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EP4385694B1 - Procédé de réparation d'un outil de détensionnement - Google Patents

Procédé de réparation d'un outil de détensionnement

Info

Publication number
EP4385694B1
EP4385694B1 EP22214270.5A EP22214270A EP4385694B1 EP 4385694 B1 EP4385694 B1 EP 4385694B1 EP 22214270 A EP22214270 A EP 22214270A EP 4385694 B1 EP4385694 B1 EP 4385694B1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting insert
receiving pocket
height
new
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.)
Active
Application number
EP22214270.5A
Other languages
German (de)
English (en)
Other versions
EP4385694C0 (fr
EP4385694A1 (fr
Inventor
Oliver Galli
Steffen Hampel
Benjamin Sitzler
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.)
Ledermann GmbH and Co KG
Original Assignee
Ledermann GmbH and Co KG
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 Ledermann GmbH and Co KG filed Critical Ledermann GmbH and Co KG
Priority to EP22214270.5A priority Critical patent/EP4385694B1/fr
Publication of EP4385694A1 publication Critical patent/EP4385694A1/fr
Application granted granted Critical
Publication of EP4385694C0 publication Critical patent/EP4385694C0/fr
Publication of EP4385694B1 publication Critical patent/EP4385694B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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

Definitions

  • the invention relates to a method for repairing a cutting tool according to the preamble of claim 1. Such a method is known from the document US 6 189 584 B1 known.
  • rotary-driven cutting tools are widely used. These comprise a tool body and at least one, usually several, cutting inserts, each separate from the tool body, each with a cutting edge.
  • the tool body is provided with receiving pockets, each holding a cutting insert.
  • the tool body is provided with a radially protruding elevation, the so-called stud, on the rear side of the receiving pocket.
  • the rear wall of the receiving pocket and the front surface of the studs together form a continuous support surface against which the rear sides of the individual cutting inserts rest, thereby supporting them against the cutting forces that occur.
  • the cutting inserts only have a limited service life; after this time, the cutting tool becomes blunt. To repair the cutting tool, the cutting edges are resharpened.
  • the invention is based on the object of providing a method for repairing a cutting tool which enables a long service life of the cutting tool.
  • the method according to the invention provides for the cutting edge of the cutting insert to be resharpened at least once. After resharpening at least once, the cutting insert, on which the cutting edge is arranged, protrudes radially relative to the rotation axis beyond the outer contour of the rotating body by a resharpening height. If the resharpening height falls below a threshold height, the cutting insert is removed from the contact surface of the receiving pocket, and a new cutting insert with a new cutting edge is inserted onto the contact surface in the receiving pocket.
  • the invention is based on the finding that in a tool body without studs, as in the more recent prior art according to the documents EP 3 354 387 A1 and DE 10 2020 109 739 A1 As described, the replacement of a cutting insert is possible even after the cutting edge of the cutting insert has been resharpened. This makes it possible to use the cutting tool, in particular the tool body of the cutting tool, for a much longer period of time than in the prior art.
  • the tool body and in particular the contact surface for the cutting insert are not damaged when resharpening cutting inserts in a cutting tool according to claim 1. This allows a new cutting insert to be inserted onto the undamaged contact surface in the receiving pocket.
  • the cutting tool used in the method according to the invention is designed, at least in sections, as a rotating body with respect to the rotational axis.
  • the at least one receiving pocket is machined into the surface of the rotating body and has a contact surface for the cutting insert.
  • the contact surface for the cutting insert lies within the circumferential contour of the rotating body. In particular, the cutting insert protrudes freely and unsupported from the receiving pocket beyond the outer contour of the rotating body.
  • the tool body is designed as a rotating body, its surface can be easily produced by turning. Milling work is limited to creating the receiving pockets for the cutting inserts. From a geometric perspective, a rotating body is formed, from whose otherwise undisturbed, rotating surface the receiving pockets extend exclusively radially inward, and without any parts or sections of the tool body protruding radially beyond the undisturbed, rotating surface of the tool body. The only parts of the cutting tool that protrude radially outward beyond the undisturbed, rotating surface of the tool body are the cutting edges of the inserted cutting inserts.
  • the initial height by which the cutting edge of the cutting insert protrudes from the receiving pocket beyond the outer contour of the rotating body in the radial direction relative to the rotation axis before its very first use can expediently be reduced to the resharpening height in such a way that the size of the contact surface of the receiving pocket is the same before the very first use of the cutting insert and after it has been resharpened at least once.
