Mass-Centering Machines for Crankshafts
400 SBRZ | 600 SBRZ | 400 TBTZ | 400 MBRZ

Design
Single or multi-station machines with automatic sequence. Loading and unloading manually with a suitable lifting device, automatically by loading gantry or by integrated lift and carry transport.

Flexible machine design, especially suitable for varying crankshaft programs. Manual or automatic length adjustment for change-over to various crankshaft lengths. Balancing frame supported on the machine base by round springs. Two carriage units mounted on the balancing frame with integrated externally-rotating end discs mounted on precision bearings, each with two adjusting gears. Hydraulic spindle drill units or electro-mechanical carriage drill for center drilling, either integrated into the measuring station or arranged in a separate centering station.

Range of application
Mass-centering of face milled raw crankshaft castings or forgings in a variable program.

Processing of symmetrical and asymmetrical crankshaft types by change over.

Conceived for use by engine manufacturers in mid-volume and high-volume production.

Manual loading and unloading of the machine by lifting device or automatically by interfacing with customer’s conveying equipment.

Integration of preceding or subsequent process steps in the complete line.

Measuring station for determining mass eccentricity by dynamic unbalance measurement.The crankshaft is loaded and unloaded from above, clamped at the main journals and driven between synchronous-rotating end discs by an amply dimensioned drive unit. Clamping and setting elements are easily exchanged for various crankshaft lengths. Adjuster gear with drive through separate stepper motors. Processing of asymmetric crankshafts by offset of the measuring unit. Single-station machines are equipped with integrated center-drilling units.

Drill units with hydraulic or electro-mechanical feed for drilling the center holes. Adjustable to various crankshaft lengths. Precision drill spindles for high centering accuracy. In the case of a separate centering station the crankshaft is clamped at the main journals and restrained by means of alignment elements. Adjustment to the optimum centering position is achieved by positioning motors, numerically controlled from the measuring equipment.

Interfacing of the mass-centering machine SBRZ with a production line via a gantry loader. Simultaneous take-up and depositing of crankshafts. Short cycle times through minimum movement of masses. The possibility of combining the machine with a variety of loading and unloading conveyors ensures high flexibility.

The multi-station TBTZ machine has an integrated lift and carry transporter. The modular design allows processing of crankshafts both before and after journal preparation. This way cutting to length, milling of stroke surfaces and mass-optimized end processing can be combined in a cost-effective manner.