Mechanical Guru's

LUBRICATION SYSTEM IC engine is made of many moving parts. Due to continuous movement of two metallic surfaces over each other, there is wearing moving parts, generation of heat and loss of power in the engine. Hence, lubrication of moving parts is essential to prevent all these harmful effects. IN ENGINE THE FRICTIONAL LOSSES IS ATTRIBUTED DUE TO THE FOLLOWING MECHANICAL LOSSES: DIRECT FRICTIONAL LOSSES: Power absorbed due to the relative motion of different bearing surfaces such as piston rings, main bearings, camshaft bearings etc. PUMPING LOSS: Net power spent by the piston on the gas during intake and exhaust stroke More in case of four-stroke engine compared to two-stroke engine POWER LOSS TO DRIVE COMPONENTS TO CHARGE AND SCAVENGE: In four stroke-supercharged engine, compressor used to provide high-pressure air, which is mechanically driven by the engine. This is counted as negative frictional loss. In two-stroke engine scavenging pump is used wh...

DECISION MAKING PROCESS The decision-making as a process of administration has a wide range of application mainly in public administration. Behind this the work, a celebrity of public administration was active and he was H. A. Simon. His renowned work—Administrative Behavior; A Study of Decision-Making Process in Administrative Organization was published in 1948. Herbert Simon divided the concept into two main parts —one is decision— being arrived at and process of action. Mere making of decision is not enough and therefore its implementation. So both these sections are interconnected and important. Herbert Simon once said: a theory of administration should be concerned with the processes of decision as well as the processes of action. Simon pointed out that for the proper management of an organization a policy of comprehensive in nature is required to be adopted. So decision-making is a very important part of an organization. Herbert Simon, in fact, is the pioneer in th...

TURRET LATHE TURRET LATHE IS A FORM OF METALWORKING LATHE THAT IS USED FOR REPETITIVE PRODUCTION OF DUPLICATE PARTS (WHICH BY THE NATURE OF THEIR CUTTING PROCESS ARE USUALLY INTERCHANGEABLE). IT EVOLVED FROM EARLIER LATHES WITH THE ADDITION OF THE TURRET, WHICH IS AN INDEXABLE TOOL HOLDER THAT ALLOWS MULTIPLE CUTTING OPERATIONS TO BE PERFORMED, EACH WITH A DIFFERENT CUTTING TOOL, IN EASY, RAPID SUCCESSION, WITH NO NEED FOR THE OPERATOR TO PERFORM SETUP TASKS IN BETWEEN (SUCH AS INSTALLING OR UNINSTALLING TOOLS) NOR TO CONTROL THE TOOL PATH. (THE LATTER IS DUE TO THE TOOL PATH'S BEING CONTROLLED BY THE MACHINE, EITHER IN JIG-LIKE FASHION [VIA THE MECHANICAL LIMITS PLACED ON IT BY THE TURRET'S SLIDE AND STOPS] OR VIA IT-DIRECTED SERVOMECHANISMS TYPES OF TURRET LATHES THE ARCHETYPICAL TURRET LATHE, AND THE FIRST IN ORDER OF HISTORICAL APPEARANCE, IS THE HORIZONTAL-BED, MANUAL TURRET LATHE. IN MACHINE-SHOP JARGON, THE TERM TURRET LATH...