EP3459699B1 - Couteau - Google Patents

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Publication number
EP3459699B1
EP3459699B1 EP18196630.0A EP18196630A EP3459699B1 EP 3459699 B1 EP3459699 B1 EP 3459699B1 EP 18196630 A EP18196630 A EP 18196630A EP 3459699 B1 EP3459699 B1 EP 3459699B1
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EP
European Patent Office
Prior art keywords
cutting
edge
blade
tilt angle
edges
Prior art date
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Application number
EP18196630.0A
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German (de)
English (en)
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EP3459699A1 (fr
Inventor
Philip Kahl
Andreas Runkel
Michael Knauf
Thorsten Schneider
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.)
Weber Food Technology GmbH
Original Assignee
Weber Maschinenbau GmbH Breidenbach
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Priority claimed from DE102017108841.5A external-priority patent/DE102017108841A1/de
Application filed by Weber Maschinenbau GmbH Breidenbach filed Critical Weber Maschinenbau GmbH Breidenbach
Publication of EP3459699A1 publication Critical patent/EP3459699A1/fr
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006Cutting members therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006Cutting members therefor
    • B26D2001/006Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00Machines or methods used for cutting special materials
    • B26D2210/02Machines or methods used for cutting special materials for cutting food products, e.g. food slicers

Definitions

  • the invention relates to a cutting knife, in particular a sickle knife or a spiral knife or a circular knife, for a device for slicing food products, in particular for a high-speed slicer that rotates about an axis of rotation during a cutting operation.
  • the knife has a radially outer circumferential edge which acts as a cutting edge and which has a curved profile around the axis of rotation.
  • the cutting knife has a plurality of cutting teeth which are arranged successively distributed along the circumferential edge, each cutting tooth having a cutting edge which comprises a cutting surface and a cutting edge delimiting the cutting surface radially on the outside.
  • Cutting knives with which food products such as, in particular, sausage, cheese and meat are cut into slices or pieces, are known in a wide variety of designs. Particularly in the field of high-speed slicers, with which high cutting speeds of several 100 to several 1,000 slices per minute are cut from a strand or loaf-shaped food product, a basic distinction is made between so-called circular knives on the one hand and so-called sickle or spiral knives (hereinafter simply "sickle knives”) ) on the other hand.
  • Circular knives have a cutting edge that runs circularly around the axis of rotation, whereby a circular knife not only rotates itself around the axis of rotation, but also revolves around an eccentric axis, i.e. parallel to the axis of rotation, around the cutting movement relative to the product required for the cutting of slices to create.
  • Sickle knives have a cutting edge that also has a curved course around the axis of rotation, but the radius of the cutting edge varies between a smallest radius and a largest radius in such a way that the cutting edge describes a sickle or spiral curve.
  • Sickle knives rotate exclusively around their axis of rotation, whereby here it is the course of the cutting edge deviating from a circular shape that ensures the necessary cutting movement relative to the product.
  • the intended direction of rotation of sickle knives is selected in such a way that the knife dips into the product at an initial circumferential area of the cutting edge which has a relatively small radius, which is also referred to as the immersion area, whereby the actual cutting movement for separating a slice or a piece from the product is thereby takes place that with further rotation of the knife the radius increases and consequently the cutting edge is moved through the product.
  • the immersion area which is also referred to as the immersion area
  • radius which is not used here for sickle knives in the strictly mathematical sense, for a section which perpendicularly cuts the axis of rotation of the knife, must be distinguished from the term "radius of curvature".
  • the radius of curvature is the radius of contact of the circle of curvature that best approximates the curve at that point.
  • the tangent of the curve at this point is perpendicular to the contact radius of this point.
  • the center of the circle of curvature does not lie, or at least not necessarily, on the axis of rotation of the knife.
  • the tangent perpendicular to the radius of curvature does not coincide at this point with the motion vector of this point when the knife is rotating. Since every point on the cutting edge rotates around the axis of rotation of the knife, the motion vector of every point is perpendicular to the relevant radius, but not to the relevant radius of curvature.
  • the term "radius” denotes a line perpendicular to the axis of rotation of the knife through this point and the term “motion tangent” or “motion vector” denotes a straight line through this point that is perpendicular to the radius.
  • the terms "radius of curvature” and “tangent” conform to the aforementioned convention. In the case of a circular knife, the radius and the radius of curvature as well as the movement tangent and the tangent are consequently identical in each case.
  • Cutting knives for slicing food products both circular knives and sickle knives, either with a non-toothed cutting edge or to provide them with a toothing.
  • Cutting knives with teeth are made for example EP 0 548 615 B1 and FR 2 661 634 A1 known.
  • the cutting angle in the circumferential direction of cutting knives with an toothless cutting edge is for example in DE 10 2007 040 350 A1 described in connection with a sickle knife.
  • a smaller cutting edge angle is selected in the immersion area in order to reduce product compression when the knife is immersed. Starting from the immersion area, the cutting edge angle can, for example, increase continuously so that the cutting edge angle is greatest towards the end of the cutting process. If the smaller cutting edge angle in the plunge area is referred to as "flat”, then the larger cutting edge angle can be referred to as "steep". With a relatively steep cutting edge angle, an advantageous depositing of the severed slices can be achieved, since the cutting edge can transmit an impulse directed out of the cutting plane to the respective severed disc. Therefore, the circumferential area of the knife edge which is effective towards the end of the cutting process and in which a steeper cutting edge angle is provided can also be referred to as the storage area.
  • the object of the invention is to create or to be able to produce a cutting knife of the type mentioned at the beginning, that is, in particular a circular knife or sickle or spiral knife, with which an improved cutting quality can be achieved.
  • a cutting knife of the type mentioned at the beginning that is, in particular a circular knife or sickle or spiral knife, with which an improved cutting quality can be achieved.
  • the same cutting quality as possible should be achieved over the entire cutting width of a slicing machine that can be used for products, also referred to as the cutting shaft width.
  • the invention can in principle be used both for sickle or spiral knives and for circular knives.
  • each cutting surface runs inclined with respect to a clamping plane perpendicular to the axis of rotation or a cutting plane and the inclination of the cutting surfaces varies along the peripheral edge.
  • the cutting plane is to be understood as a plane of the cutting knife which is clearly defined by the knife edge forming cutting edges of the cutting teeth can be defined. In a preferred embodiment of the invention, in which all or at least several cutting edges lie in a common plane, this plane is the cutting plane.
  • the invention consequently provides that not all cutting surfaces of the cutting teeth have the same inclination. Rather, it is provided that the cutting surfaces of the cutting teeth have different orientations in space, e.g. have with respect to the mounting level.
