EP2324953A2 - Grinding machine - Google Patents
Grinding machine Download PDFInfo
- Publication number
- EP2324953A2 EP2324953A2 EP20100190799 EP10190799A EP2324953A2 EP 2324953 A2 EP2324953 A2 EP 2324953A2 EP 20100190799 EP20100190799 EP 20100190799 EP 10190799 A EP10190799 A EP 10190799A EP 2324953 A2 EP2324953 A2 EP 2324953A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- motor
- grinding machine
- blade
- grinding wheel
- 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
Links
- 230000001681 protective effect Effects 0.000 claims description 44
- 238000005498 polishing Methods 0.000 claims description 30
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000001816 cooling Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 241000047428 Halter Species 0.000 description 1
- 241001508764 Wallago Species 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- -1 felt Substances 0.000 description 1
- 235000019688 fish Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
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
- 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
- B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/04—Protective covers for the grinding wheel
Definitions
- the invention relates to a grinding machine according to the preamble of claim 1.
- the grinding machine is particularly intended for grinding and sharpening the blade of a knife, but may also be used to grind the blade from other cutting tools such as hatchets or scissors, or daggers.
- the grinding machine can be used, for example, in food processing plants, for example in catering, meat, fish and vegetable processing plants.
- Knife grinding knives known in the market have a grinding wheel with a cylindrical grinding surface so that the blade of a knife can be slid over the grinding surface approximately parallel to the axis of rotation of the grinding wheel.
- These grinders have an electric motor with a motor housing and a motor shaft and often a polishing pad and / or a protective housing that covers at least large parts of the engine, the grinding wheel and the possible polishing pad.
- the grinding wheel is rotatably mounted with bearings about an axis of rotation and connected by a gear to the motor shaft.
- the axis of rotation of the grinding wheel is offset in such a way against the axis of rotation of the motor shaft, that the blade during grinding on the motor housing and on any Protective housing and / or can be pushed past the possible polishing pad.
- the invention has for its object to provide a grinding machine which avoids the disadvantages of the known grinding machines.
- the grinding machine should in particular be compact and inexpensive to produce.
- the grinding wheel is arranged according to the invention coaxial with the motor shaft and rotatably connected to the motor shaft. This allows a compact design.
- the grinding wheel can be supported by the bearings belonging to the motor, arranged in the motor housing, for supporting the motor shaft as well as the whole rotor of the motor, so that no additional bearings are required for supporting the grinding wheel.
- any existing polishing pad or possibly lapping disc Incidentally, of course, no transmission between the motor shaft and the grinding wheel and a possible polishing or lapping disc available.
- the inventive grinding machine is therefore also economical to produce.
- the inclined with respect to the axis of rotation of the grinding wheel, widening towards the motor housing, preferably approximately or exactly conical grinding surface allows a knife or other tool with a blade during grinding then approximately across the grinding surface and outside of the motor housing and a possible protective housing and / or a possible, also coaxial with the motor shaft polishing pad or possibly lapping disk move past, if the diameter of the grinding wheel is relatively small.
- grinding wheels may be rotated at most with a maximum permissible peripheral speed, so that the diameter of a grinding wheel may not exceed a specific maximum value for a given rotational speed of the grinding wheel.
- the invention also makes it possible to dimension the diameter of the grinding wheel without affecting the displaceability of the blade so small that the grinding wheel may be rotated without risk of damage directly to the speed of the motor.
- the grinding wheel can therefore be readily dimensioned, for example, so that it can be rotated directly with the speed of a single-phase electric asynchronous motor or possibly a three-phase asynchronous motor.
- the speed of the grinding wheel may then be at least 2500 revolutions per minute, preferably at most 3000 revolutions per minute and for example about 2700 to 2950 revolutions per minute when feeding the motor with alternating or three-phase current with a frequency of 50 Hz.
- the in the FIGS. 1 as well as 2 and partly in the Figures 3 and 4 shown grinder 1 has a protective housing 3 with a bottom 5 and a releasably secured to the latter guard 7.
- the bottom 5 has a flat plate, on the underside of feet 9 are attached.
- the protective hood 7 has a front wall 11, an end wall 13 opposite thereto, a cover wall 15 and two mutually opposite side walls 17 and 19.
- the protective housing 3 is generally approximately rectangular in plan.
- the side wall 19 has an adjacent to the end wall 13, parallel to the other side wall 17 side wall portion 21 and a side wall portion 23 whose main portion is inclined vertically and evenly and in plan from the wall portion 21 obliquely to the side wall 17.
- the grinding machine 1 has an electric motor 31 arranged in the protective housing 3, which is completely enclosed by the protective housing at least to a large extent and, for example, essentially - that is, apart from a few cooling holes and other holes.
- the motor 31 has a motor housing 33 with an im Generally cylindrical, for example, provided with cooling fins sheath and a rotor with a rotatably mounted with bearings in the motor housing motor shaft 35.
- the motor housing 33 is releasably secured with fastening means 37 and, for example, vibration damping attached to the bottom 5.
- the motor 31 is designed for example as a single-phase asynchronous motor, but could also consist of a three-phase asynchronous motor.
- the motor shaft 35 is rotatable about an approximately or exactly horizontal, parallel to the side wall 17 and the side wall portion 21 axis of rotation 39 and has closer to the side wall portion 23 and left in the FIGS. 1 to 3 located end of the motor housing 33 a protruding from this section.
- a grinding wheel 41 On the end portion sits a grinding wheel 41 and is releasably secured with fastening means 43, but rigidly and in particular rotationally fixed to the motor shaft.
- the fastening means 43 have, for example, a screw screwed into a threaded bore of the motor shaft.
- the grinding wheel 41 has a conical grinding surface 41a which widens toward the motor housing.
- the grinding surface 41a rotates during grinding, but defines a fixed, coincident with it, the rotation axis 39 enclosing the rotating surface, namely a conical surface, and a cone with a lying on the axis of rotation tip.
- the grinding surface 41a forms with the axis of rotation 39 an angle ⁇ , preferably at least 15 °, preferably at most 60 °, conveniently 20 ° to 40 ° and namely, for example, about 30 °.
