Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
  • B22F3/12—Both compacting and sintering
• • 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
  • B23B27/06—Profile cutting tools, i.e. forming-tools
  • B23B27/065—Thread-turning tools
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
  • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
  • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
  • C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
  • B23B2222/28—Details of hard metal, i.e. cemented carbide
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2226/00—Materials of tools or workpieces not comprising a metal
  • B23B2226/12—Boron nitride
  • B23B2226/125—Boron nitride cubic [CBN]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2226/00—Materials of tools or workpieces not comprising a metal
  • B23B2226/31—Diamond

Definitions

• the invention relates to a method for producing a cutting insert for machining metal workpieces according to the preamble of claim 1, also a cutting insert blank according to the preamble of claim 6 and a cutting insert according to the preamble of claim 9.
• Cutting plates for machining metallic workpieces and methods for their production are known.
• the wear-resistant S chicht comprises crystals of diamond (polycrystalline slide ant / PCD) and / or cubic boron nitride (CBN).
• This layer is applied to the base layer, which is preferably made of hard metal, and then in a sintering process is connected practically permanently to the metallic carrier.
• the powder layers is here ⁇ sprochenen type at 1500 ° C and at 50 to 60 kbar connect to the cemented carbide substrate to.
• a side surface of the metal plate provided with the wear-resistant layer is then ground to produce a cutting edge.
• a corresponding number of side faces are subjected to a grinding process.
• the coated metal plate is either produced directly in the form that the later cutting plate is to have.
• a method which comprises the steps mentioned in claim 1.
• the process is characterized in that in a first process step an insert blank is produced which does not yet have its final shape. It is particularly in the area where the finished insert one or more cutting edges are not yet specifically designed.
• a later second process section which is adapted to a specific application.
• an initially rectangular end region of the insert blank is triangular or provided with a tip in order to be able to implement a thread turning tool.
• the shaping of the area of the insert blank provided for the machining can take place in any suitable manner. Only then is the cutting plate blank processed in this way ground in the area of the later cutting edges.
• the insert blank is not yet suitable for use in the machining of metallic workpieces.
• insert blanks of the type mentioned here are produced in large numbers and without further specification an intermediate bearings can be supplied.
• any blanks can be picked from the stock of non-specific cutting plate blanks, which are then brought into the desired shape in the final processing and provided with at least one cutting edge by means of a grinding process.
• An embodiment of the method is preferred, which is characterized in that the cutting insert blank is brought into its desired shape by a grinding process in the area in which the at least one cutting edge is to lie.
• the processing of this area can be carried out in such a way that the grinding of the side surfaces thus created can be carried out directly on the shape in order to produce at least one cutting edge. It is thus possible to combine the additional second process section with the grinding process for producing a cutting edge and to minimize the processing time required for producing the cutting insert.
• a blank insert which has the features mentioned in claim 6 and which is characterized in that it initially has an unspecific shape. It is therefore not tailored to a specific machining method or designed for special tools. The storage of such a non-specific blank does not require any special organizational structure and is therefore easy and inexpensive to implement.
• Figure 1 shows a cutting plate in plan view
• Figure 2 is a front view of the insert according to Figure 1 and
• Figure 3 is a side view of the insert shown in Figure 1.
• FIG. 1 shows a top view of a cutting insert 1 which has an essentially rectangular basic shape.
• One of the long sides, here the upper long side 3, is provided with elevations 5 and depressions 7, both of which are here, for example, essentially triangular and serve to provide a toothing which enables the cutting plate 1 to be securely anchored in a tool.
• elevations 5 and depressions 7 By the provided here Similar design of the elevations 5 and depressions 7 over the course of the long side 3, it is possible to clamp the insert 1 in different positions in one tool and thus to ensure that the insert is reworked. So if the insert becomes blunt, it can be reworked so that it is re-clamped in the tool and can therefore continue to be used.
• the cutting insert 1 is made from a cutting insert blank 9 which essentially has the outer contour of the cutting insert 1, but which is initially of essentially rectangular shape in the region 11 in which the cutting edges 13 and 15 of the cutting insert 1 lie. This is illustrated in FIG. 1 by a dashed line.
• the cutting edges 13 and 15 are arranged symmetrically to an imaginary center line 17 in the region 11 and, for example, enclose an angle of approximately 30 ° therewith.
• a dotted line 19 indicates that a continuous cutting edge 13 'extending over the entire height h of the cutting plate 1 can also be provided, which here includes an angle of approximately 40 ° with the center line 17 purely by way of example.
• this cutting edge 13 ' also runs in mirror image to the center line 17. From the explanations given here it is readily apparent that an essentially rectangular region 11 of a cutting plate blank 9 can be machined in such a way that cutting edges matched to special machining methods are realized.
• FIG. 2 shows a front view of the cutting insert 1, that is to say a view of the region 11.
• the cutting plate 1 has a metallic base support, here a metal plate 21, preferably hard metal plate, onto which a hard material layer, namely a powder layer 23, is sintered practically inseparably, which comprises crystals of diamond and / or of cubic boron nitride or the like .
• This layer is particularly hard, wear-resistant and resistant and is shown in dotted lines for clarity.
• a bevel 27 is provided on the underside 25 opposite the powder layer 23, which serves for the defined contact of the cutting insert 1 with a tool.
• the side surface 29 lying at the bottom in FIG. 2 is inclined with respect to an imaginary center plane E. It falls here from the surface 31 of the powder layer 23 to the central plane E at an acute angle of, for example, 6 °.
• the top side flat 33 which corresponds to the long side 3 (FIG. 1), runs parallel to the central plane E.
• the front side surfaces 35 and 37 lying in the region 11 can be seen, which are subjected to a grinding process in order to produce the cutting edges 13 and 15.
• the illustration according to FIG. 2 shows that the front side surfaces 35 and 37 intersect in the region of the central plane E, that is to say they are symmetrical.
• FIG. 3 shows the longitudinal side 3 of the side plate 1 lying on top in FIG. 1. Elements of the cutting plate 1 addressed in FIGS. 1 and 2 are provided with the same reference numbers here, so that reference is made to the description of FIGS. 1 and 2.
• FIG. 3 clearly shows that the longitudinal side 3 is provided with elevations 5 and depressions 7 which extend over the entire thickness d of the cutting insert 1 and run essentially parallel to the rear side 39 of the cutting insert 1.
• the insert 1 comprises a base support 21 and a powder layer 23 —also shown here in dotted lines.
• Dashed lines also indicate that parts of a cutting plate blank 9 have been removed in the area 11 of the cutting plate 1 in order to form cutting edges in this area.
• the method for producing a cutting insert 1, which is used for machining metal workpieces, is discussed.
• a powder layer comprising crystals of diamond and / or cubic boron nitride or the like is applied to a base support 21, namely to a metal plate, preferably a hard metal plate.
• the powder layer is sintered onto the base support 21 in a sintering process, for example at temperatures of 1500 ° C. and at a pressure of 50 to 60 kbar, an indissoluble connection being produced.
• the coated metal plate can have the shape of the cutting plate blank 9 mentioned in FIGS. 1 and 3. However, it is also possible to cut or cut cutting plate blanks 9 of the type mentioned here from a larger coated metal plate.
• the cutting process can be carried out by an erosion process, preferably by a wire erosion process.
• the elevations 5 and depressions 7 can already be provided in the region of the long side 3.
• the area 11 of the insert blank is non-specific, that is, it is not specifically tailored to the later use of the insert 1. In the exemplary embodiment of a cutting insert blank 9 shown here, hen that this is substantially rectangular in area 11.
• a cutting insert blank 9 of this type can be stored without any special effort, since it is not assigned to special tools.
• the area 11 of the insert blank 9 can be brought into a specific shape, so that the insert can be used as a chisel, turning tool for right or left rotation, threading insert (see FIG. 1) or also for a drill and / or for a reamer .
• the area 11 of the insert blank 9 can be brought into the desired shape in a cutting and / or grinding process. In this way, side surfaces can be formed, at least one of which can then be subjected to a grinding process in order to produce at least one cutting edge.
• the insert 1 can be used generally, since virtually any desired cutting edge geometry can be realized in the region 11 of an insert blank 9.
• the blank 9 can be generally designed so that it can be used in any tools and for different machining methods.
• the elevations 5 and depressions 7 shown in FIG. 1 can also be provided on other surfaces of the cutting plate 1.
• such configurations can also be dispensed with entirely in order to ensure the general use of the insert blank 9.
• the insert 1 can be clamped directly into a tool. It is also possible to do this on one Solder the basic holder and then clamp it in a tool.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Drilling Tools (AREA)
• Powder Metallurgy (AREA)

