EP0065496B1 - Outil rotatif pour l'usinage à grande vitesse de bois, matières plastiques ou métaux légers - Google Patents

Outil rotatif pour l'usinage à grande vitesse de bois, matières plastiques ou métaux légers Download PDF

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Publication number
EP0065496B1
EP0065496B1 EP82830097A EP82830097A EP0065496B1 EP 0065496 B1 EP0065496 B1 EP 0065496B1 EP 82830097 A EP82830097 A EP 82830097A EP 82830097 A EP82830097 A EP 82830097A EP 0065496 B1 EP0065496 B1 EP 0065496B1
Authority
EP
European Patent Office
Prior art keywords
clamp body
insert
tool
housing space
resisting block
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
EP82830097A
Other languages
German (de)
English (en)
Other versions
EP0065496A3 (en
EP0065496A2 (fr
Inventor
Licio Muzzolini
Sergio Solari
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
Priority to AT82830097T priority Critical patent/ATE18367T1/de
Publication of EP0065496A2 publication Critical patent/EP0065496A2/fr
Publication of EP0065496A3 publication Critical patent/EP0065496A3/en
Application granted granted Critical
Publication of EP0065496B1 publication Critical patent/EP0065496B1/fr
Expired 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
    • B27G13/08—Cutter blocks; Other rotary cutting tools in the shape of disc-like members; Wood-milling cutters
    • B27G13/10—Securing the cutters, e.g. by clamping collars

