Patent ID: 7966918
Filing Date: 2011-06-28
Classification: B23D,Y10T

Abstract:
1. A band-saw machine comprising: an endless band-saw blade having a plurality of teeth; a band-saw blade guiding apparatus that is adapted to guide tooth tips on the band-saw blade toward a workpiece to be cut; a swinging arm that is adapted to swing in a vertical direction; a rotational shaft; a gear mechanism; a motor which rotates the rotational shaft via the gear mechanism; a cam attached to a first end of the rotational shaft; a cam follower provided on the swinging arm, which causes the swinging arm to swing in accordance with a rotation of the cam; a pressing rod having an upper end contacting an end of the swinging arm; a backup holding member provided on the band-saw blade guiding apparatus, and contacting a lower end of the pressing rod; a spline shaft attached to a second end of the rotational shaft; and a second cam attached to an end of the spline shaft, wherein, when the swinging arm swings in the vertical direction, the backup holding member is pressed towards the band-saw blade by the pressing rod to apply a vibration to the band-saw blade in a cutting direction with respect to the workpiece.