The main dimensions of China Mechanical Parts often need to be determined by theoretical calculations. The theoretical design calculation is based on the structural characteristics and working conditions of the part, and it is rationally simplified into a certain physical model. The theory, theoretical mechanics, fluid mechanics, tribology, thermodynamics, mechanical vibration and other theories are used or the design is derived using these theories. Formulas, experimental data to design. Theoretical design calculations can be divided into design calculations and calibration calculations.
1. Design calculation. The relevant main dimensions of the part are directly obtained according to the design formula.
2. Check calculation. The dimensions of each part of the part are known, and the design formula is used to check whether it meets the relevant design calculation criteria.
In order to make the results of the design calculation more realistic, we should refer to the empirical relationships and statistical data accumulated in the past successful design and practice. For some large and complex important parts, model experiments or physical experiments can be carried out when necessary.
Precautions for mechanical part design:
The product design process is an intellectual activity process that embodies the designer's innovative thinking activities. The design process is a process of gradually approaching the solution and gradually improving it. The following points should also be noted during the design process:
1. The design process should have a global perspective. It should not only consider the design object itself, but treat the design object as a system to deal with the relationship between “human-machine-environment”.
2. Be good at using creative thinking and methods, pay attention to the solution of various solutions, and avoid the limitations of solving problems.
3. Each stage of the design should have clear objectives, pay attention to the evaluation and optimization of each stage, in order to find a solution that meets both the functional requirements and the maximum possible realization.
4, pay attention to feedback and the necessary work cycle. Problem solving needs to be abstract to concrete, from partial to comprehensive, from uncertainty to certainty.