FEATURE ON CNC LATHES AND TURNING CENTRES

Single-opmachining of heavy-duty chains

Precision Chains in Dudley makes heavy-duty roller chains for use in quarrying, agriculture andescalator applications, to list but a few. The smallest chain link is 2” and the biggest can weigh as much as 25kg.

Ian Thomas, general manager of Precision Chains, says: “Our challenge was to find a better way of manufacturing therollers, pins and bushes required for the chains. Previously, we had to turn, mill, cross-drill, drill down the centre, counterbore and deburr them. All these operations were very labour intensive and time consuming with set-ups on up to three machines, not to mention all the handling involved. Furthermore, moving between these machines has an impact on accuracy.”

Precision Chains chose an XYZ TC320 LTY with parts catcher, swarf management and Hydrafeed bar feeder. The XYZ TC320 LTY has a Siemens 828D control with ShopTurn for easy programming of the Y axis and live tools. It can chuck up to 300mm diameter and has a bar capacity with the bar feeder of up to 78mm diameter. The machine features Ceratizit tooling with two sets of live tools for cross drilling, milling flats and machining lubrication spirals. The company also doubles up with some tools performing both turning and facing operations.

“We run the XYZ TC320 LTY from 07:30 to 21:30, making a complete part in one operation with one operator checking the machine from time to time while completing other tasks,” says Thomas. “We’ve also been able to dispose of two machines which we no longer need.”

Four people underwent training on the XYZ TC320 LTY at XYZ Machine Tools’ Nuneaton office and, working from drawings, the trainees were quickly confident in using the machine and Siemens control.
For further information www.xyzmachinetools.com

New machine investment adds-up for Adnet

Located in Brockworth on the outskirts of Gloucester, Adnet Precision Engineering is a subcontract manufacturer that continually grows its business. Operating in the defence, pharmaceutical, aerospace, metrology, medical, telecommunications and semiconductor industries, the company has ramped up its investment in machine tools to support ongoing growth. The latest investments include an array of turning centres and sliding-head lathes from Dugard.

Caroline Day, director at Adnet Precision,says: “We already had one sliding-head machine, but we were running out of capacity, so we invested in the Hanwha XD20-IIV. This new machine is running parts more than 30% faster than our existing sliding head.”

With a maximum speed of 10,000rpm on the main spindle and 8000rpm on the sub-spindle, the machine has a spindle motor power of 2.2/3.7kW. A FANUC 32i-B CNC drives the Hanwha XD20IIV, which provides precise machining through its high tool adaptability, minimised thermal displacement and driven-tooling capabilities. The Hanwha XD20IIV is supplied material via a 3m bar feed.

Most recently, the company purchased a SMEC SL2000SY twin-spindle turn-mill centre from Dugard. This workhorse has an 11/18kW spindle motor that provides high torque for maximum material removal, while the heavily ribbed Meehanite cast and structural design provide high levels of surface finish, repeatability and precision. The 8-inch chuck machine has a sizeable capacity with a swing over bed and cross slide of 650 and 540mm respectively,alongside a maximum machining diameter of 395mm and a maximum machining length of 450mm.

“With the twin spindles we can achieve a lot more work; it’s probably 30% more efficient than the two machines it replaced,” says Day. “The machine also has far more capability.”
For further information www.dugard.com

Mills CNC supplies MCS with two more machines

Mills CNC has supplied precision subcontract specialist – Machined Component Systems (MCS) – with two newFANUC-controlled multi-tasking turning centres.The machines, a 10” chuck Puma 2600SY II lathe with sub-spindle and Y axis, and an 8” chuck TT 1800SY twin-spindle, twin-turret turning centre, both featureHydrafeed MSV80 bar feeders.

The latest arrivals have significantly strengthened the in-house machining capacity and capabilities at MCS, taking the total number of machine tools at the company’s disposal to 40, five of which are DN Solutions and Doosan machines supplied by Mills CNC.

