Siemens CNC in metalcutting applications
Biglia has equipped its Quattro turning center series with the Sinumerik 840D sl CNC control. The individual machines have 11 to 15 CNC axes.
The turning centers from Biglia have two spindles and two independent tool turrets for simultaneous machining.
The Sinumerik 840D sl control is based on the Sinamics S120 drives platform.
Northern Italian machine tool manufacturer Biglia recently introduced its multi-functional turning center, the Quattro series, with the Sinumerik 840D sl CNC. The machines are available in different versions from 11 to 15 CNC axes. They are intended for different turning diameters (45, 52, 65, 71 and 80 mm).
The two opposing spindles form a main feature of Biglia's Quattro series. This allows the workpiece to be machined from two sides. The second spindle can also be moved linearly in two directions (lengthwise and crosswise). This provides some leeway in the case of additional milling operations, but it can also be used for automatic workpiece unloading. Two turrets, mounted on the Y-axis, allow proper positioning of the necessary tools.
"This innovative machining technology allows the creation of not only rotary but also prismatic workpieces - including polygons," said a company spokesperson. "Dealing with everything in one setup not only reduces cycle times, but it also enhances accuracy. The machines are developed on the basis of a modular concept that ensures flexible application options - from the universal CNC lathe to complete machining of complex workpieces with powered tools (C- and Y-axis)."
Getting it Right, from the Start
Biglia has expanded its previous options by combining its technologies with that of the Siemens Sinumerik 840D sl CNC control. "In this project, which is of strategic significance for Biglia, we wanted to do everything perfect right from the start and to get the most out of it," said Giovanni Delmondo, Business Development Manager for machine tools with Siemens Italy. "The result is an all-round successful machine series with a modern control that already includes the innovative system expansions of recent months - including increased energy efficiency options offered by the control and drive systems from Siemens.
"As an example, the fans on the spindles shut down automatically when they are not required, or certain services such as hydraulics, lubricant supply, or compressed air are deactivated during machine standstill times. This is handled via special screen forms on the control and is simple using the Run MyScreens function."
Also included is standard energy efficiency technology from Siemens in the Sinamics S120 drives on this machine series. This includes automatic power factor correction or regenerative feedback of the energy generated in braking operations, a factor in energy savings.
Performance and Scalability
The centerpiece of the automation concept of these Biglia turning centers is the Sinumerik 840D sl control. This is a universal and flexible CNC system implemented in the Sinamics S 120 design. It is suitable for up to 31 CNC axes. The Sinumerik 840D sl may be used in diverse machining technologies, including turning, drilling, milling, grinding, laser machining, nibbling or punching. The CNC control also has PLC (programmable logic controller) functionalities, so that a special PLC can be eliminated, if applicable.
This Siemens control is suited to medium and complex tasks and production and can be adapted to the task due to scalable hardware. According to the company, the CNC is also characterized by openness, so the operator interface and also the software present few limits to specific job adaptability. This applies all the way to supplementing the CNC core of the control; however, a special license is required for this adaptation.
On the Biglia turning centers the control was equipped with the Sinumerik Operate user interface. Three different methods of parts programming are possible: classic ISO code programming; programming with the help of the integrated ProgramGuide with graphical support of the selected cycles; and the new two-channel ShopTurn with graphical 3D simulation. The user is led step-by-step through the cycles, whether for simple metal removal, drilling, thread cutting, pocket milling, groove milling or engraving. Complex programming cycles for complex contours are also possible. The ProgramSync function for automatic synchronization of the machining programs via two channels is designed to provide increased machine productivity. The control is equipped with a 15" monitor and integral keyboard.
The Quattro series from Biglia also uses the personnel and machine protection system provided by the Sinumerik control concept with the Sinumerik Safety Integrated package.
The new servo motor generation 1PH8 from Siemens is used for the main spindle motors in this series. The linear axes are further equipped with the new 1FK 7 G2 series of permanent magnet synchronous motors. These motor types from Siemens enable onsite replacement of the encoders without having to dismantle the complete motor.
For more information contact:
John Meyer
Siemens Industry, Inc.
Drive Technologies - Motion Control
390 Kent Avenue
Elk Grove Village, IL 60007
847-640-1595
siemensmtbumarcom.industry@siemens.com
www.usa.siemens.com/cnc