EP3634669A1 - Outil de coupe - Google Patents

Outil de coupe

Info

Publication number
EP3634669A1
EP3634669A1 EP18728371.8A EP18728371A EP3634669A1 EP 3634669 A1 EP3634669 A1 EP 3634669A1 EP 18728371 A EP18728371 A EP 18728371A EP 3634669 A1 EP3634669 A1 EP 3634669A1
Authority
EP
European Patent Office
Prior art keywords
cutting
chip
tool
cutting edge
coolant
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
EP18728371.8A
Other languages
German (de)
English (en)
Inventor
Michael Bopp
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.)
Guehring KG
Original Assignee
Guehring 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 Guehring KG filed Critical Guehring KG
Publication of EP3634669A1 publication Critical patent/EP3634669A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/10—Cutting tools with special provision for cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/28—Features relating to lubricating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D77/00—Reaming tools
    • B23D77/006—Reaming tools with means for lubricating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1007—Arrangements for cooling or lubricating tools or work by submerging the tools or work partially or entirely in a liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/32—Chip breaking or chip evacuation
    • B23B2200/323—Chip breaking or chip evacuation by chip breaking depressions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/32—Chip breaking or chip evacuation
    • B23B2200/328—Details of chip evacuation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/50—Drilling tools comprising cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
    • B23B2270/30—Chip guiding or removal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0002—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2250/00—Compensating adverse effects during milling
    • B23C2250/12—Cooling and lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D2277/00—Reaming tools
    • B23D2277/30—Chip guiding means

