Named for the 300-mm distance between its twin spindles and two tables, SW North America's BA 322 compact horizontal machining center (HMC) is designed for four- or five-axis machining of small- to medium-sized steel, cast iron and light metal workpieces. Typical examples of machined components include brake calipers, hydraulic valves, and turbocharger components such as compressor wheels. The double swivel table design allows in-cycle workpiece load/unload. The HMC equips two spindles, a twin swivel trunnion and twin or quadruple five-axis modules. It uses the company's Monobloc machine bed, which is said to provide a rigid framework to ensure precise machining. This stiff cube carries the three-axis unit and can equip as many as four spindles in other BA 3-series machines. The horizontal spindle arrangement provides optimum chip flow.
Instead of synthetics, the machine uses lost-wax-cast collets in high-alloyed steel, controlled by a cylinder and monitored to confirm the tool is correctly locked. A choice of three different magazine sizes accommodates as many as 128 tools per machine, along with a pickup tool changer system. The un-tensioned magazine chain reaches speeds of 80 m/min. and runs in a link rail. Retightening is not necessary. Each of the two workholding units on the twin swivel trunnion is controlled by as many as eight hydraulic and five pneumatic pipes, all featuring rotary distributors.
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