  • the initial height can be reduced to the limit height in such a way that the size of the contact surface of the receiving pocket is the same before the very first use of the cutting insert and after it has been resharpened at least once.
  • the initial height can expediently be reduced to the resharpening height, in particular to the limit height, in such a way that the shape of the tool body can remain unchanged compared to the state before the very first use of the cutting insert.
  • the tool body is not affected by resharpening.
  • the resharpening height is smaller than the initial height.
  • the cutting tool is ready for cutting use after resharpening.
  • the cutting edge of the cutting plate is resharpened several times before the new cutting plate is inserted onto the contact surface in the receiving pocket.
  • the cutting edge by resharpening the cutting edge, in particular by repeatedly resharpening the cutting edge, it is possible to reduce the cutting insert from its initial height to the resharpened height by at least 0.8 mm.
  • the size of the contact surface of the receiving pocket is the same before the very first use of the cutting insert and after the reduction of the cutting insert by resharpening the cutting edge, in particular by repeatedly resharpening the cutting edge.
  • the difference between the initial height and the limit height is at least 0.8 mm. This allows the cutting insert to be used efficiently.
  • the cutting insert is reduced from the initial height by at least 0.8 mm to the resharpening height before it is removed from the contact surface of the receiving pocket.
  • the cutting insert is bonded to the contact surface of the receiving pocket by means of a material connection before the cutting insert is used for the very first time.
  • the material connection is a soldered connection. This results in a surface attachment of the cutting insert with good holding and support effect.
  • the tool body can be kept very simple in design.
  • the material connection with which the cutting inserts are bonded to the contact surface of the receiving pocket can be easily broken if the resharpening height falls below the limit height. Removing the cutting insert from the receiving pocket is straightforward.
  • the material connection between the cutting insert and the contact surface of the receiving pocket is expediently broken before the cutting insert is removed from the contact surface of the receiving pocket.
  • the new insert is bonded to the contact surface of the receiving pocket by means of a material connection when the new insert is inserted into the receiving pocket.
  • the new insert is bonded to the contact surface of the receiving pocket by means of a material connection by soldering the new insert to the contact surface. This allows for simple and straightforward insertion of the new insert.
  • the cutting edge of the cutting insert is made of polycrystalline diamond. This ensures a correspondingly long service life. According to the invention, the new cutting edge of the cutting insert is made of polycrystalline diamond.
  • the new insert has a new cutting edge.
  • the new insert protrudes with its new cutting edge on the receiving pocket beyond the outer contour of the rotating body in the radial direction by a new initial height.
  • the new initial height of the new insert is advantageously at least 70% of the initial height of the insert before the very first use of the insert.
  • the new initial height is at least 90% of the initial height of the insert before the very first use of the insert.
  • the new initial height corresponds to the new
  • the cutting insert has the same initial height as the cutting insert before its very first use.
  • the new initial height is advantageously at least 100% of the initial height of the cutting insert before its very first use. This makes it possible to repair the cutting tool so that its functionality corresponds to that of the cutting tool before its very first use.
  • the newly inserted cutting insert is supported in the same way in the receiving pocket.
  • the new cutting insert can be resharpened just as often as the old cutting insert.
  • the new initial height of the new cutting insert is at most 1.5 mm smaller than the initial height of the cutting insert before the very first use of the cutting insert.
  • the contact surface of the receiving pocket for the cutting insert comprises a support surface.
  • the support surface lies within the circumferential contour of the rotating body.
  • the support surface expediently supports the cutting insert against any cutting forces that may occur.
  • the support surface is delimited by the circumferential contour of the rotating body.
  • the contact surface is formed exclusively by the support surface. This enables particularly simple detachment of the cutting insert from the contact surface.
  • the contact surface is therefore particularly easily accessible.
  • the support surface can be designed to be large. The cutting insert, or the new cutting insert, can be reliably held and supported. Expediently, the support surface extends essentially radially to the axis of rotation.
  • the cutting tool has a plurality of receiving pockets and a plurality of cutting inserts.
  • the plurality of cutting inserts when one of the plurality of cutting inserts is removed from the associated receiving pocket, all of the plurality of cutting inserts are removed from the other associated receiving pockets.
  • new cutting inserts are then inserted into all of the receiving pockets associated with the plurality of cutting inserts.
  • a complete replacement of all cutting inserts takes place. takes place, in particular as soon as the resharpening height for one of the several cutting plates falls below the limit height.
  • the surface of the rotating body can be turned bright and accordingly smooth.
  • a surface structure is formed on the surface of the rotating body to reduce noise emissions.
