First indexable drill for 7xD hole depth

The CoroDrill DS20 from cutting tool and tooling system specialist Sandvik Coromant is said to be the first indexable drill concept capable of producing hole depths up to 7xD.

Replacing the existing CoroDrill 880 and CoroDrill 881 tools, 4-5xD CoroDrill DS20 indexable drills provide tool life improvements of up to 25% and productivity gains up to 10%, depending on workpiece material, reports Sandvik Coromant. However, the 6-7xD variants represent an entirely new capability range of indexable drills. To complement the introduction, the company is releasing a new Modular Drilling Interface (MDI) that acts as a coupling between the drill and adaptor. Available in Coromant Capto and HSK shank types, the MDI provides high precision, good centring capabilities and reduced tool inventory.
“Among the most important factors when drilling to depths of more than 5xD is controlled cutting forces, secure chip evacuation and high centring capabilities,” explains Håkan Carlberg, senior R&D engineer – indexable drilling at Sandvik Coromant. “Going from a 5xD to a 7xD drill, the theoretical difficulty increases approximately three-fold due to an increased inclination to bend. Designing a CoroDrill DS20 7xD drill requires careful consideration for around 50 parameters that all depend on each other. The outcome is improved process security through lower forces and lighter cutting, particularly at entry. In turn, users achieve lower cost per hole, the ability to drill deeper and reduced sound levels.”
The drill body is strong and fatigue-resistant with higher levels of stiffness than ever achieved before, while chip flute shapes are individually designed for each drill size and insert. This combination of factors leads to less vibration, predictable wear patterns and increased tool life.
For further information www.sandvik.coromant.com

Mapal casts success on automotive specialist

Welshpool-based Castalum, which is currently one of the largest die-casting companies in the UK, is relying on tooling solutions from Mapal to help it control cost per part for the products it supplies to the automotive sector.

Referring to the relationship with Mapal, Peter Radcliffe, chairman at Castalum, says: “We went into machining absolutely from scratch. However, we knew that Mapal were a good option in terms of quality and what they could supply in regard to both their advice and their tooling. So, we immediately chose them as a partner and it’s something we’ve never regretted. Right now, Mapal do not only supply us with tooling, they provide concurrent engineering advice for practically every quotation request that passes through the company.”
Mapal’s Ted Coyle adds: “When I first became aware of Castalum many years ago, they were only involved in castings. They then diversified into machining as many customers were asking for this service. Castalum got involved with Heller Machine Tools and their first job was a turnkey project. Heller works extensively on machining solutions for castings, like those undertaken at Castalum with Mapal on PCD tooling.
“We did the tooling on those initial projects and Castalum were then interested in approaching jobs on a ‘cost-per-piece’ basis,” he continues. “So, we came up with an offer to do components on this premise. The first work was the Trag 6 piece clutch housing. That worked very well and from there on in, we then started doing every project at Castalum.
“The next job was a BMW steering housing and then we did the MT82 gearbox rear case, the Georgio clutch/rear housing, and the B6 Plus, which is a larger derivative of the original B6.”
For further information www.mapal.com

EDM boosts quality and lead times

Excel Precision Group has enhanced its wire and spark erosion capabilities by acquiring two new Sodick machines from Sodi-Tech EDM. Installed at the company’s Gloucester facility, which has AS9100 rev D and NADCAP AC7116/3 Rev B approval in place for both spark and wire erosion, the arrival of the Sodick ALC600G wire EDM and AG60L die-sink EDM will underpin a number of important contracts across both the civil and military aerospace markets.

Established in 1978, Excel Precision Group operates from two modern facilities in Gloucester and Leeds, which together house over 30 CNC wire and spark erosion machines. This capacity, along with its accreditations, make Excel one of the leading EDM subcontract operations in the UK, with particular emphasis on aerospace and defence.
“Few EDM subcontractors have both AS9100 and NADCAP approval,” states Steve Batt, operations director at the Gloucester facility. “This level of process control allows us to serve an extensive number of aerospace and defence customers. In addition, we currently hold company approvals from BAE Systems, Rolls-Royce, Goodrich, Safran Landing Systems, Dowty Propellers, Messier Dowty, MT Satellite, GE Aviation, Moog Aircraft Group, UTC Aerospace Systems, Mettis Aerospace and Triumph Actuation Systems.”
Along with the need to replace older machines, part of the reason behind the company’s investment in Sodick technology was due to the imminent ramp-up of an existing defence contract that is currently scheduled to run until 2022. An NDA has been signed, so details are scant, but the parts involve the intricate wire erosion of titanium stock.
“We looked at both Sodick and our existing supplier of EDM machines, but the test cuts provided by Sodi-Tech EDM were simply better,” says Batt. “In particular, the surface finish produced by the AG60L spark eroder really caught our attention. Due to the presence of debris, some machines struggle to replicate the surface finish achieved on the sides of parts, on the bottom face. However, this proved no such issue for the AG60L.”

