WO2000061323A1 - Outil de perçage - Google Patents

Outil de perçage Download PDF

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Publication number
WO2000061323A1
WO2000061323A1 PCT/DE2000/000960 DE0000960W WO0061323A1 WO 2000061323 A1 WO2000061323 A1 WO 2000061323A1 DE 0000960 W DE0000960 W DE 0000960W WO 0061323 A1 WO0061323 A1 WO 0061323A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
drilling
drilling tool
cutting edge
tool according
Prior art date
Application number
PCT/DE2000/000960
Other languages
German (de)
English (en)
Inventor
Felix Leeb
Original Assignee
Felix Leeb
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 Felix Leeb filed Critical Felix Leeb
Priority to DE10080825T priority Critical patent/DE10080825D2/de
Priority to AU47429/00A priority patent/AU4742900A/en
Publication of WO2000061323A1 publication Critical patent/WO2000061323A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B23B51/0486—Drills for trepanning with lubricating or cooling equipment
    • B23B51/0493—Drills for trepanning with lubricating or cooling equipment with exchangeable cutting inserts, e.g. able to be clamped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/20—Number of cutting edges
    • B23B2251/202—Three 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
    • B23B2251/28—Arrangement of teeth
    • B23B2251/287—Cutting edges having different lengths

Definitions

  • the invention relates to a drilling tool according to the preamble of claim 1.
  • a drilling tool is known for example from DE-05 2420191.
  • the use of such tools with this M face cutting edge is only possible when machining short-chipping materials such as alloy aluminum.
  • This limited possibility of using the drilling tools with such an M face cutting edge is mainly due to the fact that the removal of the drilling chips in the central area of the drill must also be done more or less by shearing, whereby above all the chip produced in this way cannot flow off unhindered.
  • a drilling tool is known from DE 44 16040 A1, which is equipped with indexable inserts, an M cutting edge also being indicated slightly here. With this cutting arrangement in the center area, the drilling swarf is removed by pressing or shearing off, whereby the drilling swarf cannot flow unhindered here either. Furthermore, no three full-fledged cutting edges can be attached to the insert holder with this insert design.
  • a cutting tool which is equipped with an indexable insert is known from EP 42 12 OA1.
  • the insert consists of a round plate, which can then be fixed in the holder by a 90 ° recess in the circumferential area of the round plate according to its position.
  • ERSATZBLAH (RULE 26) (State of the art in the processing of steel, etc.) forms a built-up edge, which then usually ends in a tool breakage. Processing in the dry process is the same as cooling and removing the chips only by means of compressed air, be it during drilling or milling, due to their advantages, it is becoming more and more popular. The ability to dispense with the addition of cooling lubricants saves considerable costs when disposing of the chips that are produced.
  • Another problem with creating a hole is that the drilling tip mentioned above comes to the cutting insert during the drilling process in its central area with zero (identical) cutting speed. This creates a not inconsiderable axial resistance, which on the one hand requires powerful and above all stable machines. because of the already mentioned large axial resistance. Also the removal of the resulting chips during the machining process during dry machining also a bit problematic. On the other hand, the core hole advance in a blind hole should also be shortened if a thread is to be introduced into it. This is especially true for workpieces with thin walls. Furthermore, special deep drilling tools are currently required to create very deep holes.
  • a tool equipped with three cutting edges would be advantageous for precision bores and deep bores, but the use of such tools is not possible with the cutting geometries currently used for cutting, especially in the interchangeable insert design in full material.
  • a cutting tool with three end cutting edges results in an additional increase in cutting performance of at least 50%.
  • a chamfering of the created bore recesses with the current one is also used.
  • Cutting edge geometry is not possible, even if the tool is used on CNC-controlled machines. This still requires a specially designed step drill for the respective depth of cut. At the moment, even a slight diameter adjustment of the tool cutting edges is not possible, even when using interchangeable cutting inserts for multi-cutting tools. In the case of deep bore recesses, a course of the recess made deviating from the bore axis can often be determined.
  • the invention has for its object to provide a drilling tool which is also suitable for dry drilling, which solves the problems shown above, regardless of whether the tool is made of solid material or is equipped with a cutting plate that is continuous in its entire width, or can be continuous Cutting plate also consist of several plates, these being above all interchangeably attached, such that at least two mirror-like cutting geometries always come into cutting engagement, at least in the area of the main end cutting edges.
  • a drilling tool which is also suitable for dry drilling, which solves the problems shown above, regardless of whether the tool is made of solid material or is equipped with a cutting plate that is continuous in its entire width, or can be continuous Cutting plate also consist of several plates, these being above all interchangeably attached, such that at least two mirror-like cutting geometries always come into cutting engagement, at least in the area of the main end cutting edges.