  • Such a surface structure can expediently be formed in particular on a circumferential surface and/or on at least one end face of the rotating body.
  • the term surface structure refers to structures that are based on the circumferential surface of the rotating body and that are produced in particular in a circumferentially rotating process. This can be knurling, for example.
  • the surface structure is expediently formed as a groove structure running in the circumferential direction of the rotating body and can therefore be easily produced by turning.
  • the surface structure does not have to completely cover the surface of the rotating body, but advantageously extends right up to the edge of the receiving pocket, where it is intersected by at least one wall of the receiving pocket.
  • Fig. 1 to 11 show a total of three different embodiments of a cutting tool on which the method according to the invention is carried out.
  • the following description generally applies to all three embodiments. Therefore, the same reference numerals are used for all embodiments. Any deviations between the embodiments will be explicitly noted.
  • the Fig. 1 to 4 show a cutting tool 1 with a substantially cylindrical tool body 2, which has a groove-shaped surface structure 6 on its peripheral side 7 and on its front side 8.
  • the cutting tool 1 according to the Fig. 5 to 7 differs from the cutting tool 1 according to the Fig. 1 to 4 in that it has no surface structure, but has a smooth surface on both its peripheral side 7 and its front side 8.
  • Fig. 8 shows a cutting tool 1 designed as an end mill.
  • the surface of the end mill is smooth on both its peripheral side 7 and its front side 8.
  • the Fig. 9 to 11 show the individual process steps as examples for all embodiments carried out on the cutting tool 1 according to the Fig. 1 to 4 .
  • Figs. 12 and 13 show a cutting tool 30 from the prior art, the tool body 31 of which has studs 32 as support surfaces for cutting inserts 33.
  • Fig. 12 shows the cutting tool 30 before resharpening the cutting plate 33 and Fig. 13 shows it after resharpening the cutting insert 33.
  • a comparison of the two figures shows that the stud 32 is at least partially removed during resharpening. A newly inserted cutting insert with the original height of the cutting insert 33 would no longer be adequately supported by the removed stud 32 and would not be able to absorb the cutting forces occurring during operation without sustaining damage or becoming detached from the tool body 31. Replacing the cutting inserts 33 is not provided for in the prior art.
  • the cutting tool 1 according to the invention is used for machining wood or similar materials. Similar materials here refer to materials with physical and technological properties similar to those of wood, such as cork, bone, plastic, light metal alloys, wood-based materials such as chipboard, wood fiberboard, plywood, etc., and for which the process for machining and removing chips or particles is similar.
  • the cutting tool 1 comprises a tool base body 2 and at least one, here several, cutting inserts 10.
  • the tool base body 2 is made in one piece from steel, but can also be made of another suitable material.
  • the cutting inserts 10 are formed separately from the tool base body 2 as individual parts and are attached to the tool base body 2.
  • the cutting tool 1 and its tool base body 2 have a common axis of rotation 3.
  • the cutting tool 1 driven to rotate about this axis of rotation 3 in a direction of rotation 4, wherein outer cutting edges 11 of the cutting plates 10 are brought into engagement with a workpiece (not shown) and chips are removed.
  • the tool body has a surface 5.
  • the tool body 2 is essentially cylindrical with a circumferential surface 7 and two axially opposite end faces 8.
  • a conical shape or another shape may also be expedient.
  • the cutting edges 11 protrude radially and/or axially beyond the outer contour of the tool body 2 so that sufficient free space remains between the workpiece and the surface 5 of the tool body 2 during the machining process.
  • the surface 5 is formed by the circumferential surface 7 and the end faces 8.
  • the tool base body 2 is geometrically designed, at least in sections, as a rotary body 20 with respect to the rotation axis 3. In other words, this means that in this area, the surface of the tool base body 2 is formed by a 360° rotation of a contour line around the rotation axis 3. According to the invention, recesses can be machined into the surface of the rotary body 20, for example, to form receiving pockets 13 for the cutting inserts 10. However, no elevations of the tool base body 2 protrude above the undisturbed surface of the rotary body 20.
  • the tool base body 2 is completely designed as a rotary body 20, 20', both in the region of its circumferential surface 7 and in the region of its two end faces 8. Within the scope of the invention, however, it may also be expedient to design only one of the two end faces 8, only a part of the circumferential surface 7, or in another suitable manner only a section of the tool base body as a rotary body 20.
  • Receiving pockets 13 for the cutting inserts 10 are machined into the surface of the rotating body 20, 20'.
