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New Holroyd Gear Grinding Centre Offers Greater Levels Of Efficiency In Precision Gear

New Holroyd Gear Grinding Centre Offers Greater Levels Of Efficiency In Precision Gear

New Holroyd Gear Grinding Centre Offers Greater Levels Of Efficiency In Precision Gear

A brand-new gear grinding centre from Holroyd Precision promises to bring higher levels of intelligence and efficiency to the production of specialised gears and tooth forms. Called the GT350, this latest machine from the Precision Technologies Group (PTG) company has been developed for one-off and batch grinding of precision spur and helical gears, worms and screws of up to 350 mm in diameter. It can also be used to precision grind compressor rotors.

Replacing Holroyd’s GTG2 model, the GT350 achieves accuracies in the order of DIN 2 and features the high power required for deep grinding operations. A specially developed extended machine bed allows screws and worm shafts of up to one metre in length to be accommodated. Dedicated software compensates for helical twist, and full topological capability comes as standard.

It is the GT350’s data collection and transfer capability, however, that could be of greatest interest to users. IO-Link communication technology, for example, is available with all new GT350 machines. “We selected IO-Link for its data-handling capabilities and its ability to communicate at every level of the production process,” says Holroyd Regional Sales Director, Steven Benn.

Simplifying the most complex processes

Maintaining the Holroyd tradition of building machines that simplify even highly complex manufacturing processes, the GT350 combines extreme rigidity with high power for both CBN and conventional deep grinding operations. Setup is rapid for optimised productivity and customers have the choice of either Siemens’ 840D controller or Holroyd’s in-house CNC and HMI system. On-board features include: automatic coordinate adjustment, in-cycle wheel dressing, integrated profile management and coordinate measurement. Grinding cycles are included for: spur gears; helical gears; crowned helical and spur gears with root or tip relief; worm gears of the form ZK, ZI, ZN and ZA; dual lead (duplex) worm gears; splines.

The GT350 also features Holroyd’s Profile Management System (HPMS) for highly accurate profile grinding, while an advanced touch-screen interface allows the operator to enter design drawing coordinates directly into the machine. Additionally, all gear, worm and spline profiles can be verified using the integrated Renishaw probing system, enabling automatic on-machine corrections to be made if necessary.

Compensating for helical twist

Holroyd’s design engineers have ensured that the GT350 automatically corrects the problem of helical twist – a condition that occurs when helical gears are ‘lead crowned’ to improve meshing and to reduce noise and wear. This is achieved through the use of specially written, dedicated software that both calculates and controls additional motions of the grinding wheel during the grinding operation.

 

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