- the diameter of the grinding wheel - ie the largest diameter of the conical grinding surface 41a - is preferably at least 100 mm, preferably at most 160 mm and for example 120 mm to 150 mm and is for example approximately the same size as the diameter of the jacket of the motor housing 33, but can also be a bit bigger or smaller than this.
- the grinding wheel 41 is provided on its front side, ie on its side facing away from the motor housing, with a recess 41b. This has, for example, an approximately flat base and a flared thereof away, conical side surface, the other, outer edge is at least approximately at the front edge of the conical grinding surface 41a.
- the grinding wheel has a metallic, for example made of aluminum base body and a grinding surface forming coating of an abrasive material. This contains, for example, boron nitride abrasive grains and a binder.
- a polishing pad 45 or lapping disc 45 is releasably, but rigidly and non-rotatably attached to that end portion of the motor shaft 35, for example, having a screw fastening means 47 which protrudes at the end facing away from the grinding wheel 41 of the motor housing 31 from this.
- the polishing or lapping disc 45 has an approximately cylindrical, for example, for polishing or lapping peripheral surface whose diameter is greater than the diameter of the jacket of the motor housing and the grinding wheel.
- the polishing or lapping disk points For example, interconnected layers of textile fabric, felt, leather or the like.
- the grinding wheel 41 and the polishing or lapping disk 45 are therefore rotatable coaxially with the motor shaft 35 and, like the latter, and the entire rotor of the motor 31 about the common axis of rotation 39, as described above.
- the belonging to the engine, arranged in the motor housing 33, for storing the motor shaft 35 serving bearings thus serve at the same time for storing the grinding wheel and the polishing or lapping disc.
- the protective cover 7 of the protective housing 3 has at the abutting edges of the front wall 11 and the side wall portion 23 in part also in Fig. 4
- the slot-shaped opening 51 is on the one side partly by an edge portion of the front wall 11 and on the other side partly by a fixed to the main plane portion of the side wall portion 23, of This outwardly projecting tabs 53 limited so that at the opening 51 is a more or less vertically extending, laterally limited by surfaces, outwardly open channel 55 results.
- a small peripheral portion of the grinding wheel 41 protrudes at the opening 51 through the protective housing out or at least into the channel 55, so that a peripheral portion of the grinding surface 41 a of the grinding wheel 41 from the outside, that is accessible from the environment of the protective housing ago.
- a protective element 57 made of sheet metal arranged at the upper end of the opening 51 covers a circumferential section of the grinding surface 41a therefrom.
- Support means 61 are arranged in the vicinity of the opening 51 in order to support and / or guide the blade of a knife to be ground in a manner described in greater detail during grinding.
- the support means 61 have a multi-part stop 63 with a holder 65, a head 67 and a screw 69.
- the holder 65 of the stopper 63 is separately in Fig. 8 and consists of a substantially rectangular column with a square, approximately square plan.
- the holder 65 has two threaded holes at the lower end and is fastened to the base 5 with screws screwed into the latter in such a way that the holder is located at least partially in the lower part of the channel 55 and closes the opening 51 there more or less to the outside.
- the upper end surface of the holder is provided with a recess 65a with two straight edges parallel to each other.
- a vertical threaded bore 65b opens into the center of the recess 65a.
- the separately in the FIGS. 9, 10, 11 shown head 67 of the stopper 63 is also more or less parallelepipedic and has a continuous axial hole 67 a with a hole axis 71, which coincides with assembled hole with the hole axis of the threaded bore 65 b of the holder 65 and approximately or runs exactly vertically.
- the hole 67 a contains in the assembled state of the stopper part of the screw 69 and is provided at the upper end with an extension in which the screw head of the screw 69 is seated.
- the head 67 of the stop far at its lower end on a square end portion 67 b.
- the head also has at least an abutment surface, preferably at least two abutment surfaces, and for example three abutment surfaces 67c, 67d, 67e, each of which is formed by one of four side surfaces of the upper end portion of the head 67.
- the three abutment surfaces 67c, 67d, 67e are approximately or exactly planar and have different directions in axial sections through the hole axis 71.
- the abutment surface 67c is, for example, parallel to the hole axis and accordingly approximately or exactly vertical.
- the two other abutment surfaces 67d and 67e are inclined away from the holder 65 upwards to different degrees to the hole axis 71, so that they form with this and with a vertical plane different acute, for example, about 5 ° or about 10 ° amounting angle.
- the square end portion 67b of the head can with respect to the hole axis 71 selectively inserted in different rotational positions of the head fits snugly into the recess 61a of the holder 65 and secured with the screw 69 non-rotatably on the holder.
- the stop is designed and arranged such that, when the stop is assembled, depending on the rotational position of the head 67, one of the three stop surfaces 67c, 67d, 67e selectively faces the grinding surface 41a of the grinding wheel.
- the head 67 is provided under each of its abutment surfaces 67c, 67d, 67e with a flat surface 67f inclined downwards towards the hole axis 71, which is separated from the abutment surface above it by a straight edge 67g.
- the abutment surface 67c or 67d or 67e of the abutment 63 facing the grinding surface 41a defines, together with the peripheral portion facing it, the fixed surface of rotation defined by the grinding surface, ie Tapered surface, a gap 75 which narrows along said peripheral portion from top to bottom to the edge 67g out.
- the narrowest point of the gap 75 located at the edge 67g is dimensioned as narrow as possible and is, for example, approximately 0.1 mm to 0.5 mm wide.
- the edge 67g located below the stop surface facing the grinding surface 41a is preferably approximately at the level of the axis of rotation 39 of the motor shaft and the grinding wheel and / or, for example, slightly above the axis of rotation.
- the abutment is also arranged such that the edge 67g extends approximately horizontally and at least approximately or exactly parallel to a nearby surface line of the cone or conical surface defined by the rotating conical grinding surface 41a in operation.