  • one cutting insert 10 is attached in such a way that its cutting edge 11 protrudes from the receiving pocket 13 beyond the outer contour of the rotating body 20.
  • several receiving pockets 13 are provided. Accordingly, several cutting plates 10 are also provided.
  • a radial direction 50 is defined with respect to the rotational axis 3.
  • the radial direction 50 points radially away from the rotational axis 3, in particular in all directions perpendicular to the rotational axis 3.
  • the radial direction 50 runs perpendicular to the rotational direction 4.
  • the cutting insert 10 protrudes beyond the outer contour of the rotating body 20 in the radial direction 50.
  • the cutting edge 11 of the cutting insert 10 is arranged outside the outer contour of the rotating body 20 in the radial direction 50.
  • the receiving pocket 13 is arranged within the outer contour of the rotating body 20 with respect to the radial direction 50.
  • the cutting edges 11 of the cutting inserts 10 are preferably made of polycrystalline diamond (PCD).
  • PCD polycrystalline diamond
  • a PCD layer can be sintered onto a hard metal substrate. It is also conceivable that these are pure PCD cutting inserts, particularly with a thickness between 0.6 mm and 2.0 mm.
  • the Fig. 2 and 3 show in enlarged detail view the tool body 2 after Fig. 1 in the area of its peripheral surface 7.
  • the Figs. 6 and 7 in an enlarged detailed view of the tool body 2 after Fig. 5 in the area of its peripheral surface 7.
  • the cutting plates 10 are not shown.
  • receiving pockets 13 are formed there, which extend radially inwards from the undisturbed surface of the rotating body 20.
  • the receiving pockets 13 are formed by a circumferential surface edge 9, at which the surface of the rotation body 20 is cut by the walls of the receiving pocket 13.
  • the receiving pocket 13 comprises a contact surface 16.
  • the contact surface 16 serves to support the cutting insert 10.
  • the contact surface 16 comprises a support surface 22.
  • the support surface 22 serves to support the cutting insert 10 against cutting forces occurring during operation of the cutting tool 1.
  • the support surface 22 runs transversely to the direction of rotation 4.
  • the support surface 22 lies radially within the circumferential contour of the rotating body 20.
  • the support surface 22 forms the entire contact surface 16.
  • the contact surface 16 is formed exclusively by the support surface 22.
  • the contact surface 16 is formed in the rear region of the receiving pocket 13 with respect to the direction of rotation 4. However, it can also be provided that the contact surface extends at least partially in a surface transverse to the radial direction. According to the illustration according to Fig. 3 , or Fig. 7 the cutting plate 10 rests on the contact surface 16.
  • the cutting inserts 10 are attached to the contact surfaces 16.
  • the cutting insert 10 is attached to the contact surface 16 by means of a material bond.
  • the cutting insert 10 is soldered to the contact surface 16.
  • other material bonds between the cutting inserts 10 and their contact surfaces 16, such as gluing or the like, are also possible.
  • the contact surface 16 lies radially within the circumferential contour of the rotating body. In the exemplary embodiments, the contact surface 16 is delimited by the rotating body.
  • both points lie at the same axial and radial position.
  • the surface edge 9 at least does not protrude from the rotating body.
  • at least part of the surface edge 9 or even the entirety can be arranged at a distance from the rotating body within the rotating body.
  • a surface structure 6 for reducing noise emissions is formed on the surface of the rotating body 20.
  • the surface structure can be knurling or the like and, in the preferred embodiment shown, is formed as a groove structure running in the circumferential direction of the rotating body 20, which groove structure is produced by turning. It may be expedient to provide only part of the rotating body 20 with a surface structure.
  • the rotating body 20 has a completely structured surface.
  • the surface structure extends right up to the edge or surface edges 9 of the receiving pockets 13, so that the groove structure is interrupted by the receiving pockets 13.
  • the walls of the receiving pockets 13 intersect the structured surface or the groove structure, as a result of which the surface edges 9 run in a jagged or wavy manner and act as aerodynamic turbulators for noise reduction.
  • Fig. 4 shows a detailed view of the cutting tool after the Fig. 1 to 3 in the region of one of its end faces 8. Accordingly, it can be seen that the receiving pockets 13 can be open not only in the radial direction, but also in the axial direction.
  • the end face 8 designed as a rotating body 20' is interrupted by axially inward-extending receiving pockets 13, forming surface edges 9. Since the end face 8 designed as a rotating body 20' is also provided with a surface structure 6, a similarly wavy or jagged course of the surface edges 9 results.
