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A Remedy To Uncertain Times

A Remedy To Uncertain Times

Medical manufacturing company Straits Orthopaedic delivers on diverse medical applications with their flexible ANCA CNC grinding machines. Article by Duncan Thompson, ANCA.

If manufacturers have learned anything over the recent months, it is that you can take nothing for granted. Circumstances can change quickly and how you are set up to respond can be the difference between your business flourishing or folding. Recognising this, Straits Orthopaedic has been investing in ANCA machines as part of their strategy to be a flexible manufacturer in the medical tooling and component market. 

The events of COVID-19 this year are perhaps the most extreme example of rapid market change and resulting uncertainty. But, even after more normal circumstances return, manufacturers need to be constantly vigilant, watching and responding to changes in the market that provide new opportunities or necessitate a pivot in their business. 

ANCA CNC grinding machines have long been recognised in the industry for their flexibility. It is this kind of flexibility that allows ANCA users to produce parts for diverse applications, so they are not limited to just one customer or one application. Powerful software allows users to create programs for a broad range of cutting tools and components. While modular machine design means features can be easily configured to suit the varying needs of different applications. 

The medical industry offers exceptional and diverse opportunities for manufacturers, with ANCA grinding machines supporting international markets in the production of complex bone rasps, long rotary reamers and tiny dental drills and burrs, just to name a few. 

Straits Orthopaedics, based out of Malaysia, is a case-in-point of a company taking advantage of ANCA’s diverse capabilities. Already well established for contract manufacture of medical components, Straits Orthopaedics’ first tool grinder was an ANCA FX5.

Senior Process Development Engineer Vidyadhiraj Vidyadharan comments, “Custom made tools have become a significant part of our growth in the medical tool market. We need the ability to make special tools to varying customer requirements and to be able to do it quickly. ANCA’s FX5 with its flexible tool programming software has certainly allowed us to meet this need. Demand for our diverse range of medical drills, reamers and planers easily justified our second FX5.”

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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

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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Precision And Pace Of Holroyd TG350E Secures Order From Jaguar Compressors

Precision And Pace Of Holroyd TG350E Secures Order From Jaguar Compressors

There are currently 70 TG Series machines in use around the world – and, each year, Holroyd typically receives orders to build several new TG models. The most recent order for a Holroyd TG350E has been placed by Jaguar Compressors, a division of the Xiamen East Asia Machinery Industry Company. Currently in build, and costing some £1.3 million, the machine will be shipped to Jaguar’s Xiamen-based manufacturing facility in mid 2020.

“With the ability to precision grind medium to large capacity rotors of up to 350 mm in diameter and 1795 mm in length, the TG350E model offered a versatile, high quality solution to Jaguar’s varied production requirements in producing screw compressors for a variety of applications, including precision filters, gas storage tanks and refrigerated dryers,” commented Holroyd Regional Sales Director, Steven Benn.

Holroyd TG Series machines provides high-speed and high-accuracy efficient stock removal. Considerable levels of automation mean reduced set-up time. As an additional advantage for users of Holroyd TG Series models, a significant amount of production time can be saved due to the fact that each machine’s diamond dressing discs are able to continuously dress during the semi-finish grinding cycles. By contrast, cutting tools typically require periodic regrinding – the frequency of which is determined by the materials and volumes being cut.

Designed primarily for the finish grinding of helical screw components after they have been milled to a rough or semi-finished state Holroyd TG Series machines are equally suited to prototyping and batch manufacture as they are to volume production. 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 disc and does not require a high level of operator skill.

 

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Studer: Internal Grinding

Studer: Internal Grinding

Studer has developed the S131 and S151 grinding machines, following the success they had with the S141. The S131 is smaller than the S141—with a swing diameter over the table of Ø250 mm and a maximum grinding length of 175 mm for internal and 125 mm for external grinding. It is available for workpieces with a maximum length of 300 mm.

The S151 is larger than the S141—it has a swing diameter over the table of Ø550 mm and a maximum grinding length of 400 mm for internal and 150 mm for external grinding. It is available for workpieces with a maximum length of 700 mm.

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