EP3623127A1 - Werkzeugkopf und verfahren zum positionieren einer schneidplatte in der werkzeugaufnahme des werkzeugkopfes - Google Patents

Werkzeugkopf und verfahren zum positionieren einer schneidplatte in der werkzeugaufnahme des werkzeugkopfes Download PDF

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Publication number
EP3623127A1
EP3623127A1 EP19206429.3A EP19206429A EP3623127A1 EP 3623127 A1 EP3623127 A1 EP 3623127A1 EP 19206429 A EP19206429 A EP 19206429A EP 3623127 A1 EP3623127 A1 EP 3623127A1
Authority
EP
European Patent Office
Prior art keywords
cutting plate
tool
groove
tool head
lines
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.)
Pending
Application number
EP19206429.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Manfred Eckert
Bruno Ehrle
Zoran OSTOJIC
Michael Paglione
Erich MEILI KAI
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.)
Oertli Werkzeuge AG
Original Assignee
Oertli Werkzeuge AG
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 Oertli Werkzeuge AG filed Critical Oertli Werkzeuge AG
Publication of EP3623127A1 publication Critical patent/EP3623127A1/de
Pending 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
    • 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
    • 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
    • B27G13/08—Cutter blocks; Other rotary cutting tools in the shape of disc-like members; Wood-milling cutters
    • B27G13/10—Securing the cutters, e.g. by clamping collars
    • 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
    • B27G13/12—Cutter blocks; Other rotary cutting tools for profile cutting

Definitions

  • a knife shaft for cutting woodworking machines is known, in particular for planing machines. It has a one-piece shaft body that has several axially parallel grooves that narrow towards the lateral surface, in each of which sits a profiled disposable knife braced by a centrifugal wedge, which positively engages in a corresponding profiling of the side surface of a retaining strip lying between disposable knife and centrifugal wedge.
  • the retaining bar is immovably connected to the shaft body and elastically deformable. It is arranged at such a distance from the side wall of the groove that, when the centrifugal wedge is released, an intermediate knife can be easily pulled out in the longitudinal direction and a new knife can be inserted practically without play.
  • U.S. Patent Application No. 2005/0265795 shows a tool head with a tool holder, in which a cutting edge can be clamped by means of a fastening wedge.
  • the cutting edge has a chamfer on the cutting edge base and opposite the flat side with the cutting edge, which creates the necessary space when the cutting edge is inserted into the tool holder opening.
  • Knife heads with conventional knife holders without centrifugal wedges usually require several screws when using wide knives to attach the knives to the knife head. This requires more work when changing knives.
  • Another problem with such conventional cutter heads is that the pressure bodies are fastened with screws in a groove of the cutter head against the centrifugal force that arises during rotation. At high speeds, the centrifugal forces can cause the knife to shift slightly, which affects the accuracy of the woodworking and leads to greater tolerances.
  • Another aim is to provide a tool head in which a prior disassembly of tool heads adjacent to the tool head is no longer necessary when changing the tool or insert.
  • Another goal is to propose a tool head that minimizes the work involved in changing tools.
  • Another goal is that when changing tools, the new insert is precisely adjusted in the radial and preferably axial direction.
  • this tool head is further characterized in that a pressure element is provided in the tool holder which presses a cutting insert inserted into the tool holder in the radial direction against a stop.
  • the tool head designed in this way has the great advantage that the tool is automatically positioned radially when it is clamped in that the pressure medium automatically brings it radially outwards and stops it with a projection on the tool. This ensures exact positioning of the inserts in the tool holder without additional effort.
  • An expedient embodiment provides that the pressure element is provided or arranged on the closure element. Seen in the longitudinal direction under the magnets, i.e. closer to the base of the closure element.
  • the pressure element can be designed as a plastic positioning protruding from the surface.
  • the positioning knob can, for example, be inserted into a hole in the closure element.
  • the pressure element is a spring, which is used simultaneously for the lateral and radial positioning of the cutting edge and for pressing the closure element onto the centrifugal wedge jaws.
  • a second positive connection is advantageously provided between the closure element and the centrifugal wedge.
  • This arrangement of the interlocking connections namely between the insert and the tool head on the one hand and the closure element and the centrifugal wedge on the other hand, has the advantage that a relative movement between the closure element and the insert is possible when clamping because there is no interlocking connection between the insert and the closure element.
