Method of assembling a connecting device on a stripped end section of an electric cable and assembly comprising such a device securely assembled on such a section of cable

Method of assembling a connecting device (3) on a stripped end section (6) of an electric cable (4), said connecting device (3) comprising a conducting element (7) having a tubular portion (13) and an insertion opening (16) through which it is intended to introduce said stripped end section (6) into said tubular portion (13), said method comprising the steps of:

• supplying a said connecting device (3) and a said electric cable (4);
• introducing said stripped end section (6) into said tubular portion (13) via said insertion opening (16);
• securely assembling said tubular portion (13) on said stripped end section (6);
• said method being wherein said step of securely assembling comprises:
• a first step of crimping a first zone (40) of said tubular portion (13) with a first portion (43) of said stripped end section (6) that is located in said first zone (40), which first zone (40) being farthest from said insertion opening (16), said first crimping step being configured so that said first crimped portion (43) of said stripped end section (6) has a first predetermined degree of compression;
• a second step of crimping a second zone (41) of said tubular portion (13) with a second portion (44) of said stripped end section (6) that is located in said second zone (41), which second zone (41) being closest to said insertion opening (16), said second crimping step being configured so that said second portion (44) of said stripped end section (6) has a second predetermined degree of compression lower than said first predetermined degree of compression;
• a step of punching a third zone (42) of said tubular portion (13) with a third portion (56) of said stripped end section (6) that is located in said third zone (42), which third zone (42) being between said first and second zones (40, 41), said punching step being configured so that said third portion (56) of said stripped end section (6) has a third predetermined degree of compression higher than said first predetermined degree of compression.