Sliding-head, multi-spindle automatics

DMG Mori has combined the speed of multi-spindle automatic turn-milling with the versatility of sliding-head (Swiss-type) technology to launch two new machines with up to 41 CNC axes. The multis are manufactured at the group’s recently re-modernised Gildemeister Italiana factory in Brembate di Sopra.

In a compact footprint of 21.9 sq m, which includes proprietary bar magazine and high-pressure coolant system, the MultiSprint 25 and MultiSprint 36 are capable of manufacturing components from bar up to 25 and 36 mm diameter respectively. The larger machine can also turn chuck parts up to 50 mm diameter, a process that can be automated by one or two robots in the working area.
Driven tools and a 100 mm Y axis on the cross slides at each of the six spindle positions allow complex workpieces to be machined complete with up to 28 standard tools, 24 of which may be driven. X-axis travel is 50 mm, while Z-axis travel is 100 mm, or 180 mm in combination with DMG Mori’s SwissType kit. Converting the lathes for long-part turning takes less than two hours. The maximum rotational speed of the spindles is 7500 rpm, while driven tools are rated at 13,800 rpm/14.2 Nm.
For rear machining, MultiSprint machines can be optionally equipped with a pick-up spindle or one or two counter spindles, allowing cycle-time reductions of up to 35% through one-hit production, says the company.
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