EP0467383A1 - Schleifgerät - Google Patents

Schleifgerät Download PDF

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Publication number
EP0467383A1
EP0467383A1 EP91112101A EP91112101A EP0467383A1 EP 0467383 A1 EP0467383 A1 EP 0467383A1 EP 91112101 A EP91112101 A EP 91112101A EP 91112101 A EP91112101 A EP 91112101A EP 0467383 A1 EP0467383 A1 EP 0467383A1
Authority
EP
European Patent Office
Prior art keywords
grinding device
bracket
axis
grinding
drive motor
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Withdrawn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
EP91112101A
Other languages
German (de)
English (en)
French (fr)
Inventor
Erich Dörhage
Albert Masch.-Ing. Feiffer
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.)
FEIFFER MASCHINEN- und ANLAGENBAU GmbH
Original Assignee
FEIFFER MASCHINEN- und ANLAGENBAU 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 FEIFFER MASCHINEN- und ANLAGENBAU GmbH filed Critical FEIFFER MASCHINEN- und ANLAGENBAU GmbH
Publication of EP0467383A1 publication Critical patent/EP0467383A1/de
Withdrawn legal-status Critical Current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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/40—Processes or apparatus specially adapted for sharpening curved edges

Definitions

  • the invention relates to a grinding device, in particular for re-sharpening silage wagon knives, with a frame on which a two-part, extendable bracket is provided, pivotable about a vertical axis, on which a drive motor with at least one grinding wheel is rotatably mounted and lockable about the axis of the bracket , and with a clamping table for the workpiece provided on the frame.
  • Silage wagon knives generally have a more or less curved, curved knife edge and generally have to be reground after at least two working days.
  • Silage wagon knives from different manufacturers generally also have different curvatures and different lengths.
  • Some manufacturers of silage wagons also produce a grinding device, which includes a mounting device for the special knife type that can be mounted on the clamping table, so that silage wagon knives can then be re-sharpened in this shape.
  • This grinding device can only be used for a second type of knife from the same manufacturer if the holding device on the clamping table is replaced by another holding device which is adapted to the other type of knife.
  • the two-part console consists of two tube sections that can be telescoped and locked.
  • the pipe section with the larger diameter is mounted on the frame of the grinding device so as to be pivotable about a vertical axis and can be adjusted with an adjusting device in the direction of the vertical axis.
  • the drive motor is arranged transversely to the axis of the bracket, which carries a grinding wheel designed as a cup wheel on a stub shaft, which has a comparatively large diameter.
  • the drive motor can be rotated continuously with its axis about the axis of the console, so that the grinding wheel can be brought to the workpiece in a wide variety of grinding positions.
  • the inclination of the motor axis can still be adjusted in stages.
  • a horizontally oriented clamping table for the workpiece to be ground is provided on the frame of the grinding device.
  • the two-part console is designed to be extendable, practically only a radius on which the grinding wheel is guided around the vertical axis can be used.
  • Another disadvantage is that the grinding angle can only be adjusted in steps.
  • An inclination adjustment of the workpiece is not possible.
  • the grinding wheel is unyielding, i.e. not spring-loaded, suspended, so that delicate work by hand is not possible.
  • a grinding device from another manufacturer which is also known for resharpening silage wagon knives, has a drive motor with a cup wheel of relatively large diameter, which is resiliently suspended from a parallelogram handlebar and can be pivoted about a vertical axis.
  • the inclination of the motor axis and thus the grinding wheel is continuously adjustable within a certain range.
  • the swivel radius around the vertical axis is fixed.
  • the clamping table and the type of silage wagon knife in question include a receiving device which is adapted to the respective knife type and when used the silage wagon knife comes into the intended relative position to the grinding wheel.
  • sensitive work can be achieved by varying the contact pressure by hand against the resilient suspension of the drive motor.
  • the disadvantage is that only a swivel radius can be used and this grinding device cannot be used universally either.
  • the invention has for its object to provide a universal grinder with which curved knives, for example silage wagon knives with different curvatures, but also other knives, for example with straight or undulating cutting edges, can be resharpened.
  • curved knives for example silage wagon knives with different curvatures, but also other knives, for example with straight or undulating cutting edges, can be resharpened.
  • the extendable part of the console which carries the drive motor is resiliently supported on an adjustable template by means of a guide carriage, and in that the clamping table is mounted so as to be continuously pivotable about a horizontal axis.
  • the template can be set to different arcs, i.e. arcs with different curvatures.
  • the curvature is adjusted in accordance with the curvature of the knife to be sharpened, so that the drive motor with the grinding wheel is guided exactly on the intended circular arc in accordance with the respective knife type during movements about the vertical axis via the guide carriage.
  • the resilient support enables sensitive regrinding, whereby only as much material is removed from the knife as is necessary for regrinding.
  • the cutting angle of the knife i.e. the angle forming the cutting edge on the knife
  • the grinder can thus be used universally for different curvatures. If the template is not used in a curved shape, but in a straight line or the template has such a straight part, then the grinding wheel is also guided in a straight line, so that it can be used to grind straight knives. Can be advantageous with the new grinder Grinding wheels are used comparatively smaller diameter, which in turn has the further advantage that recesses, for. B. on shaft knives, can also be reground. This would not be possible with a cup wheel of relatively large diameter.
