Abrasive Wear Testing Machine
In this project we are using abrasive material for smoothing a job so that we could be able to check the abrasive wear of the particular material. We are using 1HP AC motor which is being used to drive the Grinder. We are using a funnel to pour the abrasive material on the job. A weight lifter is being used to adjust the Job near the grinder. In this attachment a weight lifter and a spring is attached in such arrangement so that we could be able to adjust the position of the Job.
Definition of Wear:
Wear is related to interactions between surfaces and specifically the removal and deformation of material on a surface as a result of mechanical action of the opposite surface. In materials science, wear is erosion or sideways displacement of material from its “derivative” and original position on a solid surface performed by the action of another surface. Wear of metals occurs by the plastic displacement of surface and near-surface material and by the detachment of particles that form wear debris. The size of the generated particles may vary from millimeter range down to an ion range. This process may occur by contact with other metals, nonmetallic solids, flowing liquids, or solid particles or liquid droplets entrained in flowing gasses. Wear can also be defined as a process where interaction between two surfaces or bounding faces of solids within the working environment results in dimensional loss of one solid, with or without any actual decoupling and loss of material. Aspects of the working environment which affect wear include loads and features such as unidirectional sliding, reciprocating, rolling, and impact loads, speed, temperature, but also different types of counter-bodies such as solid, liquid or gas and type of contact ranging between single phase or multiphase, in which the last multiphase may combine liquid with solid particles and gas bubbles.
About Abrasive wear
Abrasive wear occurs when a hard rough surface slides across a softer surface. ASTM International (formerly American Society for Testing and Materials) defines it as the loss of material due to hard particles or hard protuberances that are forced against and move along a solid surface.
Abrasive wear is commonly classified according to the type of contact and the contact environment. The type of contact determines the mode of abrasive wear. The two modes of abrasive wear are known as two-body and three-body abrasive wear. Two-body wear occurs when the grits or hard particles remove material from the opposite surface. The common analogy is that of material being removed or displaced by a cutting or plowing operation. Three-body wear occurs when the particles are not constrained, and are free to roll and slide down a surface. The contact environment determines whether the wear is classified as open or closed. An open contact environment occurs when the surfaces are sufficiently displaced to be independent of one another Deep ‘groove’ like surface indicates abrasive wear over cast iron (yellow arrow indicate sliding direction)
There are a number of factors which influence abrasive wear and hence the manner of material removal. Several different mechanisms have been proposed to describe the manner in which the material is removed.
AC MOTOR (1 hp)
Job for grinding purpose
When we give ac supply to the ac motor it starts the grinding machine to rotate at a particular speed which is desired for grinding purpose. The job which is supposed to be tested for abrasive wearing is clamped In the job holder. We can adjust the position by putting weight on the weight lifter mechanism attached with the Job holder. Abrasive material is coming down from the funnel on the Job. Hence the job is being grind in a smooth way.
It can be used for testing the abrasive wear of the material.
It can be used for grinding and smoothing purpose.
After all the testing we are successful in taking out the expected results of the project. It is working fine and in a smooth way. We can do modifications in the future so that we could be able to find out the wear resistance and the hardness of the material as well.