Machine Tool Table Casting

Machine Tool Table Casting is a key functional component of machine tools,serving as the direct bearing platform for workpieces during machining.As the core working surface where cutting,drilling,milling,and other operations are carried out,it bears the weight of workpieces and the impact of cutting forces,while ensuring precise positioning and movement of workpieces,which is crucial to the machining accuracy and surface quality of finished products.

To meet the rigorous requirements of industrial machining,machine tool table castings must have excellent comprehensive performance.They require high surface flatness and dimensional accuracy to ensure stable placement and precise positioning of workpieces;strong load-bearing capacity and rigidity to resist deformation under heavy workpieces and cutting forces;superior wear resistance to withstand long-term friction between workpieces and the table surface;and good vibration damping to reduce the impact of cutting vibrations on machining precision.

Grey cast iron is the preferred material for machine tool table castings,with HT250,HT300,and HT350 being the most commonly used grades.These materials offer outstanding vibration damping,wear resistance,and machinability,which are perfectly suited to the working characteristics of machine tool tables.For high-precision and heavy-duty scenarios,ductile iron(QT500-7,QT600-3)is optionally adopted to enhance toughness and anti-deformation ability.The manufacturing process adopts resin sand casting to ensure structural integrity and surface quality,with strict control over melting temperature,inoculation treatment,and sequential pouring to eliminate internal defects such as shrinkage and pores.Artificial aging treatment is essential to reduce residual stress and ensure long-term dimensional stability.

Quality inspection strictly complies with international and national standards such as ISO 8062,ASTM A48,and GB/T 9439,including non-destructive testing(ultrasonic,magnetic particle)to detect internal flaws,and precision measurement with CMM to ensure surface flatness and dimensional accuracy.Widely applied in lathes,milling machines,CNC machining centers,and boring machines,these castings provide a reliable working platform for efficient,high-precision industrial manufacturing.