  • the at least two-part extendable bracket also makes it possible to move or guide the drive motor with the grinding wheel in the direction of the vertical axis and in the opposite direction during the grinding work, in order to also be able to carry out grinding work transverse to the direction of extension of the knife. It is particularly useful if the two-part, extendable console has two telescopic tubes with a non-circular cross-section, so that the motor axis is nevertheless prevented from rotating about the console axis in such a mode of operation. This two-part, extendable console with a non-circular cross-section is always effective when the circular arc set on the template has a different radius, the center of which is not in the vertical axis. It goes without saying that a fixation between the two telescopic tubes of non-circular cross-section does not take place as a rule, but that free movement with the described guide function is used here.
  • the drive motor is mounted on a tube which is slidably and fixably mounted in the interior of the two non-circular telescopic tubes. So here is a locking device for blocking the rotatability of the tube about the axis of the bracket, so that the motor axis in its inclination to the vertical can be adjusted and locked in this way. This also makes it possible to change or differentiate between an ongoing and an emerging grinding process.
  • the drive motor can additionally be mounted on a slide which can be moved perpendicularly to the axis of the console. This makes it possible to adjust the average working height with respect to the resilient suspension of the drive motor relative to the workpiece, from which the grinding wheel can then be lowered sensitively onto the workpiece by applying manual pressure against the spring. It is even possible to regrind curved knives only in a certain area, the cutting edge of which is curved in two planes.
  • the clamping table can have a clamping device for clamping the workpiece and can carry an infinitely adjustable stop on both sides to support the workpiece.
  • the clamping device can be designed as a toggle clamp and serves to clamp the workpiece at one point on the clamping table.
  • the rest of the workpiece is supported by the two infinitely adjustable stops, which can be precisely adjusted, so that the workpiece can still be corrected in its relative position to the grinding wheel via the position of the stops.
  • the template is expediently designed in the form of a circular section and has a rectilinear chord and a circular arc piece made of flexible material.
  • the straight chord is used in connection with the guide carriage for the grinding of straight cutting edges.
  • the circular arc piece on the other hand, consists of flexible material in order to bend and fix it with different curvatures according to the respective requirements, so that the guide for the grinding wheel can then be removed via the guide carriage.
  • the template is conveniently arranged removable from the frame, so that the adjustment of the respective curvature of the circular arc piece z. B. can easily be done in a screw under direct comparative investment of the curved silage wagon knife to be ground.
  • the template has set screws for variably adapting the curvature of the circular arc piece.
  • Other embodiments are of course also possible.
  • the entire console is pivotally mounted about a horizontal axis in the area of the vertical axis. This serves once to lift out the console, which can be stored in a lifted state on a settling support or the like. This makes the template accessible and interchangeable. When raised, the grinder can also be used for other grinding work, for example for regrinding drills.
  • the second function of the described horizontal axis is to enable the spring travel of the drive motor with the grinding wheel in the vertical direction.
  • the template is expediently removable from the frame and can be used in two positions rotated by 180 °. This creates the possibility of regrinding straight, convex or concave curved knives.
  • the grinding device can have a device for the metered addition of cooling water.
  • a drive motor is expediently used, which is provided with stub shafts on both sides, so that two different grinding wheels can be used in connection with a drive motor, both of which can also be used as appropriate.
  • the grinding device shown in side view in FIG. 1 has a frame 1 which is designed, for example, as a table top and provided with legs.
  • a bracket 3 is arranged on the frame 1 about a vertical axis 2 in the sense of a double arrow 4 to pivot back and forth in the horizontal plane.
  • a pipe section 5 is welded to the frame 1, in which a journal bearing 6 enables the pivoting about the vertical axis 2.
  • the journal bearing 6 has a horizontal axis 7, with the aid of which the bracket 3 can be pivoted according to a double arrow 8 in a family of vertical planes, all of which pass through the vertical axis 2.
  • a telescopic tube 9 of non-circular cross-section is directly connected to this journal bearing 6, which is an essential part of the console.
  • a further telescopic tube 10 which likewise has a non-circular cross section, can be displaced in the direction of an axis 11 of the console 3, but secured against rotation, guided.
  • the console 3 has a tube 12 with a round cross-section, which is rotatably and axially displaceably mounted in the telescopic tube 10 according to the double arrow 13 in the non-circular cross-section.
  • the tube 12 can be locked in any extended position according to the double arrow 14 and any angular position according to the double arrow 13 on the telescopic tube 10, with a locking device 15, which is indicated here only as a locking screw for clarification.
  • a drive motor 17 is carried by the tube 12, the axis 18 of which can be infinitely adjusted and adjusted in a plane perpendicular to the plane of the drawing along the axis 18, which is done via the locking device 15.
  • the setting is made so that the axis 18 is arranged slightly inclined to the vertical so that the grinding wheel in use reaches a deepest point along its circumference at which it comes into contact with the workpiece to be ground.
  • a slide 20 which is vertically adjustable in accordance with the double arrow 19 and is adjusted via the handwheel 21.
  • the adjustment direction according to double arrow 19 of the carriage 20 is parallel to the axis 18 of the drive motor 17, so that the carriage 20 also comes into this inclined position when the axis 18 is inclined.
  • the drive motor 17 has two shaft ends 22 and 23, on each of which a grinding wheel 24 or 25 is attached.
