Product category:
Machining centres - all types
News Release from: DMG (UK) | Subject: DMF Linear Series H/V machining centres
Edited by the Manufacturingtalk Editorial
Team on 19 July 2002
Linear drive powers moving column M-C
Believed to be novel in the market of travelling column machining centres - is the use of a linear drive in the long X-traversing column to provide travel speeds up to 100m/min.
The characteristic feature of the DMF Linear Series from DMG UK - and unique in the market of travelling column machining centres - is the linear drive in the long X-traversing column Apart from 0.5G acceleration, the linear drive offers a large number of additional advantages
This article was originally published on Manufacturingtalk on 21 Jun 2001 at 8.00am (UK)
Related stories
Dies milled dry at high speeds
The new DMC 65 V vertical machining centre applies high-speed cutting, dry machining and universal application in die making and series production with high dynamics and precision.
CNC miller-drillers cut 20% off machining times
With the highly productive DMU 50 / 70 eVolution, DMG has added a new dimension to universal milling and drilling machines designed to save up to 20% on machining times.
First and foremost is the column's traverse rapid speed of 100m/min.
This is substantially quicker than machines with ball swing spindle are able to provide.
Traverse speed on this type of machine is limited by the critical flexing speeds of the drive shaft.
Further reading
Gildemeister lathe programme covers all
The lathe programme run by the GILDEMEISTER group has now become so extensive that there really is no machining job any more that these machines cannot do.
Conventional lathe has digital drives
The world innovation - the NEF 320 K - a conventional lathe with navigator system rounds off successful NEF product line.
Bar feeder has high capacity
SACO's new bar feeder reduces idle times and offers high precision and flexibility. Idle time for bar feeding to the collet is considerably reduced.
In addition to speed, the linear drive ensures exceptionally accurate positioning and longevity.
In conjunction with fast tool changeover of just 5 seconds and the high metal removal rates, these features combine to provide excellent price to performance ratio.
The FEM optimised moving column is built in a diagonally-ribbed construction.
The high dynamic rigidity this affords provides perfect machining conditions for both roughing and smoothing.
The massive Z and Y carriage system and the fast motor spindle with a maximum speed of 12,000 rev/min also contribute to this machine's ability to handle a wide range of cutting requirements.
High speed machining and the use of modern cutting materials are only two of the many possibilities.
Whilst a vertical spindle is central to the standard configuration of this machine, a newly developed H/V head can also be specified.
This head is ideal for more demanding applications such as the machining of slanted bores and angles as well of both faces of the workpiece.
In conjunction with an optional NC-turntable, complex 5-sided machining is possible.
The H/V head can be hydraulically rotated through 90 degrees into a horizontal position to both the right and left sides in increments of 2.5 degrees.
A special feature of this universal head is that it is clamped into positions and therefore offers extreme rigidity in all spindle positions.
Changing from the horizontal to the vertical spindle position takes just 4 seconds.
Designed as a gear head, the new H/V systems offers a high torque of 292ft/lbs., at speeds of up to 6,300 rev/min, making it ideally suited to heavy cutting work.
The DMF tool magazine with a capacity of 30 tools is connected to the moving column through a pneumatic cylinder.
Consequently the tooling involved in the machining process is always available in pick-up mode ensuring short changeover times of as little as 5 seconds.
The magazine can be 'uncoupled' from the machining process while the next tool is made available so that the cutting process is immune from potential vibrations.
If more tools are required, the machine can be equipped with a shelf-wall magazine for 100 tools which is affixed to the side of the machine.
This system employs a high speed tool-shuttle equipped with linear drive that works in tandem with the existing magnetic transfer duct to keep costs down.
The DMF linear series is equipped with the new Siemens 840D powerline CNC control which not only perfectly complements the digital drives in the Y- and Z-axes but also the linear drive in the X-axis.
This control is characterised by faster Intel Pentium processors that allow shorter machining cycles.
The DMF 220 and 300 are soon to be joined by new additions to the series including a model with a travel path of 1600mm; even longer paths are envisaged.
In principle, nothing apart from overall dimensions has to be changed and the requisite number of magnet segments added in the X axis.
The central machining unit, formed by the travelling column and the motor spindle will remain identical for all machines as will the tool magazine.
With the addition of an optional dividing wall, the DMF machines can also be easily converted for pendulum machining.
• DMG (UK): contact details and other news
• Email this article to a colleague
• Register for the free Manufacturingtalk email newsletter
• Manufacturingtalk Home Page
Search the Pro-Talk network of sites
