WO2004076109A1 - Taraud de filetage amovible - Google Patents

Taraud de filetage amovible Download PDF

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Publication number
WO2004076109A1
WO2004076109A1 PCT/HU2004/000017 HU2004000017W WO2004076109A1 WO 2004076109 A1 WO2004076109 A1 WO 2004076109A1 HU 2004000017 W HU2004000017 W HU 2004000017W WO 2004076109 A1 WO2004076109 A1 WO 2004076109A1
Authority
WO
WIPO (PCT)
Prior art keywords
tap
threading tap
tool shaft
working head
tool
Prior art date
Application number
PCT/HU2004/000017
Other languages
English (en)
Other versions
WO2004076109B1 (fr
Inventor
László VILMÁNYI
Original Assignee
Vilmanyi Laszlo
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 Vilmanyi Laszlo filed Critical Vilmanyi Laszlo
Publication of WO2004076109A1 publication Critical patent/WO2004076109A1/fr
Publication of WO2004076109B1 publication Critical patent/WO2004076109B1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00—Thread-cutting tools; Die-heads
    • B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
    • B23G5/06—Taps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G2200/00—Details of threading tools
    • B23G2200/38—Tools with shanks having a working end at each end of the shank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G2200/00—Details of threading tools
    • B23G2200/44—Taps with more than one threading section, the threading sections being axially spaced from one another

