Displacement monitoring system for stud welding
Patent 5406044 Issued on April 11, 1995. Estimated Expiration Date: 
April 20, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 20, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesLarge diameter stud and method and apparatus for welding same Apparatus for controlling a welding tool Electric stud-welding device Interactive stud welding gun Apparatus for welding a stud to a workpiece Controller for a stud welding machine Patent #: 5317123 InventorsApplicationNo. 230275 filed on 04/20/1994US Classes:219/99, Methods219/98StudExaminersPrimary: Shaw, Clifford C.Attorney, Agent or FirmInternational ClassB23K 009/20AbstractA system (10) and method for predicting weld quality in a stud welding system by measuring the displacement of a movable shaft (20) with respect to the gun body (12) during the weld process. A sensor (34) is positioned with respect to the welding system in order to produce a series of discrete signal values each indicative of this displacement. These values are plotted graphically and used to produce a weld "signature" which can be compared with signatures of welds of known quality to more accurately predict the quality of the current weld. Based on these weld signatures, various weld parameters including current, time and lift can then be adjusted until a consistent signature indicative of good weld quality is produced. | |
