WO2003016006A1 - Planing cutter - Google Patents
Planing cutter Download PDFInfo
- Publication number
- WO2003016006A1 WO2003016006A1 PCT/SE2002/001497 SE0201497W WO03016006A1 WO 2003016006 A1 WO2003016006 A1 WO 2003016006A1 SE 0201497 W SE0201497 W SE 0201497W WO 03016006 A1 WO03016006 A1 WO 03016006A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wedge
- cutter
- locking body
- press
- recess
- Prior art date
Links
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
- B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
- B27G13/04—Securing the cutters by mechanical clamping means
Definitions
- the present invention relates to a cutter for the planing of wood and which comprises a primarily cylindrical cutter body having a plurality of recesses arranged in the envelope surface of the cutter body, each recess having a recess bottom end and a portion of a radially outwardly abating width in the peripheral direction, wherein a cutting edge element and a locking body are arranged in each recess, which locking body has a radially outwardly abating width in the peripheral direction.
- a plurality of cutter units are arranged for simultaneous planing of the top, bottom and side surfaces of a plank.
- a cutter On a cutter, it is desirable to have relatively many recesses having cutting edges.
- Several cutting edges entail an increased milling capacity, an improved finish of the planed surfaces and a lower noise level.
- a cutter of 160 mm in diameter accommodates six cutting edges.
- the clamping and locking of each cutting edge constitute an important aspect. On one hand this has to be safe of course, and on the other hand it should be simple and preferably require a small circumferential space.
- the peripheral space of the clamping device is one of the factors that delimit the number of cutting edges that can be arranged on a cutter.
- the locking body that clamps the respective cutting edge is normally attached to screws directed in the circumferential direction, which results in a relatively large circumferential extension of the clamping device, especially if the same is arranged adjacent to the chip breaker on the front of the cutting edge.
- a cutter is previously known, where the clamping of each cutting edge is attained by means of an essentially radially directed wedge clamped by means of a likewise radially directed screw.
- the wedge co-operates with the edge holder, and both said elements are arranged in a recess that widens outwards.
- the wedge tapers outwards and the edge holder widens outwards, and both of them co-operate along an oblique plane surface that locks the edge holder by means of a force directed outwards from the wedge.
- the second surface of the edge holder is knurled in order to co-operate with corresponding knurls in one of the walls of the recess.
- a radially directed tightening wedge having a radially outwardly abating cross-section is disclosed, wherein the wedge is pressed outwards by means of tightening screws. Tightening of the same is carried out from the outside through holes in the wedge. Said holes impede an optimum chip release, which is of importance at high speeds, such as above 6000 r/min.
- the purpose of the present invention is to provide a planing cutter having, even at high speeds, efficient, space saving, safe and simple attachment of the cutting edge elements and which does not have negative impact of the chip release.
- each of the locking bodies being provided with at least one radially inwardly facing press-contact surface and at least one essentially axially directed wedge being pressed-in between the press-contact surface and a support surface in the bottom end of the recess.
- the press-contact surface in the axial direction forms an angle to the support surface. Thanks to this angulation, only one wedge is required in order to attain the wedging action. Two co-operating wedges would have been needed should said surfaces have been parallel.
- the press-contact surface forms an angle to the axial direction of the planing cutter. This is a simpler and more expedient alternative compared to the support surface having a corresponding angular adjustment.
- the press-contact surface comprises a first and a second section, wherein each section extends from an axial end each of the locking body and forms from respective directions an acute angle to the axial direction of the planing cutter and that a wedge is pressed in between each section and the support surface.
- a locking device is arranged at each wedge for fixing of the axial position of the wedge.
- an actuator is arranged at each wedge in order to displace the wedge in the axial direction, which actuator also constitutes locking device.
- the pressing in of the wedge in position is simplified, and the press-contact force required for the wedging action can be adapted to a suitable value. Furthermore, having the actuator also serving as a locking device contributes further to the achievement of a simple construction.