  • the clamping plane can coincide with the cutting plane defined by the cutting edge of the knife. However, this definition of the clamping level is not mandatory.
  • the clamping level can e.g. the plane defined by the back of a knife base body is also referred to.
  • the clamping plane is then spaced from the cutting plane ( Case 1) or the clamping plane coincides with the cutting plane (case 2).
  • the non-zero distance measured in the direction of the axis of rotation between the cutting plane and the plane defined by the rear of the knife base body is also referred to as the pitch.
  • the gauge is zero in case 2.
  • the actual position of the clamping plane is not decisive, rather it is only important that the clamping plane is perpendicular to the axis of rotation runs. Therefore, in the present disclosure, in part, in an alternative to the clamping plane, a “plane parallel to the clamping plane” is used.
  • the direction and extent of the inclination of the cutting surfaces can in principle be selected as a function of different criteria, in particular as a function of the properties of the food product to be sliced.
  • an adaptation to the positioning of the products to be sliced with respect to the cutting knife or the axis of rotation of the cutting knife can take place.
  • inclination In order to describe the inclination of a cutting surface geometrically, the inclination can be described as a superposition of a tilt and an adjustment.
  • An "inclined cutting surface” is to be understood here as meaning that the cutting surface - more or less pronounced, in particular depending on the size of the bevel angle of the cutting edge, see below - points in the intended direction of rotation of the knife.
  • the slope of a cutting surface can be defined using a single angle defined by the cutting surface with the cutting plane.
  • the cutting edge then forms the line of intersection between the cutting surface and the cutting plane.
  • this angle at which the cutting surface runs inclined to the cutting plane, will be referred to as the tilt angle KW.
  • This definition forms an independent third aspect of the invention (claim 2), for which protection is also claimed separately.
  • each cutting surface is inclined with respect to the cutting plane by the tilt angle KW and at the same time the cutting edge of each cutting surface has a lead angle, e.g. with respect to the movement tangent at a defined point of the cutting edge, for example the rear end point of the cutting edge.
  • Different inclinations of the cutting surfaces can therefore be achieved, for example, by varying the tilt angle while keeping the cutting angle constant, or vice versa. Alternatively, it is possible to vary both angles.
  • the inclination of a cutting surface that results in each case can be selected as a function of the circumferential position at which the relevant cutting tooth is located.
  • either only the tilt angle or only the lead angle can vary and the respective other angle can be constant, either zero or different from zero.
  • both angles can vary. Consequently, a large number of different angle combinations can be realized along the circumferential edge.
  • the inclined cutting edges of the cutting surfaces i.e. the cutting edges each having a bevel angle other than zero
  • the inclined cutting edges of the cutting surfaces can be referred to as a staggered or scale-like arrangement, which is characterized in particular by the fact that in each case between There is a transition between two successive cutting surfaces, which in principle can be designed as desired, but is preferably always characterized in that in the area of the transition the two immediately successive cutting surfaces are offset from one another with respect to the axis of rotation. In other words, there is a transition from a cutting surface There is a height offset or a jump to the cutting surface of a cutting tooth immediately following in the circumferential direction.
  • an uninterrupted, effective cutting edge located in the clamping plane or in a plane parallel to the clamping plane, which is formed cohesively by the cutting teeth and the transitions and here also is referred to as a continuous cutting edge.
  • one aspect of the invention (claim 5) relates to the orientation of the cutting edges, which can basically be described and defined independently of the size and orientation of the cutting surfaces and also regardless of whether the cutting surfaces are flat or curved.
  • At least some cutting edges or each cutting edge with a movement tangent includes a bevel angle, in particular one different from zero, the movement tangent and the radius intersecting at a point of the cutting edge in question, and / or that at least some Cutting edges are each oriented such that a front end of the cutting edge, seen in the intended direction of rotation, lies on a different, preferably a smaller, radius than the rear end of the cutting edge in question, and / or that at least some cutting edges or each cutting edge with a connecting line includes a bevel angle, in particular non-zero, the connecting line including the two rear ends or the two front ends of a respective cutting edge and the immediately preceding or connecting the following cutting edge.
  • the lead angle or the orientation of the cutting edges it can be determined - in principle individually for each cutting edge - how a respective cutting edge, e.g. is oriented in a fixed reference system, and thus under which orientation the relevant cutting edge cuts into the product to be cut. For a straight cutting edge lying in a defined plane, one point on the cutting edge is sufficient for a clear definition of its orientation.
  • another point of the cutting edge can also be selected, for example one of the two end points of the cutting edge.
  • the definition of the orientation of the cutting edge in relation to the movement tangent, i.e. to the movement vector, is in principle arbitrary, but it is useful insofar as the movement vector of a point on the cutting edge indicates the direction in which this point of the cutting edge is at the moment of cutting moved into the product relative to the product.
  • the absolute value of the angle between the cutting edge and the motion vector of a point on the cutting edge depends on which point on the cutting edge it is. If absolute values are given below for the lead angle, then these relate - as far as the lead angle is defined in relation to the motion vector, ie between the Movement vector and the cutting edge is measured - always on the point of the cutting edge in question at the rear in the direction of rotation.
  • a more "inclined position" of the cutting edges is preferably provided for a sickle knife, i. the front end is preferably on a radius that is smaller than the radius on which the front end would lie if the front end and the rear end were on an imaginary curve which corresponds to the cutting edge of a conventional toothless sickle knife.
  • the orientation of the cutting edges can alternatively also be defined in such a way that at least some cutting edges or each cutting edge with a connecting line includes a bevel angle, in particular non-zero, the connecting line including the two rear ends or the two front ends of a respective cutting edge and the direct connects preceding or following cutting edge with each other.
  • all rear ends of the cutting edges and / or all front ends of the cutting edges can each lie on an imaginary curve that is not a circle, which corresponds at least approximately to the cutting edge of a conventional, toothless sickle knife.
  • the connecting lines then together form a polygon that approximates this imaginary curve.
  • the cutting edges of the knife preferably have a "greater inclination" in that each cutting edge encloses an angle other than zero with its connecting path, which is also here as Lead angle should be designated.
  • the front end of each cutting edge consequently does not lie on a connecting path connecting the two immediately adjacent rear ends, but on a smaller radius.
  • the value ranges specified in this disclosure for the lead angle apply both to its definition with regard to the motion vector and to its definition with regard to the connecting path.
  • the specific value for the size of the cutting angle depends on its definition, but at least for the cutting knives used in practice on high-speed slicers for slicing food products, the difference is due to the short length of a cutting edge compared to the total length of the circumferential edge of the knife is small or negligible.
  • This exemplary embodiment is a sickle knife. Exceptionally good cutting results can also be achieved with a circular knife designed according to the invention, as tests carried out on different products, including cheese, have shown.
