EP0968786A2 - Schälblatt zur Bearbeitung von faserigem Material - Google Patents
Schälblatt zur Bearbeitung von faserigem Material Download PDFInfo
- Publication number
- EP0968786A2 EP0968786A2 EP98114419A EP98114419A EP0968786A2 EP 0968786 A2 EP0968786 A2 EP 0968786A2 EP 98114419 A EP98114419 A EP 98114419A EP 98114419 A EP98114419 A EP 98114419A EP 0968786 A2 EP0968786 A2 EP 0968786A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotating body
- peeling blade
- cutting
- cutting edges
- blade according
- 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- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
- B27C1/005—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor with tools having a rotational vector which is perpendicular to the working surface
-
- 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
Definitions
- the invention relates to a peeling blade for processing fibrous material, in particular wood, consisting of a rotating body made of a flat material blank, which with centrally arranged means for attachment provided a drive shaft and with at least two of its plane opposite laterally projecting cutting edges and upstream of these Chip passages is equipped.
- Peeling blades of the aforementioned type are known per se and are characterized in Characteristically characterized in that the cutting through on the Knives are formed on the rotary body forming the peeling blade.
- the knife are usually attached to the rotating body by means of screws caused a considerable manufacturing effort for the peeling blade.
- the disadvantage of a considerable manufacturing effort is traditionally liable with peeling blades equipped with screwed-on knives the further disadvantage of a very large width, resulting in that they are only designed for use Such peeling blades designed machines can be used.
- the invention is therefore based on the object of a peeling blade of the type mentioned Art to improve in that it is comparatively low Effort can be produced and on common machines, especially conventional ones Circular saws can be used.
- This object is achieved according to the invention essentially by the fact that the cutting edges, which are arranged on one side and protrude laterally, protrude from the one side plane of the rotating body forming the carrier by an amount which is less than the amount of the material thickness of the rotating body.
- Such a formation of a peeling blade enables a width of the peeling blade limited to the dimension of the material thickness of the rotary body and the flared dimension of the cutting edges, with the result that the peeling blade can also be used on conventional circular saws.
- the sheet metal material used for the formation of the rotating body expediently has the quality features of a stainless steel.
- the rotating body is formed by a sheet metal material blank having a circular plan shape and the cutting edges with the rotating body are constructed uniformly in terms of construction and material.
- the construction of the cutting edges with the rotary body which is uniform in terms of construction and material, mainly results in a simplified manufacture of the peeling blade in a single working process comprising a free cutting and a shaping measure.
- the cutting edges are formed by free cuts of the rotating body which are made transverse to its plane.
- the free cuts forming the cutting edges are made at a flat angle, in particular at an angle of 10 °, against the plane of the rotating body.
- the cutting edges are formed by strips made of a hard metal and are fastened to the plane of the rotary body so that they protrude unilaterally from end faces of chip openings.
- the hard metal strips forming the cutting edges have to force one Chip removal expediently has and is a wedge-shaped cross-sectional shape from their laterally projecting from the plane of the rotating body Cutting edge towards the opposite side of the rotating body sloping attached to this.
- a joining process for example Soldering, used.
- the chip passages cut out in the direction of rotation of the rotary body with respect to the cutting edges which are cut out in advance in the rotary body expediently have a substantially U-shaped outline shape and the free cuts forming the cutting edges are arranged such that there are between the side flanks of the cut-out and exposed cutting edges or the side surfaces of the cutting edges Cutting forming hard metal strips of the peeling blade and the surrounding area of the rotating body gives a free space.
- the chip passages and in particular the free cuts forming the cutting edges are cut out by means of laser cutters in order to ensure an absolutely smooth cutting surface and thus prevent cracking.
- the ends of the legs of the cut-out chip passages encompassing the cutters and having a U-shaped outline shape have a rounded outline shape and are tangential merge into the side surfaces of the free cuts forming the cutting edges.
- the clearances forming the chip openings have the further task to form a space for regrinding the cutting edges, which is why expedient it is provided that the width in the direction of rotation of the rotating body upstream of the cutting edges and through the profile base of the U-shaped At least plan shape of the cutouts formed areas of the chip passages correspond to a seventh of the cutting length.
