EP4237183A1 - Clamping system for reaming bit tools - Google Patents

Clamping system for reaming bit tools

Info

Publication number
EP4237183A1
EP4237183A1 EP21731382.4A EP21731382A EP4237183A1 EP 4237183 A1 EP4237183 A1 EP 4237183A1 EP 21731382 A EP21731382 A EP 21731382A EP 4237183 A1 EP4237183 A1 EP 4237183A1
Authority
EP
European Patent Office
Prior art keywords
reaming bit
face
holder
created
hole
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
EP21731382.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Stanislav Fiala
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.)
Final Tools AS
Original Assignee
Final Tools AS
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 Final Tools AS filed Critical Final Tools AS
Publication of EP4237183A1 publication Critical patent/EP4237183A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/008—Chucks; Expansion mandrels; Adaptations thereof for remote control with arrangements for transmitting torque
    • 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
    • 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
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D77/00—Reaming tools
    • B23D77/02—Reamers with inserted cutting edges
    • 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
    • B23D77/02—Reamers with inserted cutting edges
    • B23D77/025—Securing arrangements for cutting inserts
    • 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
    • B23D2277/02—Cutting head and shank made from two different components which are releasably or non-releasably attached to each other
    • 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
    • B23D2277/06—Connections between component parts
    • 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
    • B23D2277/06—Connections between component parts
    • B23D2277/068—Connections between component parts using a groove in the top face of the cutting insert or bit engaged by a clamp
    • 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
    • B23D2277/10—Reaming tools comprising means for damping of vibration, i.e. for reduction of chatter
    • 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
    • B23D2277/10—Reaming tools comprising means for damping of vibration, i.e. for reduction of chatter
    • B23D2277/105—Reaming tools comprising means for damping of vibration, i.e. for reduction of chatter with cutting edges located at unequal angles around the periphery of the tool
    • 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
    • B23D2277/20—Number of cutting edges
    • B23D2277/204—Five
    • 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
    • B23D2277/46—Guiding pads
    • 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
    • B23D2277/80—Reaming tools comprising a spring