Definitions

  • the present invention relates to a cutting tool for the machining and machining of recesses and / or counterbores of a component to be machined, in particular for producing or finishing a plug bore, according to the preamble of claim 1.
  • Generic cutting tools are used in the form of milling drills for the production of holes, such as water stub holes in internal combustion engines. Furthermore, such cutting tools are used in the form of reaming tools for fine machining of holes by rubbing. By the friction process, the surface quality and the dimensional accuracy of holes and recesses or depressions in components to be machined improved.
  • a bore or recess in a component is made in two or more operations.
  • a bore or a recess is first introduced in a component by a twist drill or a milling drill, wherein the front and side surfaces of the bore or recess have a certain roughness.
  • a reamer tool By means of a reamer tool these surfaces are reworked in a second operation to a desired surface quality, typically only a few tenths of a millimeter of material are removed and z.
  • tolerances IT7 to IT5 can be achieved.
  • water plug holes are provided to provide coolant leading recesses in the engine block.
  • one or more stages reaming tools are used, which achieve a high surface quality in the processing of such recesses and drilling surfaces.
  • generic cutting tools have cutting on the circumference and / or at the gate, ie at the head end of the tool on.
  • the cutting edges are usually aligned parallel or vertical to a rotational axis of the cutting tool.
  • Typical diameters of such cutting tools are between 1 mm to 50 mm, the cutting head, which carries the cutting, is usually made of solid carbide (VHM).
  • Diamond cutting has been known for a long time. More recently, a production of cutting made of a crystalline hard material, in particular a synthetically produced crystal cutting material has prevailed, for example, embedded in the blade diamond particles in a metal matrix, or a Bohrnitridschneide is used. Thus, in many cases, diamond cutting, PCD cutting (polycrystalline diamond cutting) or CBN cutting (cubic Bohrnitridde) are used, which are permanently fixed by soldering or welding on the cutting head or by means of suitable fasteners interchangeable attached to the cutting head.
  • a reaming tool which has a chip guiding element with a guide surface for chip guiding, which forms a slot-shaped receiving channel with a rake face of the cutting edge.
  • the chip-guiding element is of cuboid design and has a planar guide surface on, which forms a receiving channel which adjoins the receiving gap with a rake surface adjoining the knife plate at the rear. In this receiving gap, the chips are deflected in the direction of a blade plate adjacent side surface of the chip space and derived.
  • DE 10 2005 034 422 A1 discloses a reamer for machining bores in workpieces which are difficult to machine.
  • the tool comprises at least one knife plate with a cutting edge and at least one guide strip.
  • DE 10 2013 1 14 792 A1 shows a cutting tool in the form of a drill with internal cooling and internal chip removal.
  • the drill shank is cylindrical and has at the front end uniformly distributed diamond blades.
  • a plurality of cooling channels run in the wall of the drill shaft, each channel having a coolant inlet channel and a coolant return channel.
  • the drill stem is connected via an adapter to a machine tool.
  • a single coolant inlet channel and a single coolant return channel is arranged.
  • the adapter is connected to the drill shank via a flange connection.
  • the internal chip removal takes place via the suction channel and via suction openings, which are arranged in a side wall of the adapter.
  • DE 103 05 991 A1 discloses a milling tool with a suction device and a tool head.
  • the suction device is clipped onto the tool body.
  • the extraction takes place via the suction channels, which run helically in the tool shank, as well as via slots, which are connected to the sheaths.
  • the tool head has a central cooling channel which is divided into individual grooves on the front side of the tool shank and thus guided to the individual cutting edges.
  • the cutting tool according to the invention in particular for producing or reworking a plug bore, comprises a clamping shaft and a tool carrier with a cutting head and at least one cutting edge arranged on an axial cutting head end of the tool carrier, wherein the tool carrier comprises a chip receiving space which is shaped, a material chips removed from the cutting edge to record to be machined component.
  • a respective opening into the chip receiving space Spankorridor adjacent which is bounded by a radially extending, partially bounded by the cutting chip gap and, starting therefrom by a first and second, extending in the direction Spanfactraum corridor surface the first corridor surface continues the cutting surface of the cutting edge and the second corridor surface extends widening, and at least in an axial partial section facing the cutting head end is circumferentially bounded and closed by a circumferential wall as a third corridor surface, wherein at least one coolant channel within the peripheral wall is formed, which is provided to carry coolant to the cutting head end th.
  • a cutting tool which has a chip receiving space which is circumferentially completely closed at least in an adjacent to the cutting head end axial portion.
