Reaming tool for coaxial boring uses head joined to guide shaft by selfcentering mechanism of ground face-limited pin and receiver cone for rapid tool change.

摘要

The reaming head (26) is joined to the guide shaft (16) by a self-centering clamping mechanism (30), using supporting elements close to the clamp (30) to adjust radially in diameter during the clamping operation. The clamping mechanism (30) has a conical receiver (34) arranged concentrically on the shaft (16) and bounded by an annular ground face (36) to take a conical pin (38) projecting coaxially from the head (26) and bounded by ground face (36). A clamping screw (40) run off the head engages the coaxial inside thread (44) of the shaft (16) so head (26) and shaft (16) when out of tension together define a gage spacing (a) round the ground faces (32,36). When pre-tensioned, head and shaft bear in a guide fit using elastic expansion of the receiver and the externally fitted supporting element specified.