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EP0078041B1 - Chaîne à haver pour une machine à couper des pierres - Google Patents

Chaîne à haver pour une machine à couper des pierres Download PDF

Info

Publication number
EP0078041B1
EP0078041B1 EP82109816A EP82109816A EP0078041B1 EP 0078041 B1 EP0078041 B1 EP 0078041B1 EP 82109816 A EP82109816 A EP 82109816A EP 82109816 A EP82109816 A EP 82109816A EP 0078041 B1 EP0078041 B1 EP 0078041B1
Authority
EP
European Patent Office
Prior art keywords
plate
cutting
cutter
chain
holder
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.)
Expired
Application number
EP82109816A
Other languages
German (de)
English (en)
Other versions
EP0078041A3 (en
EP0078041A2 (fr
Inventor
Johann Mylewski
Horst Weisner
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.)
Maschinenfabrik Korfmann GmbH
Original Assignee
Maschinenfabrik Korfmann 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
Priority claimed from DE19813142068 external-priority patent/DE3142068A1/de
Priority claimed from DE19813142067 external-priority patent/DE3142067A1/de
Priority claimed from DE19823225916 external-priority patent/DE3225916A1/de
Application filed by Maschinenfabrik Korfmann GmbH filed Critical Maschinenfabrik Korfmann GmbH
Publication of EP0078041A2 publication Critical patent/EP0078041A2/fr
Publication of EP0078041A3 publication Critical patent/EP0078041A3/de
Application granted granted Critical
Publication of EP0078041B1 publication Critical patent/EP0078041B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/14—Saw chains
    • B27B33/142—Cutter elements
    • B27B33/144—Cutter elements having cutting inserts or exchangeable cutting teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/14—Saw chains
    • B27B33/142—Cutter elements
    • B27B33/145—Cutter elements having plural teeth on a single link
    • 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
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/124—Saw chains; rod-like saw blades; saw cables
    • B28D1/125—Saw chains; rod-like saw blades; saw cables with exchangeable cutter bits or cutter segments
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/22—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
    • E21C25/28—Chains or chain guides
    • E21C25/34—Chains

