EP1574309A1 - Ciseau pour une fraise - Google Patents

Ciseau pour une fraise Download PDF

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Publication number
EP1574309A1
EP1574309A1 EP05004601A EP05004601A EP1574309A1 EP 1574309 A1 EP1574309 A1 EP 1574309A1 EP 05004601 A EP05004601 A EP 05004601A EP 05004601 A EP05004601 A EP 05004601A EP 1574309 A1 EP1574309 A1 EP 1574309A1
Authority
EP
European Patent Office
Prior art keywords
chisel
head
bit
holder
shank
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Withdrawn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
EP05004601A
Other languages
German (de)
English (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1574309A1 publication Critical patent/EP1574309A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
    • B28D1/188—Tools therefor, e.g. having exchangeable cutter bits with exchangeable cutter bits or cutter segments
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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

Definitions

  • the invention relates to a bit for connection to a rotatable roller of a Milling device for removing material, wherein the bit by means of a holder on the roller halterbar and removable from this and has a chisel head, with a Carbide contact element is provided which in the operation of the chisel with the to be removed material comes into contact and wherein at least the contact element is rotatable relative to the holder about an axis, the at least one component perpendicular to the axis of rotation of the roller, wherein the chisel head of a Chisel shaft connectable to the holder is removable.
  • the chisel axles are essentially in the radial direction with their longitudinal axis Rotation direction inclined.
  • the rotating roller In milling operation, the rotating roller is perpendicular to her Rotation axis substantially along a material surface method, wherein the a fictitious rolling movement of the rollers resulting movement of the Feed direction of the milling device is opposite. (Conventional milling)
  • the chisel heads grip depending on the elasticity of the material cutting, cutting or beating into the material to be removed.
  • the procedure begins when a bit head is substantially perpendicular to the axis of rotation of the roller located.
  • the rotation of the roller and the feed speed of the milling device add up to a resulting speed of the chisel head first in the Essentially parallel to the surface in the milling direction.
  • shank chisel chisel on a drill shank, which in a bore a holder is inserted.
  • the chisel head with a carbide tip protrudes from the Bore out and lies with a radially from the chisel axis protruding collar on the Holder on.
  • On the cylindrical surface of the drill collar has such Shank bit on a holding element with which the shank bit in the bore is halterbar.
  • Such chisels are mainly known in the field of road rehabilitation. There they are used in road milling where they range up to a few tens some hundreds are mounted by holders on a rotatable roller.
  • Chisels are subject to a high due to the dynamic load during the milling process Wear and must be replaced regularly and usually completely.
  • individual chisels that are subjected to special stress can and must also be replaced.
  • the costs are regular arise, mainly from the acquisition cost of new chisel and from the Costs that cause the downtime of each machine when exchanging tools, together.
  • DE 36 30 444 A1 discloses a chisel made by an elastic Ring is axially supported by the holder.
  • the ring should be on the chisel head cushioning impact forces and thereby the loads on the hard metal contact element effectively reduce the chisel tip, chisel head and holder so the To increase the life of said elements.
  • DE 37 01 905 C1 discloses a special attachment of a chisel a holder by means of a clamping sleeve, which is to ensure that the bit is rotatable and should also be particularly easy to use by hammer blows.
  • a round shank bit which consists of a in a Chisel holder replaceable guided chisel body arranged with a head end Cutting edge exists.
  • the bit body is made of a cutting head receiving the cutting edge and a shaft which fits into a mating recess in the bit head intervenes.
  • the connection of the parts forming the bit body can according to this prior art stick through ceilings, shrink or screws done.
  • GB 2 195 682 A discloses a non-rotatable bit consisting of a drill collar and a chisel head.
  • the chisel shaft points in Connecting portion with the chisel head on a kegelsternpfförmigen end portion, the engages in a correspondingly shaped recess at the base end of the chisel head.
  • a positive connection of the two aforementioned parts by means of a pbianfederärtigen steel pin, which is half in a recess in the drill collar and is half in a recess in the chisel head and back, that is in Area of the chisel head supported by a rubber element and towards the Chisel is biased.
  • a separate version of chisel head and chisel shaft is also from the US 5,261,499 known.
  • the connection of the aforementioned components takes place there by means of a slotted and in the installed position radially biased Garhtilse, on the one hand a located on the drill collar centrally arranged pin engages and on the other hand engages in a matched recess in the bit head.
  • annular Grooves can be used to make a positive connection both on the pin and alternatively be arranged in the recess.
  • the object is achieved according to the invention firstly by the fact that the chisel head and the MeiBelschaft are positively connected by an elastic element, which lies in a recess of the chisel head or the chisel shaft, in part is conically shaped, wherein the cone has an inclination of preferably 1 to 15 degrees opposite the central axis of the bit.
  • the bit head and the Chisel shank by an elastic element positively connected to each other, which is located in a recess which is partially conical, with the cone an inclination of preferably 1 to 15 degrees with respect to the central axis of the bit.
  • the conical recess preferably in the form of a circumferential conical groove
  • the either in a recess of the chisel head for the introduced Chisel shank or the chisel shaft is, sets an axial chisel movement when removing the same from the holder an increasing remindhaltkrart against, the one Moving out of the chisel safely prevented during the milling operation.
  • This undesirable axial oscillation of the bit under load changes be avoided.
