detailed description
The cast iron platform is divided into rib plate type and box type. The working surface is rectangular, square or round. The working surface of the cast iron plate can be processed with V-shaped groove, T-shaped groove, U-shaped groove, round hole, long hole, etc. Cast iron plate castings shall be free of defects such as air holes, sand holes, cracks, hard partitions, sand inclusions, etc., and castings shall be free of defects such as lack of materials and short lengths. Before processing cast iron plate castings, appearance inspection shall be carried out, and heat treatment shall be carried out after they are qualified to remove the internal stress of cast iron to reduce the deformation of cast iron plate. After rough machining of cast iron plate, it is necessary to remove the machine tool and place it for 3-5 days before finish machining. The purpose of this is to completely remove the internal stress of cast iron plate, prevent deformation during use and reduce the precision of cast iron plate. http://www.bd95.com/
The cast iron plate material is HT200-300 high-strength cast iron, and the hardness of the working surface is HB170-240. Cast iron flat plate is manufactured according to the standard GB/T 22095-2008. According to the metrological verification regulation JJG117-2005 Flat Plate Verification Regulation, cast iron flat plates are divided into six levels: 00, 0, 1, 2, 3, and finishing. Cast iron plates are of various specifications between 200 × 200mm and 4000 × 9000mm, and those larger than this specification can be spliced for use.
Calculation formula for flatness of cast iron plate:
Class 000: 1 × (1+d/1000) Class 1: 8 × (1+d/1000)
Level 0: 2 × (1+d/1000) Level 2: 16 × (1+d/1000)
Level 0: 4 × (1+d/1000) Level 3: 40 × (1+d/1000)
① Where, d represents the diagonal length of the cast iron flat working surface mm,
② The flatness tolerance within the range of 0.02 α (20mm) from the edge of the working face shall not be considered, and any point shall not be higher than the working face. Tel: 15131785388
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