Rolling type selection

Rolling type selection Abstract: China's CNC machine tool industry, urgently develop mechanical components function classes commonly used English: processing methods Yantai Universal Group launched CNC turret high speed steel smelting MSC.ADAMS an MPV based on improved handling and stability analysis of one kind New high-precision mold material commonly used in Beijing advent R14 system variable is set skill vigilance "NC Education" overheating EDM discharge mechanism of TC4 titanium alloy combined machine tools and automatic line technology trends guru's skills can not be lost with the SiAlON ceramic tool efficient milling of cast iron Yangzhou University successfully developed non-circular rings CNC lathe programming source curve quarter ellipse What is CAD? Can compensate for wear of the cutting edge is not shovel tooth milling cutter design and manufacture of high-efficiency small lathe features Japanese VB-based environment shaper cutters CADProCAM - professional multi-axis CNC machining positioning error differential bearing life calculation method to choose the type of basic role of contact with basic concepts of relative deformation term life of a rolling bearing a gasket material appeared a sign of fatigue propagation relative to the other before a washer washer rpm reliable bearing life and reliable operation of a group of nearly the same conditions on the same bearing expect to achieve than the specified percentage of single bearing life reliable bearing service life of more than required load bearing washer relative probability.

(A) the basic concepts and terminology

A life

Means a set of bearings, one ring (or washer) or rolling of the material appeared before the first signs of fatigue propagation, a ring (or washer) relative to the other ring (or washer) the number of revolutions.

2, reliability (ie, the reliability of bearing life)

Refers to a group of operating under the same conditions, nearly the same expected bearing life reaches or exceeds the specified percentage. The reliability of a single rolling bearing that meet or exceed the lifetime probability.

3, static load

When the bearing ring or gasket when the relative rotational speed is zero (or the thrust bearing to the heart) or when the direction of the rolling element raceway when no motion (linear bearings), the load acting on the bearing.

4, static and dynamic load

When the bearing ring or gasket when the relative rotation (to the heart or thrust bearings) or when the roll bearings element in the rolling direction of movement (linear bearings), the load acting on the bearing.

5, rated life

Radial or axial basic dynamic load rating Basic dynamic load rating based on the life of the predicted value.

6, the basic rating life

Reliability associated with 90% of rated life.

7, the radial basic dynamic load rating

Means a set of rolling bearings can withstand the constant imaginary radial loads, loads in the basic rating life of one million rpm. The single row angular contact bearings, this load causes the bearing rings to each other is purely radial displacement is generated between the radial component of the load.

8, the axial basic dynamic load rating

Refers to the hypothetical role of the center in a constant bearing axial load bearing loads in the basic rating life of one million rpm.

9, radial (or axial) equivalent dynamic load

Refers to a constant radial load (or central axial load), the load, the rolling bearing having the same load of the actual life.

10, radial (or axial) Basic static load rating

Means with a rolling body raceways, and the total amount of permanent deformation corresponding radial static load (or the central axis of the static load). If at zero load, roller and raceway (roller bearing) is assumed to be normal or bus (line contacts) when the maximum contact stress, the rolling element and raceway contact produces a total permanent deformation of the rolling element diameter of 1/10000. For single row angular contact bearings, radial load rating of the bearing rings relative to each other due to pure radial displacement of the radial component of the load.

11, radial (or axial) Static equivalent load

The radial static load (or central axial static load) causes the maximum stress by rolling element and raceway contact at the total amount of permanent deformation resulting from the actual load conditions the same as the total amount of permanent deformation.