Accuracy of cast iron platform: according to the national standard metrological verification regulations, it is 0, 1, 2 and 3 respectively. Specification of cast iron flat plate and cast iron platform: 200mm×200mm—2000mm×4000mm (special specifications can be made according to the buyer's drawings or produced and processed through negotiation between both parties).
Standard specification parameters of cast iron flat plate (cast iron platform) are as follows: 200× 300mm 500× 600mm1000×1200mm1000× 2000mm 2500× 6000mm 300× 400mm 500× 800mm. ×3000mm 2500×5000mm 400×500mm 600×900mm 1500×2000×4000mm 3000×6000mm 500×500mm 1000×750mm 1500×3000mm 2000。
There shall be no less than 25 points within 25mm2 on each side of Class 0 1 Platform.
There shall be no less than 20 points within 25mm2 on each side of the secondary platform.
No less than 12 points within 25mm2 on each side of the tertiary platform.
The working surface of cast iron platform should be free of appearance defects such as rust, scratches and bumps that affect the use. There should be no casting defects such as sand holes, air holes, cracks, slag inclusion and shrinkage porosity on the working face. The molding sand should be cleaned on the surfaces of various castings, and the surfaces should be smooth and painted firmly. All edges should be blunt. The cast iron platform is allowed to block sand holes with a diameter less than 15mm on the working face of the platform, the accuracy grade is lower than "00", and its hardness should be lower than the surrounding materials. There should be no more than four sheltered parts on the working face, and the distance between them should not be less than 80 mm.
Standard formula for precision grade inspection of cast iron platform | Cast iron platform:
000 category:/kloc-0 /× (1+d/1000)1:8× (1+d1000).
0:2×( 1+D/ 1000)2:16× (1+d/1000)
0:4×( 1+d/ 1000)3:40×( 1+d/ 1000)
Matters needing attention in inspection: where: d-diagonal length of cast iron flat working face, mm
The flatness tolerance is in the range of 0.02α (maximum). 20mm) shall not be counted, and shall not be higher than the working face at any point.
When measuring cast iron flat plate, the best temperature is 18-25 degrees Celsius.
Common sense of use and maintenance of cast iron flat plate (cast iron platform);
1. In order to prevent the cast iron plate from deforming, when hoisting the cast iron plate, four steel wires with the same length should be hung on the four hanging holes of the cast iron plate at the same time, and the cast iron plate should be hung on the transport vehicle smoothly.
2. Pad the stress points of the cast iron flat plate to ensure that each stress point is evenly stressed and the whole cast iron flat plate is stable.
3. When the cast iron plate is installed, all supporting points of the cast iron plate should be padded with adjusting pads, and the cast iron plate will be adjusted to the qualified accuracy by professional technicians.
4. When using cast iron flat plate, handle its supporting workpiece carefully. Do not move rough workpieces on the cast iron flat plate to avoid collision, scratch and other damage to the working surface of the cast iron flat plate.
5. In order to prevent the overall deformation of the cast iron plate, the workpiece should be removed from the cast iron plate after use to avoid the deformation of the cast iron plate caused by the long-term heavy pressure of the workpiece.
6. When the cast iron plate is not in use, the working face should be cleaned in time, and then coated with a layer of antirust oil, covered with antirust paper and covered with the outer packaging of cast iron plate to prevent the working face of cast iron plate from being accidentally damaged at ordinary times.
7, cast iron plate should be installed in a ventilated, dry environment, and away from heat sources, corrosive gases, corrosive liquids.
8. Cast iron flat plates shall be inspected regularly according to national standards. According to specific conditions, the inspection period can be 6- 12 months. Packaging: iron plate packaging and wooden packaging. The surface of the platform is packed with plastic film, which is suitable for flat inland transportation, and has good moisture-proof, shock-proof, rust-proof and rough handling measures to ensure safe delivery to the site.
Transportation of cast iron: transportation is an important link to ensure that the flat plate is not deformed, so it is necessary to ensure that the flat plate is not overloaded, overspeed, fatigue driving or transported in bad weather.
Precautions for use: the tablet should be installed and debugged before use. Then, clean the working surface of the flat plate and make sure there is no problem before using it. In the process of use, attention should be paid to avoid excessive collision between the workpiece and the flat working surface to prevent damage to the flat working surface. The weight of the workpiece shall not exceed the rated load of the flat plate, otherwise the processing quality will be reduced.
If it is lowered, it may destroy the structure of the flat plate, or even deform the flat plate, making it damaged and unusable.