3d Printing
UNIT 4 JIGS AND FIXTURES
Structure
4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 Introduction
Objectives
Jigs and Fixtures
Purpose and Advantages of Jigs and Fixtures Important Considerations while Designing Jigs and Fixtures Meaning of Location Principles of Locations Different Methods Used for Locations Clamping Different Types of Clamps Jigs
4.10 Different Types of Jigs 4.11 Fixtures 4.12 Summary 4.13 Answers to SAQs
4.1 INTRODUCTION
The jigs and fixtures are the economical ways to produce a component in mass. So jigs and fixtures are used and serve as one of the most important facility of mass production system. These are special work holding and tool guiding device. Quality of the performance of a process largely influenced by the quality of jigs and fixtures used for this purpose. What makes a fixture unique is that each one is built to fit a particular part or shape. The main purpose of a fixture is to locate and in the cases hold a workpiece during an operation. A jig differs from a fixture in the sense that it guides the tool to its correct position or towards its correct movement during an operation in addition to locating and supporting the workpiece. An example of jig is when a key is duplicated, the original key is used as base for the path reader which guides the movement of tool to make its duplicate key. The path reader of a CWC machine here works as a jig and the original is called template. Sometimes the template and jig both are the name of same part of a manufacturing system.
Objectives
After studying this unit, you should be able to understand introduction of jigs and fixtures, purpose and advantages of jigs and fixtures, important considerations while designing jigs and fixtures, know the meaning and principles of location, describe the different types of locations, explain the clamping and its different type, the requirements of a good clamping device, know the different types of clamps, 47
Manufacturing
Structure
4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 Introduction
Objectives
Jigs and Fixtures
Purpose and Advantages of Jigs and Fixtures Important Considerations while Designing Jigs and Fixtures Meaning of Location Principles of Locations Different Methods Used for Locations Clamping Different Types of Clamps Jigs
4.10 Different Types of Jigs 4.11 Fixtures 4.12 Summary 4.13 Answers to SAQs
4.1 INTRODUCTION
The jigs and fixtures are the economical ways to produce a component in mass. So jigs and fixtures are used and serve as one of the most important facility of mass production system. These are special work holding and tool guiding device. Quality of the performance of a process largely influenced by the quality of jigs and fixtures used for this purpose. What makes a fixture unique is that each one is built to fit a particular part or shape. The main purpose of a fixture is to locate and in the cases hold a workpiece during an operation. A jig differs from a fixture in the sense that it guides the tool to its correct position or towards its correct movement during an operation in addition to locating and supporting the workpiece. An example of jig is when a key is duplicated, the original key is used as base for the path reader which guides the movement of tool to make its duplicate key. The path reader of a CWC machine here works as a jig and the original is called template. Sometimes the template and jig both are the name of same part of a manufacturing system.
Objectives
After studying this unit, you should be able to understand introduction of jigs and fixtures, purpose and advantages of jigs and fixtures, important considerations while designing jigs and fixtures, know the meaning and principles of location, describe the different types of locations, explain the clamping and its different type, the requirements of a good clamping device, know the different types of clamps, 47
Manufacturing