DE805340C - Process for chemical sharpening of blunt and worn tools - Google Patents

Process for chemical sharpening of blunt and worn tools

Info

Publication number
DE805340C
DE805340C DEP16761A DEP0016761A DE805340C DE 805340 C DE805340 C DE 805340C DE P16761 A DEP16761 A DE P16761A DE P0016761 A DEP0016761 A DE P0016761A DE 805340 C DE805340 C DE 805340C
Authority
DE
Germany
Prior art keywords
tool
tools
bath
blunt
lukewarm water
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
DEP16761A
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.)
PAUL LOJAK
Original Assignee
PAUL LOJAK
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 PAUL LOJAK filed Critical PAUL LOJAK
Priority to DEP16761A priority Critical patent/DE805340C/en
Application granted granted Critical
Publication of DE805340C publication Critical patent/DE805340C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/06—Sharpening files

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Description

Verfahren zum chemischen Schärfen von stumpfen und abgenutzten Werkzeugen Gegenstand der Erfindung ist ein Verfahren zum chemischen Schärfen von stumpfen und abgenutzten Werkzeugen, "vie Feilen, Raspeln, rotierenden Werkzeugen und Schneidwerkzeugen im allgemeinen.Process for chemical sharpening of dull and worn tools The invention relates to a method for chemical sharpening of blunt and worn tools, such as files, rasps, rotary tools, and cutting tools in general.

Gemäß der Erfindung verfährt man folgendermaßen: Das zu schärfende Werkzeug unterzieht man zunächst einer 'Torbehandlung, indem man es in einem alkalischen Bade von Fett und Rost befreit. Dieses Bad muß eine Temperatur von etwa 8o° C haben. Als besonders geeignet hat sich ein Bad von folgender Zusammensetzung erwiesen: iooo ccm Wasser, 125 g Ätznatron. Danach wird das entfettete und entrostete Werkzeug in lauwarmem Wasser gründlich abgebürstet und gelangt anschließend in ein 15 o/oiges Salzsäurebad, in welchem es 18 bis 20 Stunden verbleibt.According to the invention, the procedure is as follows: The tool to be sharpened is first subjected to a gate treatment by removing fat and rust from it in an alkaline bath. This bath must have a temperature of about 80 ° C. A bath with the following composition has proven to be particularly suitable: 100 cc of water, 125 g of caustic soda. The degreased and derusted tool is then thoroughly brushed off in lukewarm water and then placed in a 15% hydrochloric acid bath, in which it remains for 18 to 20 hours.

Hierauf wird es erneut in lauwarmem Wasser sorgfältig gebürstet. Nunmehr erfolgt die eigentliche chemische Schärfung in einem io- bis 15 %igen Salpetersäurebade. Die prozentuale Stärke des Bades und die Behandlungsdauer richten sich nach dem .Abnutzungsgrade des Werkzeugs.It is then carefully brushed again in lukewarm water. Now the actual chemical sharpening takes place in an io- to 15% nitric acid bath. The percentage strength of the bath and the duration of the treatment depend on the . Degree of wear of the tool.

Danach wird es wiederum in lauwarmem Wasser abgebürstet und kommt zum Schluß auf kurze Zeit in ein Neutralisationsbad, in welchem die letzten Säurespuren entfernt werden.Then it is brushed off again in lukewarm water and comes on Finally, briefly in a neutralization bath, in which the last traces of acid removed.

Das Werkzeug wird nun getrocknet, z. B. in warmer Luft, auf seine Brauchbarkeit geprüft und schließlich mit einem Rostschutzöl bestrichen.The tool is now dried, e.g. B. in warm air, on his Checked usability and finally coated with an anti-rust oil.

Bei rotierenden Werkzeugen werden diejenigen Flächen, welche von der Säure nicht angegriffen werden dürfen, mit einem Lacküberzuge versehen, der zum Schluß wieder entfernt wird.With rotating tools, those surfaces that are affected by the Acid must not be attacked, provided with a lacquer coating, which is used to Finally removed again.

Die chemische Schärfung bietet Gewähr dafür, daß Profil, Schnittwinkel und Verzahnung in ihrer Form erhalten bleiben. Härtefehler und Verkrümmungen, wie sie bei der bisher üblichen Schärfung oft unvermeidlich sind, können nicht vorkommen.The chemical sharpening guarantees that the profile, cutting angle and teeth are retained in their shape. Hardness errors and distortions, how they are often unavoidable with the hitherto customary sharpening, cannot occur.

