(1) If the cylinder body is inlaid with a copper sleeve, the method of replacing the copper sleeve can be selected for correction. First trim the diameter of a group of plunger rods to a common specification, and then polish the outer diameter with sandpaper above 1000#.
Three methods of copper sleeve for cylinder equipment:
(A) The cylinder body is heated and heated or the copper sleeve is low-temperature freezing and kneading, interference equipment; (b) Loctite adhesive bonding equipment is used, this method requires grooves on the outer diameter of the copper jacket; (c) Cylinder Hole tapping, copper sleeve outer diameter processing thread, Loctite glue, screw into the equipment.
(2) The cylinder body and copper sleeve of the sintering connection method, the correction method is as follows:
(A) Use a grinding rod to grind the cylinder hole manually or mechanically; (b) Use a coordinate boring machine to boring the cylinder hole from the beginning; (c) Use a reamer to correct the cylinder hole.
(A) Hydraulic pump electroplating: plating a layer of hard chromium on the surface of the plunger; (b) electric brush plating: brush plating material on the surface of the plunger; (c) thermal spraying or electric arc spraying or electric spraying: spraying high carbon martensite Material; (d) Laser welding: deposit high-hardness alloy powder on the surface of the plunger.
(4) The material of the cylinder body without copper sleeve is mostly ductile iron, and an amorphous film or coating is prepared on the inner wall of the cylinder. Because the inner wall of the cylinder bore has this special substance, it is adjusted to form a hard-hard friction pair. Assuming that the cylinder hole is blindly ground and the surface material of the inner wall of the cylinder hole is ground away, the function of the friction structure is also changed. The friction pair with the coating removed, assuming forced use, the friction surface temperature will increase, and the plunger rod and the cylinder bore will be glued.