• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Saw blade (1) for a saw for cutting stalky stalks, such as maize or millet, the saw blade (1) having a flank (5) and a facet flank (14) and a saw edge (2) with a succession of sawteeth (3) and the saw teeth (3) are provided with a wear protection zone (4) whose wear resistance is greater than that of the material of the main body of the saw blade (1), wherein the wear protection zone (4) on each of the planar flank (5) of each sawtooth (3), wherein the saw teeth (3) in the region of the tooth face (6), starting from the facet edge (14), a cutting facet (7), wherein the cutting facet (7) at a distance from the trailing edge (5) of the sawtooth (3) to a blunt tooth cutting edge (9) is formed, and wherein preferably the cutting facet (7) and the facet edge (14) without wear protection zone (4) are formed.
    公开号:AT519562A4
    申请号:T50376/2017
    申请日:2017-05-09
    公开日:2018-08-15
    发明作者:
    申请人:Gebrueder Busatis Ges M B H；
    IPC主号:
    专利说明:

    Saw blade for a saw for cutting stalky stalks
    The invention relates to a saw blade for a rotor mower for cutting stalked stalk crop, such as corn or millet, wherein the saw blade has a flat side and a facet edge and a saw edge with a succession of saw teeth and the saw teeth with a wear protection zone whose wear resistance is greater than that of the material of the main body of the saw blade, are provided.
    The saw blade according to the invention is preferably intended for use as a cutting element for mowing attachments for mowing stalked stalks, such as maize or millet. These are preferably row independent mowing attachments. These mower headers are provided in front position with adjacent Mährotoren and retractable drums, each Mährotor serve as a saw and the catch drums for further transport of the cut cuttings. The Mährotoren each comprise a carrier disk which is rotated by a drive shaft in rotation. Peripherally saw blades are arranged on the support disc according to the invention, at the outer edge of the saw teeth are arranged. The unit of adjacent Mährotoren is led just above the ground and cuts the stalk crop as close to the ground as possible, and associated collection drums convey the stalk stuff further into the harvester to a shredder.
    The Mährotor usually comprises three to ten segment-shaped saw blades, which are interchangeable when worn. When sawing and harvesting, today's high-performance harvesters cut enormous amounts of material, which also causes increased wear on the saw blades. Thus, it is an object of the present invention, the saw blades in such a way that the wear is minimized.
    Since the Mährotoren are rotated at great speed and are led just above the ground, it is a further object of the invention to keep the position of the Moradaro motors stable so that they are not bent away from the ground. Furthermore, the saw teeth should be self-sharpening and the teeth themselves have the highest possible wear resistance.
    In the prior art it is e.g. DE 19825758 B4 has become known for making the entire area of the teeth wear-resistant up to the mounting portion of the saw blade by applying a hard metal layer. For the cutting of stalked stalk crop is also described to arrange the carbide coating only on one surface of the saw blade to ensure a self-sharpening effect. The saw teeth disclosed there are initially formed dull and only after a long mowing form self-sharpening sharp cutting edges.
    With rotating saw blades, it has also become known to provide facets on the periphery of saw blades to provide tapered cutting edges on the tooth face. In known such tooth formations a hard metal coating was applied to the facets to increase the stability, but this has the disadvantage that when worn this layer sharpness and cutting ability is lost. Contact with solid objects such as stones causes chipping of the cemented carbide coating, leaving only the softer material of the main body of the saw blade. This disadvantage should also be avoided according to the invention.
    Furthermore, in the prior art, the problem arises that the respectively adjacent Mährotoren be rotated in opposite directions. Thus, two versions of the saw blades must be manufactured and used, namely a left and a right version. This increases costs and should be avoided.
    The present invention is primarily characterized in that the wear protection zone is mounted on each of the leading edge of each sawtooth, that the saw teeth in the region of the tooth face starting from the facet edge have a cutting facet, that the cutting facet is formed at a distance from the leading edge of the sawtooth and is formed to a blunt tooth blade, and that preferably the cutting facet and the facet edge are formed without wear protection zone.
