Introduction:Our company is a professional manufacturer of various machine tool platform measuring tools, mainly producing special-shaped machine tool castings, HT250 machine tool castings, machine tool steel castings, cast iron platforms, large machine tool castings, marble bed bodies, marble platforms, inspection plates, marking plates, welding plates, T-groove platforms, boring and milling machine workbenches, and assembly platforms. hotline

machine toolBed frame castings, also known as large irregular castings,Large bed frame castings,Large gray iron castings, gray iron castings, machine tool bed standards, GB9439—88.
1、 Machine bed standard:GB9439—88
2、 Characteristics of bed frame:
(1)Good wear resistance and shock absorption. Due to the favorable lubrication and oil storage properties of graphite in cast iron, it has good wear resistance. Similarly, due to the superior shock absorption properties of graphite compared to steel.
(2)Good process performance. Due to its high carbon content and eutectic composition, gray cast iron has a relatively low melting point, good flowability, and low shrinkage rate, making it suitable for casting complex or thin-walled castings. In addition, due to the tendency of graphite to form chips during cutting, the machinability of gray cast iron is superior to that of steel. Our factory also produces various large casting products such as machine tool bed frames, large castings, and vertical lathe castings.

Grey cast iron is mainly used as a blank for machine parts, and some precision castings can also be directly used as machine parts. Castings account for a large proportion in mechanical products, such as tractors, where the weight of castings accounts for approximately the weight of the entire machine50～70%The proportion of agricultural machinery40～70%Zhongda, machine tools, internal combustion engines, etc70～90%Among various types of castings, mechanical castings have the most varieties, the most complex shapes, and the largest quantities, accounting for about% of the total casting production60%Next are steel ingot molds used in metallurgy and pipelines used in engineering.
The non machined surface and appearance quality of castings have a significant impact on their marketability, including:
⑴Surface roughness (swelling, shrinkage, and sand inclusion);
⑵Surface or cavity cleanliness (sticky sand, sticky“coating layer”）；
⑶Flatness deviation (unevenness of non machined surfaces);
⑷Surface roughness;
⑸Contour clarity (the contour clarity of structural units such as protrusions and umbilices, evaluated with the naked eye). Requirements for lost foam molds in machine tool castings: coating molds⑴Coating requirements: Use water-based graphite coating with a Bomei degree of60-70During painting, it should be done in a greenhouse and must not be moved before drying to prevent deformation⑵Brushing requirements: The paint should be stirred evenly, and the white should be exposed strictly during brushing.⑶Coating drying: After the coating is dried, it should have sufficient strength50-60℃The drying process24h.