DE102009050594A1 - Motor driven and combined grinding-, sharpening- and truing device has rotating or freely running stop angle that is provided for cutter - Google Patents

Abstract

The motor driven and combined grinding-, sharpening- and truing device has a rotating or freely running stop angle that is provided for a cutter. Two grinding body support disks confront in a functional unit of a centrally arranged angle guide plate in axial direction from both sides such that a crack-like opening develops in an angle, in which a kitchen, cooking or butcher knife is guided in the opening for grinding or sharpening.

Description

An electric motor driven grinding and removal system for knives in general, consists of two carrier discs, which are equipped on one side with moldings as abrasive. Centrally in between sits a mitrotierende or alternatively fixable angle guide disc. She runs on ball bearings.

The grinding wheels of the carrier disks are each facing the angle guide disk in this composite.

The working surface of the grinding wheel inserts is inclined to the drive axis by a few degrees. The angle guide disc has flanks on both sides, which are mirror images of the same acute angle to the drive axle. Together, the flanks of angle guide disc and grinding bodies each give a wedge-shaped guide gap, which corresponds to the trainees cutting angle of a knife. The knife edge angle can also be predetermined on one side of the angle guide plate.

Guided alternately in two guide gaps, a knife experiences a complete bevel.

The angle guide disc can be equipped on its circumference with several different angles. Thus, the respectively desired Anschleifwinkel be selected and set.

The windscreen compound runs in a cooling and cleaning fluid. Brush arrangements prevent splattering.

State of the art

• a) Abziehsteine, die mit Geschick und Gefühl von Hand auf bzw. nahe der Messerschneide zu führen sind. Es wird oft Wasser oder Öl zugegeben. (Bringt ein befriedigendes Ergebnis, erfordert aber Übung, viel Zeit und Erfahrung.)
• b) Fein geriffelte Formstähle, an denen eine stumpfe Schneide mehrmals mit geschickter Hand nachgeschärft – abgezogen – werden kann. Sie benötigt öfters einen Grundschliff, bei dem der allgemeine Schneidenwinkel wieder hergestellt werden muss. (Eine gute Schneide ist abhängig vom vorangegangenen, allgemeinen und sich wiederholenden Anschliff sowie dem Formschliff des Messerkörpers und ist Hauptgrund für einen raschen Verbrauch des Messers.)
• c) Rotierende Filz- oder Schwabbelscheiben. Schleifpaste wird bei jedem Vorgang zugegeben. Bereits nach wenigen Scharfvorgängen erfährt das Messer nahe und direkt an der Schneide Verformungen, die wieder herausgeschliffen werden müssen. (Ergibt, bei sachgemäßem, geübtem Einsatz, eine gute Schneide, die allerdings für den Metzger weniger geeignet ist. Zudem entstehen unerwünschte Verunreinigungen.)

For sharpening / stripping of butcher and / or kitchen knives, there are commercially available different systems, all of which have significant disadvantages.

• a) Whetstones that are to be guided with skill and feeling by hand on or near the knife edge. Water or oil is often added. (Brings a satisfying result, but requires practice, a lot of time and experience.)
• b) Finely corrugated forming steels, on which a blunt cutting edge can be sharpened several times with a skilled hand - pulled off - can be. It often requires a ground grinding, in which the general cutting angle must be restored. (A good cutting edge depends on the previous, general and repetitive sharpening as well as the shape of the knife body and is the main reason for a quick consumption of the knife.)
• c) Rotating felt or buffing wheels. Abrasive paste is added every time. After only a few sharpening operations, the knife experiences deformations close to and directly at the cutting edge, which have to be removed again. (If used properly, will give a good edge, but less suitable for the butcher, as well as causing unwanted contamination.)

• a) langsam rotierende Sandsteine im Wasserbad benutzt, (Unökonomisch, sehr langsam, kein gleichmäßiger Formschliff, hoher, ungleichmäßiger Verschleiß am Schleifkörper und Messer.)
• b) hochtourig rotierende, mineralische Schleifsteine, kunstharz- oder keramikgebunden, alternativ Schleifbänder, eingesetzt, (kein gleichmäßiger Formschliff, öfteres Zwischenkühlen erforderlich, Gefahr des Ausglühens bzw. der Überhitzung)
• c) von Hand Natur- oder Kunststeine bewegt. (Unökonomisch, sehr zeitaufwendig, nur erfahrene Schleifer erzielen ein befriedigendes Ergebnis)

For grinding

• a) slowly rotating sandstones used in the water bath, (Uneconomical, very slow, no uniform shape grinding, high, uneven wear on the grinding wheel and knife.)
• b) high speed rotating, mineral grinding stones, resin or ceramic bonded, alternatively abrasive belts, used, (no uniform shape grinding, frequent intermediate cooling required, risk of annealing or overheating)
• c) moved by hand natural or artificial stones. (Uneconomical, very time consuming, only experienced grinders achieve a satisfactory result)

In another system, a knife edge is pulled over two staggered carbide discs.

