Advantages of Machine Tool Castings:
1Resin sand molds offer good rigidity, allowing for the initial casting of sand molds. This enables the utilization of the graphitization expansion during the iron casting solidification process, thus minimizing shrinkage porosity and shrinkage cavities, achieving low or no riser casting for gray cast iron and ductile iron parts.
2In solid mold casting, polystyrene foam patterns are used, with phenolic resin self-hardening sand for molding. When the metal melt is poured into the mold, the foam pattern vaporizes and burns under the action of the high-temperature metal melt, dissipating. The metal melt takes the place of the original foam, cooling and solidifying into a solid casting piece with the same shape as the pattern.
3Compared to traditional sand casting, the lost foam casting process offers significant advantages for producing single or small batch quantities of automotive covers, machine tool beds, and other large molds. It not only eliminates the expensive wood mold costs but also simplifies operation, shortens production cycles, and boosts efficiency. It boasts advantages such as small dimensional tolerance, minimal machining allowances, and excellent surface quality.
The non-finished surfaces and appearance quality of castings significantly impact the commercial value of the casting products, including:
（1Surface convexity (puckering, indentation, and sand inclusion);
（2Surface or cavity cleanliness (adhered sand, adhered particles)“Coating layer”）；
（3Flatness Deviation (unevenness on non-machined surfaces)
（4Surface roughness
（5Edge definition (clearness of contours for structural units such as bosses, hubs, etc., assessed visually). Machining machine casting requirements for the disappearing mold:Coating Mold(1):Paint requirements:Water-based graphite coating,Its Baume degree is60-70Between,Apply paint within a greenhouse,Absolutely no movement before drying.,To prevent deformation(2)Brush coating requirements:Thoroughly mix the paint.,Brush painting strictly without showing white..(3)Coating Drying:The paint must have sufficient strength after drying.,In50-60℃Drying24h
Machine tool castings are a type of casting product widely used among many castings, such as mechanical castings, utilizing resin sand and lost foam molding, with individual pieces reaching40Over 1 ton, annual production capacity of8500tons.
Machining machine castings are made of Fine gray cast ironHT200-HT300Ratio, High tensile and bending strength ensure worry-free purchasing for you.
Machine tool castings utilize Popular heat treatment processes reduce stress deformation of castings to Xiao Du, used Trending stable.
Machining Machine Casting Gray Cast Iron Parts Standard:GB9439—88。
Features of Machining Machine Casting:
Machine tool castings have good vibration-damping properties. Since graphite in cast iron is beneficial for lubrication and oil storage, it is favorable. Similarly, due to the presence of graphite, gray cast iron exhibits better vibration-damping properties than steel.
Machining casting has excellent process performance. Due to the high carbon content in gray cast iron, which is close to eutectic composition, its melting point is relatively low, with good fluidity and low shrinkage rate, making it suitable for casting complex structures or thin-walled castings. Additionally, the gray cast iron has better machinability than steel, as the graphite facilitates the formation of chip breakage during cutting.
Machine Tool Casting Heat Treatment Process:
Bed frame castings, as a type of large-scale casting Heat treatment is required to enhance the inherent performance of cast iron castings. Metal heat treatment is one of the crucial processes in mechanical manufacturing. Compared to other processing techniques, heat treatment typically does not alter the shape or overall chemical composition of the workpiece. Instead, it modifies the internal microstructure of the workpiece or alters the chemical composition of the surface, thereby imparting or enhancing the workpiece's performance characteristics. Its key feature is the inherent quality of the workpiece.
To achieve the desired mechanical, physical, and chemical properties of metal workpieces, in addition to selecting materials and various forming processes reasonably, heat treatment processes are often Steel is widely used in the machinery industry. Wide materials, with complex microstructures in steel, can be controlled through heat treatment, thus making heat treatment of steel a major part of metal heat treatment. Additionally, metals like aluminum, copper, magnesium, titanium, and their alloys can also be altered through heat treatment to change their mechanical, physical, and chemical properties, achieving various performance characteristics for different applications.
Overall heat treatment is a metal heat treatment process that involves heating the workpiece as a whole and then cooling it at an appropriate rate to alter its overall mechanical properties. The basic processes of overall heat treatment for steel include annealing, normalizing, quenching, and tempering.