- the edge may, for example, be slightly above a horizontal plane passing through the axis of rotation 39, exactly horizontal, and approximately or exactly parallel to that surface of the conical surface lying a little below the edge in the horizontal plane passing through the axis of rotation ,
- the straight edge line of the conical surface which is closest to the horizontal edge 67g does not run exactly parallel to the horizontal edge 67g but downwards against a horizontal plane to the rotation axis 39 and the tip of the cone defined by the grinding surface is inclined.
- the stop could possibly also be changed in such a way that the edge 67g lies somewhat further down in the horizontal plane passing through the axis of rotation 39 or indeed is above this horizontal plane, but slightly inclined to it so that it is approximately or exactly parallel to the closest lying on its surface line of the cone surface.
- the support means 61 still have one of the clearest in Fig. 4 apparent support member 77, which consists of an elongated, bent and / or bent piece of sheet metal.
- the upper end portion of the support member 77 is releasably secured with screws on the protective element 57 of the protective cover 7, so that it can be easily disassembled and replaced if necessary.
- the support member has a resilient tongue which extends away from the protective member 57 and from above approximately along a peripheral portion of the grinding surface 41a down to approximately the upper, further end of the gap 75 and, for example, a little into the gap.
- the protective housing contains in the Figures 2 and 3 visible, at least generally vertical inner walls 81 and 83.
- the inner wall 81 is located between the motor housing 33 and the grinding wheel 41, extends generally transverse to the axis of rotation 39 and has a hole according to Fig. 2 consists of a one side edge of the inner wall ago cut slot and is penetrated by the motor shaft 35.
- the other inner wall 83 extends on one side of the motor housing and the grinding wheel along the axis of rotation 39.
- the two inner walls border the grinding wheel containing portion of the interior of the protective housing 3 almost dust-tight against the remaining areas of the protective housing interior and in particular against the motor housing containing area of the protective housing interior from.
- the area of the interior of the protective housing containing the grinding wheel can be connected via a suction connection 85 of the grinding machine to a suction device formed, for example, by a vacuum cleaner for sucking off the grinding dust produced during grinding.
- One of the walls of the protective housing 3, namely preferably its top wall 15, is provided with a slot-shaped opening 87, through which a portion of the polishing or lapping disc 45 protrudes from the protective housing.
- a part of the opening 87 penetrating portion of the polishing or lapping disc is covered by a covering wall 89 connected to the top wall.
- the grinding machine still has a power connection 91 for the power supply of the motor and a switch 93 for switching the motor 31 on and off.
- a knife 101 has a blade 103 with a cutting edge 103a and a handle 105. For grinding and sharpening of the blade 103, it is inserted with the cutting edge 103a downwards from above against the direction of rotation of the grinding surface in the gap 75, so that a portion of Cut the Blade at a grinding point of the defined by the rotating grinding surface cone surface abuts the grinding surface and is ground by this.
- the cutting edge of a currently ground portion of the blade 103a is approximately at the edge 67g of the stop 63 facing the abrasive surface.
- the resilient tongue of the support member 77 supports a portion of the blade located above the blade during grinding and prevents it from jamming 77 covered peripheral portion of the grinding surface is touched by the blade or with one hand.
- the resilient tongue can also press the blade against the stop surface and thereby contribute to the fact that the blade rests well against the stop surface during grinding and is guided.
- the knife and its blade are thereby displaced approximately along an approximately straight displacement line 107 over the grinding surface.
- the displacement line 107 for example, runs approximately parallel to a surface line located near the grinding point of the conical surface defined by the rotating grinding surface and is approximately horizontal.
- the displacement line 107 may, for example, be approximately parallel to or parallel to the edge 67g facing the abrasive surface, through the narrowest point of the gap 75 and lie in an approximately or exactly horizontal plane that is slightly above the axis of rotation.
- the displacement line forms with the axis of rotation an angle ⁇ which is at least approximately and possibly exactly the same size as the angle ⁇ .
- the knife when moving along the displacement line 107 can also be pivoted a little bit around the grinding point up and down, so that the cutting edge abuts well at the grinding surface on the grinding surface.
- the translation line 107 is substantially - i. at least apart from its at the opening 51 of the protective housing 3 through the gap 75 extending portion - outside of the protective housing on this past.
- the displacement line 107 thus also extends, in particular outside the section of the protective housing containing the motor housing 33, beyond the section of the protective housing which is perpendicular to the axis of rotation 39 and past this section. Accordingly, the displacement line 107 extends beyond the motor housing 33 even past this.
- the displacement line also extends beyond the polishing or lapping disc 45 past this. This allows the blade of the knife to be moved over the grinding surface without obstructing the movement of the knife through the protective housing or the motor housing or the polishing or lapping disc.
- the blade of the knife is on the right side of the head 67 of the stopper 63.
- the blade can of course also be inserted into the gap 75 with the grip 105 to the left of the stop, so that both side surfaces of the blade's edge can be ground.
- the recess 41b carries the Grinding wheel in that the cutting edge 103a can be ground to approximately the handle.
- the abutment surface of the head 67 of the abutment 63 facing the grinding surface 41a forms an angle with a tangent to a circumferential section of the conical surface defined by the grinding surface. This angle is different, depending on which of the three abutment surfaces 67c, 67d, 67e faces the abrasive surface. By turning the head 67 so different angles between the stop surface and said tangent can be selected. The selected angle then determines the angle that form the two opposite side surfaces of the cutting edge after grinding together.
- the blade 103 After the blade 103 has been ground with the grinding wheel 41, it can still be polished or lapped with the polishing or lapping disk 45. Since this has a larger diameter than the grinding wheel 41 and protrudes beyond the flat main part of the top wall 15 of the protective housing 3, the blade can be moved during polishing or lapping approximately parallel to the rotation axis 39 on the cylindrical peripheral surface of the polishing or lapping without that this displacement is hindered by the grinding wheel or the motor or the protective housing or other parts of the grinding machine.
- the apparent grinding machine 201 has a protective housing 203, a motor 231 and a grinding wheel 241, but no polishing or lapping disc.
- the protective housing 203 may be in the axis of rotation parallel direction may be a little shorter than the protective housing 3 of the grinding machine 1.
