EP2576126A1 - Couteau pour machine de coupe mécanique pour le traitement de produits alimentaires - Google Patents

Couteau pour machine de coupe mécanique pour le traitement de produits alimentaires

Info

Publication number
EP2576126A1
EP2576126A1 EP11724152.1A EP11724152A EP2576126A1 EP 2576126 A1 EP2576126 A1 EP 2576126A1 EP 11724152 A EP11724152 A EP 11724152A EP 2576126 A1 EP2576126 A1 EP 2576126A1
Authority
EP
European Patent Office
Prior art keywords
base
knife
cutting
joint
cutting body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11724152.1A
Other languages
German (de)
English (en)
Inventor
Egon Ehrle
Andreas Gebert
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.)
Cewotec gGmbH
BE MASCHINENMESSER GmbH and Co KG
SLAYER BLADES Srl
Original Assignee
Cewotec gGmbH
BE MASCHINENMESSER GmbH and Co KG
SLAYER BLADES Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cewotec gGmbH, BE MASCHINENMESSER GmbH and Co KG, SLAYER BLADES Srl filed Critical Cewotec gGmbH
Publication of EP2576126A1 publication Critical patent/EP2576126A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/02—Plasma welding
    • B23K10/027—Welding for purposes other than joining, e.g. build-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/00 - B23K28/00
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/00 - B23K28/00 relating to soldering or welding
    • B23K31/025—Connecting cutting edges or the like to tools; Attaching reinforcements to workpieces, e.g. wear-resisting zones to tableware
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/308—Fe as the principal constituent with Cr as next major constituent
    • B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/40—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools shearing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting 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
    • B26D1/0006—Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting 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
    • B26D1/01—Cutting 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
    • B26D1/12—Cutting 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
    • B26D1/14—Cutting 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/20—Tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • B23K2103/05—Stainless steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/002—Materials or surface treatments therefor, e.g. composite materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/0033—Cutting members therefor assembled from multiple blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/0053—Cutting members therefor having a special cutting edge section or blade section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/02—Machines or methods used for cutting special materials for cutting food products, e.g. food slicers
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2251/00—Treating composite or clad material
    • C21D2251/04—Welded or brazed overlays
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support

