6. SAWS
· Basically a saw drags a number of cutting teeth through work to cut a thin slot. When done, two major piece can be separated.
· The basic saw blade look like,
· Saw types,
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Circular saws - use round blades rotated at high speeds.
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Band saw - a band is in one continuous loop-, like a ribbon.
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Hack saw - a small blade much like a steel ruler. This is moved back and forth (it reciprocates) to provide the cutting action.
· Saw operations include,
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Cutoff - one smaller piece of stock is cut from a larger one.
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Contouring - a bandsaw is used to cut a non-straight path in an object, often this step precedes other machining operations, such as drilling.
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Stack Cutting - multiple pieces are cut at the same time.
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Shaping - Chunks are cut out of a larger piece.
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Angular Cuts - such as cutting a side hole in a pipe.
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Internal Cuts - the entire hole is enclosed in the material.
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Ripping - Long cuts to separate parts into halves.
