Cast iron test platform www.thjmjt.com inspection plate / test platform Application: Suitable for a variety of inspection, precision measurement of the reference plane; mechanical testing benchmarks for machine; check the dimensional accuracy of parts or shape deviation, testing platform material : from high-strength cast iron HT200-HT300 manufactured face hardness: HB170-240. Dimensional accuracy test platform used to check parts of or shape deviation, and for marking, applicable to the reference plane a variety of inspection, precision measurement. When using the first test platform installation and commissioning, and then clean working surface inspection platform, used in the case confirmed that no problem using the process, to avoid the workpiece and the face plate has a radical impact, prevent damage Face test platform; the weight of the workpiece must not exceed the rated load test platform, which will cause lower quality of work, damaged flat structure, or even cause flat deformation, so that it can not be used. Test platform surface quality inspection method uses color test. Test: flat, not less than 25 mm on each side within a range of 25 square point, two less than 20 points, three less than 12 points. Test platform Precision: According to the national standard verification procedures, namely 0,1,2,3 grade four level. Test platform material: cast iron HT200-HT300 manufactured from high strength, face hardness: HB170-240. Test platform specifications :( special specifications according to the demand side, drawing production or agreed upon production and processing) ???? Size (L × W)? Accuracy class 0 1 2 3 flatness tolerance 200 × 200 5 10 20.5? 200 × 300 5.5 11 22? 300 × 300 5.5 11 22? 300 × 400 6 12 24? 400 × 400 6.5 12.5 25? 400 × 500 6.5 13 26 66 400 × 600 7 14 27.5 70 500 × 500 6.8 14 28 68 500 × 600 7 14.2 28.5 71 500 × 800 8 15.5 31 78 600 × 800 8 16 32 80 600 × 900 8.3 16.5 33 83 1000 × 750 9 18 36 90 1000 × 1000? 20 40 97 1000 × 1200? 20.5 41 103 1000 × 1500 ? 22 45 112 1000 × 2000? 26 52 130 1500 × 2000? 28 56 140 1500 × 3000?? 70 174 2000 × 3000?? 74 184 2000 × 4000?? 88 219??