DE452596C - Taps with tapered chamfer thread - Google Patents
Taps with tapered chamfer threadInfo
- 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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2566094C1 (en) * | 2014-04-18 | 2015-10-20 | Кирилл Николаевич Войнов | Machine tap |
-
0
- DE DEH104974D patent/DE452596C/en not_active Expired
Cited By (1)
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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