  • the relationships mentioned are described here as an example for a cylindrical tool base body 2 with a circumferential surface 7 designed as a rotating body 20 and with end faces 8 designed as rotating bodies 20', but also apply analogously to other basic geometric shapes of the tool base body 2.
  • Fig. 9 shows the cutting tool 1 before the very first use of the cutting insert 10.
  • the cutting insert 10 is completely unused.
  • the cutting insert 10 is, in particular, brand new.
  • the cutting insert 10 is in Fig. 9 not yet sharpened. This applies in Fig. 9 for all cutting inserts 10.
  • resharpening does not refer to a process step in the manufacture of the cutting tool in which the cutting inserts 10 are initially and once brought to the same height or level with respect to the radial direction 50. Resharpening can only take place after this initial height adjustment, in particular after use of the cutting tool 1.
  • the cutting insert 10 is secured in the receiving pocket 13 and, prior to its very first use, protrudes from the receiving pocket 13 beyond the outer contour of the rotating body 20 in the radial direction 50 by an initial height ha.
  • the very first use is referred to as the very first operation of the cutting tool 1 in which the cutting edge 11 of the cutting insert 10 machines a workpiece. With very first use This refers to the time immediately before the very first use. Therefore, at this point, the height of the cutting plates 10 has already been adjusted to a uniform level.
  • the initial height ha is measured in the radial direction 50 from the outer contour of the rotating body 20 to the point on the cutting insert 10 that is furthest away from the rotation axis 3 in the radial direction 50.
  • the initial height ha is measured in the radial direction 50 perpendicular to the outer contour of the rotating body 20.
  • the cutting edge 11 is a component of the cutting insert 10.
  • the cutting edge 11 is also referred to as the cutting edge.
  • the cutting edge 11 lies completely outside the outer contour of the rotating body 20 in the radial direction 50.
  • the cutting edge 11 of the cutting plate 10 made of Fig. 9 is resharpened at least once.
  • EDM abbreviated to electrical discharge machining, also known as spark erosion machining, spark erosive removal (DIN 8580), or electroerosive machining
  • spark erosion machining is a thermal, abrasive process for conductive materials that relies on electrical discharge processes (sparks) between the electrode as the tool and the conductive workpiece, in this case the cutting insert 10, in particular the cutting edge 11.
  • the cutting insert 10 which is still fastened in the receiving pocket 13, protrudes in the radial direction 50 beyond the outer contour of the rotating body 20 by a resharpening height hn after it has been resharpened at least once.
  • the resharpening height hn of the cutting insert 10 after resharpening is measured in the radial direction 50 from the outer contour of the rotating body 20 to the point on the cutting insert 10 furthest away from the rotation axis 3 in the radial direction 50.
  • the resharpening height hn is measured in the radial direction 50 perpendicular to the outer contour of the rotating body 20.
  • the resharpening height hn is smaller than the initial height ha. If the resharpening height hn of the cutting insert 10, after it has been resharpened, falls below a limit height hg, the cutting insert 10 is removed from the contact surface 16 of the receiving pocket 13.
  • the limit height hg is measured in the radial direction 50 perpendicular to the outer contour of the rotating body 20.
  • the limit height hg of the cutting insert 10 is measured in the radial direction 50 from the outer contour of the rotating body 20. In Fig. 10 the resharpening height hn falls below the limit height hg, so that the cutting plate 10 is removed from the contact surface 16.
  • a new cutting insert 110 is inserted onto the contact surface 16 in the receiving pocket 13 of the tool base body 2 of the cutting tool 1.
  • Fig. 11 shows the unchanged tool body 2 with a new cutting insert 110.
  • the cutting tool 1, in particular the tool body 2, can continue to be used even though at least one of the cutting inserts 10 has reached the end of its life cycle. Replacing the entire cutting tool 1, and in particular the tool body 2, is not necessary.
  • the new cutting plate 110 has a new cutting edge 111.
  • the new cutting edge 111 is arranged in the radial direction 50 outside the outer contour of the rotating body 20.
  • the initial height ha can be reduced to the resharpening height hn in such a way that the size of the contact surface 16 of the receiving pocket 13 is the same before the very first use of the cutting insert 10 and after the cutting insert 10 has been resharpened at least once.
  • the initial height ha can be reduced to the limit height hg in such a way that the size of the contact surface 16 of the receiving pocket 13 is the same before the very first use of the cutting insert 10 and after the cutting insert 10 has been resharpened at least once.
  • the contact surface 16 unaffected by the resharpening of the cutting plate 10.
