EP0073595A2 - Ensemble d'outil rotatif - Google Patents

Ensemble d'outil rotatif Download PDF

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Publication number
EP0073595A2
EP0073595A2 EP82304323A EP82304323A EP0073595A2 EP 0073595 A2 EP0073595 A2 EP 0073595A2 EP 82304323 A EP82304323 A EP 82304323A EP 82304323 A EP82304323 A EP 82304323A EP 0073595 A2 EP0073595 A2 EP 0073595A2
Authority
EP
European Patent Office
Prior art keywords
blade
wedge
cutter head
backing plate
rotary cutter
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.)
Granted
Application number
EP82304323A
Other languages
German (de)
English (en)
Other versions
EP0073595A3 (en
EP0073595B1 (fr
Inventor
Peter Malcolm Colton
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.)
Wadkin PLC
Original Assignee
Wadkin PLC
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 Wadkin PLC filed Critical Wadkin PLC
Publication of EP0073595A2 publication Critical patent/EP0073595A2/fr
Publication of EP0073595A3 publication Critical patent/EP0073595A3/en
Application granted granted Critical
Publication of EP0073595B1 publication Critical patent/EP0073595B1/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 relates to rotary cutter heads for woodworking machinery, and provides a novel method of blade anchorage and adjustment for such cutter heads.
  • the tightening bolts can of course be slackened further until the respective serrations on the blade and block can ride over one another, but this also can be time-consuming as the blades have to be held manually in axial alignment with the serrations on the block while the tightening screws or bolts are re-tightened to cause re-engagement of the respective serrations.
  • This invention provides a rotary cutter head for woodworking machinery, comprising a cutterblock body formed with a number of inwardly divergent recesses each receiving a cutter blade held therein by clamp means wherein each clamp means comprises a wedge and associated screw means for clamping the cutter blade in the.recess, and each clamp means incorporates at least one resilient means extending partially from a recess in the wedge to hold the cutter blade lightly in position on slackening of the screw means.
  • the rear facesof the blades are axially serrated and cooperate with mating serrations in a backing plate that is keyed to the cutterblock and can be advanced incrementally therefrom.
  • the incremental advancement must be achieved while maintaining the entire cutterblock assembly in precise balance, and one very satisfactory method is by using a rotary cam member on the cutterblock body, cooperating with a cam slot in the backing plate to move the backing plate incrementally over a distance of at least half the pitch of the serrations on the blade and backing plate.
  • the maximum accuracy of adjustment is achieved when the range of movement of the backing plate is exactly half the pitch of the serrations, but for operator convenience the range of movement is preferably a complete pitch, and cooperating markings are preferably provided on the cam and the cutterblock body to provide a visual check on the angle of rotation of the cam and thus the extent of advancement of the associated blade from the cutterblock body. This visual check is important for balancing purposes, since it would otherwise be possible to have one backing plate fully advanced from the cutterblock body and the other fully withdrawn, while the blades came to the same radii by engagement of different sets of serrations with the respective backing plates.
  • Figure 1 is a side elevation, partly sectioned, of a rotary cutter head according to the invention
  • Figure 2 is a staggered section taken along the line 2-2 of Figure 1
  • Figure 3 is a detail from an end elevation of the cutter head, viewed in the direction of arrow 3 of Figure 2.
  • FIG. 1 shows a rotary cutterblock 10 having four blade-receiving recesses 12 equally spaced around .its periphery.
  • a blade assembly is clamped ready for use, whereas in another, labelled B, a similar blade assembly is shown unclamped for adjustment.
  • the other two klade-receiving recesses are shown schematically only, and in use would receive identical blade assemblies.
  • Positive location of the blade 14 in use is achieved by cooperating axial serrations.23 on the rear face of the blade and the forwardly facing face of the backing plate 16.
  • Axial alignment of the backing plate is achieved by keying it to the cutter block 10 through side flanges 24 ( Figure 2) of the backing plate 16 which are received in milled slots 26 ( Figure 1) in the cutterblock.
  • each wedge 18 contains a pair of recess ball catches 28 each comprising a flanged cylindrical housing 30 containing a captive spring 32 and ball 34.
  • the springs 32 are compressed and the balls 34 wholly received within the housing 30 when the wedge 18 is clamped against the blade 14.
  • the screw 20 is slackened the springs 32 move the wedge 18 away from the blade 14 as shown at B in Figure 1. This lightly maintains the blade 14 in its operative position, but permits outward movement of the blade from the recess 12, while the serrations on the blade 14 and backing plate 16 ride over one another, in a manner which involves the minimum of manipulation by the operator.
  • Incremental adjustment of the blades 14 can be achieved utilizing an eccentric cam 40 which can be turned by means of a screwdriver slot 42.
  • the cam has a cylindrical body and an eccentric end portion 46 which is received in an elongate blind milled slot 48 in the rear face of the backing plate 16.
  • the extent of movement of the backing plate 16 that can be achieved by means of the cam 40 is one serration pitch (although the eccentricity of the cam is exaggerated in the drawings for illustrative purposes) so that a fully continuous range of blade positionsis obtainable by different combinations of cam rotational positions and interengagement of different serrations of the blade and backing plate.
EP19820304323 1981-08-22 1982-08-17 Ensemble d'outil rotatif Expired EP0073595B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8125950 1981-08-22
GB8125950 1981-08-22

