EP2786651B1 - Hache-paille - Google Patents

Hache-paille Download PDF

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Publication number
EP2786651B1
EP2786651B1 EP14162278.7A EP14162278A EP2786651B1 EP 2786651 B1 EP2786651 B1 EP 2786651B1 EP 14162278 A EP14162278 A EP 14162278A EP 2786651 B1 EP2786651 B1 EP 2786651B1
Authority
EP
European Patent Office
Prior art keywords
base body
hardness
hrc
region
knife
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.)
Active
Application number
EP14162278.7A
Other languages
German (de)
English (en)
Other versions
EP2786651A1 (fr
Inventor
Alois Kröll
Wolfgang Lutz
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.)
Gebr Busatis GmbH
Original Assignee
Gebr Busatis GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebr Busatis GmbH filed Critical Gebr Busatis GmbH
Publication of EP2786651A1 publication Critical patent/EP2786651A1/fr
Application granted granted Critical
Publication of EP2786651B1 publication Critical patent/EP2786651B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • 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

Definitions

  • Chopping blades are produced in different shapes. Regardless of their shape, however, they have at least one cutting area and a mounting area.
  • the body made of unhardened steel, the wear of the body progresses very quickly and it comes after some time to break out of the relatively brittle hard material coating, so that the blades must be replaced.
  • the body hardened, with a hardness of about 55 HRC has proven in practice, in which the Hardness difference to the hard material layer gives the desired self-sharpening effect due to different wear and still the wear of the body is so slow and thus delays the breaking out of the hard coating that results in long service life.
  • the chopper knife In the attachment area, the chopper knife is provided with openings for the passage of fastening screws, with which the knife is preferably attached to the chopper drum with the interposition of a terminal strip or fittings for pressure distribution via a knife carrier.
  • the knife In this area, the knife is subjected to clamping forces and impact stresses when the knife comes into contact with foreign objects, such as stones.
  • the transition region lying between the cutting area and the attachment area lies in the blade projection and is subject to considerable bending forces as well as impact loads, especially when in contact with foreign bodies.
  • the knife In order to avoid cracks and knife breaks due to the clamping, bending and impact forces, the knife must be sufficiently tough and elastic in the transition area and in the fastening area in order to avoid being damaged. In practice, a hardness of the blade in these ranges of about 40 HRC has been found to be suitable.
  • Transition area arise, which are the cause of the observed cracks and fractures.
  • the object of the present invention is to solve the problems of the prior art.
  • a chopper blade having a base body made of hardened steel, which has at least one cutting region, a fastening region and in each case one transition region lying between cutting region and attachment region, which is characterized in that the base body carries a hard material coating in the cutting region, and the hardness of the body is uniform over all areas.
  • the hardness of the body is uniform between 44 and 52 HRC, in particular 46 and 50 HRC and preferably at 48 HRC.
  • the thickness of the hard material layer can vary over the length of the base body. According to the geometry of the chopper, which carries the chopper, it can lead to different levels of stress and different levels of wear over the length of the body of the chopper blade.
  • the different thickness of the hard coating contributes to the bill.
  • the thickness may vary between 0.1 and 1 mm, in particular between 0.2 and 0.4 mm.
  • FIG. 1 an example of a chopper drum with attached chopping knives and the Fig. 2 a chopping knife in cross section and the hardness profile across the width of the knife in a knife according to the prior art and a knife according to the invention.
  • the Fig. 1 shows a chopper drum 1 with a rotary shaft 2.
  • a plurality of chopping blades 3 are mounted, with numerous knife shapes, such as flat, bent about its longitudinal axis or wound knives are known in various lengths, in a variety of patterns, such as aligned or offset , Are arranged parallel or inclined to the axis of rotation of the drum.
  • two rows of blades are provided side by side, the blades 3 are each inclined relative to the axis of rotation and each row of blades is inclined relative to the axis of rotation in a different direction.
  • the main body of the blade 3 has an opening which serves to pass one of the fastening screws (not shown), which eg directly into a thread in a knife carrier of the cutterhead is screwed.
  • a pressure plate for dividing the clamping forces may be provided, which act here in addition to impact loads on the body.
  • the transition region 6, which belongs to the blade projection and can be exposed to high bending and impact loads.
  • the graph shows the hardness curve across the width of a prior art chopper (curve X) and across the width of a chopper blade according to the invention (curve Y).
  • the main body of the knife of the prior art (curve X) has a hardness A in the cutting area, for example 55 HRC, which drops in the transition area and after a hardening sink to approximately the natural hardness D of the body, e.g. 30 HRC, in a hardness C, e.g. 40 HRC in the attachment area passes.
  • the different hardnesses are achieved by conventional tempering processes and are reflected in different remuneration structures, which also result in different volume expansions in the different areas, which results in residual stresses.
  • the hardness, and preferably also the compensation structure over the entire width, i. from the cutting edge 9 to the end of the attachment region 7 facing away from the cutting edge 9 uniformly at value B, e.g. 48 HRC, so that no residual stresses can arise and also the production is facilitated.
  • value B e.g. 48 HRC

