EP3545169A1 - Hard metal insert for a round shank chisel - Google Patents

Hard metal insert for a round shank chisel

Info

Publication number
EP3545169A1
EP3545169A1 EP17811866.7A EP17811866A EP3545169A1 EP 3545169 A1 EP3545169 A1 EP 3545169A1 EP 17811866 A EP17811866 A EP 17811866A EP 3545169 A1 EP3545169 A1 EP 3545169A1
Authority
EP
European Patent Office
Prior art keywords
longitudinal direction
ribs
round shank
shank chisel
chisel
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.)
Granted
Application number
EP17811866.7A
Other languages
German (de)
French (fr)
Other versions
EP3545169B1 (en
Inventor
Gerd Elfgen
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.)
Krueger Susanne
Original Assignee
Power-Technologie 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 Power-Technologie GmbH filed Critical Power-Technologie GmbH
Publication of EP3545169A1 publication Critical patent/EP3545169A1/en
Application granted granted Critical
Publication of EP3545169B1 publication Critical patent/EP3545169B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums

Definitions

  • the invention relates to a cemented carbide insert for a round shank bit on a rotatable roll of a milling machine, comprising a cylindrical body, a conical tip on the body and a soldering surface arranged transversely to a longitudinal direction of the body at a base of the body, and radially from a lateral surface of the body protruding, in the longitudinal direction
  • cemented carbide inserts are used in round shank bits, which have a cylindrical shaft and a conical head, wherein the
  • Hard metal insert with the soldering surface rests on a flat receiving surface on the head and is soldered to the receiving surface with the head.
  • Round shank bits are used in chisel holder on rotatable roller for a
  • Milling machine used form-fitting. Such milling machines are used for abrasive machining, for example, of asphalt or concrete surfaces.
  • US 5,484,191 A discloses such a tungsten carbide cemented carbide insert wherein the tip is formed of a harder material than a cylindrical bottom plate having lateral ribs.
  • the tip and the bottom plate with the ribs are manufactured separately, assembled and soldered with the arranged on the underside of the bottom plate soldering surface on the round shank chisel.
  • US 6,019,434 A discloses in the background of the invention a round shank bit with a carbide insert in the form of a nine-face conical prism instead of the foot narrowing ribs.
  • the invention is based on the object, the material requirements of
  • the ribs of a hard metal insert according to the invention extend in the longitudinal direction up to the soldering surface. The removed material then wears the head of the milling machine during operation
  • the carbide insert according to the invention saves in comparison to the known carbide insert those portions of the (softer) base plate, which remain free in the longitudinal direction upwards and are quickly removed in the milling insert anyway.
  • the ribs of an inventive extend
  • Carbide insert in the longitudinal direction up to the top.
  • the ribs thus prematurely guide the material to be removed into the intermediate spaces between the ribs.
  • Such a cemented carbide insert penetrates into viscous material more easily.
  • a carbide insert according to the invention is radially symmetric in the longitudinal direction (also: rotationally symmetrical). Due to the symmetry of the carbide insert is stressed evenly during operation of the milling machine and thus has a particularly long service life.
  • a round shank bit according to the invention has a hard metal insert according to the invention.
  • Such a Round shank chisel is characterized equally by the above-mentioned advantages of the carbide insert according to the invention.
  • a round shank bit according to the invention has a clamping sleeve made of spring steel which encompasses the shank.
  • the clamping sleeve holds on the one hand axially the round shank chisel and on the other hand allows a rotation of the
  • a round shank chisel according to the invention has a web which extends around the receiving surface and projects over the receiving surface in the longitudinal direction.
  • the circumferential ridge centers the cemented carbide insert for soldering on the receiving surface.
  • Such milling machines with rotating cylindrical milling drums are used, in particular, for the abrasive machining of, for example, asphalt or concrete surfaces.
  • the round shank bits are aligned with the tip pointing outwards on the outer surface of the milling drum and inclined against a radial direction of the roller at the place of installation such that the Longitudinal axis with a circumferential direction of the roller at this location includes an angle between five and 45 degrees and with a circumferential plane through an orbit of the roller at an angle of about seven degrees angle.