  • a bevel angle other than zero can be in a range from about 1 ° to 10 ° and preferably be about 3 ° to 6 °.
  • the lead angle can be in a range from about 10 ° to 20 °.
  • a preferred embodiment is characterized in that the lead angle is constant for all cutting surfaces.
  • the cutting surfaces are each set pointing in the intended direction of rotation.
  • the cutting surfaces are preferably each curved at least essentially planar or without edges.
  • planar cutting surfaces e.g. concave or convex curved cutting surfaces possible.
  • Such cutting surfaces can be produced, for example, by means of a so-called form milling cutter or by means of a grinding tool.
  • a reference can also be made at least approximately for such curved cutting surfaces, e.g. a reference plane or reference lines with radii of curvature can be defined in order to clearly define the inclination of the respective curved cutting surface with respect to the clamping plane or the cutting plane.
  • a further parameter of the toothing according to the invention is the orientation of the cutting edges of the cutting teeth.
  • at least some cutting edges or each cutting edge or that the projection of at least some cutting edges or each cutting edge into the clamping plane with a movement rod includes a bevel angle, in particular non-zero, with the movement rod and the radius, for example, in the rear Cut the end point of the cutting edge in question, and / or that at least some cutting edges or each cutting edge with a connecting path includes a bevel angle, in particular non-zero, the connecting path including the two rear ends or the two front ends of a respective cutting edge and the immediately preceding or following Cutting edge connects together.
  • the size of the cutting angle of one or each cutting edge is basically arbitrary and can be selected as a function of the properties of the food product to be cut.
  • the lead angle is a few degrees, especially not more than about 10 ° and e.g. in the range between 3 ° to 6 °, although larger chamfer angles are also possible in principle.
  • the cutting edges can each be oriented such that a front end of each cutting edge, viewed in the intended direction of rotation, lies on a different, in particular smaller, radius than the rear end of the relevant cutting edge - based on the axis of rotation of the knife.
  • the course of each cutting edge between its front end and its rear end can in principle be arbitrary, i.e. both a straight course and a course that is in principle arbitrarily curved are possible.
  • the cutting edges of two immediately successive cutting teeth are connected to one another by a transition edge, the transition edge being designed as a cutting edge.
  • the cutting edge of the cutting knife according to the invention therefore, not only the cutting edges of the cutting teeth or the cutting edges delimiting the cutting surfaces radially on the outside are effective, but also the transition edges, which connect two cutting edges of the cutting teeth that are immediately consecutive in the circumferential direction. Consequently, the cutting behavior of the cutting knife according to the invention can also be influenced by the shape or the course of a transition between two immediately successive cutting surfaces.
  • all cutting edges lie in a common plane, preferably in the clamping plane or in a plane parallel to the clamping plane, and / or that all cutting edges and all transition edges connecting two immediately consecutive cutting edges together form an uninterrupted cutting edge which in particular lies in the clamping plane or in a plane parallel to the clamping plane.
  • the cutting edges can also be in different planes.
  • the cutting edges each intersect the clamping plane or a plane parallel to the clamping plane.
  • an uninterrupted cutting edge formed jointly by all cutting edges and all transition edges connecting two immediately consecutive cutting edges intersects the clamping plane or a plane parallel to the clamping plane multiple times, coming alternately from one side and the other of this plane, wherein the sections of the cutting edge that intersect the plane are either only cutting edges, only transition edges, or both cutting edges and transition edges.
  • the effective as a cutting edge of the knife can be provided with a so-called clearance angle that is different from zero, which is below in connection with Figures 5a and 5b is explained in more detail. If the clearance angle is different from zero, the cutting edges and the transition edges do not lie in a common plane. However, a clearance angle of 0 ° is preferably provided, so that in a preferred embodiment all cutting edges and all transition edges lie in a common plane, namely in the clamping plane or in a plane parallel to the clamping plane.
  • the cutting surfaces each intersect the clamping plane radially on the outside, the cutting lines each cutting the cutting edge form, and cut radially on the inside of an inclined surface of the cutting knife which includes an angle with the clamping plane.
  • This angle between the inclined surface and the clamping plane is preferably smaller than the smallest tilt angle of the cutting surfaces, so that an imaginary radial extension of the inclined surface would intersect the clamping plane radially outside the cutting edges of the cutting surfaces.
  • the cutting edges and / or transition edges which each connect two immediately successive cutting edges, are each straight.
  • a straight line can also be defined for a curved cutting edge at least approximately, analogously to the motion tangent set out above, which enables a clear definition of the orientation of the cutting edge.
  • the cutting surfaces of two immediately successive cutting teeth are connected to one another by a transition surface, the transition surface in particular being designed as a recess that is set back with respect to the cutting surfaces.
  • the recess can be designed as a notch, channel, furrow or groove running in the radial direction.
  • the recess can form an undercut.
  • the radial extent of two immediately successive cutting teeth is at least essentially the same as the radial extent of the transition surface between the two cutting surfaces.
  • the cutting surfaces merge into the transition surface over their entire radial extent.
  • a transition edge can be present between the cutting surfaces and the transition surface.
  • These transition edges can each be a relatively sharp, non-rounded edge or a rounded edge with a comparatively small radius of curvature.
  • the transition edge can form a comparatively gentle transition and in particular be rounded with a comparatively large radius of curvature.
  • an undulating surface can be formed overall by the cutting surfaces and transition surfaces. It is also possible to design the two transition edges differently, so that the transition from one cutting surface to the transition surface is comparatively sharp-edged and the transition between the other cutting surface and the transition surface is relatively gentle.
  • the transition surface can be delimited radially on the outside by a transition edge connecting the two cutting edges of the two cutting teeth. As already mentioned above, this transition edge can itself be designed as a cutting edge.
  • the cross-sectional shape of the transition surface or its profile can in principle be designed as desired.
  • the transition surface can have any course between the two cutting surfaces.
  • the transition surface preferably has a curved profile, i. the cross-sectional shape or the profile of the transition surface is not straight.
  • the transition surface is preferably curved at least approximately in a U or V shape.
  • the profile of the transition surface is determined in particular by the tool used for production.
  • a cylindrical milling tool or a grinding tool with a longitudinal axis inclined with respect to the clamping plane is preferred used so that the transition surface defined by the recess intersects the clamping plane radially on the outside.
  • transition surface can then e.g. represent the shortest path between the two transition edges in the adjacent cutting surfaces.
  • the transition surface can, based on the size of the adjacent cutting surfaces, occupy a relevant part of the circumferential angle range.
  • the transition surface can extend over a circumferential angle range which is approximately 0.1 to 0.5 times the circumferential angle range of one of the cutting surfaces.
