How to do mechanical design 5, how to do mechanical design

The description of the design process of the machine has not yet been harmonized, but the differences are not too significant. Propose the goal of designing a new machine according to the needs of production or life, etc. At this point, there is generally only a vague idea of the machine to be designed.

Background investigation, grasp the relevant information For the machine to be designed, conduct demand investigation, market research, feasibility demonstration, etc.

Clarify the design objectives According to market research and technology, etc., further clarify the functions that the machine should have, and put forward the relevant environmental, economic, design and manufacturing cycle constraints, etc., to form a design task book.

Determine the functional technical requirements to solve the key problems in the technology, mainly for the machine function proposed in the design task book, analysis, experiment, and finally determine the function and technical parameters of the machine.

Principle design According to the basic principles of machine design, the designer formulates a plurality of principle design schemes (machine working principle or mechanism motion diagram), and conducts technical and economic analysis and evaluation of the scheme to select the best scheme.

Structural scheme design determines the machine layout, size, the structure, material and size of the main parts and components and the configuration relationship between each other, etc., and completes the overall structure design scheme of the machine.

Detailed design According to the determined structural scheme, draw assembly drawings, component drawings and parts drawings, prepare technical documents, etc.

Make prototype and test Through prototype manufacturing, test to check the correctness of the design, and carry out cost accounting, and finally through the prototype appraisal.

Improve the design and sales According to the problems exposed by the prototype test, use and identification, further modify the design, improve the design, and ensure the quality of product design.

It should be pointed out that the actual mechanical design work is often not a simple serial work, after the completion of a phased work, it is necessary to carry out an evaluation, according to the evaluation results, there is a continuous cycle feedback process.

Do mechanical design, mold design, product design.

Mechanical design is an important part of mechanical engineering, the first step of mechanical production, and the most important factor in determining mechanical performance. The goal of mechanical design is to design the best machine under various limited conditions (such as materials, processing capacity, theoretical knowledge and calculation methods, etc.), that is, to make an optimal design.

Optimal design requires a combination of many requirements, generally including: best working performance, lowest manufacturing costs, minimum size and weight, maximum reliability in use, lowest consumption and least environmental pollution. These requirements are often contradictory, and their relative importance varies depending on the type and use of the machinery.

The task of the designer is to weigh the importance according to the specific situation, and take into account the overall consideration, so that the designed machinery has the best comprehensive technical and economic effect. In the past, design optimization relied primarily on the designer's knowledge, experience, and foresight. With the development of new disciplines such as basic theory of mechanical engineering, value engineering and system analysis, the accumulation of technical and economic data for manufacturing and use, and the popularization and application of computers, optimization gradually abandons subjective judgment and relies on scientific calculation.

When you are an engineer and design mechanical products, there are many mechanical products, such as automobiles, bicycles, harvesters, packaging machines, robots, etc., and even toys will involve mechanical structures, such as wind-ups, little monkeys who will flip their own heels.

Mechanical design, as the name suggests, is the design of machinery;Mechanical design is the design of a machine or mechanism to do a certain thing or part of a certain thing. There are so many things to say about designing cars to transport or pull goods, cranes to lift heavy loads, robots to serve us, and so on.

It's not that easy to really learn design.

Knowledge. Continuously learn the basic knowledge of mechanical design, and be able to draw inferences from one example;

Understand and be familiar with the parts processing technology, so that the designed products can be processed, and the simpler the process, the better;

Familiar with the assembly process, the design of things can not only be processed, but also assembled, and it is also important to figure out the assembly tolerances.

Poor experience. After proficient in applying the basic knowledge, you can start the design slowly and accumulate design experience.

Ask the designer for advice, find the problem, analyze the problem, and find your own answer.

Ask the process personnel for process knowledge, observe the processing process of parts without skin, and understand the process knowledge.

I am also a mechanical designer, and I think that the mechanical design scheme mainly includes the following aspects of information:

1. Rough drawing, so that customers can know the basic internal structure of the machine you designed

2. The materials of important grinding parts, and provide the materials of important parts that customers want to know

3. The approximate calculation of important parts, all the calculations related to the main performance, structural strength and safety should be given at the same time

4. If the machinery you design has interface problems with customers or other important units (including electrical interfaces), please give the interface size drawing;

5. The key size, which involves the key size of mechanical properties, should be given at the same time;

6. Provide customers with the national standards and reference programs you use.

I believe that a good mechanical solution should include the following six aspects. The first of these is best expressed in CAD, not necessarily 3D CAD and 3D animation. As long as it can be clearly expressed on the drawing, it is fine.