The Simmons Pre-Mount and Mount Press (SMP-200) is a fully automatic production wheel press for mounting railcar wheels to axles. The SMP-200 takes pre-machined wheels and axles and accurately positions and mounts the wheel set in a fast, efficient, and AAR-compliant manner.
The machine cell combines wheel bore and axle lubrication stations, pre-mount press, and mount press. Wheels are loaded into wheel carts that transport them to the wheel bore lubrication station. Once lubricated, the cart loads the wheels into the pre-mount press. Axles are loaded directly into the axle lubrication station, or held in an optional axle rack. After lubrication, the axle is transferred to the wheel set cart that holds the axle during the pre-mounting and mounting operations. The pre-mount system pre-assembles the wheel set, pressing the wheels onto the axle with 19 tons of force. Pre-mounting is fully automatic and eliminates pre-assembly of the components in the mounting press, saving production time. After the wheels are pre-mounted to the axle, the wheel set cart transfers the wheel set to the intermediate elevator, which transfers the pre-mounted wheel set from the first position on the wheel set cart to the second position. The pre- mounted wheel set is then transferred into the mounting press.
The 200-ton mounting press performs the final assembly of the railway wheel set. Matched wheel and axle assemblies are indexed into the mounting press from the pre- mount station. The press includes special tooling and an automatic gauging system. The gauge system automatically positions the wheels on the axle centerline and at proper track gauge, produces wheel sets that are consistent and free of operator error. The automatic press includes a Wheel Press Recorder, which produces a pressure diagram, reflecting tonnage over distance. The tonnage recorder also stores the pertinent wheel and axle data such as wheel and axle serial numbers, mount number, and misfits, allowing the stored data to be and transferred to a central computer.
| Overall Machine Length
(not including wheel carts)
|175.5 in.||4455 mm|
|Overall Width||267.5 in.||6797 mm|
|Maximum Height||113 in.||2871 mm|
|Total Machine Weight||47700 lbs.||21637 kg|
|Takt Time||2 minutes 10 seconds|
|Wheel Centering Accuracy||+/- 0.020 in.||+/- 0.51 mm|
|Back-To-Back Repeatability||+/- 0.015 in.||+/- 0.38 mm|
|Maximum Pressing Force - Mount Press||200 short tons||181 metric tons|
|Maximum Pressing Force - Pre-Mount Press||19 short tons||17.2 metric tons|
|Press Ram Stroke - Mount Press||36 in.||914 mm|
|Ram Extend Speed||250 in/min||6350 mm/min|
|Maximum Pressing Speed - Mount Press||11.3 in/min||287 mm/min|
|Electrical Power||60 kW|
|Hydraulic Reservoir||200 US gallons||757 liters|
Wheel Set Dimensions
|Maximum Wheel Diameter||44 in.||1120 mm|
|Minimum Wheel Diameter||28 in.||711 mm|
|Maximum Axle Length||102 in.||2590 mm|