EP1719595A1 - Tête de coupe pour l'usinage de bois avec système de blocage du couteau pivotant - Google Patents

Tête de coupe pour l'usinage de bois avec système de blocage du couteau pivotant Download PDF

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Publication number
EP1719595A1
EP1719595A1 EP05009673A EP05009673A EP1719595A1 EP 1719595 A1 EP1719595 A1 EP 1719595A1 EP 05009673 A EP05009673 A EP 05009673A EP 05009673 A EP05009673 A EP 05009673A EP 1719595 A1 EP1719595 A1 EP 1719595A1
Authority
EP
European Patent Office
Prior art keywords
clamping element
clamping
cutter head
knife
blade plate
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Withdrawn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
EP05009673A
Other languages
German (de)
English (en)
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.)
Utensilea Sas Di Santarossa De Marco & C
Original Assignee
Utensilea Sas Di Santarossa De Marco & C
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 Utensilea Sas Di Santarossa De Marco & C filed Critical Utensilea Sas Di Santarossa De Marco & C
Priority to EP05009673A priority Critical patent/EP1719595A1/fr
Publication of EP1719595A1 publication Critical patent/EP1719595A1/fr
Withdrawn legal-status Critical Current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
    • 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

  • the invention relates to a cutter head for woodworking with the features of the preamble of claim 1.
  • a cutter head consists of a base body which is provided at its circumference with equal circumferential distances recesses for receiving knives and associated clamping devices.
  • a cutter head having the features of the preamble of claim 1 is known from EP-0 652 816 B known.
  • each recess of the base body has a contact surface against which a knife to be clamped rests with a surface.
  • the seated in the recess respective clamping element is tiltably inserted with an inner end portion about a pivot axis parallel to the pivot axis of the body pivot axis and is clamped by a clamping screw against the other surface of the knife.
  • a disadvantage of the known arrangement is the fact that the under the radially inner edge of the knife passing through the clamping screw with its axis extends only a small distance from the even further radially inwardly lying tilting axis of the clamping element, said distance only a small fraction of the radial Expansion of the clamping element and the knife makes. Therefore, the known device works with unfavorable leverage.
  • the clamping screw lying close to the tilt axis of the knife must exert a large tensile force on the radially inner region of the clamping element, so that the much further radially outward areas of the clamping element can hold the knife with a sufficient clamping force.
  • the arrangement is such that the knife rests with its back surface on the support surface of the base body and biases the clamping element against the front surface of the knife.
  • the cutting pressure acts rectified with the clamping pressure of the clamping element and supports it.
  • the object of the invention is to provide a cutter head of the type specified in the preamble of claim 1, in which the clamping force ratios of the knife clamping system are designed substantially cheaper and in particular allows an arrangement of the knife plate in the cutter head, wherein each knife with its back surface on the Contact surface of the body rests and the clamping element acts against the front surface of the knife, since the support of the knife in operation on its rear by the contact surface of the body embodies the optimal arrangement.
  • the clamping screw is oriented approximately parallel to the clamping direction
  • the clamping screw is oriented almost perpendicular to the clamping direction in the inventive arrangement
  • the clamping screw is designed as a pressure screw. Its distance from the tilting axis of the clamping element is about the same as the center distance of the blade from the tilting axis of the clamping element, and it is supported on a counter surface of the base body, which forms an almost right angle or slightly less with the support surface for the knife.
  • a lever ratio of about 1: 1 is achieved for clamping the knife, so that the compressive force generated by the clamping screw comes about in the ratio 1: 1 acting as a clamping force on the knife, while in the known arrangement, the clamping force the knife due to the local lever ratio can only be a fraction of the tensile force generated by the clamping screw.
  • the cutter head according to the invention shown in the drawings has a base body 1 with a number of six circumferentially distributed in the embodiment recesses on the circumference, in each of which a knife clamping device with a clamping element 2 are used for clamping a blade plate 3 and fixed.
  • An arrow in Fig. 1 indicates the direction of rotation of the cutter head (in the clockwise direction).
  • each knife tensioning device is shown in Fig. 2 in an enlarged view and will be described below with reference to this illustration in its details.
  • a flute 12 is formed with arcuate cross section in the main body.
  • the knife clamping device comprises a clamping element 2 with an angular, that is approximately L-shaped cross-section (seen in the axial direction of the cutter head).
  • the recess in the base body 1 is formed with a corresponding, L-shaped cross-section.
  • the smaller, perpendicular to the blade plate 3 oriented leg 21 of the clamping element 2 has an approximately rectangular cross-section and fits fittingly in a correspondingly shaped Section of the recess.
  • the larger, approximately parallel to the blade plate 3 oriented leg 22 of the clamping element 2 serves as a pressure piece to produce a contact pressure against the back surface of the blade plate 3.
  • the clamping element 2 is fixed by means of at least one approximately perpendicular to the blade plate 3, that is parallel to the orientation of the smaller leg 21 extending positioning pin 4 in the body.
  • This positioning pin 4 extends through the smaller leg 21 and is inserted into a corresponding bore of the main body 1.
  • the positioning is made of flexible steel and is used for axial positioning and securing the clamping element 2 in the base body 1. It is understood that instead of a positioning pin and a positioning screw can be applied or a positioning pin which is screwed into a threaded bore of the body.
  • the positioning pin can also be provided in a different orientation, that is, for example, approximately parallel or slightly oblique to the radial orientation of the blade plate, wherein the receiving bore in the main body then in the direction of rotation front of the blade plate of the flute 12 could go out.
  • At least one clamping screw 5 is screwed into a corresponding threaded bore of the larger leg 22 of the clamping element, whose axis is approximately parallel to the radial orientation of the blade plate 3, but preferably thus forms a small acute angle.
  • the clamping screw 5 is designed as a pressure screw and is supported, when it is completely screwed and tightened, on a parallel to the plane of the screw end surface oriented counter surface 14 of the recess.
  • the at least one clamping screw 5 is completely screwed in and tightened, it is supported with its front (in Fig. 2 lower) end face on the counter surface 14 and pushes the leg 22 in the direction of the counter surface 14 away, i. the tightening of the clamping screw 5 causes a tilting of the larger leg 22 about the smaller leg 21 (clockwise in the embodiment) against the back surface of the blade plate 3 to clamp this.
  • Fig. 2 the front
  • a notch 23 is formed in the inner corner between the larger leg 22 and the smaller leg 21 of the clamping element 2, which produces a cross-sectional reduction at the junction between the two legs 21, 22, due to the elasticity of the material the clamping element acts as a joint and allows a slight angular movement between the two legs, so that the just described tilting of the leg 22 can take place when tightening the clamping screw 5 against the blade plate 3.
  • the positioning pin 4 made of flexible steel with its high elasticity promotes this elastic relative angular movement between the two legs.
  • the smaller leg 21 and the corresponding part of the recess may be formed with curved cooperating surfaces and Kippièresspiel, as is the case in the prior art described above, so that an angular rotation of the entire Clamping element 2 can be made to tilt the leg 22 against the blade plate 3.
  • the arrangement is such that the positioning pin or the positioning screw receiving opening of the clamping element allows a certain play in the tilting direction of the clamping element.
  • the angular shape of the clamping element cross section are chosen differently, so that the two legs, instead of an approximately right angle as in the embodiment form a larger angle with each other.
  • this may also be formed trapezoidal, wherein the trapezoidal shape can be either tapered towards the free leg end or even widening.
  • the latter form creates a positive connection between the corresponding part of the recess of the body and the clamping element and thus causes an exact positioning within the recess.
  • the insertion into the body is not problematic, since this must be done in the recess anyway by axial insertion of the clamping element in the illustrated embodiment.
  • the positioning screws 4 have the advantage that they position the respective clamping element 2 axially exactly in the main body and when turning the blade plate (which is preferably formed as a turntable according to the drawings) or when changing the blade plate simplifies this process and saves time.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Details Of Cutting Devices (AREA)
EP05009673A 2005-05-03 2005-05-03 Tête de coupe pour l'usinage de bois avec système de blocage du couteau pivotant Withdrawn EP1719595A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05009673A EP1719595A1 (fr) 2005-05-03 2005-05-03 Tête de coupe pour l'usinage de bois avec système de blocage du couteau pivotant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05009673A EP1719595A1 (fr) 2005-05-03 2005-05-03 Tête de coupe pour l'usinage de bois avec système de blocage du couteau pivotant