Derived from this, different commercial systems and devices are still commercially available, but all of them are more or less derived from the previously described ones. They also have their disadvantages.

Any dry, uncooled friction between an abrasive and hardened steel will produce temperature that will quickly deteriorate or even completely nullify the steel properties if not adjusted. It then enters a discoloration, which is popularly referred to as annealing.

This effect can occur with rotating abrasives at any speed. However, the faster the speed, the faster the overheating.

So z. B. conventional grinding methods the interim cooling a grinding piece - drills, chisels, chisel, chisel, etc.

Industrial grinding operations are permanently cooled.

The goal

The invention sets itself the goal that both the grinding of a knife, z. B. resharpening after a cutting breakout or a notch, as well as sharpening or re-sharpening, for any non-specialist, man or woman, without any problems, without danger of accidents, without risk of overheating, simple, fast, without appropriate training or education, is feasible.

Sharpening or re-sharpening should only take seconds.

The cutting angle should be created or maintained without errors.

The result should always, without exception, be perfect.

The system should be ready to use immediately by pressing a button.

The housewife or the butcher should not need an exercise or an apprenticeship.

It must not lead to overheating and deterioration of the steel quality.

The system should be affordable in price and in the business the operating costs at best be insignificant.

A knife should lose only a minimum of material due to individual grinding and sharpening processes.

A knife should not lose steel quality due to grinding and sharpening processes.

The abrasives should clean themselves permanently and automatically during and after each grinding or sharpening process.

The description of the novelty and the way it works

(1) in the two carrier discs

(1) in the two carrier discs, each distributed on a side surface, grinding inserts or sharpening inserts are embedded and fixed. 1 to 1c , The working surface of these grinding wheels is not perpendicular to the drive axis, but is inclined to the vertical by a few degrees. This inclination corresponds to half the cutting angle of a knife. 2 ,

The two discs sit on the drive axle and have between them a co-rotating or free-running, meaningful trained angle guide disc. The three discs together form the knife sharpener. It is powered by an electric motor.

The direction of rotation is backwards, away from the body.

(2) The angle guide disc

(2) The angle guide disc is designed as a free-running stop angle so that it stabilizes the knife in the correct position during the grinding process. It is mounted between the two carrier discs on ball bearings to ensure their free movement and without any restrictions on their functions.

Analogous to the carrier discs, the angle guide disc has chamfered flanks, which, however, here are mirror-inverted on both sides of the disc. The flanks are inclined at the same angle as the oblique working surface of the grinding wheels opposite them. Together they form a V-shaped guide gap, which corresponds to the cutting angle of the knife to be ground. In the gap, the knife is automatically held and guided in the optimal position for the grinding process.

The ball-bearing, free-running arrangement of the angle guide disc ensures that the disc can stand still under the contact pressure of the knife during the grinding process. Another possibility is to lock the angle guide disc by means of a device. 10 and 11 ,

(3) The angle guide disc with variable angle adjustment

In order to sharpen different knives with different cutting angles with a single angle guide disc - and thus a sharpening unit - the angle guide disc can be designed so that it can be adjusted for different cutting edge angles. For this purpose, the angle guide plate is divided into several areas, which are similar, as in pie pieces from the edge to the central axis. Thus, the angle guide disk is divided into two, four, six or eight sectors. 10 and 11 , Each of these different sections - "Pie Pieces" - has a different slope angle of the flank. Together with the fixed angle of inclination of the abrasive-carrier plates, different sized V-shaped gaps result in each area, which can be adjusted according to the desired cutting angle. The corresponding area of the angle guide disk can be easily held in position with a lock, for example a spring pin. 10 and 11 ,

(4) Construction of the sander

The two abrasive carrier discs are mounted directly on the shaft of the drive motor. They are designed with a collar that they touch in the mounted state in the area around the drive shaft, collar to collar. A ball bearing is attached to each collar. On this runs the angle guide disc. 6 to 8th

This ensures the free, low-resistance running of the angle guide disc. If a knife edge is applied to the angle guide disc, its rotation can be braked to a standstill and the stop behaves like a safe, fixed angle guide. The back pressure of the associated grinding wheel also contributes to this stabilization.

