A Complete Online Guide For Every Mechanical Engineers
CHEMICAL MACHINING In chemical machining, some chemicals are used to remove material from the required portions of the workpiece. This process is also called chemical milling. Chemical milling is done in the following steps. Cleaning The workpiece surface is carefully cleaned. Masking The portions of the workpiece which do not require machiningis covered with masking…
Punching Punching is a piercing operation. It is the operation of producing a circular hole in a sheet metal using a punch and die. The material pushed out through the die is the scrap. The punch size will be exactly the same as the size of the hole to be pierced. The die opening is…
CLASSIFICATION OF COMPOUND STEAM ENGINE The compound steam engines are usually classified into two types: 1. Tandem compound steam engine 2. Cross compound steam engine TANDEM COMPOUND STEAM ENGINE In this type of engine, the two cylinders usually will have a common piston rod and fixed in tandem, working on the same crank shaft. These…
Electro Chemical Grinding (ECG) Electro chemical grinding is also called electrolytic grinding. Metal is removed from the surface of the work piece by electro chemical action and also by abrasive action of a grinding wheel. 90% of metal is removed by electro chemical action and 10% of metal is removed by the abrasive action of…
Plasma arc machining When a free flowing gas is heated to a very high temperature it becomes partially ionized. This ionized gas is called as plasma. In this process metal is removed from the surface of the work piece with the help of high temperature plasma. Metal is also moved as a result of electron…
Jet propulsion Jet propulsion is based on newton’s second law and third law of motion. Newton’s second law states that the rate of change of momentum in any direction is proportional to the force acting in that direction. Newton’s third law of motion states that for every action there is an equal and opposite reaction….
Honing process It is an abrasive process used for finishing previously machined surface. It is generally used for finishing drilled or bored holes. The tool used in this process is called as hone. Hone is a bonded abrasive stone made in the form of a stick. The honing tool works the same way as that…
Types of Broaching Machines Horizontal broaching machine In this machine, the broach moves in a horizontal direction. A pull type broach is used. The pull type broach removes metal when it is pulled through the work piece. Internal and external broaching are done in this machine. But horizontal broaching machine is mainly used for internal…
Definition of Jig Jig is a device that firmly holds and locates work piece and also guides cutting tool during machining. Elements of Jig Jig body This is also called base. It supports work piece by locators and clamps. The base is fitted with four feet which rest on the machine table. Jig feet Jig…
Jet propulsion Jet propulsion is based on newton’s second law and third law of motion. Newton’s second law states that the rate of change of momentum in any direction is proportional to the force acting in that direction. Newton’s third law of motion states that for every action there is an equal and opposite reaction….
Jet propulsion Jet propulsion is based on newton’s second law and third law of motion. Newton’s second law states that the rate of change of momentum in any direction is proportional to the force acting in that direction. Newton’s third law of motion states that for every action there is an equal and opposite reaction….
Gear generating process This method of gear manufacturing is based on the fact that any two involute gears of the same module will mesh together. In this one of the meshing gears is made as the cutter. The other gear rotates and also reciprocates along the width of the gear blank. Because of the relative…
Slotter Slotter is a type of reciprocating machine. The tool is held in the ram reciprocates vertically and the work piece is held on the table. The slotter has a base upon which the column is being integrated. The column houses the driving mechanism for the ram. The top portion of the ram has…
Non-conventional machining process In recent years many new materials have been developed. These include titanium alloys, hast alloys, nimonic alloys etc. these materials cannot be machined accurately with the help of conventional machining process so a different method of machining has to adopted. These new method of machining is called as non-conventional type or unconventional…
