Electric Power Equipment Model Manufacturer
Case Study: Transformer Scale Model Production Process
This case study details the production process for a scale model of a transformer, showcasing the integration of 3D printing model techniques and industrial model manufacturing principles.
1. Design and Material Preparation
Scale Model Design:
The scale model is designed at a 1:20 scale to accurately replicate the real transformer. Based on the original factory design drawings, the model is divided into modules: iron core, coil, shell, and auxiliary components (radiator, terminals, etc.). 3D drawings are created using CAD software to ensure precise dimensional matching between all components, facilitating the creation of a 3D printing model where necessary.
Material Selection:
* Main Structure: The outer shell combines ABS plastic for structure with an acrylic panel serving as a transparent observation window, balancing durability with display functionality typical in industrial models.
* Core Components: The analog coil is fabricated from brass wire wound precisely according to the design specifications. The iron core consists of stacked iron sheets, designed to be detachable for clear visualization of the magnetic circuit, a key feature in scale models of such equipment.
* Auxiliary Components: Terminals and heat sinks are machined from aluminum alloy to enhance the metallic texture and realism often found in industrial models.
2. Production Process
Component Processing:
- Coil Winding: Brass wire is wound with precise control over the number of turns and fixed onto an insulating bracket. Different winding colors are used to distinguish the primary and secondary windings, a detail common in 3D printing models for clarity.
- Iron Core Assembly: Individual iron sheets are laser-cut and stacked. They are bonded together using epoxy resin, and the edges are meticulously polished to eliminate burrs, ensuring the integrity of the magnetic circuit component.
- Shell Forming: The ABS shell is CNC engraved to achieve its curved shape. The acrylic observation window is seamlessly bonded using UV glue, a technique often used in industrial model construction for optical clarity.
Integration and Functionality:
The dynamic system incorporates a micro LED strip embedded within the shell, simulating the internal current flow path through the transparent section. The brass coil is connected to a magnetic spring switch, allowing the lighting effect to dynamically reflect the simulated power state.
3. Post Processing and Coloring
Surface Treatment:
* Joints are carefully polished using 600 and 1200 grit sandpaper, with defects filled using atomic ash and achieving a final mirror finish, a standard process for high-fidelity scale models.
* A gray primer is applied, particularly enhancing adhesion on PETG material components used in advanced 3D printing models.
Industrial Style Coating:
* Base Color: Dark gray metallic spray paint (e.g., Tamiya TS-77) is applied to the main body, simulating the appearance of a standard transformer casing, characteristic of many industrial models.
* Detail Differentiation: The coil retains its natural copper color or is selectively sprayed matte black for contrast. The iron core is coated with an imitation rust color to represent aging, and terminals are finished with silver enamel paint for conductivity.
* Identification: Custom water stickers displaying voltage levels and logos are applied. These are protected with a clear coat to withstand wear, a common finishing step for scale models.
4. Restoration Enhancement Techniques
Detail Enhancement:
* Realistic heat sink textures are added to components using etching techniques.
* Cable joints are meticulously simulated using 0.1mm copper wire, adding authenticity.
Aging Treatment:
* A combination of staining solution and dry powder color application simulates realistic oil stains.
* High-detail metal wear effects are captured using dry scanning techniques.
Dynamic Verification: The synchronization between the internal lighting (LED strip) and mechanical actions (coil movement) is rigorously tested and adjusted. LED brightness is calibrated to ensure the current path visualization is clear and effective. This meticulous process achieves a final scale model restoration rate exceeding 90%.
5. Case Summary
This project successfully balanced display impact and operational functionality through the application of modular design, multi-material composite technology, and industrial-grade finishing techniques, resulting in a high-quality scale model.
- Material Adaptation: The combination of ABS plastic and metal components effectively balanced lightweight construction with the required realism for an industrial model.
- Interdisciplinary Craftsmanship: The process integrated 3D printing model capabilities for complex parts with traditional manual refinement for fine details.
- Dynamic Demonstration: The inclusion of functional lighting (LED strip) significantly enhanced the interactive teaching potential for understanding electronic control systems, fulfilling the requirements for an effective scale model.