Definitions

  • the present invention relates to a knife for cutting machines and a method for producing a knife for cutting machines.
  • the present invention relates to a machine knife for food processing.
  • Machine knives are used, for example, for comminuting and / or mixing raw materials, in particular foods such as meat, cheese, sausage, vegetables, fruit, biomass or the like. Also, knives for slicing machines are used, at least indirectly, for conveying protruding outlets within a processing vessel. The geometry and structure of the knife are adapted to a particular machining task.
  • knives Due to their particularly high load, knives often only have a short service life of a few hours and are therefore dismantled and re-sharpened after just a few hours. For example, it is known that knives used for mincing bone-in-meat may be reground after only 3 hours of operation. Generally, it is endeavored to produce knives with materials that both withstand high transverse forces and have a high cutting strength, ie knives that have a high degree of hardness, high toughness and a long service life.
  • a knife for cutting machines which has a base body of a first material and a cutting body of a second material with at least one formed cutting edge, wherein the second material has a higher degree of hardness than that first material and the cutting body along a joint is connected to the base body.
  • the knife according to the invention obtains its properties by its method of manufacture, which comprises the following steps:
  • the present invention includes the recognition that low thermal conductivity underlays used in the manufacture of known knives for cutting machines, such as ceramic pads, adversely affect the quality of known knives. Characterized in that the base body of the knife according to the invention rests during the deposition welding of the second material on a substrate made of a third material of high thermal conductivity, the cutting body of the knife according to the invention has a particularly high surface quality.
  • the high thermal conductivity of the third material of the substrate which is typically in the range of the thermal conductivity of metals, namely causes a rapid dissipation of a located in the body and especially in the cutting body heat towards the substrate.
  • the pad is thus a heat dissipation pad.
  • the proportion of the first material in the second material of the cutting body is thus not more than 5% in one embodiment of the knife according to the invention.
  • the knife according to the invention has fewer pores in the cutting body and shows less binding errors than known knives.
  • the pad of the third material of high thermal conductivity acts on the one hand in the sense of a weld pool and on the other in the sense of cooling the body and the cutting body during the hardfacing and after the build-up welding, in other words in terms of heat reduction.
  • the knife according to the invention is distinguished, in particular, by a very long service life, which is extended by a factor of 2 to 5 compared to service life of comparable blades.
  • the material of the base body is, for example, a commercially available corrosion-resistant steel.
  • the cutting body is preferably produced by plasma powder build-up welding.
  • the second material of the cutting body is preferably an iron alloy.
  • the cutting body can also be produced by laser powder build-up welding.
  • the required melting process is carried out, for example, by means of a laser powder build-up welding system.
  • the pad does not necessarily have a high thermal conductivity.
  • the variant with the laser powder build-up welding has the advantage that in this case even less heat input is caused in the body and / or the pad. This is mainly due to the relatively fine melt stream. In this respect, the diffusion process and / or another material transport process between the base body and the cutting body is avoided even further, so that a quasi-discontinuous jump in values of material-specific parameters can be observed along the joint between the base body and the cutting body.
  • a material for a high thermal conductivity underlay (as a third material)
  • copper or a copper alloy is suitable and preferable.
  • the thermal conductivity of the third material is higher than that of the first and second materials.
  • This variant is particularly preferred when the cutting body is produced by plasma powder build-up welding, since the case Heat input is typically higher than in laser powder build-up welding and rapid heat removal to avoid distortion due to the heat input is advantageous.
  • base material and cutting bodies preferably have a thermal conductivity below 100 watts per Kelvin meter
  • the base for plasma powder build-up welding preferably has a thermal conductivity of over 200 watts per Kelvin meter or even better 300 watts per Kelvin meter.
  • the grinding of the cutting body for forming the at least one cutting edge can take place in various ways, for example in such a way that the cutting body tapers to one side or two sides or has a planar section perpendicular or angled to the base surface of the main body.
  • the joint may be provided with a groove, which allows a more consistent composite of cutting body and body.
  • the groove is thus filled with the second material during build-up welding.
  • the build-up welding takes place along the joint by means of a guided arc, which oscillates alternately away from the joint and toward the joint and is thus guided such that the second material is contract welded along the joint in sections in direction substantially perpendicular to the joint, and the cutting body is formed by subsequently joined perpendicularly job-welded material sections.
  • the welding beam is guided in the radial direction alternately to the knife center and away from the knife center, so that the fused together material sections in the circumferential direction to each other.
  • the joint is formed by a flat portion on the base body.
  • the joint is formed by a cylinder shell surface portion or conical surface area radially adjoining the base body.
