Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B51/00—Tools for drilling machines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B51/00—Tools for drilling machines
  • B23B51/02—Twist drills
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2251/00—Details of tools for drilling machines
  • B23B2251/08—Side or plan views of cutting edges
  • B23B2251/085—Discontinuous or interrupted cutting edges
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2251/00—Details of tools for drilling machines
  • B23B2251/56—Guiding pads
• • 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
  • B23B51/063—Deep hole drills, e.g. ejector drills
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S408/00—Cutting by use of rotating axially moving tool
  • Y10S408/713—Tool having detachable cutting edge
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T408/00—Cutting by use of rotating axially moving tool
  • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
  • Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T408/00—Cutting by use of rotating axially moving tool
  • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
  • Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
  • Y10T408/455—Conducting channel extending to end of Tool
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T408/00—Cutting by use of rotating axially moving tool
  • Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
  • Y10T408/557—Frictionally engaging sides of opening in work
  • Y10T408/558—Opening coaxial with Tool
  • Y10T408/5583—Engaging sides of opening being enlarged by Tool
  • Y10T408/5586—Engaging surface subsequent to tool-action on that surface
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T408/00—Cutting by use of rotating axially moving tool
  • Y10T408/89—Tool or Tool with support
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T408/00—Cutting by use of rotating axially moving tool
  • Y10T408/89—Tool or Tool with support
  • Y10T408/909—Having peripherally spaced cutting edges

