DE4106618A1

DE4106618A1 - Method of clamping circular saw blade without play - involves providing key slot in bore, so that blade can be forced against one side of mandrel

Info

Publication number: DE4106618A1
Application number: DE19914106618
Authority: DE
Inventors: Heinrich Mummenhoff; Roettger Janson-Herfeld
Original assignee: JANSEN HERFELD ROETTGER
Current assignee: JANSEN HERFELD ROETTGER
Priority date: 1991-03-01
Filing date: 1991-03-01
Publication date: 1992-09-03

Abstract

The circular saw blade (1.1) and associated spacing rings have a spiral form key slot (1.1.2) into which is inserted a key member (6) taking up clearance and forcing the saw blade against one side of the machine mandrel (2). The neighbouring spaced saw blade (1.2) is positioned with the key slot (1.2.2) at 180 deg., thus equalising unbalanced forces. ADVANTAGE - Reduces vibration.

Description

Die bekannten Kreissägeblätter bzw. Distanzringe zwischen den Sägeblättern haben den Nachteil, daß immer zwischen deren Mittenbohrung und Maschinen welle eine fertigungsbedingte Toleranz gegeben ist, die dazu führt, daß die Sägeblätter bzw. Distanz ringe immer außermittig gedreht werden und somit durch die Zentrifugalkräfte Schwingungen der Sägeblätter und der Maschinenwelle entstehen.The well-known circular saw blades or spacer rings between the saw blades have the disadvantage that always between their center hole and machines shaft there is a manufacturing tolerance, which leads to the saw blades or distance rings are always turned off-center and thus through the centrifugal forces vibrations of the Saw blades and the machine shaft are created.

Der Erfindung liegt die Aufgabe zugrunde, diese Schwingungen zu reduzieren und somit einen ruhigeren und besseren Lauf der Sägeblätter zu ermöglichen.The invention is based on the object Reduce vibrations and thus a saw blades run smoother and better enable.

Das erfindungsgemäße Sägeblatt bzw. der Distanzring weisen in der Bohrung mindestens eine Anpreßvor richtung auf, die durch ihre formschlüssige radiale Verschiebbarkeit das Sägeblatt spielfrei auf der Maschinenwelle positionieren. Zum Ausgleich der verbleibenden Restunwucht kann bei Maschinen mit mehreren Sägeblättern die Anordnung der Sägeblätter bzw. Distanzringe so vorgenommen werden, daß sich die Anpreßvorrichtungen bei benachbarten Säge blättern bzw. Distanzringen immer um 180° versetzt gegenüber liegen, so daß immer die Hälfte um 180° gedreht gegenüber der anderen Hälfte angeordnet ist.The saw blade or the spacer ring according to the invention have at least one contact in the hole direction due to its positive radial The saw blade can be moved without play on the Position the machine shaft. To compensate for the Remaining unbalance can occur with machines several saw blades the arrangement of the saw blades or spacer rings are made so that the pressing devices in neighboring saw scroll or spacer rings always offset by 180 ° opposite, so that always half by Arranged at 180 ° to the other half is.

Fig. 1 zeigt zwei erfindungsgemäße Sägeblätter (1.1 und 1.2), die die spiralförmigen Keilnuten (1.1.2 und 1.2.2) jeweils aufweisen, wobei letztere um 180° gegenüberliegend angeordnet sind. In den spiralförmigen Keilnuten (1.1.2 und 1.2.2) sind die entsprechend gewölbt geformten Anpreß keile (6) angeordnet, die durch Verschieben in Umfangsrichtung eine radiale Kraft auf die Säge blätter (1.1 bzw. 1.2) dergestalt ausüben, daß diese gegen die Welle (2) gedrückt werden und somit ein radiales Spiel verhindern. Fig. 1 shows two saw blades ( 1.1 and 1.2 ) according to the invention, each having the spiral splines ( 1.1.2 and 1.2.2 ), the latter being arranged opposite each other by 180 °. In the spiral splines ( 1.1.2 and 1.2.2 ), the correspondingly curved pressure wedges ( 6 ) are arranged, which exert a radial force on the saw blades ( 1.1 or 1.2 ) by shifting in the circumferential direction so that these against the Shaft ( 2 ) are pressed and thus prevent radial play.

Fig. 2 zeigt zwei weitere Ausführungsformen, bei denen einmal das Anpreßplättchen (3) durch eine ovale Exzenterscheibe (4) mittels Drehung dieser Scheibe in einem ovalen Loch gegen die Welle gedrückt ist, und eine weitere Ausführungsform zeigt den Anpreßfinger (5), der über einen gleichen ovalen Exzenter radial verbiegbar ist. Die ovale Exzenterscheibe (4) weist einen Innensechskant auf, um dieselbe mit einfachen Mitteln drehen zu können. Fig. 2 shows two further embodiments, in which the pressure plate ( 3 ) is pressed against the shaft by an oval eccentric disc ( 4 ) by rotating this disc in an oval hole, and a further embodiment shows the pressure finger ( 5 ), which over the same oval eccentric is radially bendable. The oval eccentric disc ( 4 ) has a hexagon socket in order to be able to rotate it with simple means.

