roller linear SGR25 SGB25

Square type roller linear guide rail SGR25 SGB25

(1) Guidance accuracy Guidance accuracy refers to the accuracy of the movement trajectory of the moving component when it moves along the guide surface of the linear guide rail. The main factors that affect the guide accuracy are the geometric accuracy of the guide rail bearing surface, the structural type of the guide rail, the contact accuracy of the guide rail pair, surface roughness, the stiffness of the guide rail and supports, the oil film thickness and oil film stiffness of the guide rail pair, as well as the guide rail and support. Thermal deformation of parts, etc.

The geometric accuracy of linear motion guide rails generally includes: straightness in the vertical plane and horizontal plane; parallelism between the two guide rail surfaces. The geometric accuracy of the guide rail can be expressed as the error over the entire length of the guide rail or the error per unit length.

(2) Accuracy retention Accuracy retention refers to the ability of the linear guide to maintain the original geometric accuracy during operation. The accuracy maintenance of the guide rail mainly depends on the wear resistance and dimensional stability of the guide rail. Wear resistance is related to factors such as material matching, stress, machining accuracy, lubrication method and protection device performance of the guide rail pair. In addition, the residual stress in the guide rail and its supports will also affect the accuracy maintenance of the guide rail.

(3) Motion sensitivity and positioning accuracy Motion sensitivity refers to the minimum stroke that a moving component can achieve; positioning accuracy refers to the ability of a moving component to stop at a designated position as required. Movement sensitivity and positioning accuracy are related to factors such as guide rail type, friction characteristics, movement speed, transmission stiffness, and quality of moving components.

(4) Movement stability The movement stability of linear guide rails refers to the performance of the guide rails that do not crawl when moving at low speeds or in small amounts. Smoothness is related to factors such as the structure of the guide rail, the matching of guide rail materials, the lubrication condition, the properties of the lubricant, and the stiffness of the transmission system of the guide rail movement.

(5) Vibration resistance and stability Vibration resistance refers to the ability of the guide rail pair to withstand forced vibration and impact, while stability refers to the performance of no self-excited vibration under given operating conditions.

(6) The ability of rigid guide rails to resist force deformation. Deformation will affect the relative position and guidance accuracy between components, which is particularly important for precision machinery and instruments. The deformation of the linear guide includes the deformation of the guide rail body and the contact deformation of the guide rail pair, both of which should be considered.

(7) Structural processability Structural processability refers to the ease of processing the linear guide pair (including the components where the guide rail pair is located). On the premise of meeting the design requirements, manufacturing and maintenance should be as convenient and low-cost as possible.