- the actuator includes an axially directed screw arranged in an axially directed screw hole in the cutter body, a carrier element axially fixed in relation to the screw, and a slot recessed in the wedge, into which slot the carrier element extends.
- each cutting edge element has a side edge having a set of grooves, wherein at least one groove in each set is in engagement with a pin that protrudes from a side wall of the recess, wherein the number of grooves in each set being in engagement with a pin is lesser than the total number of grooves in the set.
- Fig. 1 is an end view of a quadrant of a planing cutter according to the invention.
- Fig. 2 is a cut along the line ll-ll in fig. 1.
- Fig. 3 is a cut as in fig. 2 but only through the locking body.
- Fig. 4 is an end view of the locking body in fig. 3.
- Figs. 5-12 illustrate, in cross-section as in fig. 2 but on a reduced scale, different steps in assembling and disassembling of the locking body.
- Fig. 1 illustrates a planing cutter according to the invention in an end view. Only a quadrant of the planing cutter is shown.
- the planing cutter consists of a cutter body 1 and a number of cutting edge elements 2, each of which having an appurtenant locking device in the form of a locking body 3.
- Each cutting edge ele- ment 2 and appurtenant locking body 3 is arranged in a recess 4 in the envelope surface of the cutter body.
- the number of recesses is 24 and the diameter of the planing cutter is 260 mm.
- Each recess 4 and the cutting edge element 2 and locking body arranged therein extends axially across essentially the entire width of the cutter body 1.
- Each recess extends radially into the cutter body 1 some distance and has a bottom end 5 at the radially innermost end thereof.
- the locking body 3 in each recess has a radially inwardly turned notch 6.
- two wedges are fixed, only one 7 of which is shown in fig. 1.
- Adjacent to each wedge 7, a combined actuator and locking device 9 is arranged. The same consists of a screw 20 having a hexagon socket 10 and a flange 22.
- the flange 22 of the screw extends into a slot at the underside of the wedge.
- the slot is situated in a radial plane and is not visible in fig. 1.
- the wedge profile of the locking body 3 in co-operation with the likewise, in profile wedge-shaped recess 4 will press the cutting edge element 2 against one of the side walls of the recess, efficiently clamping the same.
- fig. 2 which is a cut along the line 11-11 in fig. 1 , it is closer illustrated how the wedges 7, 8 co-operate with the locking body 3 and how they are actuated and locked.
- the locking body 3 By one of the sides thereof, the locking body 3 thus abuts against the cutting edge element 2, essentially obscured in the figure.
- the locking body 3 has, i.e. through the notch 6 thereof, a trapezoidal shape.
- the oblique surfaces at the underside of the locking body 3 constitute press-contact surfaces 13, 14, against which a wedge 7, 8 each is pressing.
- each wedge 7, 8 has support from a support surface 15 that in the shown example constitutes a part of the bottom end of the recess 6.
- a slot 16, 17 is recessed. Closely inside the wedges, an axially directed threaded bore 18, 19 extends from each side.
- a screw 20, 21 is screwed in.
- Each screw is provided with a flange 22, 23 that extends into the slot 16, 17 in the respective adjacent wedge 7, 8.
- the wedges 7, 8 push with great force at the underside of the locking body 3 so that the same is pressed upwards and brings about the clamping of the cut- ting edge element 2, described in connection with fig. 1.
- each support surface 13, 14 forms an angle of 6° to the axially extending support surface 15 at the bottom end of the recess.
- the locking body 3 is illustrated alone in a longitudinal cut through the same, and in fig. 4, it is shown in an end view.
- the notch 6 recessed in the underside of the locking body and one 14 of the oblique press-contact surfaces 13, 14 are more apparent.
- the parts of the locking body 3 that extend downwards of each side of the notch 6 end in a plane that is axially directed.
- said parts 24, 25 are provided with recesses 26 in order to accommodate the flange 22, 23 of the respective screw situated inside.
- the locking body is assembled, clamped, released and disassembled.
- the locking body 3 is pushed axially from the end wall into a recess in the envelope surface of the cutter body until it reaches the mid position thereof.