  • the carbide tip rolls upon engagement with the material with a proportion of movement in the circumferential direction of the round shank chisel on the material, so that the round shank bit is set in rotation about its longitudinal axis.
  • the rotation of the round shank chisel ensures uniform wear and thus a long service life of the carbide tip.
  • the rotation about its longitudinal axis is impressed on the round shank bit in the form of a torque when rolling off the hard metal tip by the material to be removed. This torque is created by a at the
  • Hard metal tip in their circumferential direction applying force namely by a force acting in the circumferential direction of the carbide tip portion of a total acting in the direction of advancement of the milling drum, so in a circumferential direction of the milling drum on the carbide tip force resulting from the static friction in contact with the material to be removed.
  • bit holder of a roller according to the invention each consist of a welded to the roller base holder and in the
  • Round shank bits are used. On such a roller can be
  • Fig. 1a shows a first carbide insert according to the invention
  • Fig. 9a / b a third invention round shank chisel
  • the first hard metal insert 1 according to the invention shown in FIG. 1 a is produced by powder metallurgy and has a cylindrical body 2, a conical tip 3 on the body 2 and a transverse to a longitudinal direction 4 of the body 2 arranged soldering surface 5 on the foot 6 of the body 2.
  • Carbide insert 1 is in the longitudinal direction 4 radial symmetry.
  • ribs 8 protrude radially to the longitudinal direction 4 and extend in the longitudinal direction 4 as far as the soldering surface 5.
  • a height 9 of the ribs 8 increases, while a radially outwardly facing web surface 10 of the ribs 8 is steadily narrower.
  • the ribs 8 are not formed in a first region 11 of the body 2. In a second, three times longer area 12, the height 9 increases steadily.
  • the holder 13 shown in Figure 1 b made of structural steel has a cylindrical
  • Shaft 14 which engages around a clamping sleeve 15 made of spring steel.
  • a conical head 16 of the holder 13 On a conical head 16 of the holder 13, a flat receiving surface 17 is formed, around which a web 8 rotates, which projects beyond the receiving surface 17 in the longitudinal direction 4.
  • the first hard metal insert 1 is centered with its soldering surface 5 by means of the web 18 on the receiving surface 17 and inserted between the soldering surface 5 and
  • Such invention round shank chisel 19 are - as shown schematically in Figures 3a / b - first by means of the clamping sleeve 15 in
  • Circumferential direction 24 of the roller 22 each have an angle 25 between 5 and 45 angle degree and with a circumferential plane 26 through an orbit of the roller at an angle "/ of about 7 angular degrees.
  • the ribs 8 of the cemented carbide insert 1 divide the abraded material (eg concrete or asphalt) and guide it in the longitudinal direction 4 along the cemented carbide insert 1 in the spaces 28 between the fins 8 the head 16 of the holder.
  • Figures 4a / b show a typical wear pattern of the first
  • Round shank chisel 19 The abraded material flowing along the hard metal insert 1 strikes the much softer head 16 of the holder 13 and carries its receiving surface 17 and the surrounding web 18 and the underlying material such that the ribs 8 and the
  • Carbide insert 29 has three ribs 30.
  • the second round shank bit 31 according to the invention shown in FIGS. 6a / b has the second hard metal insert 29.
  • the second corresponds
  • Carbide insert 29 the first carbide insert 1 and the second
  • Round shank chisel 31 the first round shank chisel 19.
  • the figures 7a / b show a typical wear pattern of the second round shank chisel 31st
  • the ribs 32 and the intermediate spaces 33 between the ribs 32 extend at the third hard metal insert 34 according to the invention shown in FIGS. 8a / b over the first region 35 of constant height 36 up to its tip 37.
  • the third one shown in FIGS. 9a / b Round shank bit 38 according to the invention has the third carbide insert 34.
  • the third hard metal insert 34 corresponds to the first carbide insert 1 and the third round shank chisel 38 to the first round shank chisel 19.
  • FIGS. 10 a / b show a typical wear pattern of the third round shank chisel 38.
  • the third hard metal insert 34 is characterized by an improved cutting edge during milling. In the figures are