Definitions

  • the invention relates to a new design of a clamping system for reaming bit tools, with particular application on automated CMC machines.
  • a reaming tool is known from the document EP 1657014 B1, the cutting part of which consists of a compact carbide disc with a clamping cylindrical shank.
  • Cutting teeth with longitudinal and transverse cutting blades are provided on the half of circumference of the disc and cylindrical longitudinal support faces are created on the opposite half of the circumference of the shaped disc.
  • the cylindrical clamping shank is arranged in the opening of a steel holder with a press-fit, thereby allowing thermal clamping and unclamping of the cutting portion of the reaming tool.
  • the main disadvantage of this technical solution is that the holder with the cutting reaming head has to be clamped in the machine tool spindle by means of a centricity-controlled hydro clamp and always individually centred directly on the machine.
  • the aim of the invention is to present a clamping system for a reaming tool where the tool can be clamped via standard hydro damps without cen!ncity control directly on the machine, thereby saving a lot of unproductive time on very expensive production equipment.
  • a further aim of such a damping system for reaming tools is to reduce manufacturing costs by at least 40 % compared to the currently known reaming tool designs known, for example, from EP 1657014 B1 or EP 1240963 B1. This is achieved in particular by minimizing the amount of expensive progressive materials used in cutting blades and also the costs associated with their processing.
  • Fig.1 ilustates a front view of a reaming bit tool with a reaming bit provided from a cermet monoblock with three cutting blades and two longitudinal guiding facets mounted on a clamping unit according to the invention, Fig.
  • Fig. 2 is a section through the clamping unit according to the invention along the line A-A of Fig.1
  • Fig.3 is a front view of the reaming bit tool
  • Fig.4 is a section through the clamping unit along the line A-A of Fig.3
  • Fig.5 shows a front view of a reaming bit tool with a reaming bit
  • Fig.6 is a section through a disassembled damping unit according to the invention along the line A-A of Fig.5
  • Fig.7 shows a bit tool with non-dismantably connected blades and facets of different materials
  • Fig.8 is the bit tool section along the line A-A of Fig. 7
  • Fig. 9 shows an exemplary embodiment with a driving groove on the face for multi- bladed reaming bit without guides
  • Fig. 10 is the bit tool section along the line A- A of Fig. 9.
  • the damping system 1 is intended for a reaming bit tool such as the reaming bit 2 shown in Fig. 1 in a front view.
  • the latter is provided with three tooth protrusions 14 with cutting blades 9 and two longitudinal guiding facets 10, between the tooth protrusions 14 there are tooth gaps 13 into which cooling channels 23 mouths.
  • Such an arrangement is known from the prior art, but in addition, there is a driving groove 12 opposite to the middle of the said three tooth protrusions 14 with cutting blades 9. The function of driving groove 12 will be explained in connection with Fig. 2 and 4.
  • FIG. 2 there is a section of the clamping system 1 according to the invention along the line A-A of Fig. 1 Just before tightening the system.
  • a cylindrical holder 3 provided at one end with a clamping portion 26 for connection to a corresponding part of the damping means, and at the opposite end a connecting interface 15 is provided for dismounting the reaming bit 2, on the surface of which three cutting blades 9 and two longitudinal guide facets 10 are provided.
  • the face 17 of the holder 3 on the side of the connecting interface 15 being perpendicular to the axis 16 of the holder 3 and adjacent to the face 7 of the cutting bit 2, which is perpendicular to the axis of the cylindrical hole 11 of the reaming bit 2.
  • the cutting bit 2 is connected to the holder 3 by means of a centering connecting bolt 5 with a cylindrical head 25 and an external thread 29 which is screwed into the central threaded hole 21 in the holder 3 and abuts the face of a shank 31 of the connecting bolt 5.
  • Two cylindrical shanks 30A and 308 are provided between the thread 29 and the cylindrical head 25, whereby in the damping system 1 the cylindrical shank 30A is inserted with a clearance of up to 0,01 mm in the cylindrical hole 20 of the holder 3 and in the reaming bit tool clamping system 1 the cylindrical shank 30B is inserted with a clearance of up to 0,05 mm in the hole 11 of the reaming bit tool 2.
  • the fully assembled clamping system 1 is shown in Fig. 4.
  • a flexible deformation member 4 created as a disc spring, which axially presses with a defined force the face 7 of the reaming bit 2 against the face 17 of the reaming bit tool holder 3.
  • this flexible member 4 is not yet fully abating the bolt 5.
  • the fully tightened and abiding flexible member 4 is shown in Fig. 4.
  • a blind central channel 22 is provided in the holder 3 for the supply of cooling medium which enters the side channels 23, which mouth into the tooth gaps 13 and into the longitudinal channels 32.
  • the reaming bit 2 Is connected to the holder 3 by a centering connecting bolt 5 having a cylindrical head 25 and an external thread 29 which is screwed into the central thread 21 in the holder 3 and is tightened to a prescribed torque against the inner face 27 of the shank of the connecting bolt 5 which abuts the flexible member 4.
  • Fig.3 represents the situation just before the compression of the mentioned flexible member 4 and Fig. 4 presents the situation after the compression of the flexible member 4.
  • a reaming bit 2 formed from a sintered carbide monolith is shown In which three tooth protrusions 14 are formed with soldered prisms 24 of cermet with formed cutting blades 9 and two longitudinal grooves are created on the periphery, in which guide rails 18 of polycrystalline diamond with created guide facets 10 are soldered.
  • a driving groove 12 is created opposite to the cutting blades 9, into which a driving protrusion 19 created on the face 17 of the reaming bit tool holder 3 engages in the clamping system 1 of the reaming bit tool.
  • a mufti-blade reaming bit 2 created from a cermet monolith is shown, wherein on the inner seating face 7 of the reaming bit 2, opposite to the cutting blade 9, a driving groove 12 is created into which a driving protrusion 19 created on the face 17 of the holder 3 of the reaming bit 2 engages in the clamping system 1 for the reaming bit tool.
  • the main technological advantage of the new design, especially of the monolithic reaming bit of the reaming bit tool is the very economical manufacturability of the reaming bit, which can be produced from a semi-finished product made of powdered metals and bonding metal by pressing in moulding presses and further finished by grinding on CMC machines.
  • Another significant technological advantage is that the shape and dimension of the reaming bits according to the invention enables very advantageous application of wear-resistant coatings in vacuum chambers with a significantly larger number of tools compared to the currently known designs of reaming tools, thus reducing the production costs of coating by at least 50 %.
  • the reaming bit is mounted in the clamping system for the reaming bit tool on the cylindrical shank of the bolt with a radial clearance of up to 0.05 mm and is rotaf locally driven while being pressed by a defined force against the face of the reaming bit tool holder. This allows the reaming bit in the cutting process to deflect within the radial clearance, thereby compensating for the axial misalignment between the rotational axis of the reaming bit tool and the axis of the pre-machined hole prior to reaming.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP21731382.4A 2020-11-26 2021-05-26 Clamping system for reaming bit tools Pending EP4237183A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2020632A CZ308960B6 (cs) 2020-11-26 2020-11-26 Upínací systém vystružovacích korunkových nástrojů a tyto nástroje
PCT/CZ2021/000021 WO2022111743A1 (en) 2020-11-26 2021-05-26 Clamping system for reaming bit tools