Publications (3)

Publication Number Publication Date
EP0073595A2 true EP0073595A2 (fr) 1983-03-09
EP0073595A3 EP0073595A3 (en) 1984-03-21
EP0073595B1 EP0073595B1 (fr) 1986-11-05

Family

ID=10524162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820304323 Expired EP0073595B1 (fr) 1981-08-22 1982-08-17 Ensemble d'outil rotatif

Country Status (2)

Country Link
EP (1) EP0073595B1 (fr)
DE (1) DE3274077D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095912A2 (fr) * 1982-06-01 1983-12-07 Harris Graphics Corporation Support pour lames
EP0345570A1 (fr) * 1988-06-07 1989-12-13 HAPRO GmbH Dispositif pour le fixage amovible de couteau en métal dur sur têtes tournantes pour travailler le bois ou matériel similaire
EP1080855A2 (fr) * 1999-09-06 2001-03-07 TIGRA Hartstoff GmbH Agencement permettant de serrer des plaquettes de coupe en métal dur dans des têtes de fraisage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9802334B2 (en) 2014-07-10 2017-10-31 Kimwood Corporation Cutter head assembly for a knife planer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189409A (en) * 1922-07-14 1922-11-30 Thomas Robinson & Son Ltd Improvements in or relating to cutter blocks for use in machines for planing wood and analogous machines
US3017912A (en) * 1958-10-01 1962-01-23 Hombak Maschinenfab Kg Blade structure and mounting means for a cylinder type cutter
GB893198A (en) * 1959-10-19 1962-04-04 Stanley Frederick Smith Improvements in or relating to rotary cutter heads
CH403278A (de) * 1961-01-07 1965-11-30 Wilhelm Grupp Werkzeug Und Mas Messerwelle
DE2128797A1 (de) * 1970-06-09 1972-01-27 Wadkin Ltd., Leicester (Grossbritannien) Fräser für Holzbearbeitungsmaschinen und ähnliche Maschinen
US4068694A (en) * 1975-07-14 1978-01-17 Hombak Maschinenfabrik Kg Cutter shaft for wood machining apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189409A (en) * 1922-07-14 1922-11-30 Thomas Robinson & Son Ltd Improvements in or relating to cutter blocks for use in machines for planing wood and analogous machines
US3017912A (en) * 1958-10-01 1962-01-23 Hombak Maschinenfab Kg Blade structure and mounting means for a cylinder type cutter
GB893198A (en) * 1959-10-19 1962-04-04 Stanley Frederick Smith Improvements in or relating to rotary cutter heads
CH403278A (de) * 1961-01-07 1965-11-30 Wilhelm Grupp Werkzeug Und Mas Messerwelle
DE2128797A1 (de) * 1970-06-09 1972-01-27 Wadkin Ltd., Leicester (Grossbritannien) Fräser für Holzbearbeitungsmaschinen und ähnliche Maschinen
US4068694A (en) * 1975-07-14 1978-01-17 Hombak Maschinenfabrik Kg Cutter shaft for wood machining apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095912A2 (fr) * 1982-06-01 1983-12-07 Harris Graphics Corporation Support pour lames
EP0095912B1 (fr) * 1982-06-01 1988-03-23 Harris Graphics Corporation Support pour lames
EP0345570A1 (fr) * 1988-06-07 1989-12-13 HAPRO GmbH Dispositif pour le fixage amovible de couteau en métal dur sur têtes tournantes pour travailler le bois ou matériel similaire
EP1080855A2 (fr) * 1999-09-06 2001-03-07 TIGRA Hartstoff GmbH Agencement permettant de serrer des plaquettes de coupe en métal dur dans des têtes de fraisage
EP1080855A3 (fr) * 1999-09-06 2005-08-31 TIGRA Hartstoff GmbH Agencement permettant de serrer des plaquettes de coupe en métal dur dans des têtes de fraisage

Also Published As

Publication number Publication date
DE3274077D1 (en) 1986-12-11
EP0073595A3 (en) 1984-03-21
EP0073595B1 (fr) 1986-11-05

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