Siemens, S.A. - Smart Infrastructure - CNC numeric controls
Siemens Sinumerik 840D
Technology CNC: for applications of the aeronautical sector component manufacturing sector component manufacturing sector
The needs of greater reliability in the processes of manufacture, greater productivity have important implications in the construction of the structural components of determinate applications.
In place to manufacture from small components, manufacture like an only piece. This saves 60% of time of setting and does to the component several more resistant times.
In the case of components manufactured entirely in aluminium, taxles of elimination of material in the order of 90% are common. This involves the need to use systems of mechanised of high speed.
Said systems require specific controls for his operation. Inside his range, Siemens manufactures the numerical controls CNC Sinumerik of the series 840D, that together with the converters Simodrive 611D and the linear motors of the series 1FN until S7, present a solution of control for the manufacturers of machines-tool for high speed.
From among the characteristics of such system, fits to stand out the optimisation of surfaces that includes by means of diverse tools. The processed soft achieves by means of the representation of surfaces by means of NURBS (Non Uniform Rational B Splines), that are interpoladas directly by the control Sinumerik 840D. The characteristic “Compcad” allows a greater optimisation of the functionality of the compressesor: the irregularities in the path produced by the systems CAM are softened.
To delete eddies uses the technician of the “look-ahead smooth”: the softened by previous analysis. They avoid the accelerations and braked short in the machines-tool that generate unwanted swings. The control of dynamic rigidity (DSC - Dynamic Stiffness Control) allows to the machine follow the path programmed with precision, thanks to a time of cycle of 0,06 ms. The amortiguación of active swings, that achieves by means of a digital filter in the system of control allow to delete possible resonant frequencies, that of another form would cause swings in the path of the tool.
Finally, some mechanisms more than control of path, as they are the control anticipativo (feed-forward), the limitation of sobreaceleraciones (jerk-limit), the maximum possible resolution of the systems of measure of position, the compensations by mechanical errors and the adaptative control, do of the controls Sinumerik 810D and 840D the optimum candidates to achieve a mechanised of high speed with an optimum surface.
In place to manufacture from small components, manufacture like an only piece. This saves 60% of time of setting and does to the component several more resistant times.
In the case of components manufactured entirely in aluminium, taxles of elimination of material in the order of 90% are common. This involves the need to use systems of mechanised of high speed.
Said systems require specific controls for his operation. Inside his range, Siemens manufactures the numerical controls CNC Sinumerik of the series 840D, that together with the converters Simodrive 611D and the linear motors of the series 1FN until S7, present a solution of control for the manufacturers of machines-tool for high speed.
From among the characteristics of such system, fits to stand out the optimisation of surfaces that includes by means of diverse tools. The processed soft achieves by means of the representation of surfaces by means of NURBS (Non Uniform Rational B Splines), that are interpoladas directly by the control Sinumerik 840D. The characteristic “Compcad” allows a greater optimisation of the functionality of the compressesor: the irregularities in the path produced by the systems CAM are softened.
To delete eddies uses the technician of the “look-ahead smooth”: the softened by previous analysis. They avoid the accelerations and braked short in the machines-tool that generate unwanted swings. The control of dynamic rigidity (DSC - Dynamic Stiffness Control) allows to the machine follow the path programmed with precision, thanks to a time of cycle of 0,06 ms. The amortiguación of active swings, that achieves by means of a digital filter in the system of control allow to delete possible resonant frequencies, that of another form would cause swings in the path of the tool.
Finally, some mechanisms more than control of path, as they are the control anticipativo (feed-forward), the limitation of sobreaceleraciones (jerk-limit), the maximum possible resolution of the systems of measure of position, the compensations by mechanical errors and the adaptative control, do of the controls Sinumerik 810D and 840D the optimum candidates to achieve a mechanised of high speed with an optimum surface.
