Chucking device and chucking method for machine tool
AssigneeSMC Corporation
InventorsAtsushi FUJIWARA, Junji Nishino
Life of this patent
Estimating the term…
Abstract
In a chucking device and a chucking method for a machine tool which grip a workpiece that serves as a target object to be processed by the machine tool, a first cylinder and a second cylinder are controlled based on the position of a piston of the first cylinder detected by a length measuring sensor, and the position of a piston of the second cylinder detected by a length measuring sensor. In this manner, the workpiece is gripped by respective gripping members at a predetermined position, i.e., the axial center, of a chuck main body.
Claims16
A chucking device for a machine tool for gripping a workpiece as a target object to be processed by the machine tool, comprising:
- a chuck main body;
- a first cylinder attached to the chuck main body and in which a first piston rod connected to a first piston is displaced in a direction toward the workpiece to thereby position the workpiece;
- a second cylinder attached to the chuck main body and in which a second piston rod connected to a second piston is displaced in a direction toward the workpiece to thereby press the positioned workpiece;
- a first position detecting sensor that detects a position of the first piston;
- a second position detecting sensor that detects a position of the second piston;
- and
- a control mechanism that controls the first cylinder and the second cylinder based on the position of the first piston and the position of the second piston, which have been detected, such that the workpiece is gripped at a predetermined position of the chuck main body by the first piston rod and the second piston rod.
A chucking method for a machine tool for gripping a workpiece as a target object to be processed by the machine tool, comprising:
- a first step of displacing a first piston rod connected to a first piston of a first cylinder that is attached to a chuck main body, in a direction toward the workpiece to thereby position the workpiece, in a state in which the workpiece is placed on the chuck main body;
- and
- a second step of displacing a second piston rod connected to a second piston of a second cylinder that is attached to the chuck main body, in a direction toward the workpiece to thereby press the positioned workpiece;
- wherein, in the second step, a control mechanism controls the first cylinder and the second cylinder based on a position of the first piston detected by a first position detecting sensor, and a position of the second piston detected by a second position detecting sensor, such that the workpiece is gripped at a predetermined position of the chuck main body by the first piston rod and the second piston rod.
Dependencies are inferred from the claim text.