Method for modifying model in real time when milling cutter cuts blank in VR scene

Abstract

The invention belongs to the field of machining and manufacturing, and particularly relates to a method for modifying a model in real time when a milling cutter cuts a blank in a VR scene. The methodcomprises the following steps of defining a system error for measuring the simulation precision as delta; determining modification points on a track surface; calculating the depth of the modificationpoint of a typical cutter type A; calculating the depth of the modification point of a typical cutter type B; calculating the depth of the modification point of a typical cutter type C. According to the method, the speed of entity modification is independent of the number of machining codes; the calculation process is stable and reliable; the display of calculation results is independent of observation modes and light-of-sight directions, and real-time zooming out, zooming in, rotation and translation can be achieved in the modification process or after modification; the whole actual cutting process can be displayed, and error measurement of a machining result is carried out.

Description

technical field [0001] The invention belongs to the field of machining and manufacturing, and in particular relates to a real-time modification method of a model when a milling cutter cuts a blank in a VR scene. Background technique [0002] In the process of creating a virtual reality scene, building a 3D model is the most basic step, and the 3D model in practical virtual scenes is often a static mesh body composed of triangular topology surfaces, which cannot be changed in real time according to user needs. shape of the model. Especially in the process of CNC machining, how to express the process of modifying the part by the tool in real time, that is, how to realize the real-time modification of the solid model, has become a difficult point in the construction of virtual reality scenes. [0003] The traditional method is to use the wireframe method, which can only be used to check whether there are obvious errors in the CNC code, and cannot display the entire real cuttin...

AI Technical Summary

Problems solved by technology

[0003] The traditional method is to adopt the wireframe method, which can only be used to check whether there are obvious errors in the NC code, and cannot display the entire real cutting process and measure the error of the machining results; the second is to use the Boolean solid modeling technology, which is This method uses a standard mathematical model to represent the processing blank and tool, but there are still some problems: for complex parts, the waiting time and data volume increase greatly, and the time consumed in the intersection process and discrete display process will reduce its real-time performance, and Calculation stability during the intersection process will affect the entire simulation process; the third is to use the discrete method of view, which can achieve good display effect and real-time performance, but the processing results are not continuous

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