FEATURE ON CNC LATHES AND TURNING CENTRES

Next-generation Puma DNT lathe series unveiled

Mills CNC, the exclusive distributor of DN Solutions and Zayer machine tools in the UK and Ireland, has introduced a new range of high-performance, box guideway lathes into the market. The next-generation 8-10” chuck (67-81mm bar diameter) DNT Puma 2100/2600 lathe series is inherently flexible and provides manufacturers with capacity up to 460mm turning diameter and 658mm turning length.

The new series comprises of eight models in total.Fundamental to performance is their rigid design and build, which boasts box guideways on all axes to help prevent vibration and, as a consequence, ensure high part accuracies, long tool life and improved surface finishes even during heavy-duty machining operations.

Spindle power and speeds vary (up to 26 kW and 4500rpm) and are model dependent. A high torque option (378Nm) for the DNT 2100M lathe is also available.

DNT lathes feature 10-12 station servo-driven turrets for fast (0.15 second indexing time) and accurate tool selection: driven tooling models are supplied with the rigid BMT 55P or 65P (base mounted) turret that can accommodate 5.5 kW/6000-10,000rpm rotary tools and facilitate fast and precise milling, drilling and tapping operations.To ensure the machining of longer workpieces, DNT lathes are equipped with manual, programmable or servo-driven tailstocks.

The new lathes feature the FANUC iPlus control with 15” touchscreen iHMI that is both intuitive and attractive.

Says Tony Dale, Mills CNC’s CEO:“New DNT 2100 and 2600 lathes are now available.Their impressive technical specification will, I am confident, have a universal appeal among component manufacturers looking to increase their productivity and deliver ‘right-first-time’ turned parts to their customers.”
For further information www.millscnc.co.uk

Longevity of lathes prompts repeat purchases

It is often said that a subcontractor does not know what type of work will be coming through the door tomorrow, so needs versatile machine tools to produce a wide variety of components. With this thought in mind, the mainstay for production of a large proportion of turned parts at contract machinist Repro Engineering are CNC turning centres from Citizen Machinery, both Miyano fixed-head lathes and Cincom sliding-head models.

The first Miyano to arrive (in 1997) was a BND42S twin-spindle lathe with live tooling. It departed just three years ago after 23 years of service, having produced more than 2 million components, most in one hit and a large proportion in lights-out operation. The second Miyano, a BND51S, arrived in 1998 and was sold in mid-2022 after an even longer period on the shop floor.

Repro Engineering’s owner and managing director Richard Palmer says: “We have a policy of regularly reviewing our capacity and keeping plant up to date. In the case of the Miyanos, however, earlier exchange simply wasn’t necessary, as the machines continued to hold tolerance.”

The replacement for the BND51S was a more capable BNJ-51SY, which arrived in May 2022. Featuring two turrets and Y-axis movement of the main turret, the lathe facilitates complex machining operations at the main and sub spindles simultaneously. Nine Miyano machines have been purchased over the years.

Regarding Repro Engineering’s sliding-head capacity, the subcontractor operates three Cincom lathes capable of machining parts up to 32 mm diameter bar. Impressed with the quality and longevity of the Miyano machines, Palmer decided to approach Citizen for larger Swiss-type lathes capable of producing bigger diameter, often shaft-type components. He purchased a Cincom A32-VII in 2009, followed by a more highly specified M32-VIII with a B-axis in 2013, and another A32-VII two years later.
For further information www.citizenmachinery.co.uk

Turning up productivity with lathes from Dugard

Companies with the heritage of AW Engineering are very rare. Founded in 1908 by Alfred Wood, the subcontractor switched its workload to munitions and aircraft parts during World War II and, ever since, the company has remained under the stewardship of the same family.

In 2020, AW Engineering moved to a new 15,000sqft factory in West Molesey, since when the companyhas doubled its turnover under the leadership of Mark Felstead, the great, great grandson of company founder Alfred. Contributing to this growth is the investment in three machine tools and a robot from Dugard: two SMEC SL2000BSY twin-spindle, single-turret turning centres; a Hanwha HCR5 collaborative robot (cobot); and a Hanwha XD38 IIRNHY sliding-head turning centre.

