The Simmons Wheel Set Measurement System (WSM-440) is a metrology machine that automatically inspects new or reconditioned railroad wheel sets. The WSM-440 measures wheel diameter and width, flange thickness and height, wheel rim thickness, profile deviation, back-to-back, and radial and axial wheel tread runout. Measurements are stored in a local database at the machine or can be networked to transfer the data to a remote server. If interfaced with a facility supervision system, those measurements can be used to automatically route the wheel set for maintenance.
Wheel sets are delivered to the WSM-440 via shop rails and once captured, the measuring heads are automatically positioned against each wheel tread. The wheel set is rotated while the wheel profiles are measured. The contact probes are fitted with linear gauges in the measuring arms. The measurement results for both wheels will be displayed on local HMI and saved to the database. The control system determines if the wheel set conforms to the predefined geometry for that particular wheel set type.
|Length||164.2 in.||4171.9 mm|
|Width (with Panel)||87.7 in.||2227.6 mm|
|Height||88 in.||2235.1 mm|
|Weight||11500 lbs.||5216 kg|
|Wheel Diameter||+/- 0.005 in.||+/- 0.13 mm|
|Flange Thickness||+/- 0.012 in.||+/- 0.3 mm|
|Flange Height||+/- 0.012 in.||+/- 0.3 mm|
|Rim Thickness||+/- 0.020 in.||+/- 0.5 mm|
|Wheel Back-To-Back||+/- 0.010 in.||+/- 0.25 mm|
|Wheel Profile Deviation||+/- 0.008 in.||+/- 0.2 mm|
|Wheel Width||+/- 0.020 in.||+/- 0.5 mm|
|Radial Runout at Tapeline on Centers||+/- 0.002 in.||+/- 0.05 mm|
|Plane Runout||+/- 0.012 in.||+/- 0.3 mm|
*Applicable up to maximum ambient temperature change of +/- 18°F (+/-10°C).
|Electrical Power Requirement||27.5 kW|
|Compressed Air||15 scfm @ 80 psi|
Wheel Set Dimensions
|Maximum Wheel Diameter||42 in.||1067 mm|
|Minimum Wheel Diameter||28 in.||711 mm|
|Maximum Axle Length||90 in.||2286 mm|
|Maximum Weight||￼4000 lbs.||1820 Kg|