- the grinding machine 201 is formed largely similar to the previously described grinding machine 1 except for the missing polishing or lapping disc and the somewhat shorter protective housing.
- the apparent grinding machine 301 has a motor 331 with a motor housing 333 and a base 335, which serves as a base for the whole grinding machine.
- the grinding machine 301 further has a grinding wheel 341 and a polishing or lapping disk 345, but no protective housing corresponding to the protective housing 3 of the grinding machine 1.
- the grinding machine 301 has two protective hoods 351 and 353 fastened to the motor housing, of which the protective hood 351 surrounds most of the grinding wheel 341 and the protective hood 353 encloses most of the polishing or lapping disk 345.
- the grinding machine 301 further has support means 361 with a stop 363 for supporting and possibly guiding a blade.
- the stopper 361 is attached to the guard 351 and has, for example, a head which has various abutment surfaces and can be fixed in different rotational positions on a serving as a holder part of the guard 351.
- the grinding machine 301 can be made substantially similar to the grinding machine 1.
- the grinding surface may be inclined only approximately conically and with respect to the axis of rotation of the grinding wheel be that their lying in axial sectional planes generatrices are slightly bent.
- the grinding surface and its generatrices should preferably be inclined outwards over the entire length in the direction of the motor housing away from the axis of rotation.
- the rotating during operation grinding surface then defines a fixed, the axis of rotation enclosing, coinciding with the grinding surface rotating surface with curved generatrices.
- the grinding surface may then possibly be formed so as to be parallel to the axis of rotation from a sectional plane parallel to, but for example, a horizontal, through which in FIG FIGS. 5 to 7 drawn displacement line 107 extending cutting plane is slightly offset from the axis of rotation is cut in straight lines.
Abstract
Description
Die Erfindung betrifft eine Schleifmaschine gemäss dem Oberbegriff des Anspruchs 1.The invention relates to a grinding machine according to the preamble of
Die Schleifmaschine ist insbesondere zum Schleifen und Schärfen der Klinge eines Messers vorgesehen, kann aber eventuell auch zum Schleifen der Klinge von andern Scneidwerkzeugen, wie etwa Beilen oder Scheren, oder Dolchen verwendet werden. Die Schleifmaschine kann zum Beispiel in Betrieben für die Verarbeitung von Nahrungsmitteln, etwa in Gastronomie-, Fleisch-, Fisch- und Gemüseverarbeitungsbetrieben zum Einsatz gelangen.The grinding machine is particularly intended for grinding and sharpening the blade of a knife, but may also be used to grind the blade from other cutting tools such as hatchets or scissors, or daggers. The grinding machine can be used, for example, in food processing plants, for example in catering, meat, fish and vegetable processing plants.
Auf dem Markt bekannte Schleifmaschinen zum Schleifen der Klinge von Messern weisen eine Schleifscheibe mit einer zylindrischen Schleiffläche auf, so dass die Klinge eines Messers beim Schleifen ungefähr parallel zur Drehachse der Schleifscheibe über die Schleiffläche verschoben werden kann. Diese Schleifmaschinen besitzen einen elektrischen Motor mit einem Motorgehäuse und einer Motorwelle sowie oft noch eine Polierscheibe und/oder ein Schutzgehäuse, das mindestens grosse Teile des Motors, der Schleifscheibe und der allfälligen Polierscheibe abdeckt. Die Schleifscheibe ist mit Lagern um eine Drehachse drehbar gelagert und durch ein Getriebe mit der Motorwelle verbunden. Die Drehachse der Schleifscheibe ist dabei derart gegen die Drehachse der Motorwelle versetzt, dass die Klinge beim Schleifen am Motorgehäuse sowie am allfälligen Schutzgehäuse und/oder an der allfälligen Polierscheibe vorbeigeschoben werden kann.Knife grinding knives known in the market have a grinding wheel with a cylindrical grinding surface so that the blade of a knife can be slid over the grinding surface approximately parallel to the axis of rotation of the grinding wheel. These grinders have an electric motor with a motor housing and a motor shaft and often a polishing pad and / or a protective housing that covers at least large parts of the engine, the grinding wheel and the possible polishing pad. The grinding wheel is rotatably mounted with bearings about an axis of rotation and connected by a gear to the motor shaft. The axis of rotation of the grinding wheel is offset in such a way against the axis of rotation of the motor shaft, that the blade during grinding on the motor housing and on any Protective housing and / or can be pushed past the possible polishing pad.
Die gegen die Drehachse der Motorwelle versetzte Anordnung der Drehachse der Schleifscheibe vergrössert den Platzbedarf einer solchen bekannten Schleifmaschine. Die zusätzlich zu den Lagern des Motors erforderlichen Lager zum Lagern der Schleifscheibe und das Getriebe zum Verbinden der Schleifscheibe mit der Motorwelle ergeben zudem eine beträchtliche Erhöhung der Herstellungskosten.The offset from the axis of rotation of the motor shaft arrangement of the axis of rotation of the grinding wheel increases the space requirement of such a known grinding machine. In addition, the bearing for supporting the grinding wheel and the gear for connecting the grinding wheel to the motor shaft, in addition to the bearings of the motor, result in a considerable increase in the manufacturing cost.
Mehr oder wenige ähnliche Schleifmaschinen sind auch aus den Dokumenten
Der Erfindung liegt die Aufgabe zugrunde, eine Schleifmaschine zu schaffen, die Nachteile der bekannten Schleifmaschinen vermeidet. Die Schleifmaschine soll insbesondere kompakt und kostengünstig herstellbar sein.The invention has for its object to provide a grinding machine which avoids the disadvantages of the known grinding machines. The grinding machine should in particular be compact and inexpensive to produce.