Definitions

• the invention relates to a deep hole drill with a cutter holder, an interchangeable cutting insert and at least one interchangeable guide bar, the cutter holder being used for a predetermined nominal diameter range, and to an assortment for equipping a cutter holder for such deep hole drills, a new assembly method being able to be carried out with this assortment.
• the chips are removed by means of a supplied lubricant via the flute flute which is relatively large due to the single-lip geometry.
• the actual cutting process takes place via a cutting edge of the drill, which can be located, for example, on a cutting plate or a cutting insert which is screwed onto the cutter holder.
• the tool is supported over its circumference by corresponding guide strips in the borehole during the drilling process.
• Deep hole drills with such interchangeable cutting inserts / guide strips are characterized by their high cost-effectiveness and good cutting performance. Because if the cutting edges or the guide strips wear, it is not necessary to purchase an expensive overall tool, but only the relatively inexpensive cutting insert or the guide strip. In addition, the cutter holder can not only be used for a nominal diameter, but within an entire nominal diameter range.
• This drilling tool is with one with one Adapter sleeve soldered drill shank and an attached drill head.
• the drill head has corresponding seats with threaded holes for a cutting insert and for two guide strips, via which the cutting insert and the two guide strips can be screwed onto the drilling head.
• the adjustment of the position of the cutting edge ie the setting of the exact nominal diameter within the nominal diameter range, for. the deep hole drill is provided via an interchangeable setting plate, which forms a stop for the cutting plate.
• the stop is located on the side of the exchangeable insert opposite the secondary cutting edge, i.e. before the exchangeable insert is attached to the drill head, an adjustment plate suitable for the desired nominal diameter is screwed to the drill head parallel to the longitudinal axis of the tool, so that the exchangeable insert with its opposite side of the secondary cutting edge Side rests on the adjustment plate.
• the thickness of the adjustment plate used thus determines the position of the minor cutting edge and thus the nominal diameter of the
• Drilling For a presetting of the contact surface of the adjusting tool at the corresponding back next to the adjusting itself nor an adjustment wedge is provided which is inserted in an ending on the rear side of the adjusting bore and mi 't of a screw can be fixed. To set the position of the cutting edge to the desired nominal diameter, or to equip the cutter holder with the components provided for the corresponding nominal diameter, several time-consuming operations are therefore necessary.
• a position adjustment of the guide strips is not provided.
• the same guide strips are used for the entire nominal diameter range. This means that the drill cannot be guided precisely. It is therefore an object of the invention to provide a deep hole drill with a cutter holder that can be used for several nominal diameters in a nominal diameter range, as well as an interchangeable cutting insert and at least one interchangeable guide bar, which has a simple structure and allows the tool to be easily and quickly adjusted to the desired nominal diameter , Another object is to provide a kit assortment for equipping a cutter holder for deep hole drilling tools, with which a novel cutter holder assembly method can be carried out by providing a suitable selection of assemblies.
• the novel assembly method which is an independent invention, is characterized as follows: the method allows a nominal diameter-appropriate assembly within a nominal diameter range ( ⁇ ND) universal insert holder (1) of a deep hole drill, such as of a drill, in particular according to one of claims 1 to 12, with a kit consisting of an interchangeable cutting insert (2) and at least one interchangeable guide bar (3, 30), provided for a certain nominal diameter.
• ⁇ ND nominal diameter range
• the process is characterized by the following steps:
• kits are assigned to the cutter holder, which is used in a specific nominal diameter range.
• a kit consisting of a cutting insert and at least one corresponding guide bar is available for each desired nominal diameter.
• Cutting inserts and guide strips have counter-stop faces, by means of which they can be fixed in the position specified by the stops by means of fixed, universally suitable stops on the cutter carrier. According to the invention, only the kit corresponding to a desired nominal diameter has to be selected from an assortment of kits and fixed to the cutter holder by means of the fixed stops there.
• the number of parts in the deep hole drill according to the invention is also one in comparison to corresponding known tools Increased stability and strength of the cutter holder is achieved because the cutter holder is not weakened by additional recesses and threaded holes for adjusting plates etc., but rather fills the specified space as completely as possible.
• the deep hole drill according to the invention is already suitable for diameter values from 16 mm up to approx. 40 mm, which are very small compared to the nominal diameters that can be achieved with conventional tools (botek: from 18 mm upwards). Tests have shown that good results can be achieved with ratios of drilling depth to diameter of 10: 1 to 80: 1 with a total tool length of up to 3000 mm.
• the cutting insert is advantageously screwed to the cutter holder.
• a threaded bore is provided on the cutting insert seat on the cutting support, but a through hole is provided on the cutting inserts, so that the cutting inserts can be screwed onto the cutting support.
• the distance between the through hole and the counter-stop surfaces is the same for all cutting inserts, i.e. all cutting inserts "fit to the geometry predefined by the universal cutting holder.
• the threaded hole on the cutting insert seat has an offset to a through hole on the cutting insert, so that the
• Cutting insert is pressed against the stop when the cutting insert is screwed onto the cutting insert seat.
• the offset is very small (in the order of magnitude of 1/100 mm), so that there is no deformation of the cutting insert or of the cutting support, but only a fixation of the position of the cutting insert at the predetermined stop via the (elastic) deformation the screw.
• the assembly of the cutter holder with the cutting insert is further simplified in this way.
• other fastening options would also be conceivable as fastening the cutting insert or the guide strip, for example a guide groove on the cutting support, into which a T-shaped wedge formed on the cutting insert is inserted.
• the guide strips also advantageously each have a through hole in order to be screwed into corresponding threaded holes on the cutter holder.
• the guide rails, which are inserted in corresponding grooves on the cutter carrier are thereby screwed on -ver Credde in the radial direction through bore into threaded holes' on the cutter carrier.
• the through hole extends in each case between a support or outer circumferential surface and the counter abutment surface of the guide bar.
• the distance of the through hole from the cutting edge increases from one cutting insert to the next larger by the same amount as the distance from the support surface and the counter-abutment surface of the associated guide bar to the next larger guide bar. This ensures good support of the secondary cutting edge in the bore in the entire diameter range by the guide bar (s).
• the increase can be linear in the entire diameter range or follow any other pattern, for example a similarity series.
• Interchangeable inserts which are exchanged after their cutting edge has worn, have proven to be particularly suitable as a cutting insert. Errors that could result from turning an indexable insert that already has a minor cutting edge or guide chamfer are avoided from the outset.
• precise (one-way) interchangeable inserts and guide strips which are manufactured separately for each nominal diameter, offers compared to the use of identical inserts for several nominal diameters, which are set to the desired nominal diameter via an adjusting disc, and standard guide strips, which do not allow adjustment to the nominal diameter , many advantages:
• a suitable kit (removable plate and guide rail (s)) must be provided for every nominal diameter.
