The hardness of the work surface: hardness of HB107-240. after two artificial treatment (artificial annealing 600 degrees -700 degrees or natural aging for 2-3 years) using the product's precision stability. Good abrasion resistance.

Material: high-strength cast iron HT200-300

Specifications: 100 * 100 ----3000 * 6000. (Greater than this specification platform can be assembled to use or drawings customized)

Precision: in accordance with national standards for measurement and verification procedures. Respectively 0. 1. 2. 3. four levels.

Check the flatness of the method and steps:

1, according to the shape and size of the flat plate to be tested to choose the form of distribution points, and determine the number of segments of each cross-section and the bridge plate span: L = l/n where l - the length of the cross-section being tested; L - bridge span; n - the number of segments.

2, the use of level measurement, the measured surface is adjusted to roughly in the horizontal position; the use of self-collimating instrument measurement, the measured line is adjusted to roughly parallel to the optical axis of the instrument

3, the inherent level or reflector bridge on the measured section, along the measurement direction of the spanning the first and last move the bridge to mark the readings of each position

4, according to the results of the verification of the segmentation of data processing, to find the flatness value Data processing, the flatness value. Cast iron plate casting materials: casting melting process control, the production of gray cast iron parts, must strictly control the quality of man furnace and man package materials, its composition, block degree and physical and chemical properties must be checked and accepted as required. Gestation cast iron is a kind of flake graphite gray cast iron, just manufacturing principle is different from ordinary cast iron, increase the gestation process. In the low carbon, silicon composition of the iron in the addition of appropriate amount of inoculant, in order to inhibit its excessive graphitization. Cast iron plate gauge more gray cast iron or ductile iron casting, to use gray cast iron to obtain qualified casting billet, must go through the sand milling - modeling - melting - pouring - cleaning - inspection and many other aspects, to ensure the quality of the gauge casting must be controlled in the casting process of each link. Casting molding process control, molding process control is the key process of generating gauge castings, directly affect the quality of gauge castings. The hardness of cast iron plate is HB160-210, and the other products such as flat ruler is HB170-240. the products have covered Xi'an, Hegang, Jiangxi Province, Siping, Bengbu, Zibo, Tieling, Suzhou and other areas. High-tech equipment to ensure the design, manufacture, installation and commissioning of one-stop service for customers.

Improvement methods

Molding core is one of the key processes in the formation of flat castings, it has a very important impact on the quality of castings, manufacturing costs, production efficiency, labor intensity and environmental pollution and other aspects.

1, clay sand wet sand molding process

Many years of production practice shows that has the advantages of low cost, low pollution, high efficiency, good quality and other advantages of injection molding, gas impulse molding and static pressure molding and other highly mechanized, automated, high-density humidity molding process, will become China's future production of small and medium-sized castings, an important development trend.

2, resin sand molding core process

Through the development of non-polluting or less-polluting binder, catalysts, research and matching environmental protection equipment, widely used and the development of resin self-hardening sand, cold core box self-hardening process, the warm core box method and the shell type (core) method.

Resin pan modeling process products cast iron plate, cast iron square box, curved plate, etc..

3, water glass sand molding core process

Research on water glass purification and modification to improve its bonding properties, the development of a new type of water glass sand reuse of old sand reclamation process and equipment, and to further promote the ester hardening of water glass sand in the application of medium and large-scale cast iron plate.

4, casting coatings

Expand and strengthen the transfer of coatings, surface alloying coatings in the field of application and mechanism research.

Cast iron plate In the continuous progress of science and technology, casting methods are also constantly improving. Flatness error refers to the measured actual surface of the ideal plane of the amount of change. In determining the amount of change, the ideal plane relative to the actual surface of the specific orientation plays a decisive role, because the different orientation of the ideal plane and the actual surface of the distance between the points is different. Used to determine the ideal plane orientation principles are as follows:

1, the principle of minimum conditions with two parallel ideal plane inclusive of the actual surface, and make the distance between the two ideal planes for the minimum, this minimum distance for the flatness error value.

2, the principle of tangency with an ideal plane tangent to the actual surface, and with the actual surface of the maximum distance between the minimum, the distance for the flatness value

3, the principle of least squares will be an ideal plane according to the tendency of the actual surface, placed in the middle of the actual surface, and make the actual surface of the distance between the various points of the ideal plane and the minimum sum of the squared to the minimum, the center of the least squares as a basis for evaluation. Plane as the evaluation of the base surface, the measurement point of the plane deviation in the maximum value and the minimum value of the difference between the measured surface flatness error value.

4, diagonal principle of a diagonal through the measured surface and parallel to the other diagonal plane as the evaluation of the base plane, the measurement point of the plane deviation in the maximum value and the minimum value of the difference between the measured surface flatness error value.

5, the principle of the loop method using the measurement of closed loop leveling principle, so that the measured points after the leveling of the new position to the measurement of the distance to the base surface becomes the distance between the points relative to the ideal plane. At this point the ideal plane is the natural horizontal plane through the origin.

6, the principle of three-point method provides the ideal plane through the actual surface of the farthest apart and not in a straight line formed by the three points of the plane for the evaluation of the base surface, to the measurement of each point from the plane of the deviation in the maximum value and the minimum value of the difference between the flatness of the surface to be measured for the error value.

7, the principle of maximum straightness to the actual surface of any cross-section of the maximum straightness error as the flatness error. Cast iron plate (cast iron platform) local error refers to the flat plate work surface local flatness processing quality, including the micro quality of the work surface processing and the work surface of a small range of local aberrations. The so-called processing of microscopic quality refers to the processing of the surface of the very small spacing tiny peaks and valleys unevenness, that is, surface roughness. Surface micro quality is good, wear-resistant, plate life is high. The small range of local aberrations in the working surface refers to the processing of surface unevenness, deformation. The small range of the working surface here, for small flat plate and accounted for is the local position, for large flat plate is the local area. Flatness reflects the flat plate local error.