Definitions

  • the invention relates to a cutting chain for a stone cutting machine, which consists of alternating chisel holders and intermediate links each as chain links, and in which the chisel holders carry a cutting plate which is fixed by a regular shape on the chisel holder with respect to the position about the central axis and with the aid of clamping devices is held and has a circular or polygonal peripheral shape.
  • a chisel holder also used for cut chains, is known, in which the cutting plate is positioned in the form of a chisel holder and is clamped with the aid of a screw.
  • the clamping screw more or less only has the function of keeping the cutting insert in the form, thereby securing against twisting.
  • this securing is only available with fresh cutting inserts which still have their full circumferential shape and thus bring about a satisfactory form fit with the regular shape.
  • the invention proposes that a clamping finger designed as a bridge, one end of which is supported on the front side of the cutting plate and the other end of which is supported on a surface which is plane-parallel to the cutting plate, or a claw is provided as one clamping means Front side rests on the cutting plate and with its other end side on a support surface opposite the cutting plate, preferably forming an angle of approximately 20 ° with the cutting plate, the clamping fingers and the claw each being tensioned with the aid of a threaded bolt.
  • the two alternatives according to the invention in the form of the claw or in the form of the clamping finger allow the use of extremely strong bolts, since the latter are independent of the shape of the cutting plate and do not have to protrude through a central opening within the cutting plate. Damage due to bending and thus difficulties in releasing such clamping devices are practically excluded.
  • a clamping force can be achieved with such clamping means, which guarantees an adequately firm fit of the cutting plate even in the case of inadequate positive locking of the cutting plate with the regular shape in the chisel holder.
  • each insert is provided with an extension which engages in the regular shape.
  • the inclusion within the chisel holder does not necessarily have to completely surround the attachment, but it is sufficient if there is sufficient positive locking. If, for example, the attachment has one or more pairs of edges, the respective individual edges of which run parallel to one another, a groove is sufficient as a receptacle in the chisel holder in order to position the cutting plate correctly in each case.
  • the approach then has the shape of an even, even polygon. If the cutting plate has a similar shape and only one cutting edge engages with the rock during a cut, it is particularly expedient when re-sharpening, i.e.
  • the inserts consist of hard metal or are covered with diamond chips, whereby the base body can also be made of hard metal.
  • the base body can also be made of hard metal.
  • the generally inevitable transition from the insert to the approach as a diameter jump can then no longer contribute to the risk of breakage due to its notch effect.
  • the approach preferably consists of a tough material, for example a tempered steel, which should have a relatively wear-resistant surface. Case-hardened steels can also be used.
  • each cutting insert can be expedient, which can be brought about by a corresponding position of the receptacle within the chisel holder and the clamping means.
  • each cutting edge can be undercut to achieve a clearance angle.
  • each insert is therefore arranged approximately at the level of the rear hinge axis of the chisel holder in the direction of travel, and a hump is attached in front of the insert, which is optionally covered with hard metal or with diamond chips.
  • the height of the cusp is chosen so that it maintains a clear distance from the cut stone face in the normal cut and only touches the cut surface when attempting to straighten up. In this way, major damage to the chamfer chain can be effectively prevented.
  • the form-fitting connection through the attachment and the receptacle in the chisel holder can of course also be brought about by a reversal of the principle in which there is a regular polygonal opening in the cutting insert, into which, for example, a projection attached to the chisel holder engages.
  • the projection can be arranged at the front end of a pin which can be knocked out of the chisel holder, the pin having the tough and wear-resistant properties already mentioned above.
  • the opening inside the cutting plate can be continuous since the center of the cutting plate does not take part in the cutting process anyway. In this way, the interaction with a clamping finger or a claw, which are correspondingly provided with an attachment, is particularly simple, and the projection can then be restricted to a pure centering function.
  • FIG. 1 shows a chisel holder 28 which forms part of a cut chain which is formed from a multiplicity of identical and similar chisel holders 28 as chain links and from intermediate chain links 3.
  • the two chain links 28 and 3 are articulated to one another with the aid of bolts 5 and brackets 6, the bit holder 28 being double-walled and each intermediate link 3 being single-walled.
  • a sequence of, for example, nine chisel holders 28 forms the broaching profile of the cutting chain, which is joined together by stringing further sequences into a cutting chain.
  • a partial negative shape 30 of a uniformly hexagonal, slightly conical extension 31 which is soldered directly onto the back of a likewise hexagonal cutting plate 15.
  • a support surface 29 on which a claw 32 is supported Opposite the negative mold 30 is a support surface 29 on which a claw 32 is supported.
  • the claw 32 is designed such that it rests exclusively on the support surface 12 and on the front of the cutting plate 15. It is tensioned with the aid of a threaded bolt 33, the direction of action of which runs approximately parallel to the plane of the support surface 29.
  • the plane of the support surface forms an angle of approximately 20 ° with that of the cutting plate 15, which results in very good and secure clamping forces.
  • the cutting plate 15 has the shape of a regular hexagon, so that there are six side surfaces, three of which are designated a, b, and c.
  • the cutting edge facing the side surface a first acts. After they have become dull or worn, either the cutting edge assigned to the side surfaces b or c should be brought into effect, in any case not the opposite one (between b and c) or the neighboring one (immediately next to a). It is then ensured that completely fresh cutting edges come into effect three times in succession, and then three cutting edges that are reduced in width due to the preceding cutting processes, but still have a symmetrical position with respect to the central plane of the bit holder 28.
  • a symmetrical position to the center plane of the chisel holder 28 is therefore important so that no lateral cutting forces act on the chain link and thus on the chain guide bring with it increased wear of the chain guide.
  • a regular hexagon shape for the insert 15 an octagon, a square or another shape following a grid can also be selected.
  • the exemplary embodiment according to FIG. 1 naturally also requires further chisel holders 28, which together form a complete chain clearing profile.
  • FIGS. 2 and 3 also shows a one-piece chisel holder 38 which is equipped in its front upper region with a hump 24 for containing erection movements during the cut.
  • a chisel console 13 on which a cutting plate 40 is held.
  • a bore in the chisel console 13 which points approximately in the running direction of the cutting chain and into which a pin 39 is driven.
  • the front end of the pin 39 protrudes over an abutment surface in the manner of a projection and projects into an opening within the cutting plate 40.
  • the projection on the pin 39 and the opening in the cutting plate 40 are each hexagonal in shape and match each other, so that when the pin 39 is firmly seated in the chisel console 13, the cutting plate 40 is positively fixed.
  • a clamping finger 7 which is designed like a bridge and rests with one end on the front of the cutting plate 40 and with its other end on a contact surface which is plane-parallel to the contact surface for the cutting plate 40 on the other side.
  • Chisel console 13 is present. Between the two ends there is a through hole for receiving a screw 42 which is screwed into a threaded hole within the chisel console. The threaded hole is overall deeper, that is, further away from the cutting point than the hole for receiving the pin 39, so that the clamping finger 41 assumes an obliquely downward position.
  • a further threaded hole for the screw 42 can be provided on the adjacent side of the contact surface for the clamping finger 41, so that two threaded holes are available, which is advantageous, for example, when a screw 41 is broken off or one of the threaded holes is clogged for other reasons.
  • An Allen screw or a conventional screw with a hexagon head can be used as screw 42.
  • the surface which bears against the front of the cutting plate 40 is also provided with a hexagonal projection for engaging in the hexagonal opening in the cutting plate 40.
  • a hexagonal projection for engaging in the hexagonal opening in the cutting plate 40.
  • FIGS. 2 and 3 show that the invention can also be used successfully in conjunction with negative cutting angles; the associated contact surfaces on the chisel console 13 are each inclined slightly backwards.
  • the choice of the cutting angle is based on the application of the individual case and depends, among other things, on the stone to be cut and on the properties of the inserts used in each case.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (6)

