An Error Prediction Method for Helical Tool Turning Trajectories

Abstract

The invention relates to a helical cutter turning trajectory error prediction method and belongs to cutter turning trajectory prediction methods. The method includes: calculating a residue differencedelta 1 between adjacent two turning trajectory cutter contact points; calculating a residue difference delta 2 among straight lines between adjacent two turning trajectory cutter contact points; calculating arc height error delta 3: calculating step length 1BC between adjacent cutter contact points, solving, judging a relation between a distance 13 from the middle point of the step length to Z axis and 14, determining whether the arc height error is positive or negative, solving the arc height error delta 3 through a derived formula, comparing the arc height error delta 3 with required processing accuracy delta 0, determining processing parameters for subsequent processing if requirements are met, modifying corresponding parameters, calculating and re-comparing the above three kinds of errors if the requirements are not met. The method is used for predicting related errors in helical processing trajectories, and processing parameters are determined finally by constraining each error value to acquire processing trajectories.

Description

technical field [0001] The invention relates to an error prediction method for a turning track of a tool, in particular to an error prediction method for a turning track of a spiral tool. Background technique [0002] Helical tool turning trajectory is widely used in existing processing methods. For example, in the processing of optical free-form surfaces, tool trajectory planning generally adopts equal-angle and equal-arc-length tool trajectories. And in the processing of compound feature surfaces with these features, the trajectory planning of helical tool turning can also be used. For the trajectory planning of helical tool turning, it is necessary to consider the error related to constraints to set the trajectory planning parameters during the trajectory planning process. [0003] Existing mechanical processing usually adopts the method of trying to measure the processing accuracy, which is time-consuming and laborious, and has a certain degree of blindness. Error predic...

AI Technical Summary

Problems solved by technology

[0004] The invention provides an error prediction method for the turning trajectory of a spiral tool to solve the problem that the existing error solution method has relatively large defects and loopholes, and the processing accuracy cannot be guaranteed for the processed curved surface features.

Images