  • transitions between immediately successive cutting surfaces are preferably designed such that the two immediately successive cutting surfaces - viewed in the circumferential direction of the axis of rotation - do not overlap.
  • the cutting edges of two successive cutting teeth do not overlap and / or do not merge directly into one another.
  • the cutting edges preferably have a constant circumferential length and / or a constant edge length, i. all cutting edges preferably have the same circumferential length.
  • each cutting tooth has a circumferential length and / or a tooth length of approximately 3 mm to 7 mm, preferably approximately 5 mm.
  • circumferential length refers to the extent or extent of the cutting edges or cutting teeth measured in the circumferential direction, i.e. not the length of the cutting edge or the cutting tooth measured along the cutting edge. This length is referred to as edge length or tooth length in this disclosure.
  • the pitch of the cutting teeth is preferably constant and is in particular approximately between 3 mm and 6 mm, preferably approximately 5 mm.
  • the division of the cutting teeth is to be understood as the distance between two cutting teeth immediately following one another in the circumferential direction, measured between corresponding points of the two cutting teeth. With a division of, for example, 5 mm, the distance between the two front ends of the cutting edges of the two cutting teeth in the intended direction of rotation is 5 mm.
  • the pitch of the cutting teeth can vary in the circumferential direction, in particular with regard to the circumferential lengths of the Cutting teeth and / or in terms of the circumferential lengths of the transitions between the cutting teeth.
  • the toothing of the cutting knife is identical in each circumferential area, i.e. not all cutting teeth of the cutting knife are necessarily designed identically, although such a configuration is encompassed by the invention.
  • At least essentially the entire effective cutting edge is provided with a toothing which, however, is designed differently in individual circumferential areas.
  • the peripheral edge has at least one peripheral region of type I with a plurality of cutting teeth, the cutting surfaces of which have the same tilt angle.
  • the peripheral edge has at least one peripheral region of type II with a plurality of cutting teeth, the cutting surfaces of which have a varying tilt angle.
  • the peripheral edge has one or more peripheral areas of type I and additionally one or more peripheral areas of type II.
  • the tilt angle varies from one cutting tooth to an immediately adjacent cutting tooth, or that the tilt angle varies from a group of n> 1 consecutive Cutting teeth with mutually identical tilt angles to a directly adjacent group of m> 1 successive cutting teeth with mutually identical tilt angles varies.
  • the tilt angle can vary either from tooth to tooth or from tooth group to tooth group.
  • the circumferential edge between two circumferential areas of type I comprises a circumferential area of type II in which the value of the tilt angle varies from the tilt angle value of one circumferential area of type I to the tilt angle value of the other circumferential area of type I.
  • a preferred development can provide that the radius of curvature of the circumferential edge, viewed in the intended direction of rotation, decreases from a largest radius to a smallest radius, the value of the tilt angle of the circumferential area of type II seen in the direction of rotation decreases from a larger tilt angle value to a smaller tilt angle value, in particular in equally large angular steps from cutting tooth to cutting tooth.
  • a cutting edge course can be obtained that shows both optimal immersion behavior and optimal deposit behavior.
  • a cutting edge course can be reproduced, as is known, for example, from the prior art for sickle knives with toothless knife cutting edges and in which - as initially in connection with DE 10 2007 040 350 A1 mentioned - there is a comparatively flat cutting edge angle in an immersion area and a comparatively steep cutting edge angle is present in a storage area.
  • the tilt angle of the cutting surfaces of the cutting teeth can be selected to be comparatively small in a circumferential area of type I that forms the immersion area, whereas in a circumferential area of type I that forms the deposit area, the tilt angle of the cutting surfaces is selected to be relatively large.
  • the transition area between the immersion area and the deposit area is then formed by the circumferential area of type II, in which - seen from the immersion area - the tilt angle of the cutting surfaces increases from the lower value of the immersion area to the larger value in the deposit area, this increase steadily from the cutting tooth to cutting tooth or from cutting tooth group to cutting tooth group with a constant tilt angle in each case within a group, as has already been generally explained above.
  • the deposit area extends over a circumferential angle area approximately twice as large as the immersion area, the transition area between the immersion area and the deposit area extending over a circumferential angle area that is slightly more than is half of the circumferential angular range of the immersion area.
  • the larger tilt angle value of one circumferential area of type I can be in the range of 20 ° to 30 ° and preferably between 22 ° and 26 °, with the smaller tilt angle value of the other circumferential area of type I in the range of 15 ° to 22 ° and is preferably between 17 ° and 19 °, and each angle change in the type II circumferential region is in the range from 0.2 ° to 1 °, preferably in the range from 0.25 ° to 0.5 °.
  • the smaller tilt angle value is approximately 18 °
  • either the larger tilt angle value is approximately 26 ° and each angle change is approximately 0.5 °
  • the larger tilt angle value is approximately 22 ° and each angle change is approximately 0.25 °.
  • the inclination or the tilt angle of the cutting surfaces can either be constant over the entire peripheral edge or vary along the peripheral edge.
  • several circumferential areas can be provided, of which at least two circumferential areas differ in terms of the value of the constant tilt angle within the respective circumferential area or in terms of the change behavior of the tilt angle within the respective circumferential area or in that the tilt angle is constant in one circumferential area and in the other circumferential area of the tilt angle varies.
  • the tilt angle vary "in a wave-like manner" and alternately increase and decrease from circumferential area to circumferential area and, for example, between a minimum of e.g. 18 ° and a maximum of e.g. "Oscillate” 22 ° or 26 °.
  • the "gradient” can e.g. 0.25 ° or 0.5 ° per cutting tooth, i.e. the tilt angle can change in equal angular steps from cutting tooth to cutting tooth.
  • a variation of the tilt angle over the circumferential edge of the circular knife is preferred, since with a circular knife - unlike a sickle knife - due to the superposition of the rotation around the axis of rotation and the circular movement around the axis running parallel to the axis of rotation - is not predetermined in practice the circumferential area with which the circular knife hits a product to be cut.
  • the total circumference of 360 ° can be an integral multiple of a period of the "tilt angle oscillation".
  • the invention makes it possible to improve the quality of the severed product slices. This increases the product yield and reduces manual reworking on the severed slices or on the portions formed from them. This in turn reduces downtimes on a packaging machine connected downstream of the slicing device.
  • a particular advantage of the cutting knife according to the invention is that the improved cutting quality simultaneously enables the cutting speed to be increased.
  • the individual machining of the cutting teeth according to the invention and, in particular, the individual design of the cutting surfaces, makes it possible to realize a wide variety of designs for knife teeth.
  • This allows the cutting knives to be specifically adapted to specific product properties.
  • An adjustment can also be made with regard to the cutting geometry.
