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Machining Centers & Cells


age include a Fanuc 31iA control, AICC II package, featuring machining condition selection function, AI contour control II, smooth backlash compensation, thermal displacement feature and automatic power-off feature.


JapanTek’s 5X-410 machining center from SB Machine Tools (Schaumburg, IL) provides a unique five-face/five- axis machining capability that can be configured in four different ways for precision machining applications in the aerospace, medical, automotive, and die and mold industries, among others.


725 mm) for the F750M model and 96.5 × 37.4 × 33.5" (2450 × 950 × 850 mm) for the F960M model. Standard features found on both M-Series machining centers include; 12,000-rpm built-in spindle with Big Plus 50-taper spindle nose, thru spindle coolant with chiller, hardened and ground box guideways and HW MP II CNC mold package included in the control. Ultrapre- cision class angular bearings of the 2000-rpm built-in cartridge type spindles minimize noise and vibration at high cutting speeds and thermal transmission to the main spindle. Big Plus spindle system (BBT #50) provides dual contact


between the spindle face and the flange face of the tool- holder. This greatly increases tool rigidity, reduces run out and adds significant productivity to any machining applica- tion. Spindle motor is 16–25 hp (11.9–18.6 kW) with spindle torque rated at 893/732 N•m. The Big Plus spindle offers machine users fast material removal rates, as well as high accuracy and rigidity. It guarantees stability when run at high spindle speeds for high-rpm precision machining. CNC control is the Fanuc 31i. All guideways are hardened and ground, wide box type


for long-term rigidity and machining accuracy. By adapt- ing the “semi-rising sliding ways” system the load on the X and Y-axis slide way is decreased dramatically enabling the M-Series VMC’s to hold tolerance and repeatability over longer cycle times. The F960M table is further supported at all times by the use of four boxways and two supplemental ways. This allows for a maximum table load of 4500 kg with- out any table distortion. To aid in the machining of molds, the Hyundai WIA Mold Package is applied as a standard feature for the F750/960M Series machines. This ensures accurate and high-quality sur- face finishes and contouring. Main points of the Mold Pack-


66 ManufacturingEngineeringMedia.com | April 2013


Evolving Designs for Universal Machining Centers Grob Systems Inc. (Bluffton, OH) has evolved its universal machining centers in milestones that began with the first ap- pearance of the G350 in 2007, followed by the launch of the much larger G550 in 2009 and then in 2011 EMO and 2012 AMB showcasing the G550T five-axis universal mill-turn ma- chining center. To meet the demand and sustain the evolution of the G series machines, Grob has expanded its manufactur- ing locations in the US, Germany and China by more than 600,000 ft2


(55,472 m2 ).


Grob engineers are adding options to the standard components to meet demand from medical technology, tool and mold making, aerospace and automotive industry applications, among others. The growing Grob customer base includes a printing machinery manufacturer, the Swiss company Liechti, which specializes in the supplying turnkey solutions for the production of turbine blades and impellers. An order from a leading aerospace parts manufacturer totaled 28 G350/G550 machines equipped with pallet changers and Siemens 840D sl CNC controls.


A hunting rifle manufacturer was recently looking for an automated machining cell to produce high tensile strength aluminum parts for its rifles. The process originally utilized four-axis machines, but the company wanted to progress to five-axis machines to reduce the number of machining setups. The machines also needed to be capable of deep- hole drilling, have excellent chip evacuation and be capable of holding tolerances to ±0.005 mm. The tombstone setup provided by Grob allows parts to be completed in only two set- ups while the original process took five different setups. Four GROB G350 machining centers with 205 tools each were purchased for the application along with a pallet pool system to have lights-out production. The Diamond Cut milling series of vertical machining centers


from MC Machinery Systems Inc. (Wood Dale, IL) comprises five series of VMCs and drilling and tapping machines. The MC Mill- ing line covers a broad cross section of machining operations in- cluding general engineering, mold and die, drill/tap, and heavy- duty machining. The MCV Series general-purpose machining centers feature two spindle/tooling systems, CAT-40 8000-rpm


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