Use Liquid Nitrogen To Freeze Axle Sleeve 10Minutes For Contraction To Install Excavator Bucket ! - Video

Use liquid nitrogen to cool the workpiece first, so that its shape shrinks, the assembly gap is formed between the assembly surface, so that the part is used for assembly !

Usually, when the temperature changes, the volume of the object always changes, most objects (including solid, liquid, gas) when the temperature increases the volume to increase, when the temperature decreases, the volume to shrink, this phenomenon is called thermal expansion and cold contraction. In industrial production, the phenomenon of thermal expansion and cold contraction is widely used !

Liquid nitrogen freezing assembly is suitable for inclusion parts (such as planetary frame, torque arm, etc.) can not be heated or heating parts will lead to parts accuracy, material organization changes, affect its mechanical properties, the inclusion of parts (such as pins, elastic support shaft) can be frozen interference fitting assembly. Liquid nitrogen freezing assembly is suitable for all kinds of hot work mold, cold work mold assembly, gear and shaft assembly of all kinds of transmission, gear box, precision mechanical parts assembly, all kinds of motor stator, rotor assembly, automobile parts, engine parts. The cold loading method is suitable for the assembly of interference fit parts where the inclusion parts (such as planetary frames, torsion arms, etc.) cannot be heated or the heating parts will lead to changes in the accuracy of the parts, material organization, and affect their mechanical properties, and the inclusion parts (such as pins and elastic support shafts) can be frozen. When the hole is large or irregular shape, and the pressed part is small, it is difficult to implement the heating hole method, cold fitting can be used. The specific method is to cool the contained part at low temperature, reduce its size, and then load it into the parts with holes !

It is a non-removable fixed connection of large excess parts, which is suitable for cold loading process. The liquid nitrogen cold loading process is that when the inclusion part is not easy or suitable for heating due to size, weight or material, liquid nitrogen can be used as the coolant to cool the inclusion part to a certain temperature, so that its outside diameter is slightly reduced, and there is a certain gap between the inclusion part then assembly !