positional tolerance

简明释义

位置容限

英英释义

例句

1.The positional tolerance on the drawing indicates how much the feature can deviate from its true position.

图纸上的位置公差指示特征可以偏离其真实位置的程度。

2.A tighter positional tolerance often leads to increased production costs.

更严格的位置公差通常会导致生产成本增加。

3.In this assembly, we need to check the positional tolerance of each component to guarantee proper fit.

在这个装配中，我们需要检查每个组件的位置公差以保证合适的配合。

4.The engineer specified a positional tolerance to ensure that the hole is within acceptable limits.

工程师指定了一个位置公差以确保孔在可接受的范围内。

5.Understanding positional tolerance is crucial for quality control in manufacturing.

理解位置公差对制造中的质量控制至关重要。

作文

In the field of engineering and manufacturing, precision is key to creating components that fit together seamlessly. One important concept that engineers must understand is positional tolerance. 位置公差 refers to the allowable variation in the position of a feature on a part. This concept is crucial because it dictates how much deviation is acceptable for a component to still function correctly within an assembly. For example, when designing a mechanical part that needs to fit into another part, the positional tolerance ensures that even if there are slight variations in the manufacturing process, the parts can still be assembled without any issues. Without proper positional tolerance, parts may not align correctly, leading to malfunction or failure of the entire system.Understanding positional tolerance requires knowledge of geometric dimensioning and tolerancing (GD&T). GD&T is a system used to define the allowable limits of variation in the geometry of parts. It provides a clear and concise way to communicate how much deviation from the nominal size and shape is permissible. When engineers specify positional tolerance, they are essentially setting the boundaries within which a feature must lie. This can be particularly important in complex assemblies where multiple parts interact with each other. For instance, consider the assembly of a car engine. Each component must fit precisely with others to ensure optimal performance. The positional tolerance for each part is carefully calculated to accommodate factors such as thermal expansion and manufacturing inaccuracies. If one part has a tight positional tolerance, it means that it must be manufactured very precisely, whereas a looser tolerance allows for more variability. Engineers must find a balance between manufacturability and functionality when determining these tolerances.Moreover, the implications of positional tolerance extend beyond just fitting parts together. They also impact the overall quality and reliability of products. For example, in the aerospace industry, where safety is paramount, strict positional tolerance specifications are enforced to ensure that every component meets stringent safety standards. Any deviation could lead to catastrophic failures, making the understanding of positional tolerance not just an academic exercise but a matter of life and death.In conclusion, positional tolerance is a fundamental aspect of engineering design and manufacturing. It plays a critical role in ensuring that components fit together properly and function as intended. By understanding and applying positional tolerance, engineers can create reliable and efficient products that meet the demands of various industries. As technology continues to advance, the importance of precise positional tolerance will only grow, making it essential for current and future engineers to master this concept.

在工程和制造领域，精度是创造无缝配合组件的关键。工程师必须理解的一个重要概念是位置公差。位置公差指的是零件上某一特征位置的允许变化。这一概念至关重要，因为它规定了组件在组装时仍能正常工作的可接受偏差。例如，在设计需要与另一部件配合的机械零件时，位置公差确保即使在制造过程中存在轻微变化，零件仍然可以顺利组装。如果没有适当的位置公差，零件可能无法正确对齐，导致整个系统的故障或失效。理解位置公差需要掌握几何尺寸和公差（GD&T）的知识。GD&T是一种用于定义零件几何形状变异的允许限度的系统。它提供了一种清晰简洁的方式来传达允许的尺寸和形状偏差。在工程师指定位置公差时，他们实际上是在设定特征必须位于的边界。这在多个部件相互作用的复杂装配中尤为重要。例如，考虑汽车发动机的装配。每个组件必须与其他组件精确配合，以确保最佳性能。每个部件的位置公差经过仔细计算，以适应热膨胀和制造不准确等因素。如果一个部件具有严格的位置公差，这意味着它必须非常精确地制造，而较宽松的公差则允许更多的变动。在确定这些公差时，工程师必须在可制造性和功能性之间找到平衡。此外，位置公差的影响不仅仅局限于零件之间的配合。它们还影响产品的整体质量和可靠性。例如，在航空航天工业中，安全至关重要，因此强制执行严格的位置公差规范，以确保每个组件符合严格的安全标准。任何偏差都可能导致灾难性的故障，使得理解位置公差不仅仅是学术练习，而是生死攸关的问题。总之，位置公差是工程设计和制造的基本方面。它在确保组件正确配合和按预期功能方面发挥着关键作用。通过理解和应用位置公差，工程师可以创造出可靠且高效的产品，以满足各行各业的需求。随着技术的不断进步，精确的位置公差的重要性将只会增加，这使得当前和未来的工程师必须掌握这一概念。