  • the closed chip receiving space causes material chips, which are lifted from a cutting edge of the cutting edge on the component to be machined, are reliably removed from the machined bore. It is virtually impossible that chips that enter the chip receiving space, can get out of this axially forward into the processing area. Furthermore, it is prevented that material chips on the peripheral side of the cutting tool there can come into contact with the already-machined side wall of the bore to be machined. This avoids that the chips of material can get caught on the side wall of the component to be machined and thereby possibly impair the quality of the already processed surface.
  • a chip guiding is arranged in the region of the cutting plate, which defines a Spankorridor opposite the cutting plate.
  • the Spankorridor has a chip gap, can penetrate into the chips.
  • Adjacent to the at least one cutting edge is a respective chip channel opening into the chip receiving space, which extends from a radially extending chip gap partially delimited by the cutting edge and at least from a first and a second corridor surface extending in the direction of the clamping stem and a peripheral wall as a third corridor surface
  • the first corridor surface is defined by a chip flank of the cutting edge and the chip driving surface adjacent to the chip flank.
  • the second corridor surface is shaped to expand the chip corridor towards the clamping shank toward the chip receiving space.
  • Chips are removed from the processing point in the chip receiving space, so that the milling area is free of chips, no chip accumulation occurs and thus a consistent high quality of the friction point is achieved. Increased heat development is prevented and the service life of the cutting or reaming tool is increased.
  • a third corridor surface bounds the chip corridor on the peripheral side of the cutting tool.
  • the closed chip corridor forms a type of nozzle, which dissipates coolant supplied to the cutting edges together with the material chips in the desired direction.
  • the entire cutting head with the chip receiving space and the corridor surfaces is preferably formed in one piece and is preferably made in one piece.
  • the production of such a peripheral-side closed element, which has a chip corridor with specially shaped corridor surfaces on the inside, can be made, for example, by an additive manufacturing process.
  • Such an additive manufacturing method makes it possible to produce arbitrarily inclined corridor surfaces in the interior of the chip receiving space.
  • one or more coolant channels are furthermore formed, via which coolant can be conveyed to the cutting head end or to the cutting edges.
  • the at least one coolant channel is preferably not centric in the region of the tool carrier, d. h not on the axis of rotation of the tool carrier, arranged. This runs in the peripheral wall, ie in the wall of the hollow cylinder, said hollow cylinder can be made variable over the length of the tool carrier.
  • the coolant channel (s) may not only be configured as tubular or capillary channels but may extend circumferentially over a significant angular range, for example, in total by more than a quarter, more than half or even more than three quarters of the 360 ° total angular range , In this way, coolant channels can be created which can have a relatively small extent, for example 2 mm or less, preferably 1 mm or less and in particular even 0.5 mm or less, in the radial direction. As a result, the thickness of the peripheral wall can be kept small, so that the chip receiving space has the largest possible cross section relative to the overall cross section of the cutting head, in order to allow efficient removal of material chips.
  • the cutting tool according to the invention thus has a fluidly favorable chip receiving space, which reliably absorbs and removes even larger material chips.
  • the transport also improves by creating a Spanability- space according to the invention with a large cross-section material chips.
  • the cutting edge can be formed as an exchangeable cutting edge, in particular cutting plate, or firmly connected to the cutting head, in particular soldered, be.
  • the number of cutting can be in particular two, with cutting tools with a larger number of cutting, z. B. three or four, can be realized.
  • the blades may be arranged to cut across the middle or not over the middle.
  • the distance of the chip outlet opening to the end face of the cutting head is advantageously chosen so that it is greater than the maximum depth of the holes to be machined in the workpiece, so that the chips can escape unhindered.
  • the tool carrier is integrally formed.
  • the area comprising the cutting head with the peripheral wall, the chip receiving space and the chip outlet opening is formed in one piece.
  • This complete area consists of a part that can be connected directly to the clamping section, for example. Consequently, this tool carrier can be applied or attached to any clamping section. This can be done for example by an additive manufacturing process, in particular selective laser melting, by applying material to the clamping shaft.
  • Such a cutting tool can be clamped in any machine tool, whereby cutting tools with different diameters, or with a chip receiving space of arbitrary diameter, can be used flexibly.
  • the tool can be mounted in any receptacles of a machine tool, wherein the clamping shaft is formed independently of the diameter of the chip receiving space.
  • a connection area or an additional adapter for removing the chips is not necessary because the chip removal takes place in the region of the one-piece tool shank, which has the chip outlet openings. The chip removal is thus carried out in an area in the length of the tool shank.
