Saturday, April 2, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

CrazyEngineers Forum - Mechanical & Civil Engineering

Surface finishing process-Lapping

Posted: 02 Apr 2011 12:44 AM PDT

Lapping is a surface finishing process used to give a surface finish to articles. It is essentially an abrading process. Very less material can be removed from this process only around 0.005 to 0.01 mm is removed. This is a low efficiency process and is used only when a required amount of surface finish is required.

In this process, the laps i.e.; lapping shoes are charged with abrading powders like emery, iron oxide, chromium oxide. Laps are made from any material like soft cast Iron soft steel, brass etc. These laps are made to rub against the surface so that the irregular surface erodes. For better surface finish, the laps can be given reciprocating motion etc. In short two types of motions can be combined


The lapping machine is available in three types.
1.Vertical axis lapping machine
2. Center less lapping machine
3.Abrasive belt lapping machine.

Stribeck Curve for lubricant comparison

Posted: 02 Apr 2011 12:28 AM PDT

I need to plot a Stribeck curve for a lubricant over all regimes of lubrication. I have access to a pin/ball on disk machine. However, in most literature pin on disk is performed only for Stribeck curve plotting of boundary/mixed lubrication regimes. Is there a particular reason for not being considered for EHD and HD regimes? The possible sliding speeds are in the range of 0.75m/s to 7.5m/s. The range of load is 5-200N(6 mm pin diameter).
Posted by at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)