  • any reworking of the knife is easier because the used cutting body can be easily separated, whereas at joints with a groove or a similar recording, the material of the cutting body must also be removed from this groove or from the similar recording before re-deposition welding, which is comparatively expensive.
  • a releasable connection of base body and cutting body by gluing o is also conceivable, which has the advantage that the entire harder cutting edge can be removed after exhaustion of the entire regrinding area and replaced by a new cutting edge.
  • the main body can thus be used for a longer term. The costs are considerably reduced for the user.
  • the knife according to the invention can be sharpened particularly frequently in this embodiment in relation to the size of the cutting body, which not only the service life, but also the life of the knife according to the invention is increased.
  • the portion forming the joint extends - corresponding to the direction of that surface of the base body to which the cutting body attaches - in a substantially vertical or slightly angled, for example at an angle between 90 "and 45" or between 90 ° and 135 ° to the base of the body extending direction.
  • the joint is not formed only by a single section, but for example by two or more sections angled to each other.
  • the pad used for the preparation is preferably a copper substrate, since copper has a particularly high thermal conductivity. According to the inventors, the above-described advantageous effects can be achieved in particular by a
  • the base of the base placed in the recess and the base of the recess define a differential surface, which in turn measures a base of the cutting body.
  • the second material is preferably die-welded such that it substantially fills the space between the joining part of the base body, the differential surface and a closure of the recess. The pad thus causes a particularly rapid dissipation of the heat of the order-welded second material and realizes a convenient backup of the weld pool.
  • the degree of mixing with the base material in the transition zone is max. 5%.
  • the recess of the pad is formed by at least two planar surfaces, namely by a first plane with a circumferential course which is substantially identical to the circumferential course of the base of the body, and a second deeper level with a circumferential course, the measures the target area of the cutting body.
  • the cutting body of this embodiment of the knife has a projection which is advantageous for certain applications.
  • the first material is a preferably corrosion-resistant steel, for example a steel with the material identifier 1.4021, 1.4023 or 1.4301.
  • the second material is preferably an iron alloy having, for example, the following ingredients: chromium (Cr), vanadium (V), molybdenum (Mo), manganese (Mn) , Silicon (Si), carbon (C) and nickel (Ni), eg of the following approximate composition: 15% Cr, 15% V, 1.3% Mo, 0.9% Mn, 0.9% Si, 4.2% C, 2% Ni, and otherwise iron.
  • Comparable alloys can also be used, e.g. one having the following approximate composition: 4.4% C, 0.9% Si, 17% Cr, 09% Mn, 2.0% Mo, 15% V, 3.0% Ni, and otherwise iron.
  • the knife according to the invention with such a cutting body is characterized by a particularly long service life.
  • the main body of the knife according to the invention consists exclusively of the first material.
  • a coating of the body is not necessary in most embodiments, since the material of the body is already resistant to corrosion.
  • a particularly high proportion of carbon in the corrosion-resistant steel for hardening the material of the base body is also not necessary due to the cutting body made of the second material.
  • the main body of the knife according to the invention has a coating for achieving an anti-sticking effect, ie such a coating, which counteracts adhesion of the cutting material to the base body.
  • the cutting body of the knife according to the invention extends for example over a distance of 5 to 25 mm away from the main body.
  • the cutting body in the unprocessed state for example, a thickness of up to 4 mm.
  • the joint is not formed solely by a flat portion, but in the Grundkör- a pre-milled groove or a similar receptacle is provided for the cutting body.
  • the cutting body of the knife according to the invention can be hardened so that the cutting body as a result obtains a hardness between 42 and 56 HRC (English: Hardness Rockwell Scale).
  • the base of the knife according to the invention is circular and the cutting body with the main body radially connected to this subsequently.
  • the main body of the knife according to the invention may be tempered / hardened and thus have a basic hardness of up to 45 HRC. In many cases, however, a compensation or curing is not required, especially not if the body has sufficient rigidity by a sufficient thickness or a special structural design. This is particularly true when stainless steels are used, or by special coating methods, a sufficient corrosion protection is achieved.
  • a second aspect of the present invention relates to a method for producing a knife for cutting machines, in which the knife is a basic body of a first material and a cutting body of a second material having at least one formed cutting edge, wherein the second material has a higher degree of hardness than the first material and the cutting body is connected along a joint to the base body and the method comprises the following steps:
  • a base surface of the base body and a surface of the base are at least substantially parallel to each other as well as the fitting point adjacent to the surface of the base;
  • the method according to the second aspect of the present invention shares the advantages of the knife of the first aspect of this invention.
  • the method of the second aspect of the invention has preferred embodiments which correspond mutatis mutandis to the additional features of the above-described embodiments of the knife of the first aspect. This is especially true for the material properties of the body, the cutting body and the pad.
