Method for adjusting position and posture of cutter shafts for grinding blade-type parts

Abstract

The invention discloses a method for adjusting the position and posture of cutter shafts for grinding blade-type parts. The method comprises the following steps: 1, a cutter contact coordinate systemxi (L) and a workpiece coordinate system xi (w) are established, and cutter shaft vectors are expressed in the workpiece coordinate system as in the specification, wherein in the formula, alpha is a heel angle of the contact face of a cutter and a workpiece, and beta is a slip angle of the contact face of the cutter and the workpiece; 2, cutter contacts are discretized, the included angle theta<i,i+1> between the cutter shaft vector of the i cutter contact and the cutter shaft vector of the <i+1> cutter contact is obtained, and the motion angular speed omega<i, i+1> between the icutter contact and the <i+1> cutter contact is calculated according to the formula; and 3, the optimization target function is established, according to the optimization target function, the cutter shaft vector position and posture meeting the minimum angular speed is solved, and the motion relationship of all the shafts of a numerical control grinder is solved. The cutter can conduct smooth machining in the grinding process, the phenomenon of overcutting or interference at curvature sudden change positions of the blade-type parts is avoided, and the surface machining quality is guaranteed.

Description

technical field [0001] The invention relates to the grinding processing of blade parts, in particular to a method for adjusting the position and posture of a blade shaft during grinding processing of blade parts. Background technique [0002] When grinding blade parts with sudden curvature changes, the grinding effect is best when the normal vector direction coincides with the tool axis vector direction. However, for complex surface parts with sudden changes in curvature, if the tool axis vector is controlled to coincide with the surface normal vector for grinding, it will cause the edge of the part to be overcut due to the sudden change of the tool axis vector during the grinding process. Interference occurs, and the motion axis of the high-end CNC grinding equipment exceeds the motion thread. [0003] At present, segmental grinding is generally used for edge grinding of blade parts with sudden curvature changes. In the process of segmental grinding, the sharp angle pheno...

AI Technical Summary

Problems solved by technology

In the process of segmental grinding, the sharp angle phenomenon occurs at the joint of the corner due to the adjustment of the speed and the change of the position and orientation of the tool axis, so that the curve of the grinding edge is not smooth, that is, it is easy to produce waste parts; and the mutation sometimes causes interference due to excessive curvature mutation can not be processed

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