Tool rest and machine tool
AssigneeDmg Mori Co., Ltd.
InventorsKenichi Mizukoshi, Isao Hikita
Life of this patent
Estimating the term…
Abstract
A tool rest includes: a tool holder including a clamp mechanism that operates by an oil pressure for clamping a tool; an attachment portion having a hole through which a hydraulic oil for the clamp mechanism is supplied, the tool holder being detachably attached to the attachment portion; a valve body arranged in the hole and operable between a first state in which, when the tool holder is not attached, circulation of the hydraulic oil is regulated upon receiving a pressure of the hydraulic oil, and a second state in which, when the tool holder is attached, circulation of the hydraulic oil is permitted; and an elastic member that is arranged in the hole and exerts an elastic force on the valve body so as to operate the valve body from the second state to the first state.
Claims4
A tool rest comprising:
- a tool holder including a clamp mechanism that operates by an oil pressure for clamping a tool;
- an attachment portion having a hole through which a hydraulic oil for the clamp mechanism is supplied, the tool holder being detachably attached to the attachment portion;
- a valve body arranged in the hole and operable between
- a first state in which, when the tool holder is not attached, circulation of the hydraulic oil is regulated upon receiving a pressure of the hydraulic oil, and
- a second state in which, when the tool holder is attached, circulation of the hydraulic oil is permitted;
- and
- an elastic member that is arranged in the hole and exerts an elastic force on the valve body so as to operate the valve body from the second state to the first state.
Dependencies are inferred from the claim text.