    Preferably, the wear protection zone is arranged on the leading edge of the sawtooth from the tooth roof to reaching or near the bottom of the tooth. Advantageously, the wear protection zone is produced by means of high-energy jet processes.
    In one embodiment, the successive saw teeth are arranged with its flat side and the opposite facet edge alternately on the lower and the upper side of the saw blade.
    The tooth roofs of the saw teeth may be tangent to the saw line of the saw blade. The tooth roofs of the saw teeth can have a clearance angle 0 to 50 ° to the saw line.
    In another variant, the clearance angle can be 0 ° and the angle of intersection 90 °.
    The tooth roofs of the successive saw teeth of the saw edge can each be arranged at an oblique angle to the longitudinal center plane of the saw blade.
    The invention described below by way of example with reference to the drawings.
    Fig. 1 shows the front view of a mower, in which, inter alia, the subject invention can be used.
    Fig.2 is a plan view of the mower with a saw blade.
    3 is a schematic oblique view of an embodiment of the saw blade according to the invention with two enlarged detail views.
    Fig. 4 is a broken view of an embodiment of the saw blade, and
    5 shows a plan view of the saw edge in aborted state.
    Figures 6 and 7 show views of further embodiments of the saw blade.
    Fig. 1 shows the known arrangement of a mowing machine, which is used for mowing and preferably also for shredding stalk-like crop. The crop, not shown, is detected by the Mährotoren 17, which rotate about substantially vertical axes, just above the ground, cut and fed through the feed drums 15 in the feed chute 25 to the shredder or further processing. The feed drums 15 and Mährotoren 17 are usually in pairs next to each other and each pair has opposite direction of rotation 16. The catch drums 15 are provided on the ground-facing surface with the mower 17, which is provided at its periphery with the saw blade 1 according to the invention. Various designs and functions of such mowers are described in detail in the literature, such as in DE 195 31 918 B4.
    2 shows the top view of the mower 17, which is equipped with a saw blade 1. The finished mower motor 17 has, for example, four such saw blades 1, so that the entire periphery of the mower 17 is filled with saw blades 1.
    The saw blades 1 are arranged via fastening recesses 18 by means of screws on the support plate 19, which can be rotated by means of a central drive shaft 20 in the direction of rotation 16. The saw edge 2 surrounds the outer edge of the saw blade 1 and is formed by the tips of the saw teeth 3. It also gives the sawing line 24 in the clippings. From the saw blade back 21, the mounting portion 22 of the saw blade 1, which rests on the support plate 19 extends.
    Fig. 3 shows an embodiment of the saw blade 1 in an oblique view and in magnification.
    In this embodiment, all of the saw teeth 3 are provided with the cutting facets 7 on an upper side 11 of the saw blade 1, which is referred to below as the facet edge 14.
    In the enlarged view of FIG. 3 a, it can be seen that the cutting facet 7 extends upwards from the tooth base 13 via the tooth face 6 to the tooth roof 12.
    The enlarged view of Fig. 3b shows the other lower side 10 of the saw blade 1, which is executed plan, and is referred to as a flank 5. On the leading edge 5, the wear protection zone 4 is attached to each sawtooth 3. The wear protection zone 4 extends on one side to the edge, which is formed by the cutting facet 7 on the other side of the saw blade 1. The wear protection zone 4 extends from the cutting facet 7 along the tooth back 12 in the direction of the tooth back 23. In this arrangement, it is fully ensured that over the entire life of the saw blade 1, the wear resistance of the tooth and the self-sharpening effect is maintained. This means a saving of superfluous hard metal coating, as is otherwise known from the prior art.
    4 shows a further embodiment of the saw blade 1. Unlike in the previous embodiment according to FIG. 3, in this embodiment according to FIG. 4, the successive saw teeth 3 are each designed differently, so that therefore a sawtooth 3 on the upper side 11 shown of the saw blade 1, the wear protection zone 4, while the subsequent sawtooth 3 is provided on the upper side 11 with the Schneidfacette 7 and the associated
    Wear protection zone 4 on the other, not shown, lower side 10 of the saw blade 1 is arranged. Likewise, the trailing edge 5 follows the facet edge 14, which lie alternately on the lower side 10 and upper side 11 of the saw blade 1, respectively.