  • the proposed arrangement of the interlocking connections also allows the cutting insert to be inserted into the groove in the radial direction.
  • the centrifugal wedge advantageously has a bore with an internal thread into which a clamping screw with an external thread can be inserted.
  • the centrifugal wedge can be moved into the clamping position by rotating the clamping screw in a first direction and into the tool changing position by rotating the clamping screw in a second, opposite direction.
  • this tool holder has the advantage that the centrifugal wedge is preloaded outwards in the radial direction when the tool is clamped. This has the advantage that the centrifugal wedge and the cutting plate no longer move when the tool head begins to rotate.
  • a screw hole with an internal thread is advantageously provided in the base of the groove, and the shaft of the clamping screw has two threaded sections with opposite screw threads.
  • This has the advantage that, if the direction of rotation of the screw thread is selected appropriately, the centrifugal wedge moves away from the groove base when the clamping screw is screwed into the screw hole.
  • the clamping screw can be inserted rotatably but immovably in the axial direction into the bore of the centrifugal wedge. In this way, too, the centrifugal wedge can be pressed against the closure element by turning the clamping screw.
  • the at least one magnet is preferably inserted into a recess of the closure element flush with its surface. This has the advantage that the cutting plate can lie flat against the closure element. For reasons of symmetry, at least there are expediently in the closure element two spaced-apart recesses are provided, in which magnets are inserted flush.
  • the one or more cutouts in the lower region of the closure element are advantageously provided at a short distance from the base of the closure element, in particular in the lower third of the closure element. However, other positions are also possible depending on the dimensions of the insert.
  • the centrifugal wedge advantageously has a front wedge surface, which is oriented to the first groove wall of the groove, and a back surface opposite the wedge surface, which is oriented to the second groove wall of the groove and which takes an acute angle to the front wedge surface.
  • the wedge surface preferably has a groove-shaped depression running in the axial direction. The depression has the advantage that the contact pressure is concentrated on the areas of the centrifugal wedge adjacent to the depression.
  • An elevation extending in the axial direction is advantageously provided on the wedge surface.
  • the survey e.g. an elongated bead can ensure a positive fit with the closure element.
  • a first contact surface is expediently provided above the recess and a second contact surface below the recess with a minimum width of at least 1 mm, preferably of at least 2 mm, and particularly preferably of at least 3 mm.
  • the first groove wall of the groove preferably has an angle between 0 and 40 degrees, preferably between 15 and 35 degrees and particularly preferably between 20 and 30 degrees, with a radial extending from the center of the tool head.
  • the bottom of the centrifugal wedge is advantageously designed with a step that preferably extends parallel to the longitudinal axis of the bore, so that there is a first bottom surface adjacent to the front wedge surface and a second bottom surface adjacent to the back surface.
  • the second floor surface closes with the back surface at an angle> 90 degrees, preferably between 90.1 and 95 degrees particularly preferably between 90.5 and 94 degrees.
  • This physical design of the centrifugal wedge has the advantage that a tilting movement of the centrifugal wedge can be caused when the tool holder is released.
  • a centering pin (e.g. press fit) can be embedded in the first groove wall for the lateral centering of the cutting insert and, if applicable, the closure element.
  • a third positive connection is provided between the centrifugal wedge and the closure element for the lateral centering of the closure element. This is a particularly advantageous embodiment which, in conjunction with the second positive connection, enables the radial and axial adjustment of the cutting insert.
  • the cutting plate for the tool head of a woodworking machine has a cutting edge on a first side (knife chest) of the cutting plate and a positioning groove on the second side of the cutting plate opposite the cutting edge.
  • This cutting plate is characterized in that the edge of the cutting plate diagonally opposite the cutting edge has a functional surface in the form of a chamfer or a rounding, the depth of which is preferably at least 15% of the cutting plate thickness.
  • This insert has the advantage that it can be positively fixed directly in the tool body.
  • the chamfer is advantageously ⁇ 0.6 mm.
  • This chamfer which is significantly larger than known cutting inserts, has the advantage that an elastically deformable pressure element can spread when the centrifugal wedge is tensioned due to the increased free space between the groove wall and the cutting insert.
  • the enlarged chamfer therefore has a meaning in connection with the correct radial positioning of the cutting insert.
  • this functional surface is also relevant in terms of safety, since without it the brittle cutting inserts could break during clamping and fly away during operation.
