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.
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 |