DE102004045436B3 - Process to harden the rim of a double-walled metal rim, e.g. steering wheel column, by heating, quenching, tempering and alternating current induction circuit - Google Patents
Process to harden the rim of a double-walled metal rim, e.g. steering wheel column, by heating, quenching, tempering and alternating current induction circuit Download PDFInfo
- Publication number
- DE102004045436B3 DE102004045436B3 DE102004045436A DE102004045436A DE102004045436B3 DE 102004045436 B3 DE102004045436 B3 DE 102004045436B3 DE 102004045436 A DE102004045436 A DE 102004045436A DE 102004045436 A DE102004045436 A DE 102004045436A DE 102004045436 B3 DE102004045436 B3 DE 102004045436B3
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- Germany
- Prior art keywords
- edge
- rim
- conductor
- heating
- alternating current
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Härten von Rändern von Vertiefungen aufweisenden, induktiv härtbaren metallischen Gegenständen, sowie nach diesem Verfahren hergestellte Produkte.The The present invention relates to a method of curing edges indentation, inductive hardenable metallic objects, as well as Products made by this process.
Beim Härten werden Stahlteile auf z.B. über 900°C erwärmt und anschließend abgeschreckt, wobei die gewünschten martensitischen Gefügeumwandlungen auftreten. Danach werden die Teile durch moderates Erwärmen angelassen.At the hardening Steel parts are placed on e.g. heated above 900 ° C and subsequently quenched, with the desired martensitic microstructure transformations occur. Thereafter, the parts are tempered by moderate heating.
In
der
Abgesehen davon, dass damit der Rand um die Vertiefung der Verbundlenkerachse nicht härtbar ist, besteht bei einer derartigen Vorgehensweise bei der Härtung von Verbundlenkerachsen die Gefahr, dass an den Innenbereichen, wo die obere, nach unten gestauchte Phase an der unteren anliegt oder dieser nahe ist, eine Verschweißung durch das Erwärmen auftritt, die bei (mehrfacher) Verwindung zu Rissbildung führen kann, da hier die beiden Blechsegmente nicht mehr aneinander gleiten können, was beim Abreißen der Verschweißung zu Kerbwirkung führt. Ferner ist der obere Rand der rinnenförmigen Vertiefung ungehärtet einer durch die Formgebung bedingten erhöhten Verletzungsgefahr ausgesetzt, plastische Verformung an diesem eine Kante darstellenden empfindlichen Bereich führt ebenfalls zu leichterer Kerbbildung als in dem mechanisch stabileren Mantel.apart of that with it the edge around the depression of the torsion beam axle is not curable, consists in such a procedure in the curing of Twisted-beam axles pose the danger of being on the interior areas where the upper, down-compressed phase is applied to the lower or this close, a weld by heating occurs, which can lead to cracking (multiple) twisting, because here the two sheet metal segments can no longer slide together, which when tearing off the welding leads to notch effect. Furthermore, the upper edge of the channel-shaped depression is uncured one exposed by the shaping increased risk of injury, plastic deformation on this one edge representing sensitive Area leads also to easier kerf formation than in the mechanically more stable Coat.
Die vorliegende Erfindung hat sich daher die Aufgabe gestellt, ein Verfahren zu schaffen, nach welchem Vertiefungen aufweisende Gegenstände allein in ihrem Randbereich härtbar sind, insbesondere sollen damit Verbundlenkerachsen ohne die Gefahr einer inneren Verschweißung an den einander nahen Bereichen herstellbar sein, die modifizierte Eigenschaften aufweisen.The The present invention is therefore based on the object, a method to create, after which wells having objects alone curable in its edge region are, in particular, so that twist-beam axles without the risk of internal welding be produced at the close areas, the modified Have properties.
Die Lösung dieser Aufgabe gelingt bei einem Verfahren zum Härten von doppelwandigen Rändern von metallischen Vertiefungen durch Erwärmen, Abschrecken und ggf. Anlassen, wobei man beidseits des Randes und nahe diesem einen stromdurchflossenen, wassergekühlten Induktionsleiter derart verlegt und mit Wechselstrom beaufschlagt, dass die Stromlaufrichtung außen und innen je gleich sind.The solution This object is achieved in a method for curing double-walled edges of metallic depressions by heating, quenching and possibly Tempering, wherein on both sides of the edge and near this one current-carrying, water-cooled Induction conductor laid in such a way and charged with alternating current, that the current direction is outside and inside are the same.