Excel Precision’s AG60L has been set to work producing a variety of aerospace parts, including stainless steel actuator components. In total, the aerospace sector commands about 40% of the machine’s time. The other Sodick machine, the ALC600G wire EDM, has around 50% of its output sent to aerospace customers, including the titanium defence part.
“Compared with our old machines and process, using the ALC600G has transformed our operation for this component,” says Batt. “For a start, we previously needed two machines, whereas now the part is completed in its entirety on the ALC600G. Also, our old machine would only achieve a 90% pass rate on an angled face with a
5 µm tolerance. With the Sodick machine, the pass rate is 100%. That step-up in quality makes a real difference on high value-added parts such as these.”
Excel Precision is currently tasked with producing 200 of the titanium defence parts every month, although this figure will shortly rise to 600. Using the ALC600G, the company can produce around 24 per day. However, with work for other sectors, both Sodick machines run 24 hours a day, four days a week, with long cycle-time jobs loaded at the weekends. Aside from aerospace and defence, the company serves further high-end industries such as motorsport, nuclear, oil and gas, and medical.
“We’ve not had Sodick machines at Excel since before 1995, but we’re very pleased to make the switch back,” says Batt. “The technology has moved on considerably and we cannot fault the machines or the team at Sodi-Tech EDM, who have been very supportive since installation in early 2019. Through our own mistake, we once accidently set off the fire extinguisher on the AG60L, but the response was excellent and we were back up and running the next day.”
Excel Precision actually began life in Leeds, but started the Gloucester operation seven years ago through acquisition. The machines at Gloucester were around 20 years old and the company has since been progressing its way through a steady replacement programme.

“One thing we’ve noticed is the compact nature of the Sodick machines,” says Batt. “We were able to fit both Sodicks into the space previously taken up by one older EDM. Also, while we didn’t buy the machines for speed, it’s difficult not to notice the gains we’ve achieved. The titanium defence part previously had a cycle time of 65 minutes, but it’s completed in just 35 minutes on the ALC600G wire EDM, a 46% improvement. As for the AG60L die-sink machine, the results we get, particularly on deep cavities, is like nothing we’ve seen before. We have also reduced our electrode consumption dramatically; we now complete many jobs using just one electrode.”
Good growth over the past two years has seen Excel Precision Group hit an annual turnover of £2m, and more growth is expected moving forwards.
“There are many factors that set us apart from competitors, not least the capacity we offer and the accreditations we hold,” concludes Batt. “In addition, we believe the level of work and service we provide is second-to-none. It’s all about quality, on-time delivery and customer communications, all backed up by investing in the latest technologies.”
For further information www.sodick.org

Barnshaws delivers rolled steel cylinders

The Hamilton branch of metal-bending expert Barnshaws has delivered 11 rolled steel cylinders to form two deaerator vessels destined for the Johan Sverdrup oilfield in the North Sea.

Work had to be carried out within three weeks, meeting transport arrangements and ensuring the deaeration vessels could be installed on the offshore platform as quickly as possible. Barnshaws rolled 35 tonnes of steel plate at 16 mm thickness to a diameter of 3.8 m, producing the 11 finished cylinders. Offshore platforms are hazardous working environments where safety and space efficiency are of the utmost importance, so the rolled cylinders had to adhere to stringent quality levels.
For further information www.barnshaws.com

XYZ to host seminar at the MTC

XYZ Machine Tools is hosting a seminar to highlight the future of five-axis machining and robotic machine tending in collaboration with the MTC (Manufacturing Technology Centre) in Coventry on 17 October.

The event will include presentations from leading figures involved in five-axis machining and robotics. Speakers will include: James Selka, chief executive at the Manufacturing Technologies Association; Mike Wilson, managing director at Kuka UK; MTC chief engineer – intelligent automation, Jeremy Hadall; Paul Stout, managing director of Adelphi Automation; Juan Martin, European five-axis technical director at Buffalo Machinery; and Jonathan Theobalds, managing director at Rivercircle.
Demonstrations will also be carried out on the new robot-centred XYZ Robo-Tend mobile machine tool automation system, as well as the XYZ UMC-5X simultaneous five-axis machining centre. The day will be split into two session, morning (09:00) and afternoon (12:00), so visitors have a choice of which to attend.
For further information www.xyzmachinetools.com