Accuracy design and selection method of hydraulic cutting machine
In general, in addition to the positional relationship and structure of the components, it is important to determine the fit between the components, especially the dimensions of the precision and performance of the machine. Pay attention to indicate them. The relationship between the two.
When performing assembly drawing design, there are analogy, calculation and test methods for determining the limit tolerance and the fit. The calculation method and the test method are methods for determining the coordination relationship by means of calculation or experiment. It has the characteristics of reliability, accuracy and science, but it takes a lot of cost and time, and the stone is too economical.
The analogy method is a method based on the use of components and the reference to the experience of the same type of machinery. The basic point is statistical investigation, investigating the cooperation and use of the same type or similar structural components of the same type, and then analyzing the analogy to determine its cooperation.
The analogy method is simple and easy, and the selected cooperation focuses on inheriting the actual experience of design and manufacture in the past, and most of them have been verified by Ding, with high reliability, and it is convenient for product serialization and standardized production. The process is also good. Due to the above advantages, the determination of the limit fit has always been used as an effective method. Currently, this method is still the main method of mechanical design and manufacturing.
The mechanical precision design of hydraulic cutting machine is an important part of machine design. Whether it is designing complex and sophisticated boring machines, rockets or simple machines such as reducers, it is necessary to consider the conceptual concept design, the knot, the art design and the precision design. When designing for precision, you need to consider how to achieve the functional requirements of the machine, and also consider whether it can be manufactured as required.
The task of precision setting is how to use the relevant tolerances, geometric tolerances, surface roughness and other items to express the allowable difference in the manufacturing of the mechanical parts, thus manufacturing a machine that meets various performance indicators.