EP1192027B1 - Verfahren und vorrichtung zum profilieren von baumstämen - Google Patents

Verfahren und vorrichtung zum profilieren von baumstämen Download PDF

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Publication number
EP1192027B1
EP1192027B1 EP00939747A EP00939747A EP1192027B1 EP 1192027 B1 EP1192027 B1 EP 1192027B1 EP 00939747 A EP00939747 A EP 00939747A EP 00939747 A EP00939747 A EP 00939747A EP 1192027 B1 EP1192027 B1 EP 1192027B1
Authority
EP
European Patent Office
Prior art keywords
knife
knives
cutting edge
rotation
axis
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
EP00939747A
Other languages
English (en)
French (fr)
Other versions
EP1192027A2 (de
EP1192027A4 (de
Inventor
Bradley R. Stager
John S. Luecke
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.)
Key Knife Inc
Original Assignee
Key Knife Inc
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
Priority claimed from US09/327,810 external-priority patent/US6058992A/en
Application filed by Key Knife Inc filed Critical Key Knife Inc
Publication of EP1192027A2 publication Critical patent/EP1192027A2/de
Publication of EP1192027A4 publication Critical patent/EP1192027A4/de
Application granted granted Critical
Publication of EP1192027B1 publication Critical patent/EP1192027B1/de
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
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/005—Tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/007—Combined with manufacturing a workpiece

