25
Design of
Forming Tools
UNIT 7 DESIGN OF FORMING TOOLS
Structure
7.1 Introduction
Objectives
7.2 Purpose of Forming Tools
7.3 Various Types of Forming Tools
7.3.1 Flat Form Tool
7.3.2 Circular Form Tool
7.4 Graphical Method of Determining Profile of Form Tool
7.4.1 Profile of Flat Form Tool
7.4.2 Profile of Circular Form Tool
7.5 Summary
7.6 Key Words
7.1 INTRODUCTION
Forming a tool or die or designing a forming tool is one of vital factor of tool
engineering, which must be known by every design engineer. Forming a tool means
giving a particular and useful shape with required dimensions to the part. The part
formed by forming operation is generally takes the shape of the dir or punch. In the
forming operation, the metal flow is not uniform and localised to some extent, depending
upon the shape of the Workpiece. Bending along a large radius in a straight line may also
be referred to as a forming operation. It is difficult to distinguish between a bending and
forming tools. Forming operation may be simple and extremely complicated.
Objectives
After studying this unit, you should be able to
• know various types of forming tools, and
• understand design of forming tools
7.2 PURPOSE OF FORMING TOOLS
A form tool is defined as a cutting tool having one or more cutting edges with well
defined profile or contour that is reproduced as the desired form on the workpiece
surface. Form tools utilized for turning applications are classified according to type of
cross section. The classification is shown in the tree diagram of Figure 7.1.
Error!
(According to cross-section)
Form Tools
Flat Circular End Form
(According to setting of cutting
edge)
(According to orientation of
tool axis)
Radial
Tangential Parallel Angular
Figure 7.1 : Classification of Form Tool