During full 3D design process

MBD model has become a accurate and real-time single data source

which integrate into all kinds of information about design

inspection

manufacture and assembly. MBD model realizes digital manufacturing and assembly

without two dimensional drawings. Fasteners have various types and the number of fasteners is more than half of the total number of parts. Based on the characteristics of low design assembly efficiency and low accuracy of fasteners

this article introduces a new expression for fasteners

analyses the organization of the relative information about the fasteners to establish standardized design assembly expression. To consider all factors

such as the position of the components

the load demand and the degree of deformation

designners decide the specifications of fastenerand use 3D point-line to express the fasteners under the relative assembly file

which makes design assembly expression for fasteners standardized.