  • the way in which the knife penetrates the respective product can be taken into account when producing the toothing, taking into account the position of the product in the cutting device, in particular in a so-called Cutting shaft, as well as taking into account the size of the overall cutting area provided, in particular the cutting shaft width.
  • Such adaptation options are particularly important in so-called multi-lane cutting, that is to say when cutting several adjacent products at the same time.
  • the products are simultaneously fed to the cutting plane defined by the knife edge, at least essentially at right angles to the cutting plane.
  • FIG. 1 The illustrated embodiment of a cutting knife according to the invention for a high-speed slicer for slicing food products, as is known in principle to the person skilled in the art, is is a sickle knife, which rotates around an axis of rotation 11 in an intended direction of rotation during a cutting operation.
  • the rotating knife 10 plunges into the product to be sliced with an immersion area 33, which extends, for example, over a circumferential angle range of 74 ° and has a circumferential length of approximately 317 mm.
  • the immersion area 33 is followed by a transition area 32, which extends, for example, over a circumferential angle range of 41 ° and has a circumferential length of approximately 205 mm.
  • This transition area 32 of the circumferential edge 13 is followed by a storage area 31 of the knife edge, which extends over a circumferential angle range of approximately 150 ° and has a circumferential length of approximately 917 mm.
  • the knife edge having these three areas 31, 32 and 33 is provided with a toothing according to the invention, which will be discussed in more detail below.
  • Each cutting tooth of the toothing has, among other things, a cutting surface 17 facing the front of the knife 10 (cf. Fig. 2 ), which has a certain slope.
  • the three areas 31, 32, 33 differ from one another with regard to the inclination of the cutting surfaces 17. This is explained in more detail below.
  • the Fig. 1 is a plan view of the front of the knife 10, which faces away from the product to be sliced or the products to be sliced at the same time during the cutting operation.
  • the axis of rotation 11 runs centrally through a circular receiving opening 12 of the knife 10, by means of which the knife 10 is attached to a knife holder of the slicing device, not shown here can be attached.
  • the knife holder comprises, for example, a rotor hub of a high-speed slicer, as is fundamentally known to the person skilled in the art.
  • Adjoining the receiving opening 12 is an end face 38 which, in this exemplary embodiment, is planar and runs perpendicular to the axis of rotation 11.
  • an inclined surface 37 adjoins the end face 38 radially on the outside, from which the individual cutting surfaces 17 of the cutting teeth 15 ( Fig. 2 ) extend radially outward.
  • the tilt angle of the inclined surface 37 i.e. the angle between the inclined surface 37 and a clamping plane AE (cf. Fig. 3 ) is smaller than the smallest tilt angle provided for the cutting surfaces 17.
  • the inclined surface 37 runs flatter than each cutting surface 17, so that an imaginary radial extension of the inclined surface 37 extends the clamping plane AE radially outside the peripheral edge 13 ( Fig. 1 ) would cut.
  • FIG. 2 is an enlarged section of FIG Fig. 1 in the immersion area 33, which shows the first nine cutting teeth 15 of the toothing starting from the smallest radius Rmin of the knife 10.
  • the cutting surfaces 17 are each delimited radially on the outside by a cutting edge 19.
  • Transitions 27 formed as depressions between the cutting teeth 15 are also radially outward from a cutting edge 21 ( Fig. 3 ) that connects two cutting edges 19 of the cutting surfaces 17.
  • the transition from the inclined surface 37 to the cutting surfaces 17 of the cutting teeth 15 is each formed by a straight inner edge 36, from the end points of which an edge extends to the corresponding end point of the relevant cutting edge 19.
  • These edges 25 ( Fig. 4 ) thus each extend between the inclined surface 37 and the clamping plane AE.
  • the inner edges 36 can each be sharp-edged or rounded.
  • a transition edge 39 is also formed between the flat end face 38 and the inclined face 37.
  • the edge 39 can be sharp-edged or rounded.
  • FIG. 3 The middle upper illustration with the section BB shows an enlarged section of the toothing of the knife 10 from FIG Fig. 1 in the storage area 31.
  • the illustration below shows an enlargement of the teeth in the transition area 32
  • the illustration below with the section CC shows an enlargement of the teeth in the immersion area 33.
  • the intended direction of rotation red of the knife 10 is indicated in each case by an arrow.
  • the cutting surfaces 17 are not only tilted, ie each connect the inner edge 36 located above the clamping plane AE in the inclined surface 37 with the clamping plane AE, but are also positioned pointing in the direction of rotation red.
  • the tilt angle KW in the storage area 31 (upper middle illustration in Fig. 3 ) is comparatively large.
  • the tilt angle KW is preferably 26 ° here.
  • the tilt angle KW is smaller than in the storage area 31.
  • the tilt angle KW here is preferably 18 °.
  • the cutting surfaces 17 are consequently flatter or less steep than in the storage area 31. As already explained at the beginning, this in particular avoids compressions of the product when the knife 10 is immersed, whereas at the end of the cutting process due to the steeper cutting surfaces 17 in the storage area 31 improved storage of the respectively separated product slice can be achieved.
  • the cutting surfaces 17 are tilted such that three consecutive cutting surfaces 17 each have the same tilt angle KW.
  • the tilt angle KW decreases by 0.5 ° from the group of three to the immediately following group of three, with the last group of three in front of the immersion area 33 having a tilt angle KW of 18.5 °, which is then followed the cutting teeth 15 of the immersion area 33 each connect with a tilt angle KW of the cutting surface 17 of 18 °.
  • the tilt angle value in the immersion area 33 can again be 18 °, whereas in the deposit area 31 the tilt angle value is 22 ° and each angle step between immediately successive groups of three of cutting teeth 15 in the transition area 32 has a value of 0.25 °.
  • the pitch a of the toothing is constant over the entire circumferential area and in this exemplary embodiment is 5 mm.
  • the pitch of the toothing can vary, as already explained in the introductory part.
  • a transition 27 is provided between two immediately successive cutting surfaces 17, which transition 27 is designed as a recess running in the radial direction with a U-shaped cross section.
  • Each transition 27 (see also Fig. 4 ) comprises a transition surface 23, which merges radially on the inside via a transition edge 35 into the inclined surface 37 and is delimited radially on the outside by a transition edge 21 which lies in the cutting plane SE.
  • transition edges 21 connect the cutting edges 19 of the adjoining cutting surfaces 17 and are themselves designed as cutting edges. As a result, all of the cutting edges 19 and all of the transition edges 21 connecting two immediately consecutive cutting edges 19 together form a continuous, uninterrupted overall cutting edge.
  • this uninterrupted cutting edge which is formed jointly by the cutting edges 19 and the transition edges 21, lies continuously in the cutting edge plane SE.
