A successful large-scale mill-turn project

Soraluce customer, Krones, from Neutraubling, Germany, required a mill-turn machine with a fixed portal and two movable milling and turning rotary tables, each with a diameter of 6 m, in double-table design and a high degree of automation. To complicated matters, the project commenced in the middle of the Covid-19 pandemic.

All arrangements could only take place by telephone and video call – a visit to the manufacturer´s plant or to the customer during the decision-making phase of the investment was ruled out for safety reasons. The customer´s concept was supported by figures, data and 3D simulations, but finally seeing the finished machine, a PR 6000 2T, after the months of planning and discussion – 32 m long, 14 m wide and weighing just under 300 tonnes – is a whole different story. It is not just a large portal milling and turning machine, but one of the largest machines with a double-table design in Germany.

While machining on one milling and turning rotary table, set-up can take place on the other. At Krones, the company uses the machine to produce roundels for bottling in the food industry. With a tool-change system featuring 500 tools and an ABB robot for the changeover, the degree of automation is optimal. Process control comes courtesy of a Siemens Sinumerik One CNC. Soraluce created a digital twin for the plant that simplified and shortened commissioning on site considerably.

A follow-up order for a fully automated production line with three portal milling and turning machines connected to a large pallet station and central tool magazine, confirms the confidence in Soraluce. Machine tools from Soraluce are available in the UK from TW Ward CNC Machinery.
For further information www.soraluce.com

Supersizing Wind Power Production

Denmark-based HACO A/S has invested in two large-capacity Droop+Rein portal-type machining centres from Starrag to meet the rising demand for components for larger offshore wind power turbines having outputs of up to 16 MW. The new machines will perform the complete machining of components such as rotor housings (with diameters up to 10,000 mm; though sizes up to 11,500 mm are also now under consideration), as well as front and stator sheets, brake discs, and other components. HACO’s ‘supersizing’ of its production enhances its established (60 years) contract manufacturing success.

When it comes to wind power, Denmark is leading the way: electricity generated by wind power fulfils 40% of the country’s energy requirements, and HACO’s prime customer, Valmont SM A/S, is a leader in the supply of steel components to the wind-power sector.

HACO currently processes around 10,000 tonnes of high-strength steel each year, but the wind-power sector is now also looking increasingly at the use of aluminium alloys, castings and composites, so the company’s investment in the two new machines was taken with these materials in mind.

The choice of Droop+Rein machines for this significant investment was based on HACO’s long-standing experience with Starrag on machine reliability/longevity, customer service, machine price and the delivery schedule of the new duo. Until now, Valmont has been transporting the welded blanks to HACO’s site 100 km away but, with this multi-year contract now embracing larger components, the two companies have decided on a more sustainable form of collaboration which sees HACO establishing a subsidiary plant for the two new machines close to Valmont’s HQ, which is near the sea to allow convenient shipping.
For further information www.starrag.com

Entry-level machine with large Y-axis stroke

Mazak has responded to market demand for a high-specification entry-level machining centre with a large Y-axis stroke by launching the new VCE-600.

For its category, the UK-built VCE offers a generous table size of 1300 x 600 mm with a large machining envelope, while retaining a compact floor space. Specifically, the VCE-600 offers increased versatility due to its X, Y and Z-axis travel of 1050, 600 and 600 mm respectively, maximising space for workpieces and fixtures.

With productivity at the forefront, the new VCE boasts a 12,000 rpm/18.5 kW/119.4 Nm spindle with an electronic two-speed shift. This specification makes it a versatile choice for a range of materials, with power and speed for machining non-ferrous materials and torque and power for steel.

The VCE-600, the first model of a new range of vertical machining centres, is produced to Mazak’s global manufacturing standards with no compromise on build quality. According to the company, the level of specification mirrors that usually found on premium-priced machines and includes pre-tensioned ballscrews, direct-coupled servomotors and linear roller guides on all axes, resulting in high-accuracy agile machining performance with 36 m/min rapid feed rate on all axes. The machine is equipped with a 24-tool magazine as standard, with options available for 30 and 48 tools.

Mazak’s VCE-600 is equipped with Mazak’s latest CNC, SmoothEz, a high-specification CNC developed for entry-level machines that offers intuitive programming to deliver increased productivity through faster set up, programming and operation.

The 15-inch touchscreen enables programming in two languages, Mazatrol and EIA/ISO for G-code, and is customisable to the operator’s own preferences with a full keyboard.
For further information www.mazakeu.co.uk

Good service leads to repeat HMC sales

When Autocraft Solutions Group, Europe’s largest independent engine builder and remanufacturer, purchased the land and assets of an existing but redundant machine shop in Wellingborough, in June 2018, the company retained four existing Heller four-axis, twin-pallet horizontal machining centres (HMCs) that were already on site. Within weeks, Autocraft was using them to produce cylinder heads and blocks both for its own engine assembly and for delivery to its customers’ production lines on a just-in-time basis.

Autocraft co-owner Mike Hague-Morgan says: “Once we started using the Hellers, we saw how quickly they responded to our requests for aftersales service, including the supply of replacement spindles within 24 to 48 hours. It gave us such a high level of confidence that we decided to take all the stock out and purchase additional Heller HMCs to produce more parts, increasing our profitability.”

Autocraft produces cylinder heads and blocks in medium to low volumes for a range of three- to six-cylinder inline and V6 to V12 engines for automotive and off-highway applications. The four Heller H2000 machining centres were soon joined by another three. Then two further orders, each for three more, were placed during the pandemic to bring the total to 13.

Hague-Morgan says: “During an incredibly difficult trading period, we were still able to grow the business partly because of the service level provided by Heller. We deliver hundreds of engine blocks per week to major production lines and it costs millions of pounds if they stop, so continuity of supply of heads and blocks is critical. Having machines up and running within a day or two after a spindle failure is worth a huge amount to me.”
For further information www.heller.biz

Getting to grips with forged hand tools

The use of a Heckert H55 machining centre from Starrag has enabled renowned hand-tool manufacturer SWM to not only reduce cutting times by around 40% on certain parts, but identify new machining concepts there were previously impossible.

By way of example, SWM recently recognised the potential to optimise the production of its large pliers. Clamping of the plier heads was taking too long, as was the milling of these workpieces due to the limited spindle speed available with existing machinery, which also severely limited product variety and made retooling very time consuming.

The way to shorten the production process – to 30 seconds per plier head – and minimise the set-up times of 26 different workpieces was, SWM discovered, to capitalise on the capabilities of a Heckert H55 machining centre boasting high levels of rigidity (and therefore accuracy), fast traverse rates of 80 m/min and an ability to handle loads of 800 kg on pallets of 500 x 500 mm (optionally 500 x 630 mm).

But why use such a high-precision machining centre on components where tolerances are usually only a few tenths of a millimetre? In SWM’s case, machining accuracy was not the decisive factor; what is important is machine stability (for machining repeatability) and flexibility (to handle a range of component types/batch sizes), as well as the need for minimal space requirements (the H55 is a compact machine occupying a floorspace of just 6.8 x 2.9 m).

Another example of the benefits to SWM of the Heckert machine concerns certain very large parts that previously required half a shift to machine manually. Today, because the Heckert table can easily handle the required half-tonne fixture, it enables the company to redeploy the machinist formerly required.
For further information www.starrag.com