×

Method and apparatus for determining an evaluation time interval and method and apparatus for assessing the quality of a spot weld based on a variation in temperature in the evaluation time interval

  • US 5,721,415 A
  • Filed: 02/26/1996
  • Issued: 02/24/1998
  • Est. Priority Date: 08/24/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for ascertaining an evaluation time interval for assessing the quality of a spot weld on the basis of a course of temperature over time at the spot weld, which comprises:

  • a) determining a respective course over time of a variable, the variable being associated with temperature for a plurality of reference spot welds, wherein the reference spot welds each have a different quality, and the quality of the associated reference spot weld is associated with each course over time of the variable; and

    b) determining a time interval in which the courses over time of the variable are different from one another as the evaluation time interval, wherein the variable for each course over time has a different mean value, and the mean values are a monotonic function of the quality associated with each course.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×