NBH 350

Hüller Hille machining centers NBH 350 for large and heavy workpieces

Parallel changer for heavy workpieces

High availability due to the proven machine design, supported by internal and external diagnostic functions

• Plaintext error display with diagnostic help
• Plaintext display of service intervals
• Telediagnostic service via WINDOWS application

Telescopic protective covers on guideways of all axes

Practice-oriented tool data

• Tool length 650 mm
• Tool weight 40 kg
• Bridge-type tools ø 500 mm

Proven MAG Hüller Hille magazine-cassette-system for

• In-process re-setting of complete tool sets
• In-process exchange of worn-out tools

Coolant system with paper band filter

• environment-friendly
• large coolant tank
• spool-type suction filter or vacuum rotation filter (optional)

Control SINUMERIK 840 D with "Safety Integrated Software" for safe and practice-oriented set-up works with chip guard doors optional.

The machine design of the NBH 350

Basis for a powerful production and demanding workpieces.

Machine bed

• Inherently rigid structure, optimized after the finite element method, as a thick-walled and extensively ribbed casting
• Optimum chip removal through large chip and return channels for the chip flushing water

Machine column

• Thick-walled and extensively ribbed casting
• Closed, torsion and vibration-proof gantry-type column, thermosymmetric structure
• Integrated tool changer

Table component

• Compact cast-iron table housing
• NC rotary table with 0.001° division controlled by the 4th CNC axis
• Compressed-air prevents the penetration of coolant and dirt

Digital axis drives

• Direct drive with maintenance-free A.C. servomotors and high-precisio recirculating ball screws with preloaded double nut
• Space-coded position measuring system, direct position measuring in all axes

Backlash-free form rail guidances

• All linear axes are equipped with form rail guidances
• High positioning accuracy
• High circularity accuracy
• High carrying capacity for a long working life due to the largely dimensioned roller bearing units

Modular spindle variants

• 25 - 6,000 rpm standard headstock (two-step gear) with steel ball bearing
• 25 - 10,000 rpm (two-step gear) with hybrid bearing [option]
• 25 - 12,000 rpm (motor spindle) with hybrid bearing [option]

Headstock

• Compact cast-iron housing with thermo-symmetric structure
• Working spindle as a complete unit; for service work, the unit may be replaced within a very short time
• High concentric running accuracy due to three-bearing support, extremely rigid spindle
• Long working life through labyrinth seal which in conjunction with compressed-air prevents the penetration of coolant and/or dirt
• Automatic two-step switching gear without clutch
• Spindle positioning via shaft encoder
• Connection for internal coolant supply
• Safe tool location since the tool taper is cleaned by air jet during the changing procedure

Parallel changer

• Due to the higher workpiece weights both, the nbh 350 is equipped with the proven parallel changer
• Double pallet changer with linear pallet in-feed thus offering independent loading, unloading and resetting facilities
• The largely dimensioned loading and unloading space is protected by automatic doors against coolant and chips ejected from the working area
• The resetting station is protected by a light barrier

Tool magazine

• In-process re-setting of complete tool sets
• Tool loading station for inward and outward in-process transfer of single (worn-out) tools
• No affecting of tools by coolant and chips due to the overhead arrangement
• Location-coded tools with electronic management

Tool handling equipment

• Short access times through high traversing speed (160 m/min)
• Brushless, digitally controlled A.C. servo drives with absolute position measuring system
• Taper cleaning device in gripper of handling equipment

Tool changer

• Quick tool changing due to the electro-mechanical forward and backward motion of the double-tong unit
• Programmable accelerating and changing speeds for variable tool weights
• Safe tool changing due to hydraulic tool clamping
• Direct transfer of the tool from the tool handling equipment
• Brushless, digitally controlled A.C. servo drives