external thread

简明释义

外螺纹

英英释义

例句

1.When assembling the furniture, make sure the external thread is aligned with the corresponding hole.

在组装家具时，确保外螺纹与相应的孔对齐。

2.The external thread on the pipe fitting ensures a tight seal when connected.

管件上的外螺纹确保连接时密封良好。

3.You need a wrench that fits the external thread of the screw.

你需要一个适合螺钉外螺纹的扳手。

4.The bolt features an external thread that allows it to be easily screwed into a nut.

这个螺栓具有外螺纹，可以轻松地拧入一个螺母。

5.The design of the cap includes an external thread for easy attachment to the bottle.

瓶盖的设计包括一个外螺纹，便于与瓶子连接。

作文

In the world of engineering and manufacturing, precision is key. One of the critical components that ensure this precision is the use of threads in mechanical assemblies. Among the various types of threads, the external thread (外螺纹) plays a significant role in connecting different parts of a machine or structure. An external thread is defined as a helical ridge that is formed on the outer surface of a cylindrical object, such as a bolt or a screw. This design allows for easy engagement with a corresponding internal thread, which is found inside a nut or a hole, thereby creating a strong and secure connection.The importance of external threads can be observed in numerous applications. For instance, in construction, bolts and screws with external threads are used to hold together various structural components, ensuring stability and safety. The strength of these connections is paramount, especially in buildings and bridges where any failure could lead to catastrophic consequences.Furthermore, the manufacturing process of external threads involves precise machining techniques. Engineers must consider factors such as the pitch, diameter, and depth of the thread to ensure compatibility with the corresponding internal threads. The standardization of these measurements is crucial in industries where interchangeable parts are necessary. For example, the Unified Thread Standard (UTS) and the Metric Thread Standard provide guidelines for the specifications of external threads, allowing manufacturers to produce components that fit seamlessly together.In addition to their mechanical applications, external threads also play a role in everyday items that we often take for granted. Consider the simple bottle cap; the external thread on the cap allows it to screw onto the neck of the bottle, creating a seal that preserves the contents inside. Without the precision of external threads, many products would not function as intended, leading to waste and inefficiency.Moreover, advancements in technology have led to innovative designs and materials for external threads. For instance, the use of lightweight materials such as aluminum or composite plastics has become common in industries where reducing weight is essential, such as aerospace and automotive. These new materials require careful consideration of the thread design to maintain strength while minimizing weight.In conclusion, the external thread (外螺纹) is a fundamental element in the realm of engineering and manufacturing. Its applications range from heavy machinery to everyday products, highlighting its versatility and importance. Understanding the characteristics and manufacturing processes associated with external threads is crucial for engineers and designers alike. As technology continues to evolve, the design and implementation of external threads will undoubtedly adapt, providing even greater efficiency and functionality in the future.