Mitsubishi EDM cuts lead times

With up to 30% of its machined components manufactured from hard metals, Longford, Ireland-based N&E Precision acknowledged a requirement for EDM technology to complement its extensive CNC machine shop facilities. In September 2019, the subcontract manufacturer invested in its first Mitsubishi wire EDM machine and, such was its success that the company has now purchased a second Mitsubishi machine from the Engineering Technology Group (ETG).

Discussing the arrival of the first Mitsubishi wire EDM machine, N&E Precision joint managing director Noel Farrell recalls: “As a first-time EDM user, ETG’s Scot Elsemere was a major factor in our decision process. He provided expert advice, demonstrations and feedback. The technology and new software interface with the Mitsubishi MV2400R were also huge factors, but our decision was sealed by a number of recommendations from trusted contacts in the industry.”

With the company outsourcing a considerable amount of work, the Mitsubishi MV2400R immediately stemmed the flow.

“Our lead times for many components fell from weeks to 2-4 days, with some parts turned around in less than 24 hours,” says Farrell. “This wouldn’t have been possible with an external subcontract supplier involved.”

With the first Mitsubishi MV2400R making such an impact, the company invested in a second machine, a Mitsubishi MV1200R.
“The two Mitsubishi machines have added greater flexibility to our business,” states Farrell. “Some parts have tight tolerance bores and, instead of machining, we can put them on the EDM machines and achieve tolerances better than ±5 µm with excellent surface finishes.”

From a productivity standpoint, the Mitsubishi MV1200R and MV2400R are running across the company’s two-shift pattern, with many jobs set up to run unmanned overnight or at the weekends.

For further information
www.engtechgroup.com

Alloy Wire International is carbon neutral

Alloy Wire International has achieved a major environmental milestone to mark its 75th anniversary. This specialist producer of high-performance nickel alloys is now officially carbon neutral after it committed to several internationally approved initiatives designed to offset the emissions created at its two factories and in supplying over 5000 customers worldwide. Supported by Carbon Neutral Britain, the Brierley Hill-based company will neutralise nearly 500 tonnes of carbon it produces every year by taking an active role in certified emission reductions (CER) programmes.

For further information www.alloywire.com

Horn at EuroSkills 2021

As a silver sponsor, tooling manufacturer Paul Horn supported the CNC turning and CNC milling skills categories at EuroSkills 2021. The competition took place recently in Graz, Austria. Three young people competed in turning and seven in milling. All 10 participants each received a tool voucher for €2500 at the end of the competition to help them continue pursuing their professional passion into the future. The winners in both disciplines were from Russia. EuroSkills is a vocational European competition that usually takes place every two years, except that due to Covid-19 it was moved forward from 2020 to 2021.

For further information www.phorn.co.uk

ONA’s most advanced EDM

Three key aspects make ONA’s new IRIS its most advanced EDM machine to date: an unprecedented integration of digital tools, a powerful graphics engine together with easy-to-use touchscreen, and a 100% digital, configurable and programmable generator.

The ONA IRIS offers digital tools that include improvements in terms of data download and transfer, external connections, security, integration with other software, and remote process management. In addition, the IRIS can integrate ONA’s Security Pack, a system that allows for the creation of an administrator, the configuration of different profiles, the limiting of file modification or deletion, as well as the blocking of external access.

Thanks to its graphics engine, users will be able to simulate processes before executing them, verify results, and change the configuration as necessary, all while the machine is in full production of another job. Its large touchscreen also allows for use in tablet mode and, together with a user-friendly interface and digital JOBS manager, ONA says that customers can expect a significantly improved project management experience.

ONA reveals that IRIS has the market’s first CNC that visualises the real execution of a die-sinking job in 3D. The ONA IRIS CNC also displays 3D models of parts and electrodes in a wide variety of file formats, including STEP, IGES, VRML and BREP.

Thanks to the digital JOBS manager with user-friendly interface, operators will be able to manage everything from simple programs to complete manufacturing orders. All the information necessary to process an EDM job can be contained in the JOB, including its priority in the JOBS queue. On the other hand, the large touchscreen and the ability to use it in tablet mode will facilitate the management work of any task.

For further information
www.onaedm.com

Racing certainties

Mills CNC, the exclusive distributor of Doosan machine tools in the UK and Ireland, has recently supplied leading precision subcontract specialist, SRD Engineering, with three new Doosan machining centres. The machines, two DNM 4500 three-axis vertical machining centres supplied with Nikken 4th-axis units, and a DVF 5000 simultaneous five-axis machining centre, were installed at the company’s 18,000 sq ft facility in June 2021.

SRD Engineering’s new machines are now busy producing a range of high-precision and often complex components for customers operating in the motorsport, automotive, electronics, medical, power generation and aerospace sectors. The parts are machined in small-to-medium batches from a diverse range of materials that include inconel, titanium, stainless, steels, aluminium and plastics.

