Key points for specification selection include specifying the laying area, calculating load requirements, determining the track cross-section and length, and calculating the number of tracks. The installation direction must follow the cross-shaped fixing principle.
T-slot tracks, track beams, track rails, and foundation track rails require careful consideration of the load-bearing capacity of the tracks, as their strip structure means their fixed load capacity is smaller than that of large foundation platforms such as power test benches. Specification selection should follow these steps: First, determine the length × width dimensions of the laying area; second, calculate the static and dynamic load requirements, selecting tracks with larger cross-sections and higher material strength, and reserving a safety factor of at least 1.2 times; the common track length range is 1500-5000mm; finally, calculate the theoretical number of tracks required by dividing the total area by (single track length × single track width). The installation direction of the tracks directly affects load-bearing safety and equipment fixation effectiveness, and must follow the cross-shaped fixing principle, meaning the T-slot direction on the track should be perpendicular to the placement direction of the fixed equipment to ensure that the bottom of the equipment can contact multiple tracks, resulting in even load distribution. Parallel laying is strictly prohibited to avoid concentrated loads that could cause rail deformation or equipment loosening. If the load is too high, larger dimensions can be used. This can be addressed by improving the material and increasing the laying density. For material selection, HT250/HT300 gray cast iron can be used for standard applications, while QT500-7/QT600-3 ductile iron is recommended for heavy-duty or complex environments. The working surface hardness of the rails is typically HB170-240, and they must undergo artificial annealing (600-700℃) and natural aging (2-3 years) to ensure stable accuracy. The accuracy requirements after installation are: horizontal deviation ≤1mm within any 1m length, ≤2mm over the entire length; horizontal deviation between corresponding points on the rails ≤1mm; parallelism deviation between any two rails ≤2mm.