  • Fig. 3 illustrates, the last, lowest middle representation schematically showing a section DD perpendicular to the cutting plane SE through the dash-dotted line of the representation above.
  • the dash-dotted line runs through the lowest point of the transition surface 23.
  • Points 1 and 2 are the points of intersection of the dash-dotted line with the cutting plane SE (point 1) or with the inclined surface 37 (point 2).
  • Points 3 and 4 are the points of intersection of a first transition edge 25 with the cutting plane SE (point 4) and with the inclined surface 37 (point 3), whereas points 5 and 6 are the points of intersection of a second transition edge 25 with the cutting plane SE (point 5 ) or the inclined surface 37 (point 6).
  • the two transition edges 25, the cutting edge 19 and the inner edge 36 span the respective cutting surface 17, which in this example is planar, that is to say does not have any curved course.
  • points 1, 4 and 5 as well as the cutting edge 19 connecting points 5 and 4 and the transition edge 21 connecting points 4 and 1 lie in the cutting plane SE, while points 2, 3 and 6 and the the inner edge 36 connecting points 6 and 3 and the transition edge 35 connecting points 3 and 2 lie in the inclined surface 37.
  • points 6 and 3 - measured in the radial direction - are at different distances from the axis of rotation 11, with point 6 being radially further out than point 3 and - since the inclined surface 37 is inclined with respect to the cutting plane SE - therefore closer located at the cutting plane SE than the point 3, ie the point 6 lies lower than the point 3.
  • the point 2 in turn lies radially further inward than the point 3 and consequently higher than the point 3 and higher than the point 6.
  • point 1 lies radially further inward than point 4, which in turn lies radially further inward than point 5.
  • all three points 1, 4 and 5 are at the same height level because they lie in the common cutting plane SE.
  • the specific lengths and relative positions of the edges 19, 25, 36 of the relevant cutting surface 17 connecting points 3, 4, 5 and 6 are selected in this exemplary embodiment in such a way that the cutting surface 17 is not only tilted, but also positioned, and in such a way that the cutting surface 17 faces red in the direction of rotation.
  • the cutting surfaces 17 are each set in such a way that the cutting surfaces 17 point in the intended direction of rotation red.
  • the adjustment of the cutting surfaces 17 results in a height offset or jump in the circumferential direction radially within the cutting edges 19, 21 between two immediately successive cutting surfaces 17 in the area of the relevant transition 27.
  • the four corner points 19a, 19b, 36a and 36b lie in a common plane, namely in the plane of the planar cutting surface 17.
  • a planar cutting surface 17 is not mandatory.
  • the cutting surface 17 can also be made concave or curved. It can also be provided that the corner points mentioned do not all lie in a common plane. The cutting surface 17 is then correspondingly curved.
  • Fig. 4 shows, purely by way of example, the possibilities of clearly defining the orientation of the cutting surface 17 in a fixed reference system.
  • the rear end 19b of the cutting edge 19 as seen in the intended direction of rotation red forms the reference point.
  • the movement tangent T 'at the rear end 19b is perpendicular to the radius R through the rear end 19b and is identical to the motion vector of the rear end 19b.
  • the cutting edge 19 is inclined by an angle ⁇ , specifically in such a way that the cutting edge 19 points in the direction of rotation red.
  • FIG Fig. 4 Another alternative possibility for defining the "inclination" of the cutting edges 19 and thus the lead angle AsW is also shown in FIG Fig. 4 shown.
  • the lead angle AsW can be the angle between a cutting edge 19 and, for example, that (in Fig. 4 dash-dotted) connecting path V can be defined, which connects the rear end 19b of the relevant cutting edge 19 and the rear end 19b of the cutting edge 19 immediately following in the intended direction of rotation red.
  • all these connecting lines V together form a polygon, which approximates an imaginary continuous curve, which is not a circle, on which all rear ends 19b of the cutting edges 19 lie and which corresponds at least approximately to the cutting edge of a conventional toothless sickle knife.
  • the front end 19a of each cutting edge does not lie on the relevant connecting path V, but on a smaller radius, i.e. closer to the axis of rotation of the knife than any point on the connecting line V.
  • the cutting edge can, however, also lie on the connecting line V.
  • the cutting surfaces 17 each consist of several individual surfaces, each of which is planar and / or, for example, convexly or concavely curved.
  • the cutting surfaces 17 can have angular or rounded transitions between the individual surfaces.
  • the cutting surfaces 17 are each when they are curved part of a regular or differentiable surface in the mathematical sense and consequently has no edges.
  • Figure 5a shows the example of conventional knives the definition of the so-called clearance angle FW in a section perpendicular to the cutting plane SE defined by the cutting edge SK and parallel to the axis of rotation, not shown.
  • FW 0 °
  • the illustration on the right shows a knife with a clearance angle FW other than zero.

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  • Life Sciences & Earth Sciences (AREA)
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  • Food-Manufacturing Devices (AREA)
  • Knives (AREA)

Claims (15)

  1. Couteau de coupe, en particulier couteau en forme de faucille ou couteau spirale ou couteau circulaire, destiné à un dispositif pour couper des produits alimentaires, en particulier à une trancheuse à haute performance, et étant en rotation autour d'un axe de rotation (11) pendant une opération de coupe,
    comportant
    une arête périphérique (13) radialement extérieure faisant office de tranchant, qui présente une allure incurvée autour de l'axe de rotation (11), et une multitude de dents de coupe (15) qui sont agencées en étant réparties successivement le long de l'arête périphérique (13),
    chaque dent de coupe (15) présentant un tranchant qui comprend une surface de coupe (17) et une arête de coupe (19) délimitant radialement à l'extérieur la surface de coupe (17),
    dans lequel
    les arêtes de coupe (19) se situent dans un plan de coupe commun (SE), et les surfaces de coupe (17) s'étendent chacune de façon inclinée par rapport au plan de coupe (SE) et recoupent le plan de coupe (SE) sous un angle de basculement (KW), les arêtes de coupe (19) formant chacune la ligne de coupe entre la surface de coupe (17) et le plan de coupe (SE),
    les surfaces de coupe respectives (17) de deux dents de coupe (15) directement successives sont reliées l'une à l'autre par une surface de transition (23), la surface de transition (23) étant réalisée sous forme de renfoncement en retrait par rapport aux surfaces de coupe (17),
    caractérisé en ce que
    chaque surface de coupe (17) est reliée aussi bien à la surface de coupe (17) d'une dent de coupe (15) directement précédente qu'à la surface de coupe (17) d'une dent de coupe (15) directement successive, par l'un des renfoncements.
