The precision of the linear guide the design requirements

( 1) Refers to the movement precision guidance precision component along a straight line guide rail bearing guide surface movement when the trajectory of the degree of accuracy. The main factors influencing the guide accuracy have on the surface of the guide bearing guide structure types of geometric accuracy and guide rail, rail contact precision, surface roughness, linear guide rail and the rigidity of the supporting members, guide the oil film thickness and oil film stiffness, as well as the guide and the thermal deformation of bearing parts and so on. The geometry precision of linear motion guide generally includes: vertical plane and horizontal plane straightness; Parallelism between the two guide surface. Guide rail geometric accuracy can be used on the guide rail length error or on unit length of said. ( 2) Accuracy stable accuracy stable refers to keep original geometric accuracy in the process of linear guide work ability. The precision of the slideway properties mainly depends on the guide rail wear resistance and dimensional stability. Abrasion resistance and guide material matching, force, machining accuracy, lubrication methods related to the factors such as the performance of the protection device, in addition, the residual stress in the guide rail and its supporting members may also affect the precision of the slideway stable. ( 3) Sensitivity and positioning accuracy motion sensitivity refers to motion artifacts can achieve the minimum travel; Positioning accuracy refers to motion artifacts will be effected according to the require the ability to stop at the specified position. Motion sensitivity and positioning accuracy and guide rail type, friction characteristics, movement speed, transmission stiffness, component quality and other factors. ( 4) Running smoothness linear guide running smoothness is guide rail in slow motion or trace moves don't appear the performance of the crawling phenomenon. Stability and linear guide rail structure, guide material matching, lubrication condition and characteristic of lubricant and rigidity of transmission system of the movement of guide rail and other factors. ( 5) Vibration resistance and vibration resistance stability is the guide rail pair bear the ability of forced vibration and impact, and stability is to point to in a given operation under the condition of absence of self-excited vibration performance. ( 6) The stiffness of rail stress deformation resistance. Deformation will affect the relative position between the component and guidance accuracy, it is particularly important for precision machinery and instrument. Deformation including linear guide rail deformation of ontology and guide contact deformation, both of which should be considered. ( 7) Molding process molding process refers to the linear guide rail pair ( Including the guide member) To the difficulty of the processing. On the premise of meet the design requirements, should try to be manufacture and easy maintenance, low cost.