  1. >1..Ghaîne..de..havage pour une machine à couper des pierres qui est constituée alternativement par des supports d'outil de coupe (28, 38) et des éléments intermédiaires (3) formant respectivement des éléments de chaîne et dans laquelle les supports d'outil de coupe (28, 38) portent une plaquette de coupe (15, 40) qui, grâce à une forme régulière (30), est immobilisée sur le support d'outil de coupe (28, 38) en ce qui concerne la position autour de l'axe central et maintenue à l'aide d'organes de serrage (32, 41) et qui présente une forme circonférentielle circulaire ou polygonale, caractérisée en ce que l'organe de serrage est constitué par un doigt de serrage (41) conformé en pont et s'appuyant avec l'une de ses extrémités sur la face avant de la plaquette de coupe (40) et, avec l'autre extrémité, sur une surface plane-parallèle à la plaquette de coupe (40), ou par une griffe (32) dont l'une des faces frontales est appliquée contre la plaquette de coupe (15) et dont l'autre face frontale repose sur une surface d'appui (29) opposée à la plaquette de coupe (15) et formant, de préférence, avec ladite plaquette de coupe un angle de 20° environ, le doigt de serrage (41) et la griffe (32) étant bloqués respectivement à l'aide d'un boulon fileté (42, 33).
  2. 2. Chaîne de havage selon la revendication 1, caractérisée en ce que l'axe central de la plaquette de coupe (15, 40) est incliné par rapport à la verticale dans le sens d'un angle de coupe positif et que chaque tranchant de la plaquette de coupe (15,40) présente une contredépouille en vue d'obtenir une dépouille.
  3. 3. Chaîne de havage selon l'une des revendications 1 ou 2, caractérisée en ce que chaque plaquette de coupe (15, 40) est disposée, vu dans le sens de déplacement, à peut près au niveau de l'axe d'articulation arrière du support d'outil de coupe (28, 38) et qu'une bosse (24), éventuellement avec mise de métal dur ou avec garniture d'éclats de diamant, est placée devant la plaquette de coupe (40) pour empêcher un redressement du support d'outil de coupe (28, 38).
  4. 4. Chaîne de havage selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la forme régulière est constituée par une saillie de section hexagonale sur le doigt de serrage (41) et que la plaquette de coupe (40) comporte une ouverture de forme analogue.
  5. 5. Chaîne de havage selon l'une quelconque des revendicationns 1 à 3, caractérisée en ce que la plaquette de coupe (15) est munie d'une embase (31) qui s'engage dans la forme régulière (30).
  6. 6. Chaîne de havage selon la revendication 3, caractérisée en ce que l'embase (31) constitue un élément autonome qui es soudé sur la plaquette de coupe (15) et qu'elle est réalisée en un acier tenace et/ou traité.
EP82109816A 1981-10-23 1982-10-23 Chaîne à haver pour une machine à couper des pierres Expired EP0078041B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19813142068 DE3142068A1 (de) 1981-10-23 1981-10-23 Schraemkette an einer schraemmaschine
DE19813142067 DE3142067A1 (de) 1981-10-23 1981-10-23 Schraemkette an einer schraemmaschine
DE3142067 1981-10-23
DE3142068 1981-10-23
DE19823225916 DE3225916A1 (de) 1982-07-10 1982-07-10 Schraemkette fuer eine steinschneidmaschine
DE3225916 1982-07-10

