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Rigidez y capacidad de desbaste en una máquina de fresado a alta velocidadMachinery of European Production MPE, Stand 1B/2-2, Pavilion 4
Stiffness and ability to roughing in a machine of high speed milling
The German Röders presents in the Biemh its new RP800 model of milling of high speed to the sector of moulds and dies. It is a machine capable of slabbing at high speed: the manufacturer claims that the aluminum can be machined to 45 m/min and 36,000 rpm, so in consequence, large moulds are desbastados in a few minutes.
This capacity, that approaches the machine in concept to the machining centres standard, has achieved prevailing the rigidity and the stability. For this have used guides and husillos of balls sobradamente dimensionados. To this adds a design of the compact portico: the electrical cupboard is integrated in the machine and only the numerical control has situated went by reasons of visibility and handle. At the same time, they are very good the visibility and accessibility to the area of work, until the point that the cambiador of tools is accessible even during the execution of programs of milling. The stability increases also the life of the tools; the changes of tool diminish, because of a soft process of milling with few vibrations.
The maximum advance of the machine is 60 m/min. and the acceleration reaches the 1.3 g in all jes them. The standard of the machine reaches up to 36,000 rpm although demand can provide up to 40,000 rpm.
The evacuation of chips has two screw extractors, so even the long shavings are removed without any problems. The standard model is equipped with lubricating sacs and can alternatively be installed an emulsion cooling, very useful for removal of chips when you trbaja in deep grooves.
The model works with control RMS6, working with a Windows NT-based operating system. It has a processor Pentium III 550 Mhz with a power of up to 10,000 blocks per second; read up to 10,000 blocks of advancement in the development of dynamic control program.
New compensation of spindle
For high precision requirements, Röders has recently developed a new compensation of spindle, which is applicable to this machine model. An extra arm with one end fixed directly to the Z axis. At the other end is a small very precise sensor, which directly and without contact, is responsible for measuring the displacement of the rotating axis of the spindle. The data will go to the control and are used for compensation. The extra arm keeps an exact temperature by means of circulating water with a small tolerance.
Compared with other methods of compensation, it is faster and more reliable. This is due to that conventional systems that measure the temperature only have access to the accommodation of the spindle and not to the rotating shaft, that wheel at high speeds. With which only recorded temperature changes when they have already caused a shift of the spindle, which is why the compensation cannot be very effective.
On the other hand, the sensors that measure the displacement also problems which many found in the accommodation of the spindle and it expands with heat, according to Röders technicians. It is for this reason that the German company has chosen finally by an arm extra.
Stability and precision in Röders machine
More information:
Machinery of European Production
Tel.: 93 464 01 78. Fax: 93 389 46 48
www.mpe.es
4) METALUNIVERS January - February 2002
Related Companies or Entities
Maquinaria de Producción Europea, S.L.
