Tool coupling
AssigneeFried. Krupp Gesellschaft mit beschrankter Haftung
InventorRainer von Haas
Life of this patent
Estimating the term…
Abstract
To produce a connection without play between the shaft or shank (3) of a tool head (1) and a corresponding bore (4) of a tool holder (2), the shank includes an abutment collar (5), an adjacent short conical portion (3a), a cylindrical pin portion (3b), and a guide portion (3c) at the end of the shank. The short conical portion adjacent the collar is slightly overdimensioned compared to a corresponding conical portion (4a) of the bore. When the shank is forced into the bore at least one of these parts is elastically deformed and the abutment of the shank comes into planar contact with an end face of the tool holder. The guide portion (3c) at the end of the shank may be either cylindrical or conical.
Claims15
A tool coupling for securing a cutting tool against rotation and axial distortion, comprising:
- a tool head having a cutting edge, said tool head additionally having an abutment collar and having a shank with a free end, said shank being provided with a first conical portion adjacent said abutment collar, a guide portion at said free end of said shank, and an intermediate pin portion between said conical portion and said guide portion;
- and
- a tool holder having an abutment surface for planar engagement with said abutment collar and having a bore for receiving said shank, said bore having a first conical portion that is positioned to engage said first conical portion of said shank, said first conical portion of said shank being dimensioned so that at least one of said first conical portions is elastically distorted when said shank is forced into said bore, the elastic deformation bringing said abutment collar of said tool head into planar contact with said abutment surface of said tool holder, said bore additionally having a guide portion and an intermediate portion which is positioned between said first conical portion of said bore and said guide portion of said bore, said guide portion of said bore being in contact with said guide portion of said shank and said intermediate portion of said bore being spaced apart from said intermediate pin portion of said shank when said abutment collar of said tool head is in planar contact with said abutment collar of said tool holder.
Dependencies are inferred from the claim text.