Definitions

  • the present invention relates to a method and apparatus for profiling a log, particularly for cutting a reentrant corner in the log that extends along the log.
  • First and second knives 2 and 4 which are identical, are disposed on the circumference of a rotating disc 6.
  • a slabbed log 8 having an elongate axis "L" is fed toward the disc along a circumferential direction "d.”
  • the cutting edge of the first knife is oriented parallel to the axis of rotation of the disc and the cutting edge of the second knife is oriented in a plane of rotation of the disc.
  • the first knife cuts a first leg "11 " of a particular reentrant corner C and the second knife cuts a perpendicular, second leg “12” of the reentrant corner, wherein the legs 11 and 12 meet at a region of intersection "c1 of the corner C.
  • the legs "11" and “12” are the visible portions of planar surfaces extending along the longitudinal axis of the log.
  • Another example of a prior art profiler replaces the second knife with a sequence of cutting teeth disposed around the periphery of the disc, such as the teeth of a saw blade.
  • the first and second knives are disposed so that the first knife meets the log at a different time than does the second knife. Because there is relative movement between the disc and the log, this time difference provides an opportunity for the two cuts to fail to intersect precisely at the same corner region cl and thereby fail to form a clean or smooth corner C. In particular, there often results, running longitudinally along the corner C, "feathers" or slivers of wood partially but not completely removed from the log, or other unevenness in the surface texture of the corner. This result is often aggravated further as wear occurs in the apparatus.
  • German Patent Specification No. 25 04 012A there is disclosed a cutter assembly, particularly for notches or slots used in wood or plastic working having at least one reversible cutter blade attached to the cutter body such that on rotation of the cutter the cutting blade edge describes an angle of less than 90 degrees (approx. 89 degrees) to the cutter axis.
  • the reversible cutter blade is of a parallelogram design with a lesser angle of about 60 degrees.
  • the invention provides a profiling apparatus and a method for profiling an article of wood as defined in the claims.
  • a profiling apparatus 10 is shown in Figures 3 and 4.
  • the profiling apparatus is particularly adapted for profiling a log; however, it may be employed for profiling any elongate article.
  • the term "profiling” means fundamentally to alter the shape of the article for some productive purpose. Referring back to Figures 1B and 1C, typically, this involves altering an elongate form such as the rounded corner "Cround" of a slabbed log into an elongate, reentrant, square corner "C.” This configures the material indicated in Figure 1C as "A" which lies between the contours of neighboring corners C into an orthorhombic configuration, or “squares" the material.
  • a rotor 12 is provided with a desired number of mounting members 14, such as four.
  • the rotor may be disc shaped or it may have some alternative configuration such as that shown.
  • the rotor rotates about an axis "R.”
  • a slabbed log 8 having an elongate axis "L” is fed toward the rotor along a circumferential direction "d" which is represented in Figure 4 and which is perpendicular to the plane of Figure 5.
  • Each mounting member 14 includes two holders 16 and 18. Each holder is adapted to clamp an associated knife 17 and 19 to the mounting member.
  • the knives may be any cutting implements including, for example, saw teeth.
  • the mounting member is, in turn, adapted for mounting to the rotor 12.
  • the identification of discrete parts such as the mounting member and rotor may be somewhat arbitrary since these parts could be combined into an integral unit and function identically for purposes of the present invention. However, it is often preferable to provide these components as individual parts that are adapted to be connected together with machine screws or bolts.
  • the holders 16 and 18 are adapted for clamping their respective knives to the mounting element and for releasing the knife to allow the knife to be removed therefrom. Any of a number of prior art holders may be employed. A particularly advantageous holder is that described in U.S. Patent No. 5,979,522 , which is shaped to fit knives marketed by Key Knife, Inc., under the trademark KEYKNIFE.
  • FIG 5 presents a more detailed view of a preferred mounting member 14 as shown in Figure 3.
  • the knives 17 and 19 have respective cutting edges 20 and 22.
  • the knife 17 is mounted by the holder 16 to the mounting member 14 so that the cutting edge 20 extends parallel to the rotational axis "R" of the rotor.
  • the knife 19 is mounted by the holder 18 to the mounting member so that the cutting edge 22 lies in a plane of rotation of the rotor.
  • the cutting edges 20 and 22 are typically disposed to form a 90 degree angle therebetween, for cutting a square corner C.
  • the knives are preferably adapted so that a back side of the knife 17 abuts a side surface 27 of the knife 19 to form a mitered corner.
  • the side surface 27 of the knife 19 is angled obliquely with respect to the cutting edge 22, and for cutting opposite corners C, left and right handed versions of the angle and, therefore, the knife 19 may be provided.
  • the cutting edges define lines composed of a number of points. Cutting action by each knife creates respective surfaces, typically though not necessarily planes, as a result of the cutting edges progressing through the work as a result of relative movement there between. Similarly, cutting action resulting from a particular point on a cutting edge creates a line, typically though not necessarily straight, as a result of the relative movement.
  • the mounting member is configured so that at least one of the points on one of the cutting edges is proximate at least one of the points on the other of the cutting edges. Preferably, these points are end points "O" of the respective cutting edges and, preferably, these points abut one another, such as shown in Figure 3.
  • a chipping knife is typically clamped to a mounting member by a knife holder, e.g., a bolt extending through the knife holder into either the mounting member or the rotor.
  • the bolt may loosen, allowing the knife some latitude to slip backwardly from the direction of rotation.
  • a gap develops therebetween.
  • any gap so formed may become packed with debris from the log, the packing causing the knives to spread further and further apart from one another during continued use.
  • corresponding mating features are provided in the knives 17 and 19 and the mounting member 14, to substantially lock the knives into a selected position with respect thereto, for maintaining an abutting relationship of the tips of the knives even when the clamping force for holding the knife exerted by the holders 16 and 18 to the mounting member is reduced to zero.
  • Figure 5 shows a preferred structure for this purpose.
  • the knives 17 and 19 each include a keyway 15, and the mounting member 14 includes corresponding keys 32 and 34 that are adapted to fit closely the keyways 15 of the knives.
  • the keyways and keys 32 and 34 are adapted so that interlocking the keyways and the keys prevents movement of the knives in a direction perpendicular to their cutting edges, or in the direction of rotation of the mounting member.
  • the keyways are slots formed in the knives extending parallel to the cutting edges of the knives as shown and described more fully in Carpenter et al., U.S. Patent No. 4,850,408 .
  • the holders are subject to loosening because they are particularly adapted to apply a clamping force to the knives which must be removable in order to replace the knives.
  • the closeness of fit between the keys and keyways is allowed to vary depending on the allowable separation of the tips of the knives.
  • the keys Preferably for maintaining a substantially abutting relationship of the tips of the knives, the keys should fit the keyways to a tolerance of less than about 0.038 cm (0.015").
  • corresponding mating features in the knives and mounting member could be provided to accomplish the result of substantially locking the knives together, as will be immediately appreciated by the person of ordinary skill.
  • other shapes of keys and keyways may be provided, such as "V" shapes, ridges or ribs in either member.
  • a pin and aperture combination could be provided.
  • a non-keyed mating feature a nonremovable or otherwise rigidly attached "backstop" to the knife could be employed. The backstop would be used in conjunction with the corresponding mating feature defined by the back surface of the knife as defined by the direction of rotation of the knife.
  • Corresponding mating features may be keyed or non-keyed according to the principles of the invention.
  • the mounting member 14 is formed of a single piece of metal, to enhance the security with which the relationship of the knives is maintained. However, this is not essential to the advantage provided by the present invention.
  • the profiling apparatus 10 is shown in a typical configuration.
  • the log 8 is shown in elevation as traveling in a direction “d” that is substantially along the longitudinal axis of the log.
  • the grain "g" of the log is defined approximately by a series of concentric cylinders having their axes in the direction “d.”
  • the rotor 12 is shown provided with three mounting members 14, and the axis of rotation “R” of the rotor is perpendicular to the direction "d". In cutting the log along its travel direction "d,” the knives enter the log at point "D", reach a maximum depth of penetration at point "E” and exit the log at point "F".
  • the knife 17 extends into the plane of the paper and, therefore, its cutting edge 20 is always perpendicular to the grain.
  • the angle the knife edge 22 makes with respect to the grain changes along its path from "D” to "E” to “F.”
  • Figures 7 and 8 the knives 17 and 19 are shown in a configuration for cutting square corners "C", wherein the angle ⁇ between the edges 20 and 22 is 90 degrees.
  • the knives are shown relative to the log travel direction "d" as they would appear at point "D”
  • the knives are shown relative to "d” as they would appear at point "E” in Figure 6.
  • both of the cutting edges 20 and 22 are perpendicular to the travel direction “d”, and therefore perpendicular to the grain.
  • the cutting edge 22 is parallel to the grain. This is undesirable.
  • the present invention provides a selected angle ⁇ between the cutting edge 22 and the line "s" defined as being perpendicular to the travel direction "d” and the axis of rotation at point "E.”
  • the angle ⁇ is preferably determined by constructing a radial line extending from the tips of the knives 17 and 19 to the center of the rotor "R”, the same result being obtained by projecting, in a plane perpendicular to the axis of rotation, the line extending from the tips of the knives to any point on the axis of rotation.
  • An angular variation "v" of the angle ⁇ about the tips of the knives is preferably within about +/- 15 degrees. As can be appreciated by inspecting Figure 6 and considering the goal of minimizing parallelism with the grain "g", it is generally desirable that the angle ⁇ be greater where the depth of penetration "d c " into the log ( Figure 6), as compared to the radius "r" of the arc traveled by the tips of the knives, is greater.
  • the consideration of the angle ⁇ is substantially independent of the choice of the angle ⁇ .
  • the projections of the cutting edges 20 and 22 in the direction of rotation of the mounting member 14 that is responsible for the shape of the corner "C" ( Figure 1) remain 90 degrees apart regardless of the choice of the angle ⁇ .