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Heat Treatment Of Articles (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Knives (AREA)
  • Handling Of Sheets (AREA)
  • Materials For Photolithography (AREA)

Claims (7)

  1. Couteau hacheur comprenant un corps de base en acier trempé, qui présente au moins une zone de coupe (5), une zone de fixation (7) et respectivement une zone de transition (6) placée entre la zone de coupe (5) et la zone de fixation (7), sachant que le corps de base a un revêtement en substance dure (8) dans la zone de coupe (5) et caractérisé en ce que la dureté du corps de base est uniforme sur toutes les zones.
  2. Couteau hacheur selon la revendication 1, caractérisé en ce que la structure trempée du corps de base est uniforme sur toutes les zones.
  3. Couteau hacheur selon la revendication 2, caractérisé en ce que la structure trempée du corps de base est une structure trempée martensitique ou bainitique.
  4. Couteau hacheur selon l'une des revendications précédentes, caractérisé en ce que la dureté du corps de base est uniforme entre 44 et 52 HRC.
  5. Couteau hacheur selon la revendication 4, caractérisé en ce que la dureté du corps de base est uniforme entre 46 et 50 HRC, de préférence à 48 HRC.
  6. Couteau hacheur selon l'une des revendications précédentes, caractérisé en ce que l'épaisseur de la couche de substance dure varie sur la longueur du corps de base.
  7. Couteau hacheur selon la revendication 6, caractérisé en ce que l'épaisseur de la couche de substance dure varie entre une épaisseur minimale de 0,1 mm et une épaisseur maximale de 1 mm, en particulier entre une épaisseur minimale de 0,2 mm et une épaisseur maximale de 0,4 mm.
EP14162278.7A 2013-04-04 2014-03-28 Hache-paille Active EP2786651B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATGM111/2013U AT13482U1 (de) 2013-04-04 2013-04-04 Häckselmesser

Publications (2)

Publication Number Publication Date
EP2786651A1 EP2786651A1 (fr) 2014-10-08
EP2786651B1 true EP2786651B1 (fr) 2016-03-23

Family

ID=48784104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14162278.7A Active EP2786651B1 (fr) 2013-04-04 2014-03-28 Hache-paille

Country Status (4)

Country Link
US (1) US20140299702A1 (fr)
EP (1) EP2786651B1 (fr)
AT (1) AT13482U1 (fr)
DE (1) DE202013004147U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3984645A1 (fr) 2020-09-21 2022-04-20 Gebrüder Busatis Gesellschaft m.b.H. Élément de coupe

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9776192B2 (en) * 2013-01-25 2017-10-03 Phiston Technologies, Inc. Comminuting apparatus
US10925438B1 (en) 2014-04-14 2021-02-23 All Metal Sales, Inc. Blender blade formed of titanium or titanium alloy
CN105875095B (zh) * 2014-12-26 2019-04-09 湖南匡楚科技有限公司 带清洗结构的辊压绞碎式碎料装置
CN107637264A (zh) * 2017-11-13 2018-01-30 佳木斯大学 一种滚刀式秸秆切碎滚筒
US11400457B2 (en) 2018-07-20 2022-08-02 Phiston Technologies, Inc. Solid state drive media destroyer
US10657345B1 (en) 2019-07-02 2020-05-19 Phiston Technologies, Inc. Media destruction verification apparatus

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411208A (en) * 1965-06-14 1968-11-19 Sandvikens Jernverks Ab Cutting strips, cutting die knives, cutting rules and the like
US3681846A (en) * 1970-02-09 1972-08-08 Gerber Garment Technology Inc Knife blade construction
DE3715326A1 (de) * 1987-05-08 1988-11-24 Castolin Sa Verfahren zum herstellen einer selbstschaerfenden schneid- oder messerkante
US4945640A (en) * 1987-09-03 1990-08-07 Diwakar Garg Wear resistant coating for sharp-edged tools and the like
GB9108759D0 (en) * 1991-04-24 1991-06-12 Mcphersons Ltd Knife blades
AT404471B (de) 1997-04-28 1998-11-25 Busatis Gmbh Hartstoffbeschichtung für messer oder schneiden
US6656186B2 (en) * 2002-04-22 2003-12-02 Molecular Metallurgy, Inc. Bone saw blade and a method for manufacturing a bone saw blade
EP1852517B1 (fr) * 2002-05-15 2010-09-08 Kabushiki Kaisha Toshiba Lame de coupe composée d'un alliage Ni-Cr-Al
DE202006017540U1 (de) * 2006-11-17 2007-02-22 Frielinghaus Gmbh Häckselmesser
CA2717479C (fr) * 2010-07-26 2014-01-07 Laurent Denis Debroussailleuse
US9038359B2 (en) * 2012-11-12 2015-05-26 Deere & Company Rotary implement having hard metallic layer and method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3984645A1 (fr) 2020-09-21 2022-04-20 Gebrüder Busatis Gesellschaft m.b.H. Élément de coupe

Also Published As

Publication number Publication date
DE202013004147U1 (de) 2013-06-06
AT13482U1 (de) 2014-01-15
EP2786651A1 (fr) 2014-10-08
US20140299702A1 (en) 2014-10-09

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