The overall specification of the verification tablet is 4 meters by 8 meters. If it is larger than this specification, multiple pieces can be spliced together. After wear and tear, it can be re scraped to restore its accuracy. The flatness of the parts can be checked by coloring method, which has the advantages of accuracy, intuitiveness, and convenience. Pushing the gauge seat and workpiece smoothly on the scraped cast iron flat plate without any rough feeling facilitates measurement and accuracy.

The quality of cast iron and heat treatment for verifying the flat plate has a significant impact on its performance, or the working surface may deform due to residual large internal stresses; Or due to the inability to maintain accuracy; Or due to difficulty in scraping, roughness with small values cannot be obtained. Therefore, when using cast iron plates, attention should be paid to the selection of cast iron materials, and methods such as aging treatment should be used to verify the residual stress of the plates.

Verify tablet material:

Cast iron HT200-300, after two manual treatments (manual annealing at 600-700 degrees and natural aging for 2-3 years), has stable accuracy and good performance when used.

Verify the material of the tablet:

The HT200-300 calibration tablet is manufactured according to the GB7947-1999 standard. The accuracy levels of the verification plate include 0, 1, 2, 3, and precision planing. The verification plate is made into reinforced plate and box type, and the working surface is rectangular, square, or circular. The cast iron flat working surface adopts scraping technology, and V-shaped, T-shaped, U-shaped grooves, circular holes, long holes, etc. can be machined on the working surface.

Purpose of verification tablet:

The verification tablet can be used as a measurement benchmark for checking the flatness, parallelism, straightness and other geometric tolerances of mechanical parts. It can also be used for marking and measuring parts, experiments, riveting, welding, foundations, workbenches, etc. The working surface adopts scraping and grinding technology, and can be designed with circular holes, rectangular holes, square holes, T-shaped grooves, U-shaped grooves, V-shaped grooves.