Techspex

Nov 2017

Techspex provides metalworkers free research and analysis tools to help them find the right machine for their job.

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techspex.com | The Machine Tool Search Engine 5 machine is often preferred, because this type of table offers greater rigidity for holding big, heavy parts. The swiveling head enables the use of shorter, standard tooling, because all tool rotations occur above the part. Swiveling- head machines tend to be more versatile, lending themselves to using multiple fixtures, vises or tombstones. This somewhat simulates the appeal of an HMC. A trunnion-style machine is often preferred in moldmaking, because both rotary axes are contained in the trunnion table itself and the spindle head is stationary. This configuration is similar to that of the three- or four-axis machines most moldmakers are already used to. The spindle head reaches out over the tilting table, providing better undercut capabilities and some access to the underside of the part. As the spindle head itself does not rotate, trunnion-style machines tend to be more effective in heavy chip removal and can use full X, Y and Z travels to accommodate large parts. Five-Axis Machining in Action The "five" in five-axis machining refers to the number of directions in which the cutting tool can be oriented as it approaches the part surface. This maneuverability provides almost unlimited possibilities for the type and shape of parts one can effectively machine. A significant advantage of five-axis capability is being able to process five sides of a part in a single setup. All sides are accessible except the one resting on the table. For this reason, shops that don't have full five-axis work involving complex shapes can still benefit greatly from the five-sided machining a five- axis unit allows. If parts being produced on a three-axis machine must be flipped over or repositioned, producing them on a five-axis machining

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