Definitions

  • the invention relates to an indexable threading tap for forming inner threads in a workpiece, having a longitudinal tool body and at least two threaded working heads arranged on the tool body for forming inner threads, and a tool shaft being to be bitten by a die chuck.
  • a working head provided with entering and controlling portions is situated in the first end of the tap.
  • the second end opposite to the first end of the tool is formed as a shaft having a smooth cylindrical shape, having a square chucking portion being able to be bitten by a die chuck or toolholder.
  • Further common feature of the different taps is having a so called neck part connecting the tool shaft and the working head.
  • the working head of the screwing tap has a screw-thread having cutting edges interrupted by one or more longitudinal or helical grooves.
  • Cutting operation made by screwing taps may be accomplished by means of machine tools or by manually operated taps.
  • Brace taps are available in sets, since this cutting operation consists of several different stages (pre-cutting, re- threading and finishing).
  • the machine screwing taps are formed as finishing tools with different (long or medium or short) entering edge lengths.
  • chipping does not occur during operation of a threading tap.
  • Such a threading tap can be known from the document US 6 514 148 B2, where the threading tap has a single working head and a tool shaft.
  • Main advantages of the threading tap as compared to screwing taps are: the higher productivity, longer lifetime, and favourable material quality obtained on the thread surface. Its only disadvantage is the very high tolerance requirement at the drilling operation of the bore-hole to be threaded.
  • FR 2 787 048 discloses a tap having a shank carrying a head with bearing grooves which hold the three tap wheels at a slight angle so that the circumferential ridges screw themselves into the bore, rolling the threads to shape as they do so.
  • the three tap wheels have ridges which successively increase in diameter to form the threads in easy stages.
  • brace taps With threading by brace taps the above mentioned exceptionally uneconomic base material requirement may be gathered, since two different taps (coarse cut and finishing) are required in this case.
  • the number of threads possibly prepared by a single thread shaping tap can be increased significantly and even so the production costs of a thread shaping tap do not increase, yet, there is a possibility to form and finish inner threads by means of the same tool.
  • the indexable threading tap for forming inner threads in a workpiece has a longitudinal tool body and at least two threaded working heads arranged on the tool body for forming inner threads, and a tool shaft being to be bitten by a die chuck, and the tool body is provided with at least two working heads, and the tool shaft is arranged between said two working heads.
  • the indexable threading tap advantageously has neck parts, which are arranged between the tool shaft and the respective working head.
  • the at least two working heads preferably have identical thread profiles, and a square chucking portion is formed on the tool shaft.
  • the indexable threading tap according to the invention is provided with two kind of working heads, where a first type working head is formed with coarse cut thread profile, and a second type working head is formed with finishing thread profile, and further, the first type working head formed with coarse cut thread profile is provided with a guidepin portion.
  • both working heads are provided with guidepin portions, and the chucking portion is provided on the centre part of the tool shaft.
  • the chucking portion is provided on a part of the tool shaft adjacent the first type working head formed with coarse cut thread profile.
  • chucking portions are provided on both ends of the tool shaft, and each working head is formed with coarse cut thread profile.
  • Figure 1 is a side elevation view of an indexable thread shaping tap according to the invention showing the at least two working heads formed on both ends of a tool
  • Figure 2 is a side elevation view of a thread shaping tap according to the invention showing the at least two working heads formed on both ends of a tool with neck parts formed between the working heads and the tool shaft,
  • Figure 3 is a side elevation view of a thread shaping tap according to the invention showing four working heads formed on ends of a tool.
  • Figure 4 is a side elevation view of a brace tap according to the invention, having a coarse cut and a finishing working head formed opposite ends of a tool.
  • Figure 1 shows a preferred embodiment of an indexable threading tap 1 with multiple working head A, B according to the present invention for forming inner threads.
  • Inner threads are formed on the inner periphery of bore-holes in a workpiece.
  • Indexable threading tap 1 has a longitudinal tool body 2 and at least two threaded working heads A, B arranged on the tool body 2 for forming inner threads, and a tool shaft C being to be bitten by a die chuck of a chucking machine or a handcrank, as against the taps according to the state of the art having working heads on the only one side of the tool shaft and the rest of the tool body 2 forms the tool shaft C.
  • Figure 1 shows two working heads A, B formed on either side of the tool shaft C placed therebetween.
  • the threading tap 1 according to the invention must be formed as a screwing tap in the firs case, while the latter case it is formed as a thread shaping tap. Since screw cutting is a chipping operation, the working heads A, B are provided with entering portion consisting of first or coarse screwing threads and a controlling portion consisting of finishing threads, and flutes for chips.
  • threading tap according to the invention is formed as a thread shaping tap, its working heads A, B must be provided with entering portion consisting of first or coarse shaping threads and a controlling portion consisting of finishing threads, both threads being able to plastically deform the material of the bore-hole periphery.
  • the threading tap 1 according to the invention is able to be formed either screwing tap or thread shaping tap, different embodiments according to the threading methods are not denotated in figures, because this is obvious to a person skilled in the art.
  • the threading tap according to the invention the tool shaft will be chucked in a chuck of a machine tool or a handcrank, respectively, to begin thread shaping or screwing.
  • the threading tap 1 will be ready again to work by the working head B.
  • FIG. 2 shows a second embodiment of the threading tap 1 according to the present invention.
  • the threading tap 1 has also at least two adequate working heads. Between each working head A, B and the tool shaft C a neck part D is formed resulting in the tool shaft C diameter to be different from the diameter of the working head A, B. By this neck part D it is possible to prevent the chips from clogging, when the threading tap 1 is formed as a screwing tap.
  • FIG 3 shows a preferred embodiment of the threading tap 1 according to the present invention.
  • the threading tap 1 has four adequate working heads A1, A2, B1, B2.
  • the working heads A1 , A2, B1 , B2 have an interspace G located therebetween. Therefore, when the first working head A1 will have been damaged the user will simply detach it from the threading tap 1 by means of a cutting device applied between working head A1 and A2 or B1 and B2. Consequently, the threading tap 1 will be ready again to work by the working head A2 or B2.
  • the turning of the threading tap 1 may be advantageous, when the given side has no longer any useful working head A1 , A2, B1 , B2.
  • the threading tap 1 may also be formed asymmetrically indeed, therefore it can be provided with more or less, i.e. only three working heads A1 , A2, B1.
  • Figure 4 shows a further, brace tap embodiment of the threading tap 1 according to the present invention for cutting handmade threads, which is similar to above second embodiment with exception that its first working head A is provided with threads for coarse cut, and the other working head B is provided with finishing threads.
  • the threading tap 1 might be turned about to finish the coarse thread prepared previously by working head A, without dechucking the threading tap 1 from the handcrack, and finishing operation can be accomplished by working head B.
  • the working head A formed with coarse cut thread profile is provided with a guidepin portion F to prevent the tool driven by hand from both lateral displacement and angular feeding in the bore-hole.
  • Guidepin portion F is free of cutting portions or forming threads.
  • This embodiment is essentially a set of brace taps formed in one tool, having both coarse cut and finishing working heads A, B.
  • a polygonal, e.g. a quadrangular chucking portion E is provided on a part of the tool shaft C, e.g. adjacent the first type working head A formed with coarse cut thread profile.
  • This chucking portion E is for fitting of a handcrank to the threading tap 1.
  • the tool shaft C might be provided more than one chucking portion E.
  • the chucking portion E is close about the working head A with coarse cut thread profile to minimise lateral displacement and angular feeding mentioned above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Forging (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