Definitions

  • This invention concerns a rotary tool for high-speed machining of wood, plastics or light metals.
  • this invention is concerned with the problem of clamping inserts in rotary tools which are employed advantageously for the processing of wood or plastics, or, in any case, in tools which rotate at high speed.
  • Clamping means should preferably to provided which align and secure the insert automatically.
  • Patent CH-A-619.880 discloses a system for fixture of inserts by which the insert is retained by a clamping element provided with means able to retain the insert positively.
  • the clamping element in its turn is thrust by a resisting element with a wedge-wise action.
  • the clamping force is provided by an adjustment screw acting between the resisting element and the body of the tool.
  • a housing space which has the shape substantially of a truncated cone and which widens towards the middle of the tool holder.
  • a suitable seating space for the tool At the side of the housing space is envisaged a suitable seating space for the tool, and such seating is dimensioned and positioned perfectly in relation to the middle of the tool itself so that, when such seating supports the tool or insert, the tool or insert is located perfectly in relation to the middle of the tool holder and therefore in relation to the plurality of other tools or inserts.
  • the clamping body has two clamping surfaces that cooperate with resisting blocks on which a regulating or adjusting screw having a righthand thread and a lefthand thread acts.
  • the regulating screw comprises in an intermediate position a ring which provides lengthwise anchorage and which can cooperate with an anchorage hollow that may possibly be included in the clamping body. Substitute means can also be visualized.
  • Such anchorage ring can cooperate with a safety pin which holds the regulating screw onto the clamping body and which can exert at the same time on the clamping body an outwards thrust that constrains the clamping body to be embedded in the housing space.
  • the anchorage ring has an intermediate hollow within which the safety pin is made to pass.
  • the opposing surfaces are not linear but have a substantially rounded development so as to reduce to a minimum the necessity for accurate mating.
  • the area of contact between the resisting blocks and the opposing wall may possibly be suitably shaped.
  • the resisting block cooperates with a screw located in an almost radial position and acting on both the resisting block and the clamping body at the same time.
  • the resisting block comprises a slit such that the walls of the block itself are made elastic.
  • the invention provides a rotary tool for high-speed machining of wood, plastics or light metals, comprising a tool holder and a plurality of replaceable cutting inserts, the tool holder having a plurality of housing spaces that widen peripherally in the direction of the centre of the tool holder, each housing space including a stepped seating for an insert in the trailing direction relative to the.normal direction of rotation of the tool: a clamp body located in each housing space and cooperating with means to retain each insert positively in the radially outward direction: at least one resisting block located in each housing space: an adjusting screw for providing movement between each resisting block and its associated clamp body such that by reaction with the walls of the housing space there is produced a thrust in the peripheral direction of the tool holder to constrain the resisting block against an opposing wall of the housing space and to constrain the clamp body against the insert; characterized in that each adjusting screw is operable to cause a separating movement between a said clamp body and at least one said resisting block to produce firstly the said thrust and secondly a component
  • FIG. 1 gives a vertical section of a possible embodiment of the invention
  • a tool holder 10 comprises a housing space 11 with an opposing wall 12 and a supporting wall 13; a lateral seating 14 for a tool is provided in the supporting wall 13.
  • the seating 14 for a tool includes a supporting corner 15 and a wall 16 supporting an insert.
  • the conformation of the housing 11 substantially like a truncated cone has the effect that, as the wall 16 supporting an insert 23 is substantially parallel to a plane passing through the axis of the tool holder 10, the opposing wall 12 will cut such plane at a position a great deal above the middle of the tool holder 10.
  • the wall 16 supporting the insert and the supporting corner of the seating 14 for a tool are positioned perfectly in relation to the centre of rotation of the tool holder 10.
  • a clamping body 17 is introduced within the housing 11 and, in the example of Fig. 1, comprises a lengthwise hollow 32 in which are located two resisting blocks 18-118 cooperating with a regulating screw 19 having a righthand and a lefthand thread.
  • the regulating or adjusting screw 19 includes a ring 20 for lengthwise anchorage, and such ring 20 cooperates with a hollow 21 for lengthwise anchorage formed in the clamping body 17.
  • Opposing surfaces 22 are provided in the lengthwise hollow 32 of the clamping body 17 and cooperate with respective resisting surfaces 122 formed on the resisting blocks 18.
  • the resisting blocks 18 are, for instance, drawn towards each other and the respective resisting surfaces 122 press on the opposing surfaces 22 of the clamping body 17.
  • the position of the opposing wall 12 conditions the characteristics of the movement of the clamping body 17.
  • the tool 23 comprises one or more holes 24 which cooperate with appropriate pins 25 solidly fixed to the clamping body 17.
  • This action constrains the insert 23 to rest perfectly against the wall 16 and at the same time against the corner 15 and to be positioned perfectly in relation to the middle of the tool holder 10 and to the other tools.
  • the clamping body 17 is advantageously envisaged as comprising a protective outlet 26 which cooperates with the cutting edge of the insert 23 lying against the supporting corner 15.
  • the safety pin 27 can be single, as in Fig. 1, or double, as in Fig. 3, or can have other suitable shapes according to the requirements of the design.
  • the ring 20 providing lengthwise anchorage and comprised in the regulating screw 19 can have an intermediate hollow 28 within which the safety pin 27 is made to lodge; in this way the hollow 21 providing lengthwise anchorage is rendered unnecessary.
  • the embodiment now shown entails a movement substantially parallel to the axis of rotation of the tool holder 10.
  • a clamping action can be obtained which is in principle substantially the same as that of Fig. 1 but which is substantially different as an embodiment to be applied.
  • the resisting block 218 is thrust towards the opposing wall 12 by screw means 119, which also have a righthand and a lefthand thread and which engage the resisting block 218 and the clamping body 117 at one and the same time.
  • clamping body 117 is thrust not only towards the supporting wall 13 but also towards the insert 23 and constrains the insert 23 to rest against the supporting corner 15.
  • the twofold inclination permits safer and longer-lasting anchorage in the long term even when there are vibrations.
  • the resisting block 318 comprises a hollow which enables the two sides A and B of the block itself to bend in relation to each other, whereby the side B is able to lodge the head 30 of the screw 230, whereas the side A can lodge the threaded part 130 thereof.
  • the opposing surfaces 22-122 are rounded or crown-shaped; it can be envisaged that the sliding surfaces 31 between the body 218 and body 217 may possibly have a special shape, and so forth.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Clamps And Clips (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Specific Conveyance Elements (AREA)
  • Toys (AREA)
  • Supports Or Holders For Household Use (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Turning (AREA)

Claims (8)

