Precautions when assembling hydraulic cylinders in hydraulic presses

Frictional iron powder or iron filings caused by the abnormal force of the buffer plunger of the hydraulic cylinder. The fitting gap of the buffer device is very small, and when the lateral load on the piston rod is large, sintering may occur. These friction iron powder or metal fragments that have fallen off due to sintering will remain in the cylinder.
Scars on the inner surface of the cylinder wall of the hydraulic cylinder. The high pressure on the sliding surface of the piston causes sintering, which causes cracks on the inner surface of the hydraulic cylinder. The cracked metal falls off and remains in the hydraulic cylinder, causing scars.
When assembling a hydraulic cylinder, parts such as the piston and cylinder head have large mass, size and inertia. Even if there is lifting equipment to assist the installation, the required fit clearance is small, so the end of the piston will be thrown in hard no matter what. When the cylinder head or cylinder head boss hits the inner surface of the cylinder wall, it is easy to cause scars.
During assembly, foreign matter is mixed in and causes scratches. Before the final assembly of the hydraulic cylinder, all parts must be fully deburred and washed. When parts are installed with burrs or dirt, foreign matter is easy to embed due to "unnaturalness" and the weight of the parts. Cylinder wall surface, causing scars.