    The advantage of this alternating arrangement of face flank and facet flank resides in the symmetry of the saw blade, whereby all Mährotoren can be equipped with the same saw blades. As can be seen from Fig. 1, the Mährotoren 17 of each pair are moved in opposite directions of rotation. For this reason, there are "left" and different "right" rotors and saw blades. With the present embodiment according to FIG. 4, a single embodiment is sufficient, so that the production is simplified and the storage is also simplified and cheaper. Furthermore, incorrect assembly is prevented.
    5 shows the schematic plan view of the saw edge 2 of the saw blade 1 according to FIG. 4. The saw blade 1 essentially comprises the plate-shaped base body, from the periphery of which the cutting teeth 3 are machined. The cutting facets 7 are alternately formed in this embodiment on the various sides and open at the tooth roof 12 in a tooth cutting edge 9. This means that the cutting facets 7 are not carried out over the entire thickness of the saw blade 1, but it remains an obtuse part as tooth cutting edge. 9 left. This tooth cutter 9 with its blunt design is completely sufficient for the cut of the material to be cut at the given cutting speed and provides abrasion material, whereby the service life of the saw blade 1 is extended. Only when the tooth cutting edge 9 is worn out of the material of the saw blade 1 does the self-sharpening effect come into effect through the wear protection zones 4 arranged on the various sides.
    In Fig. 5, the position of the longitudinal center plane 8 of the saw blade 1 is located. The tooth cutting edge 9 can also extend to the longitudinal center plane 8 and beyond.
    In the embodiment according to FIG. 4, the saw line 24 is formed by the commonality of the tips of the tooth roofs 12. The tooth roofs 12 have a clearance angle> 1 to 50 °.
    Again, the successive saw teeth 3 with its flat side 5 and the opposite facet edge 14 alternately on the lower side 10 and the upper side 11, ie on the Plan flanks 5 and facet edges 14 arranged. In contrast to the embodiment according to FIG. 4, in the embodiment according to FIG. 6 each toothed roof 12 extends with the sawing line 24 and the teeth or their toothed cutting edges 9 are more preferred in the direction of rotation 16.
    The embodiment variant according to FIG. 7 differs from the previous embodiments in that for each saw tooth the clearance angle is 0 ° and the cutting angle is 90 °. Again, the Schneidfacette 7 and the wear protection zone 4 are alternately on the other sides. The tooth roofs 12 of the successive saw teeth 3 of the saw edge 2 are arranged at an oblique angle to the longitudinal center plane 8 of the saw blade 1, whereby along the edge is given the effect of entanglement.
    The preferred method for increasing the wear resistance FlochenergiestrahBerfahren characterized by a high energy density, so that in the production of wear protection zone a short exposure time of the high energy beam is sufficient and the material of the body is only affected on the surface or in very close to surface areas to about 1 mm. In particular, due to the high-energy jet method in the case of a precured material of the base body in the region of the heat-affected zone, only a slight drop in hardness occurs. If the material of the body is not hardened, it comes through the low penetration depth for rapid cooling and thus to a hardening of the material of the body and thus to a support effect for the wear protection zone. High energy jet methods are well described in the literature. For example, reference is made to DE 10 2007 059 865 A1, DE 196 49 865 C1 and EP 2 476 864 A1.
    The high energy jet method produces a wear protection zone that results in a substantial tool life extension, with the shape of the teeth being substantially unaltered by the high energy jet process. This near-net shape machining a good preservation of the tooth edges is possible and post-processing is not required.
    Advantageously, the wear protection zone has a wear resistance which is at least 10% larger and preferably at least 25% greater than the wear resistance of the material of the base body. The wear resistance or the abrasive wear resistance can be, for example, using the friction wheel method according to the standard ASTM G65.
