The invention discloses a layered
database model based on material-structure-process-process correlation, which is used to solve the technical problem of poor practicability of the existing layered
database model. The technical solution is to divide the working conditions along the
machining trajectory according to the tool-workpiece contact state, part structure and position relationship, and correspond the part structural features with the
processing technology and process parameters. In terms of data storage, it is divided into
cutting basic data layer, process basic data layer and process data layer. The
cutting basic data layer stores data such as tool
coating,
cutting edge geometry, and constitutive equations; the process basic data layer adds tool parameters, process methods, and tool-workpiece meshing relationships on the basis of the cutting basic data layer; the process data layer stores additional tools ‑Spindle subsystem information, workpiece‑fixture subsystem information,
processing environment information and CNC
system information. The invention realizes the two-way mapping between different levels of data, and has good practicability.