  • a knife for cutting machines comprising a base body of a first material and a cutting body of a second material with at least one formed cutting edge, wherein the second material has a higher degree of hardness than that first material and the cutting body is connected along a joint to the base body, and wherein the knife is made by:
  • This aspect of the invention includes the knowledge that due to the laser powder build-up welding in the melting process only a comparatively low heat input in the base body and base is caused, so that a substrate particularly high thermal conductivity, such as a copper pads, to achieve the already concerning the First aspect of the invention explained advantages is not necessary. Nevertheless, even with the knife of the third aspect of the invention, such a substrate of high thermal conductivity can be provided for the manufacturing process.
  • the lateral attachment of the cutting body to the body has in comparison to a cutting body, which attaches in the radial direction of the body, the advantage that in this case during a subsequent cutting operation with the knife of the third aspect of the invention in an improved manner a simultaneous cutting as well Release effect is obtained.
  • the cutting body can be applied to the base body both in the form of a thin coating and in the form of a thick coating.
  • the cutting body has in the final, ground state vorzugswiese a cutting thickness in the ground state of about 1-3mm - a cutting width (as needed) over the entire regrinding range of about 15 to 20 mm hardness of the blade from 59 to 62 HRC (depending upon need)
  • a knife for cutting machines comprising a base body of a first material and a cutting body of a second material having at least one formed edge, the second material having a higher degree of hardness when the first material and the cutting body are connected to the base body along a joint, it is proposed that the following steps be included:
  • FIGS. 1 to 7 and 9 show, in schematic representation, different embodiments of the main body and the cutting body of the knives according to the invention.
  • Fig. 8 shows, also in a schematic representation, a resting on a base body after application of a cutting body.
  • the knife 40/50 according to the invention is designed in a composite form and comprises a main body 10 made of a first material 12 and a Cutting body 20 of a second material 22.
  • the second material 22 has a higher degree of hardness than the first material 12.
  • the cutting body 20 is connected along a joint 26 with the base body 10.
  • the material 12 used is preferably, but not always, a stainless or corrosion resistant steel such as 1.4006, 1.4021, 1.4024, 1.4301 m S355.
  • the second material 22 is preferably an iron-based alloy and is custom-welded along the joining portions 26, preferably by plasma powder plating, also known as PTA (Plasma Transfer Are), or laser powder build-up welding.
  • plasma powder plating also known as PTA (Plasma Transfer Are), or laser powder build-up welding.
  • the main body 10 of the knife to be produced is placed on the base 30, so that a base surface of the base 10 and a surface of the base 30 are at least substantially parallel to each other and the joint 26 adjacent to the surface of the pad 30.
  • the pad 30 is arranged to mechanically support the job-welded second material 22.
  • the cutting body 20 of the knife is ground to form a cutting edge 24.
  • the joint 26 is formed, for example, by a flat section or a cylinder jacket surface section or a conical surface section.
  • the section forming the joining parts 26 is perpendicular to the base surface of the base body 10.
  • the section is slightly angled, as in the embodiments shown in FIGS. 1 and 2, for example Angle of about 70 ° to the base of the body 10th
  • the grinding of the cutting body 20 for forming the cutting edge 24 can be carried out in various ways as shown in FIGS. 1 to 7, for example such that the cutting body 20 is either one-sided (FIGS. 1 and 4 to 6) or two-sided (Fig. 3 and Fig. 7) is pointed or has no formed tip, but two edges (Fig. 2)
  • FIG. 4 shows an embodiment in which the main body 10 consists not only of the first material 12 but also of a further material 14.
  • the further material 14 is, for example, a coating material.
  • 8 shows a knife resting on the support 30 in a composite form with a main body 10 and a cutting body 20.
  • the material 32 of the support 30 is preferably copper or a copper alloy.
  • the pad 30 has a recess 34 for the placement of the base body 10.
  • the base of the recess 34 is larger than the base of the body 10.
  • the base of the pad 30 and the base of the body 10 define a differential surface 36 which measures the base of the cutting body 20.
  • the second material 22 is weld-welded to substantially fill the space between the joint 26 of the base 10, the differential surface 36, and a termination 38 of the recess 34.
  • the pad 30 thus causes a particularly rapid dissipation of the heat of the order-welded material 22 and realizes a convenient backup of the weld pool.
  • the cutting body 20 was applied by means of laser powder build-up welding, in which case a substrate of high thermal conductivity does not necessarily have to be provided.
  • the base body 10 was initially placed on a base in such a way that a base surface of the base body 10 and a surface of the base lay at least substantially parallel to one another and the joint ran along a side of the base body facing away from the surface of the base. Then, the cutting body 20 was produced by laser powder build-up welding of the second material 22 on the first material 12 along the joint 26, so that the cutter body 20 formed laterally attaching to the base body 10.
  • the lateral attachment of the cutting body 20 to the base body 10 has in comparison to a cutting body, which attaches in the radial direction of the base body, the advantage that in this case during a subsequent cutting operation in an improved manner a simultaneous cutting and separating effect can be obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Knives (AREA)
  • Laser Beam Processing (AREA)
  • Nonmetal Cutting Devices (AREA)

