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Analysis: Delineation guidelines for fine rails
Source: China Bearing Network Time: 2013-07-28
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1. The error satisfaction criteria are satisfied with the following three requirements; in order to make the rail system complete the errors to each other:
.1) It is necessary to set a central elastic link between the guide rails; for example, a roll plastic belt (sheet) or a fluid film.
.2) There must be a pre-tightening force between the guide rails in order to compensate for the touch error.
.3) The manufacturing error of the guide rail should be less than the deformation of the central elastic body (component).
2. Accuracy and mutual non-interference criteria can not be affected by the accuracy of the guide rails when they are produced and used. For example, the linearity of the rectangular guide rail and the linearity of the side guide rails do not affect each other during production. Flat-V guide rails The change of the lateral dimension of the combined guide rail does not affect the accuracy of the guide rail.
3. Dynamic and static conflict factors close to the standard when drawing the guide rail pair should make the dynamic and static conflict factors of the touch surface of the guide rail as close as possible; in order to achieve high repeat positioning accuracy and low speed stability; roll rail, plastic plate or plastic sheet Sliding rail; the collision factor is small and the static and dynamic conflict factors are close.
4. The guide rail pair active collation criteria should make the guide rails have high precision; it is necessary to make the guide rail pairs have the characteristics of active engagement. The horizontal guide rails can be attached by the components of the moving members, and the other guide rails need to be attached with spring force or roller pressure. Hehe.
5. All touch criteria The length of the fixed rail is necessary to ensure that the moving rail is in the two extreme orientations of the maximum stroke; the full length of the fixed rail touch (does not exceed the fixed rail); to ensure that the rail pair is always touched during the touch.
6. Resilience deformation and thermal deformation criteria When the guide rail and its support members are subjected to force or temperature changes; when drawing the guide rail and its support members; strive to deform it to become a desired shape. For example, the beam guide of a gantry machine tool; Convex; to compensate for the tortuous deformation of the headstock (or tool holder) component.
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