Abstract

The invention relates to a hard metal insert (1) for a round shank chisel on a rotatable roller of a milling machine, having a cylindrical body (2), a conical tip (3) on the body (2), a soldering surface (5) which is provided on a base (6) of the body (2) and is arranged transverse to a longitudinal direction (4) of the body (2), and ribs (8) which project radially from a lateral surface (7) of the body (2) and extend in the longitudinal direction (4), wherein a height (9) of the ribs (8) above the body (2) increases in the longitudinal direction (4) towards the base (6) and a radially outwards facing web surface (10) of the ribs (8) narrows steadily in the longitudinal direction (4) towards the base (6). In order to reduce the material required for the hard metal insert (1), the invention proposes that the ribs (8) extend in the longitudinal direction (4) all the way to the soldering surface (5).

Description

Hartmetalleinsatz für einen Rundschaftmeißel  Carbide insert for a round shank chisel
Die Erfindung betrifft einen Hartmetalleinsatz für einen Rundschaftmeißel an einer rotierbaren Walze einer Fräsmaschine, mit einem zylindrischen Korpus, einer konischen Spitze an dem Korpus und einer quer zu einer Längsrichtung des Korpus angeordneten Lötfläche an einem Fuß des Korpus, und mit radial aus einer Mantelfläche des Korpus vorstehenden, sich in der Längsrichtung  The invention relates to a cemented carbide insert for a round shank bit on a rotatable roll of a milling machine, comprising a cylindrical body, a conical tip on the body and a soldering surface arranged transversely to a longitudinal direction of the body at a base of the body, and radially from a lateral surface of the body protruding, in the longitudinal direction
erstreckenden Rippen, wobei eine Höhe der Rippen über dem Korpus in der Längsrichtung zu dem Fuß hin ansteigt und eine radial nach Außen weisende Stegfläche der Rippen in der Längsrichtung zu dem Fuß hin stetig schmaler wird. extending ribs, wherein a height of the ribs above the body in the longitudinal direction increases toward the foot and a radially outwardly facing land surface of the ribs in the longitudinal direction to the foot is steadily narrower.
Solche Hartmetalleinsätze kommen in Rundschaftmeißeln zum Einsatz, die einen zylindrischen Schaft und einen konischen Kopf aufweisen, wobei der Such cemented carbide inserts are used in round shank bits, which have a cylindrical shaft and a conical head, wherein the
Hartmetalleinsatz mit der Lötfläche auf einer ebenen Aufnahmefläche an dem Kopf anliegt und an der Aufnahmefläche mit dem Kopf verlötet ist. Diese Hard metal insert with the soldering surface rests on a flat receiving surface on the head and is soldered to the receiving surface with the head. These
Rundschaftmeißel werden in Meißelhalter auf rotierbaren Walze für eine Round shank bits are used in chisel holder on rotatable roller for a
Fräsmaschine formschlüssig eingesetzt. Solche Fräsmaschinen werden zur abrasiven Bearbeitung beispielsweise von Asphalt- oder Betonflächen eingesetzt. Milling machine used form-fitting. Such milling machines are used for abrasive machining, for example, of asphalt or concrete surfaces.
US 5,484,191 A offenbart einen solchen Hartmetalleinsatz aus Wolframkarbid, wobei die Spitze aus einem härteren Material geformt ist als eine zylindrische Bodenplatte mit seitlichen Rippen. Die Spitze und die Bodenplatte mit den Rippen werden separat gefertigt, zusammengefügt und mit der an der Unterseite der Bodenplatte angeordneten Lötfläche auf den Rundschaftmeißel gelötet. US 5,484,191 A discloses such a tungsten carbide cemented carbide insert wherein the tip is formed of a harder material than a cylindrical bottom plate having lateral ribs. The tip and the bottom plate with the ribs are manufactured separately, assembled and soldered with the arranged on the underside of the bottom plate soldering surface on the round shank chisel.
US 6,019,434 A offenbart im Hintergrund der Erfindung einen Rundschaftmeißel mit einem Hartmetalleinsatz in Form eines neunflächigen, konischen Prismas anstelle zum Fuß schmaler werdender Rippen. US 6,019,434 A discloses in the background of the invention a round shank bit with a carbide insert in the form of a nine-face conical prism instead of the foot narrowing ribs.
Weitere Hartmetalleinsätze sind aus US 5,131 ,725 A und US 5,551 ,760 A bekannt. Die nach Außen weisenden Stegflächen der Rippen der bekannten Hartmetalleinsätze weisen in der Längsrichtung eine mindestens konstante Breite auf. Die Rippen teilen das im Betrieb der Fräsmaschine abgetragene Material und leiten es in der Längsrichtung an dem Hartmetalleinsatz entlang. Aufgabe Other carbide inserts are known from US 5,131, 725 A and US 5,551, 760 A. The outwardly facing web surfaces of the ribs of the known hard metal inserts have an at least constant width in the longitudinal direction. The ribs divide the material removed during operation of the milling machine and guide it in the longitudinal direction along the hard metal insert. task