“During the pandemic, suitable machine tool supply was sparse,” says Felstead.“We spoke with Dugard and, within two weeks of placing an order for a SMEC SL2000BSY, the machine was on our shop floor and running. With furlough and other restrictions during the pandemic, Dugard was the only company that could serve our needs. Set-ups and programming are at least 20% faster with the Siemens control and we can prepare jobs and programs with confidence using the conversational programming and simulation within the system.”

Less than six months after the installation of the first machine, AW Engineering placed an order for a second SMEC SL2000BSY. A single operator mans the two SMEC machines. However, some components in the family of parts are above the 65mm diameter bar feed threshold and require manual loading. Here, AW Engineering has purchased a Hanwha HCR5 cobot from Dugard.

“Our cobot cell is now up and running, which means that both SMEC machines can run unmanned 24/7,” concludes Felstead.
For further information www.dugard.com

Latest MACH flat-bed lathes feature DynaPath control

MACH Machine Tools, part of the Vigilance Group, has introduced twoflat-bedCNC lathes into the market, both equipped with the DynaPath WinDelta control system.
The 8” (three-jaw) chuck MDL 1600 lathe and the larger 8/10” (three-jaw) chuck MDL 1800 model are equipped with 7.5kW/3500rpm spindles (12Nm), four-tool position turrets, sub-spindles (1kW/4000rpm), manual tailstocks (150mm travel), and boast 5 m/min rapids on their X and Z axes.

Capacity is model dependant.The MDL 1600 has X- and Z-axis travels of 230 and 820mm respectively, and a distance between centres of 1050 mm,while the MDL 1800 has 350mm (X-axis travel) and 1000mm (Z-axis travel) with 1250mm between centres.

The X and Zaxes on both machines feature precision ground box ways and precision ball screws for high accuracy and process optimisation.Both machines are suitable for performing a range of machining operations – turning, parting, grooving, facing, threading and tapping, as well as keyway, face and cylindrical milling of precision parts.

The DynaPath WinDelta control with 12.1” touchscreen available on all new MACH Machine Tools’ CNC lathes, tool-room mills and machining centres, is one of the most widely used control systems in the world. Deployed extensively in the US and the Far East for over 50 years, MACH Machine Tools says that the DynaPath control is flexible, versatile and easy-to-use, providing customers with simple-to-understand navigation and operation screens accommodating ISO and conversational programming on one platform. With online CAD editing capabilities, semi-auto functions and DRO operation, the DynaPath control provides power, speed and capability to even the most discerning machinist.
For further information www.machmt.co.uk

Helical Technology opts for Nakamura-Tome

Helical Technology has installed a Nakamura-Tome WT150 from the Engineering Technology Group (ETG) at its Lytham St Annes facility in Lancashire.As a manufacturer of valve rotators used in the marine, locomotive, mining, automotive and power generation sectors, the products and assemblies are critical components that demand the utmost precision and quality. To uphold its stringent quality requirements, the family-owned company has embarked on a continuous investment programme to enhance the productivity and performance of its machine shop. The shop produces upwards of 500,000 steel components each year that contribute to the company’s annual output of over 4 million assemblies.

Operations manager Chris Waddington says: “Our investment strategy started with two turning centres from one of the largest and most prestigious brands in the world, but they let us down badly. In 2018, we had a 156mm diameter valve rotator that was required in batches of 150 per month and the machine kept breaking down. Subsequently, in 2019 a smaller 42mm valve rotator was ramping up from 5000 parts a week to 8000 and we needed a turning centre urgently. This leading manufacturer had an available machine, but it also proved a massive let-down.”

With 8000 parts to get out of the door and an unreliable machine, the company owners bought Waddington a Nakamura WT150II, an ex-demo machine that arrived in January 2020.

“The difference was like night and day,” he states.“The cycle times were 5 to 10% faster than the other leading machines we had bought, while tool life improved by 15%.”

The investment was followed by the purchase of a Nakamura-Tome NTY3-100 twin-spindle, triple-turret turning centre in 2021, which instantly took 20-25% out of cycle times. A smaller footprint Nakamura AS200LMSY arrived in June 2022.
For further information www.engtechgroup.com