Numerical control NC code virtual and real verification method based on RGB-D camera

Abstract

The invention discloses a numerical control NC code virtual and real verification method based on an RGB-D camera, and belongs to the field of machine tool machining simulation, and the method comprises the following steps: calibrating the internal and external parameters of a color camera and a depth camera in the RGB-D camera, and converting pixel coordinates into camera coordinate system coordinates; defining a workpiece coordinate system by using a redundant mark, and acquiring an image of the mark by using the RGB-D camera; extracting pixel coordinates of the feature points from the acquired image; calculating a transformation matrix from a camera coordinate system to a workpiece coordinate system; obtaining a calculation model for converting coordinates of a tool center point cameracoordinate system into coordinates of a workpiece coordinate system; constructing and training a neural network for cutter position detection; calculating cutter coordinates in real time after training; inputting NC codes and setting virtual workpiece size information by the machine tool; and verifying whether the tool performs machining on a tool path specified by the NC code or not. According tothe method, the problems of incomplete machine tool models in the simulation NC codes, difference between the virtual machine tool models and the actual machine tool and the like are solved, and thereliability and authenticity of machine tool NC code simulation are improved.

Description

technical field [0001] The invention belongs to the field of machine tool processing simulation, and in particular relates to an RGB-D camera-based numerical control NC code virtual-real verification method. Background technique [0002] The machine tool needs to verify the NC code before actually processing the workpiece. The traditional verification methods can be mainly divided into two categories. One is to use the tool to test the workpiece on the actual machine tool to verify the NC code, and the other is to simulate the NC code on the virtual machine tool. The verification and detection of NC codes in the software is whether there are other abnormalities. [0003] For the actual processing test method, each test process needs to clamp the workpiece with a fixture and replace the workpiece. The operation is time-consuming and wastes materials, and there are dangers such as knife collision in the test process, which poses a threat to the personal safety of the operators...

AI Technical Summary

Problems solved by technology

[0003] For the actual processing test method, each test process needs to clamp the workpiece with a fixture and replace the workpiece. The operation is time-consuming and wastes materials, and there are dangers such as knife collision in the test process, which poses a threat to the personal safety of the operators.

For virtual machine tool processing simulation software, there are many limitations

For the machine tool that needs to verify the NC code, the software needs to support the machine model and system, and it cannot guarantee that the actual machine condition is consistent with the ideal condition of the machine tool in the software, and the NC code verification results in the simulation software cannot guarantee the correctness of the actual machining

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