EP0152125A2 - Drehendes Werkzeug mit Schneidplatten - Google Patents

Drehendes Werkzeug mit Schneidplatten Download PDF

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Publication number
EP0152125A2
EP0152125A2 EP85200029A EP85200029A EP0152125A2 EP 0152125 A2 EP0152125 A2 EP 0152125A2 EP 85200029 A EP85200029 A EP 85200029A EP 85200029 A EP85200029 A EP 85200029A EP 0152125 A2 EP0152125 A2 EP 0152125A2
Authority
EP
European Patent Office
Prior art keywords
insert
block
rotary tool
tool
cutting inserts
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Withdrawn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
EP85200029A
Other languages
English (en)
French (fr)
Other versions
EP0152125A3 (de
Inventor
Licio Muzzolini
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.)
STARK SpA
Original Assignee
STARK SpA
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 STARK SpA filed Critical STARK SpA
Publication of EP0152125A2 publication Critical patent/EP0152125A2/de
Publication of EP0152125A3 publication Critical patent/EP0152125A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
    • B27G13/04—Securing the cutters by mechanical clamping means

Definitions

  • This invention concerns a rotary tool with cutting inserts; to be more exact, the invention concerns a rotary tool in which the inserts which constitute the cutting elements are clamped in a simple and secure manner.
  • Such rotary tools are, for instance, those employed to process wood or plastics, or in any event are tools which are rotated at a high speed.
  • the inserts are self-positioning since inclined surfaces are provided in the hollow made to lodge the inserts and cooperate with blocks to retain the inserts.
  • the threaded means have two threaded portions with a righthand and a lefthand thread respectively.
  • such an embodiment requires a great depth of the hollow needed to lodge the blocks that secure the cutting insert or tool bit. It is therefore not suitable in cases where a modest depth of such hollow is required; this may be so when the rotary tools have a small diameter and large central hole or where the inserts are to be secured in the front of tools having a particularly small thickness.
  • a first purpose of this invention is therefore to provide a rotary tool in which, for dimensional reasons, a lodgement for the block or blocks is required to have a restricted depth in both a frontal and a radial direction.
  • fixture of the inserts in the tool should be proof against violent disintegration and should provide self-positioning of the inserts.
  • Another purpose of the invention is to simplify the construction and manufacture of the hollows and of the blocks employed to secure the inserts, thus enabling equipment which is inexpensive and not very sophisticated to be used.
  • a further purpose of the invention is to provide a quick and simplified installation of the inserts in the tool.
  • a rotary tool comprising a screw-threaded element having two threaded portions with a lefthand thread at one end of the element and a righthand thread at the other end, such element being engaged directly in the body of the tool at one end and in a specially shaped block at its other end.
  • the latter block comprises pins or teeth able to engage corresponding recesses in the insert so as to keep the insert in position.
  • the inclination of the surfaces of the various blocks is such as to produce a self-positioning thrust against the insert when the threaded element is tightened.
  • a further p.rpose of such an embodiment is to prevent a badly positioned insert from protruding farther than the others from the working profile and thus being alone in cutting the material and therefore becoming worn quickly.
  • the invention concerns mainly the frontal fixture of the inserts in the tool, especially when the rotary tool has a small thickness; however, the invention concerns also the peripheral fixture of inserts in the tool and also, in a variant, the fixture of inserts of high speed steel; as is known, the latter can be re-sharpened and are made in one piece together with the relative block.
  • the rotary tool of this invention comprises also another block which acts to resist the former block and which can be secured within its hollow by means of the cited screw-threaded element with two threaded portions.
  • This invention is therefore embodied in a rotary tool with cutting inserts, which comprises for each insert an anchorage block to position the insert and at least one resisting block cooperating with an adjusting screw having two portions with a righthand and a lefthand thread respectively, such blocks being lodged inside a hollow which narrows towards the outside of the tool, the rotary tool being characterized in that the anchorage block and the resisting block cooperate along a surface inclined in relation to the axis of the adjusting screw, which is engaged at one end in the body of the tool and at its other end in such resisting block.
  • a rotary tool with cutting inserts bears the reference number 10 and in this example contains two frontal inserts 11 and two peripheral inserts 12.
  • the tool 10 can comprise any number of inserts 11 and/or 12 according to its end use.
  • a tool 10 of this type can be employed to process window or door frames and may comprise one or more sets of frontal inserts 11 and/or peripheral inserts 12.
  • Fig.2 shows more clearly along the section A-A of Fig.l the fixture of the insert 11, which in its installed position presses with its lower side against an abutment surface 13 machined within a lodgement or hollow 14 that has a conformation suitable to be able to accommodate the insert and the fixture blocks.
  • An anchorage block 15 presses against the insert 11 and is provided with projections or pins 16 able to cooperate with corresponding recesses 17 in the insert 11.
  • a resisting block 18 is able to slide substantially vertically within the lodgement 14 and is positioned by means of a screw-threaded element 19 having a lefthand thread at one end and a righthand thread at its other end.
  • Such screw element 19 in turn is engaged at one of its ends within the body 110 of the tool 10 itself and advantageously is of a hexagonal-head socket screw type.
  • the resisting blocks 18, which are two in number in this case, have a cylindrical shape with one flat lateral face.
  • these blocks 18 are produced from round bars and the face 118 which cooperates with the anchorage block 15 is machined with a flattening machine. The fabrication and adjustment of the resisting blocks 18 are simplified in this way.
  • the hollow 14 has a very small depth in the vertical direction in this figure. This is one of the purposes of the invention, which in fact is intended to make possible a secure fixture of the inserts in the event of tools which have a small thickness and therefore cannot comprise hollows of a great depth without a risk of structural weakness.
  • Fig.3 shows a section of a peripheral fixture of an insert 12.
  • one anchorage block 15 equipped with projections 16 cooperating with a recess 17 in the insert 12 is employed; there is also one resisting block 18 cooperating here also with a screw element 19 having a righthand thread at one end and a lefthand thread at its other end.
  • Figs.4a and 4b respectively give two possible peripheral views of the embodiment of Fig.3 for tools having a small thickness and a considerable thickness respectively.
  • the different widths of the cutting insert 12 cause one resisting block 18 and two resisting blocks 18 respectively to be employed.
  • the number of blocks 18 used will therefore be proportional to the width of the insert 12.
  • Fig.3 shows how the depth of the hollow 14 is of a modest radial extent. This can be important, for instance, in the case of rotary tools which have a small diameter or a central hole of a considerable diameter, for in such a case the useful thickness is heavily reduced.
  • Fig.5 shows an insert 20 according to the invention, which is made of high speed steel and can therefore be re-ground.
  • the lower part 120 of the insert 20 cooperates directly with the hollow 14 and performs the functions which were carried out by the anchorage block 15 in the embodiments described above; here also a resisting block 18 is provided and cooperates with a screw 19 having two threaded portions.
  • the arrangement of the blocks 15-18 is such as to create an effect of resistance to violent disintegration of the tool 10.
  • the inclination of the lateral faces of the hollow 14 is such as to retain the inserts 11-12 or re-grindable insert 20 even when the screw 19 becomes slackened or the inserts are badly fixed.
  • the fixture of the insert 11-12-20 is very simple since such insert is introduced laterally within the hollow 14.
  • the resisting block 18, with the screw element 19 in a position such as to leave such block 18 towards the bottom of the hollow 14, is positioned first of all.
  • this invention accomplishes the purpose not only of simplifying the fixture of the inserts but also of simplifying considerably the construction of the blocks 15-18 and the equipment needed to manufacture the various components of the rotary tool. n