- Embodiment of a peeling blade according to the invention can supplement the first realization form that the cutting free cuts are ground on their back surface, such that the maximum total width of the peeling blade is further reduced without the Stability of the cutting edges would be reduced.
- further provision can be made be that the free cuts forming the cutting edges on their free end face under are sharpened at an angle, in particular at an angle of 50 °.
- the peeling blade has a significant influence on its functionality and fatigue strength, which is why provided according to a further feature of the invention is that the rotary body formed by a sheet material blank both under the influence of temperature and in a manner known per se under the action of pressure is designed to be inherently rigid or stabilized.
- the peeling blades 1 shown in Figures 1 and 4 each consist of a through a circular blank of a stainless steel Steel sheet material formed rotating body and are with two groups of Cutting 2, 20 or 3, 30 equipped, the one shown in Figure 1 Peel blade the blades 2 and 3 each across the plane of the Undercuts 4 forming the peeling blade 1 are formed.
- the peeling blade shown in FIG. 1 In the peeling blade shown in FIG.
- the cutting edges 20 and 30 are like 5 can be seen in particular from a wedge-shaped cross-sectional shape having hard metal strips 21 formed, the hard metal strips 21 of the plane of the rotating body opposite to one side by a small amount are arranged in such a way that they are used to force a Chip derivation projecting laterally from the plane of the rotating body arranged cutting edge 22 to the opposite side of the Rotating body sloping attached to this. They cut 20 and 30 respectively Forming hard metal strips are in the embodiment shown by soldering on Rotary body attached.
- the cutting edges 2 and 3 or 20 and 30 are in the direction of rotation cutouts 5 are assigned to the peeling blade in advance, which in a first function ensures the smooth removal of the chips serve and have a U-shaped plan shape, such that they with their profile base lie in front of the cutting edges 2, 20 or 3, 30 and with their profile legs 6 and 7 the side faces of the cutting edges 20, 30 and the exposed cutting edges 2 or 3 forming free cuts 4.
- the contours of the chip openings forming cutouts 5 and in particular the cutting edges 2 and 3 forming Free cuts 4 are cut out by means of laser cutters to absolute to ensure smooth and therefore crack-free cutting surfaces.
- the width of the upstream of the cutting edges 2, 20 and 3, 30 and through the Profile base of the U-shaped plan shape of the cutouts 5 areas formed the chip passages correspond to one seventh in the embodiment shown the cutting length.
- the U-shaped floor plan and the Cutting 2 or 3 free cuts 4 encompassing arranged cutouts 5 are further arranged such that they encompass the cuts 4 Profile legs 6 and 7 each have a space between the side flanks 10 of the cut and exposed cutting 2 or 3 and the surrounding Area of the body of revolution.
- the free ends of the profile legs 6 and 8 of the chip openings which have a U-shaped plan shape, have a rounded one Floor plan shape and go tangentially into the side flanks 10 of the Cut 2 or 3 forming free cuts 4 or the mounting base for the Cut 20 and 30 carbide strips forming over.
- the cutting edges 2 and 3 free cuts forming, as can be seen in particular from the illustration in FIG. 3, against the plane of the rotary body forming the peeling blade 1 made an angle of 10 ° and on its free end to form a Cutting sharpness chamfered at an angle of 50 °.
- peeling blade are about the surface of the rotating body towards two groups of two cutting edges each, 20 and 3, 30 arranged in two partially overlapping ring surfaces 11 and 12.
- the two ring surfaces overlap 11 and 12 by one another corresponding to the maximum width of the peeling blade Amount such that, as shown in Figures 1 and 4, the inner margin 13 of the outer ring surface 11 around the outer edge 14 of the inner ring surface 11 overlaps an amount corresponding to the maximum width of the peeling blade 1.
- the cutting edges 2, 20 and 3, 30 of both groups are arranged skewed overall and in particular with respect to a radiant of the peeling blade 1 Rotating body each made at an angle of 25 °.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Sawing (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Nonmetal Cutting Devices (AREA)
Abstract
Description
In einer ersten vorteilhaften Verwirklichungsform eines erfindungsgemäßen Schälblattes ist vorgesehen, daß der Rotationskörper durch einen eine kreisrunde Grundrißform aufweisenden Blechmaterialzuschnitt gebildet ist und die Schneiden mit dem Rotationskörper bau-und materialeinheitlich ausgebildet sind. Aus einer bau-und materialeinheitlichen Ausbildung der Schneiden mit dem Rotationskörper resultiert hauptsächlich eine vereinfachte Herstellung des Schälblattes in einem einzigen eine Freischneide- und eine Ausformungsmaßnahme umfassenden Arbeitsvorgang.
