Modern Machine Shop
Index’s R300 combines two complete five-axis machining systems, each with one quill-guided motorized milling spindle and one assigned work spindle, for complete machining of complex parts, short bars ranging to 102 mm in diameter and chucked parts ranging to 315 mm in diameter. The machine is geared toward applications in which larger chucked parts require significant milling and drilling work, a common scenario in machinery construction, tool and mold making and the aerospace industry, the company says.
Tool strips attached to both sides of each milling spindle provide access to six stationary tools per spindle, a configuration that essentially combines the functionality of a milling spindle and tool turret, the company says. This reduces processing time by making tool changes unnecessary during turning operations. The double-chain magazine accommodates as many as 140 tools for a total of 152 tools, a number that is sufficient to ensure short setup times even for small batches, the company says. The milling spindles can perform tool changes independently of each other, and chip-to-chip tool change times are in the 6 sec. range. The company adds that the use of HSK toolholders reduces tool costs because live toolholders are no longer necessary.
Short lever arms and travels, the lack of conventional cross-slides with tool carriers, and a play-free, wear-free hydrostatic circular guide make the machine rigid and resistant to vibration, the company says. Additionally, its B-axis swivel range of 270 degrees and rapid traverse rate of 45 m/min. provide flexibility and speed. The turning spindles offer 47 kW maximum power, a maximum speed of 3,500 rpm and a peak torque of 690 Nm.
The machine’s INDEX control C200-4D SL is based on the Siemens Sinumerik S840D. Specially developed cycles support multi-axis milling and turning operations. It also uses the INDEX VirtualLine software packages, which provide 3D simulation and enable machining programs to be created, verified and optimized on the PC.