Surface finish-Analysis of Surface Traces
Posted by mechlook info on December 11th, 2011 09:01 AM | No Comment
A numerical assessment is assigned to indicate the degree of smoothness (roughness) in a number of ways. In practice three roughness measures have shown themselves to be particularly useful.
1. Maximum Peak to Valley Height of Roughness This is obviously the ...
Surface finish-Mechanical Roughness Indicator (MECRIN)
Posted by mechlook info on December 11th, 2011 09:01 AM | No Comment
It is recent development from the tactile method. It is suitable for non-regular surfaces where the frictional properties measured compare with those provided by electronic stylus instrument, such as ground, honed, lapped, hand filed and emery clothed surfaces, etc. to ...
Other Methods of Interest Used for Evaluating Surface Roughness
Posted by mechlook info on December 8th, 2011 05:17 PM | No Comment
1. Pneumatic Methods of Evaluating Surface Finish. This Method has been successfully used for evaluating the micro irregularities. This method is popularly known as air-leakage method. The instrument works on the following principle. The compressed air is made to pass ...
Roughness Comparison Specimens
Posted by mechlook info on December 3rd, 2011 09:00 PM | No Comment
The roughness comparison specimens are used for qualitative assessment of the surface roughness. In this qualitative assessment of the roughness of the finished product is evaluated by visual or tactile comparison (i.e. lightly moving a finger nail across the lay ...
Surface Finish-Terminology as Per Indian Standards
Posted by mechlook info on December 3rd, 2011 08:59 PM | No Comment
Real Surface : is the surface limiting the body and separating it from the surrounding surface.
Geometrical Surface : is the surface prescribed by the design or by the process of manufacture, neglecting the errors of form and surface roughness.
Effective Surface ...
Assessment of Surface Roughness as Per Indian Standards
Posted by mechlook info on December 3rd, 2011 08:59 PM | No Comment
There are various methods of evaluating the surface roughness but the most prominent and commonly used methods are the M system and the E (Envelope system) system. The M system expresses the arithmetical average departure of the actual surface ...
Surface Finish-Direct Instrument measurements
Posted by mechlook info on November 12th, 2011 06:17 PM | No Comment
These methods enable to determine a numerical value of the surface finish of any surface. Nearly all instruments used are stylus probe type of instruments. These operate on electrical principles. Further, these electrical instruments can be of two kinds. In ...