315-Ton Hydraulic Press: Causes and Solutions for Foreign Objects in the Hydraulic Cylinder

I. Foreign Objects Generated During the Movement of the Hydraulic Cylinder in a 315-Ton Hydraulic Press:

1. Iron or Iron Shavings due to Friction and Cushioning of the Piston Rod:

   • The small clearance in the cushioning device, coupled with significant lateral loads when the piston rod passes through, may lead to sintering phenomena.
   • Iron or iron shavings are formed due to sintering and remain in the hydraulic cylinder.

2. Scratches on the Cylinder Wall and Sintering:

   • Scratching of the inner wall of the cylinder due to high pressure on the sliding surface of the piston causes sintering.
   • Cracks push away metal residue, leaving it in the hydraulic cylinder.

3. Aging of Seals Leading to Wear with the Piston Rod:

   • Aging seals result in wear with the piston rod, allowing the aged part of the seal to enter the hydraulic cylinder.

Solution:

1. Design and adjust the clearance of the cushioning device reasonably to avoid friction-related issues.
2. Regularly inspect the inner wall of the hydraulic cylinder for scratches and perform maintenance.
3. Regularly check the seals, and replace aged seals to prevent aging components from entering the hydraulic cylinder.

II. Foreign Objects Entering the Hydraulic Cylinder from the Hydraulic System:

1. Unclean Hydraulic Pipeline:

   • Inadequate cleaning of the hydraulic oil pipe after production may introduce dust or impurities.
   • Acid cleaning and soaking in hydraulic oil post-cleaning are essential precautions.

2. Unclean Hydraulic Oil Tank:

   • The hydraulic oil tank should be cleaned and acidized after welding to remove welding slag and dust.
   • Proper cleaning prevents welding slag or impurities from entering the hydraulic cylinder along with the hydraulic oil.

3. Oil Sludge Formation in High-Temperature Environments:

   • Prolonged exposure of hydraulic oil to high temperatures can lead to oil sludge.
   • If the filtration system malfunctions or is not cleaned regularly, oil sludge may enter the hydraulic cylinder.

Solution:

1. Manufacturers should clean the hydraulic pipelines and tanks according to specifications to prevent impurities during installation.
2. Regularly filter and replace hydraulic oil to prevent excessive impurities from entering the hydraulic cylinder and damaging it.

III. Foreign Objects Entering from the External Environment:

1. Lack of Sealing in the Oil Tank:

   • Dust accumulation in the working environment may lead to dust entering the oil tank, causing an excessive amount of impurities in the hydraulic oil or deteriorating the hydraulic oil.

2. Improper Packaging during Transportation or Installation:

   • Lack of packaging for hydraulic pipelines, oil tanks, or valve blocks during transportation or installation can allow dust or foreign objects to enter the hydraulic system.

Solution:

1. Implement effective dust removal for the 315-ton hydraulic press and regularly assess the hydraulic system's sealing integrity.
2. Properly package equipment during transportation, paying special attention to hydraulic pipelines and pump stations to ensure protection from damage and prevent dust or impurities from entering. Maintain a clean and hygienic installation environment.