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Parts assembly using signature analysis

  • US 4,855,923 A
  • Filed: 01/06/1988
  • Issued: 08/08/1989
  • Est. Priority Date: 01/06/1988
  • Status: Expired due to Term
First Claim
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1. A method of assembling parts, including the steps of:

  • sensing, at discrete time intervals before actual assembly of the parts, forces exerted on the parts corresponding to a good assembly and a faulty assembly;

    processing statistically the sensed forces to determine waveforms corresponding to the forces associated with a good assembly and the forces associated with a faulty assembly;

    detecting, at discrete time intervals, forces exerted on the parts during the actual assembly of the parts;

    processing statistically the detected forces to determine waveforms of the forces used during actual assembly of the parts;

    comparing the waveforms of the forces used during actual assembly of the parts to the waveforms corresponding to the forces associated with a good assembly and a faulty assembly to classify the waveforms of the forces used during actual assembly of the parts as those associated with a good assembly or those associated with a faulty assembly.

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