  • the size of the Fig. 2 and 6 The support surface 22 shown is in front of ( Fig. 9 ) and after ( Fig. 10 ) the cutting plate 10 was resharpened the same size.
  • the initial height ha can be reduced to the resharpening height hn such that the shape of the tool body 2 remains unchanged compared to the state before the very first use of the cutting insert 10.
  • the initial height ha can be reduced to the limit height hg such that the shape of the tool body 2 remains unchanged compared to the state before the very first use of the cutting insert 10. This is shown by a comparison of the Fig. 9 and 10 .
  • the cutting edge 11 By resharpening the cutting edge 11, in particular by multiple resharpening of the cutting edge 11, a reduction of the cutting plate 10 from the Fig. 9
  • the initial height ha shown can be reduced to the resharpening height hn by at least 0.8 mm. Even if the cutting insert 10 is reduced from the initial height ha to the resharpening height hn by 0.8 mm, the size of the contact surface 16 of the receiving pocket 13 remains the same as before the very first use of the cutting insert 10.
  • the difference between the initial height ha and the limit height hg is at least 0.8 mm.
  • the cutting edge 11 is resharpened several times before the cutting plate 10 falls below the limit height hg.
  • the cutting plate 10 is connected to the contact surface 16 of the receiving pocket 13 by means of a material bond, in the exemplary embodiment by means of a soldered connection.
  • solder joint can be heated for this purpose. This can be achieved, for example, by means of an electromagnetic induction effect by inducing current into the cutting plate 10 or the tool body 2. This process is also referred to as inductive soldering.
  • the new cutting insert 110 is connected to the contact surface 16 of the receiving pocket 13 by means of a material bond.
  • the new cutting insert 110 is brazed to the contact surface 16 when the new cutting insert 110 is inserted onto the contact surface 16 in the receiving pocket 13.
  • the new cutting insert 10 or the tool body 2 is heated by inducing current into the cutting insert 10 or the tool body 2.
  • the brazed connection between the new cutting insert 110 and the contact surface 16 is established by inductive brazing.
  • the new cutting insert 110 which is then secured in the receiving pocket 13, protrudes from the receiving pocket 13 beyond the outer contour of the rotating body 20 in the radial direction 50 by a new initial height han.
  • the new initial height han is measured in the radial direction 50 from the outer contour of the rotating body 20 to the point of the new cutting insert 110 that is furthest away from the rotation axis 3 in the radial direction 50.
  • the new initial height han is measured in the radial direction 50 perpendicular to the outer contour of the rotating body 20.
  • the new cutting insert 110 has a new cutting edge 111.
  • the new cutting edge 111 is a component of the new cutting insert 110.
  • the new cutting edge 111 is also referred to as the new cutting edge.
  • the new cutting edge 11 is located completely outside the outer contour of the rotating body 20 in the radial direction 50.
  • the new initial height han of the new cutting plate 110 shown is at least 70% of the Fig. 9 shown initial height ha of the cutting plate 10 before the very first use of the cutting plate 10.
  • the new initial height han of the new Cutting plate 110 is in particular at least 90% of the initial height ha of the cutting plate 10 before the very first use of the cutting plate 10.
  • the new initial height han of the new cutting plate 110 is in the exemplary embodiments at least 100% of the initial height ha of the cutting plate 10 before the very first use of the cutting plate 10.
  • the new initial height han of the new cutting plate 110 corresponds approximately to the initial height ha of the cutting plate 10 before the very first use of the cutting plate 10.
  • the new initial height han of the new cutting plate 110 is from 90% to 110% of the initial height ha of the cutting plate 10 before the very first use of the cutting plate 10.
  • the new cutting plate 110 which is inserted into the receiving pocket 16, is structurally identical to the cutting plate 10 before its very first use.
  • the new cutting insert 110, in particular the cutting tool 1, is ready for use with the new initial height han.
  • the new initial height han of the new cutting plate 110 is at most 1.5 mm, in the exemplary embodiments at most 1.0 mm smaller than the initial height ha of the cutting plate 10 before the very first use of the cutting plate 10.
  • the cutting edge 11 of the cutting insert 10 is made of polycrystalline diamond.
  • the new cutting edge 111 of the new cutting insert 110 is made of polycrystalline diamond.
  • the overhang height is then the height referred to above as the new initial height and meets all the criteria described in this context, in particular with regard to the ratio of new initial height to initial height.

