The mechanical major asked you to draw a picture for thousands of people. Why do people still discourage machinery?

1. What is engineering drawing? Many people, including laymen and people who are not good at learning skills, are very vague about the concept of painting, and basically stay at the level of reading words and creating meaning. Mechanical engineering drawing is not a single category, but also very complicated. For example, the assembly drawing made by the designer is very different from the part drawing disassembled by the apprentice. For example, submitting drawings for design is different from submitting drawings for production.

2. As a language, what does engineering drawing reflect? Mechanical engineering drawings, except all labels and annotations, are only used for drawing, mainly expressing spatial shape characteristics and position characteristics. These are the basis of your communication with others. In order to express these, you may need different attempts to describe them. Of course, with the development of the times and the popularity of three-dimensional maps, some people have begun to call for the abolition of two-dimensional maps and other remarks. No matter how special the welded parts are, even if they are directly connected to 3D computer-aided manufacturing, ingenious manual process arrangement is still better than automatic program generation. Some expert engineers will mark a lot of other information in the drawing operation, such as specific shape and position information, matching information, even surface quality control information, and even material control information of the matching surface. So, a painting gives you a shape and a mark. Are dimensions and information the same?

It is a joke to measure an industry by the price of a painting. The favorite standard for outsiders and some families to persuade the party to quit the party is how much a unit costs. As drawings, some can be sold at a total price on Taobao. Spend a lot of money to bring it back, some of them can't be copied! FAW has spent 40 years studying Russian diesel engine drawings, but the final result is a difference of 3 horsepower.

4. The environment in China is not good. Respect for intellectual property rights, especially tangible intellectual property rights, is very low. When you design something and take out a photo, someone starts stealing it. If you can't steal it, it will turn upside down and then you can't eat it at all. If you pass one thing to three people, it will rot!

5. It is not clear from the drawings whether the problems of China machinery industry should be rejected. Two years ago, the chief engineer of an international company found a veteran foundry in China. He brought drawings, prepared materials and even put the production technology on your desk. The old military technology saw the information provided by people and took the initiative to remove these three technologies, resulting in a yield of less than 5%.