Flatness Measurement Using Slip Gauges

Flatness measurement using slip gauges (also known as gauge blocks) involves utilizing their ultra-flat, lapped surfaces as high-precision dimensional and geometric reference standards in metrology

Transcript

1. Mr.G.V.Pujari
2. Flatness Measurement Using Slip Gauges
3.  PRINCIPLE  Flatness is measured by comparing the surface of the workpiece with a reference plane using slip gauges and a dial indicator. The variation in readings at different points indicates the deviation from a true plane.
4.  PROCEDURE  Place the workpiece on a surface plate.  Clean the surface plate, workpiece and slip gauges properly.  Select suitable slip gauges and build a stack of known height.  Place the slip gauge stack near one end (reference point).  Set the dial indicator to zero at the reference position.  Move the dial indicator over different points on the surface.  Record the readings at each point.  Find the maximum and minimum readings.  Calculate the flatness error.
7.  ADVANTAGES  High accuracy  Simple and reliable method  Slip gauges provide precise reference  Suitable for precision inspection
8. Thank You