Efficient Titanium Machining

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Expertise in machine tool building Based on the milling of a typical component roughing time is usually calculated at > 70% (even for forged parts). It has quickly become apparent that an increase in productivity is directly related with the dissipation and removal of swarf away from the component. The ideal machine must be so designed and built that it can attain high volumes of swarf removal in actual/real cutting conditions. Spindle torque diagrams and cutting force 'data' only tell half the story. The most important element is to use a machine that enables deep and stable chatter-free cuts. A well designed and balanced concept (weakness-free) as well as high stiffness, low resonance and high dampening qualities are imperative. A prime example of high stiffness and high dampening is the use of a gear spindle instead of a motor spindle. Apart of the extreme robustness, a gear spindle has the advantage of high dampening properties when dealing with rotor bending moment forces. The spindle rotor stiffness is much higher due to the rugged spindle shaft and short distance from the spindle nose to the rear spindle bearings. Starrag Nodding head with two supports and a heavy duty gear spindle Spindle options : 8000 rpm/ 940 Nm 5600 rpm/ 1300 Nm Dörries Heckert Scharmann SIP Droop + Rein TTL Berthiez WMW Ecospeed 5
Expertise in machine tool building Gear spindle shows best behavior in class: highest rigidity and process stability due to – rugged spindle bearings – rugged spindle shaft – short axial distance of bearings Spindle rotor much more rigid than competition compact design allows shortest distance between spindle nose and A-axis – 220mm in comparison to > 400mm – shorter lever arm leads to better flow of forces and to ultimately higher rigidity – smaller evasive motions are required compact and rigid design leads to – highest crash resilience – easy maintenance and repair Starrag 220 mm Dörries Heckert Scharmann SIP Droop + Rein TTL Berthiez WMW Ecospeed 6
Page 1 and 2: Efficient Titanium Machining Update
Page 3 and 4: Challenges in Titanium machining We
Page 5: Expertise in machine tool building
Page 9 and 10: Expertise in machine tool building
Page 11 and 12: Other interesting Options Starrag D
Page 13 and 14: Pallets Pallets are available with
Page 15 and 16: Mill-Turn-Machining, STC800/160 Rot
Page 17 and 18: Automatic Machine Adjustment Alignm
Page 19 and 20: Comparision : Milling head STC agai
Page 21 and 22: Process stability Milling head STC-
Page 23 and 24: References HEC/ STC-Serie Starrag D

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