If a fixed angle guide desired, it is also possible to lock the angle guide disc with a spring pin in the given technique. 11 and 12 ,

(5) The stakes

The grinding, sharpening or Abziehheinsätze on the carrier disc differ in their grain size, bond and shape.

Coarser grits consistently cause a grinding effect, they wear steel in coarse form.

Medium grains with a loose bond cause a fine finish.

Fine grain results in a process that is comparable to traditional peeling, thus causing very fine grinding operations.

Each device has on both carrier discs the same in their grain size and effect grinding, sharpening or Abziehheinsätze.

For a sharpening process, the sharpening inserts can also consist of hardened and finely corrugated steel parts. They are then similar in surface finish to the peel-off "steels" previously used by butchers for sharpening.

Diamond-studded work surfaces can also be used successfully.

(6) Arrangement of grinding inserts.

The grinding, sharpening or removal inserts are arranged so that during the rotation of the sharpening insert, they make a circular movement on the knife edge. It is quite in keeping with the movement when pulling or sharpening stones are moved by hand in a traditional way on a knife edge. 1 to 1c ,

(7) The grinding or sharpening process

The entire knife edge is ground or "pulled off" simultaneously with the cutting edge. 2 and 6 ,

To form the cutting edge not only a relatively narrow strip is machined along this sharpening process, but the entire blade width, from the back to the cutting edge itself, is detected. The cutting angle is thus always uniform, formed over a large area and is not broken to the cutting itself, as usual when removing by hand. This results in a more uniform and better cutting edge. 2 and 6 ,

The grinding inserts are not constant during the grinding process and in contact with the entire knife side surface. This is only the case directly opposite the angle guide, ie at the point where the knife is always guided safely and rests against the guide at least with a large part of the knife side surface.

(8) Freewheel of the cutting edge.

The angle guide disc is designed so that the cutting edge itself or the sharpening inserts are not obstructed by them or come into contact at any point. The cutting edge is guided and processed completely free-standing in the guide gap without hindrance or technical restrictions. 6 ,

The angle guide disc guides the knife in its position over its entire width until just before the cutting edge. This is available in a very short area.

Here, in the area of action of the grinding inserts and in the immediate area of the knife edge, the angled guide disk has an indentation or recess. As a result, the cutting edge can be processed unhindered, completely freestanding and yet absolutely stable, with correct form and angle, ie ground, sharpened or removed. 6 and 8th ,

(9) hand guidance

On both sides, between the centrally arranged angle guide disc and an abrasive carrier there is a guide gap. 2 and 6 In it the grinder guides the knife horizontally and pulls it repeatedly all the way through, in the direction of its own body.

In this process, one side of the knife is always ground / sharpened / withdrawn. The knife is alternately guided or moved in both columns in the same way. This sharpens the left and right flanks of the knife.

(10) The carrier disk

The abrasive wheel carrier disc is rounded on both sides on its edges. 6 , An introduction to the guide gap is thus facilitated and safer.

The abrasive wheel carrier disc can be made of termoplastic plastic, metal or even minerals.

As far as it is made of metal or plastic, its outer surface has no further function.

It can also be designed as a compact abrasive with the corresponding angled side grinding surface. In this case, the grinding or working surface can be structured.

(11) The arrangement of the abrasive bodies on the carrier.

The grinding inserts are selected according to the different requirements, selected in experiments successful arrangements.

The grinding inserts can have different shapes and sizes.

Starting from the central axis grinding inserts can also be arranged spirally up to the edge of the carrier disk. 1 to 1c ,

All grinding inserts have no sharp edges on their working side. They are either slightly rounded and slightly convex overall.

(12) The speed range of the device.

The Drehzalbereich the discs of the device is up to 3000 U / min.

(13) Direction of rotation of the device.

The grinder, sharpener and puller rotates away from the body as seen by a grinder. 4 ,

(14) The selective access of the grinding inserts

The grinding inserts are distributed on the carrier disc so that they access the steel on the knife edge, during one revolution, only at certain points and for a short moment, that is, remove steel.