In einer zweiten, gleichermaßen vorteilhaften Verwirklichungsform eines erfindungsgemäßen Schälblattes kann jedoch auch vorgesehen sein, daß die Schneiden durch Leisten aus einem Hartmetall gebildet und zu dessen Ebene gegenüber einseitig vorspringend an Stirnflächen von Spandurchlässe bildenden Ausschnitten im Rotationskörper befestigt sind.
In weiterer vorteilhafter Ausgestaltung ist zur sicheren Vermeidung einer Rißbildung im Bereich der ausgestellten Schneiden bzw. der eingesetzten und Schneiden bildenden Hartmetalleisten ferner vorgesehen, daß die Enden der die Schneiden umgreifenden Schenkel der ausgeschnittenen und eine U-förmige Grundrißform aufweisenden Spandurchlässe eine gerundete Grundrißform aufweisen und tangential in die Seitenflächen der die Schneiden bildenden Freischnitte übergehen.
Claims (12)
- Schälblatt zur Bearbeitung von faserigem Material, insbesondere Holz, bestehend aus einem durch einen in Form eines Flachmaterialzuschnittes ausgebildeten Rotationskörpers gebildeten Trägers, welcher mit zentral angeordneten Mitteln zur Befestigung auf einer Antriebswelle versehen und mit wenigstens zwei seiner Ebene gegenüber seitlich vorspringend angeordneten Schneiden sowie diesen vorgeschalteten Spandurchlässen ausgestattet ist,
dadurch gekennzeichnet,
daß die einseitig dessen Ebene gegenüber seitlich vorspringend angeordneten Schneiden der einen Seitenebene des den Träger bildenden Rotationskörpers gegenüber um einen Betrag vorspringen der kleiner ist als der Betrag der Materialstärke des Rotationskörpers. - Schälblatt nach Anspruch 1, dadurch gekennzeichnet, daß der den Träger bildende Rotationskörper durch einen eine kreisrunde Grundrißform aufweisenden Blechmaterialzuschnitt gebildet ist und die Schneiden mit diesem bau-und materialeinheitlich ausgebildet sind.
- Schälblatt nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Schneiden durch quer zu dessen Ebene ausgestellte und unter einem flachen Winkel gegen die Ebene des Rotationskörpers angestellte Freischnitte des Rotationskörpers gebildet und die die Schneiden bildenden Freischnitte an ihrer Rückenfläche abgeschliffen und an ihrer freien Stirnseite unter einem Winkel von 50° angeschärft sind.
- Schälblatt nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die die Schneiden bildenden Freischnitte unter einem Winkel von 10° gegen die Ebene des Rotationskörpers angestellt sind.
- Schälblatt nach Anspruch 1, dadurch gekennzeichnet, daß die Schneiden durch Leisten aus einem Hartmetall gebildet und zu dessen Ebene gegenüber einseitig vorspringend an Stirnflächen von Spandurchlässe bildenden Ausschnitten im Rotationskörper befestigt sind.
- Schälblatt nach Anspruch 1 und 5, dadurch gekennzeichnet, daß die die Schneiden bildenden Hartmetalleisten eine keilförmige Querschnittsform aufweisen und von ihrer der Ebene des Rotationskörpers gegenüber seitlich vorspringend angeordneten Schneidenkante zur gegenüberliegenden Seite des Rotationskörpers hin abfallend an diesem befestigt sind.
- Schälblatt nach Anspruch 6, dadurch gekennzeichnet, daß die die Schneiden bildenden Hartmetalleisten mittels eines Fügeverfahrens, beispielsweise Löten, am Rotationskörper befestigt sind.
- Schälblatt nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß die im Rotationskörper ausgeschnittenen Spandurchlässe eine im Wesentlichen U-förmige Grundrißform aufweisen und die die Schneiden bildenden Freischnitte bzw. die die Schneiden bildenden Hartmetalleisten umgreifend angeordnet sind, wobei die Breite der in Rotationsrichtung des Rotationskörpers den Schneiden vorgeschalteten und durch den Profilgrund der U-förmigen Grundrißform der Ausschnitte gebildeten Bereiche der Spandurchlässe wenigstens einem Siebtel der Schneidenlänge entspricht.