Priority Applications (11)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7872977

Family Applications (1)

Country Status (18)

Families Citing this family (4)

Citations (3)

• 1998
  • 1998-07-04 DE DE19829924A patent/DE19829924B4/de not_active Expired - Fee Related
• 1999
  • 1999-07-02 SK SK4-2001A patent/SK42001A3/sk unknown
  • 1999-07-02 TR TR2000/03805T patent/TR200003805T2/xx unknown
  • 1999-07-02 JP JP2000557938A patent/JP2002519207A/ja active Pending
  • 1999-07-02 HU HU0103594A patent/HU222000B1/hu not_active IP Right Cessation
  • 1999-07-02 CA CA002336843A patent/CA2336843A1/en not_active Abandoned
  • 1999-07-02 PL PL99345188A patent/PL345188A1/xx unknown
  • 1999-07-02 BR BR9911816-5A patent/BR9911816A/pt not_active Application Discontinuation
  • 1999-07-02 WO PCT/EP1999/004608 patent/WO2000001508A1/de not_active Application Discontinuation
  • 1999-07-02 AU AU47813/99A patent/AU4781399A/en not_active Abandoned
  • 1999-07-02 CZ CZ200127A patent/CZ200127A3/cs unknown
  • 1999-07-02 EP EP99931243A patent/EP1109648A1/de not_active Withdrawn
  • 1999-07-02 KR KR1020017000046A patent/KR20010088781A/ko not_active Application Discontinuation
  • 1999-07-02 CN CN99808227A patent/CN1308568A/zh active Pending
  • 1999-07-02 IL IL14054899A patent/IL140548A0/xx unknown
  • 1999-07-02 YU YU83700A patent/YU83700A/sh unknown
• 2001
  • 2001-01-02 ZA ZA200100059A patent/ZA200100059B/en unknown
  • 2001-01-02 NO NO20010010A patent/NO20010010D0/no not_active Application Discontinuation

Patent Citations (3)

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