Boring machine tackles parts up to 10 tonnes

The Hyundai-Kia KBN135 5-axis, rigid spindle CNC boring centre provides strokes of 3,000 mm in X, 2,000 mm in Y, 1,600 mm in Z and 700 mm in W axes, while its 2,000 mm by 1,800 mm NC rotary B-axis table can support components weighing up to 10 tonnes.

High rigidity was at the centre of the specification for the Hyundai-Kia KBN 135, which features closed-loop linear scales in X, Y and Z as well as a high accuracy rotary encoder for the B axis table. For 90º direct indexing, a shot pin is engaged to maximise stability under cut, especially when utilising the machine's drilling or milling off-centre capabilities.

Drive to the 22 kW, NT50 spindle - which is some 135 mm diameter - is via a four-step geared head enabling full advantage to be taken of the high torque level being developed over the 67 to 2,000 rpm speed range. Spindle cooling is part of the standard specification.

Maximum rigidity as a very stable machining platform is derived from the single structure main bed which is complemented with six supports under the saddle. To ensure optimum rigidity when the spindle quill is extended up to its 700 mm maximum stroke, it is clamped once positioned in the W axis.

Rapid traverse rates are 8 m/min in each axis and the B axis table is able to rotate at up to 0.8 rpm. It also has 0.001° indexing under control of the Fanuc 16i-M 5-axis simultaneous unit with its 10.4 inch LCD screen mounted on a 90° swivelling panel. A separate pendant operating panel is included with manual pulse generator to aid setting. Helical interpolation and tool life management are standard, and options allow the memory to be extended.

As standard, a 40-tool magazine is included with further options for 60- or 90-tool positions. Tools up to 130 mm diameter by 600 mm long and weighing up to 20 kgs can be carried; however, tools up to 250 mm diameter can be used by leaving adjacent pockets empty. There is a further option to specify an increased tool weight capability to 30 kgs.

Flood coolant is included but higher pressure 15 bar, through-coolant feed can be requested, along with facing and angle head units.

Author
Nicki McKenna

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TW Ward CNC Machinery Ltd

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