Brief introduction of mold workers' content

This book is one of the training books for vocational skill appraisal. The book is divided into nine chapters, mainly including introduction, tools and measuring tools commonly used in die manufacturing, stamping equipment, stamping technology, structure of blanking die, processing of blanking die parts, assembly and debugging of blanking die, maintenance and management of die, bending die, drawing die, cold extrusion die and cavity die. At the end of the book, some national standards of commonly used molds are extracted. This book is easy to understand, focusing on the relevant knowledge and operating skills that intermediate mold assemblers should master. In the process of writing, the typical structure of the mold, the processing method of the main parts, installation, debugging and maintenance are mainly introduced. Each chapter is accompanied by a study summary and exercises. order

Mould is the main process equipment widely used in modern industrial production. Using molds to produce mechanical parts has the advantages of high efficiency, low cost, saving raw materials and good interchangeability of parts, which is an important means and development direction of contemporary industrial production. Such as automobile manufacturing, electronics industry, daily necessities processing and many other fields, largely depends on the development level of the mold industry. With the gradual deepening of reform and opening up, foreign investors are very optimistic about the mold market in China. China mold industry has a huge development space and is gradually becoming one of the basic industries of the national economy.

Therefore, one of the fundamental tasks to revitalize the mold industry in China is to strengthen personnel training and improve the quality of talents in the mold industry. Today, with the transformation of higher education from elite education to popularization, colleges and universities in China have trained a batch of high-level talents in mold specialty. However, with the rapid development of mold industry, it is far from meeting the needs of development, especially the demand for middle and senior mold manufacturing technicians is increasing. In order to meet this development requirement, the first task is to cultivate talents at this level. This book is written for this purpose and can be used as training for intermediate mold workers.

This book is highly targeted and pays attention to practicality and practicality. It introduces the basic theory, common tools, measuring tools and operating skills that middle-level mold workers should master, especially lists a large number of typical structures and uses of various molds to expand their knowledge. Each chapter has a study summary and some exercises. In terms of content arrangement, various treatment methods are introduced around the key points of knowledge and combined with the actual situation of the factory. The greatest feature of this book is the combination of theory and practice.

The content of this book is concise, which can be used as a training textbook for intermediate mold workers and mold assemblers, as well as an elective textbook for vocational high schools and higher vocational colleges and a training textbook for some personnel in the process of enterprise restructuring. The book was mainly written by Ma Chaoxing of Jiangsu University, a senior engineer of Zhenjiang Forestry Machinery Factory of the Ministry of Forestry and Feng of Jiangsu University, with Professor Ge Xiaolan of Jiangsu University as the presiding judge.

This book is divided into nine chapters. It mainly includes: introduction, common industries and measuring tools for die manufacturing, stamping equipment, stamping technology, stamping die structure, stamping die parts processing, stamping die assembly and debugging, die maintenance and management, bending die, drawing die, cold extrusion die and cavity die. At the end of the book, some national standards of commonly used molds are extracted.

In the process of writing this book, we strive to be easy to understand and pay attention to the learning object-intermediate die fitter. In the process of writing, we combine the practical operation and editing experience, and introduce them in appropriate chapters. This book focuses on the punching die, focusing on the typical structure of the die, the processing methods of the main parts, installation, debugging and maintenance. This book also briefly introduces some basic calculation methods commonly used in mold manufacturing and maintenance.

The first to fourth and sixth chapters of this book were written by Ma Chaoxing, the fifth chapter was written by Feng, and the seventh to ninth chapters were written. This book was compiled by Ma Chaoxing. In the process of writing, I received the guidance and support from Professor Ge Xiaolan of Jiangsu University, and I would like to express my sincere thanks to the comrades who supported the writing of this book. Due to the limited level of editors, there are inevitably some shortcomings and mistakes in the book. I sincerely hope readers will criticize and correct me. And I hope that through teaching practice, it will be revised edition by edition to make it perfect day by day.

compilers

Introduction to the first chapter in March 2004 1

Section 1 Present Situation and Development of Mould Technology 1

I introduction 1

Second, the development trend of mold technology 2

Section 2 Mould 3

Learning summary 8

Exercise 8

Chapter II Common Tools and Measuring Tools for Mould Manufacturing 9

The first section die fitter commonly used marking tools 9

I. scribing board 9

Two. V-block 10

Three. Right angle plate 1 1

IV. Jack 1 1

Verb (abbreviation of verb) marks needle 12

Intransitive verbs crossed dial 13

Seven. Height cursor 14

VIII. Planning (also called sub-planning) 14

Nine. Example of workpiece marking 15

Section 2 Common Measuring Tools for Mould Assemblers 19

I. Box level 19

Secondly, the optical composite level 20

Third, sine gauge 2 1

Four. Model 22

Learning summary 23

Exercise 24

Chapter III Stamping Equipment 25

The first section working principle and structure of crank press 25

I. Working Principle of Crank Press 25

Second, the composition of crank press 25

Iii. Main components and functions of the press 27

Main technical parameters and model 34 of crank press in the second quarter

I. Main technical parameters 34

Second, the crank press model 34

Three, the types of crank press 35

Four, publishing house selection principle 42 pages

Section 3 Friction Press 43

I. Working Principle of Friction Press 43

Second, the types of friction press 43

Learning summary 44

Exercise 45

The fourth chapter stamping process 46

The first section basic concepts of stamping 46

I. Stamping 46

Second, the advantages of stamping 46

III. Basic process of stamping 46

In the second quarter blanking process analysis 49

I. Types of blanking process 49

Second, the blanking process 50.

