DE480013C - Process for the production of taps - Google Patents

Process for the production of taps

Info

Publication number
DE480013C
DE480013C DEH104688D DEH0104688D DE480013C DE 480013 C DE480013 C DE 480013C DE H104688 D DEH104688 D DE H104688D DE H0104688 D DEH0104688 D DE H0104688D DE 480013 C DE480013 C DE 480013C
Authority
DE
Germany
Prior art keywords
taps
production
hardening
annealed
steel
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
DEH104688D
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.)
AEG AG
Original Assignee
AEG AG
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 AEG AG filed Critical AEG AG
Priority to DEH104688D priority Critical patent/DE480013C/en
Application granted granted Critical
Publication of DE480013C publication Critical patent/DE480013C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/48—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools threading tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatment Of Articles (AREA)

Description

Es ist bekannt, die bei der Bearbeitung (z. B. Schruppen) von Werkstücken aus Stahl entstehenden Spannungen vor dem Härten durch Ausglühen zu beseitigen. Ebenso ist es bekannt, daß die durch den Härteprozeß hervorgerufenen Formänderungen durch wiederholtes Ausglühen und Härten erheblich verringert werden können.It is known that when machining (e.g. roughing) workpieces made of steel to eliminate stresses that arise by annealing before hardening. It is the same known that the shape changes caused by the hardening process by repeated Annealing and hardening can be reduced significantly.

Da aber jede neue zur Verarbeitung kominende Stahlmenge, selbst wenn sie die gleiche Zusammensetzung wie die bisherige aufweist, häufig einen verschiedenen Härteverzug ergibt, so wird erfindungsgemäß bei der Herstellung von Gewindebohrern diese Ungleichmäßigkeit im Härteergebnis dadurch beseitigt, daß die Gewindebohrer bis auf einige Zehntehnillimeter Übermaß vorgeschnitten, dann geglüht, gehärtet, nochmals geglüht und dann endgültig ertig bearbeitet werden, wonach die normale Härtung bei der für jede Stahlsorte vorgeschriebenen Härtetemperatur erfolgt.But there is every new quantity of steel coming for processing, even if it is the same Composition like the previous one, often results in a different hardening delay, according to the invention, this unevenness becomes in the manufacture of taps Eliminated in the hardness result by keeping the taps down to a few tens of millimeters Pre-cut oversize, then annealed, hardened, annealed again and then final are finished, after which the normal hardening is prescribed for each type of steel Hardening temperature takes place.

Auf diese Weise wird die Unsicherheit in der Erzielung spannungs- und verzugsfreier Gewindebohrer behoben. Eine Fertigbearbeitung des Werkstückes nach der letzten endgültigen Härtung durch Schleifen ist bei diesem Verfahren also nicht erforderlich, wodurch eine wesentliche Kostenersparnis erzielt wird.In this way, the uncertainty in achieving tension-free and distortion-free taps is reduced Fixed. A finishing of the workpiece after the last final hardening by grinding is with this method therefore not necessary, which results in a substantial cost saving.

Claims (1)

Patentanspruch:Claim: Verfahren zur Herstellung von Gewindebohrern, dadurch gekennzeichnet, daß die Gewindebohrer bis auf einige Zehntelmillimeter Übermaß vorgeschnitten, dann geglüht, gehärtet, nochmals geglüht und dann fertig bearbeitet werden, wonach die normale Härtung erfolgt.Process for the production of screw taps, characterized in that the Taps pre-cut to a few tenths of a millimeter oversize, then annealed, hardened, annealed again and then finished, after which the normal Hardening takes place.
DEH104688D 1925-12-19 1925-12-19 Process for the production of taps Expired DE480013C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH104688D DE480013C (en) 1925-12-19 1925-12-19 Process for the production of taps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH104688D DE480013C (en) 1925-12-19 1925-12-19 Process for the production of taps

Publications (1)

Publication Number Publication Date
DE480013C true DE480013C (en) 1929-07-25

Family

ID=7169586

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH104688D Expired DE480013C (en) 1925-12-19 1925-12-19 Process for the production of taps

Country Status (1)

Country Link
DE (1) DE480013C (en)

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