Cast iron box tables are mainly used to check the parallelism and perpendicularity of parts and support the workpiece when scribing. They are generally cubes or cuboids with the same side length.

In addition to the stability of the verification location, the inspection results should be unified on the same datum plane when the machine tool casting is inspected. When it is placed in different positions, the scribing plate and the three fulcrum loads of the scribing platform change unbalancedly,

The dimensional accuracy of machine tool castings depends on the strict degree of process design and process control. The higher the dimensional accuracy of castings, the stricter the control of factors, and the correspondingly higher casting production costs. There are scientific standards to coordinate the requirements of both the supplier and the demander.

Cast iron plate accuracy: According to the standard metrological verification procedures, there are four levels of 0, 1, 2, and 3. The material is high-strength cast iron HT200-300. The hardness of the working surface is HB170-240.

The adjustable cast iron pad has two adjusting pad irons (two-layer adjusting pad iron) and three adjusting pad irons (three-layer adjusting pad iron). The horns are brought from random beds, and their standards and quantities are described by the equipment manufacturer.

The magnetic V-shaped block is easy to use, and the parts cannot be disassembled arbitrarily, so as not to reduce the magnetic force and affect the service life.