The production process of cast iron platform is basically as follows
The production process of cast iron platform is basically as follows:
1、 Cast iron platform blank: make drawings according to the technical requirements, make wood shapes, ingredients, shapes, drying, casting, falling sand, cleaning and inspecting all parts of the blank according to the drawings;
2、 Cast iron platform machining: visual inspection and marking, processing, inspection;
3、 Leveling of cast iron platform workpieces, manual scraping and inspection by inspection department;
4、 Appearance treatment, painting, packaging and warehousing of cast iron platform.
5、 Flatness of cast iron platform: the general accuracy of cast iron platform can be divided into 0, 1, 2 and 3 levels. The precision standard of cast iron platform can be found in JB / T 7974-2000. The accuracy standard is generally determined according to the use. Cast iron platform with accuracy above level 3 is used for inspection, marking and assembly, while cast iron platform with accuracy below level 4 is generally used for riveting and welding.
Bearing requirements of cast iron platform: the bearing of cast iron platform refers to the deformation deflection of cast iron platform after the weight per unit area of cast iron platform. For the sake of understanding, we can see the pressure that the cast iron platform can bear without affecting the normal use after the workpiece is placed.
In the production process of cast iron platform, there will be some product defects. As long as the correct method can be used for process compensation, the defects of the working face of the marking platform can not be ignored. The main defects of the marking platform include: air hole, sand hole, sand inclusion, shrinkage porosity, etc. The defects of marking platform are dealt with in detail in JB / T 7974-2000 mechanical industry standard of the people's Republic of China. Service life of marking platform is closely related to defect repair. Therefore, when repairing the defects of marking platform, it is necessary to deal with them strictly according to the process requirements.
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