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Cast iron platform
The cast iron plate is also called cast iron platform. The appearance is basically box type. The working surface has rectangular, square and round shapes. The material is HT200-300, QT400-600. It adopts scraping process, and the working surface can process V shape and T. Shape, U-shaped groove, dovetail groove, round hole, long hole, etc., are plane reference measuring tools for workpiece, equipment inspection, scribing, assembly, welding, assembly, and rivet welding.
Artificial annealing: aging treatment in a tempering kiln after 600-700 degrees high temperature annealing.
It mainly includes the thickness of the working face on the platform, the thickness and height of the side wall, and the thickness, height and density of the bottom ribs. It mainly includes the thickness of the working face on the platform, the thickness and height of the side wall, and the thickness, height and density of the bottom ribs.
Porcelain platform 0 and 1 platform are not allowed to have pores and trachoma, and 2 and 3 grades can be filled with stomatal trachoma with the same material as the platform. Note: The hardness of the filler must be lower than the hardness of the platform itself.
Cast iron plate can also be called cast iron platform can be used to test the measurement of mechanical parts flatness, parallelism, straightness and other geometric tolerances, can also be used for marking and measurement of precision parts, experiments, welding, welding, foundation, work Taiwan, etc., the working surface is scraped.
Cast iron platform material: high-strength cast iron HT200-300, after two manual treatments (artificial annealing 600 degrees - 700 degrees and vibration aging), the product has stable precision and good wear resistance.
The overall specification of the cast iron platform is 4m×8m. If it is larger than this specification, it can be spliced in multiple pieces. After wear, it can be repaired and restored to its accuracy. The flatness of the parts can be verified by coloring method, which is accurate, intuitive and convenient. . The table seat and the workpiece are pushed smoothly on the cast iron plate which has been scraped, and the workpiece is not smooth, which is convenient for measurement and ensures measurement accuracy.
The cast iron quality and heat treatment quality of the cast iron platform have a great influence on the performance of the flat plate, or the working surface is deformed due to the residual internal stress; or the precision cannot be maintained due to the inability to wear; or the value is not small due to the difficulty of scraping. Roughness. Therefore, the use of cast iron plates must pay attention to the choice of cast iron materials, using aging treatment and other methods to eliminate the residual stress of cast iron plates.
|specification||Accuracy class μm||specification||Accuracy class μm|
|Level 0||Level 1||Level 2||Level 3||Fine planing||Level 0||Level 1||level 2||level 3||Fine planing|
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