Fastening apparatus with interchangeable programmable inserts

1. Electronic apparatus for controlled fastening, comprising a body ( 11 ) coupled to which is one of different removable inserts ( 17 , 17 ′, 17 ″), each of which is intended to be engaged onto a corresponding type of mechanical member on which the apparatus is intended to operate, and further comprising a sensor ( 20 ) for detecting a torque exerted onto the mechanical member and which emits an information signal transmitted to calculation, means ( 22 ) to obtain, from the signal emitted by the sensor, significant parameters of an action of the apparatus on the mechanical member, mounted on each insert being a transponder ( 18 ) which, when activated, sends signals and present in the body being reception means ( 19 , 23 ) for receiving such signals transmitted by the transponder of the insert coupled to the body and sending them to the calculation means ( 22 ) to influence calculation of said significant parameters for the operation of the apparatus and/or to provide control for presets of operating parameters of the apparatus, the apparatus further comprising in the body, means ( 19 , 24 ) for sending programming information signals to the transponder ( 18 ) and the transponder comprising means ( 25 , 26 ) for receiving such signals and storing them in its memory ( 27 ) as part of signals to be transmitted, characterized in that the means ( 19 , 24 ) for sending programming information signals to the transponder ( 18 ) are connected to the calculation means ( 22 ) for receiving operative parameters obtained by the calculation means ( 22 ) according to the information signals emitted by the torque detection sensor ( 20 ), sending such operative parameters to the insert ( 17 ) and storing them in a memory ( 27 ) thereof.

2. Apparatus according to claim 1 , characterized in that the signals comprise an insert identification code.

3. Apparatus according to claim 1 , characterized in that the signals comprise coefficients for correcting the information signals emitted by the torque detection sensor ( 20 ).

4. Apparatus according to claim 1 , characterized in that it comprises a rotation angle sensor ( 21 ) capable of emitting angle information signals towards the calculation means and in that the signals sent by the insert comprise coefficients for correcting the information signals emitted by the angle sensor.

5. Apparatus according to claim 1 , characterized in that the apparatus is in the form of a manually controlled electronic fastening wrench and the significant parameters are shown on a display ( 14 ) on the wrench.

6. Method for setting, depending on the inserted insert, an electronic fastening apparatus for controlled fastening with interchangeable inserts provided with a transponder, comprising:

a first preparation step wherein the insert is mounted on the apparatus and the apparatus stores desired setting parameters in the transponder held in the insert;

a subsequent employment step wherein, when an insert in which the setting parameters are stored is mounted on the apparatus, the transponder in the insert transmits the stored parameters to the apparatus in such a manner that they are used by the apparatus during the use with that specific insert.

7. Method according to claim 6 , wherein in the employment step the parameters transmitted by the transponder are sent to calculation means in the apparatus to use them, when using the apparatus with that insert, to influence the calculation of significant parameters for the operation of the apparatus and/or to provide control for the presets of operating parameters of the apparatus.

8. Method according to claim 6 , wherein in the preparation step, after mounting the insert on the apparatus, the apparatus is used in preset test conditions, controlling the detection and calculation—by the apparatus—of the significant parameters of the action of the apparatus subjected to the test conditions, the apparatus storing in the transponder held in the insert setting parameters calculated according to the differences between the significant parameters detected by the apparatus and the significant parameters expected with the test conditions applied.

9. Method according to claim 6 , wherein the setting parameters stored by the apparatus in the transponder of the insert during the preparation step comprise a code for identifying the specific insert and/or the significant parameters detected by the apparatus comprise torque and/or fastening angle information.