Wide sweep tilting mechanism for a band saw
AssigneeArmstrong-Blum Mfg. Co.
InventorJames K. Jourdan
Life of this patent
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Abstract
A mechanism for varying the position of a band saw blade in a tilting frame band saw. The mechanism includes an actuator, a tilt arm and a tilting frame. The actuator is pivotably connected to a support, and the tilt arm is pivotably connected to both the tilting frame and the actuator. The actuator is connected to the tilt arm such that the angular movement of the frame, which results from extension and retraction of the actuator, bears a substantially linear relationship to the stroke of the actuator. The mechanism of the present invention enables the frame to be made with an exceptionally wide sweep, and may be controlled by a proportional hydraulic valve controlled on the basis of location data provided by an encoder mounted within the tilting frame.
Claims12
A mechanism for varying the angular position of a frame in a tilting-frame cut-off band saw comprising:
- a frame carrying a band saw blade and a motor for moving said blade relative to a workpiece, said frame, blade and motor being movable together toward and away from said workpiece, and said frame being pivotable about a frame axis,
- a tilt arm connected to said frame and adapted to move said frame about said frame axis, said tilt arm having a first portion slidably connected to said frame and a second portion pivotably connected to a fixed support,
- a tilt arm drive adapted to move said tilt arm about said fixed support, said tilt arm drive having a fixed and pivotable end and a second end connected to said tilt arm at a location on said tilt arm between opposite ends of said tilt arm.
A tilting-frame band saw comprising a pivoting frame, said frame being moveable about a tilt axis to locations between two extreme fully tilted positions in which said frame is fully tilted in opposite first and second directions, respectively, a mechanism for moving said frame to said locations, said mechanism including a support, a tilt arm connected to said frame and adapted to move said frame about said tilt axis, said tilt arm having a first portion slidably connected to said frame and a second portion pivotably connected to a fixed support, and a tilt arm drive adapted to move said tilt arm about said fixed support, said tilt arm drive having a fixed and pivotable end and a second end connected to said tilt arm at a location on said tilt arm between opposite ends of said tilt arm.
Dependencies are inferred from the claim text.