A Brief Overview of 3D Design for Machined Parts

For machined parts, the traditional design and manufacturing process involves first completing the part’s design, then unfolding it to generate a flat layout diagram. Only after obtaining the dimensions from this unfolded diagram can the material be accurately cut and processed accordingly. Accurately designing sheet metal components and precisely deriving the unfolded dimensions from the original part’s design specifications are essential prerequisites for machining these parts. However, for flat plate components, due to process-related factors such as material properties, plate thickness, and corner radii, the actual unfolded dimensions of the sheet metal do not simply match the design dimensions—instead, they require a series of carefully calculated, process-oriented dimensional adjustments. Unfortunately, the conventional approach remains manual, resulting in high labor intensity, low efficiency, and an increased risk of errors.

　　Currently, in the machining parts industry, CAD The application of the technology is still in the exploration and early stages, involving 3D design of workpieces and the transition from 3D to 2D Process development is a critical step that must be addressed when developing sheet metal software. Currently, the few existing sheet metal software systems typically require high-performance hardware and software support, resulting in significant investment costs. Therefore, how to fully leverage computers' powerful data-processing and computational capabilities, combined with human expertise and experience, to create software products that are cost-effective, practical, and tailored to China's unique national conditions, has become an urgent and realistic challenge. Successfully integrating 3D design and process development functionalities has now emerged as a key issue that urgently needs to be resolved in the software development process.

　　3D design of machined parts: The 3D design of machined parts differs from that of general components. Typically, metal sheets are transformed into finished parts through processes such as bending, welding, bottoming, and other techniques applied to a base material with uniform thickness. From the perspective of 3D implementation, defining the 3D information for sheet metal while fully capturing its unique structural characteristics is no easy task. That’s why, in sheet metal systems, solid models… ( Sheet metal parts ) The 3D design is broken down into the various designs that make up the entity. In short, it’s the 3D generation of 2D designs—what’s known as “ Growth ” Law: Define the blank space to find its position. This step involves the user specifying a defined shape in three-dimensional space, and it is completed by drawing the shape in the two-dimensional drawing area. From the program's perspective, these two steps essentially involve determining the coordinate transformation matrix and U ， V Within the parameters (U ， V) Coordinate values. Therefore, the entire 3D Design is a 2D And 3D A process of mutual definition and interaction.

　　In summary, the above content This section will illustrate the fundamental principles and methods of machining software in 3D design and manufacturing using just a few simple examples. In fact, the system is highly practical, incorporating numerous advanced algorithms and boasting an impressive level of intelligence. The machining system has already been widely adopted by many enterprises, and real-world applications have demonstrated its stable performance, effectively meeting users' design requirements.