1, different definitions
Mechanical drawing: Mechanical drawing is a subject that accurately expresses the structural shape, size, working principle and technical requirements of machinery with drawings. Patterns consist of figures, symbols, characters and numbers.
It is a technical document that expresses design intent, manufacturing requirements and exchanges experience, and is usually called the language of engineering. In addition, mechanical drawing is also one of the basic compulsory courses for mechanical and related majors in most colleges and universities.
Engineering drawing: Engineering drawing is an important process in engineering technology. It is an important basic compulsory course in higher engineering courses. This course is a subject to study the drawing and reading of engineering drawings. It studies how to use projection method (see descriptive geometry) to solve space geometry problems and express space objects on the plane.
2. Different content systems
Mechanical drawing: In order to make people have a consistent understanding of the format, characters, lines, graphic simplification and symbol meaning involved in drawing, unified norms have been gradually formulated and developed into mechanical drawing standards. Countries generally have their own national standards, and there are also standards formulated by the International Organization for Standardization in the world.
China's national standard for mechanical drawing was formulated in 1959 and revised twice in 1974 and 1984. The items specified in the mechanical drawing standard include: drawing width and format, scale, font and drawing lines, etc.
Engineering drawing: Engineering drawing is a professional basic subject with a history of more than 200 years. It is based on the projection theory of descriptive geometry, with rulers, compasses and drawing boards as tools and blackboards, wooden models and wall charts as media. Mechanical engineering drawing is an introductory course that embodies the characteristics of engineering, and it is also one of the professional basic courses that engineering students must study.
As the foundation of creative thinking, it plays an important role in cultivating students' spatial imagination and conception ability and promoting the process of industrialization. Engineering drawing is an indispensable technical document in production and a universal "engineering technical language". Drawing and reading engineering drawings correctly is an essential basic quality for an engineering technician.
3. Different requirements
Mechanical drawing: Drawing format, and Class A standard drawings are preferred for mechanical drawing: Class A mainly includes A0 (1189mm× 841mm), A 1(84 1mm×594mm) and A2 (594).
When necessary, it is also allowed to select the specified type B and type C of the extension width, and the size of the extension width is obtained by increasing the short side of the basic width by an integer multiple.
Frame format, on the drawing, the frame line must be drawn with thick solid lines, and its format can be divided into two types: non-wrapped and wrapped, but the pattern of the same product can only be in one format.
Title bar defines the content, format and size of the title bar. The text direction of the title bar should be the direction of looking at the picture. The outline of the title bar is a thick solid line, and the inside is a thin solid line. The right and bottom lines of the title bar should coincide with the border lines.
Proportion is the ratio of the linear dimensions of the corresponding elements in a figure and an object. When the pattern needs to be drawn in proportion, the appropriate proportion should be selected from the specified series. In order to get the realism of the physical dimensions from the drawings, the original scale (1: 1) should be adopted as far as possible. When the parts are too large or too small, you can choose the reduction or enlargement ratio specified in the table, but the actual size must be indicated when dimensioning.
Generally speaking, all views of the same part should be drawn at the same scale and filled in the title bar. When a view needs to adopt a different scale, the scale can be marked below or to the right of the view name.
Font, the font written in the design must be neat, clear, evenly spaced and neatly arranged. The nominal size series of font height (expressed by H) are 1.8, 2.5, 3.5, 5,7, 10,120mm. Font height represents the number of fonts. 1. Chinese characters should be written in imitation of Song Dynasty, using simplified characters officially promulgated by the state.
The height of Chinese characters should not be less than 3.5 mm, and the width is generally 2/3 of the height. The writing essentials of long imitation song style are: horizontal and vertical, paying attention to ups and downs, symmetrical structure and filling in squares. There are two kinds of numbers and letters: straight and italics. Generally, italics are used, and the prefix of italics is inclined to the right, making an angle of about 75 with the horizontal line. Only one font is allowed on the same pattern.
Engineering drawing: integrating the contents of computer drawing into engineering drawing. Through the concept of modeling, strengthen the expression of three-dimensional graphics and shape training. Broaden the scope of traditional engineering drawing course. Pay attention to practical links.
What is the difference between mechanical drawing and engineering drawing?
Difference:
1. engineering graphics is a subject that takes graphics as the research object and expresses design thinking with graphics. Engineering drawing includes mechanical drawing.
2. Engineering graphics can be divided into mechanical and non-mechanical categories, including descriptive geometry and drawing.
3. Mechanical drawing is a kind of engineering drawing, including descriptive geometry and mechanical drawing.
Three graduates want to major in mechanical engineering, but they have learned nothing. Now they want to teach themselves some drawing CAD and theoretical knowledge. I don't know where to start.
Hello, classmate, your determination is worth learning.
I am a manufacturing process engineer in the mechanical industry, and I have the following suggestions for your reference:
Reading Mechanical Drawing (Tsinghua-Classic Edition) is mainly about learning drawing standards and rules.
More mechanical drawing forums and so on. There are some experiences written by big coffee, which are worth learning.
I majored in mechanical drawing and cad, and my employment direction is
Both mechanical design and mechanical drawing are competent. However, you should have some mechanical knowledge in this respect, which needs to be strengthened in peacetime. Architectural drawing can also be considered.
Which major does Wu want to study mechanical drawing?
Mechanical painting
It is the basic subject of many disciplines, such as mechanical manufacturing, boiler design, steam turbine design,
aircraft manufacturing
-Wait, some people say it's engineering language. No matter what you want to do, you must draw it first, otherwise who can make it clear and understand it? What is the basis for doing right? This is a painting.
Let's just say, make a new gas car. How do you explain your idea to the person who did it?
So simply learning from him is just like learning math. You are not studying math, you are not teaching. This knowledge can only be an accessory in life and work.
What major does Lu's mechanical drawing belong to?
mechanical engineering
Mechanical engineering and automation
Industrial design (and hand-drawn 3D drawings)
At first, I studied basic painting.
Mechanical drawing course
That is, hand-drawn with drawing tools.
I will learn two-dimensional autocad and caxa in the future.
3 d solidworks
UG et al
What major does mechanical drawing belong to?
Mechanical drawing is a very basic thing, and many majors learn it. The whole mechanical department will learn this course, and so will many other departments. If you really want to learn mechanical drawing well, I suggest you apply for the major of mold design and manufacturing in the Department of Mechanical Engineering.
Which major (junior college) does mechanical drawing belong to?
Mechanical drawing is a basic course for mechanical engineering majors, which is used by universities, junior colleges, technical secondary schools, technical schools and mechanical workers. Mechanical drawing itself is not a professional course, but a technical "language" for mechanical post communication.
What is the major of mechanical drawing and design in "Nine" CAD?
CAD is just a tool to replace the manual paper-and-pencil ruler, and it is the basic skill of engineers, because you can't draw without CAD. CAD itself can't design, let alone be professional.