FEATURE ON CNC MILLS & MACHINING CENTRES

Trio of machines installed at subcontractor

Mills CNC, the exclusive distributor of Doosan machine tools in the UK and Ireland, has supplied three new Doosan vertical machining centres to Portsmouth-based precision subcontract specialist, Penta Precision Engineering Ltd. The three machines are all Doosan DNM 4500 models.

Says Edward Moss, Penta Precision’s technical account manager: “We constantly audit and review our operational efficiency and effectiveness as part of a company-wide continuous improvement programme. As a result, we identified that some of our older machine tools were experiencing reliability issues and causing production bottlenecks. It became clear that, to help alleviate these problems, we needed to invest in new high-performance machines.
“Doosan’s DNM series of vertical machining centres are popular, proven and have a good reputation in the market,” he adds. “Having contacted Mills, we visited their facility in Leamington to see the DNM machines, and to discuss our requirements in more detail. We were impressed with their approach and by the aftersales service and support they provide to customers.”
The three Doosan DNM 4500 machines supplied to Penta Precision are all equipped with a 10.4” console, Fanuc 0iMF control (with 200 block look-ahead function), BT40 direct-coupled 18.5 kW/12,000 rpm spindle (117.8 Nm), 30-position ATC and linear guides on all axes.
In addition to the standard specification, Penta Precision also requested Renishaw spindle probes and Filtermist oil/mist extraction units on all three machines, and a Nikken rotary table on one.
“Since being installed the three DNM 4500 machines have been working flat out,” says Moss. “Our investment in Doosan machine tools from Mills CNC is having a positive impact on our productivity, performance and profitability.”
For further information www.millscnc.co.uk

Battle robots get a five-axis boost

For followers of the BBC’s Robot Wars programme, the names Sir Killalot, Shunt, Matilda and Dead Metal will be familiar as the house robots whose sole purpose is to lie in wait for competing bots and take their opportunity to destroy them.

These mean weapons are designed and built by two brothers in a small corner of their family business that is more used to manufacturing furniture castors.
Grant and James Cooper both worked for the family company of Priory Castor and Engineering in Birmingham, but as that business changed they saw a need to diversify and put their knowledge of engineering design to good use. The result was Robo Challenge, a design and creative engineering company that now works alongside TV production companies to create one-off robots and engineering concepts.
Robo Challenge employs an XYZ LPM vertical machining centre to create a range of parts from aluminium, titanium and stainless steel.
“We tend to be at the end of the process after weeks, if not months of discussion have taken place,” says Grant Cooper. “We are then asked to produce complex machines in a short space of time. For example, the four house robots for Robot Wars were designed and built in less than eight weeks, but typically we get one to three weeks to complete a project, so an efficient machine that can be used by anyone here was essential for us. The LPM with its ProtoTrak control, tool changer and large table, works perfectly for us, especially as just about everything we produce is a one-off.”
For further information www.xyzmachinetools.com

Dyson cleans-up with new machining centre

Founded almost 100 years ago, Milton Keynes based Dyson Diecastings Ltd initially started as a casting business, although nowadays the company offers a multitude of services, something that is supported by the recent acquisition of a Fanuc Robodrill B-series machining centre.

“As technology has evolved, so have customer demands and the capabilities of our company,” says director Paul Savage. “We have moved from just drilling and tapping to adding a CNC machining department, and now conduct profile milling, facing and much more. In terms of value-added processes, we offer painting, plating and polishing for those who want a fully finished product.”
The Fanuc Robodrill B-series D21LiB5 features an extended bed length that accommodates the variety of components that pass through the machine shop at Dyson.
“Usually, we would go for a 1 m bed length machine and also have a 600 mm Fanuc machine alongside, but this 800 mm bed length Fanuc is ideal for what we need,” says Savage. “A key factor in selecting the B-series is that we bought a Fanuc Robodrill T21iF about six years ago and its reliability has been outstanding. Spare parts are sourced locally and the cost of running it has been kept very low. The B-series machine comes with a new interface while the spindle speeds and indexing unit all match what we’d been running previously. Programs transfer very simply and it ticks all the right boxes.”
For further information www.fanuc.eu

Heavy-duty VMC range unveiled

Continued development at XYZ Machine Tools sees the arrival of its seven machine HD (Heavy-Duty) range of vertical machining centres. These machines supersede the previous series of box-slideway models in the XYZ range and complement the latest LR (Linear-Rail) machines that have been added to its catalogue.

XYZ says that HD machines will allow maximum metal removal rates thanks to their Meehanite cast beds and columns, along with induction-hardened, ground and Turcite-coated box slideways. X-axis travels extend from 660 to 3000 mm.
The range starts with the XYZ 660 HD, which features increased X- and Y-axis travels of 660 and 450 mm, yet retains a compact footprint. The other machines in the series are the XYZ 800 HD, 1100 HD and 1510 HD, with three ‘super-heavyweight’ machines, the XYZ 2010, 2510 and 3010 HD, completing the range.
XYZ reveals that the four smaller HD machines all feature increased axis travels, as well as increased spindle power where it was deemed necessary. For example, the XYZ 660 now has a 25 kW spindle, an increase of 123% over its predecessor. Spindle speed is also improved by 25% to 10,000 rpm, with other machines in the range gaining around 66% spindle power.
The Siemens 828D ShopMill control featuring 15” touch screen is fitted as standard, with the control pendant-mounted on several machines in the range for further ease of use. Customers also have a number of options available, such as 4th- and 5th-axis attachments, swarf conveyors and on-machine tool and workpiece probing.
For further information www.xyzmachinetools.com

£3.5m machining facility takes next step

A new £3.5m state-of the-art machining facility in Tewkesbury has taken the next step in its development after installing the latest CNC technology.

The Bowmill Group, which provides precision engineering, grinding and surface processing services to the aerospace sector, has installed a Chiron FZ12 FX Magnum Vario five-axis vertical machining centre to help it supply critical landing gear components to Safran Landing Systems for the Airbus A320/A321.
Supplied by the Engineering Technology Group (ETG), the turnkey package comes with 64 HSK tool stations, the latest measuring cycle probe system from Renishaw and a Fanuc six-axis robot with automated pallet system to support lights-out manufacturing. The machine has now been installed and is producing 1500 units per month, with a 9% improvement in accuracy across all of the 10 prismatic parts that have so far been proven out.
Nick Epps, managing director of Bowmill, says: “More than £2.5m has been spent with ETG on supplying a range of Quaser, Nakamura and Chiron technologies, and this has not only given us significant additional capacity for existing and future work, but allowed us to meet the aerospace sector’s demand for quality, delivery, support and commercial objectives.
“The Chiron FZ12 and Fanuc robot is our latest purchase and is already surpassing expectations in terms of productivity and quality,” he adds. “The change-over sequence and single-point fixturing and work-holding from Hyfore, which has significantly enhanced the tooling we have at our main site in Poole, has contributed to reducing cycle times. We are now exploring the option of machining additional items on this machine.”
For further information www.engtechgroup.com