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1. The plane wave weight of cast iron weights Place the plane wave motion meter on the flat work surface, and move the plane wave motion instrument along any straight line. The moving distance is half the length of the diagonal of the plate and should not be less than 200 MM. Take the difference between the minimum and maximum values ​​of the plane fluctuation meter's indication table (division value is 0.001 MM). That is, the plane fluctuation of the work surface of the plate to be inspected.
2. The ratio of the contact area of ​​the cast iron weight will be coated with the display agent on the inclined plane of the inspection plater, and shall be studied on a flat plate whose accuracy level is not lower than that of the caster. The obvious contact point shall be displayed on the tested flat plate, and then a In the range of 50mm x 50mm, 400 small square transparent thin plates of 2.5mm x 2.5mm (such as organic glass plates) are scored. Place an arbitrary position on the work surface of the panel to be inspected, and observe in turn the ratio of the area occupied by the contact points in each square (in units of 1/10). Calculate the sum of the above proportions, dividing by 4 is the ratio of the contact area of ​​the detected part. For typical values. The ratio of contact area should be measured at another location and the average of the two results determined.
3. The cast iron weight deflection will place the detection device on the working surface of the inspected flat plate. When no load is applied, the torsion spring comparator probe is brought into contact with the working surface (for accurate measurement, the measuring head can be placed between the measuring head and the working surface. A thin piece) and make a note of the reading. Then apply force according to the rated load specified in Table 5 and write down the reading; the difference between the two readings is the deflection value of the working surface of the inspected flat plate under the rated load.
Cast iron weight charge material is generally selected by cast iron according to GB718-82 selection, cast iron weight technical conditions and inspection: According to the type of cast iron weight, gray iron castings, malleable iron castings and ductile iron have different technical requirements. In general, grey iron castings are implemented in accordance with GB976-67. Pig iron for ductile iron according to GB1412-78 selection. The standard is divided into several groups, categories, and grades according to the chemical composition of pig iron, but carbon content is not considered. Inspection may be conducted in accordance with GB 1348-88. Its shape, size and quality deviations should meet the requirements of the drawings or meet the requirements of GB6414-1999. Flat plate's grade, processing allowance, size deviation should meet the requirements of the drawings or in line with the provisions of GB6414 - 1999.