Hob cutter arrangement
A hob cutter arrangement includes a tool body which has a continuous axial bore, conical bore sections forming both ends of the axial bore, an end shank body at each end of the tool body, and a conical section inserted into the conical bore section. Each end shank body has a radial flange which can be placed against an end face of the tool body and a shaft section on the side of the flange opposite the conical section for clamping in a machine tool. An axle connects the end shank bodies and clamps them together. The end shank bodies are provided with blind holes opening towards the axle and provided with threads to the axle. Elastic elements are clamped between a central section of the axle and a front side of the end shank body on both sides of the axle.
1 . A hob cutter arrangement with a tool body which is at least partially formed from a cutting material, and which has a continuous axial bore, conical bore sections forming both ends of the axial bore, an end shank body, respectively, at each end of the tool body, adapted for coupling with a hobbing machine, and which has a conical section inserted fittingly into the conical bore section, and which has a radial flange which is configured to be placed against an end face of the tool body when the conical section is seated in the conical bore section, and which the end shank body has a shaft section opposite the conical section for clamping in a machine tool, with an axle connecting the end shank bodies, which is adapted to clamp the end shank bodies together and bias the conical sections into the conical bore sections, and which is provided with at least partly threaded end sections,
wherein at least one of the end shank bodies are provided with axial blind holes for insertion of the end sections of the axle,
wherein the axle has a central section with an outer diameter smaller than the inner diameter of the central section of the tool body, and
at least one circumferential coupling between the axle and the tool body is located in the central section of the tool body, the coupling includes a positive connection with a longitudinal groove in an inner surface of the tool body and a longitudinal ridge on a surface of the axle.
2 . The hob cutter arrangement according to claim 1 , wherein the longitudinal ridge is formed by an insert piece received in a longitudinal groove of the axle.
3 . The hob cutter arrangement according to claim 2 , wherein the axle has sections with smaller diameter than the central section and adjacent to the central section, with pressure springs fit onto said sections for acting onto the end shank pieces.
4 . The hob cutter arrangement according to claim 3 , wherein each end shank piece is provided with at least one locking screw cooperating with a non-threaded portion of the end section of the axle.
5 . The hob cutter arrangement according to claim 4 , wherein a clamping ring is inserted between the flange of the end shank body and the end of the tool body on each side of the tool body.
6 . A hob cutter having a tool body which is at least partially formed from a cutting material, and which has a continuous axial bore, conical bore sections forming both ends of the axial bore, an end shank body at each end of the tool body which is adapted for coupling with a hobbing machine, and the end shank body having a conical section inserted fittingly into the conical bore section of the tool body, a radial flange of the end shank body is configured to be placed against an end face of the tool body when the conical section is seated in the conical bore section, and which the end shank body has a shaft section opposite the conical section for clamping in a machine tool, an axle connecting the end shank bodies is adapted to clamp the end shank bodies together and bias the conical sections into the conical bore sections,
wherein at least one of the end shank bodies are provided with axial blind holes for insertion of the end sections of the axle,
wherein the axle has a central section with an outer diameter smaller than the inner diameter of the central section of the tool body, and
a circumferential coupling between the axle and the tool body, the coupling includes a connection with a longitudinal groove in an inner surface of the tool body and a longitudinal ridge on a surface of the axle.