Study on the Reverse Designing for Engine's Cylinder Head

Abstract

The model of a gasoline engines cylinder head with 4 cylinders was reconstructed by CAD through slicing method and using Imageware and UG. The reverse design methods used for complex interior structure surface were explored based on slicing method through remodeling the cylinder head. The technologies of reverse design such as the measure method of points cloud, points cloud data treatment, and curve modeling were studied. The methods can be referenced for reverse designing the similar parts.

Reverse design based on slicing method

“…(1) The contrast between processed and unprocessed surfaces is so large that they can be clearly distinguished after the cylinder head made of cast aluminum is cut. Thus, no special filling material is used for embedding in the cylinder head [9].…”

“…Then, it can be seen that the maximum deviation is 0.2 mm and the percentage is 5.8%; the minimum deviation is − 0.01 mm and the percentage is 7.9%; the mean deviation is 0.058 mm. According to the relevant literature [4,9] and reverse design engineering experience, the model error of the reconstructed airflow is so small that it can be acceptable.…”

“…Finally, 3D contour data of the part are obtained. Chen et al [9] explored the reverse design method for airflow model of cylinder head through the slicing method and using NX10 [8] and Imageware [10], but the technical quality of reverse model is relatively low due to the lack of considering the actual shape of flow section of the airflow and practical engineering design requirement during the reverse design. Luo et al [11] investigated reconstructing method for the model of cylinder head based on the slicing method and reconstructed a cylinder head with four cylinders.…”