In response to customer requests for an even smaller, low cost VMC, a 'mini-mill' is designed for medium to large batch production uses that may require numerous tool changes,

The new XYZ Mini Mill 450 is a smaller version of the best selling (more than 250 machines installed in the UK to date) XYZ Mini Mill 560 compact vertical machining centre introduced in 2003. A response to customer requests for an even smaller, low cost VMC, the 7.5HP, 60-8000 rev/min Mini Mill 450 features a solid cast construction and weighs in at 1900kg within a 1.8m by 1.6m footprint. As well as providing a level of rigidity that is second to none, the new machine's box slides are induction hardened, ground and Turcite coated to ensure smooth running and a high quality surface finish.

Designed for medium to large batch production applications that may require numerous tool changes, the Mini Mill 450 has a working envelope of 450mm (X), 320mm (Y) and 380mm (Z), and rapid traverses of 20m/min.

Maximum cutting speed is 10m/min.

Equipped with a 530mm by 320mm table, the Mini Mill 450's BT40 spindle nose, 10-position tool magazine, auto lubrication and flood coolant complete a 'ready-to-go' package.

An added attraction is the choice of control, either the conversational XYZ CNC-7 or the G Code Fanuc Oi Mate, while a new five-axis option offers significantly reduced set-up times and fixturing requirements.

Two days' operator training is provided free of charge, and the new Mini Mill 450 is backed by XYZ's 'no quibble' guarantee.

What is probably the largest and most sophisticated ram-type horizontal boring and milling machine in Europe is generating equally massive benefits accrued from 'one-hit' machining.

The GBP 1.4 million investment by RWE Power International, TSG Ferrybridge in what is probably the largest and most sophisticated ram-type horizontal boring and milling machine in Europe, a 16m X-axis capacity Union PCR 150 ram-type machine with live spindle and head changing supplied by Ward CNC of Sheffield, is generating equally massive benefits at the West Yorkshire, UK, site - in one case, the one-hit machining from solid of a large gearbox coupling, the machine has slashed lead times from seven weeks down to an amazing seven days. 'Indeed, compared to the two ageing machines it replaces, the new Union is completing in a single shift what used to take a week on the two older Union borers it has replaced,' says process co-ordinator Craig Bill, who adds that the machine has provided the company with an unprecedented level of milling and boring capability and flexibility, with which any other UK company, at least, cannot compete. With complementary Y and Z axes traverses of 4000mm and 1000mm, respectively, plus a 700mm W-axis (spindle) stroke, coupled with twin 40- and 24-tool toolchangers and axis feed rates and rapids of 5-15000mm/min and 15m/min, respectively, the machine can accommodate workpiece loadings of 70,000kg on a traversing and rotating CNC table, so clearly has the capacity to satisfy every machining situation likely to come its way.

But Bill also emphasises the machine's ability to quickly and easily utilise and change between different machining modes as the factor that, he says, 'Effectively transforms what is on paper a six-axis milling and boring machine into an unrivalled and highly productive 11-axis machining centre.' Also supplied with the machine by Ward CNC is the automatic accessory changer that comprises: * A linear motor Cytec gyroscopic two-axis milling head with built-in high-speed electro spindle and served by its own dedicated toolchanger.

* A D'Andrea UT5 800S CNC facing and profiling head with 1000mm facing capacity.

The machine specification is further enhanced with the integration of the 70 tonnes loading capacity Eimeldingen heavy-duty rotary and traversing CNC table, extensive floor plates and zoned guarding allowing the machine to be efficiently set up for pendulum or three-zone machining.

Bill emphasises that such has been the impact of the machine specification and the flexibility offered by the accessory changer system, combined with the inherent power and productivity of the Union machine that, as a result, 'We are able to finish machine component features in a single set-up that would have been very difficult, perhaps even impossible, to achieve any other way.' One example of this concerns the production of a hydro power industry 3200mm by 3400mm by 3000mm main inlet valve (weighing 73 tonnes in finished state) and its accompanying 2500mm diameter by 350mm thick main service seal (reverse engineered and machined from stainless steel).