Diese Aufgabe wird gemäss der Erfindung durch eine Schleifmaschine mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Schleifmaschine gehen aus den abhängigen Ansprüchen hervor.This object is achieved according to the invention by a grinding machine with the features of
Die Schleifscheibe ist gemäss der Erfindung koaxial zur Motorwelle angeordnet und drehfest mit der Motorwelle verbunden. Dies ermöglicht eine kompakte Bauweise. Die Schleifscheibe kann durch die zum Motor gehörenden, im Motorgehäuse angeordneten, zum Lagern der Motorwelle sowie des ganzen Rotors des Motors dienenden Lager gelagert werden, so dass keine zusätzlichen Lager zum Lagern der Schleifscheibe benötigt werden. Entsprechendes gilt für eine allenfalls vorhandene Polierscheibe oder eventuell Läppscheibe. Im Übrigen ist natürlich auch kein Getriebe zwischen der Motorwelle und der Schleifscheibe und einer allfälligen Polier- oder Läppscheibe vorhanden. Die erfindungsgemässe Schleifmaschine ist daher auch wirtschaftlich herstellbar. Die bezüglich der Drehachse der Schleifscheibe geneigte, sich zum Motorgehäuse hin erweiternde, vorzugsweise ungefähr oder genau konische Schleiffläche ermöglicht, ein Messer oder anderes Werkzeug mit einer Klinge beim Schleifen auch dann ungefähr quer über die Schleiffläche und aussen am Motorgehäuse sowie einem allfälligen Schutzgehäuse und/oder einer allfälligen, ebenfalls zur Motorwelle koaxialen Polierscheibe oder eventuell Läppscheibe vorbeizubewegen, wenn der Durchmesser der Schleifscheibe relativ klein ist.The grinding wheel is arranged according to the invention coaxial with the motor shaft and rotatably connected to the motor shaft. This allows a compact design. The The grinding wheel can be supported by the bearings belonging to the motor, arranged in the motor housing, for supporting the motor shaft as well as the whole rotor of the motor, so that no additional bearings are required for supporting the grinding wheel. The same applies to any existing polishing pad or possibly lapping disc. Incidentally, of course, no transmission between the motor shaft and the grinding wheel and a possible polishing or lapping disc available. The inventive grinding machine is therefore also economical to produce. The inclined with respect to the axis of rotation of the grinding wheel, widening towards the motor housing, preferably approximately or exactly conical grinding surface allows a knife or other tool with a blade during grinding then approximately across the grinding surface and outside of the motor housing and a possible protective housing and / or a possible, also coaxial with the motor shaft polishing pad or possibly lapping disk move past, if the diameter of the grinding wheel is relatively small.
Hierzu sei ergänzend angemerkt, dass Schleifscheiben aus Festigkeits- und Sicherheitsgründen höchstens mit einer maximal zulässigen Umfangsgeschwindigkeit gedreht werden dürfen, so dass der Durchmesser einer Schleifscheibe bei einer vorgegebenen Drehzahl der Schleifscheibe einen bestimmten Maximalwert nicht überschreiten darf. Die Erfindung ermöglicht nun auch, den Durchmesser der Schleifscheibe ohne Beeinträchtigung der Verschiebbarkeit der Klinge so klein zu bemessen, dass die Schleifscheibe ohne Beschädigungsgefahr direkt mit der Drehzahl des Motors gedreht werden darf.For this purpose, it should additionally be noted that, for strength and safety reasons, grinding wheels may be rotated at most with a maximum permissible peripheral speed, so that the diameter of a grinding wheel may not exceed a specific maximum value for a given rotational speed of the grinding wheel. The invention also makes it possible to dimension the diameter of the grinding wheel without affecting the displaceability of the blade so small that the grinding wheel may be rotated without risk of damage directly to the speed of the motor.
Die Schleifscheibe kann daher zum Beispiel ohne Weiteres derart bemessen werden, dass sie direkt mit der Drehzahl von einem elektrischen Einphasen-Asynchronmotor oder eventuell einem Drehstrom-Asynchronmotor gedreht werden kann. Die Drehzahl der Schleifscheibe kann dann bei der Speisung des Motors mit Wechsel- oder Drehstrom mit einer Frequenz von 50 Hz vorzugsweise mindestens 2500 Umdrehungen pro Minute, vorzugsweise höchstens 3000 Umdrehungen pro Minute und zum Beispiel etwa 2700 bis 2950 Umdrehungen pro Minute betragen.The grinding wheel can therefore be readily dimensioned, for example, so that it can be rotated directly with the speed of a single-phase electric asynchronous motor or possibly a three-phase asynchronous motor. The speed of the grinding wheel may then be at least 2500 revolutions per minute, preferably at most 3000 revolutions per minute and for example about 2700 to 2950 revolutions per minute when feeding the motor with alternating or three-phase current with a frequency of 50 Hz.
Der Erfindungsgegenstand und weitere Vorteile von diesem werden nun anhand in den Zeichnungen dargestellter Ausführungsbeispiele erläutert. In den Zeichnungen zeigt:
-
Fig. 1 eine Schrägansicht einer Schleifmaschine, -
Fig. 2 eine Explosionsdarstellung der Schleifmaschine, -
Fig. 3 eine Schrägansicht der Schleifmaschine mit entfernter Schutzhaube, -
Fig. 4 einen Ausschnitt ausFig. 1 in grösserem Massstab, -
Fig. 5 eine Frontansicht der Schleifmaschine beim Schleifen eines Messers, -
Fig. 6 eine Seitenansicht der Schleifmaschine beim Schleifen eines Messers, -
Fig. 7 eine Draufsicht auf die Schleifmaschine beim Schleifen eines Messers, -
Fig. 8 eine Schrägansicht des Halters des Anschlags der Schleifmaschine, -
Fig. 9 eine Schrägansicht des Kopfs des Anschlags, -
Fig. 10 einen Schnitt durch den Kopf entlang der Linie 10-10 inFig. 9 , -
Fig. 11 einen Schnitt durch den Kopf entlang der Linie 11-11 inFig. 9 , -
Fig. 12 eine Schrägansicht einer andern Schleifmaschine ohne Polierscheibe, -
Fig. 13 eine Schrägansicht der inFig. 12 ersichtlichen Schleifmaschine, aber mit entfernter Schutzhaube und -
Fig. 14 eine Schrägansicht von noch einer andern Schleifmaschine ohne ein den Motor umschliessendes Schutzgehäuse.