1. Outil rotatif pour l'usinage à grande vitesse du bois, des matières plastiques ou métaux légers, comprenant un porte-outil (10) et une pluralité d'éléments rapportés coupants interchangeables (23), le porte-outil présentant une pluralité d'espaces de logement (11) qui s'élargissent à leur périphérie en direction du centre du porte-outil (10), chaque espace de logement comprenant une portée épaulée (14) pour un élément rapporté, vers l'arrière relativement au sens normal de rotation de l'outil; un corps de serrage (17, 117,217) logé dans chaque espace de logement et coopérant avec des moyens (25) pour retenir positivement chaque élément rapporté dans le sens allant radialement vers l'extérieur; au moins un bloc résistant (18, 118, 218, 318) logé dans chaque espace de logement; une vis de réglage (19, 119, 130) destinée à fournir un mouvement entre chaque bloc résistant et son corps de serrage respectif de manière que, par réaction sur les parois de l'espace de logement, une poussée se produise dans la direction périphérique du porte-outil, pour appliquer le bloc résistant contre une paroi opposée (12) de l'espace de logement et appliquer le corps de serrage contre l'élément rapporté; caractérisé en ce que chaque vis de réglage peut être manoeuvrée pour provoquer un mouvement d'écartement entre un corps de serrage précité et au moins un bloc résistant précité, pour produire, premièrement, ladite poussée et, deuxièmement, une composante de force dirigée généralement vers l'intérieur, vers le centre du porte-outil, et appliquée à l'élément rapporté au moyen d'au moins les moyens de retenue, de façon à retenir positivement l'élément rapporté radialement contre l'épaulement de la portée épaulée.
2. Outil rotatif selon la revendication 1, dans lequel le corps de serrage (17) comprend un évidement longitudinal (32) sensiblement normal à la paroi opposée (12) et présentant deux surfaces inclinées opposées (22) disposées en contre contrepartie l'une de l'autre.
3. Outil rotatif selon les revendications 1 et 2, dans lequel deux blocs résistants (18) logés dans l'évidement longitudinal (32) coopèrant avec des surfaces opposées (122) et avec une vis de réglage (19) qui possède un filetage à droite et un filetage à gauche.
4. Outil rotatif selon la revendication 3, dans lequel le corps de serrage (17) coopère avec des moyens du type épingle de sécurité (26, 127), qui fixent la vis de réglage (19) et font avantageusement saillie dans la partie inférieure du corps des serrage (17) pour coopérer avec le fond de l'espace de logement (11).
5. Outil rotatif selon la revendication 4, dans lequel les moyens formant épingle de sécurité (27) coopèrent avec des moyens annulaires d'ancrage (20) prévus sur la vis de réglage (19).
6. Outil rotatif selon la revendication 3, dans lequel la vis de réglage (19) coopère, sur son côté avec des moyens (21) formant un évidement d'ancrage longitudinal qui sont ménagés dans le corps de serrage (17).
7. Outil rotatif selon la revendication 1, dans lequel le bloc résistant (218) est prévu an nombre d'un et coopère, dans une position avancée dans le sens du mouvement, avec le corps de serrage (17) sous l'action de la vis de réglage (119), et avec des côtés (31) disposés face à face et coulissants (Figures 5 et 6).
8. Outil rotatif selon la revendication 1, dans lequel le bloc résistant (318) comprend deux côtés (A-B) présentant entre eux un évidement (29) et qui sont rapprochés l'un de l'autre par la vis de réglage (219), et possède des côtés obliques (131) coopérant avec le corps de serrage 217) à la façon de coins (figures 7 et 8).
EP82830097A 1981-05-11 1982-04-19 Outil rotatif pour l'usinage à grande vitesse de bois, matières plastiques ou métaux légers Expired EP0065496B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82830097T ATE18367T1 (de) 1981-05-11 1982-04-19 Drehwerkzeug fuer das schnellschnittbearbeiten von holz, kunststoffen oder leichtmetallen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8337881 1981-05-11
IT83378/81A IT1147492B (it) 1981-05-11 1981-05-11 Mezzi di bloccaggio degli inserti negli utensili rotanti

