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US 2003/0118418 A1Published application
NC helical broaching machine improved in broach driving
OwnerShinzi Kinoshita, Koji Takedainventors
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Abstract
A broaching machine is of a work-moving type in which a broach is rotatively driven while a work held on a ram is pushed up against the broach to perform broaching of the work. The broach is driven at the front end shank and the rear end shank in synchronism with each other under the control of an NC controller. The work and the ram are adapted to be moved vertically (in a Y-axis direction). This construction frees the broach from any torsion and improves a machining accuracy.
Claims4
A work-moving type NC helical broaching machine comprising:
- a drive mechanism to grip and rotate a front end shank and a rear end shank of a broach;
- and
- an NC controller to activate the driving mechanism to rotate the front end shank and the rear end shank of the broach in synchronism with each other to cut a work.
A work-moving type NC helical broaching machine comprising:
- a ram movable to hold a work and move the work along a broach
- a first chuck to hold the broach on one side of the ram and rotate the broach;
- a second chuck to hold the broach on the other side of the ram to rotate the broach, the second chuck being movable toward or away from the first chuck;
- and
- an NC controller to operate the ram and the first and second chucks so that the broach is driven to rotate simultaneously on both sides of the ram to machine the work.
2 more elements
Dependencies are inferred from the claim text.