  • the one-piece design eliminates the use of fasteners and the presence of connecting joints, which can be a Spanabschreib without leakage or unwanted discharge areas or lost air can be guaranteed. Likewise, the use of seals can be saved, which would be required for additional connection areas with additional connecting means to ensure optimum chip removal without loss.
  • the cutting edges can furthermore be detachably mounted and not formed in one piece together with the tool carrier.
  • At least two chip outlet openings are provided in the peripheral wall at a clamping shaft facing the end of the tool carrier which are preferably arranged opposite each other in the peripheral wall.
  • at least one chip outlet opening is provided in the circumferential wall at an end of the tool carrier facing the clamping shank.
  • the chip outlet opening is formed by a peripheral side portion of the peripheral wall.
  • the chip outlet opening may have the shape of a portion of a cylinder jacket surface.
  • the circumferential geometry of the chip outlet opening can be configured as desired. It is also conceivable that two opposite chip outlet openings are arranged in the circumferential conversion. As a result, a symmetrical with respect to the axis of rotation chip removal can be achieved from the clamping receiving space.
  • the two chip outlet openings are identical.
  • two chip outlet openings are provided, which lie opposite one another and thus ensure efficient removal of chips and / or coolant.
  • the distance between the one or more chip outlet openings to the end face of the cutting head is advantageously chosen so that it is greater than the maximum depth of the holes to be machined in the workpiece, so that the chips can escape unhindered.
  • a chip guide surface which is inclined relative to a longitudinal axis of the cutting tool and which is designed to guide chips and / or coolant outwardly from the interior of the chip receiving chamber.
  • the angle of inclination of the chip surface may be, for example, approximately 45 °.
  • the chip guide surface can also be concavely curved in particular, advantageously increasing the inclination of the chip guide surface with respect to a longitudinal axis of the cutting tool with decreasing distance to the chip discharge opening.
  • a central coolant passage is provided in the clamping shaft and a base portion of the tool carrier, which is connected in a transition region between the base portion and the cutting head with the at least one coolant channel.
  • the central coolant passage leads coolant to the coolant channel or channels and, at least in the region of the clamping shaft, is designed in such a way that it is compatible with a coolant supply of a tool holder in which the clamping shaft can be clamped.
  • the first corridor surface may include at least a portion of a chip receiving surface confined to the cutting edge
  • the second corridor surface comprises a surface of a chip guiding portion which is angled or curved at least in sections towards the clamping stem to expand the chip corrugation from the chip gap toward the chip receiving space.
  • the cutting edge comprises a first cutting edge on the axial cutting head end and a second cutting edge in the region of the peripheral wall of the cutting head, wherein the chip gap extends along the first and the second cutting edge, so that the chip corridor in the region of the second cutting edge to the peripheral wall of the Tool carrier is open.
  • the Spankorridor is not limited in the region of the second cutting edge in the peripheral region. This ensures that even the material chips removed from the second, circumferentially provided cutting edge can reliably enter the chip corrugation and be removed therefrom.
  • the cutting edge has a rake face, which forms a subsection of the first corridor face, the rake face extending substantially flush with the first corridor face.
  • the entire first corridor surface is preferably flat from the cutting edge and extends in particular parallel to the longitudinal axis of the cutting tool.
  • the first corridor surface may also have, for example, a step which assists a chip break.
  • the second corridor surface has at least one coolant outlet facing the cutting edge and connected to the coolant channel.
  • the coolant outlet is advantageously shaped so that at least part of the exiting coolant hits the cutting edge to cool and lubricate it. Furthermore, the escaping coolant supports a trouble-free removal of material chips.
  • the coolant outlet is formed as a groove, which runs in particular parallel to a head cutting edge of the cutting edge.
  • coolant is distributed evenly over the cutting edge.
  • one or both edges of the groove may act as a chip breaking edge.
  • Coolant outlets need not necessarily be arranged only in the second corridor surface, but may alternatively or additionally also be provided at another suitable location.
  • the peripheral wall has an inwardly directed cross-sectional widening in the region of the cutting head end, the at least one coolant channel being in such a way is curved, that also the cross-sectional expansion of coolant is flowed through.
  • cross-sectional widening is meant an arrangement of additional material in the interior of the cutting head, so that the cross-sectional area of the chip receiving space, ie the cavity is reduced. The cross-sectional widening ensures reliable support of the one or more cutting edges and reliable discharge and transfer of cutting forces to rear portions of the cutting tool.
  • the flow through the cross-sectional widening with coolant can be effected, for example, by a meander-shaped guidance of the coolant channel (s), wherein in particular one or more subsections of the coolant channels cause a reversal of the flow direction of the coolant.
