CyTec m21 2Axis NC universal milling head

CyTeс m21 2Axis NC universal milling head 

Machining Head  
Series M21 45 Universal  

The medium-size universal Milling Head Series M21 is designed for applications in general workpiece machining that use the advantage of flexible positioning under 45 degrees as an important criterion.  

Application areas: five-axis machining in the aircraft and automotive industries as well as standard applications in tool machining, milling, drilling, grinding, etc.  

Patented dynamic direct drives in all axes CyTec development  
Highly precise CyTec axial and radial bearings  
Prepared for different control systems Siemens, Heidenhain, Fagor, NUM  
Can be equipped with motor spindles from a wide product range, from the powerful rough machining spindle up to high-speed spindles  

Power range 21 up to 60 kW  

Options include:  
Automatic head docking with integrated indexing, media, and energy couplings  
Attachable fixed heads in vertical or 90-degree designs for powerful rough machining of big bulky parts as an alternative to the swiveling A-axis  

Technical data  

Head C-Axis A-Axis 45  
Maximum swivel torque Nm  
Clamping torque Nm 60 bar  
Swivel speed 360 degrees per second  
Swivel angle plus or minus 110 degrees optional continuously  
Nominal voltage or current 400 V 28 A  
Power dissipation 2 kW 10 liters per minute  
Measuring system absolute  
Positioning accuracy  
Total weight approximately steel 780 kg  

Components schematically  

C-Axis  
Supply connections include motor current, measuring systems, cooling, and hydraulics for both swivel axes including the motor spindle.  

Media transfer through a rotary union  

Position monitoring with an absolute angular measuring system  

Torque motors as drives, analogous to the A-axis described below  

Hydraulically operated clamping bush  

Brake  

Radial and axial bearings  

A-Axis  
High-power torque motors as direct drives with integrated cooling  

Rotor with crossed roller bearing  

Hydraulically operated clamping bush  

Swivel housing with motor spindle  

Automatic tool clamping system  

Tool cooling with CTS, EC, and MQL options  

Position monitoring with an absolute angular measuring system  

Basic technical data motor spindles  

Option: Turning/Milling Spindle

For special machining tasks, it may be necessary to combine pure milling operations with a turning function. To address this need, a newly developed spindle is available. This spindle features a spindle shaft that can be additionally clamped, allowing, for example, a turning tool with an HSK-A 100 interface to skim a cylindrical rotating workpiece. With this combined turning-milling function, machining can, in certain cases, be realized more cost- and time-effectively.

Design
For A-axis positioning, an absolute value measuring system is used. Its hollow shaft is directly connected to the centering of the C-/A-axis rotor.

The graduated disk is rigidly affixed to the hollow shaft, while the scanning unit rides on the shaft on ball bearings and is connected to the housing via a coupling on the stator side.

The safe docking and locking of the head/spindle

The safe docking and locking of the head/spindle is enabled by the hydromechanical CyTrac clamping systems with preload. These systems are integrated into the C-axis swivel housing and couple the corresponding bolts of the head A-axis during the feed process.

In the released position, the bolts are disengaged, while in the clamped position, the clamping jaws grip the bolts, lock them securely, and hold them under preload.

For the transmission of liquid and gaseous media, such as coolant, hydraulic, or pneumatic systems, quick coupling systems are used. These systems are leakage-free, very compact, and capable of handling high volumetric flow rates. Thanks to the integrated offset and angle compensation, production tolerances and inaccuracies during joining can be effectively countervailed.