- each wedge 7, 8 is threaded in from respective end wall to abutment against the press-contact surfaces 13, 14 of the locking body, so that the locking body is lifted outwards. At the same time each screw is brought in towards the corresponding bore.
- fig. 7 In fig. 7 is shown how each screw 20, 21 is screwed in into respective bore 18, 19, wherein the flange 22, 23 of the respective screw by the engagement thereof in the notch 16, 17 of the adjacent wedge 7, 8 presses the same along.
- Fig. 8 displays the whole in an assembled state, wherein the axial outer ends of the wedges 7, 8 are aligned with the end walls of the cutter body.
- the position in fig. 8 corresponds to what is illustrated in fig. 2.
- Releasing of the locking body, for instance for resharpening of the cutting edge element, takes place as is illustrated in fig. 9 by the screws being unscrewed from the bores thereof, thereby pulling along the adjacent wedge by the flange- notch grip.
- the cutting edge element 2 has, at each axial end, a side edge 11 having a set of grooves 12.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Milling Processes (AREA)
- Milling, Drilling, And Turning Of Wood (AREA)
- Knives (AREA)
- Magnetic Heads (AREA)
- Weting (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60209360T DE60209360T2 (en) | 2001-08-20 | 2002-08-20 | PLANER KNIFE |
EP02760964A EP1438164B1 (en) | 2001-08-20 | 2002-08-20 | Planing cutter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0102766A SE519794C2 (en) | 2001-08-20 | 2001-08-20 | cutterblock |
SE0102766-3 | 2001-08-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003016006A1 true WO2003016006A1 (en) | 2003-02-27 |
Family
ID=20285067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2002/001497 WO2003016006A1 (en) | 2001-08-20 | 2002-08-20 | Planing cutter |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1438164B1 (en) |
AT (1) | ATE318198T1 (en) |
DE (1) | DE60209360T2 (en) |
SE (1) | SE519794C2 (en) |
WO (1) | WO2003016006A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1111368B (en) * | 1958-03-21 | 1961-07-20 | Rohde & Doerrenberg | Knife attachment by means of wedge effect in cutting tools with exchangeable knives |
DE2142972A1 (en) * | 1971-08-27 | 1973-03-08 | Werner Dipl Ing Roth | ROTATING CUTTING TOOL |
FR2564028A1 (en) * | 1984-05-10 | 1985-11-15 | Fontaine Bernard | Device for fastening interchangeable blades on wood machine tool- holders |
-
2001
- 2001-08-20 SE SE0102766A patent/SE519794C2/en not_active IP Right Cessation
-
2002
- 2002-08-20 DE DE60209360T patent/DE60209360T2/en not_active Expired - Lifetime
- 2002-08-20 WO PCT/SE2002/001497 patent/WO2003016006A1/en not_active Application Discontinuation
- 2002-08-20 EP EP02760964A patent/EP1438164B1/en not_active Expired - Lifetime
- 2002-08-20 AT AT02760964T patent/ATE318198T1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1111368B (en) * | 1958-03-21 | 1961-07-20 | Rohde & Doerrenberg | Knife attachment by means of wedge effect in cutting tools with exchangeable knives |
DE2142972A1 (en) * | 1971-08-27 | 1973-03-08 | Werner Dipl Ing Roth | ROTATING CUTTING TOOL |
FR2564028A1 (en) * | 1984-05-10 | 1985-11-15 | Fontaine Bernard | Device for fastening interchangeable blades on wood machine tool- holders |
Also Published As
Publication number | Publication date |
---|---|
EP1438164B1 (en) | 2006-02-22 |
SE519794C2 (en) | 2003-04-08 |
DE60209360T2 (en) | 2006-10-19 |
DE60209360D1 (en) | 2006-04-27 |
EP1438164A1 (en) | 2004-07-21 |
SE0102766D0 (en) | 2001-08-20 |
ATE318198T1 (en) | 2006-03-15 |
SE0102766L (en) | 2003-02-21 |
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