  • the grinding wheels 24 and 25 can advantageously have different diameters, consist of different grinding materials, etc. Both grinding wheels 24 or 25 can be lowered into a downward working position due to the rotatability according to double arrow 13.
  • a handle 26 is attached to the drive motor 17 for handling.
  • a template 27 is arranged to prevent rotation, which is shown in plan view in FIG.
  • the template 27 has a plate 28 which carries on its underside at least two protruding pins 29, with the aid of which the template 27 can be inserted into the table surface of the frame 1 in a manner secured against rotation.
  • the template 27 has a straight chord 30 in the form of a sheet metal strip welded on edge to the plate 28.
  • the template 27 also has a circular arc piece 31 made of flexible material.
  • the circular arc piece 31 can be mounted, for example in the form of a leaf spring, around an eye 32 on a bolt 33, a counter bearing 34, which expediently surrounds the other end of the leaf spring in a loose and leading manner, is held.
  • Threaded sleeves 35 are fastened, for example welded, to the plate 28, in which adjusting screws 36 are mounted with their threads.
  • the adjusting screws 36 pass through openings 37 in the chord 30.
  • Two adjusting screws 36 are shown here, although the number of adjusting screws can also be increased.
  • Each adjusting screw 36 has a shoe 38 at its front end, by means of which it is supported on the circular arc piece 31. It can be seen that almost any curvature of the circular arc piece 31 can be adjusted by more or less wide rotation of the adjusting screws 36 in the stationary threaded sleeves 35, the free end of the circular arc piece 31 designed as a leaf spring being displaced and supported on the counter bearing 34.
  • a guide carriage 39 works together with this template 27, which expediently has two rollers 40 arranged one behind the other, each of which is mounted on the guide carriage 39 so as to be freely rotatable about vertical axes and thus adjust to the curvature of the circular arc piece 31.
  • the console 3 is via its telescopic tube 10 with a bearing pin 41, which in a bore 42 engages in the guide carriage 39, guided, one or more spring 43 being connected between the guide carriage 39 and the bearing pin 41.
  • the spring 43 holds the weight of the console 3 with the drive motor 17 in the vertical direction in a neutral position.
  • the spring 43 can also be compressed, as a result of which the grinding wheel 24 is sensitively lowered in the working position. It is understood that the carriage 20 is adjusted accordingly to bring about a basic setting.
  • a clamping table 45 which can be pivoted about an axis 44 and which serves to receive a workpiece 46 to be ground with its cutting edge 47.
  • a clamping device 48 is provided on the clamping table 45, which can be designed as a toggle clamp or the like. It is sufficient here to let the tensioning device 48 come into effect at one point.
  • stops 49 and 50 are provided, which can be adjusted in the direction of the double arrows 53 and 54 via manually operated adjusting spindles 51 and 52. The stops 48 and 50 overlap the workpiece 46 on the clamping table 45, as shown in FIG.
  • An actuating device 55 is used for the continuous adjustment and determination of an angle of inclination about the axis 44 according to the double arrow 56.
  • the angle of the cutting edge 47 can thus be set sensitively.
  • Cooling water can be metered in at the grinding point via a device 57.
  • the mode of operation of the grinding device allows the cutting edge 47 of a workpiece 46 to be ground as follows:
  • the bracket 3 is pivoted upward about the axis 7 in accordance with the double arrow 8 and is supported on a bearing block (not shown here), so that the template 27 is freely accessible and can be removed from the frame 1.
  • the circular arc piece 31 is brought into a circular arc shape corresponding to the shape of the cutting edge 47.
  • the template 27 is reinstalled on the frame 1.
  • the console 3 is then lowered so that the two rollers 40 are placed on the rail of the circular arc piece 31.
  • the workpiece 46 is clamped onto the clamping table 45 and the locking device 15 is released so that the drive motor 17 with the tube 12 can be pulled out until the intended relative position of one of the two grinding wheels 24 and 25 to the cutting edge 47 to be resharpened is given. Then the locking device 15 is tightened again and a height correction of the slide 20 is brought about with the aid of the toothed wheel 21, in such a way that, during a pivoting movement according to double arrow 4, the grinding wheel 24 still has no contact with the cutting edge 47 to be resharpened.
  • the grinding wheel 24 Since during the swiveling movement according to double arrow 4, the grinding wheel 24 is guided on a similar circular arc, but its curvature has been changed in accordance with the lifting law, in comparison to the circular arc piece 31, with some practice the circular arc wheel 31 can deviate from the curvature of the cutting edge 47 or of the workpiece 46 can be set so that ultimately the associated circular arc is exactly described by the grinding wheel 24. Minor deviations are not harmful because this only slightly changes the contact area between grinding wheel 24 and cutting edge 47. At the same time or subsequently, the inclination of the clamping table 45 and thus also the cutting edge 47 can be set and determined.
  • the grinding process is then carried out by applying the pivoting movement according to double arrow 4 on the one hand by the action of force on the handle 26 and on the other hand applying an additional force which is exerted from top to bottom in the direction of the workpiece 46 and which compresses the spring 43 slightly further.
  • This enables a sensitive grinding process and resharpening of the cutting edge 47.
  • the height of the different areas of the curved cutting edge 47 can also be compensated for by manual application of force. It can be seen that in this way spatially narrow recesses, for. B. on a wave meter or the like. Can be reground. If the cutting edge 47 is limited in a straight line, the guide carriage 39 is used in connection with the chord 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP91112101A 1990-07-20 1991-07-19 Schleifgerät Withdrawn EP0467383A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4023071 1990-07-20
DE19904023071 DE4023071A1 (de) 1990-07-20 1990-07-20 Schleifgeraet

