Method and device for producing a hose nipple

A production method for profiled hose nipples, the method comprising:

• providing a divisible forming tool (2) having at least two tool parts (7), wherein the tool parts (7) each have at least one cutout which forms an elongate cavity when the tool parts (7) are assembled, wherein the cutouts are each profiled in such a way that when the tool parts are assembled, the elongate cavity has a profile (11) of predetermined geometry with radially inwardly projecting ring-shaped webs (12) and radially outwardly pointing ring-shaped grooves (13);
• inserting a pipe portion into the elongate cavity;
• pressing or drawing a forming punch into the pipe portion, wherein the forming punch is designed in such a way that when it is being pressed or drawn into the pipe portion, the diameter of the pipe portion increases and the material of the pipe portion is radially outwardly displaced into the profile of the elongate cavity, and that, in the region of the tool partings (6), a distance remains between the pipe portion material that is displaced into the radially outwardly pointing ring-shaped grooves (13) of the profile and the tool wall;
• opening the tool;
• removing the pipe portion which has been formed into a hose nipple (1).

An apparatus for producing a hose nipple (1), the apparatus comprising at least one at least two-part forming tool (2, 7) and at least one forming punch, wherein forming tool parts (7) of the at least two-part forming tool each have at least one cutout, and when the forming tool parts (7) are assembled, the cutouts form at least one elongate cavity which is suitable for accommodating a respective end of a pipe portion (1) with a predetermined geometry;

• wherein the elongate cavity has a profile (11) which has radially inwardly projecting ring-shaped webs (12) and radially outwardly pointing ring-shaped grooves (13, 14);
• wherein the radially outwardly pointing ring-shaped grooves (13) have, at their end zone assigned to the outward direction, additional cavities at least in the region of the tool parting (6);
• wherein the at least one forming punch is designed in such a way that it is pressed into the pipe portion (1);
• wherein a diameter of the forming punch corresponds to the predetermined geometry of the pipe portion (1) in such a way that when the forming punch is being pressed or drawn in, the pipe portion (1) can be deformed to have a diameter greater than its initial diameter, whereby material of the wall of the pipe portion (1) can be pressed outward;
• wherein the material that is pressed outward engages in the profile (11) of the elongate cavity and can be formed into a shape (3), which corresponds to the profile (11), of the pipe portion (1) in such a way that the material comes into contact with the inwardly projecting ring-shaped webs (12), and the material which is pressed into the outwardly pointing ring-shaped grooves (13) penetrates the ring-shaped grooves (13) in such a way that a distance remains between the pressed material of the pipe portion (1) and the tool (2, 7) as a result of the additional cavities (14).

An apparatus for producing a hose nipple (1), the apparatus comprising at least one at least two-part forming tool (2, 7) and at least one forming punch, wherein forming tool parts (7) of the at least two-part forming tool each have at least one cutout, and when the forming tool parts (7) are assembled, the cutouts form at least one elongate cavity which is suitable for accommodating a respective end of a pipe portion (1) with a predetermined geometry;

• wherein the elongate cavity has a profile (11) which has radially inwardly projecting ring-shaped webs (12) and radially outwardly pointing ring-shaped grooves (13, 14);
• wherein the radially outwardly pointing ring-shaped grooves (13) have, at their end zone assigned to the outward direction, additional cavities at least in the region of the tool parting (6);
• wherein the at least one forming punch is designed in such a way that it is drawn into the pipe portion (1);
• wherein a diameter of the forming punch corresponds to the predetermined geometry of the pipe portion (1) in such a way that when the forming punch is being pressed or drawn in, the pipe portion (1) can be deformed to have a diameter greater than its initial diameter, whereby material of the wall of the pipe portion (1) can be pressed outward;
• wherein the material that is pressed outward engages in the profile (11) of the elongate cavity and can be formed into a shape (3), which corresponds to the profile (11), of the pipe portion (1) in such a way that the material comes into contact with the inwardly projecting ring-shaped webs (12), and the material which is pressed into the outwardly pointing ring-shaped grooves (13) penetrates the ring-shaped grooves (13) in such a way that a distance remains between the pressed material of the pipe portion (1) and the tool (2, 7) as a result of the additional cavities (14).