• the nominal diameter can be set simply by selecting the appropriate kit. Because the iterative wash with indexable insert, setting plate, remeasurement, etc. is not necessary. The setting of the nominal diameter is thus outsourced from the assembly process to an upstream manufacturing process for the exchangeable plates and the guide rails, specifically for each nominal diameter, which takes place under defined conditions and automatically, so that, in addition to easier assembly of the deep hole drill, overall higher precision when setting the nominal diameter can be achieved.
• the deep hole drill is advantageously designed as a single-cutter or single-lip deep hole drill with internal cooling.
• the invention is not limited to single-lip tools.
• two-lip designs would also be conceivable, in which a further interchangeable plate is provided per kit, for example instead of a guide bar.
• Three-knife trimmers with three removable plates per kit would also be conceivable.
• hard metal cutting inserts and guide strips ensures a particularly high wear resistance of the kits for the deep hole drill according to the invention.
• the cutting insert and guide bar have a hard material coating.
• a combination, i.e. hard or soft-coated carbide cutting inserts and guide strips, would also be conceivable, as would ceramic cutting inserts and guide strips.
• Hard metals consist of metallic hard materials, which due to their high hardness can be described as relatively brittle, and binders or binding metals mainly of the iron group (iron, cobalt, zinc), which are relatively soft and tough and with which the hard materials are sintered together. Mixtures of ceramics and metals (cermets) are also included in the hard metals.
• the high hardness and thus wear resistance of the metallic hard material is also reflected the toughness of a binder metal.
• the desired properties of the drill shaft can be set precisely.
• diamond, cubic boron nitride, corundum, sialons or other non-metallic materials are also suitable as coating materials.
• Tempered steel has proven to be an advantageous material for the cutter holder, particularly with regard to toughness and torsional rigidity, i.e. on the transferable torque. It would also be conceivable to use an insert holder equipped with interchangeable inserts, which itself consists of HSS or hard metal.
• the cutter carrier is a drill head which is integrally connected to the drill shaft, for example brazed to the drill shaft.
• the higher-loaded drill head can then be made from a more expensive material and with a more complex geometry, in particular the internal cooling channel or channels, while the lower-loaded drill shaft consists of cheaper and easier-to-machine material and its simpler geometry is obtained in its own manufacturing process.
• the internal cooling channel has, for example, one or two circular cross sections at the drill tip, while a circular through-hole is made on the drill shaft.
• the drill shaft consists of a formed tube made of tempered steel. The straight flute can be pressed into the tube in an easy-to-control and quick pressing or rolling processing step, and at the same time a favorable shape for the internal cooling channel can be achieved.
• Figure 1 is an exploded perspective view of an embodiment of the deep hole drill according to the invention.
• FIG. 2 is a plan view of the drill tip of the in FIG.
• FIG. 3 shows a plan view of the drill tip of a modified embodiment
• Fig. 4 is a detailed view of the built-in indexable insert of the deep hole drill of Fig. 1;
• Fig. 5 is a detail view of the built-indexable insert of a modified embodiment, •
• FIG. 7 shows the kits assigned to the nominal diameters of FIG. 4.
• Figs. 1 and 2 which shows a single-lip embodiment of the deep hole drill according to the invention.
• the reference numeral 1 denotes a drill head that is soldered to a drill shaft 15, which in turn is soldered into an adapter sleeve 16.
• the flute is essentially V-shaped, the angle spanned by the chip and chip-free surface approximately corresponding to 90 °.
• the drill head has a recess at its tip on the rake face of the flute 13, which forms a seat for an interchangeable insert 2 with its rear face 5 and the two side faces 10, 14.
• a central threaded bore 7 is drilled into the rear surface 5 and receives a screw 6 which is guided through a through bore in the interchangeable insert 2.
• the interchangeable insert 2 like the guide strips 3 ', has a through hole 8 which, when installed with a corresponding threaded bore 7, is aligned with a minimal offset, so that the interchangeable insert 2 and the guide strips 3 ' are screwed together quickly with a single screw 6 is possible.
• the fixed stop for the guide strips each consists of the rear surface 9 of the guide strip seat on the drill head, while the width the guide rails are the same for all nominal diameters.
• the guide strips of the kits for different nominal diameters thus differ only in their radial thickness, ie the distance between the outer circumferential surface and counter-stop surface 109, which is predetermined by the respective nominal diameter of the tool.
• FIG. 4 shows an enlarged top view of the installed interchangeable insert 2.
• the through bore 8 - drawn with a solid line - and the threaded bore 7 - drawn with a broken line - are at a small offset from one another, which, when the interchangeable insert 2 is screwed on, results in the plate 2 with its counter-stop side face 110 is pushed against the stop side surface 10 of the insert seat.
• this offset is clearly oversized here.
• the plate 2 strikes with its second, counter-stop side surface 114 running orthogonally to a point located on the second stop side surface 14 of the insert seat and is thus determined by the surfaces 5, 10, 14 in all three coordinate directions.
• Fig. 4 it can also be seen that the two stop side surfaces 10, 14 at an angle ⁇ of 80 ° are inclined towards each other, while the two counter stop surfaces 110, 114 span an angle ⁇ of 90 °.
• the cutting plate 2 preferably lies with the entire counter-stop side 110 against the stop surface 10.
• a linear stop would also be conceivable, as is shown by an inclined stop surface 10 'with a broken line.
• the angular shape of the stop ensures that there is no insufficient tolerance of the interchangeable insert 2 on the cutter holder (the drill head 1) due to tolerance deviations.
• Fig. 5 shows a modification in which a linear contact of the insert 2 at the stop 10 is achieved in that the base 5 of the insert seat and the stop surface 10 span an angle that is less than 90 °, while the back of the insert 2 and the counter stop surface 110 run at 90 ° to one another.
• the embodiment of the deep hole drilling tool according to the invention shown in FIG. 1 is a single-lip deep hole drill with a cutting edge on the interchangeable plate 2, which is supported in the hole by two guide strips 3 over its diameter.
• this first embodiment is compared with a further embodiment which has only one guide bar 30. It turns out that the invention can also be implemented with such a deep hole drilling tool.
• the additional advantage here is that more space is available for the inner cooling duct (cf. outlet openings 12, 11).
• kits 7 shows five kits, each consisting of an interchangeable insert and two guide strips for equipping the drilling tool shown in FIG. 1.
• the kits cover five nominal diameters ND ⁇ to ND5, which are in a diameter range ⁇ ND (see Fig. 6).
• the through bore 8, the counter abutment surfaces 110, 114 and the secondary cutting edge 120 and the counter abutment surface 109 and the support surface 50 are designated only on the interchangeable insert for the largest nominal diameter ND ⁇ .
• FIG. 6 shows hatched the nominal diameter range ⁇ ND in which the universally suitable drilling head of the deep hole drill from FIG. 1 can be set to the five nominal diameters ND] _ to ND 5 by exchanging the cutting plates and guide strips.
• the through-hole 8 has the same distance c to the counter-stop surface 114 and b to the counter-stop surface 110 on all cutting inserts.
• the distance of the through-hole to the secondary cutting edge, which determines the hole diameter increases from WErt ag at nominal diameter ND5, namely from ND 5 to ND 4 by the value ⁇ a. It can be seen that the radial thickness of the guide bar, ie the length of the through hole (shown in dashed lines) also grows accordingly.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Drilling Tools (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (2)

