Product category:
Pick-up spindle turning, multi-tasking, turning and machining centres
News Release from: DMG (UK) | Subject: Gildemeister CTV 160 vertical turning centre
Edited by the Manufacturingtalk Editorial
Team on 19 March 2008
Hanging spindle lathe offers more
flexibility
A hanging spindle, 220mm diameter, serial production CNC turning centre offers shortest chip-to-chip times and optimum turning performance from a compact footprint.
The Gildemeister CTV 160 hanging spindle turning centre is claimed to offer optimum efficiency for mass production from the smallest of footprints Shown at a recent UK Open House by DMG (UK), the CTV 160 is said to have the shortest chip-to-chip times and offers optimum turning performance
This article was originally published on Manufacturingtalk on 21 Jun 2001 at 8.00am (UK)
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DMG said the centre not only offers the fastest production times when used for serial production, it also offers flexibility on the shop floor thanks to its excellent accessibility and user-orientated control technology.
* Effective batch and high volume production - producing an effictive hanging vertical spindle turning centre for serial (medium batch) and mass production lies primarily in the option of moving the Y-axis out of the working area and placing in it the area of the travelling column, said DMG.
The disappearance of the Y-axis from the work area means that all motion axes are now located on the side of the workpiece spindle and opens up freedoms for processing.
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This upward displacement has now made it possible to expand the travel path of the Y-axis to +/-90 mm, a length unequalled on the market, claimed DMG.
It increases the flexibility of applications of the machine enormously in the area of off-centre drilling and milling, said the company to manufacturingtalk.com.
In combination with the exceedingly long Z-axis, it is now possible to process a wide range of shorter and longer workpieces of between 20 and 180mm and with diameters of 160mm not only with high precision but also with no need for time-consuming retooling.
Regarding the repositioning of the Y-axis, the managing director at Gildemeister Drehmaschinen in Bielefeld, Germany, Dr-Ing Juergen Walz, said: "The main aim here lay more in reducing idle times.
In this respect the higher position of the large Y-axis means that the machine is now able to place a machined workpiece onto the transport belt using a pick-up-principle and to move program-controlled to the next unmachined part, mount it in the spindle and move back to the machining position without any loss of time whatsoever." He added: "In combination with the fast X-axis we now achieve on balance chip-to-chip times of less than 5s, which 'catapults' the CTV 160 to the top of the competition scale right from the word go".
The CTV 160 is very compact, occupying only 4.7m2 space.
Feeding of the workpieces is carried out in the standard variant via a round table with 20 stations for workpieces of lengths ranging from 20 to 200mm, diameters of up to 160mm and weighing up to 8kg.
An interesting feature is the simple height adjustment to adapt the table for different workpieces.
And as far as the reliability of the CTV 160 in continuous operation is concerned, Dr Walz gave an example of the use of large 45 guideways as the basis for maximum process stability.
Also, there are no longer any axes to be found in the lower work area where chips fall.
DMG said this raised process reliability and simplifies maintenance work.
The spindle-bearing-rotor package, for example, is accessible as a complete unit and can be replaced with ease.
As regards easy accessibility to the work area, Dr Walz said: "We all know that dropping a clamping claw into the chip conveyor while replacing a claw is something that happens time and again.
If this does happens, the CTV 160 is the only machine where the operator can retrieve the clamp again easily; with all other makes you have to wait until the chip conveyor 'spits' the claw out".
* Chip conveyor - the chip conveyor can be readily placed either to the side or in the rear area of the machine.
This option offers an additional degree of freedom for locating the machine in the plant.
Also two identical CTV 160 machines can be placed directly side-by-side and be fed by one workpiece magazine with a turning station.
In this way, a manufacturing system can be set up for complete machining.
There is also the additional option of installing an extra 'buffer' conveyor belt for parts on the rear side of the machine.
* CNC - the Siemens Sinumerik 840D solutionline is a 'serial-specific' CNC .
The option of using a direct drive with linear standards in the area of the long X-axis accommodates an even higher degree of dynamics and top demands on precision, said DMG.
The CTV 160 has an extremely generous work area access measuring 750mm, providing good accessibility for quick and easy set-up.
The adapted DMG ERGOline Control with its large 19in screen and integrated ShopTurn programming system guarantees the quickest way from the unmachined workpiece to the finished product, said DMG.
Not only does the larger screen guarantee easier reading, its also allows the integration of additional DMG SOFTkeys as well as more extensive status information.
This facility ensures a more relaxed and surer way of working, said DMG, and more efficiency.
The DMG ERGOline control is equipped with a swivel mechanism with which the screen as well as the operator panel can be adjusted to the ergonomically ideal position for the operator.
The seating for the machine operator can be adjusted selectively and there is an optional mouse pad with its document holder.
The DMG SOFTkeys can be allocated freely by the operator for such functions as frequently used operating sequences or screen contents that must be accessed often.
The DMG SMARTkey system is said by DMG to be unique in machine tool construction.
The DMG SMARTkey system allows personalised authorisation of the operator including relevant access rights or individualised preparation of the control.
The CTV 160 has an exceedingly wide-ranging spectrum of applications, said DMG, and is ideal for the smallest jobshop right through to automotive applications.
The CTV 160 is the beginning of a whole series of vertical lathes.
Technical data on the CTV 160 is as follows.
* Chuck diameter - 160 (200)mm.
* Swing diameter - 220mm.
* X-axis - 575mm.
* Y-axis - +/-90mm.
* Z-axis - 300mm.
* Rotational speed - 6,000 rev/min.
* Power (100%/40% DC) - 16/21kW.
* Torque (100%/40% DC) - 135/176Nm.
* Powered tool stations (power-driven) - 12.
* Rotational speed, power-drive tools (VDI 30/VDI 40) - 4.000 rev/min.
* Power, power-driven tools (VDI 30/VDI 40) - 6/11.7kW.
* Torque, power-driven tools (VDI 30/VDI 40) - 19/28Nm.
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