dimensional tolerance

简明释义

尺寸公差

英英释义

例句

1.Different materials may require different dimensional tolerance levels.

不同材料可能需要不同的尺寸公差水平。

2.In manufacturing, maintaining dimensional tolerance is crucial for product quality.

在制造过程中，保持尺寸公差对产品质量至关重要。

3.The engineer specified a dimensional tolerance to ensure that the parts fit together correctly.

工程师指定了尺寸公差以确保零件能够正确配合。

4.Quality control checks often focus on dimensional tolerance to avoid defects.

质量控制检查通常关注尺寸公差以避免缺陷。

5.The dimensional tolerance for this component must not exceed 0.01 mm.

这个部件的尺寸公差不得超过0.01毫米。

作文

In the field of manufacturing and engineering, precision is paramount. One of the critical concepts that engineers and designers must understand is dimensional tolerance. This term refers to the permissible limit or limits of variation in a physical dimension. In simpler terms, it defines how much a particular measurement can deviate from its intended value while still being acceptable for functionality and performance. Understanding dimensional tolerance is essential for ensuring that parts fit together correctly and operate as intended.For example, consider the assembly of a mechanical device where various components must fit together with a specific degree of precision. If the tolerances are too tight, it may be difficult or even impossible to assemble the parts. Conversely, if the tolerances are too loose, the assembled product may not function properly, leading to potential failures. Therefore, setting appropriate dimensional tolerance levels is crucial in the design phase to avoid costly adjustments later in the manufacturing process.There are several types of dimensional tolerance that engineers use, including unilateral and bilateral tolerances. Unilateral tolerance allows variation in one direction only, either above or below the nominal dimension. On the other hand, bilateral tolerance permits variation in both directions. For instance, if a shaft is specified with a diameter of 10 mm ± 0.1 mm, this means it can measure anywhere between 9.9 mm and 10.1 mm. This level of precision ensures that the shaft can fit into its corresponding hole without issues.The importance of dimensional tolerance extends beyond just fitting parts together. It also affects the performance and longevity of the final product. In industries such as aerospace, automotive, and medical devices, even the smallest deviation can lead to catastrophic failures. Therefore, engineers must meticulously calculate and communicate these tolerances in technical drawings and specifications.Moreover, modern manufacturing techniques, such as computer numerical control (CNC) machining, have made it easier to achieve precise tolerances. However, achieving these tolerances still requires skilled operators and robust quality control measures. Regular inspections and measurements must be conducted to ensure that the produced parts meet the specified dimensional tolerance requirements.In conclusion, dimensional tolerance is a fundamental concept in engineering that plays a vital role in the design and manufacturing processes. By understanding and applying the principles of dimensional tolerance, engineers can ensure that their products meet the necessary standards for functionality, safety, and reliability. As technology continues to advance, the ability to maintain precise tolerances will remain an essential skill for engineers and manufacturers alike, ultimately leading to better products and increased customer satisfaction.

在制造和工程领域，精度至关重要。工程师和设计师必须理解的一个关键概念是尺寸公差。这个术语指的是物理尺寸中的允许变动限度或范围。简单来说，它定义了某一特定测量值在仍然可接受的功能和性能下，可以偏离其预定值的程度。理解尺寸公差对于确保零件正确配合并按预期运行至关重要。例如，考虑一个机械装置的组装，其中各种组件必须以特定的精度相互配合。如果公差过于严格，可能会导致零件难以甚至无法组装。相反，如果公差过于宽松，则组装后的产品可能无法正常工作，从而导致潜在的故障。因此，在设计阶段设定适当的尺寸公差水平对于避免在制造过程中进行昂贵的调整至关重要。工程师使用几种类型的尺寸公差，包括单边公差和双边公差。单边公差只允许在一个方向上变化，无论是高于还是低于标称尺寸。另一方面，双边公差允许在两个方向上变化。例如，如果一个轴的直径被规定为10毫米±0.1毫米，这意味着它可以在9.9毫米到10.1毫米之间测量。这种精度确保了轴能够无问题地适配到其对应的孔中。尺寸公差的重要性不仅仅局限于零件的配合。它还影响最终产品的性能和使用寿命。在航空航天、汽车和医疗设备等行业，即使是最小的偏差也可能导致灾难性的故障。因此，工程师必须在技术图纸和规格中仔细计算和传达这些公差。此外，现代制造技术，如计算机数控（CNC）加工，使得实现精确的公差变得更加容易。然而，实现这些公差仍然需要熟练的操作员和强大的质量控制措施。必须定期进行检查和测量，以确保生产的零件符合指定的尺寸公差要求。总之，尺寸公差是工程中的一个基本概念，在设计和制造过程中发挥着至关重要的作用。通过理解和应用尺寸公差的原则，工程师可以确保他们的产品满足功能、安全和可靠性的必要标准。随着技术的不断进步，保持精确公差的能力将继续成为工程师和制造商必不可少的技能，最终导致更好的产品和更高的客户满意度。