Forklift structure multidimensional numerical control preset

The secondary development of Pro/E is based on the above-mentioned gantry design calculation process, through the Pro/TOOLKIT secondary development method provided by Pro/E, using its rich library function of the underlying resource graphic data operation, using VC++ program development tools and MFC programming. The method integrates the specific graphics processing and calculation analysis method of the forklift mast into an independent program module, adds a dedicated forklift gantry design drop-down function menu on the Pro/E main interface, and realizes the key design variable input and output dialog window control The digital application of visual human-computer interaction process. The result is a professional design software that is easy to operate and user-friendly.

The basic idea Pro/TOOLKIT secondary development is based on the programming on the feature database, and each feature corresponds to an element tree. The element tree defines the attributes of the type, reference information, sketched section, dimension information, positional relationship and other attributes. It is not only a heavy workload but also a difficult task to construct a three-dimensional model entirely through programming geometric features. Therefore, it is generally first to create a three-dimensional model of the entity as a template, and then to add, delete, modify, and other forms of the feature library. To get new models that meet user requirements. Therefore, the basic idea of ​​this paper is: to build a three-dimensional structural solid model of the portal frame with Pro/E interactive graphics system, relying on the VC++ program development system and Pro/TOOLKIT function functions, to achieve the operation of the database of mast structure features, complete Develop a digital virtual manufacturing system for gantry systems that combines digital design, component assembly, structural strength stiffness finite element analysis.

Feature Modeling Product design features refer to a group of graphic elements that have a specific meaning and represent a certain geometric configuration of the product. According to the characteristics of the method, location, etc. of forming an entity, it is usually divided into basic physical features formed by stretching, rotation, and scanning. Based on solid features such as holes, chamfers, ribs, and symmetry using tangible entities, primitive editing features that are copied, mirrored, and arrayed, and feature features that reflect the position of the primitives, interdependence between them can be achieved. Establish the parent-child relationship of features. A three-dimensional solid model is composed of a large number of features in the form of building blocks. Therefore, the feature is the basic unit of the model. The process of model creation is the process of adding various types of feature tuples in a certain order. This idea of ​​feature modeling provides great convenience for manipulating modifications and managing entity elements.

Because the forklift's inner and outer masts, forks, forks, and lift and tilt cylinders are all symmetrical about their vertical center planes, the modeling needs to be combined with the analysis of the programming control requirements and the design requirements of the gantry changes. To make full use of these characteristics to plan the chain of dimension relationships that the parts depend on, so that the changed model can always maintain the consistency. This can reduce the difficulty of programming and improve the quality of program execution.

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