- Schälblatt nach Anspruch 1 bis 8, dadurch gekennzeichnet, daß die Enden der die Schneiden umgreifenden Schenkel der ausgeschnittenen und eine U-förmige Grundrißform aufweisenden Spandurchlässe eine gerundete Grundrißform aufweisen und tangential in die Seitenflächen der die Schneiden bildenden Freischnitte übergehen.
- Schälblatt nach Anspruch 1 bis 9, dadurch gekennzeichnet, daß über die Fläche des Rotationskörpers hin mehrere Gruppen von in Rotationsrichtung des Schälblattes aufeinanderfolgend angeordneten Schneiden angeordnet sind, wobei die Schneiden jeder Gruppe jeweils innerhalb einer Ringfläche angeordnet sind, und wobei benachbarte Ringflächen einander zumindest geringfügig, wenigstens aber um den Gesamtbetrag der maximalen Breite des Schälblattes, überlappend angeordnet sind.
- Schälblatt nach Anspruch 1 bis 10, dadurch gekennzeichnet, daß über die Fläche des Rotationskörpers hin zwei Gruppen von Schneiden angeordnet sind und sich die beiden Ringflächen um einen Betrag überdecken, wobei jede Gruppe wenigstens zwei Schneiden aufweist und wobei ferner die Schneiden jeder Gruppe gegenüber dem Radianten des Rotationskörpers jeweils unter einem spitzen Winkel von 25° angestellt sind.
- Schälblatt nach Anspruch 1 bis 11, dadurch gekennzeichnet, daß der durch einen Blechmaterialzuschnitt gebildete Rotationskörper unter Temperatureinwirkung und Druckeinwirkung eigensteif gestaltet bzw. stabilisiert ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19829464 | 1998-07-01 | ||
| DE1998129464 DE19829464B4 (de) | 1998-07-01 | 1998-07-01 | Schälblatt zur Bearbeitung von faserigem Material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0968786A2 true EP0968786A2 (de) | 2000-01-05 |
| EP0968786A3 EP0968786A3 (de) | 2004-03-31 |
Family
ID=7872681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98114419A Withdrawn EP0968786A3 (de) | 1998-07-01 | 1998-07-31 | Schälblatt zur Bearbeitung von faserigem Material |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0968786A3 (de) |
| DE (2) | DE19829464B4 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106695954A (zh) * | 2016-12-24 | 2017-05-24 | 信宜市安然中药饮片有限公司 | 一种中药材原料根茎切片机 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH83923A (de) * | 1919-04-30 | 1920-06-16 | Sal Baumann | Werkzeug zum maschinellen Abschälen der Rinde von Rundholz |
| SE323872B (de) * | 1946-03-29 | 1970-05-11 | Brundell & Jonsson Ab | |
| US2682375A (en) * | 1952-03-05 | 1954-06-29 | Charles A Johnson | Rotary chipper knife blade mounting |
| US3732907A (en) * | 1970-06-12 | 1973-05-15 | Pitea Maskin Industri | Device for separating small pieces from a work piece of material |
| US4685181A (en) * | 1983-07-07 | 1987-08-11 | Schwartz Jerry C | Heavy duty rotary disc rasp |
| FI94398C (fi) * | 1993-10-20 | 1995-09-11 | Vantaan Siemen Ja Kone Oy | Vuolulaikka |
-
1998
- 1998-07-01 DE DE1998129464 patent/DE19829464B4/de not_active Expired - Lifetime
- 1998-07-31 DE DE29813671U patent/DE29813671U1/de not_active Expired - Lifetime
- 1998-07-31 EP EP98114419A patent/EP0968786A3/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE19829464B4 (de) | 2012-06-14 |
| EP0968786A3 (de) | 2004-03-31 |
| DE29813671U1 (de) | 1999-11-11 |
| DE19829464A1 (de) | 2000-01-05 |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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| RIC1 | Information provided on ipc code assigned before grant |
Ipc: 7B 27L 11/00 B Ipc: 7B 27C 1/00 A |
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| AKX | Designation fees paid |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
Effective date: 20050201 |