A profitable turn/mill solution
Article Type: Aerospace technology From: Aircraft Engineering and Aerospace Technology: An International Journal, Volume 81, Issue 5
The use of a 12-position, quick-change, all-driven tool turret is reported to make the Hyundai-Kia SKT 250M from Ward CNC, the exclusive UK and Ireland distributor, a cost-competitive choice for turn/mill components required in any batch size (Figure 8).
Operating at a maximum of 4,000 rev/min, the driven tools are powered by a 5.5 kW motor and tool shanks up to 20 mm diameter and rigid tapping up to M16 can be accommodated.
With a 22 kW main spindle producing 3,500 rev/min+10 in. chuck, the machine is further suited to heavier duty – and accurate – machining routines due to its heavy-duty boxway construction and high torque two-speed geared headstock. Trials have shown the SKT 250M to maintain roundness within+0.5 μm and a constant cutting accuracy of +3.5 μm.
Adding to the machine's capability is its availability as a bar-fed model for the 76 mm stock handled.
Available immediately from stock, the machine sets the benchmark in one-hit turning and milling operations by combining high power and spindle rigidity with the driven tooling, as well as via the functionality of its Fanuc 18i-TB six-axis CNC.
Of 45° slant bed design with heavy duty hardened and ground box slideways, the machine is of single heavy-duty casting design with significant ribbing to absorb vibration and it has a through bore with a large 90 mm diameter thermally symmetrical design of headstock. It has a high speed,gearless drive to generate smooth operation and enable heavy-duty cycles to be performed.
The capacity is large within a maximum swing of 750 mm and a turning length of 680 mm. Travel in the X- and Z-axes are 290 mm and 750 mm,respectively, and rapids are 20 m/min in X and 24 m/min in Z.
Included in the specification is the well-proven Q-setter for automatic determination of tool offsets, to eliminate the need for trial cuts, measurement and offset input. Options include a parts-catcher for bar feed applications,high-pressure coolant and swarf management. Automatic work co-ordinate setting is available through direct input of depth-of-cut at the CNC.
Details available from: T.W. Ward CNC Machinery Ltd, Tel.: +44 (0)114 276 5411; Fax: +44 (0)114 270 0786.
