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Machining of Boring Tube

2023-03-09

A boring cutter has three basic elements: an indexable blade, a cutter bar, and a boring seat. The boring seat is used to clamp the tool bar, and the clamping length is usually about 4 times the diameter of the tool bar. The length of the tool bar equipped with a blade extending from the boring base is called the overhang (unsupported portion of the boring tool). The overhang determines the maximum depth of the boring hole and is the most important dimension of the boring tool. Excessive overhang can cause severe deflection of the cutter bar, causing vibration, thereby damaging the surface quality of the workpiece, and possibly premature failure of the blade. These will reduce processing efficiency.
For most machining applications, users should choose boring cutters with the highest possible static and dynamic stiffness. Static stiffness reflects the ability of the boring tool to withstand deflection due to cutting forces, while dynamic stiffness reflects the ability of the boring tool to suppress vibration.