EP0455196A2 - Dispositif de serrage pour plusieurs plaquettes de coupe, en particulier pour les outils à travailler le bois et similaire - Google Patents

Dispositif de serrage pour plusieurs plaquettes de coupe, en particulier pour les outils à travailler le bois et similaire Download PDF

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Publication number
EP0455196A2
EP0455196A2 EP91106923A EP91106923A EP0455196A2 EP 0455196 A2 EP0455196 A2 EP 0455196A2 EP 91106923 A EP91106923 A EP 91106923A EP 91106923 A EP91106923 A EP 91106923A EP 0455196 A2 EP0455196 A2 EP 0455196A2
Authority
EP
European Patent Office
Prior art keywords
insert
fixing structure
respect
fixing
locking element
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Withdrawn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
EP91106923A
Other languages
German (de)
English (en)
Other versions
EP0455196A3 (en
Inventor
Roberto Zuani
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.)
ZUANI Srl
Original Assignee
ZUANI Srl
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 ZUANI Srl filed Critical ZUANI Srl
Publication of EP0455196A2 publication Critical patent/EP0455196A2/fr
Publication of EP0455196A3 publication Critical patent/EP0455196A3/en
Withdrawn legal-status Critical Current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

  • the present invention relates to a multiple-cutter insert fixing structure, particularly for wood-working tools and the like.
  • a tool body 1 in which a seat 2 is defined and accommodates a locking element 3.
  • Said element 3 has a pin 4 for locking a multiple-cutter insert 5.
  • the element 3 is fixed in the seat 2 by means of a fixing screw 6 which is arranged ahead of the multiple-cutter insert with respect to the tool cutting direction.
  • the element 3 and the surface of the tool which is adjacent to the seat 2 are shaped so as to define a groove 7 for the escape and removal of the shaving produced by the insert 5.
  • the front placement of the fixing screw 6 compromises the escape of the shavings from the groove 7, since said shavings linger in said groove 7.
  • FIG. 2 In order to try to obviate this type of disadvantage, another type of fixing structure, illustrated in figure 2, has been proposed; said structure has a tool 10 provided with an accommodation seat 11 for the locking element 12.
  • the element 12 is fixed to the tool 10 by means of a screw 16.
  • a blind hole 13 is defined in the tool 10, inside the seat 11, for accommodating a pin 14 for locking the multiple-cutter insert 15.
  • a groove 17 for collecting and eliminating the shavings is provided directly in front of the multiple-cutter insert 15 with respect to the cutting direction of the tool 10.
  • This type of structure is furthermore difficult to assemble on low-thickness tools, and the use of said structure in the working of highly abrasive materials causes cavitation phenomena in the groove 17, proximate to the insert 15.
  • the aim of the invention is indeed to solve the above problems by providing a multiple-cutter insert fixing structure particularly for wood-working tools and the like, which achieves excellent elimination of the shavings from the surface of the tool.
  • a particular object of the invention is to provide a fixing structure which significantly reduces the possibility of damage to the fixing structure in case of breakage of a multiple-cutter insert.
  • Another object of the present invention is to provide a fixing structure which allows to replace the multiple-cutter insert very easily and rapidly.
  • Not least object of the present invention is to provide a fixing structure which can be easily obtained starting from commonly commercially available elements and materials and which furthermore has a competitive cost.
  • a multiple-cutter insert fixing structure particularly for wood-working tools and the like, which comprises a tool which defines a seat for the accommodation of an element for locking a multiple-cutter insert, said locking element defining a cavity for the insertion of a pin for fixing said element, characterized in that the outer ends of said fixing pin and of said locking element define at least one portion of the groove for the escape and removal of the shaving produced by said multiple-cutter insert.
  • Said locking element is shaped complementarily with respect to the seat 21, and it is substantially shaped like a truncated cone, with a surface 25 which acts against the multiple-cutter insert 23 and is inclined substantially at 30° with respect to the axis of said element, whereas the opposite surface 26 for abutment with the seat advantageously has an inclination of 10° with respect to the axis of said element.
  • the locking element 22 has, on its surface 25, a blind hole 27 in which a dowel 28 can be inserted; said dowel engages a hole 29 which is defined in the insert 23 to lock it against the retention wall 30 of the seat 21.
  • a recess 31 is furthermore provided on the surface 25 at the inner end thereof and prevents the possible breakage of the other cutter of the insert 23 during its fixing.
  • An axial through cavity 40 is defined inside the locking element 22, and a fixing pin 41 is insertable therein; said fixing pin has a shaped head 42 which ensures a single possibility of placement of said pin with respect to the element and which furthermore, at its outer surface, has a configuration which is shaped complementarily with respect to the configuration of the outer surface of the locking element 22.
  • the fixing pin 41 has a stem 43 with an annular groove 44 in which a locking snap-ring 45 can be inserted; said ring allows to define a monolithic unit between the element and the pin when said pin is inserted in the element.
  • the stem 43 of the pin 41 is accommodated in a blind hole 47 which is defined on the axial extension of the seat 21.
  • a threaded hole 50 is defined on the body 20, leads into the blind hole 47 and is suitable for accommodating a locking dowel 51 which, by means of its inner end 52, engages a fixing notch 53 which is defined on the stem of the pin 41 so as to perform locking.
  • the inner end 52 of said dowel presses on the surface 53 of the notch, causing the sliding of the pin in the blind hole which generates traction on the locking element 21, which is thus moved so as to tightly lock the multiple-cutter insert 23.
  • An important peculiarity of the invention is constituted by the fact that the locking element 22 and the head 42 of the fixing pin 41 define a portion of the groove 60 which is arranged ahead of the multiple-cutter tool with respect to the working direction and has the function of allowing the escape and removal of the shaving.
  • the force F which is applied to the fixing dowel 51 is decomposed into the components F1 and F2, which generate a traction force on the pin 41 and accordingly on the locking element 22.
  • the conical element 22 develops a pair of forces F3 and F4 in which the force F3 is produced by the conical surface which is inclined at 30° with respect to the traction axis and acts on the insert 23.
  • the force F4 derives from the surface which is inclined at 10° with respect to the traction axis and acts on the body of the tool in the seat 21.
  • the invention achieves the intended aim and objects, and in particular the fact is stressed that a fixing structure is provided in which the outer surface of the locking element and its fixing pin have such a configuration as to be themselves a part of the groove for the escape and removal of the shaving, without creating possible lingerings and blending with the remaining part of the groove, which is defined directly by the tool.
  • Another important aspect of the invention is constituted by the fact that the particular configuration of the element, which has opposite faces with an asymmetrical inclination with respect to the axis, allows to define a safe and stable locking.
  • Another important aspect is furthermore constituted by the fact that the locking screw or dowel is arranged after the insert with respect to the working direction, so that the screw is always completely clean, with great ease of access.
  • the materials employed may be any according to the requirements.