Family

ID=32186058

Family Applications (1)

Country Status (8)

Cited By (2)

Families Citing this family (15)

Family Cites Families (18)

• 2002
  • 2002-12-19 DE DE20219754U patent/DE20219754U1/de not_active Expired - Lifetime
• 2003
  • 2003-12-18 EP EP03799449A patent/EP1572404B2/de not_active Expired - Lifetime
  • 2003-12-18 DE DE50308708T patent/DE50308708D1/de not_active Expired - Lifetime
  • 2003-12-18 AU AU2003299280A patent/AU2003299280A1/en not_active Abandoned
  • 2003-12-18 SI SI200331102T patent/SI1572404T2/sl unknown
  • 2003-12-18 DE DE10394164T patent/DE10394164D2/de not_active Expired - Fee Related
  • 2003-12-18 KR KR1020057011613A patent/KR20050085844A/ko not_active Ceased
  • 2003-12-18 WO PCT/DE2003/004274 patent/WO2004056518A2/de not_active Ceased
  • 2003-12-18 JP JP2004561064A patent/JP2006510493A/ja active Pending
• 2005
  • 2005-06-16 US US11/154,770 patent/US20050244237A1/en not_active Abandoned
• 2007
  • 2007-01-03 US US11/619,311 patent/US7296953B2/en not_active Expired - Lifetime

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