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Mechanical parts surveying and mapping Mechanical parts surveying and mapping
In the form of "project-oriented and task-driven", this book is guided by the mapping and production inspection process of typical parts (bushings, covers, forks, boxes, standard parts and common parts). The project consists of several parts: task introduction, related knowledge, task implementation and knowledge expansion. Through study, readers can not only read and draw typical part drawings and assembly drawings, but also master the selection and use methods of general measuring tools and special measuring tools, as well as the drawing methods of relevant national drawing standards and regulations, which also creates conditions for obtaining the national professional qualification certificates of senior draftsmen and technicians.

This book can be used as a teaching material for students in mechanical vocational colleges and secondary vocational colleges, and can also be used as a teaching material for enterprise technicians or job skills training. Surveying and Mapping of Mechanical Parts is a new course based on the working process systematization and fully embodies the characteristics of higher vocational education. Based on the deep cooperation with enterprises, the work-study combination course is jointly developed with enterprises. Its main purpose is to cultivate students' professional awareness, professional ability and job skills.

This book reconstructs the contents of mechanical drawing, interchangeability and measurement technology in the discipline system according to the post task analysis and knowledge and skill requirements of the mechanical manufacturing industry, focusing on the ability training, and embodies the practicality, openness and professionalism of the curriculum system in higher vocational colleges. This textbook has the following characteristics in content organization and compilation:

1. Organize the teaching content in a project-oriented and task-driven way. The typical product reducer is selected as the carrier, and seven learning projects are formed according to the cognitive law and parts grouping and classification. Students can learn and master relevant knowledge and skills by completing design tasks.

2. Take the working process as the main line and pay attention to the cultivation of professional ability. Taking the typical product reducer of an enterprise as the carrier, the contents of teaching materials are arranged according to the steps of reading drawings, drawing and product testing in practical work, so as to create a professional atmosphere and gradually cultivate students' professional ability.

3. Focusing on the application of mechanical drawing and measurement technology, the teaching material framework is constructed. The ability to draw and read mechanical drawings is the basis of product design, manufacture, installation, maintenance and use. Checking and measuring related items against mechanical drawings is an important part of product manufacturing process and the main means to ensure product quality. It can be seen that mechanical drawing and measurement technology are inseparable, and this book organically integrates these two parts of knowledge to form a main framework.

4. Have a relatively complete workflow and corresponding theoretical knowledge. This book contains seven projects, each of which consists of four parts: task introduction, related knowledge, task implementation and knowledge expansion. Students acquire relevant theoretical knowledge by completing each task, and the depth of knowledge and skills is gradually increasing, which conforms to the cognitive law and is also convenient for self-study.

Editor's Title: Surveying and Mapping of Mechanical Parts Author: Chen Guifang Editor-in-Chief

Press: Machinery Industry Press

Publication time: 20 10 August 1 Edition 1 Printing.

ISBN:ISBN 978-7- 1 1 1-30503-3

Pricing: 39.00 Yuan Foreword

Introduction 1

Introduction to Surveying and Mapping 1

II. Introduction to Measurement Technology 4

Three. Basic concept of interchangeability 5

Four. Introduction to mechanical drawing 6

Project 1 Disassembly and Assembly of Reducer 7

Task 1 Disassembling and assembling reducer 7

I. Task Import 7

Second, the relevant knowledge 7

(A) the basic knowledge of reducer 7

(2) Disassembly and assembly of reducer 9

Three. Task implementation 14

Fourth, expand knowledge: gear oil pump 15

Task 2: Understand common measuring tools 16.

I. Task Import 16

Second, related knowledge 16

(1) Common measuring tools 16

(II) Technical Basis of Measurement 20

Three. Task implementation

Fourth, expand knowledge: measurement module 24

Task 3 Understanding Mechanical Drawing 26

I. Task import 26

Second, the relevant knowledge 26

(A) the basic provisions of the national standard 27

(2) Drawing tools and their use 32

(3) Geometry 34

(4) Mechanical Drawing 38

Three. Implementation of tasks

Four. Extended knowledge: computer-aided drawing 39

(A) the emergence and development of computer graphics 40

(B) the composition of the computer drawing system

And classification 40.