  • the tool carrier is produced by means of an additive manufacturing process, in particular by means of selective laser melting by applying material to the clamping shaft.
  • the invention furthermore relates to a production method for a cutting tool according to the invention.
  • the tool carrier is produced by means of an additive manufacturing method, in particular selective laser melting, by applying material to the clamping shaft.
  • additive manufacturing methods are particularly suitable for creating the sometimes complex structures of the tool carrier with manageable cost and production costs.
  • the non-detachable connection between the tool head or cutting head and clamping shaft is also in the course of additive manufacturing.
  • this base section can likewise be produced by the additive manufacturing method.
  • a base portion having a central coolant channel wherein the tool carrier is made by means of an additive manufacturing process, in particular selective laser melting, by applying material to the base portion.
  • the base section can be designed as described above and have the same advantages.
  • FIG. 1 shows a side view of an embodiment of a cutting tool according to the invention
  • Figures 2 and 3 are sectional views of the cutting tool of Fig. 1 and;
  • FIG. 4 shows a perspective view of a further embodiment of a cutting tool according to the invention.
  • Fig. 5 is an end view of the embodiment of Fig. 4; 6 and 7 are sectional views of the embodiment of FIG .. 4
  • Fig. 1 to 3 show an embodiment of a cutting tool 10, which can be used for example as a milling drill or reamer, in particular as a water stopper drill.
  • the cutting tool 10 is rotatably moved in a working direction of rotation 52 for machining a component. It includes a tool carrier 12 and a clamping shaft 14 which can be clamped in a drill shank of a work machine.
  • the clamping shaft 14 may in particular be designed as a hollow shaft taper for a hollow shaft taper receptacle (HSK receptacle).
  • the tool carrier 12 comprises a cutting head 22 which comprises a central chip receiving space 26 and a cutting region 28 at the cutting head end 24. This area is formed in one piece.
  • Each cutting edge 18 has a side cutting edge 42 for cutting or rubbing a bore peripheral surface, a head cutting edge 40 for cutting or reaming a gate, and a bevel cutting edge 38 inclined at an angle of about 45 ° for cutting or rubbing a chamfer of a component.
  • the cutting head 22 merges at its end opposite the cutting head end 24 into a cross-sectionally enlarged base section 16, which is connected to the clamping shaft 14.
  • the cutting head can be manufactured directly on this base section via an additive manufacturing method, wherein a non-detachable connection between the base section and the cutting head is also effected by this additive manufacturing method.
  • the base portion itself can be manufactured by the additive manufacturing method and by the same manufacturing step as the cutting head or the tool carrier.
  • the at least sectionally cylindrical chip receiving space 26 is delimited by a peripheral wall 66, which in an area adjoining the base section 16 has two chip discharge openings 54 lying opposite one another, which allow material chips and coolant to escape from the chip receiving space 26.
  • respective inclined chip guiding surfaces 58 are provided, which form a kind of wedge and the material chips or the coolant in the direction of the chip outlet openings 54 conduct.
  • two coolant channels 64 which are connected to a central coolant passage 60 provided in the clamping shaft 14 and the base section 16, are formed in the interior of the circumferential wall 66.
  • the coolant channels 64 may extend sectorwise over the circumference, so that the inner and the outer wall of the peripheral wall 66 are connected there only via two relatively narrow webs.
  • the cutting area 28 comprises an area in which the head cutting edges 40 process the gate bottom of a recess and a peripheral area in which the side cutting edges 42 process a wall surface of the recess.
  • the bevel cutting edges 38 accordingly process a chamfer surface of the depression.
  • Chips removed by the cutting edges 38, 40, 42 can each enter through a chip gap 44 into a respective funnel-like chip corridor 50 formed in the interior of the cutting head 22.
  • Each chip corridor 50 is delimited by a first corridor surface 46 and a second corridor surface 48 and widens in its cross section in the direction of the clamping shaft 14.
  • the chip passages 50 open into the chip receiving space 26 so that chips pass through the chip passages 50 into the chip receiving space 26 can be transported.
  • the rake surface 30 of the cutting edge 18 together with the chip driving surface 32 forms the first corridor surface 46.
  • a chip guiding section 56 Opposite the first corridor surface 46 or chip driving surface 32 is a chip guiding section 56, which partially forms an inner surface of the chip Peripheral wall 66 and partially comprises a second corridor surface 48 which is inclined relative to the first corridor surface 46, so that the cross-section of the Spankorridors 50 viewed in the direction clamping shaft 14 extends.
  • the Cutting head 22 In the region of the Spankorridors or Spanmit Vietnamese design 32 has the Cutting head 22 an inwardly directed cross-sectional widening 68, which serves to attach the cutting edges 18 and the derivative of the occurring cutting forces.
  • the coolant channels 64 are guided in meandering fashion in order to ensure sufficient cooling of the cutting head end 24 and to introduce the coolant to coolant outlets 62, 63.
