Product category:
CNC automatic lathes
News Release from: DMG (UK) | Subject: CNC single- and multi-spindle automatic lathes
Edited by the Manufacturingtalk Editorial
Team on 17 October 2007
CNC automatic lathes up speed,
flexibility
Italian builder of CNC automatics introduced advances in the design and control of CNC single- and multi-spindle lathes as well as multislide machines, all developed to raise output and flexibility.
At EMO 2007, Gildemeister Italiana, or Gital, showed six CNC automatic lathes for the first time They were the Sprint 20 linear and Sprint 50 linear automatic lathes, the GMC 35 linear/ISM and GMC 42 linear/ISM multi-spindle machines, and the MSL 42 and MSL 60 CNC-controlled multislide automatic lathes
This article was originally published on Manufacturingtalk on 21 Jun 2001 at 8.00am (UK)
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They are intended for the market sector, in which countless older single-spindle automatic lathes are still being used worldwide.
The MSL machines possess a more convincing cost/performance ratio.
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The MSL 42, for example, will be available in its standard version already for less than EUR 80,000.
The standard versions of these automatic lathes include six CNC axes and four tool stations for simultaneous machines, as well as two compound slides.
As well as the standard version of MSL machines, Gital offers an advanced version with three compound slides and a turret with an integrated pick-up spindle.
In addition, the advanced version offers a greater tool capacity of up to 14 tools, as well as the possibility to use three of these tools for back end machining.
Maximum flexibility and a high level of performance are offered by the combination of CNC tool adjustment units for compound slides 2 and 3 and the turret.
This equipment also allows internal CNC turning applications, milling applications on the Y-axis (optional) and complex turning operations for back end machining.
Gital's Bergamo, Italy, factory expects output of the MSL range to exceed 200 units/year in the mid-term, said the company at EMO.
* Multi-slide automatics, Sprint 20 linear and Sprint 50 linear - Gital told Manufacturingtalk that it expected the Sprint 20 linear and Sprint 50 linear to grow in production.
The Sprint 20 linear is aimed at the precision machining of smaller work pieces up to 20mm in diameter, while the new Sprint 50 linear covers the range of applications between the existing Sprint 42 linear and the Sprint 65 linear, rounding off this product series in the diameter range up to 50mm.
The standard version of the Sprint 50 linear features a C-axis on both spindles and includes three 12-station turrets with 36 driven tool stations.
Using a linear drive in the X3-axis gives exceptional acceleration (>1G), the fast rapid traverse speeds (40m/min) and finally the shortest available idle/job times.
A special feature of the Sprint 50 linear is performing precision machining tasks efficiently with three interpolating turrets, combined with a total of eight linear axes, two C-axes and two additional 'virtual' C-axes.
These features deliver maximum flexibility in the production process on the two lower turrets.
As far as drive technology is concerned, the Sprint 50 linear features two integrated spindle motors with a maximum power output of 15kW and 80Nm torque.
In addition, the Sprint 50 linear features a pick-up device for completed work pieces.
It uses two pneumatic axes and a conveyor belt.
Externally, the machines exhibit a new style.
It includes a high-quality off-white finish, with touches of shiny black, as well as the DMG LIGHTline, which spans the entire length of the machine in the area adjacent to the door, replacing a conventional indicator lamp to signal the operational status of the machine in different colours.
Overall, the driving force behind the development of the new design was added customer value.
Another striking element of the new generation of DMG machines with the 'New Design' is better visibility into the work area, leading to greater transparency of the machining process, due to a 40% enlargement of the safety-glass viewing windows.
* GMC 25 linear/ISM and the GMC 42 linear/ISM CNC multi-spindle automatic lathes - the GMC 25 linear/ISM and the GMC 42 linear/ISM are the latest development in almost 50 years of producing Gital multi-spindle lathes.
The machines are designed to maintain H5 standard of precision during machining.
They have six oil-cooled electro-spindles with a power output of 15kW (at 100% duty cycle).
A continually indexing spindle-drum shortens idle times and up to seven CNC axes/spindle position provide of up to 56 controlled axes.
In addition, the machines are equipped with a Siemens 840 D powerline CNC, including dual processors.
The advanced CNC system and the use of optional linear drives in positions 4 and 5 can result in rapid traverse speeds up to 50m/min and accelerations up to 2G.
The machines have the DMG Programmer 3D Turning, an excellent system, said Gital, for the simple programming of complex machining tasks, featuring 3D simulation and job time calculation.
Features of the GMC 42 linear are as follows.
* Bar diameters up to 42mm, up to 51Nm torque.
* Better dynamic characteristics due to faster X, Z and W-axis.
* Patented, multi-function device (optional) for tool turret, radial boring device or 90 deg boring device.
* Best precision with process-capable H5 tolerance, as well as Y-axis and tool turret.
* Two CPUs in the standard version: up to 56 controlled axes with the Siemens 840D powerline CNC.
* Six independent, oil-cooled and independently rotating synchronous spindle motors with a drive power of 15kW (100 % duty cycle).
* Up to 50m/min rapid traverse and 2G acceleration.
* Up to seven CNC-controlled axes for every spindle position.
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