Application of form and position accuracy theory in haulage winch

The form and position accuracy of parts includes the form accuracy and the position accuracy. The tolerance of detail drawing reflects the design accuracy of parts. A reasonable tolerance can ensure the quality of products as well as reduce the products cost. The position accuracy of parts is reflected through the reasonable dimensioning of detail drawing in the design of haulage winch. In the production process, there are still some difficulties to understand the form accuracy of detail drawing. The law of freedom and how to use it to analyze the position tolerance and the tolerance zone are introduced. The application of the law of freedom is illustrated through an example, so as to provide a sample and accurate way to understand the dimensioning position tolerance.