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Dowels (AREA)
  • Milling Processes (AREA)
EP85200029A 1984-02-08 1985-01-15 Drehendes Werkzeug mit Schneidplatten Withdrawn EP0152125A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8331784 1984-02-08
IT83317/84A IT1181163B (it) 1984-02-08 1984-02-08 Sistema di fissaggio degli inserti negli utensili rotanti

Publications (2)

Publication Number Publication Date
EP0152125A2 true EP0152125A2 (de) 1985-08-21
EP0152125A3 EP0152125A3 (de) 1986-06-11

Family

ID=11320025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200029A Withdrawn EP0152125A3 (de) 1984-02-08 1985-01-15 Drehendes Werkzeug mit Schneidplatten

Country Status (4)

Country Link
EP (1) EP0152125A3 (de)
ES (1) ES540175A0 (de)
IT (1) IT1181163B (de)
PT (1) PT79935B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626513A1 (fr) * 1988-01-28 1989-08-04 Villagrasa Ferrer Francisco Systeme de fixation d'outils et d'instruments sur machines-outils
EP0412950A3 (en) * 1989-08-10 1991-04-24 Seco Tools Ab Broaching assembly
CH709488A1 (de) * 2014-04-14 2015-10-15 Oertli Werkzeuge Ag Werkzeugkopf und Verfahren zum Einsetzen und Spannen einer Schneidplatte, sowie Schneidplatte.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2249146B2 (es) * 2004-06-29 2007-02-16 Francisco Villagrasa Ferrer Sistema de posicionamiento y anclaje de utiles y herramientas a maquinas-herramienta.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE20722E (en) * 1936-11-30 1938-05-10 Blade anchoring wedge
US2178590A (en) * 1937-03-27 1939-11-07 Ingersoll Milling Machine Co Method of and apparatus for surfacing metal workpieces
DE712851C (de) * 1938-04-06 1941-10-27 Franz Buelow Vormals Serra & B Befestigung der Messer in Messerwellen von Holzhobelmaschinen
DE7602409U1 (de) * 1976-01-29 1976-12-09 Ledermann + Co, 7240 Horb Einbauhalter fuer ein schneidwerkzeug
DE2916138A1 (de) * 1979-04-20 1980-10-23 Lach Spezial Werkzeuge Gmbh Einbauhalter fuer einen messerkopf
IT1147492B (it) * 1981-05-11 1986-11-19 Stark Spa Mezzi di bloccaggio degli inserti negli utensili rotanti

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626513A1 (fr) * 1988-01-28 1989-08-04 Villagrasa Ferrer Francisco Systeme de fixation d'outils et d'instruments sur machines-outils
EP0412950A3 (en) * 1989-08-10 1991-04-24 Seco Tools Ab Broaching assembly
CH709488A1 (de) * 2014-04-14 2015-10-15 Oertli Werkzeuge Ag Werkzeugkopf und Verfahren zum Einsetzen und Spannen einer Schneidplatte, sowie Schneidplatte.
WO2015157871A3 (de) * 2014-04-14 2015-12-03 Oertli Werkzeuge Ag Werkzeugkopf und verfahren zum einsetzen und spannen einer schneidplatte, sowie schneidplatte
US11298851B2 (en) 2014-04-14 2022-04-12 Oertli Werkzeuge Ag Tool head and method for inserting and clamping a cutting insert, and cutting insert

Also Published As

Publication number Publication date
ES8601001A1 (es) 1985-11-16
PT79935B (en) 1986-11-12
IT8483317A0 (it) 1984-02-08
EP0152125A3 (de) 1986-06-11
IT1181163B (it) 1987-09-23
PT79935A (en) 1985-03-01
ES540175A0 (es) 1985-11-16

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Inventor name: MUZZOLINI, LICIO