**Abstract**
High-precision and digital abrasive belt grinding technology has become essential as China continues to advance in key engineering fields such as energy, transportation, and national defense. These sectors demand high-quality structural components with improved manufacturing efficiency, machining accuracy, and surface finish. The performance of critical devices like power conversion systems is significantly influenced by these factors. However, traditional manual sanding and grinding methods are still widely used domestically, leading to high labor intensity, serious dust pollution, low processing precision, and poor product quality. This creates a significant gap between current capabilities and the high-reliability requirements of nuclear power and navigation blades, which hinders the development of major national energy and defense technologies.
**High-Precision and Digital Belt Grinding Technology**
With technological progress, the need for higher quality in critical components has grown. The profile manufacturing efficiency, machining precision, and surface roughness directly impact the performance and efficiency of energy and power conversion systems. Despite this, many parts are still finished manually, resulting in inefficiency, high costs, and inconsistent quality. This gap restricts the advancement of national projects, especially in the aerospace and marine industries.
**Typical Applications**
- Aero-engine blade grinding
- Turbine blade grinding
- Propeller blade grinding
- Whole turbine disc polishing
- High-grade shaped sink efficient edge grinding
- Titanium alloy tube polishing
**Features of High-Precision, Digital Grinding Equipment**
1. Multi-axis CNC technology is used due to the complex curved surfaces involved.
2. Constant pressure grinding heads are implemented to maintain consistent pressure, especially for blade polishing.
3. The machine tools themselves require high precision.
4. Online detection systems are integrated with CNC machining for real-time monitoring.
5. Machine size varies depending on the part being processed.
**1. High-Grade Shaped Water Tank High-Efficiency Edge Processing**
By combining advanced numerical control with abrasive belt grinding, this technology solves the challenges of automatic edge finishing for high-grade water tanks, filling a technical gap in China. In 2006, the company successfully processed over 100,000 sets of star basin products for Guangdong FRANKE (Switzerland), passing factory inspections and exporting 30,000 units abroad, saving around 120,000 euros in imported equipment costs.
**2. Zirconium Alloy Tube Abrasive Belt Grinding**
Zirconium alloy cladding tubes are crucial for containing fuel pellets and protecting them from corrosion and mechanical damage. To meet strict standards, they undergo multiple processes, including wall thickness grinding. Ensuring uniform wall thickness is vital for cold processing and vacuum annealing. Surface treatment removes defects and contaminants, improving the final quality of the tubes.
**3. Marine Propeller Blade Surface High-Efficiency Precision Belt Grinding**
Marine propellers often rely on manual polishing, which leads to inconsistent surface quality and poor dimensional accuracy. A joint development project with Chongqing Sanma Haida resulted in a CNC belt grinding machine that achieved a grinding accuracy of ≤0.05mm and a surface roughness of Ra ≤ 0.11–0.29 μm, meeting engineering requirements since 2010.
**4. Turbine Blade Seven-Axis Six-Linkage High-Efficiency Precision Belt Grinding**
This process uses multi-axis CNC technology to achieve high precision in grinding turbine blades, ensuring smooth and accurate surface finishes.
**5. Compressor Blade High-Precision Belt Grinding**
Precision is critical for compressor blades, which must maintain tight tolerances and surface integrity to ensure optimal performance.
**6. Aeronautical Blade Seven-Axis Six-Linkage High-Efficiency Precision Belt Grinding**
Aero-engine blades are made from difficult-to-machine materials like nickel-based alloys and titanium. Their complex geometry and high-performance demands make precise grinding essential. Traditional methods often result in high scrap rates and poor consistency, limiting blade quality and engine reliability.
**Belt and Abrasive Selection**
Advanced abrasive belts, such as 3M’s pyramid-grinding belts, offer superior performance with enhanced cutting efficiency and longer life. New types of abrasive belts, like triangular ceramic alumina, provide sharp edges that reduce heat generation and improve surface finish.
**Superhard Materials**
Synthetic diamond and cubic boron nitride are used for hard and brittle materials. They offer high hardness, wear resistance, and thermal conductivity, reducing tool wear and improving machining efficiency while maintaining precision.
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