Inspection surface plate is usedas the main datum for measurement of the machinery parts’ geometrictolerance,such as flatness, parallelism, straightness and more. It is also canbe used for precision inspection, marking out (layout), and tooling setup. TheInspection surface plate is often used as the reference plane and baseline forall measurements to the workpiece and often used with straight Edge, SquareBlocks, V Blocks, Angle Plates, Parallel. etc.

Producing Procedure ofInspection Surface Plate:

1. Rough casting:

 Make drawings according to the technicalrequirements-Making mold as per the drawings-Prepare material-Modelling-Fillingsand-Drying-Casting-Surface cleaning -Casting parts testing.

First time Heat treating toeliminate the internal stress

3. Rough machining:

Machining as per the drawing-Casting Parts’ inspection and test.

4. Second time Heat treatingand aging treatment, to eliminate the internal stress

5. Precision finishing:

Leveling -Scraping- Finalinspection and testing.

6 .Final finish:

Painting- Packing-deliver towarehouse.

The accuracy of the Cast IronSurface Plate refers to the deviation from flatness of the working surface andit shall be classified as Grade 0,1,2,3.