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US 5,873,687 AGranted
Tool unit with hydraulic feed passage
AssigneeMori Seiki Co., Ltd.
InventorMichio Watanabe
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AssigneeMori Seiki Co., Ltd.
InventorMichio Watanabe
Estimating the term…
A tool unit according to the invention has an arrangement wherein a shaft-like mount portion having a step is disposed on one of a tool body or a tool holder. The other of the tool body or the tool holder, includes a recessed fitting portion or bore shrinkage-fitted on the mount portion and having a step. The fitting portion includes a hydraulic feed passage for externally feeding a high-pressure oil to a gap defined between the step of the mount portion and the step of the fitting portion. In mounting the tool body to the tool holder, the high-pressure oil is externally fed to the gap through the hydraulic feed passage. Thus, a thin layer of the high-pressure oil is formed between the shrinkage-fitted surfaces, while on the other hand, the tool body and the tool holder are drawn close to each other. This facilitates the correction of inclination or axial displacement of the fitting portion relative to the mount portion, which occurred during the shrinkage-fit process. Additionally, feeding the high-pressure oil to the gap allows the tool body to be readily dismounted from the tool holder.
A tool unit comprising:
A tool unit comprising:
A tool unit comprising:
Dependencies are inferred from the claim text.