Patent ID: 8201315
Filing Date: 2012-06-19
Classification: B25B,G01L,Y10T

Abstract:
1. A method for controlling tensile stress of a rod used for clamping a component having a passage issuing on the side of a bearing surface, wherein the rod is placed in said passage of the component and has a threaded end projecting on the side of the bearing surface the rod is extended in an axial direction and at least one retaining member is engaged on the threaded end of the rod until it comes into contact with the bearing surface of the component with its bearing face before the rod is released, such that the rod is blocked at the two ends of a useful clamping length defined as the length in which the residual clamping force persists with a residual clamping tensile force, wherein measurements are made which represent an elongation of the rod in a stretched state under a measured extension force and of the rod after release in relation to the rod before extension, by measuring a reference value before extension, a value during extension and a value after release by at least one sensor and comparing values supplied the sensor during extension and after release with a reference value supplied by this sensor before extension, and, on the basis of these data, a residual clamping force in the useful clamping length of the released rod after extension is calculated.