  • the coolant channels 64 open via branch channels, shown only in sections, on the one hand into a central coolant outlet 63 provided on the end face of the cutting head 24 and on the other hand into respective coolant outlets 62 facing a respective blade 18 in the second corridor surface 48, which extend as parallel to the head cutting edge 40 Grooves can be formed.
  • a coolant flow is introduced, which serves to lubricate and cool the cutting edges 38, 40, 42 and at the same time supports the removal of the chips.
  • the completely closed shape of the chip passages 50 and of the chip receiving space 26 adjoining them in this case improves the flow course of the coolant chip mixture and prevents chips from snagging on the circumference or coolant from leaking out of the chip receiving chamber 26 or the chip passages.
  • the longitudinal edges of the coolant outlets 62 which run parallel to the head cutting edges 40, also act as chip breaking edges, which can take or break chips, in order to mold them as small as possible and transport them through the chip pass 50 into the rear chip receiving space 26.
  • FIGS. 4 to 7 show a further embodiment of a cutting tool 10.
  • the cutting tool 10 is moved rotationally in a working direction of rotation 52 for machining a component. It comprises a tool carrier 12 and a clamping shaft 14, which can be clamped in a drill shaft of a working machine.
  • the clamping shaft 14 can be designed in particular as a hollow shaft taper receptacle (HSK receptacle).
  • the tool carrier 12 comprises a cutting head 22, which comprises two chip receiving chambers 26 and a cutting region 28 at the cutting head end 24. At the cutting head end 24 two blades 18 are screwed, each having a blade carrier. Each insert 18 has a side cutting edge 42 for rubbing a bore peripheral surface and a head cutting edge 40 for rubbing a gate of a component.
  • Each chip receiving space 26 is defined in each case by a plane Spanmitrium constitutional unit 32 and a perpendicular thereto angled chip guide portion 56, wherein the chip guide surface 58 is concavely curved in the direction of the clamping shaft 14 to be able to remove taken chips outside the processing area.
  • the cutting region 28 comprises a region in which the head cutting edges 40 rub against the gullet bottom of a depression and a peripheral region in which the lateral cutting edges 42 rub a wall surface of a bore or recess. Chips removed by the cutting edges 40, 42 can each enter through a chip gap 44 into a respective channel-like chip corridor 50 formed in the interior of the cutting head 22.
  • Each chip corridor 50 is delimited by a first corridor surface 46 and a second corridor surface 48 (both not visible in this illustration) and a third corridor surface n shape of the peripheral wall 66 and widens in its cross-section towards the clamping shaft 14.
  • the chip corridor 50 opens into the chip receiving space 26, so that chips through the Spankorridor 50 can be transported through in the chip receiving space 26.
  • a clamping guide section 56 of the tool carrier 12 which extends from the cutting head end 24 in the direction of the clamping shaft 14 has the shape of a quarter section of a circular cylinder, the first quarter surface thereof being cut, and the second quarter surface extending in extension of the chip guiding section 56.
  • the chip guide surface 30 forms the first corridor surface 46 together with a section of the chip receiving surface 32.
  • the cut first quarter surface of the chip guide section 56 runs opposite the first corridor surface 46 and forms the second corridor surface 48, the second one Corridor surface 48 is inclined relative to the first corridor surface 46 and has a concave curvature, so that the cross-section of the Spankorridors 50 viewed in the direction clamping shaft 14 extends.
  • the well-visible peripheral wall 66 (cut away in the illustration of FIG. 7) directly adjoins the first and second corridor surfaces 46, 48 and circumferentially bounds the chip corridor 50 over most of its length, i. between the chip gap 44 and the chip receiving space 26.
  • the chip gap 44 extends along the cutting edges 40, 42, so that the chip corridor 50 in the region of the side cutting edge 42 to the peripheral side 66 of the tool carrier 12 is open.
  • Respective transitions between the corridor surfaces 46, 48, 54, 58 may be formed in the shape of a ridge or continuously, ie rounded or merging into one another.
  • the cutting tool 10 has a coolant channel 64 designed as a central axial bore, which extends through the clamping shaft 14 and the tool carrier 12.
  • the coolant channel 64 opens via not shown Verze Trentskanäle on the one hand in a central, frontal on the side of the cutting head end 24 provided coolant outlet 63 and the other in a respective provided in the second corridor surface 48, the cutting plate 18 facing the coolant outlet 62, which is formed as parallel to the head cutting edge 40 groove.
  • Through thedeffenaus- outlets 62, 63 a coolant flow is introduced, which serves to lubricate and cool the cutting edges 40, 42 and at the same time supports the removal of the chips.
  • the closed shape of the chip pass 50 improves the flow course of the coolant-chip mixture and prevents chips from snagging on the circumference, or coolant exits the chip pass 50 on the circumference.
  • the parallel to the head cutting edges 40 extending longitudinal edges of the coolant outlets 62 also act as Spanbrechkanten that can take chips or break, in order to form them as small as possible and transported through the Spankorridor 50 in the rear Spanability- space 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Drilling Tools (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)