Der Erfindung liegt die Aufgabe zugrunde, den Materialbedarf des  The invention is based on the object, the material requirements of
Hartmetalleinsatzes zu verringern Reduce carbide insert
Lösung solution
Ausgehend von den bekannten Hartmetalleinsätzen wird nach der Erfindung vorgeschlagen, dass die Rippen eines erfindungsgemäßen Hartmetalleinsatzes sich in der Längsrichtung bis zu der Lötfläche erstrecken. Das abgetragene Material verschleißt dann im Betrieb der Fräsmaschine den Kopf des  Starting from the known hard metal inserts is proposed according to the invention that the ribs of a hard metal insert according to the invention extend in the longitudinal direction up to the soldering surface. The removed material then wears the head of the milling machine during operation
Rundschaftmeißels unterhalb des Hartmetalleinsatzes derart, dass sich die Rippen in den Kopf des Rundschaftmeißels fortsetzen. Der erfindungsgemäße Hartmetalleinsatz erspart im Vergleich zu dem bekannten Hartmetalleinsatz diejenigen Abschnitte der (weicheren) Bodenplatte, die in der Längsrichtung nach oben frei bleiben und im Fräseinsatz ohnehin schnell abgetragen werden. Round shank chisel below the hard metal insert such that the ribs continue into the head of the round shank chisel. The carbide insert according to the invention saves in comparison to the known carbide insert those portions of the (softer) base plate, which remain free in the longitudinal direction upwards and are quickly removed in the milling insert anyway.
Vorzugsweise erstrecken sich die Rippen eines erfindungsgemäßen  Preferably, the ribs of an inventive extend
Hartmetalleinsatzes in der Längsrichtung bis zu der Spitze. Die Rippen leiten so im Betrieb der Fräsmaschine bereits frühzeitig das abzutragende Material in die Zwischenräume zwischen den Rippen. Carbide insert in the longitudinal direction up to the top. During operation of the milling machine, the ribs thus prematurely guide the material to be removed into the intermediate spaces between the ribs.
Vorzugsweise ist die Höhe der Rippen eines erfindungsgemäßen  Preferably, the height of the ribs of an inventive
Hartmetalleinsatzes in der Längsrichtung ausgehend von der Spitze zu dem Fuß hin in einem ersten Bereich des Korpus konstant und steigt in einem Carbide insert in the longitudinal direction, starting from the tip to the foot in a first region of the body constant and increases in one
anschließenden zweiten Bereich bis zu der Lötfläche an, wobei der zweite Bereich zwei- bis viermal länger als der erste Bereich ist. Ein solcher Hartmetalleinsatz dringt leichter in zähes Material ein. subsequent second region to the soldering surface, wherein the second region is two to four times longer than the first region. Such a cemented carbide insert penetrates into viscous material more easily.
Vorzugsweise ist ein erfindungsgemäßer Hartmetalleinsatz in der Längsrichtung radiärsymmetrisch (auch: drehsymmetrisch). Durch die Symmetrie wird der Hartmetalleinsatz im Betrieb der Fräsmaschine gleichmäßig beansprucht und weist dadurch eine besonders hohe Standzeit auf.  Preferably, a carbide insert according to the invention is radially symmetric in the longitudinal direction (also: rotationally symmetrical). Due to the symmetry of the carbide insert is stressed evenly during operation of the milling machine and thus has a particularly long service life.
Ausgehend vom bekannten Stand der Technik weist ein erfindungsgemäßer Rundschaftmeißel einen erfindungsgemäßen Hartmetalleinsatz auf. Ein solcher Rundschaftmeißel zeichnet sich gleichermaßen durch die vorstehend genannten Vorteile des erfindungsgemäßen Hartmetalleinsatzes aus. Starting from the known state of the art, a round shank bit according to the invention has a hard metal insert according to the invention. Such a Round shank chisel is characterized equally by the above-mentioned advantages of the carbide insert according to the invention.
Vorzugsweise weist ein erfindungsgemäßer Rundschaftmeißel eine den Schaft umgreifende Spannhülse aus Federstahl auf. Die Spannhülse hält einerseits axial den Rundschaftmeißel und erlaubt andererseits eine Rotation des Preferably, a round shank bit according to the invention has a clamping sleeve made of spring steel which encompasses the shank. The clamping sleeve holds on the one hand axially the round shank chisel and on the other hand allows a rotation of the
Rundschaftmeißels um seine Längsachse im Meißelhalter. Round shank chisel around its longitudinal axis in the chisel holder.
Vorzugsweise weist ein erfindungsgemäßer Rundschaftmeißel einen um die Aufnahmefläche umlaufenden, die Aufnahmefläche in der Längsrichtung überragenden Steg auf. Der umlaufende Steg zentriert den Hartmetalleinsatz zum Löten auf der Aufnahmefläche. Preferably, a round shank chisel according to the invention has a web which extends around the receiving surface and projects over the receiving surface in the longitudinal direction. The circumferential ridge centers the cemented carbide insert for soldering on the receiving surface.
