| 摘要 |
<p>A rail system for use with a motion carriage, comprising a base profile constructed of a lightweight alloy, with longitudinal grooves along its sides, and strips having a higher wear resistance than the lightweight alloy disposed within each of the side grooves, such that the motion carriage clamps the strips to the base profile part in the region of the motion carriage. The strips are not otherwise firmly attached to the base profile such that they are free to move longitudinally relative to the base profile. This longitudinal freedom of motion enables the strips to expand and contract with change of temperature independently of expansion and contraction of the base profile. The base material may be an aluminium alloy, having thermal expansion characteristics similar to those of a base structure on which the system is attached, and the strip material may be a steel, having higher thermal expansion characteristics.</p> |