L'invention concerne un taraud de filetage amovible destiné à former des filets intérieurs dans une pièce à travailler et comprenant un corps d'outil longitudinal (2) et au moins deux têtes de travail filetées (A, B) disposées sur le corps d'outil (2) et permettant de former des filets intérieurs, ainsi qu'une tige d'outil (C) destinée à être serrée par un mandrin. Le corps d'outil (2) est pourvu d'au moins deux têtes de travail (A, B), la tige d'outil (C) étant disposée entre ces têtes d'usinage (A, B).
PCT/HU2004/000017 2003-02-27 2004-02-27 Taraud de filetage amovible WO2004076109A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU0300509A HUP0300509A2 (hu) 2003-02-27 2003-02-27 Menetalakító szerszám
HUP0300509 2003-02-27

Publications (2)

Publication Number Publication Date
WO2004076109A1 true WO2004076109A1 (fr) 2004-09-10
WO2004076109B1 WO2004076109B1 (fr) 2004-10-28

Family

ID=89981186

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU2004/000017 WO2004076109A1 (fr) 2003-02-27 2004-02-27 Taraud de filetage amovible

Country Status (2)

Country Link
HU (1) HUP0300509A2 (fr)
WO (1) WO2004076109A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010034455A1 (fr) * 2008-09-25 2010-04-01 Völkel GmbH Taraud
CN102161123A (zh) * 2011-04-27 2011-08-24 扬州江宇刃具有限公司 一种丝锥
CN102179577A (zh) * 2011-04-27 2011-09-14 扬州江宇刃具有限公司 一种螺纹修复丝锥

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB366519A (en) * 1929-11-09 1932-01-27 Scovill Manufacturing Co Improvements in screw-cutting taps
DE689017C (de) * 1937-12-05 1940-03-08 Kurt Meissner Gewindebohrer
GB677113A (en) * 1949-09-21 1952-08-06 Reinhold Kummel Improvements in or relating to devices for cutting screw threads
GB760936A (en) * 1953-10-08 1956-11-07 Frederick Bates & Co Birmingha A new or improved screw tapping tool
US3531810A (en) * 1969-09-25 1970-10-06 Clarence J Fure Tapping tools
DE2625863A1 (de) * 1976-06-09 1977-12-15 Reime Fa Ernst Werkzeug zur herstellung von innengewinden, insbesondere gewindebohrer
US4412764A (en) * 1980-11-10 1983-11-01 Wawrzyniak Walter W Double ended tap
DE10002756A1 (de) * 2000-01-22 2001-07-26 Zahnradfabrik Friedrichshafen Gewindefurcher

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB366519A (en) * 1929-11-09 1932-01-27 Scovill Manufacturing Co Improvements in screw-cutting taps
DE689017C (de) * 1937-12-05 1940-03-08 Kurt Meissner Gewindebohrer
GB677113A (en) * 1949-09-21 1952-08-06 Reinhold Kummel Improvements in or relating to devices for cutting screw threads
GB760936A (en) * 1953-10-08 1956-11-07 Frederick Bates & Co Birmingha A new or improved screw tapping tool
US3531810A (en) * 1969-09-25 1970-10-06 Clarence J Fure Tapping tools
DE2625863A1 (de) * 1976-06-09 1977-12-15 Reime Fa Ernst Werkzeug zur herstellung von innengewinden, insbesondere gewindebohrer
US4412764A (en) * 1980-11-10 1983-11-01 Wawrzyniak Walter W Double ended tap
DE10002756A1 (de) * 2000-01-22 2001-07-26 Zahnradfabrik Friedrichshafen Gewindefurcher

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010034455A1 (fr) * 2008-09-25 2010-04-01 Völkel GmbH Taraud
US8944728B2 (en) 2008-09-25 2015-02-03 Klaus Peter Vökel Screw tap
CN102161123A (zh) * 2011-04-27 2011-08-24 扬州江宇刃具有限公司 一种丝锥
CN102179577A (zh) * 2011-04-27 2011-09-14 扬州江宇刃具有限公司 一种螺纹修复丝锥

Also Published As

Publication number Publication date
WO2004076109B1 (fr) 2004-10-28
HUP0300509A2 (hu) 2004-10-28
HU0300509D0 (en) 2003-05-28

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