Ausgehend vom bekannten Stand der Technik weist eine erfindungsgemäße Walze für eine Fräsmaschine erfindungsgemäße Rundschaftmeißel auf. Eine solche Walze zeichnet sich gleichermaßen durch die vorstehend genannten Vorteile des erfindungsgemäßen Rundschaftmeißels aus. Based on the known state of the art, a roll according to the invention for a milling machine according to the invention on round pick. Such a roller is characterized equally by the aforementioned advantages of the round shank bit according to the invention.
Solche Fräsmaschinen mit rotierenden zylindrischen Fräswalzen kommen insbesondere zur abrasiven Bearbeitung beispielsweise von Asphalt- oder Betonflächen zum Einsatz: Die Rundschaftmeißel sind mit der Spitze nach Außen weisend auf der Mantelfläche der Fräswalze und gegen eine Radialrichtung der Walze am Ort der Montage derart geneigt ausgerichtet, dass die Längsachse mit einer Umfangsrichtung der Walze an diesem Ort einen Winkel zwischen fünf und 45 Winkelgrad und mit einer Umfangsebene durch einen Umkreis der Walze einen Winkel von etwa sieben Winkelgrad einschließt. Such milling machines with rotating cylindrical milling drums are used, in particular, for the abrasive machining of, for example, asphalt or concrete surfaces. The round shank bits are aligned with the tip pointing outwards on the outer surface of the milling drum and inclined against a radial direction of the roller at the place of installation such that the Longitudinal axis with a circumferential direction of the roller at this location includes an angle between five and 45 degrees and with a circumferential plane through an orbit of the roller at an angle of about seven degrees angle.
Infolge der Neigung gegenüber der Umfangsebene wälzt die Hartmetallspitze beim Eingriff in das Material mit einem Bewegungsanteil in Umfangsrichtung des Rundschaftmeißels auf dem Material ab, so dass der Rundschaftmeißel um seine Längsachse in Rotation versetzt wird. Die Rotation des Rundschaftmeißels gewährleistet eine gleichmäßige Abnutzung und damit eine hohe Standzeit der Hartmetallspitze. Die Drehung um seine Längsachse wird dem Rundschaftmeißel in Form eines Drehmoments beim Abwälzen der Hartmetallspitze durch das abzugetragene Material aufgeprägt. Dieses Drehmoment entsteht durch eine an der As a result of the inclination relative to the peripheral plane, the carbide tip rolls upon engagement with the material with a proportion of movement in the circumferential direction of the round shank chisel on the material, so that the round shank bit is set in rotation about its longitudinal axis. The rotation of the round shank chisel ensures uniform wear and thus a long service life of the carbide tip. The rotation about its longitudinal axis is impressed on the round shank bit in the form of a torque when rolling off the hard metal tip by the material to be removed. This torque is created by a at the
Hartmetallspitze in ihrer Umfangsrichtung ansetzende Kraft, nämlich durch einen in der Umfangsrichtung der Hartmetallspitze wirkenden Anteil einer insgesamt in der Vortriebsrichtung der Fräswalze, also in einer Umfangsrichtung der Fräswalze an der Hartmetallspitze angreifenden Kraft, die aus der Haftreibung im Kontakt mit dem abzutragenden Material resultiert. Hard metal tip in their circumferential direction applying force, namely by a force acting in the circumferential direction of the carbide tip portion of a total acting in the direction of advancement of the milling drum, so in a circumferential direction of the milling drum on the carbide tip force resulting from the static friction in contact with the material to be removed.
Vorzugsweise bestehen die Meißelhalter einer erfindungsgemäßen Walze jeweils aus einem mit der Walze verschweißten Grundhalter und einem in den  Preferably, the bit holder of a roller according to the invention each consist of a welded to the roller base holder and in the
Grundhalter formschlüssig eingesetzten Wechselhalter, in den die Basic holder positively inserted change holder, in which the
Rundschaftmeißel eingesetzt sind. An einer solchen Walze lassen sich Round shank bits are used. On such a roller can be
verschlissene Wechselhalter einfach auswechseln. simply replace worn changeover holder.
Ausführungsbeispiele embodiments
Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen erläutert. Es zeigen  The invention will be explained below with reference to exemplary embodiments. Show it
Fig. 1a einen ersten erfindungsgemäßen Hartmetalleinsatz und  Fig. 1a shows a first carbide insert according to the invention and
Fig. 1b einen Halter für diesen Hartmetalleinsatz,  1b shows a holder for this carbide insert,
Fig. 2a/b einen ersten erfindungsgemäßen Rundschaftmeißel,  2a / b a first round shank bit according to the invention,
Fig. 3a/b eine erste erfindungsgemäße Walze,  3a / b a first roller according to the invention,
