Patent ID: 7726542
Filing Date: 2010-06-01
Classification: B23K,B29C,B29K,Y10T

Abstract:
1. A method for welding a cylinder and a disc using a spin-welding process, the method comprising: providing the disc with a circumferential groove forming an annular shelf, and with a plurality of inwardly-projecting teeth; rotating the cylinder with respect to the disc under a first axial force during the spin-welding process to thereby form molten flash; moving the molten flash underneath the annular shelf and at least partially into the circumferential groove, including moving the molten flash into enveloping contact with the teeth; and cooling the molten flash to thereby form a weld joint between the cylinder and the disc, and to thereby form a flow pattern; wherein the flow pattern forms a first and a second interlocking feature between the annular shelf of the disc and the cylinder, the first interlocking feature being suitable for preventing axial motion of the cylinder with respect to the disc independently of the weld joint, and the second locking feature preventing a relative rotation of the cylinder with respect to the disc.