Abstract:
It is described a curvic coupling (400) for rotational coupling, the curvic coupling comprising: plural teeth (402, 403) arranged in a circle and protruding from a circle plane extending in a radial direction (407) and a circumferential direction (409), wherein a side surface (411) of a tooth (403) of the plural teeth is opposite to a side surface (413) of another tooth (402) of the plural teeth, wherein the tooth (403) is adjacent to the other tooth (402) and separated from the other tooth by a separating surface (404), wherein the separating surface comprises a flat surface (405) lying in the circle plane, wherein the separating surface (404) comprises a central protrusion (423) between the side surface (411) of the tooth (403) and the side surface (413) of the other tooth (402), wherein the protrusion (423) protrudes from the circle plane.
Abstract:
The present invention relates to an adaptor 10, 20 and a connection device 30 for fixing a tool 2 to an arbor 100 of a hollow spindle machine. The adaptor 10 comprises an inlet opening 13 at a first part 11 of the adaptor 10, the inlet opening 13 being connectable to the central passage way 101 of the arbor 100; at least one outlet opening 14 at a second part 12 of the adaptor 10, the second part 12 radially protruding over the first part 11 and being adapted for holding the tool (2); a connection means 15 for fixing the adaptor 10 to the arbor 100; and a fluid distribution passage way 16 connecting the inlet opening 13 with the at least one outlet opening 14 so that the coolant is supplied to the tool 2 via the at least one outlet opening 14 of the adaptor 10.