Making Out Surface Plate can be made into the rib type or box type, and its working surface could be rectangle, square or round. Additionally, the working surface are allowed to have V or U-shaped grooves, round holes, slot holes. Etc. A surface plate is a solid, flat plate used as the main horizontal reference plane for precision inspection, marking out (layout), and tooling setup. The surface plate is often used as the baseline for all measurements to the workpiece.
划线平台的生产工艺流程基本是：
Technological process of production of Making Out Surface Plate:
Technological process of production of Making Out Surface Plate:
1. Rough casting:
Make drawings according to the technical requirements-Making mold as per the drawings-Prepare material-Modelling-Filling sand-drying-casting-Surface cleaning -Casting parts testing.
2. Heat treating and aging treatment, to reduce the internal stress of castings and to prevent it from deform after machining.
3. Rough machining:
Visual Inspection-Marking-Machining -Final inspection and test.
4. Precision finishing:
Leveling -Scraping- Inspection and testing.
5. Final finish:
Painting,-packing -deliver to warehouse.
The accuracy of the Cast Iron Surface Plate refers to the deviation from flatness of the working surface and it shall be classified as Grade 0,1,2,3.
