Gantry milling machine castings

The casting of the gantry milling machine is mainly formed by resin sand casting method.Our company's gantry milling machine castings can reach 45T.Tensile strength:≥250N/mm2,hardness:HB=190~240.During the casting process,HT250 test bars were cast.After chemical inspection,it was found that the base casting of the gantry milling machine meets the chemical composition standards of HT250 and meets the standards for mechanical performance testing.Improve the quality of the castings of the gantry milling machine.

Introduction to Process Treatment of Castings for Gantry Milling Machine

1.The heat treatment process reduces the stress deformation of castings to a small degree.Use tends to be more stable.

2.Tensile strength:≥250N/mm2,hardness:HB=190~240.And meet the chemical composition standards of HT250 and meet the standards of mechanical performance testing.Improve the quality of the machine tool bed.All are cast using resin sand and lost foam,with a single piece capacity of over 40 tons and an annual production capacity of around 8500 tons.

3.The processing technology of the gantry milling machine can be used for docking production of the bed exceeding 8 meters,and overall processing is carried out during processing to meet the overall accuracy of the machine bed.

Casting standard for gantry milling machine:GB9434-88;Flat panel standard:JB/T7974-1999;Dimensional tolerance:GB6414-1999;Quality tolerance:GB/T11351-89;The hardness of castings and flat countertops is HB160-220,while other products such as rulers are HB170-240(with a hardness difference not exceeding HB40).Castings undergo annealing treatment,internal stress,and furnace cooling at 530-560 degrees Celsius.