What is a Rivet? A rivet has a cylindrical shank with a head at one end. It is used to make permanent joints between two plates. Rivet is inserted into the holes of plates (which are to be joined) and then its protruding part is upset by a hammer. Joints made with rivets are known… Read More »
What is residual stress? Stresses can the broadly classified into two parts. Load stresses Residual stresses Load stresses are those stresses which remain within elastic limits and are induced due to external forces. When these forces are removed these stresses also become zero. Load stresses can be easily calculated from the equations of strength of… Read More »
In this article we will discuss hot and cold working process of metals. First, we will learn hot working and then we will learn cold working of metals. Before moving further let us understand concept of recrystallisation, it would be very helpful to us later. What is recrystallisation temperature? The temperature at which new stress-free… Read More »
What is fiber reinforced plastic? Fiber reinforced plastic (FRP) is a type of plastic in which the strength of low strength plastic material is increased by means of high strength of fibers. Fiber reinforced plastics contains to main things one is matrix and another is fiber. The function of matrix is to support and hold… Read More »
What are ceramics? The word ceramics is derived from the Greek word keramos which means ‘potter’s clay’. However, many compounds which are classified as ceramics today contain no clay. Modern Ceramics can be defined as the compounds of metals and non-metals. They generally have ionic atomic bonding between them. Traditional ceramics include insulating materials, glass, refractories,… Read More »
What is heat treatment? Heat treatment process is the controlled heating or cooling of plain carbon steel or alloy steel. Heat treatment of steel is done to change its molecular structure, in order to obtain certain mechanical properties. These mechanical properties could be hardness, strength or ductility. Various types of heat treatment processes are done… Read More »
Milling – An overview Milling machines are perhaps the most widely used in manufacturing after lathes. However, milling machines use multi point cutting tool but lathe machines use single point cutting tool. What is milling? A milling machine uses a cutter with a multiple teeth, these teeth (one by one) engage with the work piece… Read More »
What are machine tools? Machine tools are defined as a tool which while holding the cutting tool would be able to remove metal from the workpiece. Material is removed from the workpiece in order to generate desired shape. Some examples of M/C tools are milling cutter, drill bit, shaper etc. Classifications based on capability of… Read More »
What are cutting fluids? Cutting fluids are the fluids which are generally applied while the machining (or cutting) operation is taking place. The machining operation can be any i.e. milling, turning, drilling etc. Sometimes a cutting fluid is also referred as coolant but it is wrong. A cutting fluid performs several functions and cooling the… Read More »
What is a material removal process? Material removal process is a type of manufacturing process in which the final product is obtained by removing excess metal from the stock. The best example of a machining process is generating a cylindrical surface from a metal stock with the help of a lathe. This is one of… Read More »