Designed for fast, flexible, high-performance production machining, the heavy-duty HELLER MCH series horizontal machining centers with a working range of 800mm x 800mm x 800mm to 3400mm x 2400mm x 2200mm is ideal for small to medium production batch machining in the automotive and heavy-duty powertrain components, and alternative energy applications.
Other Heller machining center solutions demonstrated on the floor at Heller during its Technology Days included the multi-spindle MPC headchangers for mid-high volume production and the MC20 ModuleLine machining center for frequent changeover applications and 5-sided machining. An MCH 400D, the first of its type produced by Heller worldwide, was shown during construction. It includes a massive A-axis trunnion for multi-side machining of large CGI diesel engine components.
The MCH class of heavy-duty horizontal machining centers boasts high-torque for heavy metal removal, high-speed rapid traverse, and superfast acceleration supported by fast tool and pallet change and rigid one-piece bed construction for high precision machining. The flexible MCH machines are designed for palletized production, cell operation, or stand-alone applications, and long-term durability.
Fast spindle speeds are only the beginning of the series’ rapid part processing capabilities, and a combination of well-developed features make the MCH machines ideal for high-speed high-productivity machining.
Pallets are changed within seconds, permitting simultaneous part loading and machining and further reducing chip-to-chip times. Depending on customer requirements, the MCH machines are available with high-accuracy CNC rotary tables with fully capable feed axis, or Hirth-coupled tables. Work is easily accessible from three sides for manual or automated loading and unloading.
The rugged and reliable mechanical tool changer serves a 50-100 tool chain magazine or up to 405-tool universal rack magazine and is capable of 4.1 sec (VDI) chip-to-chip toolchange. The CNC chooses the shortest tool selection path.
As with all Heller machining centers, pre-loaded roller bearing guideways in all axes assure high positioning accuracy, zero backlash. The cast iron, gantry-design, thermosymmetrically constructed column, and one-piece bed are FEA optimized for stability and rigidity. The pallet changer is integrated into the bed as are X and Y feed drives.
Along with speed, the Heller machine tools also provide world-class accuracy: 0.2 microns resolution, 7 microns total true positioning accuracy anywhere in the work zone, according to the standard for machine tool positioning accuracy VDI DGQ 3441. Any position within the work envelope can be reached to within 7 microns total. Accuracy is even better when axis travels are well within the bandwidth, according to the company. Linear scales in all axes are standard.
The MCH machining centers are equipped with HSK 100 toolholders for maximum rigidity at all spindle speeds, minimizing chatter. Machining of CGI occurs in the 100rpm to 9,000rpm range.
Heller is long-experienced in engineering world-class production capability. More than 600 Heller manufacturing systems and more than 2000 machining centers are installed worldwide making all types of complex, high-accuracy parts, from engine blocks and crankshafts to medical devices.