Patent ID: 9539687
Date: 2017-01-10
CPC Classifications: B23Q,Y02P

Claim:
1. A tool holder for a chip suction device being a tool holder loaded to a machine tool including the chip suction device, comprising a holder side part of a chip suction path of the chip suction device, wherein a connection portion between the holder side part and a main body side part provided on a machine main body of the chip suction path is formed to have a non-contact structure, and a cross-sectional center of the holder side part and a cross-sectional center of the main body side part match in an axial direction of the tool holder, the connection portion is configured by a downstream end of the holder side part and an upstream end of the main body side part with a gap provided therebetween, the downstream end of the holder side part is closer to a work to be machined than the upstream end of the main body side part to the work, the upstream end of the main body side part is tapered with an inner diameter increasing a size thereof as the chip suction path extends towards an upstream, and the downstream end of the holder side part is tapered with an outer diameter decreasing a size thereof as the chip suction path extends towards a downstream.