Fig. 4a/b ein Verschleißbild des ersten Rundschaftmeißels,  4a / b a wear pattern of the first round shank chisel,
Fig. 5a/b einen zweiten erfindungsgemäßen Hartmetalleinsatz,  5a / b a second cemented carbide insert according to the invention,
Fig. 6a/b einen zweiten erfindungsgemäßen Rundschaftmeißel und  Fig. 6a / b, a second inventive round shank bit and
Fig. 7a/b ein Verschleißbild des zweiten Rundschaftmeißels,  7a / b a wear pattern of the second round shank chisel,
Fig. 8a/b einen dritten erfindungsgemäßen Hartmetalleinsatz,  8a / b a third hard metal insert according to the invention,
Fig. 9a/b einen dritten erfindungsgemäßen Rundschaftmeißel und  Fig. 9a / b a third invention round shank chisel and
Fig. 10a/b ein Verschleißbild des dritten Rundschaftmeißels,  10a / b a wear pattern of the third round shank chisel,
Der in Figur 1a gezeigte erste erfindungsgemäße Hartmetalleinsatz 1 ist pulvermetallurgisch gefertigt und weist einen zylindrischen Korpus 2, eine konische Spitze 3 an dem Korpus 2 und eine quer zu einer Längsrichtung 4 des Korpus 2 angeordnete Lötfläche 5 am Fuß 6 des Korpus 2 auf. Der erste The first hard metal insert 1 according to the invention shown in FIG. 1 a is produced by powder metallurgy and has a cylindrical body 2, a conical tip 3 on the body 2 and a transverse to a longitudinal direction 4 of the body 2 arranged soldering surface 5 on the foot 6 of the body 2. The first
Hartmetalleinsatz 1 ist in der Längsrichtung 4 radiärsymmetrisch. Carbide insert 1 is in the longitudinal direction 4 radial symmetry.
Aus einer Mantelfläche 7 des Korpus 2 stehen radial zur Längsrichtung 4 sechs Rippen 8 hervor, die sich in der Längsrichtung 4 bis zu der Lötfläche 5 erstrecken. In der Längsrichtung 4 zu dem Fuß 6 hin steigt eine Höhe 9 der Rippen 8 an, während eine radial nach Außen weisende Stegfläche 10 der Rippen 8 stetig schmaler wird. From a lateral surface 7 of the body 2, six ribs 8 protrude radially to the longitudinal direction 4 and extend in the longitudinal direction 4 as far as the soldering surface 5. In the longitudinal direction 4 to the foot 6 towards a height 9 of the ribs 8 increases, while a radially outwardly facing web surface 10 of the ribs 8 is steadily narrower.
In der Längsrichtung 4 sind ausgehend von der Spitze 3 zu dem Fuß 6 hin in einem ersten Bereich 11 des Korpus 2 die Rippen 8 nicht ausgebildet. In einem zweiten, dreimal längeren Bereich 12 steigt die Höhe 9 stetig an. In the longitudinal direction 4, starting from the tip 3 towards the foot 6, the ribs 8 are not formed in a first region 11 of the body 2. In a second, three times longer area 12, the height 9 increases steadily.
Der in Figur 1 b gezeigte Halter 13 aus Baustahl weist einen zylindrischen The holder 13 shown in Figure 1 b made of structural steel has a cylindrical
Schaft 14 auf, den eine Spannhülse 15 aus Federstahl umgreift. An einem konischen Kopf 16 des Halters 13 ist eine ebene Aufnahmefläche 17 ausgebildet, um die ein Steg 8 umläuft, der die Aufnahmefläche 17 in der Längsrichtung 4 überragt. Shaft 14, which engages around a clamping sleeve 15 made of spring steel. On a conical head 16 of the holder 13, a flat receiving surface 17 is formed, around which a web 8 rotates, which projects beyond the receiving surface 17 in the longitudinal direction 4.
Der erste Hartmetalleinsatz 1 wird mit seiner Lötfläche 5 mittels des Stegs 18 auf der Aufnahmefläche 17 zentriert eingesetzt und zwischen Lötfläche 5 und The first hard metal insert 1 is centered with its soldering surface 5 by means of the web 18 on the receiving surface 17 and inserted between the soldering surface 5 and
Aufnahmefläche 17 mit dem Halter 13 zu dem in den Figuren 2a/b gezeigten ersten erfindungsgemäßen Rundschaftmeißel 19 hartverlötet. Receiving surface 17 with the holder 13 brazed to the first inventive round shank chisel 19 shown in Figures 2a / b.
Solche erfindungsgemäßen Rundschaftmeißel 19 werden - wie in den Figuren 3a/b schematisch dargestellt - zunächst mittels der Spannhülse 15 in Such invention round shank chisel 19 are - as shown schematically in Figures 3a / b - first by means of the clamping sleeve 15 in
Wechselhalter 20 eingepresst und mit dem Wechselhalter 20 formschlüssig in einen auf einer Mantelfläche 21 einer erfindungsgemäßen Walze 22 Change holder 20 pressed and form fit with the change holder 20 in a on a lateral surface 21 of a roller 22 according to the invention
verschweißten Grundhalter 23 eingesetzt. In der montierten Position weisen die Rundschaftmeißel 19 mit ihrer Spitze 3 nach Außen. Die Längsrichtungen 4 der Hartmetalleinsätze 1 und der Rundschaftmeißel 19 schließen mit einer welded base holder 23 used. In the mounted position, the round shank chisel 19 with its tip 3 to the outside. The longitudinal directions 4 of the carbide inserts 1 and the round shank chisel 19 conclude with a
