In this article we will discuss about the classification of metal forming processes. 1. Compressive Forming Processes: In these processes the plastic state is reached by application of uni-axial or multi-axial compressive forces. Examples are forging, extrusion, rolling, indenting, coining, etc. (Fig. 2.2) shows the stress states in the material during rolling, forging, coining and extrusion processes. In the rolling [...]
There are a number of processes, described below, which may be called unconventional forming processes or high energy rate forming processes. In these processes, unconventional sources of energy such as Explosive Forming, Electro-Hydraulic Forming, Magnetic Pulse Forming, Petro-Forge and Drop Hammer and Dynapak etc., are used. The release of energy is at extremely high rate and hence the name high [...]
The following article will guide you about how to determine metal forming problems. Also learn about the three methods used for solving the metal forming problems. A simple tensile test is a case of uni-axial stress state, i.e. say σ11 ≠ 0 while all other components of stress state (or stress tensor) are equal to zero. For such a case [...]
In cup drawing many different processes take place simultaneously. The punch pushes the sheet into the die (Fig. 11.13). The sheet under the punch pulls the remaining sheet in flange under the blank holder plate. As the punch advances, the sheet in flange is pulled over the die profile radius into cup wall. In doing so the sheet in the [...]
Friction is an important process parameter in all most all metal forming processes. Some of the processes such as rolling of metals depend on friction for its successful execution. Friction is as important to rolling as it is for walking by humans and animals. Nevertheless, the evaluation of friction has so far been a difficult task and determination of exact [...]
The following points highlight the four main processes involved in the formation of metals. The processes are: 1. Explosive Fabrication 2. Hydroforming 3. Electro-Hydraulic Forming 4. Magnetic-Pulse Forming. Process # 1. Explosive Fabrication: It is also known as high-energy-rate forming. It develops high rate of energy transfer by increasing the velocity instead of using high values of mass. Explosive forming [...]