Publications (3)

Publication Number Publication Date
EP0078041A2 EP0078041A2 (fr) 1983-05-04
EP0078041A3 EP0078041A3 (en) 1983-08-17
EP0078041B1 true EP0078041B1 (fr) 1986-03-12

Family

ID=27189636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82109816A Expired EP0078041B1 (fr) 1981-10-23 1982-10-23 Chaîne à haver pour une machine à couper des pierres

Country Status (2)

Country Link
EP (1) EP0078041B1 (fr)
DE (1) DE3269867D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29605752U1 (de) * 1996-03-28 1996-05-30 Maschinenfabrik Korfmann GmbH, 58455 Witten Schrämkette
BE1019003A3 (fr) * 2009-11-19 2011-12-06 Pmds Sa Nv Chaine de haveuse et haveuse.
IT1401596B1 (it) * 2010-08-18 2013-07-26 Fantini Sud S P A Inserto perfezionato in diamante policristallino a bloccaggio amovibile e relativi portainserti, per le segatrici a catena di pietre ornamentali
BE1019468A3 (fr) * 2010-09-06 2012-07-03 P Marchandise Diamant Service P M D S Chaine de haveuse a roche avec porte-outils, procede de fabrication de celle-ci et haveuse.
ITBS20120099A1 (it) * 2012-06-29 2013-12-30 Apns Di Pasqualato Paolo Mario Catena di taglio per materiali lapidei
WO2016095944A1 (fr) * 2014-12-15 2016-06-23 Husqvarna Ab Procédé pour fabriquer un maillon de dispositif de coupe et maillon de dispositif de coupe
IT201800009296A1 (it) * 2018-10-09 2020-04-09 Fabio Bigini Utensile di taglio e tagliatrice a catena per materiale lapideo e simili

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB391736A (en) * 1933-01-09 1933-05-04 Alexander Anderson Improvements relating to pick-holders for the cutter chains of mining machines
GB422594A (en) * 1934-01-02 1935-01-15 Austin Hopkinson Improvements in or relating to coal and like cutting machines
GB614865A (en) * 1946-08-08 1948-12-23 Norman James Muschamp Improvements in or relating to pick boxes for mining machines
GB623346A (en) * 1947-05-03 1949-05-16 Norman James Muschamp Improvements in or relating to cutter devices for coal and the like cutting machines
US3485533A (en) * 1967-02-01 1969-12-23 Austin Hoy & Co Ltd Cutter picks
DE1915152A1 (de) * 1969-03-25 1970-10-01 Eickhoff Geb Schraemmeisselhalter,der mit mindestens zwei nebeneinander angeordneten Schraemmeisseln besetzt ist
US3746396A (en) * 1970-12-31 1973-07-17 Continental Oil Co Cutter bit and method of causing rotation thereof
US4079796A (en) * 1976-03-22 1978-03-21 Arnol Staggs Cutting machine and augering tool
US4193638A (en) * 1978-05-12 1980-03-18 Dresser Industries, Inc. Multiple tip cutting bit for rotary drum-type cutter

Also Published As

Publication number Publication date
DE3269867D1 (en) 1986-04-17
EP0078041A3 (en) 1983-08-17
EP0078041A2 (fr) 1983-05-04

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