  • only a single positioning channel is provided, the lower edge of which is at a distance of ⁇ 10 mm and preferably ⁇ 8 mm from the cutting surface of the insert.
  • the positioning channel is located within a clamping area.
  • This clamping area is limited on the one hand in depth by the shoulder of the first groove wall and on the other hand in height by the apex of the top surface of the centrifugal wedge and the first pressure surface of the centrifugal wedge.
  • the cutting plate advantageously has at least one U-shaped recess for lateral positioning.
  • the insert can also have no U-shaped exception.
  • the lateral positioning can then take place, for example, by means of two lateral positioning elements, between which the cutting plate is arranged.
  • the centrifugal wedge is advantageously moved into the clamping and changing position with the aid of a clamping screw.
  • the insert is advantageously clamped in the direction of the centrifugal force by means of a clamping screw acting on the centrifugal wedge.
  • the invention also relates to a method for positioning a cutting plate in a tool holder of a tool head, in which a cutting plate inserted into the tool holder is pressed against a stop by means of a pressure element provided and appropriately aligned in the tool holder, by the pressure element acting radially outwards Exerts force on the insert. It is important that the positioning takes place automatically when the tool is clamped.
  • the pressure element can provide radial, lateral or lateral and radial positioning.
  • the cutting plate Before the final clamping position is reached, the cutting plate is preferably pressed outward in the radial direction against a stop. This has the advantage that the insert is positioned precisely in the tool holder and cannot slip during operation.
  • the insert is advantageously positioned or reached before reaching the final position with the aid of an elastic element. positively brought into contact with a stop bar.
  • the insert is advantageously releasably pulled to the closing element in the changing position. This is expediently done with the aid of a magnet, which can be arranged on the closure element or the centrifugal wedge.
  • the centrifugal wedge is loosened with the help of the clamping screw.
  • the centrifugal wedge can be released without a hammer.
  • the locking element is advantageously held positively by the centrifugal wedge in the tool change position.
  • the cutting plate is advantageously clamped to the stop and in the direction of flight.
  • the insert is advantageously pressed against the closure element in the change position by the pressure element.
  • a tool head 11 for the rotating processing of wood and its components. It has a plurality of tool receptacles 13 distributed over the circumference, in each of which a tool in the form of a cutting plate 15 can be received.
  • a groove 19 narrowing in the radial direction is provided in the tool holder 13, which can run parallel to the axis or at an angle to the axis of rotation 17 of the tool head 11.
  • a centrifugal wedge 23 and a closure element 25 are used for clamping the cutting plate 15, which in the example shown by a profile knife 21 ( Fig. 6 .
  • the closure element 25 lies against the cutting plate 15 and is pressed by the centrifugal wedge 23 against the flat side of the cutting plate 15.
  • the latter is thus in the work or Clamping position clamped between a first groove wall 27 of the tool head 11 and the closure element 25.
  • the tool head according to the invention is distinguished by the fact that the cutting insert can be inserted into the tool holder 13 in the radial direction or can be removed from it again.
  • the closure element 25 is held in the tool holder 13 without screws.
  • the centrifugal wedge 23 for all widths in the area of application according to the invention typically between 7 mm and 150 mm, preferably between 15 and 100 mm
  • is tensioned by a single screw 29. is released, ie that no hammer is required to loosen the tool holder, as is usually the case with conventional tool heads.
  • the groove 19 is narrowed in a wedge shape in the radial direction, i.e. the first groove wall 27 and a second groove wall 31 opposite the first groove wall 27 are inclined towards one another.
  • the centrifugal wedge 23 is received in the groove 19.
  • the dimensioning of the centrifugal wedge 23 and the groove 19 is preferably such that the centrifugal wedge - in the absence of the closure element 25 - can be inserted into the groove 19 in the radial direction.
  • the dimensioning of the centrifugal wedge 23 and the groove 19 is such that only a lateral insertion is possible. Both embodiments are equally possible within the scope of the present invention.
  • the centrifugal wedge 23 has a front wedge surface 33, which bears against the closure element 25, and a back surface 35, which bears flat against the second groove wall 31. If no closure element is provided, the front wedge surface 33 bears directly on the cutting plate.
  • the front wedge surface 33 is interrupted by a recess 37 running in the longitudinal direction of the centrifugal wedge 23, so that a first pressure surface 39 is present above the recess 37 and a second pressure surface 41 is provided below the recess.