Says MCS managing director Warren Gray:“The Puma 2600SY is fast, accurate, powerful and reliable. With its integrated Y axis and sub-spindle the machine is capable of processing high-precision, complex parts in one-hit and, in a relatively short period of time, has proved its worth.It was these capabilities, in addition to its immediate availability, which clinched the deal.”

The investment in the TT 1800SY turning centre arrived as a direct result, back in early 2023, of an existing customer dramatically uplifting its requirements for high-quality mill-turned machined parts. While obviously great news for MCS, the increase in demand, if not addressed quickly and decisively, would have swallowed up a significant proportion of the company’s existing turning capacity.

“The TT 1800SY allows simultaneous machining on both spindles and enables us to perform high-precision milling, drilling and tapping operations in a single set-up,” says Gray. “Byintegrating the machine with a bar feeder we have a ‘de facto’ flexible automated manufacturing cell at our disposal.”
For further information www.millscnc.co.uk

Exploring the versatility of flat-bed lathes

According to machine tool supplier Axe & Status, flat-bed lathes have emerged as indispensable tools that cater to a wide range of industrial applications. These machines, known for their versatility, play a crucial role in shaping raw materials into intricate components that drive industries forward. Axe & Status, which offers a comprehensive range of flat-bed lathes, dives into the multi-faceted applications of these machine tools to show why they are a cornerstone of modern manufacturing processes.

Flat-bed lathes, also referred to as engine lathes, feature a horizontal bed that ensures stability and accuracy during machining. The true essence of flatbed lathes lies in their versatility. From small-scale workshops to large-scale industrial facilities, these machines are suitable for a broad spread of applications. As well as production volumes, these machines enable the rapid turning of prototypes, playing a pivotal role in iterative design processes and allowing engineers to test and refine their ideas before full-scale production.

Tool and die makers also rely heavily on flat-bed lathes to produce moulds, dies and special tools, while repair and maintenance tasks are another application to benefit, facilitating the refurbishment of worn-out components. In educational settings, flat-bed lathes serve as fundamental tools for teaching machining principles.

Flat-bed lathes offer exceptional precision, making them suitable for projects that demand high levels of accuracy across production runs. Furthermore, these machines can execute multiple machining processes in a single set-up, reducing production time and enhancing overall productivity.

Axe & Status offers an array of options that extend from manual lathes, which allow for hands-on precision and control, through to advanced CNC flat-bed lathes that bring automation and high-level accuracy to machining processes.
For further information www.axestatus.com

Robot-loaded Nakamura just keeps running

UK subcontract machining companies do not get much bigger than Metaltech Precision in Somerset. As part of the Expromet Technologies Group, Metaltech’s 50,000 sq ft facility is home to more than 40 CNC turning centres, over 15 machining centres and a wide variety of conventional machines, fabrication equipment and metrology technology. The latest machine to arrive is a Nakamura-Tome WT-300 with an automated robot loading facility from the Engineering Technology Group (ETG).

Operations manager Steven Ward says: “A customer approached us with a substantial contract that required machining a significant number of different parts in volume. Although we have existing fixed-head and sliding-head turning centres, we’re conscious of how we utilise our personnel and the hours available to us in a normal working week. Our Nakamura solution allows us to operate well outside of the normal operating window. The cell works on the basis that the Nakamura, with its performance monitoring and Hydrafeed Robojob system, allows us to palletise either billets or we can bar-feed the machine.”

With through-spindle bar capacity options for bar feeding of 65, 71, 80 or 102 mm diameter material and a maximum turning diameter of 270 mm, the twin-spindle, twin-turret Nakamura-Tome WT-300 accommodates the bar-turning and billet-loading demands of Metaltech. Available with an option of the 15/11 kW or 18.5/15 kW spindle motor on the main and sub-spindle, and a maximum turning length of up to 780 mm, the heavy-duty Nakamura-Tome WT-300 is an all-round performer.

Discussing if the automation route is the only way to remain competitive, Ward says: “You have two expensive assets in your business, one is machinery and the other is personnel. You have to consider how you best utilise both of those assets.”
For further information www.engtechgroup.com