  2. Couteau selon la revendication 1,
    dans lequel
    les arêtes de coupe (19) sont chacune orientées de telle sorte que les surfaces de coupe (17) sont positionnées en étant orientées dans la direction de rotation prévue (Rot), et/ou
    l'angle de basculement (W) des surfaces de coupe (17) le long de l'arête périphérique (13) est constant, et/ou
    l'angle de basculement (W) est dans une plage d'environ 15° à 30° et est de préférence d'environ 20°.
  3. Couteau de coupe, en particulier couteau en forme de faucille ou couteau spirale ou couteau circulaire, destiné à un dispositif pour couper des produits alimentaires, en particulier à une trancheuse à haute performance, et étant en rotation autour d'un axe de rotation (11) pendant une opération de coupe,
    comportant
    une arête périphérique (13) radialement extérieure faisant office de tranchant, qui présente une allure incurvée autour de l'axe de rotation (11), et une multitude de dents de coupe (15) qui sont agencées en étant réparties successivement le long de l'arête périphérique (13),
    dans lequel
    chaque dent de coupe (15) présente un tranchant qui comprend une surface de coupe (17) et une arête de coupe (19) délimitant radialement à l'extérieur la surface de coupe (17),
    au moins quelques-unes des arêtes de coupe (19) ou chaque arête de coupe (19) forme(nt) un angle de coupe (AsW), en particulier non nul, avec une tangente de mouvement (T') dans un plan de coupe (SE),
    la tangente de mouvement (T') et le rayon (R) se recoupent en un point d'extrémité arrière (19b) de l'arête de coupe correspondante (19), et/ou au moins quelques-unes des arêtes de coupe (19) sont orientées de telle sorte qu'une extrémité avant (19a) de l'arête de coupe (19), vue dans la direction de rotation prévue (Rot), se trouve sur un rayon plus petit que celui de l'extrémité arrière (19b) de l'arête de coupe correspondante (19), et/ou au moins quelques-unes des arêtes de coupe (19) ou chaque arête de coupe (19) forme(nt) un angle de coupe (AsW), en particulier non nul, avec une ligne de liaison (V), la ligne de liaison (V) reliant entre elles les deux extrémités arrière (19b) ou les deux extrémités avant (19a) d'une arête de coupe respective (19) et de l'arête de coupe (19) directement précédente ou successive,
    les surfaces de coupe (17) de deux dents de coupe (15) directement successives sont reliées entre elles par une surface de transition (23),
    la surface de transition (23) est réalisée sous la forme d'un renfoncement en retrait par rapport aux surfaces de coupe (17),
    caractérisé en ce que
    chaque surface de coupe (17) est reliée aussi bien à la surface de coupe (17) d'une dent de coupe (15) directement précédente qu'à la surface de coupe (17) d'une dent de coupe (15) directement successive, par l'un des renfoncements.
  4. Couteau selon l'une des revendications précédentes,
    dans lequel
    le renfoncement est réalisé sous forme d'entaille, de rainure, de sillon ou de gorge s'étendant en direction radiale, et/ou
    le renfoncement constitue un dégagement.
  5. Couteau selon l'une des revendications précédentes,
    dans lequel
    les surfaces de coupe (17) sont chacune positionnées en étant orientées dans la direction de rotation prévue (Rot), et/ou les surfaces de coupe (17) sont chacune au moins essentiellement planes ou s'étendent sans arêtes de façon incurvée, en particulier de façon convexe ou concave.
  6. Couteau selon l'une des revendications précédentes,
    dans lequel
    au moins quelques-unes des arêtes de coupe (19) ou chaque arête de coupe (19) forme(nt) un angle de coupe (AsW), en particulier non nul, avec une tangente de mouvement (T') dans le plan de coupe (SE),
    la tangente de mouvement (T') et le rayon (R) se recoupent en un point d'extrémité arrière (19b) de l'arête de coupe correspondante (19), et/ou
    au moins quelques-unes des arêtes de coupe (19) ou chaque arête de coupe (19) forme(nt) un angle de coupe (AsW), en particulier non nul, avec une ligne de liaison (V), la ligne de liaison (V) reliant entre elles les deux extrémités arrière (19b) ou les deux extrémités avant (19a) de l'arête de coupe respective (19) et de l'arête de coupe (19) directement précédente ou successive.
  7. Couteau selon l'une des revendications précédentes,
    dans lequel
    l'angle de coupe (AsW) des arêtes de coupe (19) le long de l'arête périphérique (13) est constant et non nul, et/ou
    toutes les arêtes de coupe (19) se situent dans un plan commun, de préférence dans un plan de coupe (SE) ou dans un plan parallèle au plan de positionnement (AE), et/ou
    toutes les arêtes de coupe (19) et toutes les arêtes de transition (21) reliant respectivement deux arêtes de coupe (19) directement successives constituent conjointement un tranchant non interrompu qui se situe en particulier dans un plan de coupe (SE) ou dans un plan parallèle au plan de positionnement (AE), et/ou
    les arêtes de coupe (19) et/ou les arêtes de transition (21) reliant respectivement deux arêtes de coupe (19) directement successives sont chacune rectilignes.
  8. Couteau selon l'une des revendications précédentes,
    dans lequel
    au moins quelques-unes des arêtes de coupe (19) sont orientées de telle sorte qu'une extrémité avant (19a) de l'arête de coupe (19), vue dans la direction de rotation prévue (Rot), se situe sur un rayon plus petit que celui de l'extrémité arrière (19b) de l'arête de coupe correspondante (19).
  9. Couteau selon l'une des revendications précédentes,
    dans lequel
    les arêtes de coupe respectives (19) de deux dents de coupe (15) directement successives sont reliées l'une à l'autre par une arête de transition (21), l'arête de transition (21) étant réalisée sous forme d'arête de coupe.
  10. Couteau selon l'une des revendications précédentes,
    dans lequel
    la surface de transition (23) est délimitée radialement vers l'extérieur par une arête de transition (21) reliant les deux arêtes de coupe (19) des dents de coupe (15), et/ou
    la surface de transition (23) présente en section transversale une allure incurvée en particulier en forme de U ou en forme de V entre les deux surfaces de coupe (17), le côté ouvert du U ou du V étant dirigé dans la même direction que les surfaces de coupe (17).
  11. Couteau selon l'une des revendications précédentes,
    dans lequel
    les arêtes de coupe (19) présentent une longueur périphérique constante et/ou une longueur d'arête constante, et/ou
    le pas (a) des dents de coupe (15) est constant et en particulier compris entre environ 3 mm et 6 mm, de préférence d'environ 5 mm, ou
    le pas des dents de coupe (15) varie en direction périphérique, en particulier par rapport aux longueurs périphériques des dents de coupe (15) et/ou par rapport aux longueurs périphériques des transitions (27) entre les dents de coupe (15).