Umfangsrichtung 24 der Walze 22 jeweils einen Winkel 25 zwischen 5 und 45 Winkelgrad und mit einer Umfangsebene 26 durch einen Umkreis der Walze einen Winkel„/ von etwa 7 Winkelgrad ein. Circumferential direction 24 of the roller 22 each have an angle 25 between 5 and 45 angle degree and with a circumferential plane 26 through an orbit of the roller at an angle "/ of about 7 angular degrees.
Im Betrieb der erfindungsgemäßen Walze 22 auf einer (nicht dargestellten) Fräsmaschine teilen die Rippen 8 des Hartmetalleinsatzes 1 das abgetragene Material (beispielsweise Beton oder Asphalt) und leiten es in der Längsrichtung 4 an dem Hartmetalleinsatz 1 entlang in den Zwischenräumen 28 zwischen den Rippen 8 zu dem Kopf 16 des Halters 3. In operation of the inventive roller 22 on a milling machine (not shown), the ribs 8 of the cemented carbide insert 1 divide the abraded material (eg concrete or asphalt) and guide it in the longitudinal direction 4 along the cemented carbide insert 1 in the spaces 28 between the fins 8 the head 16 of the holder. 3
Die Figuren 4a/b zeigen ein typisches Verschleißbild des ersten Figures 4a / b show a typical wear pattern of the first
Rundschaftmeißels 19: Das an dem Hartmetalleinsatz 1 entlang strömende abgetragene Material trifft auf den deutlich weicheren Kopf 16 des Halters 13 und trägt dessen Aufnahmefläche 17 und den dort umlaufenden Steg 18 sowie das darunter liegende Material derart ab, dass sich die Rippen 8 und die Round shank chisel 19: The abraded material flowing along the hard metal insert 1 strikes the much softer head 16 of the holder 13 and carries its receiving surface 17 and the surrounding web 18 and the underlying material such that the ribs 8 and the
Zwischenräume 28 zwischen diesen im Halter 13 nahtlos fortsetzen. Intermediate spaces 28 between them in the holder 13 continue seamlessly.
Der in den Figuren 5a/b dargestellte zweite erfindungsgemäße The second invention shown in Figures 5a / b
Hartmetalleinsatz 29 weist drei Rippen 30 auf. Der in den Figuren 6a/b dargestellte zweite erfindungsgemäße Rundschaftmeißel 31 weist den zweiten Hartmetalleinsatz 29 auf. Darüber hinaus entspricht der zweite Carbide insert 29 has three ribs 30. The second round shank bit 31 according to the invention shown in FIGS. 6a / b has the second hard metal insert 29. In addition, the second corresponds
Hartmetalleinsatz 29 dem ersten Hartmetalleinsatz 1 und der zweite Carbide insert 29 the first carbide insert 1 and the second
Rundschaftmeißel 31 dem ersten Rundschaftmeißel 19. Die Figuren 7a/b zeigen ein typisches Verschleißbild des zweiten Rundschaftmeißels 31. Round shank chisel 31 the first round shank chisel 19. The figures 7a / b show a typical wear pattern of the second round shank chisel 31st
Die Rippen 32 und die Zwischenräume 33 zwischen den Rippen 32 erstrecken sich an dem in den Figuren 8a/b dargestellten dritten erfindungsgemäßen Hartmetalleinsatz 34 über den ersten Bereich 35 mit konstanter Höhe 36 bis zu dessen Spitze 37. Der in den Figuren 9a/b dargestellte dritte erfindungsgemäße Rundschaftmeißel 38 weist den dritten Hartmetalleinsatz 34 auf. Darüber hinaus entspricht der dritte Hartmetalleinsatz 34 dem ersten Hartmetalleinsatz 1 und der dritte Rundschaftmeißel 38 dem ersten Rundschaftmeißel 19. Die Figuren 10a/b zeigen ein typisches Verschleißbild des dritten Rundschaftmeißels 38. Der dritte Hartmetalleinsatz 34 zeichnet sich durch eine verbesserte Spitzenbildung beim Fräsen aus. In den Figuren sindThe ribs 32 and the intermediate spaces 33 between the ribs 32 extend at the third hard metal insert 34 according to the invention shown in FIGS. 8a / b over the first region 35 of constant height 36 up to its tip 37. The third one shown in FIGS. 9a / b Round shank bit 38 according to the invention has the third carbide insert 34. In addition, the third hard metal insert 34 corresponds to the first carbide insert 1 and the third round shank chisel 38 to the first round shank chisel 19. FIGS. 10 a / b show a typical wear pattern of the third round shank chisel 38. The third hard metal insert 34 is characterized by an improved cutting edge during milling. In the figures are
1 Hartmetalleinsatz1 carbide insert
2 Korpus 2 corpus
3 Spitze  3 top
4 Längsrichtung 4 longitudinal direction
5 Lötfläche 5 soldering surface
6 Fuß  6 feet
7 Mantelfläche 7 lateral surface
8 Rippe 8 rib
9 Höhe  9 height
10 Stegfläche  10 land area
11 erster Bereich 11 first area
12 zweiter Bereich12 second area
13 Halter 13 holders
14 Schaft  14 shaft
15 Spannhülse 15 clamping sleeve
16 Kopf 16 head
17 Aufnahmefläche 17 pickup area
18 Steg 18 footbridge
19 Rundschaftmeißel 19 round shank chisel
20 Wechselhalter20 change holders
21 Mantelfläche21 lateral surface
22 Walze 22 roller
23 Grundhalter 23 basic holder
24 Umfangsrichtung24 circumferential direction
25 Winkel 25 angles
26 Umfangsebene 26 perimeter level
27 Winkel 27 angles
28 Zwischenraum 28 space
29 Hartmetalleinsatz29 carbide insert
30 Rippe Rundschaftmeißel Rippe 30 rib Round shank rib
Zwischenraum Hartmetalleinsatz erster Bereich Höhe Interspace carbide insert first area height
Spitze top
Rundschaftmeißel Attack cutting tools