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)
  • Mutual Connection Of Rods And Tubes (AREA)
EP19910106923 1990-05-03 1991-04-29 Multiple-cutter insert fixing structure, particularly for wood-working tools and the like Withdrawn EP0455196A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2109990U 1990-05-03
IT2109990U IT219510Z2 (it) 1990-05-03 1990-05-03 Struttura di fissaggio di inserti multitagliente particolarmente per utensili per la lavorazione del legno e affini

Publications (2)

Publication Number Publication Date
EP0455196A2 true EP0455196A2 (fr) 1991-11-06
EP0455196A3 EP0455196A3 (en) 1992-05-27

Family

ID=11176726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910106923 Withdrawn EP0455196A3 (en) 1990-05-03 1991-04-29 Multiple-cutter insert fixing structure, particularly for wood-working tools and the like

Country Status (2)

Country Link
EP (1) EP0455196A3 (fr)
IT (1) IT219510Z2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4228896A1 (de) * 1991-09-02 1993-03-04 Feininger Karl Heinz Bearbeitungswerkzeug fuer holz, kunststoff oder dergleichen
AT2192U1 (de) * 1997-07-22 1998-06-25 Aigner Werkzeuge Ges M B H Messerkopf für eine fräsvorrichtung
EP1325798A1 (fr) * 2001-04-17 2003-07-09 Hu Teng-Fu Outil coupant pour raboteuse pour travailler le bois
KR100497647B1 (ko) * 2003-03-18 2005-07-01 대구텍 주식회사 블레이드 쓰로-어웨이형 드릴

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1462877A (fr) * 1966-01-04 1966-12-16 Système de butées et de montage des dents pour une fraise à dents rapportées
DE1921532A1 (de) * 1968-06-04 1970-01-29 Skoda Np Vorrichtung zum Einspannen austauschbarer Mehrfach-Schneidplatten in Fraeser
GB2057940A (en) * 1979-09-01 1981-04-08 Hertal G Cutting tool, e.g. a slot cutter or a broach
EP0122334A2 (fr) * 1983-01-13 1984-10-24 Kennametal Inc. Fraise et méthode pour son assemblage
DE3642137A1 (de) * 1986-12-10 1988-06-16 Guhdo Werkzeugdienst Gmbh Hochleistungsfraeswerkzeug fuer auswechselbare schneidplatten mit fliehkraftunterstuetztem sicherheitsspannsystem

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1462877A (fr) * 1966-01-04 1966-12-16 Système de butées et de montage des dents pour une fraise à dents rapportées
DE1921532A1 (de) * 1968-06-04 1970-01-29 Skoda Np Vorrichtung zum Einspannen austauschbarer Mehrfach-Schneidplatten in Fraeser
GB2057940A (en) * 1979-09-01 1981-04-08 Hertal G Cutting tool, e.g. a slot cutter or a broach
EP0122334A2 (fr) * 1983-01-13 1984-10-24 Kennametal Inc. Fraise et méthode pour son assemblage
DE3642137A1 (de) * 1986-12-10 1988-06-16 Guhdo Werkzeugdienst Gmbh Hochleistungsfraeswerkzeug fuer auswechselbare schneidplatten mit fliehkraftunterstuetztem sicherheitsspannsystem

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4228896A1 (de) * 1991-09-02 1993-03-04 Feininger Karl Heinz Bearbeitungswerkzeug fuer holz, kunststoff oder dergleichen
AT2192U1 (de) * 1997-07-22 1998-06-25 Aigner Werkzeuge Ges M B H Messerkopf für eine fräsvorrichtung
EP1325798A1 (fr) * 2001-04-17 2003-07-09 Hu Teng-Fu Outil coupant pour raboteuse pour travailler le bois
KR100497647B1 (ko) * 2003-03-18 2005-07-01 대구텍 주식회사 블레이드 쓰로-어웨이형 드릴

Also Published As

Publication number Publication date
IT9021099V0 (it) 1990-05-03
IT219510Z2 (it) 1993-03-17
IT9021099U1 (it) 1991-11-03
EP0455196A3 (en) 1992-05-27

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