The precision requirements for processing tungsten alloy shielding parts are very high because they are typically used in medical equipment, which involves strict radiation protection standards and equipment functionality requirements. Below are the specific precision requirements during the processing of tungsten alloy shielding parts:
- Dimensional Precision: Tungsten alloy shielding parts usually require precise dimensions to ensure they fit the design specifications of medical equipment and achieve optimal radiation protection. The processing precision typically needs to reach the micron level (μm) or even higher, especially when fitting with other parts of the equipment to ensure accurate alignment and prevent radiation leakage.
- Precision Range: Generally, the dimensional tolerance for tungsten alloy shielding parts is between ±0.1mm to ±0.5mm. However, for some specialized medical equipment, the precision requirement may be higher, reaching ±0.01mm.
- Fit Requirements: The processing precision of tungsten alloy shielding parts also needs to consider the complex shapes of the internal spaces of the equipment to ensure the shielding parts fit accurately, avoiding improper installation due to dimensional errors.
- Surface Finish: The surface finish of tungsten alloy shielding parts is also required to be high, particularly in medical equipment. A smooth surface helps reduce radiation reflection, prevents contamination accumulation, and reduces friction and wear during installation. The surface roughness (Ra value) typically needs to be controlled below 1.6μm, or even lower, to ensure the smoothness meets the protection requirements.
- Surface Treatment: In addition to size and shape precision, surface treatment is crucial. Tungsten alloy shielding parts may undergo polishing, sandblasting, or other treatments to ensure the surface is flawless and to increase corrosion resistance and oxidation resistance.
- Geometrical Shape: Tungsten alloy shielding parts often need to be manufactured into complex geometrical shapes, such as bends, holes, and chamfers, according to the specific needs of the medical equipment. These shapes require very high processing precision, especially when creating holes or processing complex profiles. Precise geometrical shapes are essential for ensuring the functionality and safety of the equipment.
- Hole Precision: If tungsten alloy shielding parts need holes (e.g., for mounting components or heat dissipation), the size and location precision of these holes are crucial. Hole diameter tolerances are typically required to be controlled within ±0.05mm to ensure accurate positioning and functionality.
- Density Control: The density of tungsten alloy is a key factor influencing its radiation shielding effectiveness. During the processing, it is crucial to ensure the uniformity of the alloy to avoid density variations caused by processing, which can affect the shielding performance. This is especially important in high-precision radiation protection equipment.
- Density Uniformity: The internal structure of the tungsten alloy should be strictly controlled during processing to ensure uniform density distribution, preventing impurities or voids from compromising the shielding effect.
- Fine Processing Requirements for Materials: Tungsten alloy is a high-density, hard material that is difficult to process. Therefore, advanced processing techniques such as electrical discharge machining (EDM), CNC milling, and laser cutting are used to achieve higher precision and ensure the quality of the processed parts. Different processing methods may have varying precision requirements, especially in processes such as cutting, engraving, and drilling, where careful control of process parameters is necessary.
Conclusion: The processing precision requirements for tungsten alloy shielding parts are high, and it is essential to ensure accurate dimensions, smooth surfaces, precise shapes, and consistent density and material properties. Processing errors can directly affect radiation protection performance and equipment functionality, so high-precision processing technologies such as EDM and CNC machining are typically used. The required precision is often at the micron level or even higher.
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