TPT November 2011

T echnology U pdate

Rotary table with large through-hole A SERVO motor-driven NC rotary table with a very large through-hole has been introduced by Kitagawa to facilitate accurate milling and drilling of tube- and shaft-type components on machining centres and manual mills. The unit, designated TG530, is available in the UK from 1st Machine Tool Accessories (1st MTA). The mechanical structure of the TG530 is designed to withstand the heavy cutting torques (up to 2,600Nm) required to machine tough materials used for some aerospace components. Hydraulic clamping torque is high at 6,100Nm, to allow heavy static machining.

1st MTA is a supplier of workholding and machining accessories, including collets; chuck jaws; Kitagawa, Bison and Talleras de Guernica chucks, rotary tables and vices; Chick and Tecnomors workholding equipment; Abbott and Leave fixturing and clamping products; Darex tool sharpeners; OK-Vises; Brighetti reduction bushes; CoolJet high pressure coolant systems; Micromag filtration units; machine mounts; and Overbeck de-burring twister lathes. 1st MTA’s extensive stock holding is backed by warranty and service provided by a dedicated team of technical engineers. Demonstrations of selected products are available from external sales specialists on request. 1st Machine Tool Accessories Ltd – UK Fax: +44 1725 512529 Email: enquiries@1mta.com Website: www.1mta.com

Of rigid build for top machining accuracy, the unit weighs 366kg, one- third less than the equivalent model in the Kitagawa TR table series, which has a through-hole only half as large. Lower rotary table weight means that heavier components can be machined without exceeding the maximum table load of the machine tool. Centre height is 310mm, maximum rotational speed is 11.1rev/min using a gear reduction ratio of 1/180, and indexing accuracy and repeatability are 20 and 4 seconds of arc respectively. The unit can be mounted vertically or horizontally, with maximum permissible component weight being 350 and 700kg respectively.

The 345mm diameter hole through the centre has been sized to accept pipe up to 340mm (13 3/8 "), which is a standard used in the oil and gas industry for applications such as borehole casing.

The new Kitagawa TG530 NC rotary table from 1st MTA

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Impeder core for high frequency welding of tubes

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N ovember 2011

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