Typical components machined by SRD Engineering are characterised by their tight tolerances (8-10 µm) and exacting surface requirements (Ra 0.8 µm or better). Part cycle times vary considerably, from a few minutes at one end of the spectrum, through to over nine hours at the other end.

The parts machined by SRD Engineering are also required, in many instances, in double-quick time, especially where the motorsport sector is concerned. This helps explain why the company operates 24/5, and why it is committed to investing in technologies that improve productivity and efficiency levels.

Says Mark Bonham who, along with brother Paul, is a director of the company: “We operate in demanding and competitive sectors where quality, lead-time fulfilment and cost competitiveness are the panacea. If you are weak in any of these areas, you’ll be found out quickly and won’t last long.”

SRD Engineering was established in 1989 by Steve Bonham (Mark and Paul’s father) and two business partners. Over the last 32 years the company has changed dramatically and grown exponentially. SRD has expanded its operations considerably and relocated twice. The company now employs 85 members of staff and has, just shy, of 40 CNC machine tools at its disposal.

A constant and recurring theme throughout the company’s history is its commitment to continuous improvement and the regular and strategic investments it has made in its people, plant and equipment, as well as its processes and systems.

“To ensure that you are meeting, and hopefully exceeding, customer expectations you need to monitor and benchmark your business performance and address any weaknesses or concerns before they can impact on your ability to meet quality, lead-time and cost-down requirements,” says Bonham. “We have systems in place to ensure that this is a priority and our latest continuous improvement programme, Project 24, is a company-wide initiative that focuses on restructuring, redeployment, training and investment. It has provided the catalyst and rationale for the recent Doosan machine tool investments.”

Project 24 helped identify a ‘weakness’ in SRD Engineering’s milling section – specifically with three older vertical machining centres which, owing to their age and through constant use, were becoming more unreliable, required consistent and costly maintenance intervention and, if left unchecked, would create production bottlenecks.

To avoid production pinch points, the company decided to replace the three older machines with more advanced machine tools and approached the market to identify suitable replacements.

Says Bonham: “We are always looking to increase our machining capabilities and not just our capacity. Multi-tasking and multi-axis machine tools help increase our productivity and operational efficiencies. Being able to machine components in one hit and reduce part cycle times enables us to better meet customer deadlines. Furthermore, reducing the number of job set ups and avoiding the need to transfer jobs from one machine to another ensures that part accuracy and repeatability are not compromised.

“We approached Mills CNC with our requirements,” he continues. “We had previously invested in Doosan DNM machining centres with 4th-axis units some years earlier and, owing to the machines’ reliability and performance, decided to replace two of our older milling machines with two new DNM 4500 machining centres.”

The two DNM 4500 machines supplied to SRD Engineering are equipped with the latest Fanuc 0iMP control, 12,000 rpm directly coupled spindles, integrated thermal compensation, LM roller guideways, 30-station quick-change ATCs and Filtermist extraction systems. To increase the productivity of the machines, both were supplied with Nikken CNC202 rotary tables.

SRD Engineering is no stranger to five-axis machining and has a dedicated five-axis milling section.

Explains Bonham: “In discussing our future milling requirements and production strategies with Mills CNC’s sales and application engineers, we decided that the third machine would be a high-performance, simultaneous five-axis machining centre capable of processing a range of parts.”

The machine identified was the Doosan DVF 5000 – a compact machining centre equipped with a 12,000 rpm direct-drive spindle, 60-station ATC, linear guides, an efficient swarf conveyor system, Filtermist extraction and the Fanuc 31iB5 control.

“We negotiated a great deal with Mills and part-exchanged our three older machines for the three new ones,” says Bonham.

Key strengths and market differentiators that help separate SRD Engineering from other precision subcontractors are its commitment and ability to go the extra mile for customers, as well as its focus on growth and improvement. In recent years the application of both have seen the company invest in sliding-head lathe technology, enabling it to machine high-precision, complex components in large volumes.

From a standing start, the company now has four sliding-head lathes at its disposal. Indeed, SRD has brought many machining processes in house. To ensure quality, cost competitiveness and lead time fulfilment, the company has lessened its reliance on outside subcontractors – preferring to bring several secondary services and specialisms in-house.

SRD has also made significant improvements to its inspection and measurement capabilities. The recently implemented Project 24 initiative identified the need to further upgrade its capabilities by investing in another CMM and making its inspection room fully air conditioned.

Notably, the company stocks heat-treated materials at its facility just in case a specific Formula One customer needs components immediately.

Concludes Bonham: “Although SRD Engineering is a very different company to the one that was established 32 years ago – not everything has changed. We still operate on the same quality, lead-time fulfilment and cost-down principles that we did when first established, and our commitment to continuous improvement, as evidenced by our recent investment in three new Doosan machining centres, remains a priority.”

For further information www.millscnc.co.uk