The properties of the fabricated end product made from base metal powders are dependent on the characterisation of the powder from production. The main characteristics that describe metal powders are as follows: · Morphology – describes the shape of the particle and its contour surface (Table 1) · Granulometry – specifies particle size and size distribution · Chemical composition…
Powder metallurgy is a branch of material science which deals with manufacturing of products from the powders of the materials. This metallurgical process is gaining importance day by day. Some of the most important applications of the powder metallurgical parts are a. Porous bearings which are prepared by this process are used for starters, clutches,…
Various MPIF award winning Powder Metallurgy components. (Photo courtesy MPIF) Powder Metallurgy is a technology which involves spending considerable time and effort in converting the starting material to the required powder form and then even further time and effort in “sticking” the material back together again to produce a more or less solid object. On…
The basic Powder Metallurgy process for structural press and sintered components Powder Metallurgy comprises a family of production technologies, which process a feedstock in powder form to manufacture components of various types. These production technologies generally involve all or most of the following process steps: Powder production Virtually all iron powders for PM structural part…
Introduction A brake is a device by means of which artificial frictional resistance is applied to a moving machine member, in order to retard or stop the motion of a machine. In the process of performing this function, the brake absorbs either kinetic energy of the moving member or potential energy given up by objects…
Introduction A clutch is a machine member used to connect a driving shaft to a driven shaft so that the driven shaft may be started or stopped at will, without stopping the driving shaft. The use of a clutch is mostly found in automobiles. A little consideration will show that in order to change gears…
Common terms used : The following terms, in connection with the worm gearing, are important from the subject point of view : 1. Axial pitch. It is also known as linear pitch of a worm. It is the distance measured axially (i.e. parallel to the axis of worm) from a point on one thread to the…
Common terms used: 1. Pitch cone. It is a cone containing the pitch elements of the teeth. 2. Cone centre. It is the apex of the pitch cone. It may be defined as that point where the axes of two mating gears intersect each other. 3. Pitch angle. It is the angle made by the pitch line…
1. Tangential component: The tangential component Ft is a useful component. Because it transmit power. Using the value of Ft , the magnitude of torque and transmitted power can be determined. 2. Radial component: The radial component Fr is a separating force which is always directed towards the centre of the gear. Fr does not…
Gear Terminology The following terms, which will be mostly used in this chapter, should be clearly understood at this stage. 1. Pitch circle. It is an imaginary circle which by pure rolling action, would give the same motion as the actual gear 2. Pitch circle diameter. It is the diameter of the pitch circle. The size of…