Method and apparatus for joining metal workpieces using high frequency vibratory energy
Quality control method for inertial welding Patent #: 4067490
ApplicationNo. 06/484244 filed on 04/12/1983
US Classes:228/102, With condition responsive, program, or timing control228/111With treating other than heating
ExaminersPrimary: Ramsey, Kenneth J.
Attorney, Agent or Firm
International ClassesB23K 20/10 (20060101)
B29C 65/02 (20060101)
B29C 65/08 (20060101)
AbstractA method of progressively ultrasonically welding together workpieces is provided wherein the spot welds effected are initiated as small points and then progressively grow to full size. The method employs an ultrasonic welding apparatus of the type having a welding tip and a complimentary anvil between which the workpieces to be welded may be inserted. The workpieces are first clamped together and the workpieces "presqueezed" to disperse any adhesives which may be used between the workpieces. Initial pressure and energy levels are then introduced to "scrub" the workpieces. Pressure and energy are then synchronously ramped in phase to maximum levels to effect a weld between the workpieces. The welding operation is controlled by control means which permit automatic synchronization of the operation.