Ball screw is a precision and highly efficient transmission components, in modern industrial production, the use of ball screw has already been seen everywhere. It is a high speed, reversible, long life, high rigidity, zero clearance, synchronized, high sensitivity, easy maintenance and other advantages conquered the loading and unloading. So, in production, how to choose a more suitable ball screw?
First ball screw nominal model selection, the nominal model mainly refers to the nominal diameter and lead of the screw. The initial phase of the design can be based on the technical requirements of machine tools (mainly including load, rapid traverse speed, servo motor speed, etc.) of the initial selection of ball screw model, and then calculate and check, the calculation results meet the design requirements can be finalized.
Second is the selection of lead precision of ball screw, in the ball screw accuracy parameters, the influence of the lead errors on the machine tool positioning accuracy is the most obvious. Usually in the initial design of the screw of any 300mm stroke change quantity V300P should be less than the target set positioning accuracy of the 1/3 ~ 1/2, to determine in the final accuracy checking. Ball screw precision is divided into seven levels, ie, 1-7 and 10, level 1 is the highest accuracy, decrease progressively in turn.
Finally is the selection of ball screw support, in the design of CNC machine tools, the ball screw support typically by selecting the "fixed - support" or "fixed - fixed." "Fixed - support" is relatively easy to assemble and has good rigidity and high accuracy, mainly used in medium speed, larger stroke, heavier load environments; "fixed - fixed" is relatively difficult to assemble, good rigidity, high precision, often used in high-speed, large stroke, heavy load environment.
Source: http://www.machineballscrew.com Ball Screw Assembly.
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