Publications (1)

Publication Number Publication Date
EP1719595A1 true EP1719595A1 (fr) 2006-11-08

Family

ID=34936077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05009673A Withdrawn EP1719595A1 (fr) 2005-05-03 2005-05-03 Tête de coupe pour l'usinage de bois avec système de blocage du couteau pivotant

Country Status (1)

Country Link
EP (1) EP1719595A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE731542C (de) * 1936-06-06 1943-02-11 Luise Maurer Geb Sprissler Umlaufender Messerhalter fuer Holzbearbeitungsmaschinen
DE2653222A1 (de) * 1975-12-08 1977-06-23 Iscar Ltd Schneidwerkzeug
GB1500556A (en) * 1976-10-12 1978-02-08 Wickman Wimet Ltd Milling cutters
FR2443318A1 (fr) * 1978-12-08 1980-07-04 Caumette Georges Outil a rainer le bois a plaquettes reversibles jetables
DE3642137A1 (de) * 1986-12-10 1988-06-16 Guhdo Werkzeugdienst Gmbh Hochleistungsfraeswerkzeug fuer auswechselbare schneidplatten mit fliehkraftunterstuetztem sicherheitsspannsystem
EP0652816B1 (fr) * 1992-08-03 1996-04-03 Gebruder Leitz Gmbh & Co Tete porte-lames, en particulier tete porte-lames a profiler

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE731542C (de) * 1936-06-06 1943-02-11 Luise Maurer Geb Sprissler Umlaufender Messerhalter fuer Holzbearbeitungsmaschinen
DE2653222A1 (de) * 1975-12-08 1977-06-23 Iscar Ltd Schneidwerkzeug
GB1500556A (en) * 1976-10-12 1978-02-08 Wickman Wimet Ltd Milling cutters
FR2443318A1 (fr) * 1978-12-08 1980-07-04 Caumette Georges Outil a rainer le bois a plaquettes reversibles jetables
DE3642137A1 (de) * 1986-12-10 1988-06-16 Guhdo Werkzeugdienst Gmbh Hochleistungsfraeswerkzeug fuer auswechselbare schneidplatten mit fliehkraftunterstuetztem sicherheitsspannsystem
EP0652816B1 (fr) * 1992-08-03 1996-04-03 Gebruder Leitz Gmbh & Co Tete porte-lames, en particulier tete porte-lames a profiler

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