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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)

Claims (15)

  1. Procédé de remise en état d'un outil d'usinage, l'outil d'usinage (1) comprenant :
    - un corps de base d'outil (2) et
    - au moins une plaquette de coupe (10) séparée du corps de base d'outil (2) avec un tranchant (11), le tranchant (11) de la plaquette de coupe (10) étant formé de diamant polycristallin,
    le corps de base d'outil (2) présentant un axe de rotation (3) et tournant autour de l'axe de rotation (3) dans une direction de rotation (4) pendant le fonctionnement de l'outil d'usinage (1), et le corps de base d'outil (2) étant pourvu d'au moins une poche de réception (13) pour la plaquette de coupe (10), le corps de base d'outil (2) étant réalisé sous forme corps de rotation (20) au moins par sections par rapport à l'axe de rotation (3), l'au moins une poche de réception (13) étant usinée dans la surface du corps de rotation (20) et présentant une surface d'application (16) pour la plaquette de coupe (10) située à l'intérieur du contour périphérique du corps de rotation (20), l'au moins une poche de réception (13) étant délimitée par un bord de surface (9) périphérique, au niveau duquel la surface du corps de rotation (20) est coupée par les parois de la poche de réception (13), la plaquette de coupe (10) s'appliquant contre la surface d'application (16) de la poche de réception (13), la plaquette de coupe (10) étant fixée à la surface d'application (16) au moyen d'une liaison de matière, et la plaquette de coupe (10), avant sa toute première utilisation, faisant saillie par son tranchant (11) hors de la poche de réception (13) d'une hauteur initiale (ha) au-dessus du contour extérieur du corps de révolution (20) dans la direction radiale (50) par rapport à l'axe de rotation (3),
    caractérisé en ce que
    - le tranchant (11) de la plaquette de coupe (10) est réaffûté au moins une fois par érosion, en ce que la plaquette de coupe (10), après avoir été réaffûtée au moins une fois, fait saillie par son tranchant (11) hors de la poche de réception (13) d'une hauteur de réaffûtage (hn) au-dessus du contour extérieur du corps de rotation (20) dans la direction radiale (50) par rapport à l'axe de rotation (3), la hauteur de réaffûtage (hn) étant inférieure à la hauteur initiale (ha),
    - en ce que la plaquette de coupe (10) est retirée de la surface d'application (16) de la poche de réception (13) lorsque la hauteur de réaffûtage (hn) passe en dessous d'une hauteur limite (hg), et
    - en ce qu'une nouvelle plaquette de coupe (110) avec un nouveau tranchant (111) est ensuite insérée sur la surface d'application (16) dans la poche de réception (13).
  2. Procédé selon la revendication 1,
    caractérisé en ce que la hauteur initiale (ha) peut être réduite à la hauteur de réaffûtage (hn), notamment à la hauteur limite (hg), de telle sorte que la taille de la surface d'application (16) de la poche de réception (13) soit la même avant la toute première utilisation de la plaquette de coupe (10) et après avoir été réaffûtée au moins une fois.
  3. Procédé selon la revendication 2,
    caractérisé en ce que la hauteur initiale (ha) peut être réduite à la hauteur de réaffûtage (hn), notamment à la hauteur limite (hg), de telle sorte que la forme du corps de base d'outil (2) peut être inchangée par rapport à l'état avant la toute première utilisation de la plaquette de coupe (10).
  4. Procédé selon la revendication 2 ou 3,
    caractérisé en ce qu'en réaffûtant le tranchant (11), notamment en réaffûtant plusieurs fois le tranchant (11), il est possible de réduire la plaquette de coupe (10) d'au moins 0,8 mm de la hauteur initiale (ha) à la hauteur de réaffûtage (hn) et, en même temps, la taille de la surface d'application (16) de la poche de réception (13) est identique avant la toute première utilisation de la plaquette de coupe (10) et après la réduction de la plaquette de coupe (10).
  5. Procédé selon l'une quelconque des revendications 2 à 4,
    caractérisé en ce que la différence entre la hauteur initiale (ha) et la hauteur limite (hg) est d'au moins 0,8 mm.
  6. Procédé selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que le tranchant (11) est réaffûté plusieurs fois avant que la plaquette de coupe (10) ne passe en dessous de la hauteur limite (hg).
  7. Procédé selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que la plaquette de coupe (10) est reliée, avant la toute première utilisation de la plaquette de coupe (10), à la surface d'application (16) de la poche de réception (13) au moyen d'une liaison de matière, notamment au moyen d'une liaison par brasage.
  8. Procédé selon la revendication 7,
    caractérisé en ce que la liaison de matière de la plaquette de coupe (10) avec la surface d'application (16) de la poche de réception (13) est détachée avant que la plaquette de coupe (10) ne soit retirée de la surface d'application (16) de la poche de réception (13).