  • interchangeable cutting inserts there should then be a possibility to be able to continuously adjust the cutting diameter with these tools by approx. 1 mm.
  • the drilling tool is not covered with a drilling tip in its face cutting center area, but is this area is provided with a recess.
  • This recess is made at an angle of approximately 2 x 45 ", or this recess can be made in significantly different degrees.
  • the recess size is approximately a quarter to a third of the respective tool diameter.
  • at least one is the inner one End cutting edges are shortened in length starting from the center region of the drilling tool, one of the remaining cutting edges then being extended in this cutting length by approximately this dimension beyond the drill axis.
  • This modification of the center cutting edge region results in the following advantages: the zero cutting speed occurring in the drilling center is eliminated, This means that chip removal in the center of the hole is carried out by a cutting process in this cutting geometry design.
  • this chamfer can be used to chamfer the created recess when using such tools on CNC-controlled machines, regardless of the depth of the recess (this eliminates the need for step drills). If a radius is applied in the transition from the main cutting edges to the side cutting edges and from the inner cutting edges to the main cutting edges, the service life of the tools is increased on the one hand, and on the other hand, the drilling chips are rolled better, which further improves chip removal. In order to improve chip evacuation, particularly in the case of very deep bore recesses, the end cutting edges can also be designed in a slight arc shape. By this measure, the chips are connected to a Chip form groove broken into short chips.
  • Figure 1 shows a drilling tool with currently known end cutting edge geometry for machining steel, etc.
  • Figure 2 shows a hole pattern that is created with a tool according to Fig.1
  • Figure 3 shows a drilling tool with the proposed face cutting edge geometry
  • FIG. 4 shows a hole pattern that was created with a tool according to FIG. 3
  • FIG. 5 shows a drilling tool with a cutting edge transition from the main cutting edge to the peripheral cutting edge with a 45 ° and a one-sided clearance of the cutting edge in the center area
  • FIG. 6 shows a drilling tool, the face cutting transitions being formed by radii
  • Figure 7 shows a drilling tool with arcuate main cutting edges
  • Figure 8 shows a drilling tool which is equipped with two interchangeable cutting plates.
  • FIG. 9 shows this drilling tool in section A-A
  • Figure 10 shows a drilling tool which is equipped with three interchangeable cutting plates in section A-A.
  • Figure 11 shows a drilling tool in which the respective main cutting edge is created by two arcuate cutting edges.
  • FIG. 1 shows a drilling tool (1) which is equipped with a currently known end cutting edge geometry (2) and also flank cutting edges (3).
  • This end cutting edge geometry has a drilling tip (11) in its center (same as drilling axis) (4)
  • FIG. 2 a hole pattern, which is created with a tool according to FIG. 1, is shown in FIG. 2, the length of the core hole advance (10) also being shown there.
  • Fig. 3 shows a drilling tool (1) which is equipped with the new face cutting geometry.
  • the center area (4a) is covered with a recess (5) on both sides, which extends in a diameter dimension of approximately 1/4 to 1/3 of the entire tool diameter and is offset by 180 "at an angle of approximately 45" in each case. extend to the drilling axis (4), the respective course being at least in the region of the drilling axis (4) on the center line or they can each be a few hundredths of a mm behind.
  • the- se a main cutting edge (6), which then runs at an opposite angle to the flank cutting edge (3).
  • FIG. 4 a hole pattern, which is created with a tool according to FIG. 3, is shown in FIG. 4, the core hole advance (10) shortened by approximately 1/3 being shown here. 5 shows a one-sided clearance (7) in the center area (4a), whereby this inner cutting edge (5) is shortened, on the other hand, the opposite cutting edge (5) is extended by this amount.
  • This measure results in an easily controllable deflection of the tool during the drilling process, as a result of which a minimally larger bore recess is produced compared to the tool diameter.
  • the size of the deflection depends on the size of the franking (7).
  • the transition from the main cutting edge (6) to the flank cutting edge (3) is created by a 45 'chamfer (8).
  • the respective cutting edge transitions are formed by a radius (R).
  • the main end cutting edges (6) are designed in the shape of an arc (9), and the cutting edge (5) could also be made in the form of an arc.
  • a coolant channel (12) can also be seen.
  • all cutting edges used are provided with the required clearance angle, at least the main front cutting edge (6) being created with a very positive cutting edge engagement angle.
  • FIG. 9 shows the section AA from FIG. 8.
  • FIG. 10 shows a further section AA, in which case three interchangeable cutting plates (13 + 14) are preferably attached by screws (15) at an offset of 120 'to the cutter holder (16) are.
  • the length of the face cutting edge (5) extends beyond the drilling axis (4) in the case of the cutting plate (13).
  • two cutting plates (14) are attached, in which the front cutting edge dimension (5) is shortened by this dimension.
  • chip removal is achieved in the cutting process in the area of the drilling axis (4).
  • a chipbreaker groove offset in the circumferential direction could be introduced at least in the area of the main cutting edge (6) or a further cutting edge in the shape of an arc (24) could follow the curved cutting edge (6) (Fig. 11), which creates smaller chips.