But that also means that they theoretically over 90%? do not come into contact with the steel in one full turn. As a result, dangerous heating of the knife steel can only occur under extreme conditions.

(15) cooling and cleaning

The device described, with grinding wheels and angle guide disc is of course subject to the physical laws of friction and temperature.

It can therefore also be operated with liquid cooling. The device then constantly passes through a liquid located in a container below the disc assembly. 3 ,

• 1. Sie kühlt den Schleifvorgang und schützt damit den gehärteten Stahl.
• 2. Sie besitzt eine Schutzeigenschaft gegen Oxydation.
• 3. Sie besitzt Spül- bzw. Reinigungspotential zum konstanten Säubern der Schleifeinsätze und der direkten Schleifstellen.

This liquid has different properties:

• 1. It cools the grinding process and thus protects the hardened steel.
• 2. It has a protective property against oxidation.
• 3. It has rinsing or cleaning potential for constant cleaning of the grinding inserts and the direct grinding points.

Without special precautions, the liquid would be distributed by the centrifugal force in the environment.

(16) The retention system for the coolant.

After the emergence of the rotating disk composite from the cooling liquid, the cooling liquid still entrained on the disks is collected by one or more brush inserts and returned to the coolant container.

Due to the direction of rotation, the scraper system of the brush or brushes, before the grinding process, but as close as technically possible to the liquid level of the coolant tank.

The best and most effective composition of this scraper system will have to be determined according to the respective technical design of the grinding and sharpening system. 3 to 5 ,

(17) Dry grinding / sharpening.

If the grinding and sharpening device is operated without cooling and cleaning liquid, the abrasive grit inserts must be in certain Time intervals are cleaned separately. For this purpose, the device is taken apart, which causes small problems by the simple technique.

(18) The practical application

The device should be operated on an electric motor with bilateral shaft ends.

The biggest advantage is the combination of grinding and sharpening systems working on the same motor axis.

On one side, a grinding system works for the shaping or grinding of cutting damage. On the other end of the shaft should work the device equipped for fine grinding or peeling.

(19) Knife sizes

The larger a knife and the wider its design, the larger the diameter of the disk system should be, of course with a maximum limit.

Small kitchen knives or narrow kitchen or butcher knives, are better processed on a disc system with a smaller diameter. 1a ,

The larger the wheel diameter, the more abrasive wheels can be mounted on a carrier disk and the more efficient the grinding process becomes. Conversely, the capacity for grinding inserts on a small-sized carrier disc is limited, but quite suitable for use with smaller knives. In this case, a higher speed should be selected.

(20) Wedge shape on the cutting edge - the "breaking" of the cutting edge or the bevel of a bevel.

If an additional wedge shape near the cutting edge is desired, the knife is ground in a V-shaped guide gap whose angle is greater than the general cutting angle. If the knife is now guided along the angle guide disc as a support during the passage, a blunt, more wedge-shaped cutting edge is incorporated in the region of the cutting edge. 7 and 8th ,

A knife is always guided on the surface of the angle guide disc.

(21) Grinding inserts and carrier disc as a construction unit

Instead of inserting individual grinding wheels on a carrier disk, it is also possible to work with a compact grinding wheel of conventional design. It is then angled and structured accordingly on the work surface.

In a non-structured work surface, there are disadvantages, because the possibility of contamination by stuck steel particles is greatly increased. It would then have to be cleaned with a special device. On the one hand, the risk of changing the angle would be given and on the other hand, due to the abrasion, a broadening of the gap would result, with the result that the device would be unusable over time.

(22) The divided, lockable angle guide disc

If an angle guide disc is divided into several sectors with different angular arrangements, it is locked by means of a pin in the selected position. For this purpose, a simple spring pin can be sufficient and secure, which engages in the hole provided on the angle guide disc. 10 and 11 ,

The degree of angular position is clearly visible on the angle guide disc.

(23) Grinding wheel centers between angle guide discs.

As an alternative to the technique shown, the grinding wheel can also be arranged centrally. In this version, the angle guide plates or other angle guides are outside. Your angle guides are facing the grinding wheel.

(24) Coating the angle guide disc

In order to minimize the frictional resistance, and thus also to optimize the feel for the correct guidance of a tool, the abutment surfaces of the angle guide disc are coated with a material having a low coefficient of friction.