  12. Couteau selon l'une des revendications précédentes,
    dans lequel
    l'arête périphérique (13) présente au moins une zone périphérique (31, 33) de type I ayant une pluralité de dents de coupe (15) dont les surfaces de coupe (17) présentent le même angle de basculement (KW), et/ou l'arête périphérique (13) présente, en particulier en supplément à au moins une zone périphérique (31, 33) de type I, au moins une zone périphérique (32) de type II ayant une pluralité de dents de coupe (15) dont les surfaces de coupe (17) présentent un angle de basculement variable (KW), et l'angle de basculement (KW) varie respectivement en particulier d'une dent de coupe (15) à une dent de coupe (15) directement voisine, ou l'angle de basculement (KW) varie respectivement d'un groupe de n > 1 dents de coupe successives (15) ayant entre elles le même angle de basculement (KW), à un groupe directement voisin de m > 1 dents de coupe successives (15) ayant entre elles le même angle de basculement (KW), et en particulier, n = m = 2, 3, 4 ou 5.
  13. Couteau selon la revendication 12,
    dans lequel
    l'arête périphérique (13) entre deux zones périphériques (31, 33) de type I comprend une zone périphérique (32) de type II, dans laquelle la valeur de l'angle de basculement (KW) varie pour passer de la valeur de l'angle de basculement de ladite une zone périphérique (31) de type I à la valeur de l'angle de basculement de l'autre zone périphérique (33) de type I.
  14. Couteau selon l'une des revendications précédentes,
    dans lequel
    le couteau est un couteau circulaire,
    l'angle de basculement (KW) des surfaces de coupe (17) est soit constante sur toute l'arête périphérique (13) soit varie le long de l'arête périphérique (13), et
    en particulier, lors d'un angle de basculement (KW) variable, il est prévu plusieurs zones périphériques dont au moins deux zones périphériques se distinguent de par la valeur de l'angle de basculement (KW) constant au sein de la zone périphérique respective ou de par le comportement de modification de l'angle de basculement (KW) au sein de la zone périphérique respective, ou bien elles se distinguent par le fait que dans ladite une zone périphérique l'angle de basculement (KW) est constant et dans l'autre zone périphérique l'angle de basculement (KW) varie.
  15. Couteau selon la revendication 12 ou 13,
    dans lequel
    le couteau est un couteau en forme de faucille ou un couteau spirale, le rayon de courbure de l'arête périphérique (13), vue en direction de rotation prévue (Rot), diminue pour passer d'un rayon maximal (Rmax) à un rayon minimal (Rmin), et
    la valeur de l'angle de basculement (KW) de la zone périphérique (32) de type II, vue en direction de rotation (Rot), diminue pour passer d'une valeur d'angle de basculement plus grande à une valeur d'angle de basculement plus petite, en particulier à des pas angulaires de même taille d'une dent de coupe (15) à une autre dent de coupe (15), et
    en particulier, la valeur d'angle de basculement plus grande de ladite une zone périphérique (31) de type I est dans la plage de 20° à 30° et de préférence entre 22° et 26°, et la valeur d'angle de basculement plus petite de l'autre zone périphérique (33) de type I est dans la plage de 15° à 22° et de préférence entre 17° et 19°, et
    chaque pas angulaire est dans la plage de 0,2° à 1°, de préférence dans la plage de 0,25° à 0,5°.
EP18196630.0A 2016-12-16 2017-12-07 Couteau Active EP3459699B1 (fr)

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DE102017108841.5A DE102017108841A1 (de) 2016-12-16 2017-04-25 Schneidmesser und verfahren zu dessen herstellung
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EP3338972B1 (fr) 2016-12-16 2019-07-17 Weber Maschinenbau GmbH Breidenbach Couteau
DE102019201519A1 (de) 2019-02-06 2020-08-06 Hagedorn Spiralmesser GmbH Verzahntes Schneidmesser
CN113179750B (zh) * 2021-05-27 2022-03-29 新疆农业大学 铲切组合式红花采摘机械手及其控制方法

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DE10004836C1 (de) 2000-02-01 2001-10-31 Mws Schneidwerkzeuge Gmbh & Co Rundmesser für Allesschneider und Vorrichtung zur Herstellung der Schneidezahnung
WO2006020237A2 (fr) 2004-07-30 2006-02-23 Formax, Inc. Lame dentelee destinee a une trancheuse
DE102007040350A1 (de) 2007-08-27 2009-03-05 Weber Maschinenbau Gmbh Breidenbach Schneidmesser
EP2641706A1 (fr) 2012-03-23 2013-09-25 Adiamas Procédé de réalisation d'une lame de coupe et installation de mise en oeuvre d'un tel procédé
WO2014114579A2 (fr) 2013-01-25 2014-07-31 Gea Food Solutions Germany Gmbh Lame coupante à angle de coupe variable
DE102017108841A1 (de) 2016-12-16 2018-06-21 Weber Maschinenbau Gmbh Breidenbach Schneidmesser und verfahren zu dessen herstellung
EP3338972A1 (fr) 2016-12-16 2018-06-27 Weber Maschinenbau GmbH Breidenbach Couteau

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DE3049075A1 (de) 1980-12-24 1982-07-22 Johannes Remmert Spezialschleiferei für die Brot-Industrie, 4796 Salzkotten Maschinenmesser, insbesondere kreis- oder bogenfoermiger gestalt
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DE10004836C1 (de) 2000-02-01 2001-10-31 Mws Schneidwerkzeuge Gmbh & Co Rundmesser für Allesschneider und Vorrichtung zur Herstellung der Schneidezahnung
WO2006020237A2 (fr) 2004-07-30 2006-02-23 Formax, Inc. Lame dentelee destinee a une trancheuse
DE102007040350A1 (de) 2007-08-27 2009-03-05 Weber Maschinenbau Gmbh Breidenbach Schneidmesser
EP2641706A1 (fr) 2012-03-23 2013-09-25 Adiamas Procédé de réalisation d'une lame de coupe et installation de mise en oeuvre d'un tel procédé
WO2014114579A2 (fr) 2013-01-25 2014-07-31 Gea Food Solutions Germany Gmbh Lame coupante à angle de coupe variable
DE102017108841A1 (de) 2016-12-16 2018-06-21 Weber Maschinenbau Gmbh Breidenbach Schneidmesser und verfahren zu dessen herstellung
EP3338972A1 (fr) 2016-12-16 2018-06-27 Weber Maschinenbau GmbH Breidenbach Couteau

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EP3338972A1 (fr) 2018-06-27
EP3338972B1 (fr) 2019-07-17

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