Publications (1)

Publication Number Publication Date
EP0467383A1 true EP0467383A1 (de) 1992-01-22

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ID=6410660

Family Applications (1)

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EP91112101A Withdrawn EP0467383A1 (de) 1990-07-20 1991-07-19 Schleifgerät

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EP (1) EP0467383A1 (enrdf_load_stackoverflow)
DE (1) DE4023071A1 (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2712222A1 (fr) * 1993-11-10 1995-05-19 Pillet Andre Dispositif d'une machine polyvalente pour l'affûtage de lames pour matériel de boucherie.
EP2014411A1 (fr) 2007-07-10 2009-01-14 Société Deguy-Conge Machine d'affûtage
AT500570B1 (de) * 2003-11-06 2009-05-15 Poettinger Ohg Alois Messerschleifmaschine
CN102145470A (zh) * 2010-02-10 2011-08-10 丁珍华 摆臂式刀具圆弧刃磨机
CN102848286A (zh) * 2012-09-08 2013-01-02 衡阳市金化科技有限公司 一种球形气瓶底部打磨机
EP2810738A1 (de) * 2013-06-07 2014-12-10 Alfred Siemer Vorrichtung zum Schleifen wenigstens eines Messers
CN108637825A (zh) * 2018-06-07 2018-10-12 嘉兴爱劳科斯智能照明有限公司 一种灯座的抛光装置
CN112975690A (zh) * 2021-03-16 2021-06-18 烟台工程职业技术学院(烟台市技师学院) 一种自动化抛光装置及其工作方法
CN116526774A (zh) * 2023-07-03 2023-08-01 苏州百狮腾电气有限公司 一种永磁电机转子加工设备
CN118123257A (zh) * 2024-01-18 2024-06-04 无锡上力电工设备有限公司 一种围栏立柱生产工艺及生产设备
CN118989470A (zh) * 2024-10-23 2024-11-22 江苏亿鑫齿轮制造有限公司 一种磨齿机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352328A1 (de) * 2003-06-25 2005-01-13 Gebr. Pöttinger GmbH Messerschleifmaschine
DE202009015567U1 (de) 2009-11-14 2010-06-17 Hug, Peter Vollautomatisches Schleifgerät zum Nassschleifen von Schneidmessern in landwirtschaftlichen Maschinen, insbesondere Pressen und Ladewagen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE351514C (de) * 1921-05-03 1922-04-08 J Fr Fuchs Fa Maschine zum Schleifen von nach Raumkurven verlaufenden Schneiden an Messerblaettern
DE2542086A1 (de) * 1975-09-20 1977-03-31 Goeckel Gmbh Maschf G Schleifmaschine fuer gekruemmte werkstuecke, insbesondere messer
US4199901A (en) * 1977-07-08 1980-04-29 Lefevre Francois C Grinding machine
DE3511488A1 (de) * 1985-03-29 1986-10-09 Merz GmbH, 6000 Frankfurt Vorrichtung zum schleifen von im wesentlichen kreisfoermig konkav gekruemmten messern

