Portaherramientas flotantes
Para operaciones de escariado en el torno
En el mecanizado de precisión de agujeros, la coincidencia del agujero piloto con el eje de la herramienta es el requisito para el funcionamiento correcto del escariador. Al utilizar escariadores en tornos frecuentemente es necesario compensar el error axial entre el amarre de la herramienta y el agujero que debe mecanizarse. Este error puede corregirse o bien alineando la herramienta en la máquina o bien por medio de un portaherramientas flotante. Un portaherramientas flotante está especialmente indicado cuando el desplazamiento cambia constantemente debido a la expansión térmica de la máquina o debido a diferentes posiciones durante la rotación del revólver. Los portaherramientas flotantes MAPAL garantizan unos resultados óptimos durante el mecanizado con unas elevadas velocidades y avances.
Floating holders
Floating holders from MAPAL compensate for the axial and angular offset between the tool axis and the bore to be machined. In this way radial run-out and alignment errors are compensated, optimal surface finishes reliably achieved at high cutting speeds and increased tool life.
Self-adjusting floating holders
Self-adjusting floating holders optimise the effectiveness on lathes and multiple spindle machines. All the advantages of the floating holder technology can be exploited.The self-adjusting floating holders make it possible to manually adjust tool adapters that are not central in relation to the rotating spindle and slide guides that do not run parallel to the spindle axis.
The radial play on the floating holder is further minimised. Radial run-out and alignment errors are compensated without vibration, long cutting times and tool lives are ensured. The integrated coolant supply guarantees an optimal supply of cooling lubricant to the reamer cutting edges. The spindle error can be adjusted directly via an easily accessible eccentric screw.
Floating holders for multi-bladed reamers
Floating holders have a significant weakness when used in conjunction with multi-bladed, high-performance reamers. Due to the function and the construction of the floating holder, when the tool initiates the cut at the beginning of the bore, a very low cutting speed must be selected initially. After the machining of the first few millimetres it is then possible to increase the cutting speed, depending on the material and conditions on the machine.
The mechanism inside the floating holders for multi-bladed reamers is designed especially for machining using multi-bladed reamers so that the compensation direction, the floating path and the necessary force for deflection are optimal for a specific range of diameters and tools used in the holder. This exact matching is particularly important on starting the cut. As a result high cutting speeds are possible even at the start of the reaming operation.