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

Abstract

L'invention concerne un outil de perçage, pouvant être également utilisé pour l'usinage à sec de trous percés dans tout matériau usinable. L'utilisation de cet outil de perçage, équipé d'un tranchant en forme de M, sur des machines à commande numérique par ordinateur, permet de biseauter simultanément le trou percé. La présence d'un évidement pratiquement à symétrie spéculaire au niveau de la pointe de perçage empêche la formation d'arêtes rapportées au niveau de la pointe de perçage, phénomène fréquent lors de la réalisation de trous selon un procédé à sec (c'est-à-dire uniquement avec un refroidissement à l'air comprimé). De plus, la suppression de la vitesse de coupe nulle dans la zone centrale permet de réduire la résistance axiale d'au moins 50 %, d'utiliser des machines pour le perçage présentant une stabilité inférieure, et surtout de réaliser un perçage d'un diamètre de 12 mm avec une perceuse à main, sans recourir à des appareils supplémentaires (c'est-à-dire uniquement à la main), dans un matériau plein et dans l'acier. Dans ce cas, il est nécessaire d'effectuer au préalable un léger centrage. En outre, les problèmes rencontrés lors du perçage de trous profonds selon un procédé à sec peuvent être résolus facilement, grâce à la modification d'un des tranchants de flanc faciaux situé désormais à l'intérieur, dans la zone centrale. A cet effet, un tranchant est raccourci, afin de permettre une légère déviation de l'outil de perçage et afin de percer ainsi un trou dont le diamètre est légèrement supérieur à celui de l'outil. La possibilité de monter trois tranchants performants même sur des outils de perçage équipés de plaquettes de coupe interchangeables et de réaliser un trou directement dans le matériau plein, permet d'augmenter les performances d'usinage d'au moins 50 %.
PCT/DE2000/000960 1999-04-07 2000-03-25 Outil de perçage WO2000061323A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10080825T DE10080825D2 (de) 1999-04-07 2000-03-25 Bohrwerkzeug
AU47429/00A AU4742900A (en) 1999-04-07 2000-03-25 Drilling tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999115536 DE19915536C1 (de) 1999-04-07 1999-04-07 Bohrwerkzeug
DE19915536.4 1999-04-07