Claims

Patentansprüche claims
1. Hartmetalleinsatz (1 , 29, 34) für einen Rundschaftmeißel (19, 31 , 38) an einer rotierbaren Walze (22) einer Fräsmaschine, mit einem zylindrischen Korpus (2), einer konischen Spitze (3, 33) an dem Korpus (2) und einer quer zu einer Längsrichtung (4) des Korpus (2) angeordneten Lötfläche (5) an einem Fuß (6) des Korpus (2), und mit radial aus einer Mantelfläche (7) des Korpus (2) vorstehenden, sich in der Längsrichtung (4) erstreckenden Rippen (8, 30, 32), wobei eine Höhe (9) der Rippen (8, 30, 32) über dem Korpus (2) in der Längsrichtung (4) zu dem Fuß (6) hin ansteigt und eine radial nach Außen weisende Stegfläche (10) der Rippen (8, 30, 32) in der Längsrichtung (4) zu dem Fuß (6) hin stetig schmaler wird, dadurch gekennzeichnet, dass die Rippen (8, 30, 32) sich in der Längsrichtung (4) bis zu der Lötfläche (5) erstrecken.  A carbide insert (1, 29, 34) for a round shank chisel (19, 31, 38) on a rotatable roller (22) of a milling machine, with a cylindrical body (2), a conical tip (3, 33) on the body ( 2) and a transverse to a longitudinal direction (4) of the body (2) arranged soldering surface (5) on a foot (6) of the body (2), and with radially from a lateral surface (7) of the body (2) above, itself in the longitudinal direction (4) extending ribs (8, 30, 32), wherein a height (9) of the ribs (8, 30, 32) above the body (2) in the longitudinal direction (4) to the foot (6) out rises and a radially outwardly facing land surface (10) of the ribs (8, 30, 32) in the longitudinal direction (4) to the foot (6) towards continuously narrower, characterized in that the ribs (8, 30, 32) extending in the longitudinal direction (4) to the soldering surface (5).
2. Hartmetalleinsatz (34) nach dem vorgenannten Anspruch, dadurch 2. carbide insert (34) according to the preceding claim, characterized
gekennzeichnet, dass die Rippen (32) sich in der Längsrichtung (4) bis zu der Spitze (33) erstrecken.  characterized in that the ribs (32) extend in the longitudinal direction (4) to the tip (33).
3. Hartmetalleinsatz (34) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass die Höhe (36) der Rippen (32) in der Längsrichtung (4) ausgehend von der Spitze (33) zu dem Fuß (6) hin in einem ersten 3. carbide insert (34) according to any one of the preceding claims, characterized in that the height (36) of the ribs (32) in the longitudinal direction (4) starting from the tip (33) to the foot (6) out in a first
Bereich (1 1) des Korpus (2) konstant ist und in einem anschließenden zweiten Bereich ( 2) bis zu der Lötfläche (5) ansteigt, wobei der zweite Bereich (12) zwei- bis viermal länger als der erste Bereich (1 1) ist.  Region (1 1) of the body (2) is constant and in a subsequent second region (2) up to the soldering surface (5) increases, the second region (12) two to four times longer than the first region (1 1) is.
4. Hartmetalleinsatz (1 , 29, 34) nach einem der vorgenannten Ansprüche, 4. carbide insert (1, 29, 34) according to one of the preceding claims,
dadurch gekennzeichnet, dass der Hartmetalleinsatz (1 , 29, 34) in der Längsrichtung (4) radiärsymmetrisch ist.  characterized in that the hard metal insert (1, 29, 34) in the longitudinal direction (4) is radially symmetrical.
5. Rundschaftmeißel (19, 31 , 38) mit einem zylindrischen Schaft (14) und einem konischen Kopf (16), und mit einem Hartmetalleinsatz (1 , 29, 34) nach einem der vorgenannten Ansprüche, wobei der Hartmetalleinsatz (1 , 29, 34) mit der Lötfläche (5) auf einer ebenen Aufnahmefläche (17) an dem Kopf (16) anliegt und an der Aufnahmefläche (17) mit dem Kopf (16) verlötet ist. 5. round shank chisel (19, 31, 38) with a cylindrical shank (14) and a conical head (16), and with a hard metal insert (1, 29, 34) according to one of the preceding claims, wherein the carbide insert (1, 29, 34) with the soldering surface (5) on a flat receiving surface (17) against the head (16) and is soldered to the receiving surface (17) with the head (16).
6. Rundschaftmeißel (19, 31 , 38) nach dem vorgenannten Anspruch, gekennzeichnet durch eine den Schaft (14) umgreifende Spannhülse (15) aus Federstahl. 6. round shank chisel (19, 31, 38) according to the preceding claim, characterized by a shaft (14) embracing clamping sleeve (15) made of spring steel.
7. Rundschaftmeißel (19, 31 , 38) nach einem der Ansprüche 5 oder 6, 7. round shank chisel (19, 31, 38) according to any one of claims 5 or 6,
gekennzeichnet durch einen um die Aufnahmefläche (17) umlaufenden, die Aufnahmefläche (17) in der Längsrichtung (4) überragenden Steg (18).  characterized by a around the receiving surface (17) encircling, the receiving surface (17) in the longitudinal direction (4) projecting web (18).
8. Rotierbare Walze (22) für eine Fräsmaschine mit Meißelhaltern, in die 8. Rotatable roller (22) for a milling machine with chisel holders, in the
Rundschaftmeißel (19, 31 , 38) nach einem der Ansprüche 6 bis 8  Round shank chisel (19, 31, 38) according to one of claims 6 to 8
formschlüssig eingesetzt sind.  are used positively.
9. Rotierbare Walze (22) nach dem vorgenannten Anspruch, dadurch 9. Rotatable roller (22) according to the preceding claim, characterized
gekennzeichnet, dass die Meißelhalter jeweils aus einem mit der Walze (22) verschweißten Grundhalter (23) und einem in den Grundhalter (23) formschlüssig eingesetzten Wechselhalter (20) bestehen, in den die  in that the bit holders each consist of a base holder (23) welded to the roller (22) and a change holder (20) inserted in a form-fitting manner into the base holder (23) into which the
Rundschaftmeißel (19, 31 , 38) eingesetzt sind.  Round shank chisel (19, 31, 38) are used.
EP17811866.7A 2016-11-24 2017-11-22 Hard metal insert for a round shank chisel Active EP3545169B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016122693.9A DE102016122693A1 (en) 2016-11-24 2016-11-24 Carbide insert for a round shank chisel
PCT/EP2017/080013 WO2018095955A1 (en) 2016-11-24 2017-11-22 Hard metal insert for a round shank chisel

Publications (2)

Publication Number Publication Date
EP3545169A1 true EP3545169A1 (en) 2019-10-02
EP3545169B1 EP3545169B1 (en) 2021-01-27

Family

ID=60654925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17811866.7A Active EP3545169B1 (en) 2016-11-24 2017-11-22 Hard metal insert for a round shank chisel

Country Status (4)

Country Link
EP (1) EP3545169B1 (en)
CN (1) CN110249110B (en)
DE (1) DE102016122693A1 (en)
WO (1) WO2018095955A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11098584B2 (en) 2018-11-15 2021-08-24 Caterpillar Inc. Carbide cutter bit with ribbed sides and conical tip

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US5324098A (en) * 1992-12-17 1994-06-28 Kennametal Inc. Cutting tool having hard tip with lobes
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CN2871793Y (en) * 2005-09-14 2007-02-21 张玉英 Double-blade sharp borebit
DE102007007156A1 (en) * 2007-02-09 2008-08-14 Gerd Elfgen Carbide tip for a round shank chisel
DE102008045825B3 (en) * 2008-09-05 2010-05-27 Wirtgen Gmbh Chisel holder for a cutting machine, road milling machine, Suface miner or the like
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Also Published As

Publication number Publication date
CN110249110B (en) 2021-03-23
DE102016122693A1 (en) 2018-05-24
EP3545169B1 (en) 2021-01-27
WO2018095955A1 (en) 2018-05-31
CN110249110A (en) 2019-09-17

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