  • the second pressure surface 41 has an elevation 43 in the form of a bead running in the longitudinal direction, which enables a positive connection with a corresponding, complementarily shaped recess 47 of the closure element 25.
  • the bottom of the centrifugal wedge 23 is stepped, so that there is a first bottom surface 49 adjacent to the front wedge surface 33 and a second bottom surface 51 adjacent to the back surface 35.
  • First and second bottom surfaces 49, 51 are separated by a step 53, which preferably extends essentially parallel to the back surface 35.
  • the second bottom surface 51 forms an angle of 90 degrees or more, preferably between 91 and 93 degrees, with the back surface 35.
  • one or more elongated holes 55 arranged at a distance from one another can be provided in the centrifugal wedge 23. Between the elongated holes 55 there is a screw hole 57 with a longitudinal axis 59, which extends from the top surface 61 to the second bottom surface 51. The longitudinal axis 59 of the Screw hole 57 extends essentially parallel to the back surface 35. The screw hole 57 has an internal thread 63 for receiving a rear threaded section 99 of the screw 29 ( Fig. 7 ).
  • the bottom of the groove is also stepped. It comprises a first groove base surface 65, which corresponds to the second base surface 51 of the centrifugal wedge 23, and a second groove base surface 67, which corresponds to the first base surface 49.
  • a screw hole 69 with an internal thread 70 is provided in the first groove base surface 65.
  • the screw hole 69 is collinear with the longitudinal axis 59, so that by turning the screw 29 the centrifugal wedge 23 from an upper clamping position, in which the closure element 25 and the cutting plate 15 are pressed firmly against the first groove wall 27, into a lower tool change position, in which the Cutting plate 15 can be removed in the radial direction, is movable.
  • the bottom surface 51 includes an angle of 90 90 degrees with the back surface 35
  • the angle between the first groove base surface 65 and the back surface 31 is preferably approximately 90 degrees. If the bottom surface 51 forms an angle of> 90 degrees with the back surface 35, the second bottom surface 51 of the centrifugal wedge 23 thus comes into contact with the first groove base surface 65 near the step 53 when the tool holder is opened. This acts on the centrifugal wedge 23 when it is reached a transverse force into the tool change position, which causes the centrifugal wedge 23 to tilt due to the existing tolerances of the screw threads ( Fig. 2 ). The closure element 25 and the cutting plate 15 are released from the first groove wall 27.
  • a special feature of the closure element 25 is that at least one, but preferably two or more, magnets 69 are provided in the lower region ( Fig. 5 ). These are preferably received in recesses 71 flush with the adjacent surface of the tool.
  • the magnets 69 serve to hold the cutting plates 15, which are usually made of a weakly magnetizable material, adhering to the closure element 25, in particular when changing tools, so that the same can be removed more easily.
  • two elastically deformable plastic knobs 73 are provided in the closure element 25 at a distance from one another. These can be inserted into corresponding holes 75 in the closure element 25.
  • the knobs 73 have the purpose of pushing the cutting plate 15 upward when tightening. The mode of operation of the knobs 73 is described in more detail below.
  • a U-shaped recess 77 is provided in the center of the rear fastening section for the lateral centering of the closure element 25 in the groove 19.
  • an axially adjustable centering pin 79 engages in this recess 77 and is received in a pin hole 81 of the tool head body ( 1 to 3 ).
  • the pin hole 81 is machined into the tool head body at an angle to the first groove wall 27.
  • a single groove 83 is provided in the first groove wall 27.
  • a stop bar 85 is received in a form-fitting manner in this groove 83.
  • the groove 83 and the corresponding stop bar 85 can be quadrangular or polygonal or round in cross section.
  • the stop bar 85 cooperates in the clamping position for a precise positioning with a groove 87 in the cutting plate 15 ( Fig. 6 ).
  • This groove 87 is a certain distance, preferably at least 5% and particularly preferably at least 10% wider than the stop bar 85.
  • the groove 87 is advantageously between 20% to 80% wider than the stop bar. In specific exemplary embodiments, the groove 87 is between 30% and 60% wider than the stop bar 85. It is conceivable that instead of the stop bar 85, a corresponding elongated stop 85a is formed directly in the groove wall 27.
