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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Analysis of machining precision of SKF imported bearings Analysis of machining precision of SKF imported bearings
When positioning the workpiece; the degree of freedom affecting the machining accuracy requirements of SKF imported bearings is necessary to be constrained, and the degree of freedom that does not affect the machining accuracy requirements of SKF imported bearings can be constrained or unconstrained; depending on the specific situation, it is necessary to determine the workpiece according to the machining requirements of the workpiece. The degree of freedom of constraints is the primary problem that should be dealt with in workpiece positioning. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Because the dimension A2 of the depth direction of the groove is required; therefore, the requirement restricts the degree of freedom of movement in the z direction, because the bottom surface of the demand groove is parallel to the c-plane; therefore, the degree of freedom of transformation X around the x-axis and the degree of freedom y around the y-axis are constrained because To ensure the slot length A1; therefore, the freedom of movement X in the x direction is to be constrained, because the guide groove is in the middle of the pressure plate; common to the long circular hole; therefore, the freedom of movement y in the y direction and the freedom of transformation around the z axis This way; when machining the guide groove; 6 degrees of freedom should be constrained. This 6-degree-of-freedom positioning method is called complete positioning.
The professor said that if the plane is ground on a surface grinder; the requirement is to ensure the thickness B; the working surface and the bottom surface should be parallel; at this time; according to the processing requirements of SKF imported bearings, only three degrees of freedom of Z, X and Y can be restrained. The positioning method with less than 6 degrees of freedom according to the requirements of parts processing requirements is called incomplete positioning. For example, when the workpiece is processed in a certain process; the degree of freedom that is constrained according to the processing requirements of the part is not constrained. .. Under-positioning is not allowed to be presented during part processing.
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Analysis of machining precision of SKF imported bearings
Source: China Bearing Network Time: 2013-12-08