Claims (5)

  1. Profilierungsgerät (10), das dafür vorgesehen ist, eine Mehrzahl von Schneidmessern (17, 19), die jeweils Schneidkanten (20, 22) aufweisen, um eine Drehachse (R) zu drehen, wobei die Einrichtung ein Befestigungsteil (14) aufweist, das eingerichtet ist, zwei der Messer (17, 19) derart zu befestigen, dass die Schneidkante (22) eines (19) der beiden Messer im Wesentlichen in einer Ebene rechtwinklig zur Drehachse (R) verläuft und die Schneidkante (20) des anderen (17) der beiden Messer parallel zur Drehachse (3) verläuft, dadurch gekennzeichnet, dass das Befestigungsteil (14) ferner eingerichtet ist, die zwei Messer (18, 19) derart zu befestigen, dass eine Spitze des einen Messers und eine Spitze des anderen Messers im Wesentlichen aneinander anstoßen.
  2. Profilierungsgerät nach Anspruch 1, bei dem das Befestigungsteil eingerichtet ist, die beiden Messer so zu befestigen, dass die Schneidkante (22) des einen (19) der beiden Messer in einem Winkelbereich von ± 15° von einer radial äußersten ersten Spitze des einen Messers von einer Linie, die sich von der ersten Spitze zur Drehachse erstreckt, verläuft.
  3. Profilierungsgerät nach Anspruch 2, bei dem das Befestigungsteil so eingerichtet ist, dass es das eine Messer so befestigt, dass die Schneidkante im Wesentlichen auf der Linie liegt.
  4. Profilierungsgerät nach einem der vorhergehenden Ansprüche, wobei die Schneidkante (22) des einen der beiden Messer einen Winkel in Bezug auf eine daran unmittelbar anliegende Seite bildet, der sich wesentlich von 90° unterscheidet.
  5. Verfahren zur Profilierung eines Holzartikels, welches das Vorsehen eines ersten Messers (19) mit einer Schneidkante (22) und eines zweiten Messers (17) mit einer Schneidkante (20) umfasst, Drehen des ersten Messers (19) um eine Drehachse (R), Ausrichtung des ersten Messers (19) derart, dass die Schneidkante (22) im Wesentlichen in einer Ebene rechtwinklig zur Drehachse (R) verläuft, Anordnen des zweiten Messers (17) derart, dass dessen Schneidkante (20) im Wesentlichen parallel zur Drehachse (R) verläuft, und Zuführen des Holzartikels gegen das erste Messer (19) in einer Zufuhrrichtung, die rechtwinklig zur Drehachse (R) verläuft, dadurch gekennzeichnet, dass das zweite Messer (17) in Bezug auf das erste Messer (19) derart angeordnet ist, dass ihre entsprechenden Spitzen im Wesentlichen gegeneinander stoßen und derart, dass die Schneidkante (22) des ersten Messers (19) am Punkt des Eintritts des ersten Messers (19) in den Holzartikel einen im Wesentlichen 0° betragenden Winkel in Bezug auf die Richtung der Faser des Holzartikels aufweist.
EP00939747A 1999-06-08 2000-06-08 Verfahren und vorrichtung zum profilieren von baumstämen Expired - Lifetime EP1192027B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US09/327,810 US6058992A (en) 1999-06-08 1999-06-08 Method and apparatus for profiling a log
US327810 1999-06-08
US09/480,123 US6167929B1 (en) 1999-06-08 2000-01-10 Method and apparatus for profiling a log
US480123 2000-01-10
PCT/US2000/015937 WO2000074910A2 (en) 1999-06-08 2000-06-08 Method and apparatus for profiling a log