Die gekühlten Stromleiter sind dabei nahe dem inneren und äußeren Rand vorzugsweise so verlegt, dass die Stromlaufrichtung sich gegenüber der Außenseite an der Innenseite umkehrt, d.h. der Leiter ist hier zurückgeführt. Die Leiter sind dabei mäanderförmig angeordnet und an den gegenüberliegenden Enden der Vertiefungen herausgeführt. Eine solche Anordnung eröffnet die Möglichkeit, z.B. beidseitig Stromleiterpaare anzuordnen, die dann je Seite gleiche Stromlaufrichtungen aufweisen. Dies ist deshalb von besonderer Bedeutung, da sonst eine Aufheizung auf die für die Martensitbildung erforderlichen ca. 950° nicht erreicht wird, wobei die umgebogenen Ränder die an sich auftretenden entgegengerichteten Felder abschirmen.The cooled Conductors are preferably laid near the inner and outer edges, that the current direction is opposite to the outside on the inside reverses, i. the ladder is returned here. The ladder is here arranged meandering and to the opposite Ends of the wells led out. Such an arrangement opens the possibility, e.g. arrange pairs of conductors on both sides, which are then the same on each side Have current directions. This is therefore of particular importance otherwise heating up to the required for the martensite about 950 ° not is reached, wherein the bent edges which occur in itself Shield opposing fields.
Die Kupfer-Stromleiter besitzen vorteilhaft einen rechteckigen, z. B. quadratischen Querschnitt, wodurch sie den zu erwärmenden Rändern relativ große Flächen zukehren.The Copper conductor advantageously have a rectangular, z. B. square cross section, causing them to be heated edges relatively large surfaces return.
Es kann vorteilhaft sein, insbesondere bei den oben erwähnten Verbundlenkerachsen, die eine gestreckte Form aufweisen, auch die Kehle an den inneren Enden der Vertiefung zu härten. Dazu wird vorgeschlagen, die Stromleiter entsprechend tief aus den Muldenkehlen herauszuführen.It may be advantageous, in particular in the case of the above-mentioned composite link axles, which have a stretched shape, including the throat at the inner ends to harden the depression. For this purpose, it is proposed that the current conductor correspondingly deep from the Lead out Muldenkehlen.
Erfindungsgemäß ist es auch möglich, die Härtung der Randbereiche zu modifizieren, beispielsweise dadurch, dass die Stromleiter längs der Ränder nicht linear, sondern bogenförmig verlaufen, beispielsweise mittig leicht herabgezogen werden. Schreckt man einen derartig erwärmten Gegenstand ab, so entsteht ein entsprechendes gehärtetes Profil.It is according to the invention also possible, the hardening the edge areas to modify, for example, that the Current conductor along the edges not linear, but curved run, for example, be pulled down slightly in the middle. scares you have such a heated Subject from, so creates a corresponding hardened profile.
Anhand der beiliegenden Figuren wird die vorliegende Erfindung näher erläutert. Dabei zeigenBased The enclosed figures, the present invention will be explained in more detail. there demonstrate
Die
erfindungsgemäße Verbundlenkerachse
Neben
den Mänteln
Vorteilhaft
ist bei einer solchen Anordnung, dass der mäanderförmig verlaufende Stromleiter
Die
Leiter
Der Stahlmantelrand wird innerhalb von 15 Sekunden auf 950 °C aufgeheizt, für 60 Sekunden zum Temperaturausgleich bei dieser Temperatur gehalten, um dann innerhalb von 10 Sekunden abzuschrecken.Of the Steel jacket edge is heated to 950 ° C within 15 seconds, for 60 Seconds to keep the temperature at this temperature, to quench within 10 seconds.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004045436A DE102004045436B3 (en) | 2004-09-18 | 2004-09-18 | Process to harden the rim of a double-walled metal rim, e.g. steering wheel column, by heating, quenching, tempering and alternating current induction circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004045436A DE102004045436B3 (en) | 2004-09-18 | 2004-09-18 | Process to harden the rim of a double-walled metal rim, e.g. steering wheel column, by heating, quenching, tempering and alternating current induction circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004045436B3 true DE102004045436B3 (en) | 2006-03-23 |
Family
ID=36001820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004045436A Expired - Fee Related DE102004045436B3 (en) | 2004-09-18 | 2004-09-18 | Process to harden the rim of a double-walled metal rim, e.g. steering wheel column, by heating, quenching, tempering and alternating current induction circuit |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102004045436B3 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1160108B1 (en) * | 2000-05-31 | 2003-08-06 | Benteler Ag | Twist beam axle |
-
2004
- 2004-09-18 DE DE102004045436A patent/DE102004045436B3/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1160108B1 (en) * | 2000-05-31 | 2003-08-06 | Benteler Ag | Twist beam axle |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20140401 |