Research On The Technology And Methods Of Solid Cemented Carbide Cutting Tool Parametric Modeling

Compared with other materials,solid cutting tools made in cemented carbide are high-rigidity,more wearable,and have better intensity and toughness,with faster cutting speed and higher efficiency,which are widely used and become the best developed product among various cutting tools.Modern manufacturing industry tends to be highly precise,highly efficient and reliable,which requires the design of cutting tools to be intelligent and customized.As for the traditional method by two-dimensional CAD,pretermissions and mistakes often occur.In addition,many complex cutting tools are hardly expressed directly by two-dime(?) drawings.Thus three-dimensional parameterized design has become the trend of designing cutting tools.3D models not only include more complete information but also allow performing CAE in order to improve product's design.Three-dimensional parameterized technology can be an excellent method for initial design,product modeling as well as serial design,multi-plan comparison and dynamic design,because of its strong draft drawing and size-driving functions. Developing three-dimensional CAD system to improve design efficiency has turned into an urgent requirement for enterprise,which can also generate CAD graphics automatically according to some related standard and achieve unified management of these drawings and product data.Parameterized model not only includes the geometric information,but also retains the topology graph,a variety of design knowledge and constraints.To products with same structure but different size,we can use the same model's parameters to describe the geometry.When product changes in some local shape, the system can maintain the original intent and constraints,with automatic generation of new graphics.This system is based on 3D design method,using VC++ to perform secondary development on the platform of SolidWorks.After making 3D models for solid carbide cutting tools,constraint relation among the design dimensions is packaged into the models to structure an object class when the system calls.Then a database is found to store the models and maintain or update the product data.The case-based reasoning(CBR) approach makes full use of existing models to design cutting tool,by calling SolidWorks API functions to update the size of corresponding instance in the database while a new tool is designed. Two-dimensional engineering drawings will be automatically generated from models and they can be two-way driven from 3D to 2D.Three-dimensional parameterized design overcomes the traditional shortcomings of two-dimensional CAD technology and effectively improves the design flexibility.This will be of a great significance to improve the efficiency of cutting tools' design,which can also ennance the competitiveness of products and the innovation of cutting tools' design.