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DE452596C - Taps with tapered chamfer thread - Google Patents

Taps with tapered chamfer thread

Info

Publication number
DE452596C
DE452596C DEH104974D DEH0104974D DE452596C DE 452596 C DE452596 C DE 452596C DE H104974 D DEH104974 D DE H104974D DE H0104974 D DEH0104974 D DE H0104974D DE 452596 C DE452596 C DE 452596C
Authority
DE
Germany
Prior art keywords
thread
taps
tapered chamfer
tap
chamfer thread
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.)
Expired
Application number
DEH104974D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
Publication date
Priority to DEH104974D priority Critical patent/DE452596C/en
Application granted granted Critical
Publication of DE452596C publication Critical patent/DE452596C/en
Expired legal-status Critical Current

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
    • B23G2210/00—Details of threads produced
    • B23G2210/41—Threads having a stepped profile

Landscapes

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

Description

Bei allen bisher bekannt gewordenen Gewindebohrern tritt in der' Praxis sehr leicht ein Größerschneiden des Muttergewindes, besonders im Kern, abgesehen von anderen rein konstruktiven Ursachen, allein dadurch auf, daß der Gewindebohrer bei ungeschickten Bewegungen des Schneidenden »torkelt«.With all taps that have become known so far, this occurs very easily in practice a larger cutting of the nut thread, especially in the core, apart from other pure constructive causes, solely due to the fact that the tap is clumsy Movements of the cutter "staggers".

Dieses für die Herstellung eines genauen Muttergewindes sehr nachteilige Torkeln desThis staggering of the very disadvantageous for the production of an exact nut thread

ίο Gewindebohrers soll nun der Erfindung gemäß dadurch verhindert werden, daß der Gewindebohrer an seinem vorderen Ende ein zylindrisches Gewindestück erhält, welches dem Gewindebohrer Halt und Führung gibt.ίο tap should now according to the invention can thereby be prevented that the tap receives a cylindrical thread piece at its front end, which gives the tap support and guidance.

In der Zeichnung ist eine Ausführungsform der Erfindung beispielsweise dargestellt.In the drawing, an embodiment of the invention is shown as an example.

Der Gewindebohrer β hat vor dem parallel zur Bohrerachse liegenden Gewindeanschnitt b ein zylindrisches und scharf ausgeschnittenes, jedoch nicht hinterdrehtes bzw. hinterfeiltes Gewindestück c, dessen Durchmesser etwa o,i bis 0,5 mm über dem theoretischen Kerndurchmesser liegt. Infolgedessen bleibt das Vorgewinde c vor dem mit Gewinde zu versehenden Loch beim Ansetzen des Bohrers zunächst stehen und saugt sich nach sanftem Druck in das Kernloch hinein. Dieser beim Schneiden sich sofort in das Kernloch hineinschraubende, voll ausgeschnittene Gewindeteile gibt damit dem Gewindebohrer Halt und Führung und verhindert also das schädliche Torkeln desselben und die Wirkung des Anschnittes als Reibahle, wodurch ein Größerschneiden des Gewindes zwangläufig verhindert wird.The tap β has in front of the thread cut b parallel to the drill axis a cylindrical and sharply cut, but not back-turned or back-filed thread piece c, the diameter of which is about 0.1 to 0.5 mm above the theoretical core diameter. As a result, the pre-thread c initially stops in front of the hole to be provided with a thread when the drill is applied and, after applying gentle pressure, sucks itself into the core hole. This fully cut thread part, which immediately screws into the core hole when cutting, provides the tap with support and guidance and prevents the tap from staggering and acting as a reamer, which inevitably prevents the thread from being cut larger.

Claims (1)

Patentanspruch:Claim: Gewindebohrer mit kegeligem Anschnittgewinde, dadurch gekennzeichnet, daß vor dem parallel zur Bohrerachse beginnenden Anschnittgewinde (b) ein zylindrisches Gewindestück (c) liegt, welches scharf ausgeschnitten und nicht hinterdreht oder hinterfeilt ist und dessen Durchmesser etwa 0,1 bis 0,5 mm über dem theoretischen Kerndurchmesser liegt.Taps with a conical chamfer thread, characterized in that in front of the chamfer thread (b) starting parallel to the drill axis there is a cylindrical thread piece (c) which is cut out sharply and not undercut or filed and whose diameter is about 0.1 to 0.5 mm above the theoretical core diameter.
DEH104974D Taps with tapered chamfer thread Expired DE452596C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH104974D DE452596C (en) Taps with tapered chamfer thread

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH104974D DE452596C (en) Taps with tapered chamfer thread

Publications (1)

Publication Number Publication Date
DE452596C true DE452596C (en) 1927-11-14

Family

ID=7169654

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH104974D Expired DE452596C (en) Taps with tapered chamfer thread

Country Status (1)

Country Link
DE (1) DE452596C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2566094C1 (en) * 2014-04-18 2015-10-20 Кирилл Николаевич Войнов Machine tap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2566094C1 (en) * 2014-04-18 2015-10-20 Кирилл Николаевич Войнов Machine tap

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