    The wear protection zone can be produced by structural transformation of the material of the base body in a hardening process or remelting process by means of high-energy beam. In these methods, the material of the base body itself is changed in the near-surface area by the high-energy beam without filler material and thus increases the wear resistance.
    Alternatively, the wear-resistant zone may be made by a high-energy-beam coating, build-up welding, dispersing, alloying or smelting process. By this method, a filler material is placed on or in the surface of the body or introduced.
    Since with high-energy beam method of energy input into the material of the body is only in very close to the surface areas to about 1 mm and optionally applied material thickness very low, namely 0.05 to a maximum of 0.8 mm, preferably 0.1 to 0.4 mm, especially preferably 0.2 to 0.3 mm, there is no significant change in the shape of the teeth.
    The wear protection zone is preferably a hard material coating applied by a build-up welding method.
    The hard coating applied by a hardfacing method advantageously contains hard material particles embedded in a matrix material having a size between 40 and 250 gm, the matrix material preferably containing nickel, cobalt or a nickel-chromium-silicon compound and the hard material particles preferably carbides, nitrides or Oxides, more preferably tungsten carbides are.
    LIST OF REFERENCE NUMERALS 1 Saw blade 2 Saw edge 3 Saw tooth 4 Wear protection zone 5 Face flank 6 Tooth breast 7 Cutting facet 8 Longitudinal center plane 9 Cutter 10 Lower side of the saw blade 11 Upper side of the saw blade 12 Tooth roof 13 Tooth base 14 Facet edge 15 Retracting drums 16 Direction of rotation 17 Morel motor 18 Fastening recesses 19 Carrier disk 20 Drive shaft 21 Saw blade back 22 Mounting section 23 Tooth back 24 Saw line 25 Feed shaft
    权利要求:
    Claims (8)
    [1]
    claims
    A saw blade (1) for a saw for cutting stalky stalks, such as maize or millet, the saw blade (1) having a flank (5) and a facet flank (14) and a saw edge (2) with a succession of sawteeth ( 3), and the saw teeth (3) having a wear protection zone (4) whose wear resistance is greater than that of the material of the main body of the saw blade (1), characterized in that the wear protection zone (4) on each of the planar flank (5) of each sawtooth (3) is that the saw teeth (3) in the region of the tooth face (6), starting from the facet edge (14), a cutting facet (7), that the cutting facet (7) at a distance from the leading edge (5) of the sawtooth (3) to a blunt tooth cutting edge (9) is formed, and that preferably the cutting facet (7) and the facet edge (14) without wear protection zone (4) are formed.
    [2]
    2. Saw blade (1) according to claim 1, characterized in that the wear protection zone (4) on the flat side (5) of the sawtooth (3) from the tooth roof (12) to or near the tooth base (13) is arranged reaching.
    [3]
    3. Saw blade (1) according to any one of claims 1 or 2, characterized in that the wear protection zone (4) is made by means of high-energy jet method.
    [4]
    4. Saw blade (1) according to one of claims 1 to 3, characterized in that the successive sawteeth (3) with their flat side (5) and the opposite facet edge (14) alternately on the lower (10) and the upper (11) Side of the saw blade (1) are arranged.
    [5]
    5. Saw blade (1) according to one of claims 1 to 4, characterized in that the tooth roofs (12) of the saw teeth (3) are tangent to the saw line of the saw blade (1).
    [6]
    6. Saw blade (1) according to one of claims 1 to 4, characterized in that the tooth roofs (12) of the saw teeth (3) have a clearance angle greater than 0 to 50 ° to the saw line.
    [7]
    7. Saw blade (1) according to one of claims 1 to 4, characterized in that the clearance angle 0 ° and the cutting angle are 90 °.
    [8]
    8. Saw blade (1) according to claim 7, characterized in that the toothed roofs (12) of the successive sawteeth (3) of the saw edge (2) are each arranged at an oblique angle to the longitudinal center plane (8) of the saw blade (1).
