Transmission technology of precise trapezoidal lead screw pair
The radial matching clearance affects the matching properties of the trapezoidal lead screw pair,and the side clear-ance that can store lubricating oil and provide thermal expansion allowance directly affects the continuous stability of the transmission of the trapezoidal lead screw pair.Aiming at the radial matching clearance,a digital tooth thickness caliper was proposed to control the normal tooth thickness at the middle diameter of the inner and outer trapezoidal threads,thus indirect-ly controlling the middle diameter of the inner and outer trapezoidal threads.A Visual Basic radial clearance control program was developed to achieve the optimal radial clearance of the trapezoidal lead screw pair.The influence of radial matching clearance and half of thread angle on the transmission meshing was studied,and the wear law of the trapezoidal lead screw pair and the matching nut was summarized.Through test verification,the wear law could achieve the best engagement of the half of thread angle of the trapezoidal lead screw tooth,and could effectively solve the problems of serious wear and poor self-locking,thus improving the transmission stability of the trapezoidal lead screw.
trapezoidal lead screw pairradial matching clearancehalf of thread anglemeshing
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