Method for improving contact precision of pushing screws small end surfaces in super nut and gasket

Abstract

The invention discloses a method for improving the contact precision of pushing screws small end surfaces in a super nut and a gasket. The method specifically comprises the following steps of 1, a setof pushing screws to be machined are uniformly arranged in threaded holes in the periphery of a super nut before grinding, and a certain pre-tightening force is exerted on the pushing screws so as toprevent the pushing screws from loosening during grinding; 2, an external thread of a grinding tool is installed in the internal large threaded hole in the middle of the super nut with the pushing screws in the step 1 and is pre-tightened, enabling a small step surface of the grinding tool to be tightly attached to the bottom end surface of the super nut; and 3, a whole set of grinding tool to beground after being installed in the step 2 is placed on a workbench, so that the tool positioning surface of the grinding tool is sucked on a grinding machine sucking disc, a grinding machine wheel is used for carrying out unified grinding and machining on the small end surfaces of all the pushing screws, and until all the small end surfaces of the pushing screws are ground.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment processing technology, and relates to a method for improving the contact precision between the small end surface of a jack screw in a super nut and a gasket. Background technique [0002] At present, in the connection, compression, transmission and other structures of mechanical equipment, thread pair connections are more widely used. where super bolts such as figure 1 with figure 2 As shown, the application effect is more prominent in some working conditions with strict requirements on anti-loosening, impact, heavy load, etc., and the operation is relatively simple. Screws will generate a large axial thrust. Since the jacking force of each jacking screw acts on the hardened gasket through the small end surface of the top, the contact accuracy between the small end surface of each jacking screw and the gasket is required to be high, that is, after installation, each The verticali...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for improving the contact accuracy between the small end surface of the jack screw and the gasket in the super nut, which solves the problem in the prior art that the small end surface of the jack screw and the gasket end surface have poor contact accuracy. Pushing the screw itself generates additional bending moment, which may also cause the problem of uneven force on the super nut along the circumferential direction

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