The invention relates to a method for producing a rod- or pipe-shaped connecting element (100, 100′) having an end face (106) from a semi-finished connecting element (102) made of metal, in particular of a drill or chisel insertion end which is secured in an axially movable manner in a chuck of a hammer drill, a semi-finished connecting element (102) is provided, characterized in that at least one radially movable forming body (206) guided in the recesses (204) of a die (202) for forming at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) has a smaller longitudinal extension (LR) than a planned length (L) of the longitudinal groove (122, 124) and that the forming of the at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) is performed by radially applying the at least one forming body (206) and by subsequently axially shifting the semi-finished connecting element (102) in a longitudinal die opening (214) of the die (202).

The invention relates to a method for producing a rod- or pipe-shaped connecting element (100, 100′) having an end face (106) from a semi-finished connecting element (102) made of metal, in particular of a drill or chisel insertion end which is secured in an axially movable manner in a chuck of a hammer drill, a semi-finished connecting element (102) is provided, characterized in that at least one radially movable forming body (206) guided in the recesses (204) of a die (202) for forming at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) has a smaller longitudinal extension (LR) than a planned length (L) of the longitudinal groove (122, 124) and that the forming of the at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) is performed by radially applying the at least one forming body (206) and by subsequently axially shifting the semi-finished connecting element (102) in a longitudinal die opening (214) of the die (202).

A drill steel includes a metal rod with an end to fit within a chuck of a drilling machine, and an integrally formed collar provided along the length of the metal rod. A ferrule is fastened on the metal rod adjacent the integrally formed collar on the side of the end of the metal rod. The ferrule forms a stop that prevents the drill steel from moving too far into the chuck.

The invention relates to a method and an apparatus for producing a rod- or pipe-shaped intermediate product provided with an end face (106) from a semi-finished connecting element (102) made of metal, in particular an insertion end of a drill or chisel attached in an axially movable manner in the chuck of a hammer drill, the connecting element (100′) having at least one rotary entrainment surface (162, 164) and at least one locking depression (122, 124), the locking depression (122, 124) being preferably embodied as a locking groove, a semi-finished connecting element (102) being provided, the at least one rotary entrainment surface (162, 164) being formed in the semi-finished connecting element (102) by axially forcing the semi-finished connecting element (102) in the direction of the longitudinal axis (136) of the semi-finished connecting element (102) into a longitudinal die opening (204) of a die (202), or being embossed in the semi-finished connecting element (102) by radially applying at least one movable forming body (206), and the at least one locking depression (122, 124) being embossed by radially applying at least one or multiple forming bodies (206) that are movable in the same die (202).

The invention relates to a method and an apparatus for producing a rod- or pipe-shaped intermediate product provided with an end face (106) from a semi-finished connecting element (102) made of metal, in particular an insertion end of a drill or chisel attached in an axially movable manner in the chuck of a hammer drill, the connecting element (100′) having at least one rotary entrainment surface (162, 164) and at least one locking depression (122, 124), the locking depression (122, 124) being preferably embodied as a locking groove, a semi-finished connecting element (102) being provided, the at least one rotary entrainment surface (162, 164) being formed in the semi-finished connecting element (102) by axially forcing the semi-finished connecting element (102) in the direction of the longitudinal axis (136) of the semi-finished connecting element (102) into a longitudinal die opening (204) of a die (202), or being embossed in the semi-finished connecting element (102) by radially applying at least one movable forming body (206), and the at least one locking depression (122, 124) being embossed by radially applying at least one or multiple forming bodies (206) that are movable in the same die (202).

A drill steel includes a metal rod with an end to fit within a chuck of a drilling machine, and an integrally formed collar provided along the length of the metal rod. A ferrule is fastened on the metal rod adjacent the integrally formed collar on the side of the end of the metal rod. The ferrule forms a stop that prevents the drill steel from moving too far into the chuck.

The invention relates to a method for producing a rod- or pipe-shaped connecting element (100, 100) having an end face (106) from a semi-finished connecting element (102) made of metal, in particular of a drill or chisel insertion end which is secured in an axially movable manner in a chuck of a hammer drill, a semi-finished connecting element (102) is provided, characterized in that at least one radially movable forming body (206) guided in the recesses (204) of a die (202) for forming at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) has a smaller longitudinal extension (LR) than a planned length (L) of the longitudinal groove (122, 124) and that the forming of the at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) is performed by radially applying the at least one forming body (206) and by subsequently axially shifting the semi-finished connecting element (102) in a longitudinal die opening (214) of the die (202).

The invention relates to a method for producing a rod- or pipe-shaped connecting element (100, 100) having an end face (106) from a semi-finished connecting element (102) made of metal, in particular of a drill or chisel insertion end which is secured in an axially movable manner in a chuck of a hammer drill, a semi-finished connecting element (102) is provided, characterized in that at least one radially movable forming body (206) guided in the recesses (204) of a die (202) for forming at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) has a smaller longitudinal extension (LR) than a planned length (L) of the longitudinal groove (122, 124) and that the forming of the at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) is performed by radially applying the at least one forming body (206) and by subsequently axially shifting the semi-finished connecting element (102) in a longitudinal die opening (214) of the die (202).

The invention relates to a method and an apparatus for producing a rod- or pipe-shaped intermediate product provided with an end face (106) from a semi-finished connecting element (102) made of metal, in particular an insertion end of a drill or chisel attached in an axially movable manner in the chuck of a hammer drill, the connecting element (100) having at least one rotary entrainment surface (162, 164) and at least one locking depression (122, 124), the locking depression (122, 124) being preferably embodied as a locking groove, a semi-finished connecting element (102) being provided, the at least one rotary entrainment surface (162, 164) being formed in the semi-finished connecting element (102) by axially forcing the semi-finished connecting element (102) in the direction of the longitudinal axis (136) of the semi-finished connecting element (102) into a longitudinal die opening (204) of a die (202), or being embossed in the semi-finished connecting element (102) by radially applying at least one movable forming body (206), and the at least one locking depression (122, 124) being embossed by radially applying at least one or multiple forming bodies (206) that are movable in the same die (202).