Research on the influence and application of measurement uncertainty in the detectionof mechanical parts
测量不确定度在机械零件检测中的影响及其应用探究

摘要

测量不确定是在机械加工测量数值中引入的一个概念，通常情况下需要将机械零件加工测量中的不确定度控制在一定范围内，这样才能充分保障机械零件测量结果的可靠性和客观性。本文研究中首先对测量不确定度的概念、来源等进行介绍，并从测量方法、测量器具等多个方面对影响测量不确定度的因素进行探讨，根据实际案例可知，在进行机械零件测量的过程中，要以零件尺寸精度要求为基准，并充分结合测量不确定度以及测量不确定度的传播规律等因素来实现检测方法、检测器具的科学选择，这样才能有效提升机械零件加工检测结果的精确性，才能有效提升机械产品品质。

Abstract

Measurement uncertainty is a concept introduced in machining measurement values. Generally, it is necessary to control the uncertainty in machining measurement of mechanical parts within a certain range, so as to fully guarantee the reliability and objectivity of measurement results of mechanical parts. In this paper, firstly, the concept and source of measurement uncertainty are introduced, and the factors affecting measurement uncertainty are discussed from many aspects, such as measurement methods and measuring instruments. According to the actual cases, in the process of measuring mechanical parts, the measurement method should be based on the dimensional accuracy requirements of parts, and fully combined with the measurement uncertainty and the propagation law of measurement uncertainty The scientific selection of testing instruments can effectively improve the accuracy of machining and testing results of mechanical parts and the quality of mechanical products.