Compact 5-axis VMC for high-volume production

A new, 5-axis version of the existing Makino Slim3n vertical-spindle machining centre (VMC) was showcased at last year’s EMO exhibition in Milan.

Its focus is on high-volume production of complex parts and the machine is available with an optional automatic twin pallet changer (APC). Availability of the Japanese-built machine in the UK and Ireland is through sole agent NCMT.

The production centre is FEA-optimised with a fixed, 600 by 400mm table to maximise the working envelope (500 x 400 x 500mm) and provide structural rigidity for heavy payloads. Combined maximum weight of the component and fixtures is 400kg. High productivity is ensured by up to 20m/minute cutting feed rate in all orthogonal axes and 50m/minute rapids.

The tall machining area makes the VMC not only compact but is also said to be the only machine in its class able to accommodate vertically-orientated fixtures. A short spindle overhang increases the structure’s overall torsional stiffness and reduces vibration to enhance cutting performance.

The Makino HSK-A50 spindle, having constant pre-load, multi-plane balancing and reduced thermal growth, is designed for rigidity and high-speed running. Two specifications offer 16,000rpm/15kW/36Nm as standard or optionally 8,000rpm/18 kW/80Nm to cater for a wide range of machining applications. The standard 26-pocket magazine of the automatic tool changer with integral door delivers smooth, fast indexing to support high productivity.

In the 5-axis version, the Slim3n VMC gains a 2-axis CNC rotary table and trunnion arrangement, with a FANUC series 0i-MF control providing complex machining possibilities by interpolating up to four CNC axes simultaneously. A 4-axis machine version, with twin drive to the trunnion but without a rotary table, may be specified for machining heavier components or taking deep roughing cuts.

The coolant system has also been configured for the production environment, with nozzle and flush coolant as standard and a through-spindle coolant option. A chip conveyor can be integrated at the rear of the machine if the volumes of swarf generated are large.

In the APC version of the machine, pallet size is 550 by 380mm and indexing time is around four to five seconds, depending on payload. Numerous other automation options and turnkey configurations are available.

NCMT
www.ncmt.co.uk