  • the cutting plate 15, according to Fig. 6 is designed as a profile knife 21, can have a U-shaped recess 89 in the center of the tool base and analogous to the closure element 25, which serves to center the cutting plate 15.
  • the head of the centering pin 79 engages in the U-shaped recesses 77, 89 of the closure element 25 and the cutting plate 15, so that they come to lie exactly one above the other.
  • the cutting tip has a cutting edge 92 on the cutting tip face 90. On the edge diagonally opposite the cutting edge 92 has a functional surface in the form of a chamfer 94.
  • the first groove wall 27 is not a straight surface, but has a shoulder 91 at a distance from the groove base, against which the cutting plate can rest.
  • the rear (recessed) wall section above the shoulder 91 is designated in the present case with the reference number 93 and the front (upstream) wall section with the reference number 95.
  • the shoulder 91 has a depth which essentially corresponds to the thickness of a cutting plate 15 to be clamped. When the cutting plate 15 is inserted, the cutting plate face is thus essentially flush with the front wall section 95.
  • the groove 19 denotes those sections of the tool holder which cooperate in the tool holder.
  • the groove 19 accordingly has first and second groove walls 27 and 31 of unequal length.
  • the rear wall section 93 of the first groove wall 27 above the shoulder 91 can be inclined slightly inwards relative to the front wall section 95 and can assume an angle of up to 5 degrees (see FIG. Fig. 3 ). In this way, the tool can be biased even more strongly against the groove wall 27 in the front region.
  • the screw 29 for tensioning and loosening the centrifugal wedge 23 is preferably a threaded pin with a front and a rear threaded section 97, respectively. 99 trained ( Fig. 7 ).
  • the screw has an attack means 101 for a tool, for example an internal square or hexagon or a Torx® thread drive.
  • the front and rear threaded section 97.99 are separated from one another by a constriction 103.
  • the front threaded section 97 is designed to cooperate with the internal thread 70 of the screw hole 69.
  • the rear threaded section 99 is designed to cooperate with the internal thread 63 of the screw hole 57 formed in the centrifugal wedge 23.
  • front and rear threaded sections 97.99 have opposing screw threads.
  • the front threaded section 97 is a Left-hand thread and the rear threaded portion 99 a right-hand thread. This has the advantage that the screw can be turned in the usual direction to tension the centrifugal wedge. The radial position of the centrifugal wedge 23 changes by one thread turn with a full screw revolution.
  • a further modified embodiment of a centrifugal wedge 23 has a centering element 105 on the wedge surface 33 in the form of a centering knob protruding from the wedge surface 33 ( Fig. 8 ).
  • the centering element 105 serves for the lateral centering of the in the Figure 9 shown closure element 25a by means of positive locking.
  • a recess 77 in the surface oriented to the centrifugal wedge 23 instead of a recess 77 in the surface oriented to the centrifugal wedge 23, only a U-shaped recess 107 is formed. This depression 107 extends in the middle of the closure element 25a at a right angle from the base 109 of the closure element 25a (central axis 102). Further differences are that the closure element 25a has no magnets or plastic knobs.
  • the Figures 11 and 12th show a tool head 11a with the centrifugal wedge 23 and the closure element 25a according to Figure 9 .
  • the tool head 11a has a sleeve-shaped pressure element 113a, which is inserted into an enlarged, front pin hole section 115 of the pin hole 81.
  • the upper edge of the pressure element 113a protrudes from the front wall section 95 on the groove side at the shoulder 91.
  • the pressure element 113a presses in the changing position of the tool holder against the closure element 25a and biases it against the centrifugal wedge 23a.
  • the embodiment according to the Figures 13 and 14 differs from that of Figures 11 and 12th in that at least one pressure element 113b, but preferably two pressure elements 113b, is received in a separate blind hole 121 which is provided in the area of the shoulder 91 in the tool head body.
  • a blind hole 121 and a pressure element 113b are preferably provided symmetrically on both sides of the centering pin 79.
  • the mode of operation of the pressure element 113b is the same as that of the pressure element 113a, ie the part of the pressure element 113b protruding from the blind hole 121 and from the wall section 95 causes radial centering of the cutting plate 15 when clamped.
  • a further modification of this embodiment is in the area of the lateral positioning the insert 15 located.
