梯形丝杆的介绍

Standard for Precision Fitting of Non-standard Screw Nuts

作者:   日期:2019-07-09  来源:  关注:0

In order to ensure a certain performance of the equipment, it is necessary to meet its specified standards, non-standard screw is no exception, then what are the standards of non-standard screw nut coordination? Next, let's take a look.


1. Tolerance fit of screw and nut.


YF45Mnv steel is all non-quenched and tempered steel with strength of 85Kgf/mm. Its tensile strength, fatigue property and wear resistance are superior to those of conventional 45 Quenched and tempered steel and 40Cr steel.


2. Lubrication of screw nuts.


It is suggested that oil lubrication be used for non-standard screw, especially oil pool lubrication or drip oil lubrication. Oil pool lubrication is a more appropriate method, because this method can meet harsh conditions, such as high speed, heavy load or external heat transfer, and make non-standard screw cooling, while oil drop lubrication is suitable for medium and low speed and medium and light load situations.


3. Material selection of non-standard screw nuts.


Quenching and tempering is the dual heat treatment of quenching and high temperature tempering. Its purpose is to make the workpiece have good comprehensive mechanical properties. There are two kinds of quenched and tempered steel screw, carbon quenched and tempered steel and alloy quenched and tempered steel. Whether carbon steel or alloy steel, its carbon content is controlled strictly.


In addition, non-standard screw nuts require that the threads move accurately in the movement of the key components, mainly using alloy steel processing, after heat treatment processing, to ensure its excellent mechanical properties, and in the manufacturing process, rough and fine processes are separated, effectively ensuring the reasonable distribution of stress components.


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