Welded ball pin, and method for the production thereof

Abstract

The invention relates to a welded ball pin (10) including a shaft (14; 14′) on which a completely closed ball (12) is welded, wherein the shaft (14; 14′) is configured as a hollow cylinder and an inner wall of the shaft (14′) is provided with grooves (24) extending parallel to a rotation axis of the shaft (14′).

Description

technical field [0001] The present invention relates to solder ball pins and to methods of their manufacture. Background technique [0002] Ball pins are preferably used where one or two components must be movably connected to each other. [0003] Ball pins generally include a ball and a shaft. For welded ball pins, the two parts, the ball and the shaft, are joined by a welding process. In the prior art, shafts are generally made from cylindrical bar stock, with balls welded to the shaft. Based on this geometry, prior art ball pins increase the stresses at the transition between the ball and the shaft and at the weld under alternating bending loads. Thus, in the prior art, there is an increased risk of weld fracture in the transition zone portion, which could lead to complete failure of the solder ball pin. [0004] For such ball pins, previous attempts have been made to prevent fracture of the weld between the ball and the shaft. Thus, for example, DE-OS 2300670 has pr...

AI Technical Summary

Problems solved by technology

[0005] However, this method has the disadvantage that the concentricity of the sphere is subsequently compromised due to the circumferential weld

However, this also increases complexity, especially when manufacturing the shaft, which has to be provided with individual curved surfaces, wherein also the respective different contact surfaces have to be manufactured when using spheres of different diameters

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