EP0261090B1 - Procédé et dispositif de sciage - Google Patents

Procédé et dispositif de sciage Download PDF

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Publication number
EP0261090B1
EP0261090B1 EP87850188A EP87850188A EP0261090B1 EP 0261090 B1 EP0261090 B1 EP 0261090B1 EP 87850188 A EP87850188 A EP 87850188A EP 87850188 A EP87850188 A EP 87850188A EP 0261090 B1 EP0261090 B1 EP 0261090B1
Authority
EP
European Patent Office
Prior art keywords
sawing
work piece
saw blade
movement
saw
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 - Lifetime
Application number
EP87850188A
Other languages
German (de)
English (en)
Other versions
EP0261090A3 (en
EP0261090A2 (fr
Inventor
Bruno Linnér
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.)
Raute Wood Processing Machinery Oy
Original Assignee
Raute Wood Processing Machinery Oy
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 Raute Wood Processing Machinery Oy filed Critical Raute Wood Processing Machinery Oy
Publication of EP0261090A2 publication Critical patent/EP0261090A2/fr
Publication of EP0261090A3 publication Critical patent/EP0261090A3/en
Application granted granted Critical
Publication of EP0261090B1 publication Critical patent/EP0261090B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B3/00—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks
    • B27B3/02—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks with vertically-reciprocating saw frame
    • B27B3/12—Mechanisms for producing the reciprocating movement of the saw frame; Arrangements for damping vibration; Arrangements for counter-balancing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B3/00—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks

Definitions

  • the present invention relates to a method and to means in sawing, preferably in frame sawing.
  • Frame sawing is a technique used for more than 100 years to saw timber length wise. With “high speed” frames up to 400 strokes/minute is used and about 60 pieces of 5 m long and at the top side 12" thick pine logs can be sawn each hour. A continous feeding of the work piece made it necessary to tilt the saw blades. The "over cutting” arising from this tilting of the blades was tried to be kept at about 55 % of the feeding for each stroke to avoid the blades from to much dragging at initial movement upwards. The sawing took place during just one of the two movements of the frame.
  • the british patent no 1879 from 1874 discloses a frame saw using the two movements of the frame for sawing. This patent describes how slides are tilted to guide the movement of the loose frame to split the saw cut in such a way that sawing is obtained in each direction over just half the work piece in a direction from its middle out towards the edge surfaces. This movement of the saw blades is very unsuitable when sawing e.g. veneer.
  • the british patent 1.187.892 discloses a frame saw technique where the movement of the loose frame is established by two cranks. The sawing movement thus obtained gives the blades a sawing action from one of the edge surfaces towards the centre of the work piece, i.e. this technique should be better suited for sawing e.g. veneer as the splinter of wood at the release side of the blades at least theoretically ought to decrease.
  • this fram sawing technique has shown to be hard to handle in the running production.
  • the swedish patent application 8303296-1 discloses a "power saw", in fact a fram saw technique where the loose frame is guided along tilted slides, their relative angular setting "range between 5° and 45°, preferably between 15° and 25°".
  • their relative angular setting range between 5° and 45°, preferably between 15° and 25°.
  • the preamble of claim 1 is based onto the prior art according to FR-A-320 788.
  • the main object of the present invention is to obtain a sawing technique making it possible to use fram sawing of extremely thin sheets from a work piece continously fed through a loose fram.
  • An other object of the invention is to obtain a sawing technique admitting optimal sawing purposes for different kind of tree species.
  • Still an other object of the present invention is to obtain a sawing technique giving very smooth cutting surfaces also when sawing extremely thin sheets from a work piece.
  • the feeding speed of the work piece automatically adjustable, in one hand in relation to the size of the moving distance of the saw blade towards the work piece and in the other hand in relation to the cutting machinability of the work piece, it is easy to obtain optimal working conditions for different kind of tree species.
  • the other end position is shown, i.e. the position from which the working from the other direction is to be started.
  • the "ideal" position has been shown in the figures, i.e. the position where the working is equal at both cutting sections.
  • the cutting sections When sawing a bigger dimensioned work piece, i.e. where the hight is increased and with the same setting of the feeding table, the cutting sections will be of different size as the centre line of the work piece will be situated above the centre of the saw blade when this is in a neutral position perpendicular to the work piece.
  • the feeding table is suitably arranged adjustable in several positions.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Feeding Of Workpieces (AREA)
  • Harvester Elements (AREA)

Claims (1)

  1. Méthode de sciage avec au moins une lame de scie où le sciage est fait dans les deux directions de sciage et où la lame de scie pendant son mouvement est forcée à faire un mouvement tournant par des glissières arrangées dans un jeu angulaire et simultanément la pièce à travailler est continuellement pressée contre la lame de scie et où le mouvement de la lame de scie par son guidage forcant le long des glissières est obtenue afin que la partie le plus en arrière de la lame - vue dans volante direction - bouge contre la pièce à travailler pendant que la partie de devant de la lame bouge loin de la pièce à travailler, en cela caractérisée que la proportion entre le mouvement de la lame de scie contre respectivement loin de la pièce à travailler et le mouvement total de la lame de scie pendant un cycle de sciage est dans la région de 7:100 - 1:100 et que la proportion entre l'avance de la pièce à travailler et le mouvement de la lame de scie est dans la région de 4:100 - 1:100.
EP87850188A 1986-06-12 1987-06-10 Procédé et dispositif de sciage Expired - Lifetime EP0261090B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8602627 1986-06-12
SE8602627A SE459328B (sv) 1986-06-12 1986-06-12 Anordning vid saagning

Publications (3)

Publication Number Publication Date
EP0261090A2 EP0261090A2 (fr) 1988-03-23
EP0261090A3 EP0261090A3 (en) 1990-04-25
EP0261090B1 true EP0261090B1 (fr) 1994-09-28

Family

ID=20364794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87850188A Expired - Lifetime EP0261090B1 (fr) 1986-06-12 1987-06-10 Procédé et dispositif de sciage

Country Status (4)

Country Link
EP (1) EP0261090B1 (fr)
AT (1) ATE112205T1 (fr)
DE (1) DE3750604T2 (fr)
SE (1) SE459328B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1458534A1 (fr) * 2001-12-19 2004-09-22 Fachhochschule Furtwangen Dispositif de separation et procede pour produire des contacts ponctuels

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR320788A (fr) * 1902-04-30 1902-12-19 Moutheau Felix Scie alternative à lame oscillante
DE1453181A1 (de) * 1962-03-28 1969-03-27 Wurster & Dietz Maschinenfabri Gattersaege mit Stetigvorschub,Saegenvorhang und Rueckschwingrahmen
GB1187892A (en) * 1967-04-11 1970-04-15 Tarkett Ab Improvements in or relating to Frame Sawing Machines.

Also Published As

Publication number Publication date
DE3750604T2 (de) 1995-05-18
SE8602627L (sv) 1987-12-13
EP0261090A3 (en) 1990-04-25
DE3750604D1 (de) 1994-11-03
EP0261090A2 (fr) 1988-03-23
SE8602627D0 (sv) 1986-06-12
ATE112205T1 (de) 1994-10-15
SE459328B (sv) 1989-06-26

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