Abstract

L'invention concerne un outil de coupe, en particulier pour la fabrication ou la finition d'un orifice à bouchon, comprenant au moins une arête de coupe disposée sur une extrémité axiale de la tête de coupe d'un porte-outil. Le porte-outil comprend un espace de réception des copeaux qui est formé pour retenir les copeaux de matière enlevés d'une pièce à usiner par le tranchant. Selon l'invention, l'au moins un tranchant est adjacent à un couloir de copeaux respectif qui débouche dans l'espace de réception des copeaux, et qui est délimité par une fente pour copeaux radiale délimitée partiellement par le tranchant et à partir de laquelle une première et une deuxième surface de couloir s'étendent en direction de l'espace de réception des copeaux, la première surface de couloir prolongeant la surface de coupe du tranchant et la deuxième surface de couloir s'étendant inclinée pour s'élargir et étant délimitée et fermée par une paroi circonférentielle en tant que troisième surface de couloir au moins dans une section partielle axiale tournée vers l'extrémité de tête de coupe, au moins un canal de refroidissement étant formé dans la paroi circonférentielle, lequel canal est prévu pour conduire un agent réfrigérant à l'extrémité de tête de coupe.
EP18728371.8A 2017-06-08 2018-05-30 Outil de coupe Pending EP3634669A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017112696.1A DE102017112696A1 (de) 2017-06-08 2017-06-08 Schneidwerkzeug
PCT/EP2018/064252 WO2018224378A1 (fr) 2017-06-08 2018-05-30 Outil de coupe

Publications (1)

Publication Number Publication Date
EP3634669A1 true EP3634669A1 (fr) 2020-04-15

Family

ID=62486586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18728371.8A Pending EP3634669A1 (fr) 2017-06-08 2018-05-30 Outil de coupe

Country Status (7)

Country Link
US (1) US11541460B2 (fr)
EP (1) EP3634669A1 (fr)
JP (1) JP6990257B2 (fr)
KR (1) KR102226631B1 (fr)
CN (1) CN110709200B (fr)
DE (1) DE102017112696A1 (fr)
WO (1) WO2018224378A1 (fr)

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EP3533545A1 (fr) * 2018-03-01 2019-09-04 AB Sandvik Coromant Corps d'outil de coupe modulaire et procede pour fabriquer celui-ci
TWI762161B (zh) * 2021-01-21 2022-04-21 正河源股份有限公司 鑽床倒角刀具
WO2023127352A1 (fr) * 2021-12-28 2023-07-06 株式会社プロテリアル Dispositif de coupe, support et procédé de coupe
CN114571280B (zh) * 2022-02-28 2023-02-07 衢州学院 一种数控机床用防高温溅射的防护装置及其使用方法

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Publication number Publication date
JP6990257B2 (ja) 2022-01-12
KR20200003916A (ko) 2020-01-10
WO2018224378A1 (fr) 2018-12-13
US20200108448A1 (en) 2020-04-09
CN110709200A (zh) 2020-01-17
DE102017112696A1 (de) 2018-12-13
JP2020521646A (ja) 2020-07-27
KR102226631B1 (ko) 2021-03-11
CN110709200B (zh) 2021-04-02
US11541460B2 (en) 2023-01-03

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