【清华课件-机械设计基础A(3)】1-basicknowledgeofmachinedesign(new)【英文版】

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(成绩)
1.Machine Design and its process
It’s the first step of product manufacture. It attempts to go from theory into practice for the purpose of developing products and processes needed by customers.
Bicycles:
20” 28”
26”
➢Process of Machine Design
Identification Problem Mechanism Design
Feedback Modification
Technical Design

Trail Manufacture(试制), Test, Appraisement(评价), Producing
3) Finite element analysis (FEA)
It is the most prevalent computational method for solid and fluid mechanical analysis.
站立状态下足部受力计算
Please get more information from the reference[2、3].
Q
“三化”——标准化、通用化和系列 化
JB/T 7919.1-1999 Rolling bearing -Accessories—Withdrawal sleeves 滚动轴承附件 退卸衬套
Only being used in the company
3.Computers in Machine Design
4.Makings(素质) of a fine mechanical designer
1) To Be Sensitive(敏感的) 2) To Be creative(创新的) 3) To be practical(实践的) 4) To be wise(博学的) 5) To concern yourself with government
Machine Design can be: 1) Creative Design(开发性设计): New principle(原理) and New Structure
点阵击打式打印机
Principle of Laser printer
2) Adjustability (适应性) Design: Same principle and Mechanism (原理), just add some functions, then some structure should be accomodated to the change(适应这种变化).
policy(国家政策)
Percent of suffering persons(%)
1) To Be Sensitive,in order to find the consumer’s need
week
The experiment results by using different pliers(钳子)
2) Rapid prototyping
Parts from computer geometry description files can be produced in hours or even minutes. It’s helpful to visualization(可视化) design and rapid detection of design errors.
Section One
Introduction
Introduction
1.Machine Design and its process(过程) 2.Recognized Standard for Machine Design 3.Computers in Machine Design 4.Makings(素质) of the Engineers 5. Profile(概览) of “Machine Design” Course 6. How Can You Study the Course Efficiently 7. Evaluation(评价) of Your Performance
1) Computer-aided design (CAD)
It is application of computer technology to planning, performing(做) implementing(实现) the process.
Manufactures can minimize design cost, maximum efficiency, improve quality, reduce development tiຫໍສະໝຸດ Baidue, and maintain an edge in domestic(国内) and international(国际) markets.
The hole for earphone
Design of shell of cell phone providing earphone
3) Transformative(变形) Design: Same principle、mechanism and structure, just adjust some parameters(参数) to satisfy the customers.
Working Out Technical Files
Mechanism Design of Stamp Machine
2.Recognized Standard for Machine
Design
Hierarchical (等级) Standard
ISO GB
JB、YB
Unit(单位)
Bolts(螺栓), Nuts(螺母), Rolling Bearing (滚动轴承), Coupling(联轴器)
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