Apparatus for preventing step-edge shearing during ultrasonic we

Details Apparatus for preventing step-edge shearing during ultrasonic we Apparatus for preventing step-edge shearing during ultrasonic we

1983-04-12

1985-06-25

Ramsey, Kenneth J.

Metal fusion bonding

Means to apply vibratory solid-state bonding energy to work

156 731, B23K 2010

Patent

active

045248982

ABSTRACT:
Ultrasonic vibratory spot welding apparatus is provided, said apparatus being of the type including a welding tip adapted to introduce into and through at least two workpieces high frequency vibratory energy so as to effect a spot weld therebetween. A complimentary anvil is also provided and so positioned relative to said welding tip so as to define a throat therebetween between which the workpieces are adapted to be inserted for spot welding. Means are provided about either or both the welding tip and the anvil for preventing step shearing during the welding operation, said means comprising a shield positioned about the welding tip and/or the anvil. The shield preferably includes an inner and an outer layer, said inner layer being fabricated from either an organic material or a plurality of metallic materials. The outer layer, which is fixedly attached to either the welding tip and/or the anvil, is fabricated from a metallic material which has modulus lower than the modulus of steel. In actual operation, the shield serves to provided coaxial pressure to the workpieces during the welding operation thereby preventing step shearing at the point of weld.

REFERENCES:
patent: 3586122 (1971-06-01), Jacke
patent: 4249986 (1981-02-01), Obeda
patent: 4406720 (1983-09-01), Wang et al.

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