The Holroyd TG350E rotor grinder has been installed at the company’s Higashi-Hiroshima facility and will be used to precision grind cast iron and stainless steel screw rotors of up to 350mm in diameter. Mayekawa already operates a number of Holroyd machines across its Japanese manufacturing sites. The TG350E was chosen for its ability to provide high-speed rotor grinding, combined with high levels of accuracy.
“We are delighted to have built a TG350E rotor grinding machine for Mayekawa,” comments Holroyd regional sales director, Steve Benn. “Traditionally, Mayekawa has rough milled then finish milled its helical rotors, using cutters where the finished profile shape is ground using a Holroyd CS500E tool management centre. With an increasingly wide range of rotor types to manufacture however, Mayekawa recognised the significant benefits that a TG350E CNC machine would bring to its production strategies.”
Through the TG350E rotor grinder, Mayekawa is benefiting from the accuracy, speed and repeatability that Holroyd machines are renowned for – along with greater levels of automation and reduced set-up time. With Holroyd TG series machines, a significant amount of production time is saved due to the fact that the diamond dressing wheels continuously dress during the cycle. By contrast, cutting tools require periodic re-grinding, depending on the materials and volumes being cut.
Holroyd’s TG series of multi-purpose grinding machines are known for their high levels of accuracy and efficient stock removal. Indeed, around 70 advanced Holroyd profile grinding machines are being used by manufacturers globally.
Equally suited to prototyping, batch and volume production, TG machines are designed primarily for the finish grinding of helical screw components such as worm screws and rotors, after they have been milled to a rough or semi-finished state. TG models offer production rates and accuracies to suit precise manufacturing strategies. Fully automated on-machine probing provides closed loop feedback of corrections to the dresser wheel and does not require a high level of operator skill.
TG grinding machines, at a glance offer an accelerated and simplified set-up and a wealth of features including: a fully automated grinding wheel balancing system; powerful, menu-driven touchscreen programming; an on-board Holroyd 3D CMM component scanning probe; high-power, high-speed grinding spindles; an optional hollow spindle for longer components; advanced in-process dressing systems; and large diameter grinding wheels, for maximum wheel life.
In addition, there is an optional Holroyd Profile Management System for profile development and control. The maximum component diameter ranges from 3mm to 450mm, depending on component profile, and maximum component weight is 500kg.
Precision Technologies Group www.holroyd.com
Mayekawa Manufacturing Company www.mayekawa.com
