The honing tube should depressurize the hydraulic circuit before removing the hydraulic cylinder. Otherwise, when the oil pipe joint connected to the oil cylinder is loosened, the high-pressure oil in the circuit will be sprayed out quickly. When the hydraulic circuit is depressurized, first loosen the handwheel or pressure regulating screw at the relief valve, etc. to unload the pressure oil, and then cut off the power supply or cut off the power source to stop the operation of the hydraulic device.
The disassembly of the honing tube should be carried out in sequence. Due to the different structures and sizes of various hydraulic cylinders, the disassembly sequence is also slightly different. Generally, the oil in the two chambers of the cylinder should be drained, then the cylinder head should be removed, and the piston and piston rod should be removed. When dismantling the cylinder head of the hydraulic cylinder, special tools should be used for the key or the snap ring of the internal key type connection. Flat shovel should not be used. For the flange type end cover, it must be pushed out with screws. . When the piston and piston rod are difficult to be pulled out, they cannot be forced out, and the reason should be found out before disassembly.
Before and after the honing tube is unloaded, try to create conditions to prevent the parts of the hydraulic cylinder from being polluted by surrounding dust and impurities. For example, when disassembling, try to disassemble in a clean environment. After disassembling, all parts should be covered with plastic cloth, not cotton cloth or other working cloth.
When the honing tube is disassembled, it should effectively prevent damage to the top thread of the piston rod, the thread of the oil port, the surface of the piston rod, the inner wall of the cylinder liner, etc. In order to prevent slender parts such as piston rods from bending or deforming, they should be balanced with skids when placed. After the cylinder is disassembled, it should be carefully checked to determine which parts can continue to be used, which parts can be used after repair, and which parts must be replaced.
The purpose of rolling the cylinder barrel made of the honing tube is to reduce the tiny cracks on the surface of the honing tube, seal the cracks, and at the same time improve the fatigue strength of the honing tube. It is important to note that the floating boring tool is used for finishing before rolling, so as to ensure the smoothness of the hole wall before rolling, the rolling allowance and the geometrical dimensional accuracy of the hole.