(25) Replace, clean the system

The grinder and puller can be completely disassembled to clean or replace components by loosening only one nut.

All parts can be put together quickly and easily, safely and securely.

In this simple way, the angle guide disc or even the sharpening discs can be replaced individually. 12

(26) An abrasive article carrier loaded with abrasives

(26) An abrasive body carrier equipped with abrasive bodies can also be at a 90 ° angle, ie with the working surface perpendicular to the drive axis. Only the angle guide disc (s) are the drive axle in the required grinding angle for the knife to be ground.

LIST OF REFERENCE NUMBERS

Fig. 1 Muster 1

Fig. 1a Muster 2

Schleifeinsätze auf einer Scheibe mit kleinem Durchmesser, für kleinere und kürzere Messer

Fig. 1b Muster 3

Fig. 1c Muster 4

Für größere Leistung auf der Flanke des Messers

Fig. 2Führungsspalt

A

Die eingesetzten Schleifkörper reichen bis an den Trägerrand.

B

Winkelanschlag linke Messerseite

C

Hier mitlaufende Messerführung und Winkelanschlag

D

Messerquerschnitt

E

Winkelanschlag rechte Messerseite

F

Schleifkörpereinsatz

Fig. 3Abstreifbürsten

G

Doppelte Anordnung der Flüssigkeitsabstreifbürsten.

Fig. 4Seitenansicht der Schleifvorrichtung mit Absorbtionsbürsten für Flüssigkeit vor dem Schleifkontakt

H

Drehrichtung

J

Position des Schleifers, Blickrichtung

Fig. 5Drehrichtung beim SchärfenFig. 6 – Die Winkelführungsscheibe rotiert nicht mit. Sie ist auf Kugellager montiert. Sie steht beim Führungsandruck des Messers still.

1

Messerquerschnitt veranschaulicht den durchgehenden Schneidenwinkel

2

Die Führungswinkel der Winkelführungsscheibe

3

Das in dem Spalt zwischen Winkelführung und Schleifeinsätzen geführte Messer.

4

Die Winkelführungsscheibe im Schnitt

5

Schleifeinsätze, leicht konvex und mit abgerundeten Kanten

6

Distanzscheibe neben der freilaufenden Winkelführungsscheibe

7

Antriebswelle

8

Befestigungsmuttern

9

Schleifkörperträger

10

Noch einmal die Winkelführungsscheibe mit genauerer Sicht auf die Winkelausbildung

11

Der Schneidenwinkel, gebildet zwischen den Schleifeinsätzen und dem Winkelanschlag auf der Winkelführungsscheibe, beide Spalten sind symmetrisch.

12

Unterlegscheibe

13

Die Gegenmutter

14

Die Kugellager

15

Aussparungen in der Winkelführungsscheibe mit dem Ziel der freien, unbehinderten Schneidenausbildung des Messers

16

Die Schleifkörperträger haben abgerundete Kanten

Fig. 7 – Der Anschlagwinkel ist stumpfer als die Anordnung der Schleifeinsätze

17

Angeschliffener Schneidenwinkel

18

Winkelstand der beiden Messerflanken zueinander

19

Der Winkel der Führungsscheibe ist größer als die Winkelanordnung der Schleifkörper

Fig. 8 – Der Anschlagwinkel ist stumpfer als die Anordnung der Schleifeinsätze

20

„Gebrochene Schneide”, angeschliffene Fase, der Schneidenwinkel wird verändert

21

Für die ausschließliche Ausbildung der Fase liegt der Messerschaft an der Winkelführungsscheibe an und wird dadurch von den Schleifeinsätzen nicht bearbeitet.

Fig. 9 – Rotierende Winkelführungsscheibe mit beidseitig gleichem Anschlagwinkel rundum auf der gesamten FlächeFig. 10 – Festsetzbare, vierfach unterteilte Winkelführungsscheibe – vier verschiedene Winkelanschläge

22

Bohrung für Arretierungsstift

Fig. 11

22

Bohrung für Arretierungsstift Die Winkelführungsscheibe ist in sechs Sektoren für unterschiedliche Führungswinkel unterteilt.

12 – Die Einzelteile (Wie bei 6.)

Fig. 1 to Fig. 1c Scheme for the shape and arrangement of the abrasive body

Fig. 1 pattern 1

Fig. 1a pattern 2

Grinding inserts on a disc with a small diameter, for smaller and shorter knives

Fig. 1b pattern 3

Fig. 1c pattern 4

For greater power on the flank of the knife

Fig. 2Führungsspalt

A

The abrasive particles used extend to the edge of the carrier.