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8230578U1 (de) * 1982-10-30 1983-02-10 Umbach, Albert, 3436 Hessisch Lichtenau Vorrichtung zum schleifen von messern, insbesondere landwirtschaftlichen messern ...

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE351514C (de) * 1921-05-03 1922-04-08 J Fr Fuchs Fa Maschine zum Schleifen von nach Raumkurven verlaufenden Schneiden an Messerblaettern
DE2542086A1 (de) * 1975-09-20 1977-03-31 Goeckel Gmbh Maschf G Schleifmaschine fuer gekruemmte werkstuecke, insbesondere messer
US4199901A (en) * 1977-07-08 1980-04-29 Lefevre Francois C Grinding machine
DE3511488A1 (de) * 1985-03-29 1986-10-09 Merz GmbH, 6000 Frankfurt Vorrichtung zum schleifen von im wesentlichen kreisfoermig konkav gekruemmten messern

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2712222A1 (fr) * 1993-11-10 1995-05-19 Pillet Andre Dispositif d'une machine polyvalente pour l'affûtage de lames pour matériel de boucherie.
AT500570B1 (de) * 2003-11-06 2009-05-15 Poettinger Ohg Alois Messerschleifmaschine
EP2014411A1 (fr) 2007-07-10 2009-01-14 Société Deguy-Conge Machine d'affûtage
FR2918593A1 (fr) * 2007-07-10 2009-01-16 Deguy Conge Soc Par Actions Si Machine d'affutage
CN102145470A (zh) * 2010-02-10 2011-08-10 丁珍华 摆臂式刀具圆弧刃磨机
CN102848286B (zh) * 2012-09-08 2015-10-28 衡阳金化高压容器股份有限公司 一种球形气瓶底部打磨机
CN102848286A (zh) * 2012-09-08 2013-01-02 衡阳市金化科技有限公司 一种球形气瓶底部打磨机
EP2810738A1 (de) * 2013-06-07 2014-12-10 Alfred Siemer Vorrichtung zum Schleifen wenigstens eines Messers
CN108637825A (zh) * 2018-06-07 2018-10-12 嘉兴爱劳科斯智能照明有限公司 一种灯座的抛光装置
CN112975690A (zh) * 2021-03-16 2021-06-18 烟台工程职业技术学院(烟台市技师学院) 一种自动化抛光装置及其工作方法
CN112975690B (zh) * 2021-03-16 2022-03-04 烟台工程职业技术学院(烟台市技师学院) 一种自动化抛光装置及其工作方法
CN116526774A (zh) * 2023-07-03 2023-08-01 苏州百狮腾电气有限公司 一种永磁电机转子加工设备
CN116526774B (zh) * 2023-07-03 2023-09-15 苏州百狮腾电气有限公司 一种永磁电机转子加工设备
CN118123257A (zh) * 2024-01-18 2024-06-04 无锡上力电工设备有限公司 一种围栏立柱生产工艺及生产设备
CN118989470A (zh) * 2024-10-23 2024-11-22 江苏亿鑫齿轮制造有限公司 一种磨齿机

Also Published As

Publication number Publication date
DE4023071A1 (de) 1992-01-23
DE4023071C2 (enrdf_load_stackoverflow) 1992-05-07

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