    类似技术:
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    DE202007011503U1|2007-10-11|cutting blade
    DE3826984A1|1989-03-09|Mowing rotor
    EP2765847B1|2018-01-03|Conveyor region border for an agricultural harvester, in particular a forage harvester
    DE102019116945A1|2020-12-24|Shearbar
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    同族专利:
    公开号 | 公开日
    US20180326516A1|2018-11-15|
    AT519562B1|2018-08-15|
    US10668547B2|2020-06-02|
    EP3401048A1|2018-11-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1996005931A1|1994-08-19|1996-02-29|Black & Decker Inc.|Saw blade tooth form and method therefor|
    DE19649865C1|1996-12-02|1998-02-12|Fraunhofer Ges Forschung|Shaped body especially prototype or replacement part production|
    DE19825758A1|1997-08-14|1999-02-25|Busatis Gmbh|Saw with a saw body and teeth, and method for its production|
    WO2011120111A1|2010-03-29|2011-10-06|Encarnacao Milton Jose Da|Constructive arrangement in saw blade|
    US2259015A|1939-12-05|1941-10-14|Marshall C Anderson|Rotary cutter|
    US2961910A|1949-04-02|1960-11-29|Grassmann Gunther|Circular saw for cutting hot metals|
    US2770267A|1954-01-05|1956-11-13|Arthur G Edmiston|All purpose saw blade|
    US3866504A|1971-02-26|1975-02-18|Sandvik Ab|Saw blade|
    JPS5525786Y2|1977-11-10|1980-06-21|
    JPS54180130U|1978-06-09|1979-12-20|
    JPS57117940U|1981-01-16|1982-07-22|
    CA2071627A1|1992-06-22|1993-12-23|Kary P. Suronen|Lawn mower conversion method|
    US5331876A|1992-07-30|1994-07-26|Sandvik Ab|Saw blade for cutting metal|
    DE19531918B4|1995-08-30|2005-02-24|Maschinenfabrik Kemper Gmbh & Co. Kg|Machine for row-independent mowing and shredding of corn u. Like. Stem-like crop|
    DE19647561B4|1996-11-18|2008-02-07|Wetzel, Frank|Saw blade, in particular a fusion saw blade|
    US5848473A|1997-01-29|1998-12-15|Fiskars Inc.|Saw blade|
    US5906053A|1997-03-14|1999-05-25|Fisher Barton, Inc.|Rotary cutting blade having a laser hardened cutting edge and a method for making the same with a laser|
    SE521223C2|2000-11-23|2003-10-14|Kapman Ab|Saw blades for metal|
    DE20020731U1|2000-12-07|2001-03-08|Schmitt Paul|Saw blade|
    DE102007059865A1|2007-12-12|2009-06-18|Bayerische Motoren Werke Aktiengesellschaft|Producing a mold body by structuring powder forming metallic material in layered manner, comprises subjecting layers one upon the other and melting each powder layer before bringing the powder layer with a wave like high energy radiation|
    EP2476864A1|2011-01-13|2012-07-18|MTU Aero Engines GmbH|Bladed disk unit of a turbomachine ad method of manufacture|
    DE102012011465A1|2012-06-12|2013-12-12|Andreas Stihl Ag & Co. Kg|Grass cutting blade for a brush cutter|
    CN104139460A|2014-06-16|2014-11-12|南光日|Carbon-diamond cutting head|DE202020104515U1|2020-08-05|2020-10-07|Werkzeugtechnik Niederstetten GmbH & Co. KG|Blade for rotating knives and corn headers|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50376/2017A|AT519562B1|2017-05-09|2017-05-09|Saw blade for a saw for cutting stalky stalks|ATA50376/2017A| AT519562B1|2017-05-09|2017-05-09|Saw blade for a saw for cutting stalky stalks|
    EP18169146.0A| EP3401048A1|2017-05-09|2018-04-25|Saw blade for a saw for cutting stemular stalks|
    US15/975,161| US10668547B2|2017-05-09|2018-05-09|Saw blade for a saw cutting stalk crops|
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