机械制造工艺学课件12-13

Example
A
A-A
A
Installation
Installation: in a sequence if the work is required to put into position and clamp several times, the part of sequence done in one positioning and clamping is called an installation.(确 定)
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机械加工工艺过程的基本概念
机械制造工艺：各种机械的制造方法和过程的 机械制造工艺： 总和。 总和。 机械加工工艺过程：在机械加工车间中， 机械加工工艺过程：在机械加工车间中，直接 改变生产对象的形状、尺寸、 改变生产对象的形状、尺寸、相对位置与性质 使其成为成品或半成品的过程。 等，使其成为成品或半成品的过程。 机械加工工艺规程 规定产品或零部件制造工 艺过程和操作方法等的工艺文件。 艺过程和操作方法等的工艺文件。
Content
Chapter One Production procedure and basic nomenclature Chapter Two Machining Accuracy and Its Control Chapter Three Machined Surface Quality and Control Chapter Four Design of Process Planning Chapter Five Design of Assembly Processing Chapter Six Design of Fixtures of Machine Tools
Example
Headstock Drive plate Dog Center Tailstock
Center
Workpiece
Cavity for clearance
Taper hole to accept center
60°
Station
Station: In an installation, by using the indexing or moving device the work is changed its position relatively to the cutting tool. All the tasks done for the work in one machining position in an installation is termed as the station.(确定)
Example
core drilling drilling reaming
installing and unloading
Step and pass
Step：In one station if the surface cut, ： cutting tool, velocity, and feed remain unchanged, these working contents are thought of as the step.(加工表面、刀具、 切削速度、进给量任一改变均为另一工步） Pass: When the surface of the work is cut for any one time ,such task carried out is named as the pass. (刀具在加工表面的每一次切削）
Processing system:
A system that contains the work to be machined, fixture that holds the work in the proper position, cutting tool that machines the work directly, and machine tool that gives the power and provide the movements to accomplish the processing. In recent years the gauging and measuring is added to the system.
Fundamentals of Manufacturing Technology 制造技术基础
顾立志 华侨大学机电及自动化学院
Introduction
What is Manufacturing Technology It is defined that the basic subjects are mechanical products, including parts, components and machines, emphasizing the operating processes and methods involved for machining and assembly. Significance of Mechanical Manufacturing A Machine Industry and Its Significance B Manufacturing Technology United States, West Europe, Japan, China C Nation and defence power Property and Subject of the Course It is an very important fundamental course in Specialty of Mechanical Engineering；Examined compulsory course .
Features
A) Diversity of the contents, Essential of concepts, Degree of difficulty B) Largely based on practice——perceptual knowledge and experience in workshop C) With engineering characteristics——solutions are not necessarily unique D) Prerequisite /precondition Knowledge of Metal technology, Workshop practice, Interchangeability and technical gauging, metal cutting principles and cutting tool designs, Machine tools, etc.
Teaching methods and learning requirements
Teaching methods
A) Trial on the course with bilingual languages （English-Chinese) B) Detailed and brief lecturing C) Keep balance between the theory and practice D) Remain the equilibrium weight of the daily study and examination
Assessment of the course
It will be so evaluated as your final scores of the course that the centigrade is utilized with three aspects: a) points on the answer sheet of the examination, b) daily behavior, covering attendance, assignments, display during the lectures, c) points for experiments. Each of these three aspects has the weight of 70%,20% and 10%,respectively with the limitation of at least 40% of the contents are supposed to work out in English. For the encouragement of practicing English，compensation is so set that up to 8% ， extra points will be obtained if the rest of the contents have been done in English properly, penalty points of at the outside 5% will go off, however keeping the full points of 100. (本课程的考核采用百分制，考核内容包括三部分：卷面成绩、平时成 绩（出勤、作业、课堂表现）和实验成绩，分别以70%、20%和10% 加权计入总成绩；按量计，至少应有40%的内容用英文完成，如不能 用英文完成，视情有不超过5%的减分；其余部分如用英文完成可获 上限为8%的加分，加分结果不能超过满分成绩。)
Contents and Features of the Course
Main Contents
A) Preface:development of the subject, procedure of the production,pattern and location of the component in machining B) Machining accuracy and controlling C) Machined surface quality and stipulation D) Planning of mechanical processes E) Design of assembly process procedures E) Design principles and methods of jigs/fixtures for machine tools F)Trends & developments in manufacturing technology