Precision Machinery Research Development Center

Hsing-Chieh Huang

Chi-Cheng Kuo

Tadao Tsuneyoshi

Tung-Yi Lu

Peng-Jui Chen

Ching-Kuo Wu

A method for monitoring the spindle preload amount of a spindle by: Sobtaining a spindle preload amount through a PPC Preload Analyzer; and Sobtaining an axial force sensor output of the spindle through an axial force sensor, wherein the axial force sensor output is calibrated using the spindle preload amount that is obtained through the PPC Preload Analyzer; establishing a relationship between the spindle preload amount and the axial force sensor output, then regarding the axial force sensor output as the spindle preload amount, and then monitoring the spindle preload amount by monitoring the axial force sensor output.

Method for monitoring spindle preload amount

A tool holder assembly includes a holder body, a pull stud and a flow adjustment unit. The holder body has a holder coolant channel extending through a first end and a second end thereof. The pull stud has an insertion portion, a grip portion, and a longitudinal passage extending through the insertion portion and the grip portion, and fluidly communicating with the holder coolant channel. The flow adjustment unit includes a connection tube that extends into the longitudinal passage and projects outwardly from the grip portion, a resilient member urging the connection tube to project outwardly from the grip portion, and a flow guide channel extending through the connection tube and fluidly communicating with the holder coolant channel.

Growing community of inventors

Taichung, Taiwan

Hsing-Chieh Huang