B

Angle stop left side of knife

C

Here running knife guide and angle stop

D

Diameter section

e

Angle stop right side of the knife

F

Abrasive applications

Fig. 3Abstreifbürsten

G

Double arrangement of liquid wiping brushes.

Fig. 4 side view of the grinding device with Absorbtionsbürsten for liquid before the sliding contact

H

direction of rotation

J

Position of the grinder, viewing direction

Fig. 5Drehichtung when sharpening. 6 - The angle guide disc does not rotate. It is mounted on ball bearings. She stands still at the guide pressure of the knife.

1

Knife cross section illustrates the continuous cutting angle

2

The guide angles of the angle guide disc

3

The guided in the gap between angle guide and grinding inserts knife.

4

The angle guide disc in section

5

Grinding inserts, slightly convex and with rounded edges

6

Spacer next to the free-running angle guide disc

7

drive shaft

8th

fastening nuts

9

Grinding wheel carrier

10

Again, the angle guide disc with a closer view of the angle education

11

The cutting angle, formed between the grinding inserts and the angle stop on the angle guide disc, both columns are symmetrical.

12

washer

13

The mother-in-law

14

The ball bearings

15

Recesses in the angle guide disc with the aim of free, unobstructed cutting edge training of the knife

16

The abrasive carriers have rounded edges

Fig. 7 - The stop angle is blunter than the arrangement of grinding inserts

17

Ground edge angle

18

Angle of the two knife edges to each other

19

The angle of the guide disc is greater than the angular arrangement of the grinding wheels

Fig. 8 - The stop angle is blunter than the arrangement of grinding inserts

20

"Broken edge", beveled bevel, the cutting angle is changed

21

For the exclusive design of the chamfer of the knife shaft abuts the angle guide disc and is thus not processed by the grinding inserts.

Fig. 9 - Rotating angle guide disc with the same stop angle on both sides around the entire area. 10 - Lockable quadruple split angle guide disc - four different angle stops

22

Bore for locking pin

Fig. 11

22

Hole for locking pin The angle guide disk is divided into six sectors for different guide angles.

12 - The items (as with 6 .)

Claims (9)

The motor-driven, combined grinding, sharpening and removal device with rotating or freewheeling stop angle for knives is characterized in that in a functional unit of a centrally arranged angle guide disc in the axial direction two abrasive carrier plates face each other so that a gap-like opening in a premeditated angle, in for grinding / sharpening a kitchen, cooking or butcher's knife is performed. 2 The motor-driven, combined grinding, sharpening and pulling device is, according to claim 1, characterized in that the angle guide disc freewheeled on a sliding or ball bearings or can be locked in predetermined different angular positions. The motor-driven, combined grinding, sharpening and removal device is, according to claim 1, characterized in that incorporated in a grinding wheel carrier disc on the working level grinding, sharpening and / or Abziehformkörper, these working or contact surface in a flat Angle or can be perpendicular to the drive axle. The motor-driven, combined grinding, sharpening and removal device is, according to claim 1, characterized in that instead of an abrasive carrier plate this is replaced by a similarly shaped, homogeneous grinding, sharpening or Abziehkörper. The motor-driven, combined grinding, sharpening and removal device is, according to claim 2, characterized in that the angle guide disc has in its inner portion, below the guide surface, inwardly extending recesses or flutes, with the aim of grinding the cutting angle close the knife edge in any way to affect or hinder. 6 The motor-driven, combined grinding, sharpening and pulling device is, according to claim 1, characterized in that it passes through a cooling and cleaning liquid, which act by means of appropriately arranged brushes against splashing. The motor-driven, combined grinding, sharpening and removal device is, according to claim 2, characterized in that the angle guide disc is replaceable, with the aim of producing different cutting angle. The motor-driven, combined grinding, sharpening and removal device is, according to claim 2, characterized in that the grinding bodies opposite and fixable angle guide disc either on its entire stop surface has the same angular inclination or in different sectors selectable, divergent inclination angle to the drive axle has. The motor-driven, combined grinding, sharpening and removal device is, according to claim 2, characterized in that in the reverse arrangement, the grinding wheel are arranged centrally and the angle guide disks or differently shaped angle guides on both sides thereof.

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