Archive for the ‘Vertical machining centres’ Category

Holroyd Precision, part of the Precision Technologies (PTG)

Saturday, March 21st, 2009

Rotor milling machine for screw rotor production.Holroyd Precision, part of the Precision Technologies (PTG), has announced a GBP2.4m order from a south east Asian customer for a Holroyd 8EX rotor milling machine.

Due for delivery in February 2009, the 8EX machine has a swing of 900mm and will used for the production of screw rotors for the gas-processing industry.

The rotors, each five weighing over six-tonnes, are manufactured from stainless steel to enable them to resist corrosion from the aggressive waste gases from a Styrene manufacturing method.

Prior to placement of the order, the Precision Components Division of the PTG Group proved the machining process for the large screw rotors, by producing pilot batches for the customer.

In all their operations the machines deliver nice performance and repeatability due to their build quality, high-speed dry milling scheme and advanced technology, including on-machine probing.

In addition to machining complex helical profiles on rotors and pump screws, the EX series machines are equally proficient at producing gear parts such as worm shafts.

they also improve productivity in all manufacturing environments, with a combination of high-speed operation, menu-driven Holroyd touch-screen control process (or optional Fanuc CNC), quick-change tooling, high-power spindles, rigidity and complete integration with automated parts-handling systems.

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Mills Manufacturing Technology has launched the DNM range of Doosan vertical machining centres in the UK and Ireland

Tuesday, March 10th, 2009

Mills Manufacturing Technology has launched the DNM range of Doosan vertical machining centres in the UK and Ireland.

The DNM machine range is aimed at precision component manufacturers and toolmakers.

The range consists of two models – the DNM 400, DNM 500 and DNM 650.

The machines have a rigid design and construction, which delivers improved vibration absorption capability.

Machine beds, manufactured from heavily ribbed Meehanite, and column assemblies have been designed for trouble-free, high-speed and heavy duty machining operations.

The DNM machines are kinematically sound.

All machines in the range have a generous working envelope, enabling large parts and/or multiple parts to be machined.

Tables are fully supported by the saddle and there is no table overhang, which ensures higher accuracy.

DNM machines are equipped with high-quality spindle technology.

The high-speed 40-taper spindles provide users with high torque capability (18.5kW 12,000rpm) that delivers 106Nm.

Power is transmitted via a heavy duty cogged drive belt that ensures thermal stability and maximum vibration.

Spindle and machining performance is further ensured by the dual contact system (Big Plus) between the spindle face and toolholder flange.

The DNM machines also feature linear guide ways and high-speed servo motors that enable fast axis movement (36m/min on X- and Y-axes; and 30m/min on Z-axis), which in turn reduces non-cutting times.

Speed is also evident in the machines’ 30-tool position ATCs (40-position option), which has a 1.3s tool modify time.

The performance of the DNM machines can be further improved by a range of options that include: fourth-axis preparation; automatic tool and workpiece measurement; chip conveyor; and a through-spindle-coolant system.

The machines are equipped with the Fanuc I-series control and are supplied with a number of fully functional and user-friendly Doosan program programs for fast job set-up, real-time monitoring and intervention, and improved process reliability.

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Kalstan Engineering has installed a Dugard Eagle 1000 vertical machining centre

Tuesday, March 10th, 2009

Managing director Stephen Kalmar believes that as a result of the extra capacity provided by the machine supplied by C Dugard – in terms of both the size of components that can be processed on the 1200mm by 540mm desk as well as the amount of work that it absorbs – his company is now well positioned to move forward by securing new business for medium to large milled parts.

Kalstan Engineering has installed a Dugard Eagle 1000 vertical machining centre (VMC) to solve a series of downtime problems & inadequate CNC machining capacity.

‘To avoid the continual hiccups they are encountering on our two smaller VMCs, I was careful in my choice of machine & supplier.

‘Having witnessed the trend for turned parts &, increasingly, smaller prismatic work being sourced overseas of late, predominantly from China, they knew they had to invest in larger milling capacity if they were to remain in business as a precision subcontract operation,’ they said.

‘The Dugard Eagle 1000 had all the main attributes I was looking for.’ The Dugard Eagle 1000 has an integrated coolant flushing system, an augers & swarf conveyor & includes a PCM card.

‘In particular, I had to ensure that it would be able to cope with the amounts of swarf that are evident when machining aluminium, & be able to handle the size of program required by larger & more complex workpieces.

‘Its 12,000rev/min spindle, chiller & powerful coolant pump also added to an impressive specification that includes a positional accuracy of three microns & a repeatability of +/-0.002mm,’ added Kalmar.

The Eagle 1000 can accept loads up to 600kg on the desk & has fast traverse rates of 30m/min in X & Y-axis & 24m/min over the 510mm Z-axis stroke.

Through the device coolant, a choice of spindle probing, device setting probes & automatic device length measurement are also obtainable.

A 20-station device carousel is supplied as standard; however, options for 24- or 32-station magazines are obtainable for tools up to 76mm diameter.

‘The Dugard Eagle was just what they needed to satisfy the demand for larger workpieces from existing customers at home & abroad,’ added Kalmar.

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