Iii. Quality Analysis of Stamping Parts 5 1

Section III Blanking Die Gap 53

I. Reasonable headroom 53

Second, the selection principle of reasonable clearance 55

The fourth quarter punch and die cutting edge size and tolerance 55

A, the principle of blanking die cutting edge size calculation 55

Two. Calculation method of cutting edge size of 56 stamping die

Section 5 Punching Force 62

A, the impact force calculation formula 62

Second, the measures to reduce the blanking force 63

Three. Unloading force, thrust and thrust 65

Section 6 Layout and Grinding of Workpieces 67

I. Layout 67

Second, the edge 70

Three. Calculate the width of the strip and the distance between the guide rails 7 1

Learning summary 72

Exercise 73

The fifth chapter blanking die structure 74

Structure and composition of the first die 74

I. Composition of Die 74

Second, the typical structure of blanking die 76

Main structural parts of blanking die 82 in the second section

I. Working part 82

Second, the positioning member 90

Thirdly, the discharging device 95

The main components and functions of the template in the third quarter 97

I. Mold base 97

Ii. Mould connectors and their functions 102

Third, the fastener is 104.

Learning summary 104

Exercise 104

Chapter VI Machining of Die Parts 106

Section 1 Mould Frame Manufacturing 106

I. Requirements and processing technology of guide posts and guide sleeves 106

Ii. Requirements and processing technology of upper and lower die holders 1 10

Section 2 Machining of Punch and Die of Punching Die 1 14

I. Technical Requirements and Material Selection Principles of Punch and Die of Punching Die 1 14

II. Punching die punching 1 15

Three. Brief introduction and correct use of 122 optical curve grinder

Four. Machining of blanking die 123 female die

In the third section, the punching process of punch and die of blanking die is 129.

I. Preparation before Stamping 129

II. Common Stamping Equipment 129

Three. Stamping processing of punch 130

Four. Die stamping 130

V. Processing example 13 1

Section 4 EDM 134

I. Principles and characteristics of EDM 134

Second, the application of EDM in mold manufacturing 136

Iii. Methods to Ensure the Fit Clearance of Punch and Recess Die 137

Four. Electrode design 138

Section 5 WEDM 146

I. Principles and characteristics of WEDM 146

Second, the choice of process parameters 149

Iii. Workpiece Clamping and Adjustment 150

Section 6 CNC milling 155

A, the characteristics of CNC milling 155

Second, the CNC milling machine model 156

Section 7 Other Special Handling 157

I ultrasonic machining 157

Second, electroforming 159

III. Electrochemical Machining 160

Learning summary 162

Exercise 162

Chapter VII Assembly and Debugging of Stamping Die 163

Section 1 Assembly Technology 163

I. Technical Requirements for Stamping Die Assembly 163

Ii. Preparation before assembly 164

Three. Punching Die 165 Assembly Method of Main Parts

Four. Assembly method and key points of blanking die 17 1

Section 2 Debugging of Stamping Die 173

I. Purpose of mold debugging 173

II. Contents and Requirements of Mold Debugging 173

Iii. Defects and Adjustment of Mould Test 174

Learning summary 176

Exercise 176

Chapter VIII Mold Maintenance and Management 177

Section 1 Die Repair 177

First, the characteristics of punching die repair 177

Second, the reason analysis and measures for the repair of blanking die 178

Section 2 Stamping Die Management 184

I. Die Management 184

Two. Measures for the Administration of Mould Storage and Distribution 185

III. Mould storage method 186

IV. Management of Die Scrapping 186

Learning summary 187

Review thinking questions 187

Chapter 9 Bending Die, Drawing Die, Cold Extrusion Die and Concave Die 188

Section 1 Bending Technology and Bending Die 188

I. Bending deformation process and its characteristics 188

Second, the minimum bending radius is 189.

Third, the springback of bending parts 19 1

Four. Calculation of bending force 195

Verb (abbreviation of verb): Structural Craftsmanship of Bending Parts 197

VI. Structural Design of Bending Die 199

Seven. Design of Working Part of Bending Die 200

VIII. Typical Structure of Bending Die 204

Section II Drawing Process and Drawing Die 207

I. Design of Working Part of Drawing Die 208

Second, the wrinkling of deep-drawn parts and its preventive measures 2 13

Three. Typical structure of drawing die 2 15

Section 3 Cold Extrusion Technology and Cold Extrusion Die 2 17

I. Classification of Cold Extrusion 2 18

Second, the characteristics of cold extrusion 2 19

III. Typical Structure of Cold Extrusion Die 2 19

The fourth section introduces the cavity mold 220.

I. Forging die 220

Second, the die casting die 22 1

Third, the plastic mold 222

Learning summary 232

Review and think about questions 232

Appendix Stamping Die Frame 233

Reference 248