 is held by means of a screw 36 on the eccentric pin 21 pivotally.
  • the screw 36 By loosening the screw 36 namely the contact pressure of the frame 32 is reduced in the circumferential direction on the eccentric pin 21, so that the frame 32 and thus the balancing mass 31 relative to the eccentric pin 21 or when the frame 32 is attached to the drive shaft 16 relative to this, twisted.
  • the balancing mass 31 in its angular position be changed over the eccentricity e.
  • the angular position of the balancing mass 31 with respect to its center of mass MS therefore extends in a freely selectable angular range between preferably 60 ° to 180 °.
  • the linear distance between the axis of rotation 18 and the center of gravity MS of the balancing mass 31 can be adjusted by turning the spindle 33, whereby the balancing mass 31 is movable radially and radially from the axis of rotation 18 and the eccentric axis 19 and selectively fixed.
  • a scale 35 is provided both on the drive shaft 16 or the eccentric pin 21 and on the frame 32.
  • the scale associated with the drive shaft 16 indicates an angular range within which the balancing mass 31 can be aligned together with the frame 32 about the axis of rotation 18 of the drive shaft 16.
  • the balancing mass 31 is deflected at an angle of 60 ° with respect to the direction of rotation D to the central point axis 20 formed by the centers of the axis of rotation 18 and the center axis of the eccentric pin 21.
  • the deflection of the balancing mass 31 can therefore be set in any position as a function of the force to be applied and the constitution of the user of the surface grinding machine 1.
  • the provided on the frame 32 scale 35 is in linear relationship with the distance, the center of gravity MS of the balancing mass 31 based on the axis of rotation 18 of the drive shaft 16 occupies.
  • FIG. 7 the course of the vibration damping can be taken.
  • the curve III shows the surface grinder 1 in that operating point when the adjustable balancing mass 31 extends as close as possible to the axis of rotation 18. The optimum operating point A III is thus achieved at low contact pressure P.
  • the curve IV shows the surface grinder 1 at that operating point A when the adjustable balancing mass 31 as far as possible away from the axis of rotation 18 is arranged. The optimum operating point A-IV is thus achieved at high contact pressure P.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP08008330A 2007-12-22 2008-05-02 Meuleuse de surfaces Withdrawn EP2072183A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710062560 DE102007062560A1 (de) 2007-12-22 2007-12-22 Flächenschleifmaschine

Publications (1)

Publication Number Publication Date
EP2072183A1 true EP2072183A1 (fr) 2009-06-24

Family

ID=40473689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08008330A Withdrawn EP2072183A1 (fr) 2007-12-22 2008-05-02 Meuleuse de surfaces

Country Status (2)

Country Link
EP (1) EP2072183A1 (fr)
DE (1) DE102007062560A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102514902A (zh) * 2012-01-13 2012-06-27 冠亚机械工业（昆山）有限公司 四轮台车
CN103567842A (zh) * 2012-08-07 2014-02-12 苏州宝时得电动工具有限公司 磨削动力工具
WO2014023229A1 (fr) * 2012-08-07 2014-02-13 苏州宝时得电动工具有限公司 Outil de meulage électrique
EP3501365A1 (fr) * 2017-12-21 2019-06-26 Vorwerk & Co. Interholding GmbH Système d'entraînement destiné à l'entraînement excentrique d'un élément libre et appareil de nettoyage humide doté d'un système d'entraînement
EP3616837A3 (fr) * 2018-08-30 2020-03-18 Lake Country Tool, LLC Dispositif de course réglable à came
CN112454070A (zh) * 2019-09-06 2021-03-09 明达医学科技股份有限公司 眼镜镜片加工装置的校正方法
CN117103118A (zh) * 2023-08-30 2023-11-24 重庆美心翼申机械股份有限公司 一种偏心轴磨平面夹具
US11878391B2 (en) 2022-03-04 2024-01-23 Lake Country Tool, Llc Adjustable stroke device
US11927250B2 (en) 2017-10-30 2024-03-12 Lake Country Tool, Llc Adjustable stroke device with cam
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics
US12449024B2 (en) 2021-01-20 2025-10-21 Lake Country Tool, Llc Adjustable stroke device with cam