Fig. 3 zeigt eine Ausführungsform, bei der die radiale Anpressung mittels eines Anpreßstegs (7) erfolgt, der in einem geringen Abstand zum Bohrungs rand angeordnet ist und ebenfalls durch eine ovale Exzenterscheibe, die sich in einem ovalen Loch befindet, radial verbiegbar ist. Fig. 3 shows an embodiment in which the radial pressure by means of a pressure web ( 7 ), which is arranged at a short distance from the bore edge and is also radially bendable by an oval eccentric disc, which is located in an oval hole.

Fig. 4 zeigt eine Ausführungsform, bei der die radiale Anpressung des Distanzrings (8) bzw. eines sehr dicken Sägeblattes durch eine Schraube (9) erfolgt, die schräg zur Drehachse dergestalt angeordnet ist, daß ihre Spitze gegen die Welle (2) zur Druckwirkung drehbar ist. Fig. 4 shows an embodiment in which the radial pressure of the spacer ring ( 8 ) or a very thick saw blade is carried out by a screw ( 9 ) which is arranged obliquely to the axis of rotation such that its tip against the shaft ( 2 ) for the pressure effect is rotatable.

Es sind noch weitere Ausführungsformen möglich, insbesondere Formen, bei denen der Exzenter über einen dünnen Steg mit dem Sägeblatt (1) verbunden ist und somit mittels elastischer Verformung dieses Steges eine Einheit mit dem Sägeblatt bildet.Further embodiments are possible, in particular shapes in which the eccentric is connected to the saw blade ( 1 ) via a thin web and thus forms a unit with the saw blade by means of elastic deformation of this web.

BezugszeichenlisteReference symbol list

1.1 Sägeblatt
1.2 Sägeblatt
1.1.2 spiralförmige Keilnute
1.2.2 spiralförmige Keilnute
2 Maschinenwelle
3 Anpreßplättchen
4 ovale Exzenterscheibe
5 Anpreßfinger
6 Anpreßkeil
7 Anpreßsteg
8 Distanzring
9 Schraube 1.1 saw blade
1.2 saw blade
1.1.2 spiral keyway
1.2.2 spiral keyway
2 machine shaft
3 pressure plates
4 oval eccentric discs
5 pressure fingers
6 pressure wedge
7 contact bridge
8 spacer ring
9 screw

Claims

1. Circular saw blade or spacer ring for circular saw machines, characterized in that the saw blade ( 1 ) or the spacer ring ( 8 ) at the edge of the center bore has at least one form-fitting device, the radial difference pressing against the machine shaft ( 2 ), the diameter difference between the Center bore and the machine shaft ( 2 ) so that the saw blade ( 1 ) or the spacer ring ( 8 ) can be pressed radially against the machine shaft ( 2 ).

2. Circular saw blade or spacer ring for circular saw machines according to claim 1, characterized in that in each saw blade two radial pressure devices are provided which are about 120 ° are offset in the circumferential direction.

3. Circular saw blade or spacer ring for circular saw machines according to one or more of claims 1 to 2, characterized in that the radial contact force against the shaft ( 2 ) is caused in that curved contact wedges ( 6 ) in spiral-shaped keyways ( 1.1.2 or 1.2.2 ) are arranged, which lie on the edge of the center hole of the saw blade ( 1 ) or the spacer ring ( 8 ).

4. Circular saw blade or spacer ring for circular saw machines according to one or more of claims 1 to 3, characterized in that the radial contact pressure against the shaft ( 2 ) is caused by the fact that an oval eccentric disc ( 4 ) in an oval hole in the saw blade ( 1 ) or spacer ring ( 8 ) is arranged in such a way that it is in operative connection with a pressure plate ( 3 ) which can be moved in the radial direction and which has two parallel side faces for radial guidance and is arranged in a spline-shaped recess on the center bore edge.

5. circular saw blade or spacer ring for circular saw machines according to one or more of claims 1 to 4, characterized in that the radial contact force against the shaft ( 2 ) is caused in that an oval eccentric ( 4 ) in an oval hole in the saw blade ( 1 ) or spacer ring ( 8 ) is arranged in such a way that it is in operative connection with a pressure finger ( 5 ) which can be bent in the radial direction and which has a trough at one end for receiving the eccentric disc ( 4 ) and through one approximately parallel to the edge of the bore running finite slot, which ends at one end in the bore, is a radially resilient part of the saw blade ( 1 ) or the spacer ring ( 8 ) or that the eccentric disc ( 4 ) is in active connection with a radially bendable pressure bridge ( 7 ) , which has in its center a trough for receiving the eccentric disc ( 4 ) and from the center to both sides approximately parallel to the edge of the bore, endless I have slots.

6. Circular saw blade or spacer ring for circular saw machines according to one or more of claims 1 to 5, characterized in that the oval eccentric disc ( 4 ) has an approximately central hole with a slotted or polygonal shape, in particular hexagonal shape.

7. Circular saw blade or spacer ring for circular saw machines according to one or more of claims 1 to 6, characterized in that in the installed state, the pressing devices for adjacent saw blades ( 1 ) or spacer rings ( 8 ) are always offset by 180 ° relative to one another, ie always half is rotated by 180 ° relative to the other half.

8. circular saw blade or spacer ring for circular saw machines according to one or more of claims 1 to 7, characterized in that the radial pressure on the machine shaft ( 2 ) by an obliquely arranged to the axis of rotation screw ( 9 ).

9. circular saw blade or spacer ring for circular saw machines according to one or more of claims 1 to 8, characterized in that the saw blade ( 1 ) or the spacer ring ( 8 ) in the radially pressed against the shaft ( 2 ) is balanced state.