-
Fig. 1 an oblique view of a grinding machine, -
Fig. 2 an exploded view of the grinding machine, -
Fig. 3 an oblique view of the grinding machine with protective hood removed, -
Fig. 4 a section fromFig. 1 on a larger scale, -
Fig. 5 a front view of the grinding machine when grinding a knife, -
Fig. 6 a side view of the grinding machine when grinding a knife, -
Fig. 7 a top view of the grinding machine when grinding a knife, -
Fig. 8 an oblique view of the holder of the stop of the grinding machine, -
Fig. 9 an oblique view of the head of the stroke, -
Fig. 10 a section through the head along the line 10-10 inFig. 9 . -
Fig. 11 a section through the head along the line 11-11 inFig. 9 . -
Fig. 12 an oblique view of another grinding machine without polishing pad, -
Fig. 13 an oblique view of inFig. 12 apparent grinder, but with the protective hood and removed -
Fig. 14 an oblique view of yet another grinding machine without a protective housing enclosing the motor.
Die in den
Die Schleifmaschine 1 weist einen im Schutzgehäuse 3 angeordneten elektrischen Motor 31 auf, der mindestens zu einem grossen Teil und beispielsweise im Wesentlichen - d.h. abgesehen von einigen Kühllöchern und sonstigen Löchern - vollständig vom Schutzgehäuse umschlossen ist. Der Motor 31 hat ein Motorgehäuse 33 mit einem im Allgemeinen zylindrischen, beispielsweise mit Kühlrippen versehenen Mantel und einen Rotor mit einer mit Lagern drehbar im Motorgehäuse gelagerten Motorwelle 35. Das Motorgehäuse 33 ist mit Befestigungsmitteln 37 lösbar und beispielsweise schwingungsdämpfend am Boden 5 befestigt. Der Motor 31 ist beispielsweise als Einphasen-Asynchronmotor ausgebildet, könnte jedoch auch aus einem Drehstrom-Asynchronmotor bestehen.The
Die Motorwelle 35 ist um eine ungefähr oder genau horizontale, zur Seitenwand 17 sowie zum Seitenwandteil 21 parallele Drehachse 39 drehbar und hat am sich näher beim Seitenwandteil 23 und links in den
Eine Polierscheibe 45 oder Läppscheibe 45 ist mit beispielsweise eine Schraube aufweisenden Befestigungsmitteln 47 lösbar, aber starr und drehfest an demjenigen Endabschnitt der Motorwelle 35 befestigt, der bei dem der Schleifscheibe 41 abgewandten Ende des Motorgehäuses 31 aus diesem herausragt. Die Polier- oder Läppscheibe 45 hat eine beispielsweise ungefähr zylindrische, zum Polieren bzw. Läppen dienende Umfangsfläche, deren Durchmesser grösser ist als die Durchmesser des Mantels des Motorgehäuses und der Schleifscheibe. Die Polier- oder Läppscheibe weist beispielsweise miteinander verbundene Schichten aus textilem Stoff, Filz, Leder oder dergleichen auf.A
Die Schleifscheibe 41 und die Polier- oder Läppscheibe 45 sind gemäss der obigen Beschreibung also koaxial zur Motorwelle 35 und wie diese und der ganze Rotor des Motors 31 um die gemeinsame Drehachse 39 drehbar. Die zum Motor gehörenden, im Motorgehäuse 33 angeordneten, zum Lagern der Motorwelle 35 dienenden Lager dienen also gleichzeitig zum Lagern der Schleifscheibe und der Polier- oder Läppscheibe.The grinding
Die Schutzhaube 7 des Schutzgehäuses 3 hat bei den aneinanderstossenden Rändern der Frontwand 11 und des Seitenwandteils 23 eine zum Teil auch in
In der Nähe der Öffnung 51 sind Stützmittel 61 angeordnet, um die Klinge eines zu schleifenden Messers in noch näher beschriebener Weise beim Schleifen abzustützen und/oder zu führen. Die Stützmittel 61 weisen einen mehrteiligen Anschlag 63 mit einem Halter 65, einem Kopf 67 und einer Schraube 69 auf.Support means 61 are arranged in the vicinity of the
Der Halter 65 des Anschlags 63 ist separat in
Der separat in den
Die der Schleiffläche 41a zugewandte Anschlagfläche 67c oder 67d oder 67e des Anschlags 63 begrenzt zusammen mit dem ihr gegenüberstehenden Umfangsabschnitt der von der Schleiffläche definierten, feststehenden Drehfläche, d.h. Konusfläche, einen Spalt 75, der sich entlang dem genannten Umfangsabschnitt von oben nach unten zur Kante 67g hin verengt. Die sich bei der Kante 67g befindende, engste Stelle des Spalts 75 wird möglichst schmal bemessen und ist zum Beispiel ungefähr 0,1 mm bis 0,5 mm breit.The
Die sich unterhalb der der Schleiffläche 41a zugewandten Anschlagfläche befindende Kante 67g liegt vorzugsweise ungefähr in der Höhe der Drehachse 39 der Motorwelle sowie der Schleifscheibe und/oder zum Beispiel ein wenig oberhalb der Drehachse. Der Anschlag ist zudem derart angeordnet, dass die Kante 67g ungefähr oder genau horizontal und mindestens annähernd oder genau parallel zu einer sich in ihrer Nähe befindenden Mantellinie der Konus-oder Kegelfläche verläuft, die von der beim Betrieb rotierenden, konischen Schleiffläche 41a definiert wird. Die Kante kann zum Beispiel ein wenig oberhalb einer durch die Drehachse 39 verlaufenden Horizontalebene liegen, genau horizontal und ungefähr oder genau parallel zu derjenigen Mantellinie der Konusfläche sein, die in der Nähe der Kante ein wenig unterhalb von dieser in der durch die Drehachse verlaufenden Horizontalebene liegt.The