  9. Procédé selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce que la nouvelle plaquette de coupe (110) est reliée à la surface d'application (16) de la poche de réception (13) au moyen d'une liaison de matière, notamment en brasant la nouvelle plaquette de coupe (110) à la surface d'application (16) lorsque la nouvelle plaquette de coupe (110) est insérée sur la surface d'application (16) dans la poche de réception (13).
  10. Procédé selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que la nouvelle plaquette de coupe (110) présente un nouveau tranchant (111), en ce que la nouvelle plaquette de coupe (110) dépasse par son nouveau tranchant (111) hors de la poche de réception (13) d'une nouvelle hauteur initiale (han) au-dessus du contour extérieur du corps de rotation (20) dans la direction radiale (50).
  11. Procédé selon la revendication 10,
    caractérisé en ce que la nouvelle hauteur initiale (han) de la nouvelle plaquette de coupe (110) est d'au moins 70 %, notamment d'au moins 90 %, de préférence d'au moins 100 % de la hauteur initiale (ha) de la plaquette de coupe (10) avant la toute première utilisation de la plaquette de coupe (10).
  12. Procédé selon la revendication 10 ou 11,
    caractérisé en ce que la nouvelle hauteur initiale (han) de la nouvelle plaquette de coupe (110) est inférieure d'au plus 1,5 mm à la hauteur initiale (ha) de la plaquette de coupe (10) avant la toute première utilisation de la plaquette de coupe (10).
  13. Procédé selon l'une quelconque des revendications 1 à 12,
    caractérisé en ce que la surface d'application (16) de la poche de réception (13) pour la plaquette de coupe (10) comprend une surface d'appui (22), en ce que la surface d'appui (22) se trouve à l'intérieur du contour périphérique du corps de rotation (20), et en ce que la surface d'appui (22) soutient la plaquette de coupe (10) contre les forces de coupe qui se produisent.
  14. Procédé selon la revendication 13,
    caractérisé en ce que la surface d'application (16) est formée exclusivement par la surface d'appui (22).
  15. Procédé selon l'une quelconque des revendications 1 à 14,
    caractérisé en ce que l'outil d'usinage (1) possède plusieurs poches de réception (13) et plusieurs plaquettes de coupe (10), en ce qu'avec le retrait de l'une des plusieurs plaquettes de coupe (10) de la poche de réception (13) associée, toutes les plusieurs plaquettes de coupe (10) sont retirées des poches de réception (13) respectivement associées, et en ce que de nouvelles plaquettes de coupe (110) sont ensuite insérées dans toutes les poches de réception (13) respectivement associées.
EP22214270.5A 2022-12-16 2022-12-16 Procédé de réparation d'un outil de détensionnement Active EP4385694B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22214270.5A EP4385694B1 (fr) 2022-12-16 2022-12-16 Procédé de réparation d'un outil de détensionnement

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Application Number Priority Date Filing Date Title
EP22214270.5A EP4385694B1 (fr) 2022-12-16 2022-12-16 Procédé de réparation d'un outil de détensionnement

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EP4385694A1 EP4385694A1 (fr) 2024-06-19
EP4385694C0 EP4385694C0 (fr) 2025-10-22
EP4385694B1 true EP4385694B1 (fr) 2025-10-22

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB935749A (en) * 1959-06-05 1963-09-04 Ludwig Oppold Rotary cutter
DE1922942U (de) * 1965-06-24 1965-09-02 Johannes Voitl Kreissaegeblatt mit hartmetallzahnen.
US3860051A (en) * 1970-09-24 1975-01-14 I Anson Anson Chipper cutter and holders therefor
US4242927A (en) * 1979-04-23 1981-01-06 Niagara Cutter Inc. Method of making a cutting tool
US6189584B1 (en) * 1998-08-12 2001-02-20 Douglas Scott Cayce Disposable carbide blade assembly for universal rotary cutter
DE19906554C1 (de) * 1999-02-17 2000-02-24 Leitz Geb Gmbh & Co Schneidplatte, insbesondere für ein Fräswerkzeug
EP3354387B1 (fr) 2017-01-25 2024-07-03 Ledermann GmbH & Co. KG Outil d'enlèvement de copeaux
DE102020109739A1 (de) 2020-04-07 2021-10-07 LEITZ GmbH & Co.KG Werkzeug zur spanabhebenden Bearbeitung nicht metallischer Werkstoffe

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EP4385694A1 (fr) 2024-06-19

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