  • the cutting plate 15 has no U-shaped recess for the lateral positioning. For lateral positioning, the positioning pin 79 is displaced axially outside of the cutting plate 15, so that the cutting plate 15 can be struck on the positioning pin 79 either on the
  • the Figures 15 and 16 show a further tool head 11c, in which the tool holder 13a represents a less deep cut than in the tool heads described above and the cutting plate 15a has only a small height and two cutting edges 92a, 92b.
  • the closure element 25c is also shorter than in the other exemplary embodiments.
  • the tool head 11c has a stop bar 85a which is integral with the tool body.
  • a centering pin is also not arranged in the center, but rather a lateral stop for the lateral centering of the cutting plate (not shown in the figures). Otherwise, the tool head 11c corresponds in terms of function and structure to the other tool heads, so that a more detailed description can be dispensed with.
  • the tool head 11d represents a flattening knife head, which differs from the previously described embodiments in that the Tool holder 13 is not provided in the circumference but in the end face 123 of the tool head 11d. Due to this construction, the centrifugal forces generated when the tool head is rotating only act to a small extent on the closure element 25 and the cutting plate 15. In order to keep the centrifugal wedge 23 precisely in the groove 19, two spaced-apart reinforcing elements 125 projecting from the wall are provided in the groove wall 31 and cooperate in a form-fitting manner with corresponding grooves 127 in the centrifugal wedge 23.
  • a modified clamping mechanism is shown. This differs from those described above in that the clamping screw 29a only has a rear thread 99.
  • a head 129 is provided on the front of the tensioning screw 29a and is supported on the groove base 65, 67.
  • a centering extension 131 is formed on the head 129, which engages in the screw hole 60, which in this case does not have to have an internal thread.
  • the centering extension can also be dispensed with, since it is not required for clamping the cutting insert.
  • the described embodiment of a tool head is otherwise not provided with a closure element, but the centrifugal wedge 23 acts directly on the cutting plate 15.
  • the Figures 19 to 21 show an embodiment of a pressure element 133, on the one hand, the function of the centering pin described above (see. Fig. 3 ) for the lateral alignment of the insert and on the other hand the pressure element for the radial positioning of the insert.
  • the pressure element 133 has a rear clamping section 135, comparable to a heavy-duty clamping pin, which can be inserted into the pin hole 81.
  • a spring tongue 137 is formed on the tensioning section 135 with a terminal lug 139 which, when inserted into the pin hole 81, projects beyond the front wall section 95. As in the 20 and 21 shown, the spring tongue 137 presses with the lug 139 onto the closure element 25, pushes it away and thus facilitates the removal of the cutting plate 15 when the centrifugal wedge is released ( Fig. 21 ).
  • the tool head according to the invention is used as follows: To insert a new cutting insert into the tool head according to the Figures 1 to 3 the centrifugal wedge 23 is first brought into contact with the bottom of the groove by the Tensioning screw is turned as far as possible in the corresponding direction of rotation. In the tool change position then assumed, the centrifugal wedge 23 is tilted relative to the first groove wall 27, so that a gap which opens in the radial direction is formed between the closure element 25 and the rear wall section 93 of the groove wall 27 ( Fig. 2 ). The new insert can now be inserted into the gap, the centering pin 79 ensuring the correct lateral centering of the insert 15. In the position now assumed, the cutting plate 15 rests on the shoulder 91.
  • the elastically deformable pressure elements 73, 113a, 113b can also touch the base of the insert or be arranged at a short distance from it. If the screw 29 is now rotated in the clamping direction, the pressure elements 73, 113a, 113b are clamped between the front wall section 95 and the closure element. These expand laterally and push the cutting insert radially outward, so that the cutting insert rests with the lower edge 100 of the groove 87 on the stop bar 85. The position of the groove 87 and in particular of the lower edge 100 in relation to the insert base area 108 plays an important role. This is the only way to ensure that the expansion of the pressure elements when clamping the tool is sufficient to ensure exact positioning of the cutting plate in the radial direction already during the clamping process.
  • the tool head according to the invention is used, in particular, for the machining of wood, plastic and similar materials, in which the method for processing and for removing chips or particles is similar. Similar materials are, for example, cork, bone, plastic, light metal alloys, wood-based materials such as chipboard, fibreboard, plywood, etc. Cutting plates with a straight, curved or profiled cutting edge are used as tools.
  • the inserts consist of flat blades with a thickness between approximately 1 mm and 3 mm.