A number of holes are drilled, tapped, counterbored and thread milled in the bore 'outwards'.

'Without the flexibility of using a variety of heads, we would find it very, very hard to produce these features,' Bill confirms.

'When we decided to replace the two old boring machines, we looked at other boring and milling machines and their suppliers,' continues Bill, 'But the Union PCR and Ward CNC won the contract based on a combination of machine capability, capacity and price as well as on Ward CNC's ability to provide the level of support we needed.' Of heavily ribbed design with three-way, backlash-free, heavy-duty compact roller guide system for highly-accurate guidance of the crossslide, the sturdy machine bed is complemented by a similarly constructed box-type column.

The column saddle also features compact roller guides as well as ballscrew drive for transverse movement.

The vertically travelling headstock with axially traversing ram (Z-axis) accommodates the high-precision main spindle system featuring preloaded spindle bearings with lifetime lubrication.

Speed range changes are catered for by a two-step gearbox having hardened and ground helical gears, and a hydrostatic guiding system of the ram with drop compensation in relation to longitudinal displacement, together with an additional mechanical compensation system, ensures high and accurate cutting data.

For example: * X, Y, Z and W axes positioning of +/-0.005mm (up to 800 mm), +/-0.008mm (to 5000mm) and +/-0.012mm (to 10000mm).

* Repeatability of +/-0.003mm.

The Union was installed as part of the RWE npower company's GBP 3.5 million CNC machine tool investment programme last year as the platform for the company's strategic move into the wider arena of sub-contract machining, based around a quick-response machining service for customers in industries such as oil and gas and automotive.

These sectors have been identified by Bill and the TSG Ferrybridge team as ideal to complement and build on the company's core (and established) skills applied since 1974 in the refurbishment of power station equipment, including rotors, valves, pumps and gearboxes and, in particular, turbines and turbine blades.

RWE Power International, TSG Ferrybridge was established as one of three sites to perform such work for power stations within the RWE group, as well as third party sites (basically, the company has worked on equipment at every coal, gas and hydro/wind power station in the UK).

'We were spending a lot of money on turbine blades,' continues Bill, 'And basically reckoned we could save a lot of cash, and produce the blades quicker, if we did it ourselves.' In some cases a single, large turbine blade could cost GBP 36,000.

That is not surprising when it is realised that the leading blade on a large 5m diameter rotor, revolving at 3,500 rev/min, is actually moving at twice the speed of sound - so the blade has to be right.

Since then, the operation has progressed to a GBP 52 million turnover concern, and involves up to 350 people.

Aside from its high-tech turbine blade high-speed machining production facilities - including the development of a innovative and patented 'blade cropping' process - the company has an impressive range of machine tools throughout its three large workshops alongside the Ferrybridge C power station in West Yorkshire.

In conjunction with a general fitting and assembly area - housing press, welding, heat treatment, grit blasting, NDT, grit blasting and 120-tonne gas turbine rotor de-stacking - the light and heavy machine shops accommodate a wide array of CNC machines.

These extend from milling, turning and machining centre capacity through to 25 tonnes vertical borers and large capacity lathes, including a Safop 100 tonnes capacity machine able to handle 17m between centres.

In addition, the company also offers an on-site machining service, which utilises a battery of 'mobile machine tools' to enable customers' fixed plant and equipment to be re-machined, refurbished, repaired or modified in situ.

While the large capacity Safop is currently being targeted to 'partner' the Union PCR to further extend the machines' capabilities by linking the two via existing Unigraphics/Vericut CAD/CAM facility, Craig Bill and the team have other plans for Union, to further reduce lead times and so magnify the enormous savings already being made.

The idea is to use additional floorplates to enable component set-up to be performed offline, then to lift the complete fixture, with component, into position and ready to machine.

Commenting that the Union has lived up to everything - and more - that Ward CNC said it would, Bill also reflects that the level of service and support provided around the machine has been exemplary.

