The sealing plane has an important application in the industrial field. To ensure seal, its machining and assembly quality must be strictly controlled. In order to evaluate the assembly quality of the sealing plane in an accurate, efficient and visual way from the perspective of sealing performance, a new method, based on the high-precision point cloud is presented, using the medial axis transform(MAT) to evaluate the quality of seal plane assembly method. First, based on high-definition metrology (HDM) obtains the high-precision point cloud data of sealing planar that is with waviness characteristics, and then registers the point cloud data according to the assembly location and position of the parts. Finally, based on the MAT, calculate the leakage channel of sealing planar, so that the assembly quality of the sealing planar can be evaluated. It focuses on the study of using MAT to calculate leakage channel, and improves the fast orientation method of the point cloud data in the normal vector estimation. In order to verify the effectiveness of the method proposed, a verification experiment was conducted on the head deck faces of a leaking engine block and a cylinder head. The results show that the proposed method can accurately identify the location of the leak and simulate the shape of the leak channel based on different segmentation thresholds. This method can make qualitative and quantitative theoretical predictions and evaluations on the seal plane sealing performance.
ZHANG Xiaobing
,
LIU Haijiang
. Assembly Quality Evaluation of Sealing Planar Based on High Precision Point Cloud[J]. Journal of Mechanical Engineering, 2018
, 54(11)
: 121
-128
.
DOI: 10.3901/JME.2018.11.121
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