Publications (3)

Publication Number Publication Date
EP1192027A2 EP1192027A2 (de) 2002-04-03
EP1192027A4 EP1192027A4 (de) 2003-07-23
EP1192027B1 true EP1192027B1 (de) 2007-08-29

Family

ID=26986072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00939747A Expired - Lifetime EP1192027B1 (de) 1999-06-08 2000-06-08 Verfahren und vorrichtung zum profilieren von baumstämen

Country Status (9)

Country Link
EP (1) EP1192027B1 (de)
AT (1) ATE371527T1 (de)
AU (1) AU758287B2 (de)
BR (1) BR0011413A (de)
CA (1) CA2369769C (de)
DE (1) DE60036213T2 (de)
DK (1) DK1192027T3 (de)
ES (1) ES2291213T3 (de)
WO (1) WO2000074910A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017217907A1 (en) * 2016-06-15 2017-12-21 Kvarnstrands Verktyg Ab Wood cutting tool and an arrangement for using said tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004051933A1 (de) * 2004-10-25 2006-05-04 Gebrüder Linck Maschinenfabrik "Gatterlinck" GmbH & Co KG Vorrichtung und Verfahren zum Profilieren von Baumstämmen
KR102312694B1 (ko) * 2021-03-21 2021-10-14 농업회사법인 나무와 주식회사 구부러진 목재의 원형보존이 가능한 곡재용 자동가공장치 및 이를 이용한 곡재가공시스템

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
CH419573A (de) * 1964-10-26 1966-08-31 Oertli & Co Als Scheibenfräser oder Messerkopf verwendbares Werkzeug für Holzbearbeitungsmaschinen
DE2504012A1 (de) * 1964-10-30 1975-10-16 Oertli Werkzeuge Ag Fraeser, insbesondere falz- oder nutenfraeser mit wendeschneidmesser
GB1383209A (en) * 1971-08-14 1975-02-05 Hawker Siddeley Canada Ltd Machine for slabbing logs
US4269244A (en) * 1978-07-13 1981-05-26 Schurman Machine Works, Inc. Rotary chipping head
SE467915B (sv) * 1991-02-05 1992-10-05 Mockfjaerd Haardmetall Planreduceringsanordning
US5617908A (en) * 1995-06-07 1997-04-08 Key Knife, Inc. Chipping cutter head including end cutting knives
US5806301A (en) * 1995-12-11 1998-09-15 United Technologies Corporation Ramjet/scramjet inlet isolator unstart prevention
US5816301A (en) * 1997-07-30 1998-10-06 Key Knife, Inc. Knife supporting structure
US6058992A (en) * 1999-06-08 2000-05-09 Key Knife, Inc. Method and apparatus for profiling a log

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017217907A1 (en) * 2016-06-15 2017-12-21 Kvarnstrands Verktyg Ab Wood cutting tool and an arrangement for using said tool

Also Published As

Publication number Publication date
DE60036213D1 (de) 2007-10-11
ATE371527T1 (de) 2007-09-15
DE60036213T2 (de) 2008-05-21
ES2291213T3 (es) 2008-03-01
WO2000074910A3 (en) 2001-06-28
AU5478600A (en) 2000-12-28
EP1192027A2 (de) 2002-04-03
CA2369769C (en) 2005-05-03
BR0011413A (pt) 2002-05-21
WO2000074910A2 (en) 2000-12-14
DK1192027T3 (da) 2008-01-21
AU758287B2 (en) 2003-03-20
CA2369769A1 (en) 2000-12-14
EP1192027A4 (de) 2003-07-23

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