The working surface of the riveting and welding flat plate can be rectangular, square, circular, etc., and the material is HT200-300, QT400-600， Using scraping and grinding technology, V-shaped, T-shaped, U-shaped grooves, dovetail grooves, circular holes, long holes, etc. can be machined on the working surface. It is a flat reference measuring tool used for workpiece and equipment inspection, marking, assembly, welding, assembly, and riveting.

The flatness required for riveting and welding flat plates must meet the following conditions:

Thickness requirements: mainly including the thickness of the working surface on the cast iron platform, the thickness and height of the side panel, as well as the thickness, height, and density of the bottom gluten plate.

Material requirements: Cast iron HT200-300, hardness: HB170-240。

● Artificial annealing: After high-temperature annealing and aging treatment at 600-700 degrees Celsius in a tempering kiln.

● Natural aging: According to national standards, it should be 2-3 years. Due to the long duration of this process and the impact of capital turnover on enterprises, it is no longer possible to wait for such a long time. Therefore, vibration exciters are often used as a substitute for vibration aging. Although the effect of this process is not yet clear, it has been widely used in the industry.

Trachoma and stomata: Levels 0 and 1 platforms are not allowed to have stomata and trachoma, while levels 2 and 3 can be filled with solid materials of the same material as the platform to fill stomata and trachoma. Attention: The hardness of the filling material should be lower than the hardness of the platform itself.

Scraping process: Manual scraping is an important process in the machining of riveting and welding plates, which determines the flatness error of the riveting and welding plate and the number of touchable points on the working surface. The 0-level board platform shall have no less than 25 points within a range of 25mm square on each side; The first level platform shall have no less than 20 points within a range of 25mm square on each side; The second level tablet platform shall have no less than 16 points within a range of 25mm square on each side; The 3-level tablet platform shall have no less than 12 points within a range of 25mm square on each side. After the scraping is completed, the four edges of the platform become dull.

Cleaning and painting: The bottom surface of the platform should be cleaned and sprayed with red anti rust paint. The side should be leveled before painting, usually with basket paint or green paint.

● Packaging requirements: Mainly wooden packaging, try to use thick wood to cover the working surface on the platform, and make fully enclosed packaging. Rust prevention measures should be taken for the working surface of the platform before packaging.

Transportation requirements: After loading on the platform, check if there is any suspension. If there is any suspension, it should be padded to avoid vibration. Do not stack the platform too high to avoid deformation due to compression.

● Accessory selection: The main focus is on the selection of brackets, which are made of square steel and angle iron with a wall thickness of 1.5-2mm. The welding density and structure should be reasonable, and the adjusting bolts should rotate smoothly.

Installation and debugging: Generally, a frame level is used to level it first, and then an optical or electronic image level is used to measure the flatness error again. If there are any problems, the platform manufacturer can be requested to come to the site for scraping.

● Correct use: The riveting and welding plate can be used after debugging is completed. The room temperature should be controlled at 20 ± 5 ℃. When testing the workpiece on the table, it should be placed and moved gently, and not concentrated in one area. Try to evenly use the entire area of the riveting and welding plate.