One measure of this, he concludes, is the fact that when RWE Power International wanted to move a pair of horizontal table borers and replace these with a horizontal machining centre, he had no hesitation in selecting another machine from Ward CNC: a Toshiba twin-pallet model from the Sheffield machine tool specialist's extensive stock of high-quality used machines.

Latest generation of vertical milling machines are characterised by long axis travel, a compact design, excellent performance and highly attractive starting price.

The latest generation of DMC V vertical milling machines from DMG has a terrific pedigree. Its forerunners, the DMC 63 and 103V, were worldwide best sellers and now with a bundle of high-tech features three new models are set to uphold the trend. With bigger tables and smaller footprints, these new verticals - the DMC 635/835/1035V - have been designed to provide a rapid return on investment.

The machines are characterised by long axis travel, a compact design, excellent performance and highly attractive starting price (UK) of GBP 39,950 for the DMC635V machine.

They shave 20% off the production time of a typical job providing excellent value for money especially as an alternative for flexible single part machining and small to medium batch production.

The models only differ in the size of their working area; the largest machine in the range allows a work piece up to 1,000kg to be accommodated.

Increased output is achieved with spindle speeds of 8,000 rev/min spindle - 12,000 rev/min optional - a direct drive on the main spindle and rapid traverse speeds of up to 30m/min.

A 20-station tool magazine has a double gripper allowing tools to be exchanged in just 1.6 seconds.

This ensures fast chip-to-chip times - typically 5s - and high flexibility.

The stable C-frame maintains maximum rigidity to deliver the highest milling precision.

This is complemented by roller guide ways on all axes.

The proven 3-point support simplifies installation and greatly reduces set-up time.

Completing the package is the choice of Siemens, Heidenhain or Fanuc controllers that are all characterised by their ease of use, fast processing, 15in TFT screen and supporting 3D software.

The DMG Powertool range of software products may also be specified so that the machine can be individually configured for maximum performance.

Fast and direct network integration is facilitated by serial and Ethernet ports.

Any model in the new DMC V range can also be equipped with chip conveyor, parts washing system and coolant/air switch to increase process safety and reduce maintenance.

In addition to the optional 12,000 rev/min, greater performance and precision can be achieved with a 30-station tool magazine and linear measuring system.

Further enhancements include an internal cooling unit and chip conveyor or a bed-flushing unit.

Fully automated tool handling can also be specified for unattended operation.

A 60 per cent increase in enquiry numbers compared with the previous MACH was experienced by XYZ Machine Tools.

'A great success' is how Nigel Atherton, Managing Director of XYZ Machine Tools, describes MACH 2006, and with a 60 per cent increase in enquiry numbers compared with the previous MACH he has good reason to be pleased. Even more encouraging is the value of orders actually placed during the exhibition, which at close to £400,000 also represented a significant increase, and the positive response of visitors to the many new additions to the company's product portfolio. One customer specialising in high quality open die hammer forgings placed an order for a 50 hp,1.5 m between centres, XYZ XL 1500 CNC lathe, one of several models in the Burlescombe, Devon company's new range of 'extra large capacity' turning machines.

Another customer, a sub-contractor, that in addition to sheet metal fabrication also undertakes precision machining, opted for the recently-introduced 9 hp, 8000 rev/min, XYZ Mini Mill 450 compact vertical machining centre.

And a defence equipment OEM signed on the dotted line for a 7.5 hp, 2500 rev/min, ProTURN SLX 1630, the latest addition to the XYZ range of manual/CNC lathes, and also for the new XYZ VMC 710, a 15 hp, 8000 rev/min, vertical machining centre with 4th axis rotary table option.

'I am confident that the next few weeks and months will see many more orders placed as a direct result of taking part in MACH 2006,' says Nigel Atherton, 'and this fully justifies our decision to take our largest-ever stand at a MACH show.

With 23 machines under power - including several new models of machining centre; our new Mini Turn entry-level turning centre; the recently-introduced CNC bridge mill; and the new range of 'extra large capacity' CNC lathes - we were in the ideal position to demonstrate that when it comes to metal cutting, XYZ offers a comprehensive range of machine tools designed to increase productivity, reduce costs, combat skills shortages and provide a competitive edge.