DE102009038001A1 - Producing a switching rod by joining a round material or a tube with switching fingers, which are optimized in the geometry for a resistance welding process and are simultaneously or consecutively welded with the solid material or tube - Google Patents

Abstract

The method for producing a switching rod by joining a round material or a tube with switching fingers, which are optimized in the geometry for a resistance welding process and are simultaneously or consecutively welded with the solid material or tube, is claimed. The welding process takes place by capacitor discharge- or medium frequency welding, in which process-typical welding projections are fixed at the welding finger or shaft (solid- or raw material). The welding projections required for the capacitor discharge welding are formed, punched, stamped or introduced on the switching finger. The method for producing a switching rod by joining a round material or a tube with switching fingers, which are optimized in the geometry for a resistance welding process and are simultaneously or consecutively welded with the solid material or tube, is claimed. The welding process takes place by capacitor discharge welding or medium frequency welding, in which the process-typical welding projections are fixed at the welding finger or shaft (solid- or raw material). The welding projections required for the capacitor discharge welding are formed, punched, stamped or introduced on the switching finger. The welding projections required for the capacitor discharge welding or medium frequency welding are formed, punched, stamped or introduced on the shaft.

Description

The The present invention relates to a novel process for the preparation a shift shaft z. For example Motor vehicle. The object is, in a particularly cost-effective manner To produce a switching shaft, the highest demands on shape and position tolerances having.

State of the art:

The Shift fingers are common designed as complex, difficult to shape forgings, which consuming have to be machined mechanically to be used as a shift finger. Next must the Shift shaft and the shift fingers are elaborately aligned, before they can be pinned and bolted together. Height Costs are caused by the time-consuming machining, alignment and the assembly of the components, which finally assembled again in the Condition must be machined mechanically.

Patent Idea:

• – Gewichtsreduktion, somit Einsparungen beim Treibstoffverbrauch
• – Materialeinsparung
• – Zeiteinsparung bei der Montage
• – Zeiteinsparung bei der Zerspanung

The aim of the invention is the cost-effective production of a switching shaft with the following special properties:

• - Weight reduction, thus savings in fuel consumption
• - Material savings
• - Time savings during assembly
• - Time savings during machining

• – Angepasste Geometrie der Schaltfinger für einen Hochtemperaturfügevorgang (Schweißen). Speziell für das Widerstandsschweißen wurden die Schweißbuckelgeomtrien in das Stanzbiegeteil eingearbeitet.
• – Diese Schweißbuckel erzeugen die, für das Widerstandsschweißen nötigen, Querschnittsverengungen und führen zum Aufschmelzen des Fingers und der Welle.
• – Die benötigten Finger werden in einem Spezialschweißwerkzeug Form- und Lagerichtig in die Unterelektrode eingelegt. Die Welle wird in die Schweißbuckel der Schaltfinger eingelegt und über einen Positionsstift ausgerichtet. Anschließend wird die Welle mit der großflächigen Oberelektrode kontaktiert.
• – Nach Überprüfung aller relevanten Parameter durch die Schweißsteuerung erfolgt die Schweißung.

For this purpose, the following requirements are placed on the new procedure:

• - Adapted geometry of the shift fingers for a high-temperature joining process (welding). Especially for resistance welding, the weld bump geometries were incorporated into the stamped and bent part.
• - These weld bumps produce the necessary for the resistance welding, cross-sectional constrictions and lead to the melting of the finger and the shaft.
• - The required fingers are placed in a special welding tool, form and storage correctly in the lower electrode. The shaft is inserted into the welding bumps of the shift fingers and aligned via a position pin. Subsequently, the shaft is contacted with the large-area top electrode.
• - After checking all relevant parameters by the welding control, the welding takes place.

To Patentieren is the idea, the shift shaft with the shift fingers on a welding to add as well as the geometry of the shift finger, for a resistance welding process were optimized.

Claims (5)

A method for producing a shift rod by Add one Round material or even a tube with at least one shift finger, in geometry for a resistance welding was optimized. Method according to claim 1, characterized in that that several shift fingers at the same time or in succession with the Solid material or pipe to be welded. Method according to one of the preceding claims, characterized characterized in that the welding process done by capacitor discharge welding or medium frequency welding, either at the welding finger or on the shaft (solid or tubular material) the process-typical welding hump are attached. Method according to one of the preceding claims, characterized marked that for the capacitor discharge welding necessary weld hump molded on the shift fingers, stamped, punched out or otherwise are introduced. Method according to claims 1-3, characterized that for the capacitor discharge welding or medium frequency welding necessary weld hump on the shaft (full or pipe material) molded, stamped, stamped or are introduced elsewhere.

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