  • a ring made of a plastic or a metal wherein in the latter, the elasticity of the metal inherent coil spring or Restoring force stems is another embodiment of the invention and alone therefore advantageous because such rings are very inexpensive.
  • the ring may be made of plastic or, if exposed to higher Temperatures on the chisel in particularly wear-prone inserts - made of metal, in particular, consist of a resilient steel.
  • the bit shank consists of a bit head associated upper part and a holder facing the lower part, by means of Coil spring are interconnected.
  • the invention further ausgestaltend is the Top of the chisel shaft removably attached to the chisel head.
  • the chisel head consists of a retaining cap, a retaining base and a carbide contact element, wherein the hard metal contact element is supported by retaining cap and retaining base and each of the three elements is individually interchangeable.
  • another embodiment according to the invention is that the hard metal contact element element has two opposing contact surfaces through an intermediate holding area are separated. In this way, the easily double the useful life. When wearing a contact surface of the hard metal contact element element can simply use the unused second contact surface become. Even with the lowest unit costs for chisels or chisel elements, this is Design of advantage because only half as much on both sides for the same service life usable carbide contact element elements must be kept as one-sided usable.
  • a last embodiment of the invention provides that elements of the bit to the Contact points to adjacent elements are provided with carbide elements to To further reduce wear and further increase the life of the chisel increase.
  • the chisel 2 shown in FIG. 1 and inserted in a holder 1 has a drill collar 3 and an attachable on this chisel head 4 with a carbide contact element. 5 in the form of a carbide tip.
  • the holder 1 can either directly with a Roll body z. B. by welding or as a so-called change holder z. B. by Screws with a base holder, which is welded to the roll body connected be.
  • the chisel head 4 of the chisel 2 is replaced by an elastic element 6 in the form of an O-ring, which on a recess 7 of the drill collar 3 under some tension elastically mounted, held on a bolt portion 9 of the drill collar 3.
  • the Chisel shaft 3 has essentially the shape of a cylinder with a over its The lateral surface protruding radially projecting flange 8.
  • the flange 8 divides the Cylinder in two bolt sections 9, 10 such that about one third of the total length of the cylinder form a first bolt portion 9, which in the chisel head 4th protrudes and the second pin portion 10 thus about two-thirds of the total length of the Cylinder and is inserted in the holder 1.
  • the chisel 2 can by means of a Austreibe rod and a hammer from the back driven out of the holder 1 and hammered into the holder 1 by means of a hammer become.
  • the chisel head 4 th separated by a combined rotation and pulling movement of the drill collar 3. It is the chisel head 4 to increase the grip to a sufficiently large torque to initiate for the rotational movement, with a suitable knurling 8 'or one Polygonal contour provided.
  • the flange 8 serves as a target wear body, which forms part of the to prevent unwanted wear of the holder 1.
  • the function of the flange 8 as sacrificial wear body is meaningful executable only by the invention, since only through this an additional wear surface between two metal surfaces can come.
  • FIG. 2 shows a chisel 2 in which the MeiBellsopf 4 in a chisel head cap 4 'and a chisel-head socket 4 "is divided.
  • a recess 7 ' which is the elastic element 6 in the form of a ring in itself, in this case in an inner wall of the Chisel head cap 4 'is located.
  • Two other ring connections hold the one hand Chisel head socket 4 "on the inserted in it the bolt portion 9 of the drill shank. 3 and on the other hand, the chisel shaft 3 in the holder 1.
  • Carbide contact element 5 has a holding region 13 in the form of a ball-shaped Thickening on which the hard metal contact element 5 in two Nutzabête 14, 14 'with outside contact areas 15, 15 'divided centrally.
  • the chisel head socket is 4 " one of the useful portions 14 of the carbide contact element 5 through a bore 16 adjusted accordingly.
  • the MeiBelkopfkappe 4 ' which has an opening 17 for the second useful portion 14' of Has carbide contact element 5 and also an adjoining below Recess 17 'which is adapted to the holding portion 13.
  • An advantage of Chisel 2 described is the most extensive adaptation to different characteristics Wear on the individual chisel areas. Also of great advantage the optional rotation of the Hatbzletall contact element 5 relative to the MeiBelkopfkappe 4 'and the chisel head base 4 ", through which a one-sided wear the hard metal contact element 5, even with an unrecognized deadlock and a concomitant prevention of the rotation of the bit 2 in the holder 1, is prevented.
  • the chisel 2 shown in FIG. 3 has an upper part 3 'and a lower part 3 ". divided and separated by a coil spring 18 drill collar 3.
  • the Coil spring 18 is extremely firmly on the protruding bolt sections 9, 19 of the Upper part 3 'and the lower part 3 "pressed impulsive release of the kinetic energy of the chisel head 4 on the Homelandtragende Material, which is why in this case a hammer-like effect is unfolded. After delivery the majority of the energy gives way to the chisel head 4 with the shaft top 3 'the Material off.
  • the embodiment allows the described effect of the Coil spring 18, the chisel 2 according to the invention even with such material to use, in the previously no adequate cutting or clamping action of the chisel 2 was observed. An elongated grinding and lubricating action of the chisel becomes effectively prevented.
  • Fig. 4 finally represents a chisel 2, in which particularly stressed areas the chisel head 4 are still provided with elements of hard metal.
  • the chisel shaft 3 attached carbide ring 21, which also by means of a braze connected to the MeiBelschaft 3 and the flush contact to the directly opposite adjoining Nl facedelkopf 4 has.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
EP05004601A 2004-03-10 2005-03-03 Ciseau pour une fraise Withdrawn EP1574309A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410011972 DE102004011972A1 (de) 2004-03-10 2004-03-10 Meißel einer Fräsvorrichtung
DE102004011972 2004-03-10

