Fundamentals of mechanical manufacturing process and mechanical design

The minimum processing allowance of each process should ensure that the shape and position errors and surface layer defects generated by the previous process are removed by the adjacent subsequent processes. The methods for determining machining allowance generally include 1) empirical estimation method, 2) table lookup method, and 3) analysis calculation method. Hope it helps.

Determine the process size tolerance according to the "body entry principle" marking: Process size tolerance according to the "body entry principle" marking: for the included size (solid length, the included size (shaft diameter, solid length, width, height) its maximum limit size is the basic size, and the upper deviation is zero.

The maximum limit size is the basic size, and the upper deviation is zero. 0 TDD for the inclusion size (for the inclusion size (hole diameter, groove width), the minimum limit ruler groove width), the minimum limit ruler), the inch is the basic size, and the lower deviation is zero. The size is the basic size, and the lower deviation is zero.

tdd02.The influencing factors of the process allowance are (1) the dimensional tolerance of the previous process ta) 2) the surface roughness of the previous process (the surface contour is the largest) the surface roughness of the previous process ry height) and the depth of the surface defect layer ha height) and the depth of the surface defect layer (3) the spatial error left by the previous process a) the spatial error left by the previous process e (4) the clamping error of the process b) the clamping error of the current process

The foundation of mechanical design includes two parts: mechanical principle and mechanical design, the principle part is mainly examined: the mechanism has certain motion conditions, and the degree of freedom is calculated; Basic knowledge of plane four-bar mechanism, plane four-bar mechanism design;

The basic parameters and geometric dimensions of involute standard gears, involute spur cylindrical gear meshing transmission, helical cylindrical gear transmission;

Rotating gear train transmission ratio, composite gear train transmission ratio, design part: material fatigue characteristics, strength calculation;

Threaded connection, bolt group connection design, bolt connection strength calculation;

Belt drive, chain drive design, analysis of work type (small question);

Gear drive worm drive force analysis and draw force diagram (big topic);

Calculation of plain bearing design (calculation according to p, pv, [v] limits), selection of rolling bearing size, calculation of load carrying capacity. It may not be the same from school to school, but these are the main knowledge.

The main disciplines of mechanical manufacturing technology: mechanics and mechanical engineering. Main courses: Engineering Mechanics, Fundamentals of Mechanical Design, Electrical and Electronic Technology, Principles and Applications of Microcomputers, Materials for Mechanical Engineering, Fundamentals of Manufacturing Technology.

Key Technologies and Capabilities:

1. Systematically master the basic knowledge of a wide range of technical theories in the professional field, mainly including mechanics, mechanical spring failure, electrical and electronic technology, mechanical engineering materials, mechanical design engineering, mechanical manufacturing field forest stove foundation, automation foundation, market economy and enterprise management, etc.; 2. Have the basic skills of drawing, calculation, experiment, testing, literature retrieval and basic process operation necessary for this major; 3. Have the necessary professional knowledge in a certain professional direction in the professional field, and understand its scientific frontier and development.

1. The selection of cutting amount should consider the cutting speed V, feed speed F, and cutting depth AP, and the roughing should be smaller V, larger depth of cut and feed rate, and the opposite for finishing.

2. Scheme 1, because non-ferrous metals are brittle materials industry, considering the processing accuracy should be selected scheme 1.

3. It should meet the requirements of use, ensure that the structure is reasonable, consider the practicability and convenience of the part design, and the processing technology characteristics should be reasonable and easy to process.

4、c 5、b 6、c

1.Ensure that the remaining amount of the next process is fine, and the margin of the next process is reduced as much as possibleOption 1, processing cost and processing efficiency.

3.Play for yourself.

Machinery technology is a science that studies the scientific theory and practice of the mechanical manufacturing process, explores and solves the practical problems encountered in the process, and reveals the general laws.

The process of mechanical manufacturing generally includes the machining process of parts and the assembly process of the machine.

At present, mechanical manufacturing technology mainly includes three parts: machining technology (cold working), mechanical assembly technology and machine tool fixture design.

The details include the formulation of machining process regulations, the design principle of machine tool fixtures, machining accuracy, machining surface quality, typical parts processing technology, machine assembly process basis, mechanical design process basis, modern manufacturing technology and CNC machining technology.

Introduction to college majors: mechanical design, manufacturing and automation.

Discipline: Engineering.

Category: Mechanical.

Professional name: mechanical design and manufacturing and automation.

Business training objectives: This major cultivates senior engineering and technical talents who have the basic knowledge and application ability of mechanical design and manufacturing, and can be engaged in design and manufacturing, scientific and technological development, applied research, operation management and operation and sales in the field of mechanical manufacturing in the front line of industrial production.

Business training requirements: Students in this major mainly learn the basic theory of mechanical design and manufacturing, learn the basic knowledge of microelectronic technology, computer technology and information processing technology, receive the basic training of modern mechanical engineers, and have the basic ability to design, manufacture and equipment control of mechanical products, and organize and manage production.

Graduates are expected to acquire knowledge and competencies in the following areas:

1. Have a solid foundation in natural sciences, humanities, arts and social sciences, and the ability to correctly use the Chinese language and writing;

2. Systematically master the basic knowledge of a wide range of technical theories in the professional field, mainly including mechanics, mechanics, electrical and electronic technology, mechanical engineering materials, mechanical design engineering, mechanical manufacturing basics, automation basics, market economy and enterprise management, etc.;

3. Have the basic skills of drawing, calculation, experiment, testing, literature retrieval and basic process operation necessary for this major;

4. Have the necessary professional knowledge in a certain professional direction in the professional field, and understand its scientific frontiers and development trends;

5. Have preliminary scientific research, scientific and technological development, organization and management capabilities;

6. Strong self-learning ability and sense of innovation.

Main disciplines: mechanics, mechanical engineering.

Main courses: Engineering Mechanics, Fundamentals of Mechanical Design, Electrical and Electronic Technology, Principles and Applications of Microcomputers, Materials for Mechanical Engineering, Fundamentals of Manufacturing Technology.

The main practical teaching links: including military training, metalworking, electrician, electronic practice, understanding practice, production practice, social practice, curriculum design, graduation project (**), etc., should generally be arranged for more than 40 weeks.

Duration: 4 years.

Degree awarded: Bachelor of Engineering.

The traditional ones are casting, forging, turning, milling, planing, grinding, pliers, stamping, welding, precision wire cutting, EDM, laser, the most advanced cold beating, waterjet and so on.

In fact, the development of various machinery manufacturing technology is changing with each passing day, and there are constantly new technologies changing our lives. As long as you're interested, you can too.