  • the cutter head is rotatably arranged in operation on a spindle of a woodworking machine, wherein other cutter heads can be attached directly adjacent to the spindle.
  • the centrifugal wedge (tensioning and loosening) can be adjusted by means of a single screw for all application widths.
  • the cutting insert is already pressed against the stop bar 85 in the direction of flight during clamping, so that the cutting insert can no longer move when the tool head is rotating.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling Processes (AREA)
  • Drilling Tools (AREA)
  • Food-Manufacturing Devices (AREA)
  • Gripping On Spindles (AREA)
EP19206429.3A 2014-04-14 2015-04-14 Werkzeugkopf und verfahren zum positionieren einer schneidplatte in der werkzeugaufnahme des werkzeugkopfes Pending EP3623127A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00569/14A CH709488A1 (de) 2014-04-14 2014-04-14 Werkzeugkopf und Verfahren zum Einsetzen und Spannen einer Schneidplatte, sowie Schneidplatte.
PCT/CH2015/000055 WO2015157871A2 (de) 2014-04-14 2015-04-14 Werkzeugkopf und verfahren zum einsetzen und spannen einer schneidplatte, sowie schneidplatte
EP15717077.0A EP3131719B1 (de) 2014-04-14 2015-04-14 Werkzeugkopf und verfahren zum einsetzen und spannen einer schneidplatte, sowie schneidplatte

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP15717077.0A Division-Into EP3131719B1 (de) 2014-04-14 2015-04-14 Werkzeugkopf und verfahren zum einsetzen und spannen einer schneidplatte, sowie schneidplatte
EP15717077.0A Division EP3131719B1 (de) 2014-04-14 2015-04-14 Werkzeugkopf und verfahren zum einsetzen und spannen einer schneidplatte, sowie schneidplatte

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EP3623127A1 true EP3623127A1 (de) 2020-03-18

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CH709488A1 (de) 2014-04-14 2015-10-15 Oertli Werkzeuge Ag Werkzeugkopf und Verfahren zum Einsetzen und Spannen einer Schneidplatte, sowie Schneidplatte.
DE102014015199A1 (de) * 2014-10-10 2016-04-14 Leitz Gmbh & Co. Kg Messerkopf zur spanenden Bearbeitung von Werkstoffen und Messer hierfür
DE102016204300A1 (de) * 2016-03-16 2017-09-21 Robert Bosch Gmbh Werkzeugmaschinenvorrichtung
US10528088B2 (en) * 2016-09-28 2020-01-07 Microsoft Technology Licensing, Llc Opening state detection of a foldable device using self-capacitance
CH713020A1 (de) 2016-10-10 2018-04-13 Oertli Werkzeuge Ag Messerkopf und Messerkopfsystem, insbesondere für eine Holzbearbeitungsmaschine.
IT201800008191A1 (it) * 2018-08-27 2020-02-27 Twt Srl Dispositivo di fissaggio degli inserti taglienti di frese da taglio
AT521821B1 (de) * 2018-11-14 2020-11-15 Aigner Werkzeuge Ges M B H Werkzeugkopf zur Bearbeitung von Werkstücken bei hohen Rotationsgeschwindigkeiten
DE102019111986B3 (de) * 2019-05-08 2020-09-17 Leitz Gmbh & Co. Kg Verfahren zum Schärfen eines in einen Messerkopf einsetzbaren Messers und Messerkopf mit geschärftem Messer
TWI768610B (zh) * 2020-07-22 2022-06-21 林翔 刮刮卡用之刮削器具
WO2024119256A1 (pt) * 2022-12-06 2024-06-13 Irani Papel E Embalagem S.A. Dispositivo de corte para resinador mecânico

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WO2015157871A3 (de) 2015-12-03
CN106488835B (zh) 2022-10-14
CN106488835A (zh) 2017-03-08
EP3131719B1 (de) 2020-02-12
US11298851B2 (en) 2022-04-12
US20170028583A1 (en) 2017-02-02
US20200130224A1 (en) 2020-04-30
EP3131719A2 (de) 2017-02-22
CH709488A1 (de) 2015-10-15
WO2015157871A2 (de) 2015-10-22
DK3131719T3 (da) 2020-05-18
LT3131719T (lt) 2020-05-25
PL3131719T3 (pl) 2020-08-24

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