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Grinding


For Fives Cinetic Corp. (Hagerstown, MD), the LANDISflex line of traverse/contour/plunge shaft grinder line represents a significant entrée to the precision requirements of nonautomo- tive markets. “The LANDISflex line of precision grinders repre- sents diversification of our capabilities and technologies into the nonautomotive applications found in the construction, mining, and agricultural equipment markets,” said Dwight Myers, presi- dent and CEO of Fives Cinetic. “These applications share the same precision requirements and quality characteristics that we have delivered to the automotive market so successfully and that have guided design of our grinding machine technology.”


hardness of the coating and finished with a polishing film. A lot of typical grinding is done with an aluminum oxide, silicon carbide, or vitrified CBN wheels. We can use conventional aluminum oxide wheels which the industry has used histori- cally, and we’re bringing in a lot of CBN and vitrified diamond wheels that allow us to do all these features including grinding ODs and interpolating radiuses in different forms and faces also in the same operations,” said Hykes. “The LANDISflex traverse/contour/plunge grinding system is designed to provide sustainable productivity, precision, and flexibility in a reduced carbon footprint of reduced power con- sumption,” said Myers. LANDISflex machines are capable of grinding shaft-type parts up to 4.0 m in length. The base ma- chine, available in single and dual-wheelhead configurations, can accommodate cylindrical parts up to 400-mm diameter, with a 750-mm part swing optional. Standard models include dedicated 30° plunge machine, dedicated straight machine; single and dual-spindle swivel machine; and twin wheelhead machine. LANDISflex grinders can accommodate either con- ventional aluminum oxide or superbrasive CNB or diamond grinding wheels. A B axis allows using multiple spindles and programmable angles to handle combined operations in a single fixture.


A Marposs Protomar absolute gage with a 300-mm measuring range has been incorporated into LANDISflex machines so that variable parts up to 300-mm size can be handled in grinding screw compressor shafts.


Typical applications in the construction/agriculture/min- ing markets for the LANDISflex include large cylinders and struts, large drive shafts, landing gears, compressor rotors, axles, and large components that have high-performance coatings that require polishing as well as precision grinding. “We’ve incorporated grinding and polishing onto one plat- form for applications that require both and perform them in a single operation,” said Tim Hykes, director of technology. “For one customer, we supplied a fully automated process that significantly improved quality levels. We are able to deliver the precision and stability of the machines because we have single-digit micron accuracies in all axes of motion by virtue of our use of linear motors, precision roller guiderails, and preci- sion spindles,” said Hykes. “We’re seeing many of these large components with coat- ings replacing chrome,” said Hykes. “These hard coatings are typically ground with a vitrified diamond wheel because of the


82 ManufacturingEngineeringMedia.com | June 2014


“Advanced coolant management design isolates the grinding coolant from the machine structure and the thermal effects of the energy being put into the grinding process. His- torically, that would have required a lot of compensation in the machine. With our coolant management system we keep the coolant off the machine structure with layers of insulation and panels so that warm coolant falls into a channel away from the machine,” said Myers.


“One of the prime design goals for the LANDISflex line was energy efficiency. We’ve seen about 25% reduction in energy consumption, which lowers the total cost of own- ership of the machine,” said Hykes. He goes on to point out another important target for the grinder production optimization.“We’ve basically taken the black art out of grind- ing by incorporating the skills required of the operator into the machine itself and have reduced takt times from hours to fractions of hours,” adds Hykes, as he ties together long-term savings an immediate value.


A Marposs Protomar absolute gage with a 300-mm mea- suring range has been incorporated into LANDISflex machines so that a range of diameters up to 300 mm can be handled in grinding shafts with a variety of features. These parts are up to


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