SK ENGINEERS

  WHAT IS PROCESS PLANNING ? Ø   INTRODUCTION TO PROCESS PLANNING – ·         Process planning is a system of a process responsible for the conversion of raw material into finished product by the most economical way within the limits of design specifications. ·         It can be defined as the systematic determination of the processes by which a product is to be manufactured economically and competitively. ·         It is a function within a manufacturing facility that establishes the processes and process parameters to be used to convert the part to the final form. ·         The process planning consists of activities like determining sequence of operations to be performed, selecting the proper machines, specifying tools, jigs and fixtures, specifying the material to be used, giving the details like speed, feed and depth of cut, specifyi...

  WHAT IS A COTTER JOINT AND KNUCKLE JOINT? Ø   COTTER JOINT – Ø   Introduction – 1.       A cotter joint is used to connect two co-axials rods or bars, which are subjected to axial tensile and compressive forces. It is temporary joint. 2.       A cotter is a flat wedge shaped piece having rectangular cross-section. 3.       Width of cotter is tapered (either on one side or both sides) from top to bottom for easy adjustments such as in and out of a rectangular slot made in spigot as well socket. 4.       Value of taper: taper in cotter varies from 1 in 48 to 1 in 24. 5.       Material for cotter: mild steel and wrought iron. Ø   APPLICATIONS OF COTTER JOINT – ·         Connection of piston rod to cross-head of a reciprocating steam engine. ·         Valve rod and its stem...

  IMPORTANCE OF ERGONOMICS AND AESTHETICS Ø   ERGONOMICS – 1.       Ergonomics is concerned with optimizing the overall and detailed design of controls, operations, and maintenance interfaces between machines and men, in both working conditions, normal and emergency. 2.       Men and machines interact simultaneously with environment, surrounding work place etc. in terms of efficiency, reliability, safety on low cost-effective basis. 3.       This involves a knowledge of human characteristics such as ; a)       Anatomy and physiology – structure and function of human body, senses, mental processes. b)      Anthropometry – information on body size, filed of movement, field of view, speed of response, forces exerted. c)       Psychology – knowledge of brain, nervous system and human behaviour. d)      Conditions, whi...