Publications (1)

Publication Number Publication Date
EP4237183A1 true EP4237183A1 (en) 2023-09-06

Family

ID=76374844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21731382.4A Pending EP4237183A1 (en) 2020-11-26 2021-05-26 Clamping system for reaming bit tools

Country Status (3)

Country Link
EP (1) EP4237183A1 (cs)
CZ (1) CZ308960B6 (cs)
WO (1) WO2022111743A1 (cs)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ2022309A3 (cs) * 2022-07-14 2023-04-19 FINAL Tools a.s. Vystružovací nástroj
CZ2024251A3 (cs) * 2024-06-21 2025-09-03 FINAL Tools a.s. Sada vystružovacího nástroje, jeho upínací části a demontážního klíče a způsob demontáže

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1414565A (en) * 1920-03-02 1922-05-02 David R Gallagher Adjustable reamer
US1831371A (en) * 1926-04-03 1931-11-10 Harry O Smith Reamer and pilot therefor
US2936659A (en) * 1957-09-27 1960-05-17 Waldo L Garberding Cutting tool
GB1233953A (cs) * 1968-10-08 1971-06-03
DE2702620B2 (de) * 1977-01-22 1980-04-24 Mapal Fabrik Fuer Praezisionswerkzeuge Dr. Kress Kg, 7080 Aalen Maschinenreibahle
DE4202751A1 (de) * 1992-01-31 1993-08-05 Mapal Fab Praezision Einmesser-reibahle
DE4329553C2 (de) * 1993-09-02 1997-12-18 Beck August Gmbh Co Einmesser-Reibahle
SE509948C2 (sv) * 1996-04-25 1999-03-29 Seco Tools Ab Ställbar brotsch avsedd för små håldiametrar
DE10112966A1 (de) 2001-03-14 2002-10-02 Mapal Fab Praezision Verbindungsstelle
DE10144759A1 (de) * 2001-09-11 2003-03-27 Komet Stahlhalter Werkzeuge Kombinationswerkzeug
DE10222445A1 (de) * 2002-05-22 2003-12-04 Horn P Hartmetall Werkzeugfab Schneidplatte für ein Bearbeitungswerkzeug sowie Halter für eine derartige Schneidplatte
CZ15056U1 (cs) * 2004-11-16 2005-01-25 Ham - Final S. R. O. Nástroj pro vystružování děr zejména malých a středních průměrů
DE102005011000A1 (de) * 2005-03-10 2006-09-14 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Werkzeug zur Feinbearbeitung von Bohrungsoberflächen
DE102005031683A1 (de) * 2005-07-05 2007-01-25 Dihart Ag Maschinenwerkzeug
DE102006028729A1 (de) * 2006-06-20 2007-12-27 Komet Group Holding Gmbh Maschinenwerkzeug sowie Schneidring für ein Maschinenwerkzeug
DE202010002058U1 (de) * 2010-02-08 2011-06-09 Johne & Co. Präzisionswerkzeuge GmbH, 46286 Werkzeug und Werkzeugkopf zum Bearbeiten von Bohrungen und ähnlichen Materialausnehmungen
DE102014208102B4 (de) * 2014-04-29 2016-07-21 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Zerspanungswerkzeug
CH710710A1 (de) * 2015-02-11 2016-08-15 Urma Ag Maschinenreibwerkzeug mit einem Schaft und einem darauf montierten Wechselkopf, sowie Wechselkopf und Schaft für ein Maschinenreibwerkzeug.
DE102016105234A1 (de) * 2016-03-21 2017-09-21 Kennametal Inc. Bohrwerkzeug

Also Published As

Publication number Publication date
CZ2020632A3 (cs) 2021-10-13
WO2022111743A1 (en) 2022-06-02
CZ308960B6 (cs) 2021-10-13

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