Method for quickly converting reference coordinates in self-adaptive machining

Abstract

The invention provides a method for quickly converting reference coordinates in self-adaptive machining, which belongs to the technical field of machining and comprises the following steps of: 1) building a three-dimensional scanning system workbench and a machine tool workbench; 2) establishing a theoretical model and a theoretical coordinate system, and setting a production numerical control machining program according to the theoretical model and the theoretical coordinate system; 3) placing a part to be processed on a three-dimensional scanning system workbench, performing three-dimensional scanning to form a solid model, and establishing a solid coordinate system; and 4) carrying out comparison fitting on the solid model and the theoretical model, calculating a coordinate deviation value between the solid coordinate system and the theoretical coordinate system, offsetting the coordinate deviation value to a program origin of a numerical control machining program, and carrying outpart machining. According to the method, the machining precision of the part can be guaranteed, and the operation process and the operation principle are very simple.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and relates to a reference conversion method during mechanical processing, in particular to a fast conversion method of reference coordinates in self-adaptive processing. Background technique [0002] In the prior art, the transformation method of the reference coordinates of part machining is as follows: the part is placed on the workbench and fixed, and three standard balls are respectively placed at the three corners of the workbench. Use a 3D scanning system to scan the part and three standard spheres to form a solid model. A best fit is made between the solid model and the theoretical model of the part (without three standard spheres). For parts with uniform allowance everywhere, use three spheres in the theoretical model to establish a theoretical coordinate system, and compile NC programs for machine tool processing under this coordinate system. Use the crane to move the wo...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the complex operation process of the standard ball in the prior art and the large error in the alignment process, the present invention proposes a fast conversion method of reference coordinates in adaptive machining, which uses a quick-change tooling system to make The physical coordinate system is fixed on a point of the machine tool, and it is not necessary to establish a physical coordinate system for each part. The specific technical scheme is as follows:

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