Es sei angemerkt, dass die sich dann am nächsten bei der horizontalen Kante 67g befindende, gerade Mantellinie der Konusfläche nicht genau parallel zur horizontalen Kante 67g verläuft, sondern gegen eine Horizontalebene leicht zur Drehachse 39 und zur Spitze des von der Schleiffläche definierten Kegels hin nach unten geneigt ist. Im Übrigen könnte der Anschlag eventuell auch derart geändert werden, dass die Kante 67g etwas weiter unten in der durch die Drehachse 39 verlaufenden Horizontalebene liegt oder zwar oberhalb dieser Horizontalebene liegt, aber ein wenig derart gegen diese geneigt ist, dass sie ungefähr oder genau parallel zur sich am nächsten bei ihr befindenden Mantellinie der Konusfläche ist.It should be noted that the straight edge line of the conical surface which is closest to the
Die Stützmittel 61 weisen noch ein am deutlichsten in
Das Schutzgehäuse enthält in den
Eine der Wände des Schutzgehäuses 3, nämlich vorzugsweise dessen Deckwand 15, ist mit einer schlitzförmigen Öffnung 87 versehen, durch welche ein Abschnitt der Polier- oder Läppscheibe 45 aus dem Schutzgehäuse herausragt. Dabei wird ein Teil des die Öffnung 87 durchdringenden Abschnitts der Polier- oder Läppscheibe von einer mit der Deckwand verbundenen Abdeckhaube 89 abgedeckt.One of the walls of the
Die Schleifmaschine weist noch einen Stromanschluss 91 für die Stromversorgung des Motors und einen Schalter 93 zum Ein- und Ausschalten des Motors 31 auf.The grinding machine still has a
Nun wird anhand der
Damit die Klinge über ihre ganze Länge geschliffen werden kann, wird sie vom einen Rand zum andern Rand der Schleiffläche ungefähr quer über diese verschoben. Das Messer und dessen Klinge werden dabei ungefähr entlang einer ungefähr geraden Verschiebelinie 107 über die Schleiffläche verschoben. Die Verschiebelinie 107 verläuft beispielsweise ungefähr parallel zu einer sich in der Nähe der Schleifstelle befindenden Mantellinie der von der rotierenden Schleiffläche definierten Konusfläche und ist ungefähr horizontal. Die Verschiebelinie 107 kann zum Beispiel ungefähr oder genau parallel zu der der Schleiffläche zugewandten Kante 67g durch die engste Stelle des Spalts 75 verlaufen und in einer ungefähr oder genau horizontalen Ebene liegen die sich ein wenig oberhalb der Drehachse befindet. Die Verschiebelinie bildet mit der Drehachse eine Winkel β, der mindestens ungefähr und eventuell genau gleich gross ist wie der Winkel α. Wenn die Schneide der Klinge in einer Seitenansicht etwas gebogen ist, wie es in den
Die Verschiebelinie 107 verläuft im Wesentlichen - d.h. zumindest abgesehen von ihrem bei der Öffnung 51 des Schutzgehäuses 3 durch den Spalt 75 verlaufenden Abschnitt - ausserhalb des Schutzgehäuses an diesem vorbei. Die Verschiebelinie 107 verläuft also insbesondere auch ausserhalb des in zur Drehachse 39 senkrechten Blickrichtungen das Motorgehäuse 33 enthaltenden Abschnitts des Schutzgehäuses an diesem Abschnitt vorbei. Dementsprechend verläuft die Verschiebelinie 107 auch ausserhalb des Motorgehäuses 33 selbst an diesem vorbei. Des Weiteren verläuft die Verschiebelinie auch ausserhalb der Polier- oder Läppscheibe 45 an dieser vorbei. Dies ermöglicht, die Klinge des Messers über die Schleiffläche zu verschieben, ohne dass die Verschiebung des Messers durch das Schutzgehäuse oder das Motorgehäuse oder die Polier- oder Läppscheibe behindert wird.The
In den
Die der Schleiffläche 41a zugewandte Anschlagfläche des Kopfs 67 des Anschlags 63 bildet einen Winkel mit einer Tangente an einen der Anschlagfläche gegenüberstehenden Umfangsabschnitt der von der Schleiffläche definierten Konusfläche. Dieser Winkel ist verschieden, je nach dem, welche der drei Anschlagflächen 67c, 67d, 67e der Schleiffläche zugewandt ist. Durch Drehen des Kopfs 67 können also verschiedene Winkel zwischen der Anschlagfläche und der genannten Tangente gewählt werden. Der gewählte Winkel bestimmt dann den Winkel, den die beiden einander abgewandten Seitenflächen der Schneide nach dem Schleifen miteinander bilden.The abutment surface of the
Nachdem die Klinge 103 mit der Schleifscheibe 41 geschliffen wurde, kann sie noch mit der Polier- oder Läppscheibe 45 poliert bzw. geläppt werden. Da diese einen grösseren Durchmesser hat als die Schleifscheibe 41 und über den ebenen Hauptteil der Deckwand 15 aus dem Schutzgehäuse 3 herausragt, kann die Klinge beim Polieren bzw. Läppen ungefähr parallel zur Drehachse 39 über die zylindrische Umfangsfläche der Polier- oder Läppscheibe verschoben werden, ohne dass diese Verschiebung durch die Schleifscheibe oder den Motor oder das Schutzgehäuse oder andere Teile der Schleifmaschine behindert wird.After the
Die in den
Die in
Die erfindungsgemässe Schleifmaschine kann noch auf andere Weisen geändert werden. So kann die Schleiffläche eventuell statt genau konisch, nur ungefähr konisch und derart bezüglich der Drehachse der Schleifscheibe geneigt sein, dass ihre in axialen Schnittebenen liegenden Mantellinien leicht gebogen sind. Die Schleiffläche und ihre Mantellinien sollen dabei vorzugsweise über ihre ganze Länge in Richtung zum Motorgehäuse hin von der Drehachse weg nach aussen geneigt sein. Die beim Betrieb rotierende Schleiffläche definiert dann eine feststehende, die Drehachse umschliessende, mit der Schleiffläche zusammenfallende Drehfläche mit gebogenen Mantellinien. Die Schleiffläche kann dann eventuell derart ausgebildet sein, dass sie von einer Schnittebene, die zur Drehachse parallel, aber zum Beispiel wie eine horizontale, durch die in den
