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DDP-600 Wheel Demount Press

Wheel Press for Disassembling Railroad Wheel Sets

The Simmons Dual End Demount Press (DDP-600) disassembles wheels from wheel sets. The machine consists of a hydraulic cylinder beam assembly at each end of the press, which can be anchored to concrete pedestals or fabricated risers on the shop floor. The press cylinders are equipped with centers and are extended such that the wheel set is supported by its centers throughout the demounting process. Both rams have embedded distance transducers to provide ram and axle position information to the operator at all times. One ram extends until the first wheel contacts the center abutment. As the ram continues to extend, the wheel is pressed off the wheel seat. The demount process is then repeated by extending the opposite cylinder until the second wheel is pressed off.

Hydraulic Wheel Press Demounting Wheel From Axle

The press is capable of demounting a wheel set in 90 seconds. The load/unload time varies depending on the optional handling equipment selected. A typical transfer crane system will add approximately 210 seconds to the cycle time for the combined loading and unloading processes. The press can be recessed into the floor to optimize the working height of the press or facilitate material movement. It can also be used entirely above floor to minimize the installation costs.

Machine Specifications

Machine Dimensions

 Press Length 411 in. 10.44 m
 Press Width 275 in. 6.99 m
 Press Height (without pit) 90 in. 2290 mm
 Total Weight (Including HPU) 40000 lbs. 18200 kg
 Distance Between Tie Bars 54 in. 1371 mm
 Ram Stroke 31.5 in. 800 mm

General Specifications

 Cycle Time (Demounting Only) 90 seconds
 Maximum Pressing Force 600 short tons 5330 kN
 Ram Extend Speed 120 in/min 50 mm/s
 Ram Retract Speed 140 in/min 60 mm/s
 Maximum Pressing Speed 11 in/min 4.5 mm/s

Utility Requirements

 Electrical Power 45 kW

Wheel Set Dimensions

 Maximum Wheel Diameter 48 in. 1219 mm
 Minimum Wheel Diameter 28 in. 711 mm
 Maximum Axle Length 102 in. 2590 mm
 Maximum Axle Diameter 10.5 in. 265 mm

 

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