Single-Pass Honing Machine Achieves High Cylindricity

Sunnen’s VSS-2 series of honing machines is part of the company’s Single-Stroke Honing concept, a single-pass process that uses progressively larger, preset-diameter superabrasive tools to size and finish bores.

New Product Announcements From: 7/1/2014 Production Machining, ,

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Sunnen’s VSS-2 series of honing machines is part of the company’s Single-Stroke Honing concept, a single-pass process that uses progressively larger, preset-diameter superabrasive tools to size and finish bores. Though suited primarily for solid bore workpieces with length-to-diameter ratios of 1-to-1 or less, the machine can effectively hone cast iron valve bodies with bore ratios of 10 or greater and achieving cylindricity/straightness under 2 µ. Consisting of a tapered arbor with an expandable diamond-plated abrasive sleeve, the honing tool sizes bores ranging from 3.9 mm to 50.0 mm (0.149" to 2.0") in diameter in stamped parts, hydraulic valve bodies, gears and sprockets, among others. The machine effectively hones cast iron, powdered metals, ceramic, glass, graphite and other free-cutting materials.

The VSS-2 series includes three honing machine models incorporating as many as six spindles to meet various mid- to high-production needs. The spindle carriage provides a 724-mm (28.5") stroke and a 105-mm/sec. (250-ipm) stroking speed. Spindles are factory-aligned independently for precision centering over the tooling plate, producing improved bore geometry. The 7.5-kW, 10-hp spindle drive provides spindle speeds ranging from 100 rpm to 2,500 rpm, which can be varied along with column feed using the menu-driven touchscreen control. The servo-controlled stroking system can store as many as 100 profile setups (e.g., pecking, short stroke and dwell) and includes additional I/O modules and memory for integration with auxiliary equipment, such as robots and part loaders. 

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