초록 ▼

A system for first setting a blind rivet and then verifying the correctness of the set comprising a rivet setting tool to set the rivet and computer logic to verify the correctness of the set. The setting tool includes a jaw assembly for holding the stem of the rivet\s mandrel fitted to an axially m

A system for first setting a blind rivet and then verifying the correctness of the set comprising a rivet setting tool to set the rivet and computer logic to verify the correctness of the set. The setting tool includes a jaw assembly for holding the stem of the rivet\s mandrel fitted to an axially movable pulling shaft. Both the pulling force of the setting tool and the displacement of the pulling shaft are measured and the measurements are interpreted by an integrator to determine the total energy of the setting process. The determined total energy is then compared with an ideal total energy to assess whether or not the set of the particular rivet is acceptable. Other quantitative comparisons may be made against other ideal values.

대표청구항 ▼

A system for setting a blind rivet and evaluating the acceptability of the set, said rivet being of the type having a frangible tubular body and an elongated mandrel that includes an enlarged head and a stem extending rearwardly of the head and through said frangible tubular body, said system compri

A system for setting a blind rivet and evaluating the acceptability of the set, said rivet being of the type having a frangible tubular body and an elongated mandrel that includes an enlarged head and a stem extending rearwardly of the head and through said frangible tubular body, said system comprising: a blind rivet setting tool, said tool including a body, said body having a long axis, said tool having a mandrel engaging mechanism for engaging said stem of said mandrel, said engaging mechanism being reciprocable in the axial direction along said long axis of said body, said tool further including force applying means for acting on said engaging mechanism to forcibly move said mechanism in said axial direction to cause the head of the mandrel to deform the tubular body and create a secondary head and to thereafter break the stem of the mandrel from the head and complete the rivet setting process; a first transducer operatively associated with said tool for measuring the force applied by said force applying means to move said engaging mechanism and producing a force output signal related thereto; a second transducer operatively associated with said tool for measuring the movement of said engaging mechanism in said axial direction and producing a displacement output signal related thereto; and a control circuit for receiving said force output signal and said displacement output signal and determining therefrom the total energy used during the rivet setting process and comparing said determined total energy with a predetermined desired value.