Turning, milling and grinding operations on non-symmetrical parts weighing up to 15 tonnes

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Article publication date: 4 July 2008



(2008), "Turning, milling and grinding operations on non-symmetrical parts weighing up to 15 tonnes", Aircraft Engineering and Aerospace Technology, Vol. 80 No. 4. https://doi.org/10.1108/aeat.2008.12780dab.003



Emerald Group Publishing Limited

Copyright © 2008, Emerald Group Publishing Limited

Turning, milling and grinding operations on non-symmetrical parts weighing up to 15 tonnes

Article Type: Aerospace world From: Aircraft Engineering and Aerospace Technology: An International Journal, Volume 80, Issue 4

The latest range of elevating cross rail-type vertical turning lathes is introduced to the UK through C Dugard of Hove that provides a turning diameter up to 2.8 m by 1.6 m turning height. Spindle motors up to 75 kW via high-torque ZF gearbox with dual speed drive and the capability to carry out turning, milling and grinding cycles add to the versatility of the You-Ji range. The machines are able to carry hydraulic chucks with up to six jaws and 90° approach drilling heads can be specified as well as a grinding spindle option and automatic pallet and tool changer. There are further options of through tool coolant supply and a 25 kW live spindle.

High stability and rigidity were paramount in the heavy box-section structure of the column to support the sliding cross rail of the new You-Ji range designated 1,000, 1,200, 1,600, 2,000 and 2,500 to accommodate non-symmetrical work and heavy cutting conditions. The base is heavily walled and multi-ribbed for rigidity and to retain high-thermal stability when supporting workloads up to 15 tonnes.

The high-precision CF-axis gearbox with worm and wheel drive is able to deliver a maximum torque up to 17,500 Nm and provides a positioning accuracy of 15 sees of arc enabling multiple angles and cam shapes, for instance, to be machined. When worked in conjunction with the X- and Z-axes of the ram, the machine range can perform a more universal role of a machining centre enabling off-centre operations to include driven tools through the 90° angle head, as well as boring, tapping, U-drilling, face milling and milling in addition to conventional turning, facing and boring. Tool pre-setting and workpiece probing is available.

A BT50 tool disk magazine is standard with 16 positions and is able to accept tools weighing up to 50 kg. There are four further options of magazines with capacities of 24, 32, 48 and 60 tools. Control is via Fanuc 18i-T or Siemens 840D and linear scales are available for higher accuracy positioning as an option.

Details available from: C Dugard Machine Tools, Tel: +44 (0)1273 732286, web site: www.dugard.com

Related articles