Publications (1)

Publication Number Publication Date
WO2000061323A1 true WO2000061323A1 (fr) 2000-10-19

Family

ID=7903695

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/000960 WO2000061323A1 (fr) 1999-04-07 2000-03-25 Outil de perçage

Country Status (3)

Country Link
AU (1) AU4742900A (fr)
DE (2) DE19915536C1 (fr)
WO (1) WO2000061323A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130302101A1 (en) * 2010-09-17 2013-11-14 Terry Scanlon Twist drill assembly, components for same and method for making same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10236802C1 (de) * 2002-08-10 2003-10-09 Felix Leeb Bohrgewindefräser welcher sich auch zum Einsatz bei Stahl eignet
DE10334454B3 (de) * 2002-08-10 2005-05-12 Felix Leeb Bohrgewindefräser welcher sich auch zum Einsatz bei Stahl eignet
DE102012101993A1 (de) 2012-03-09 2013-09-12 Franken GmbH + Co KG Fabrik für Präzisionswerkzeuge Fräswerkzeug

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7441010U (de) * 1975-04-03 Bilz H Bohrwerkzeugschneidkopf
US4230429A (en) * 1977-07-06 1980-10-28 Komet Stahlhalter- Und Werkzeugfabrik Robert Breuning Gmbh Boring tool for making borings in solid metal material of workpieces
EP0112136A2 (fr) * 1982-12-13 1984-06-27 Carboloy Inc. Elément tranchant pour outils coupants
US4671710A (en) * 1982-10-29 1987-06-09 Nippon Oil & Fats Co., Ltd. Drill bit
DE3842209A1 (de) * 1988-12-15 1990-06-21 Walter Gmbh Montanwerke Bohrwerkzeug fuer metallische werkstoffe, kunststoffe und dergl.
EP0852979A1 (fr) * 1997-01-08 1998-07-15 Sumitomo Electric Industries, Ltd. Plaquette de coupe et foret

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2420191A1 (de) * 1974-04-26 1975-11-13 Krupp Gmbh Bohrwerkzeug
DE3022104C2 (de) * 1980-06-12 1982-08-19 Mapal Fabrik für Präzisionswerkzeuge Dr.Kress KG, 7080 Aalen Zerspanungswerkzeug mit Wendeplatte
DE9407575U1 (de) * 1994-05-03 1994-09-01 Johne & Co Präzisionswerkzeuge GmbH, 46286 Dorsten Bohrwerkzeug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7441010U (de) * 1975-04-03 Bilz H Bohrwerkzeugschneidkopf
US4230429A (en) * 1977-07-06 1980-10-28 Komet Stahlhalter- Und Werkzeugfabrik Robert Breuning Gmbh Boring tool for making borings in solid metal material of workpieces
US4671710A (en) * 1982-10-29 1987-06-09 Nippon Oil & Fats Co., Ltd. Drill bit
EP0112136A2 (fr) * 1982-12-13 1984-06-27 Carboloy Inc. Elément tranchant pour outils coupants
DE3842209A1 (de) * 1988-12-15 1990-06-21 Walter Gmbh Montanwerke Bohrwerkzeug fuer metallische werkstoffe, kunststoffe und dergl.
EP0852979A1 (fr) * 1997-01-08 1998-07-15 Sumitomo Electric Industries, Ltd. Plaquette de coupe et foret

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130302101A1 (en) * 2010-09-17 2013-11-14 Terry Scanlon Twist drill assembly, components for same and method for making same
US9302332B2 (en) * 2010-09-17 2016-04-05 Element Six Limited Twist drill assembly, components for same and method for making same

Also Published As

Publication number Publication date
AU4742900A (en) 2000-11-14
DE19915536C1 (de) 2001-01-04
DE10080825D2 (de) 2001-07-12

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