Publications (3)

Publication Number Publication Date
EP0065496A2 EP0065496A2 (fr) 1982-11-24
EP0065496A3 EP0065496A3 (en) 1983-05-04
EP0065496B1 true EP0065496B1 (fr) 1986-03-05

Family

ID=11320991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82830097A Expired EP0065496B1 (fr) 1981-05-11 1982-04-19 Outil rotatif pour l'usinage à grande vitesse de bois, matières plastiques ou métaux légers

Country Status (6)

Country Link
EP (1) EP0065496B1 (fr)
AT (1) ATE18367T1 (fr)
DE (1) DE3269560D1 (fr)
ES (1) ES274453Y (fr)
IT (1) IT1147492B (fr)
PT (1) PT74867B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1181163B (it) * 1984-02-08 1987-09-23 Stark Spa Sistema di fissaggio degli inserti negli utensili rotanti
FR2564028B1 (fr) * 1984-05-10 1988-04-15 Fontaine Bernard Dispositif de fixation des lames interchangeables sur porte-outil de machines a bois
DE3636618A1 (de) * 1986-10-28 1988-05-05 Babcock Bsh Ag Messerwelle
DE3915479C2 (de) * 1989-05-11 1997-08-14 Schrammel Helmut Messerkopf, insbesondere für Holz- und Kunststoffbearbeitungsmaschinen mit wenigstens einem Messer od. dgl., das an einer Spannfläche in einer Ausnehmung des Werkzeugträgers anliegt
FR2744659B1 (fr) * 1996-02-08 1998-04-30 Bridonneau Ets Systeme de fixation d'une plaquette sur un outil de coupe rotatif
AT2192U1 (de) * 1997-07-22 1998-06-25 Aigner Werkzeuge Ges M B H Messerkopf für eine fräsvorrichtung

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229751C (fr) *
DE366560C (de) * 1919-02-15 1923-01-06 Karl Boellert Messerbefestigung an Messerwellen und Messerkoepfen zur Holzbearbeitung
US1527650A (en) * 1922-10-26 1925-02-24 James B Hunt Rotary cutting tool
GB393669A (en) * 1931-12-15 1933-06-15 Philip Harris Improvements relating to wood-working machines
DE617874C (de) * 1935-11-20 1936-09-05 Maschb Leya A G Vorrichtung zum Halten der Messer in der Messerwelle fuer Hobelmaschinen
DE918710C (de) * 1949-07-26 1954-10-04 Josef Abele Schlitz-Fraesscheibe fuer Holzbearbeitung
DE839556C (de) * 1950-06-29 1952-05-23 Boettcher & Gessner Hobelmesserwelle fuer Holzbearbeitung mit Keileinspannung
DE858602C (de) * 1951-07-05 1952-12-08 Heinrich Gensheimer & Soehne M Sicherheitsmesserwelle
DE1111368B (de) * 1958-03-21 1961-07-20 Rohde & Doerrenberg Messerbefestigung mittels Keilwirkung in Zerspannungswerkzeugen mit auswechselbaren Messern
GB890427A (en) * 1959-09-22 1962-02-28 Womersley & Broadbent Ltd Rotary cutter blocks for the working of wood, metal and other suitable materials
DE7602409U1 (de) * 1976-01-29 1976-12-09 Ledermann + Co, 7240 Horb Einbauhalter fuer ein schneidwerkzeug
DE2917079A1 (de) * 1979-04-27 1980-10-30 Kloeckner Gmbh & Co Geb Messerbefestigung an zerkleinerungsmaschinen mit umlaufenden schneidmessern

Also Published As

Publication number Publication date
DE3269560D1 (en) 1986-04-10
ES274453U (es) 1984-10-01
EP0065496A3 (en) 1983-05-04
ATE18367T1 (de) 1986-03-15
IT1147492B (it) 1986-11-19
ES274453Y (es) 1985-04-01
EP0065496A2 (fr) 1982-11-24
PT74867B (en) 1983-11-22
IT8183378A0 (it) 1981-05-11
PT74867A (en) 1982-06-01

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