Publications (1)

Publication Number Publication Date
EP1574309A1 true EP1574309A1 (fr) 2005-09-14

Family

ID=34813659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05004601A Withdrawn EP1574309A1 (fr) 2004-03-10 2005-03-03 Ciseau pour une fraise

Country Status (2)

Country Link
EP (1) EP1574309A1 (fr)
DE (1) DE102004011972A1 (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7946656B2 (en) * 2006-08-11 2011-05-24 Schlumberger Technology Corporation Retention system
US7992945B2 (en) 2006-08-11 2011-08-09 Schlumberger Technology Corporation Hollow pick shank
US7997661B2 (en) 2006-08-11 2011-08-16 Schlumberger Technology Corporation Tapered bore in a pick
US8033615B2 (en) * 2006-08-11 2011-10-11 Schlumberger Technology Corporation Retention system
US8033616B2 (en) 2006-08-11 2011-10-11 Schlumberger Technology Corporation Braze thickness control
US8038223B2 (en) 2007-09-07 2011-10-18 Schlumberger Technology Corporation Pick with carbide cap
US8123302B2 (en) 2006-08-11 2012-02-28 Schlumberger Technology Corporation Impact tool
US8201892B2 (en) 2006-08-11 2012-06-19 Hall David R Holder assembly
US8292372B2 (en) 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US8322796B2 (en) 2009-04-16 2012-12-04 Schlumberger Technology Corporation Seal with contact element for pick shield
US8342611B2 (en) 2007-05-15 2013-01-01 Schlumberger Technology Corporation Spring loaded pick
US8414085B2 (en) 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US8485609B2 (en) 2006-08-11 2013-07-16 Schlumberger Technology Corporation Impact tool
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
EP2789794A1 (fr) * 2013-04-09 2014-10-15 Betek GmbH & Co. KG Burin, en particulier pour une tête de forage et/ou tête de coupe
US20150076894A1 (en) * 2013-09-19 2015-03-19 Sandvik Intellectual Property Ab Cutting bit and bit assembly
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US9366089B2 (en) 2006-08-11 2016-06-14 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2434899A1 (fr) * 1978-08-30 1980-03-28 Elfgen Apex Outil de fraisage pour une fraiseuse destinee a l'enlevement des revetements de routes
DE3500261A1 (de) * 1985-01-05 1986-07-10 Bergwerksverband Gmbh, 4300 Essen Gewinnungswerkzeug
US5018793A (en) * 1988-11-18 1991-05-28 Den Besten Leroy E Rotationally and axially movable bit
US5261499A (en) * 1992-07-15 1993-11-16 Kennametal Inc. Two-piece rotatable cutting bit
US5927411A (en) * 1997-04-16 1999-07-27 Kennametal Inc. Connector with variable resistance retention member