(3) Introduction of AutoCAD 41

Project II Surveying and Mapping of Shaft Sleeve Parts 45

Mapping of the driven shaft of the task reducer 45

I. Task import 45

Second, the relevant knowledge 45 pages

(a) the projection principle and three views 45

(2) View 49

(3) the basic form of view 52

(4) Article 59

(5) Basic provisions for dimensioning 6 1

(6) Interchangeability and standardization 62

Three. Task execution: Drawing the driven shaft part drawing 64

structural analysis

(2) Structural Expression 65

(3) Draw a sketch 65

(4) Dimensions 66

Fourth, expand knowledge: plane cutting body and curved surface three-dimensional

Cutting 70

(1) plane cutting body 70

(2) Cutting of curved solid 72

Project III Coverage Surveying and Mapping 79

79 Mission Reducer End Cover Surveying and Mapping

I. Task import 79

Second, the relevant knowledge 80

(1) Section 80

(II) Dimensions of Parts Drawing 87

(3) Basic terms and definitions of tolerance and fit

Three. Task Implementation: Draw the reducer end cover drawing 96

Fourth, expand the scope of knowledge: measurement accuracy 99

Surveying and Mapping of Four Forks of the Project 104

Surveying and mapping task support and bifurcation 104

I. Task Import 104

Surveying and mapping of mechanical parts catalogue II. Related knowledge 105

(1) Assembly Three Views 105

(2) Draw three views of the assembly 107.

(3) Assembly size 109

(4) The reading method of assembly 1 1 1

(5) axonometric drawing 1 16

(six) the pattern representation of surface structure requirements

Method 124

Three. Task execution 130

(1) Support Parts Drawing 130

(2) Draw the axonometric drawing of fork 134.

Fourth, expand knowledge: size detection 136

Project 5 Mapping Box Parts 14 1

Mapping of box seat of task reducer 14 1

I. Task Import 14 1

Second, related knowledge 14 1

(a) Other provisions for local enlargement and painting

Simplified drawings 14 1

(2) Process structure of parts 145

(3) Geometric tolerance 149

Three. Task implementation 152

Project VI Surveying and Mapping of Common Parts and Standard Parts 163

Task 1 reducer gear mapping 163

I. Task Import 163

Second, related knowledge 163

(1) cylindrical gear 164

(2) Bevel gear 167

(3) Worm and worm wheel 170

(4) Involute cylindrical gear and its precision standard.

Application 172

Three. Task execution 189

IV. Broadening the scope of knowledge 199

(1) Requirements for using cylindrical gear transmission 199

(B) the main source of gear machining error and its

Feature 200

Task 2 Standard Parts Surveying and Mapping 20 1

I. Task Import 20 1

Second, the relevant knowledge 20 1

(1) Thread 20 1

(2) Threaded Fasteners and Their Connections 207

(3) Key and pin connection 2 12

(4) Tolerance and fit of common thread 2 16

(5) Thread detection 220

(6) Ping Jian relations of tolerance and cooperation.

(7) Detection of Keys and Splines 227

Three. Task realization 230

Fourthly, expand knowledge: rolling bearing and spring 235.

(1) Rolling bearing and its specified pattern 235

(2) Spring and its stipulated drawing method 240

Project 7 reducer mapping 243

Task 1 Read the assembly drawing of reducer 243.

I. Task import 243

Second, the relevant knowledge 243

(a) the function and content of the assembly drawing 243

(2) Expression method of assembly drawing 244

(3) Assembly drawings and serial numbers of parts and components

Detail column 245

(4) Read assembly drawing 246

Three. Implementation of tasks

(A) the general understanding of 247

(B) in-depth analysis of the working principle and assembly

Relationship 247

(3) Analysis View 249

(4) Analysis of main structural shapes and components

Use 249

(5) Size Analysis 249

(VI) Overview 249

Four. Expanding knowledge: tolerance principle 249

(a) Related terms and definitions 249

(2) Tolerance Principle 25 1

Task 2 Mapping Retarder 255

I. Task import 255

Second, the relevant knowledge 255

(1) Marking of assembly drawing 255

(II) Assembly Process Structure 256

(3) Disassemble the part drawing 258 from the assembly drawing.

(4) Surveying and mapping assembly drawing 260

Three. Implementation of tasks

(a) to understand and analyze the surveying and mapping objects-

Reducer 262

(2) Disassembly of Component 268

(3) Draw assembly schematic diagram 269

(4) Sketch the parts 269

(5) Measurement of part size 27 1

(6) Size 273

(7) Draw assembly sketch and assembly drawing 273

(eight) mark the size and technology on the assembly drawing.

Request 276

(9) Write down the part serial number and detail column 277.

(10) Drawing Parts Drawing 284

(eleven) review, sorting, binding and drawing 284

Fourth, expand knowledge: mapping milling cutter head assembly 286

(A) the analysis of the research object 286

(2) Draw assembly schematic diagram 287

(3) Remove the milling cutter head 287.

(4) Sketch the part 288

(5) Draw assembly drawing 288

Reference 294