Mills CNC has recently supplied Dyer Engineering, a precision manufacturer located in the northeast of England, with five Doosan machine tools.

The machines – three Doosan DNM 4500 vertical machining centres, one Doosan DNM 6700 large-capacity vertical machining centre and one Lynx 2100LMB lathe equipped with driven tooling and supplied with a barfeed – have been installed at Dyer Engineering’s 100,000 ft2 split-site manufacturing facility in Stanley, County Durham.
All five machines were selected for their reliability, productivity, cutting performance, competitive price, ready availability, and the service and aftersales support provided by Mills CNC. The decision to make such a significant investment in capital equipment followed an internal audit undertaken by Dyer Engineering. It was intended that the audit would identify any weaknesses or potential production ‘pinch points’ that could affect the company’s ability to meet its future growth objectives and ambitions.
Says Leigh Foulger, BatchLine Division lead: “We are committed to continuous improvement and, as such, continually monitor and benchmark all aspects of our performance. The audit results revealed that some of our existing CNC machine tools, while still performing adequately were, owing to their age, becoming less reliable and more prone to breakdown. We knew that the situation, if not addressed, would only become more acute over time and so we decided to ‘grasp the nettle’ and make the significant investment required to address our weaknesses and improve our machining capabilities in one fell swoop.”
Although Dyer Engineering does not necessarily push its machines to deliver exacting part accuracies (typical tolerances required are ±0.2 mm), they can be in operation around the clock and, as such, have to be reliable performers in order to meet OTIF arrangements made with customers.
For further information www.millscnc.co.uk

Bolton-based Silcoms supplies the aerospace industry with nickel alloy, titanium, stainless steel and aluminium engine ring components and assemblies, including seals, shrouds, segments and casings.

The company was awarded an additional contract in 2018 to supply a complex rotating fan seal for a large civil aircraft engine programme, which prompted the need for additional capacity. Managing director Jim Hill took the opportunity to develop a new process route that would speed production of the rotational titanium parts, while maintaining the tight tolerances needed.
The new method of manufacture now hinges on the use of a Hermle C50 UMT five-axis machining centre fitted with a torque table for carrying out in-cycle turning operations. Supplied by Kingsbury, the machine performs three operations in two set-ups that previously required five operations on three different machines. As a result, floor-to-floor time has been reduced, while fewer set-ups mean that the risk of accumulative tolerance error is minimal.
Produced from a titanium forging, the 1015 mm diameter fan seal has to be turned to a final wall thickness of 3 mm. Here, it is crucial to control dimensional accuracy and avoid distortion. After a number of preparatory machining stages, the Hermle five-axis machining centre completes the next five operations in two set-ups over 20 hours. Semi-finish and finish turning have been compressed into one operation on each side. During the second clamping on the Hermle, turned and milled features are completed. Critical dimensional features are held to ±20 µm over the full diameter of the part.
Says Hill: “Consolidating turning and milling on one machine has significant benefits. Apart from a reduction in component handling and an improvement in accuracy, it cuts the lead-time for converting a titanium forging into a finished seal, and reduces the total number of tools we need.”
For further information www.kingsburyuk.com