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8622605D0 (en) * 1986-09-19 1986-10-22 Wimet Mining Ltd Mineral cutting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2434899A1 (fr) * 1978-08-30 1980-03-28 Elfgen Apex Outil de fraisage pour une fraiseuse destinee a l'enlevement des revetements de routes
DE3500261A1 (de) * 1985-01-05 1986-07-10 Bergwerksverband Gmbh, 4300 Essen Gewinnungswerkzeug
US5018793A (en) * 1988-11-18 1991-05-28 Den Besten Leroy E Rotationally and axially movable bit
US5261499A (en) * 1992-07-15 1993-11-16 Kennametal Inc. Two-piece rotatable cutting bit
US5927411A (en) * 1997-04-16 1999-07-27 Kennametal Inc. Connector with variable resistance retention member

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8123302B2 (en) 2006-08-11 2012-02-28 Schlumberger Technology Corporation Impact tool
US9366089B2 (en) 2006-08-11 2016-06-14 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US8029068B2 (en) 2006-08-11 2011-10-04 Schlumberger Technology Corporation Locking fixture for a degradation assembly
US8033615B2 (en) * 2006-08-11 2011-10-11 Schlumberger Technology Corporation Retention system
US8033616B2 (en) 2006-08-11 2011-10-11 Schlumberger Technology Corporation Braze thickness control
US7946656B2 (en) * 2006-08-11 2011-05-24 Schlumberger Technology Corporation Retention system
US8061784B2 (en) * 2006-08-11 2011-11-22 Schlumberger Technology Corporation Retention system
US7997661B2 (en) 2006-08-11 2011-08-16 Schlumberger Technology Corporation Tapered bore in a pick
US7992945B2 (en) 2006-08-11 2011-08-09 Schlumberger Technology Corporation Hollow pick shank
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit
US10378288B2 (en) 2006-08-11 2019-08-13 Schlumberger Technology Corporation Downhole drill bit incorporating cutting elements of different geometries
US8201892B2 (en) 2006-08-11 2012-06-19 Hall David R Holder assembly
US8414085B2 (en) 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US8454096B2 (en) 2006-08-11 2013-06-04 Schlumberger Technology Corporation High-impact resistant tool
US8485609B2 (en) 2006-08-11 2013-07-16 Schlumberger Technology Corporation Impact tool
US9708856B2 (en) 2006-08-11 2017-07-18 Smith International, Inc. Downhole drill bit
US8342611B2 (en) 2007-05-15 2013-01-01 Schlumberger Technology Corporation Spring loaded pick
US8038223B2 (en) 2007-09-07 2011-10-18 Schlumberger Technology Corporation Pick with carbide cap
US8292372B2 (en) 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US8322796B2 (en) 2009-04-16 2012-12-04 Schlumberger Technology Corporation Seal with contact element for pick shield
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
EP2789794A1 (fr) * 2013-04-09 2014-10-15 Betek GmbH & Co. KG Burin, en particulier pour une tête de forage et/ou tête de coupe
US20150076894A1 (en) * 2013-09-19 2015-03-19 Sandvik Intellectual Property Ab Cutting bit and bit assembly
US9359894B2 (en) * 2013-09-19 2016-06-07 Sandvik Intellectual Property Ab Cutting bit and bit assembly

Also Published As

Publication number Publication date
DE102004011972A1 (de) 2005-09-22

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