Ein weiterer Vorteil des neuen Verfahrens besteht darin, daß die Maße erhalten bleiben. Die Werkzeuge können daher- mehrmals geschärft werden, bevor eine mechanische Bearbeitung nötig wird. Schließlich wird auch die Lebensdauer chemisch geschärfter Werkzeuge um ein Vielfaches erhöht. Wissenschaftliche Untersuchungen haben gezeigt, daß dieLeistungsfähigkeit chemisch geschärfter Werkzeuge bis zu 9o °/o derjenigen neuer Werkzeuge beträgt. Dieser Umstand ist bei dem derzeitigen Rohstoffmangel, insbesondere an Werkze@gstählen, von ganz besonderer Bedeutung.Another advantage of the new method is that the dimensions remain. The tools can therefore be sharpened several times before a mechanical processing becomes necessary. Ultimately, the service life also becomes chemical sharpened tools increased many times over. Scientific investigations have shown that the performance of chemically sharpened tools up to 9o ° / o that of new tools. This fact is with the current shortage of raw materials, especially on tool steels, of particular importance.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zum chemischen Schärfen von stumpfen und abgenutzten Werkzeugen, wie Feilen, Raspeln, rotierenden Werkzeugen und Schneidwerkzeugen im allgemeinen, dadurch gekennzeichnet, daB das zu schärfende Werkzeug zunächst in einem auf 8o° C erhitzten, eine fett- und rostlösende Substanz enthaltenden Bade behandelt, sodann in lauwarmem Wasser abgebürstet und nunmehr in einem 15 o/oigen Salzsäurebade 18 bis 2o Stunden belassen und nach erneutem Bürsten in lauwarmem Wasser in einer 1o- bis 15 o/oigen Salpetersäurelösung weiterbehandelt wird, deren prozentuale Stärke sich nach demAbnutzungsgrade desWerkzeuges richtet, worauf man das Werkzeug erneut mit lauwarmem Wasser abbürstet und nach Neutralisierung der letzten Säurespuren einer Trocknung, z. B. in warmer Luft, unterzieht. PATENT CLAIMS: i. Process for the chemical sharpening of blunt and worn tools, such as files, rasps, rotating tools and cutting tools in general, characterized in that the tool to be sharpened is first treated in a bath heated to 80 ° C and containing a fat- and rust-dissolving substance brushed off in lukewarm water and then left in a 15% hydrochloric acid bath for 18 to 20 hours and, after brushing again in lukewarm water, further treated in a 10 to 15% nitric acid solution, the strength of which depends on the degree of wear and tear of the tool Brush the tool again with lukewarm water and, after neutralizing the last traces of acid, dry it, e.g. B. in warm air. 2. Verfahren nach Anspruch i, darin bestehend, daß die Entfettung und Entrostung des Werkzeuges in einem Bade von folgender Zusammensetzung vorgenommen wird: iooo ccm Wasser, 125 g Ätznatron.2. Procedure according to claim i, consisting in that the degreasing and derusting of the tool is made in a bath of the following composition: 100 cc of water, 125 g caustic soda.
DEP16761A 1948-10-02 1948-10-02 Process for chemical sharpening of blunt and worn tools Expired DE805340C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP16761A DE805340C (en) 1948-10-02 1948-10-02 Process for chemical sharpening of blunt and worn tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP16761A DE805340C (en) 1948-10-02 1948-10-02 Process for chemical sharpening of blunt and worn tools

Publications (1)

Publication Number Publication Date
DE805340C true DE805340C (en) 1951-05-15

Family

ID=7366196

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP16761A Expired DE805340C (en) 1948-10-02 1948-10-02 Process for chemical sharpening of blunt and worn tools

Country Status (1)

Country Link
DE (1) DE805340C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0797512A1 (en) * 1994-12-15 1997-10-01 Anthony J. Tumminaro, Jr. Solution and process for chemically resharpening smoothing tools, forming tools, and cutting tools

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0797512A1 (en) * 1994-12-15 1997-10-01 Anthony J. Tumminaro, Jr. Solution and process for chemically resharpening smoothing tools, forming tools, and cutting tools
EP0797512A4 (en) * 1994-12-15 1998-04-15 Anthony J Tumminaro Jr Solution and process for chemically resharpening smoothing tools, forming tools, and cutting tools

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