3C product shell transition area machining path self-adaptive planning method

Abstract

The invention relates to a 3C product shell transition area machining path self-adaptive planning method which comprises the steps that a workpiece is preliminarily aligned, a workpiece clamping position error is eliminated, and correction of a technological reference is completed. After preliminary alignment, a large number of discrete point sets are taken as optimization input, on-machine measurement adaptive path first optimization is carried out, and measurement points are obtained; an outer contour measurement path is planned, and an error value of an avoidance point and each measurementpoint is obtained; the direction of the measurement track is changed according to the avoidance point, a non-interference measurement path is generated, and measurement error compensation is carried out on the measurement point obtained by first optimization according to an error value to complete cutter location path point compensation. According to the method, the density of the measurement points can be changed along with the change of the contour curvature, the larger the change of the contour curvature to be measured is, the denser the measurement points are, the reasonable obstacle avoidance distance given by the obstacle avoidance points is determined through the method, the measurement path cannot be placed too much, and the planning process of the collision-free measurement path is achieved under the condition that the precision and the efficiency are both considered.

Description

technical field [0001] The invention belongs to the field of on-machine measurement of 3C product shells, and in particular relates to a method for adaptive planning of processing paths in transition areas of 3C product shells. Background technique [0002] After the inner cavity milling and surface injection molding processing of the 3C product shell on the CNC machine tool, the shell blank will be deformed by processing and clamping. At this time, if the transition area is chamfered (including surface chamfering) according to the established procedure , The width of the chamfer is inconsistent, and it is difficult to meet the appearance requirements of consumers for the product. At the same time, in the fierce market competition, the replacement cycle of 3C products is getting shorter and shorter, and the product quality requirements are getting higher and higher, and the failure of chamfering as the final process will lead to waste of expensive raw materials and processin...

AI Technical Summary

Problems solved by technology

[0002] After the inner cavity milling and surface injection molding processing of the 3C product shell on the CNC machine tool, the shell blank will be deformed by processing and clamping. At this time, if the transition area is chamfered (including surface chamfering) according to the established procedure , the width of the chamfer is inconsistent, it is difficult to meet the appearance requirements of consumers for the product

Theoretically speaking, the higher the measurement point density, the higher the measurement accuracy and the lower the measurement efficiency. How to plan the measurement point density to ensure the balance between measurement efficiency and accuracy is also one of the difficulties in on-board measurement.

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