Abstract

L'invention concerne un couteau pour machines de coupe, et un procédé de production d'un tel couteau. Le couteau comprend un corps de base (10) en un premier matériau (12) et un corps de coupe (20) en un deuxième matériau (22) présentant au moins une arête de coupe façonnée (24), le deuxième matériau (22) ayant un degré de dureté plus élevé que le premier matériau (12). Le corps de coupe (20) est lié le long d'un joint (26), avec le corps de base (10). L'invention est caractérisée en ce que le couteau est fabriqué selon les étapes suivantes : a) production d'un support (30) en un troisième matériau (32) de conductivité thermique plus élevée; b) application du corps de base (10) sur le support (30), de façon qu'une surface de base du corps de base (10) et qu'une surface du support soient sensiblement parallèles entre elles, et que le joint (26) soit adjacent à la surface du support (30); c) production du corps de coupe (20) par rechargement du deuxième matériau (22) sur le premier matériau (12), le long du joint (26), le support (30) étant disposé pour l'appui mécanique du deuxième matériau (22) appliqué par rechargement, et d) meulage du corps de coupe (22) pour la formation d'au moins une arête de coupe (24).
EP11724152.1A 2010-05-26 2011-05-26 Couteau pour machine de coupe mécanique pour le traitement de produits alimentaires Withdrawn EP2576126A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202010007393U DE202010007393U1 (de) 2010-05-26 2010-05-26 Maschinenmesser für die Lebensmittelverarbeitung
PCT/EP2011/058681 WO2011147936A1 (fr) 2010-05-26 2011-05-26 Couteau pour machine de coupe mécanique pour le traitement de produits alimentaires

Publications (1)

Publication Number Publication Date
EP2576126A1 true EP2576126A1 (fr) 2013-04-10

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EP11724152.1A Withdrawn EP2576126A1 (fr) 2010-05-26 2011-05-26 Couteau pour machine de coupe mécanique pour le traitement de produits alimentaires

Country Status (7)

Country Link
US (1) US9393649B2 (fr)
EP (1) EP2576126A1 (fr)
CN (1) CN103153525A (fr)
CA (1) CA2803123A1 (fr)
DE (1) DE202010007393U1 (fr)
RU (1) RU2563075C2 (fr)
WO (1) WO2011147936A1 (fr)

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Also Published As

Publication number Publication date
CA2803123A1 (fr) 2011-12-01
WO2011147936A1 (fr) 2011-12-01
US20130192441A1 (en) 2013-08-01
US9393649B2 (en) 2016-07-19
RU2563075C2 (ru) 2015-09-20
DE202010007393U1 (de) 2010-09-30
RU2012156870A (ru) 2014-07-10
CN103153525A (zh) 2013-06-12

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