A Method of Calibrating the Surface Machining Trajectories of Castings Based on Feature Measurement
A technology of surface machining and calibration method, which is applied in the field of casting processing and can solve problems such as inability to realize automatic operation
Active Publication Date: 2020-04-24
王东
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Problems solved by technology
Because the precise position of the area to be processed and the parts to be processed vary from casting to casting, it is necessary to rewrite the program command for each part when using CNC machine tools, and it cannot realize complete automatic operation.
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Embodiment 1
[0059] Such as figure 1 As shown, the present invention introduces a visual measurement system based on a three-dimensional scanner 400 for a numerically controlled machine tool 100 . The function of the measurement system is to scan the casting 500 with the 3D scanner 400 to obtain the 3D point cloud data of the casting 500, to clarify the spatial position and posture of the casting 500, and the point of the theoretical 3D model placed at the reference processing position. Cloud data is used for feature matching to calculate (1) the deviation of the spatial position and posture of the casting 500 from the reference processing pose, and output the rotation matrix and translation vector; (2) the actual casting 500 exceeds the margin of the theoretical data model (defined as the amount to be processed), the output margin exceeds the height of the datum plane. The CNC machine tool 100 adjusts the casting 500 to the reference processing position according to the position and post...
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The invention relates to a casting part machining method, and relates to a casting part surface machining track calibration method based on feature measurement. Through calibration, a corresponding relation between a standard three-dimensional scanner coordinate system and a numerical control machine tool coordinate system is established; a scanner scans the surface of a casting part to obtain coordinate values of three-dimensional point cloud data under the scanner coordinate system, the surface point cloud data of the casting part and the point cloud data of a theoretical mathematical modelof the casting part are subjected to feature matching, and the position and the posture deviation between the actual to-be-machined casting part and the theoretical mathematical model is obtained; anda numerical control machine tool adjusts the position and the posture of the actual casting part to reach the reference machining position. According to the casting part surface machining track calibration method based on the feature measurement, a three-dimensional scanner-based measuring system is introduced for the numerical control machine tool, the measuring system is used for carrying out scanning measurement on the to-be-machined casting part, comparing the to-be-machined casting part with a theoretical to-be-machined position, the machining track of the numerical control machine toolis calibrated, and the whole-course automatic intelligent machining on the large-scale casting part is realized.
Description
technical field [0001] The invention relates to a processing method for castings, in particular to a surface processing method for castings. Background technique [0002] At present, the residual removal and surface treatment of large castings are mostly done manually. This processing process is relatively complicated and cumbersome, and the processing and processing efficiency is low, which limits the increase in production capacity. Therefore, consider using CNC machine tools to process the surface of large castings to improve production efficiency. Due to the particularity of the production of castings, the exact position and the amount of each casting to be processed are different, and the processing trajectory is not exactly the same, so it is impossible to use the existing CNC machine tools to realize full automatic machining. [0003] The operation of the current CNC machine tool is to fix the casting on the workbench of the machine tool through the tooling. The ope...
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IPC IPC(8): B23Q15/12B23Q15/14
CPCB23Q15/12B23Q15/14
Inventor 王东
Owner 王东