Countersinking-carrier nozzle

A countersinking-carrier nozzle, which comprises a flat front surface (4) endowed with a central hole (9) through which emerges a countersinking drill (3) in order to establish a depth limit of countersinking when the flat front surface (4) presses against the countersinking surface (13);

• and includes flexible means of retention of the flat front surface (4) so that it swivels when contacting with a curved countersinking surface (13) and adapts itself and presses against it tangentially while the pressure is maintained;
• wherein the flexible means are defined by a ball-and-socket joint (2) comprising a curvo-concave retention receptacle (8), with possibility of swivelling, a complementary curvo-convex portion provided in the rear part of the flat front surface (4), which projects from the receptacle (8);
• all this in order to avoid displacement of said complementary curvo-convex portion and of said flat front surface (4) when the latter abruptly makes contact with the curved surface (13);
• and
• wherein the nozzle is applied in a headstock (1) governed by a numerical control machine which includes means of longitudinal displacement of the headstock in the forward and backward direction and means of detection of the moment in which the flat front surface presses against the countersinking surface in order to cause the headstock to withdraw.

A countersinking-carrier nozzle, which comprises a flat front surface (4) endowed with a central hole (9) through which emerges a countersinking drill (3) in order to establish a depth limit of countersinking when the flat front surface (4) presses against the countersinking surface (13);

• and includes flexible means of retention of the flat front surface (4) so that it swivels when contacting with a curved countersinking surface (13) and adapts itself and presses against it tangentially while the pressure is maintained;
• wherein the flexible means are defined by a ball-and-socket joint (2) comprising a curvo-concave retention receptacle (8), with possibility of swivelling, a complementary curvo-convex portion provided in the rear part of the flat front surface (4), which projects from the receptacle (8);
• all this in order to avoid displacement of said complementary curvo-convex portion and of said flat front surface (4) when the latter abruptly makes contact with the curved surface (13);
• wherein the receptacle (8) is retained in a headstock (1), with possibility of swivelling, the rear complementary portion of the flat front surface (4) being provided in one piece (8) mounted to the headstock (1);
• and
• wherein the nozzle is applied in the headstock (1), and the headstock (1) is governed by a numerical control machine which includes means of longitudinal displacement of the headstock in the forward and backward direction and means of detection of the moment in which the flat front surface presses against the countersinking surface in order to cause the headstock to withdraw.