DE881288C - Process for the production of hard chrome plated stopcock plugs - Google Patents
Process for the production of hard chrome plated stopcock plugsInfo
- Publication number
- DE881288C DE881288C DER4045D DER0004045D DE881288C DE 881288 C DE881288 C DE 881288C DE R4045 D DER4045 D DE R4045D DE R0004045 D DER0004045 D DE R0004045D DE 881288 C DE881288 C DE 881288C
- Authority
- DE
- Germany
- Prior art keywords
- hard chrome
- plugs
- stopcock
- production
- chrome plated
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/062—Construction of housing; Use of materials therefor of taps or cocks with conical plugs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
- Chemically Coating (AREA)
Description
Bei der Hartverchromung von Hahnküken läßt es sich mit bekannten technischen Mitteln nicht vermeiden, daß der an sich sehr dünne Hartchromizberzug an den Ringkanten der Stirnflächen des Knikens und in deren Nähe infolge der höheren Stromdichte an ,diesen Stellen zu dick wird: Insbesondere hat sich auch das Abwölben dieser Ringkanten als erfolglos erwiesen. Zur Beseitigung der zu dicken Stellen des Chromüberzugs ist deshalb eine Nachbearbeitung unentbehrlich, weil das Küken sonst nicht hinreichend dicht sitzt. Die bekannte Methode des Abschleifens des Hartchromüberz.ugs, soweit er zu .dick ausgefallen ist, hat den Mangel, daß .der Hartchromüberzug an den nachbearbeiteten Stellen sehr leicht abblättert. Insbesondere sind diese Stellen gegen selbst leichte mechanische Einwirkungen sehr empfindlich. Zum Beispiel blättert der Hartchromilberzug an diesen Stellen schon beim Herauslegen des Kükens (etwa zu Reinigungszwecken) gern ab.With the hard chrome plating of cock plugs it can be done with known technical Means do not avoid that the hard chrome plating, which is very thin per se, on the ring edges the front surfaces of the knee and in their vicinity due to the higher current density , these areas become too thick: In particular, the bulging of these ring edges has also become proved unsuccessful. To remove the excessively thick areas of the chrome coating Post-processing is therefore essential, because otherwise the chick will not be sufficient sits tight. The well-known method of grinding off the hard chrome coating, so far it has turned out too thick, has the defect that .the hard chrome coating on the reworked Places peeled off very easily. In particular, these spots are easy against themselves mechanical influences very sensitive. For example, the hard chrome silver slide is peeling at these points when laying out the chick (e.g. for cleaning purposes) gladly from.
Die Erfindung beseitigt diesen Mangel dadurch, daß die nachzubearbeitenden Ringkanten samt der Unterlage (d. h. dem Metall, aus dem das Küken eigentlich besteht) so weit konisch abgedreht werden, als zur Beseitigung der zu dicken Stellen des; Chromüberzugsi erforderlich ist. Welcher Stellen zu dick. sind, läßt sich mit bekannten Mitteln erkennbar machen.The invention eliminates this deficiency in that the to be reworked Ring edges and backing (i.e. the metal the chick is actually made of) be turned off conically as far as to remove the excessively thick parts of the; Chrome plating is required. Which places too thick. are, can be with known Make means recognizable.
Durch -dieses konische Abdrehen wird erreicht, daß der verbleibende Teil des, Hartchroimüb@erz.ugs unbearbeitet bleibt und daher nicht zum Abblättern neigt. Es wird ferner erreicht, daß der gegen mechanische Einwirkungen empfindlichste Außenrand des Hartchromilberzugs gegen solche mechanische Einwirkungen geschützt ist, weil er infolge der konischen Abschrägung tiefer . liegt als die Kükenmantelfläche.-This conical turning is achieved that the remaining Part of the, Hartchroimüb@erz.ugs remains unedited and therefore not peeled off tends. It is also achieved that the most sensitive to mechanical influences The outer edge of the hard chrome silver coating is protected against such mechanical influences is because it is deeper due to the conical bevel. lies than the outer surface of the chick.
Es wird endlich erreicht, daß die albgedrehten Flächen, in denen eben die empfindlichen Außenränder des Härtchromilberzugs liegen, mit einer Schutzschicht überzogen werden können.It is finally achieved that the twisted surfaces in which flat the sensitive outer edges of the hard chrome silver coating are covered with a protective layer can be coated.
Die Zeichnung zeigt ein Küken vor und ein Küken nach her Nachbearbeitung.The drawing shows a chick before and a chick after post-processing.
Ga ist der Kükenkörper, b seine Stirnflächen, c die Kükenachse. Die Stirnflächen b werden vor der Hartverchromung zweckmäßigerweise in an sich bekannter Weise mit Laok abgedeckt, um die -unvermeidbare Verdickung des Chromüberzugs an den Ringkanten der Stirnflächen möglichst gering zu halten. Nach erfolgter Verchromung werden die Rin" Ganten d konisch abgedreht, so daß an ihrer Stelle Kegelmantelflächen e entstehen, innerhalb deren die Außenränder des Chromüberzugs liegen.Ga is the plug body, b its end faces, c the plug axis. Before the hard chrome plating, the end faces b are expediently covered with laok in a manner known per se in order to keep the unavoidable thickening of the chrome coating on the ring edges of the end faces as low as possible. After the chrome plating has taken place, the rings "Ganten d" are turned off conically, so that conical lateral surfaces e arise in their place, within which the outer edges of the chrome coating lie.
Diese Kegelmantelflächen können mit einem weiteren Schutzüberzug (auf mechanischem oder galvani:s,chem Wege) versehen werden;.These conical surfaces can be covered with a further protective coating (on mechanical or galvanic: s, chemical ways).
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER4045D DE881288C (en) | 1939-06-06 | 1939-06-06 | Process for the production of hard chrome plated stopcock plugs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER4045D DE881288C (en) | 1939-06-06 | 1939-06-06 | Process for the production of hard chrome plated stopcock plugs |
Publications (1)
Publication Number | Publication Date |
---|---|
DE881288C true DE881288C (en) | 1953-06-29 |
Family
ID=7396534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER4045D Expired DE881288C (en) | 1939-06-06 | 1939-06-06 | Process for the production of hard chrome plated stopcock plugs |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE881288C (en) |
-
1939
- 1939-06-06 DE DER4045D patent/DE881288C/en not_active Expired
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