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0203255A2 (fr) * 1985-05-25 1986-12-03 Festo KG Ponçeuse vibrante équilibrée
EP0303955A1 (fr) * 1987-08-18 1989-02-22 Miksa Marton Meuleuse portative
WO2007000074A1 (fr) 2005-06-27 2007-01-04 Positec Power Tools (Suzhou) Co., Ltd. Dispositif anti-vibration pour machine abrasive, machine comportant ledit dispositif et procédé de nettoyage de surface de pièce de fabrication
DE102006034078A1 (de) 2006-06-02 2007-12-06 Robert Bosch Gmbh Schleifhandwerkzeugmaschine sowie Vibrationsentkopplungsvorrichtung einer Schleifhandwerkzeugmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0203255A2 (fr) * 1985-05-25 1986-12-03 Festo KG Ponçeuse vibrante équilibrée
EP0303955A1 (fr) * 1987-08-18 1989-02-22 Miksa Marton Meuleuse portative
WO2007000074A1 (fr) 2005-06-27 2007-01-04 Positec Power Tools (Suzhou) Co., Ltd. Dispositif anti-vibration pour machine abrasive, machine comportant ledit dispositif et procédé de nettoyage de surface de pièce de fabrication
DE102006034078A1 (de) 2006-06-02 2007-12-06 Robert Bosch Gmbh Schleifhandwerkzeugmaschine sowie Vibrationsentkopplungsvorrichtung einer Schleifhandwerkzeugmaschine

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102514902A (zh) * 2012-01-13 2012-06-27 冠亚机械工业（昆山）有限公司 四轮台车
CN103567842A (zh) * 2012-08-07 2014-02-12 苏州宝时得电动工具有限公司 磨削动力工具
WO2014023229A1 (fr) * 2012-08-07 2014-02-13 苏州宝时得电动工具有限公司 Outil de meulage électrique
CN103567842B (zh) * 2012-08-07 2017-02-08 苏州宝时得电动工具有限公司 磨削动力工具
US11927250B2 (en) 2017-10-30 2024-03-12 Lake Country Tool, Llc Adjustable stroke device with cam
US12188544B2 (en) 2017-10-30 2025-01-07 Lake Country Tool, Llc Adjustable stroke device with cam
EP3501365A1 (fr) * 2017-12-21 2019-06-26 Vorwerk & Co. Interholding GmbH Système d'entraînement destiné à l'entraînement excentrique d'un élément libre et appareil de nettoyage humide doté d'un système d'entraînement
EP3616837A3 (fr) * 2018-08-30 2020-03-18 Lake Country Tool, LLC Dispositif de course réglable à came
US11592055B2 (en) 2018-08-30 2023-02-28 Lake Country Tool, Llc Adjustable stroke device with cam
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics
CN112454070A (zh) * 2019-09-06 2021-03-09 明达医学科技股份有限公司 眼镜镜片加工装置的校正方法
US12449024B2 (en) 2021-01-20 2025-10-21 Lake Country Tool, Llc Adjustable stroke device with cam
US11878391B2 (en) 2022-03-04 2024-01-23 Lake Country Tool, Llc Adjustable stroke device
US12226872B2 (en) 2022-03-04 2025-02-18 Lake Country Tool, Llc Adjustable stroke device
CN117103118A (zh) * 2023-08-30 2023-11-24 重庆美心翼申机械股份有限公司 一种偏心轴磨平面夹具

Also Published As

Publication number Publication date
DE102007062560A1 (de) 2009-06-25

Similar Documents

Publication Publication Date Title
EP2072183A1 (fr) Meuleuse de surfaces
DE3518984C2 (fr)
EP2740846B1 (fr) Machine de compactage
EP2688714A1 (fr) Outil manuel entraîné en rotation par oscillations
DE102008050576A1 (de) Vorrichtung zur Erzeugung einer Kreisschwingung oder einer gerichteten Schwingung mit stufenlos verstellbarer Schwingungsamplitude bzw. Erregerkraft
DE2553800A1 (de) Unwuchtantriebseinrichtung
EP1990133B1 (fr) Agrégat de ponçage comme outil pour un dispositif de traitement
DE19547043C2 (de) Schwingungserreger zum Erzeugen einer gerichteten Schwingung
DE3625655C1 (de) Exzentertellerschleifer
EP1305121B1 (fr) Vibreur reglable
DE2409417A1 (de) Schwingungserreger mit zwei relativ zueinander in der phasenlage kontinuierlich verstellbaren unwuchten
DE3727487C2 (fr)
EP2377647B1 (fr) Outil manuel
WO1998006526A1 (fr) Appareil pour l'usinage des extremites de tubes
EP2242590B1 (fr) Excitateur à balourds comprenant un ou plusieurs balourds rotatifs
DE10105687B4 (de) Schwingungserreger für lenkbare Bodenverdichtungsvorrichtungen
DE2231338B2 (de) Rotationsvibrator
DE3326854A1 (de) Handwerkzeugmashine mit doppeltexzentrisch gelagerter werkzeugplatte
DE2723916A1 (de) Werkzeugmaschine
DE9300016U1 (de) Exzentertellerschleifer mit Schleiftellerbremse
DE102019124761A1 (de) Angetriebener Werkzeughalter mit Mehrfach-Turbine
EP0824971B1 (fr) Générateur de vibrations
DE202004014585U1 (de) Schwingungserreger
DE1143733B (de) Maschine zum Feinbearbeiten vorgearbeiteter Zentrierbohrungen
DE102014107247A1 (de) Vorrichtung und Verfahren zur Bearbeitung von Werkstücken

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: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20091229

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566