- 11
- Schleifmaschinegrinding machine
- 33
- Schutzgehäusehousing
- 55
- Bodenground
- 77
- Schutzhaubeguard
- 99
- FussFoot
- 1111
- Frontwandfront wall
- 1313
- Endwandend wall
- 1515
- Deckwandtop wall
- 1717
- SeitenwandSide wall
- 1919
- SeitenwandSide wall
- 2121
- SeitenwandteilSidewall portion
- 2323
- SeitenwandteilSidewall portion
- 3131
- Elektrischer MotorElectric engine
- 3333
- Motorgehäusemotor housing
- 3535
- Motorwellemotor shaft
- 3737
- Befestigungsmittelfastener
- 3939
- Drehachseaxis of rotation
- 4141
- Schleifscheibegrinding wheel
- 41a41a
- Konische SchleifflächeConical grinding surface
- 41b41b
- Ausnehmungrecess
- 4343
- Befestigungsmittelfastener
- 4545
- Polier- oder LäppscheibePolishing or lapping disc
- 4747
- Befestigungsmittelfastener
- 5151
- Öffnungopening
- 5353
- Lappencloth
- 5555
- Kanalchannel
- 5757
- Schutzelementprotection element
- 6161
- Stützmittelproppant
- 6363
- Anschlagattack
- 6565
- Halterholder
- 65a65a
- Ausnehmungrecess
- 65b65b
- Gewindebohrungthreaded hole
- 6767
- Kopfhead
- 67a67a
- Lochhole
- 67b67b
- Endabschnittend
- 67c67c
- Anschlagflächestop surface
- 67d67d
- Anschlagflächestop surface
- 67e67e
- Anschlagflächestop surface
- 67f67f
- Flächearea
- 67g67g
- Kanteedge
- 6969
- Schraubescrew
- 7171
- Lochachsehole axis
- 7575
- Spaltgap
- 7777
- Stützelementsupport element
- 8181
- Innenwandinner wall
- 8383
- Innenwandinner wall
- 8585
- Sauganschlusssuction
- 8787
- Öffnungopening
- 8989
- Abdeckhaubecover
- 9191
- Stromanschlusspower connection
- 9393
- Schalterswitch
- 101101
- Messerknife
- 103103
- Klingeblade
- 103a103a
- Schneidecutting edge
- 105105
- GriffHandle
- 107107
- Verschiebeliniedisplacement line
- 201201
- Schleifmaschinegrinding machine
- 203203
- Schutzgehäusehousing
- 231231
- Motorengine
- 241241
- Schleifscheibegrinding wheel
- 301301
- Schleifmaschinegrinding machine
- 331331
- Motorengine
- 333333
- Motorgehäusemotor housing
- 335335
- Sockelbase
- 341341
- Schleifscheibegrinding wheel
- 345345
- Polier- oder LäppscheibePolishing or lapping disc
- 351351
- Schutzhaubeguard
- 353353
- Schutzhaubeguard
- 361361
- Stützmittelproppant
- 363363
- Anschlagattack
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01783/09A CH702291A2 (en) | 2009-11-19 | 2009-11-19 | Grinder. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2324953A2 true EP2324953A2 (en) | 2011-05-25 |
EP2324953A3 EP2324953A3 (en) | 2015-06-03 |
EP2324953B1 EP2324953B1 (en) | 2018-03-21 |
Family
ID=43798928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10190799.6A Active EP2324953B1 (en) | 2009-11-19 | 2010-11-11 | Grinding machine |
Country Status (2)
Country | Link |
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EP (1) | EP2324953B1 (en) |
CH (1) | CH702291A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3718690A1 (en) * | 2019-04-05 | 2020-10-07 | Tormek AB | An arrangement for grinding edged tools |
US11517998B2 (en) | 2019-04-05 | 2022-12-06 | Tormek Ab | Grinding jig for a blade tool |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2611559A3 (en) | 1987-03-05 | 1988-09-09 | Arcor Sarl | Method for sharpening knives, scissors and other cutting tools using dry grinding wheels |
EP2030728A1 (en) | 2007-08-28 | 2009-03-04 | Hans-Peter Zahnd | Grinding device and grinding machine with such a device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2638720A (en) * | 1951-01-02 | 1953-05-19 | Leo A Hoek | Cutlery sharpener |
DE2140596A1 (en) * | 1971-08-13 | 1973-03-15 | Fritz Knecht | HOLDING AND GUIDING DEVICE FOR A GRINDING DEVICE |
-
2009
- 2009-11-19 CH CH01783/09A patent/CH702291A2/en not_active Application Discontinuation
-
2010
- 2010-11-11 EP EP10190799.6A patent/EP2324953B1/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2611559A3 (en) | 1987-03-05 | 1988-09-09 | Arcor Sarl | Method for sharpening knives, scissors and other cutting tools using dry grinding wheels |
EP2030728A1 (en) | 2007-08-28 | 2009-03-04 | Hans-Peter Zahnd | Grinding device and grinding machine with such a device |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3718690A1 (en) * | 2019-04-05 | 2020-10-07 | Tormek AB | An arrangement for grinding edged tools |
US11517998B2 (en) | 2019-04-05 | 2022-12-06 | Tormek Ab | Grinding jig for a blade tool |
US11628536B2 (en) | 2019-04-05 | 2023-04-18 | Tormek Ab | Arrangement for grinding edged tools |
EP4265373A1 (en) * | 2019-04-05 | 2023-10-25 | Tormek AB | An arrangement for grinding edged tools |
US11833639B2 (en) | 2019-04-05 | 2023-12-05 | Tormek Ab | Arrangement for grinding edged tools |
Also Published As
Publication number | Publication date |
---|---|
EP2324953B1 (en) | 2018-03-21 |
EP2324953A3 (en) | 2015-06-03 |
CH702291A2 (en) | 2011-05-31 |
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