The cast iron box table is mainly used for the inspection of the parallelism and perpendicularity of the parts and supports the workpiece during scribing. One of the working surfaces has a V-shaped groove;

The material of the cast iron platform is generally HT200-250. The hardness of the working face is HB170-240. The hardness value of the cast iron platform is an important indicator of the quality of the cast iron platform.

Steel is an iron-carbon alloy in which the mass fraction of carbon (carbon content) is less than 2.11% and contains a small amount of Si, Mn, S, P and other elements. C, Si, Mn, S, and P are often called the five elements of steel.

The process method of scraping the thin layer on the surface of the workpiece with a scraper is called scraping, and scraping is a finishing method. Scraping is to apply a layer of display agent between the workpiece and the calibration tools or other matching workpieces.

Generally speaking, people identify engineering materials in practice, on the one hand, they rely on various instruments and equipment, and on the other hand, they perform visual inspections based on the experience accumulated in practice.

Scraping is the use of tools like scrapers, reference surfaces, measuring tools and display agents to Manual, scrap, grind and measure, so that the workpiece can reach the size, geometry, surface roughness and adhesion specified in the finishing process.