OMICRONCNCUNiVERSAL Cylindrical GRiNDiNG Machines Precision Since 1936Made In Italy Robbi Group srl Via deN'Industna 7 37040 Veronella - VR Italia 39 0442 47700 39 0442 47966 [email protected] www.robbispa.com

The Power of The CNC and the Process Simplicity • The work cycle can be optimised in-process with geometrical and working parameters. • The CNC grinding machines versions were developed in response to needs for medium-high production volumes. • Equipped with the latest-generation of SIEMENS 840D sl control system. • Machines can be equipped with automatic measurement devices to process complex components. • The CNC allows the operator to profile the grind wheel specifically to create geometries for the type of job required. • High precision crowning operations can be performed by equipping the...

Complete Closure - A Type Standard Programs Shoulder Grinding Supplied with the Machine in 3 Modes FACiNg V V ANgULAR PLUNgE V V Taper V V Wheel Dressing Programming It is possible to program all the automatic grinding wheel dressing cycle parameters. The dressing operation may be executed: • outside the grinding cycle • automatically inside the grinding cycle (beginning before finishing or end of cycle), • automatically using a cycle counter, • on demand, during the grinding cycle In each cycle, it is possible to insert the shoulder grinding operation: Manually The machine...

Complete Closure - A Type

Handwheel division Internal center taper 4 MT Rotation speed (inverter) WoRKiNg Feeds(mm) Minimum programmable feed 0,001 Coolant pump 1150 mm from workhead spindle nose 2Without Inverter 3Option

Internal center taper 5 MT Rotation speed (inverter) WoRKiNg Feeds(mm) Minimum programmable feed 0,001 Coolant pump 1150 mm from workhead spindle nose Without Inverter

Complete Closure - A Type

Internal center taper 5 MT Rotation speed (inverter) 600-1250 rpm WoRKiNg Feeds(mm) Minimum programmable feed 0,001 Without Inverter

Internai center taper 6 MT Rotation speed (inverter) 600-1250 rpm WoRKiNg Feeds(mm) Minimum programmabie feed 0,001 Cooiant pump Without Inverter

Base Structure in normalised and stabilised cast iron with large ground guides. On all the lower part of the perimeter are situated the recesses for machine levelling. Table The table is manufactured in two parts, both are in normalised and stabilised cast iron. Lubrication is assured by a constant oil flow distributed over the complete length of the table. The upper part of the table is swivelable in the two directions making it suitable for grinding tapered workpieces. EQUiPMENT AND ELECTRiCAL PLANT The cabinet houses all the electrical / electronic components, PCL control, axis motor controllers...

Automatic table longitudinal movement re-circulating ball screw with preloaded nut V LLj Incremental linear encoder to display the position O <C Micrometric device with dial gauge for taper control V Machines with distance between centers of more than 4000 mm, the swivelling is facilitated and v more precise with teh an air cushion system External diamond dresser on the tailstock V Grinding wheel dressing with radius on the edges and interpolation between X and Z V i/i External wheel dresser support mounted on headstock O a: High frequency diamond roll (dressing wheels in CBN...

Standard EQUiPMENT Coolant equipment complete with pump, electrical equipment, tank, pipes and nozzle Coolant Filters Magnetic and paper roll wheel Balancing arbor hexagonal spanners . ... wheel spindle 5 kg guide 5 kg Instruction manual with preloaded nut Z table V .. . Wheelhead slides by means of a recirculating ball screw with double preloaded , Wheel head V nut, on linear motion guide with roller cage. Hydraulic unit for tailstock control V Pneumatic unit V Centralized lubrication V

Encloser Type A - Rounded • Complete Encloser • Elegant • Balanced Style Type B - Square • Complete Encloser • Functional • Essential Tipo C - Standard • Open Top • F

The structure is composed of two carriages in normalised cast iron. The upper carriage where the hydrodynamic spindle is located, has a manual stroke positioning to optimise the use of the grinding wheel An air flow facilitates the positioning The lower carriage slides by means of a recirculating ball screw with double preloaded nut, on linear motion guide with roller cage. The greasing of the guides is timed. The brushless motor which moves the screw, may be controlled (on request) with a closed loop by the incremental linear encoder, which guarantees a positioning precision on the complete...

Dead and Live Spindle v Positioning Facilitated by an Air Flow The structure in normalised, stabilised and well ribbed cast iron, supports the workpiece weight and the force generated by the grinding operation. Equipped with dead and live spindle. The spindle rotates: • on high precision ball bearings, guaranteeing restricted tolerance and maximum rigidity in the working; • by means of a AC motor and the rpm adjustments are programmable on the operator panel; • may be intermittently manual or automatic. The workhead positioning on the table is facilitated by an air flow. Workhead rotates 90 degrees...

Machine models PT6 and MT6, are supplied standard with Hydraulic opening / closure and micrometric correction of the cylindricity Machine models RT6 and ET6 are available in three different versions: • manual opening (standard); • hydraulic opening (on request); • hydraulic opening / closure and micrometric correction of the cylindricity (o

Internal Grinding The machine ( on request ) may be equipped with Internal Grinding Attachment, which may be mounted in two versions: • drop down over wheel head • on rear side of wheel head. Internal Grinding Spindle mounted on Rear Side of Wheel Head Robbi Group offers a large range of internal grinding spindles that can be : • belt driven spindles up to 42,000 RPM • electric spindles up to 120,000 RPM Large Range of Quills and Attachments are Available Internal Grinding Spindle Mounted Drop Down over Wheel Hea