Hydraulic press cylinder

How often should the oil seal of the hydraulic press cylinder be replaced, what hydraulic oil should be used, and where can hydraulic press cylinder seals be sold? Our factory is a professional manufacturer of hydraulic press cylinders, and also customizes flat sulfur press cylinders, heavy-duty truck cylinders, crane arm cylinders, surface grinder cylinders, and heavy-duty rod cylinders. For frequently asked questions from users, our factory will provide answers in this information.

Article Introduction:

• Basic Introduction
• Terminology Comparison
• Manufacturer Introduction
• reference price
• Maintenance and related issues

Basic Introduction to Hydraulic Press Cylinder

Hydraulic cylinder: The correct rolling process for the cylinder body of the hydraulic press includes: cutting the cylinder body, precision boring the cylinder body, and grinding the cylinder body. The rolling method used is: grinding the cylinder body - precision boring the cylinder body - rolling the cylinder body. The process consists of three parts, but the time comparison is: grinding the cylinder body for 1 meter takes about 1-2 days, and rolling the cylinder body for 1 meter takes about 10-30 minutes. Investment comparison: Grinding or milling machines (tens of thousands to millions), rolling knives (1000 to tens of thousands). After rolling, the surface roughness of the hole decreased from Ra3.2-6.3um before rolling to Ra0.4-0.8um, the surface hardness of the hole increased by about 30%, and the fatigue strength of the inner surface of the cylinder increased by 25%. If only considering the influence of the cylinder barrel, the service life of the oil cylinder can be increased by 2-3 times, and the efficiency of boring and rolling process is about 3 times higher than that of grinding process. In hydraulic systems, sometimes the inner layer of rubber hoses may peel off, causing the oil circuit to intermittently open and close, resulting in irregular movements of the hydraulic cylinder. Exclusion method: Replace the rubber hose. Surface protection of oil cylinder: During the disassembly and assembly process, it is necessary to provide safety protection for the oil cylinder to prevent objects from falling and hitting it, and welding slag from falling onto the surface, causing damage to the oil cylinder surface. During the propulsion process, it is necessary to prevent damaged pipe segments from falling and injuring, and any remaining slurry on the surface of the oil cylinder during leakage should be cleaned up in a timely manner. The difference between integral oil cylinder and split oil cylinder: The integral oil cylinder and split oil cylinder in the oil cylinder are two different types of oil cylinders, and they have significant differences. The integral oil cylinder is cast as a whole and is not prone to oil leakage and other problems; The split cylinder is welded twice, so if the welding is not handled properly, problems such as oil leakage and cylinder damage may occur. Therefore, it is evident that the answer to this question is to make a difference. In recent years, the machining process of oil cylinders has generally adopted rolling, which is a pressure finishing process that utilizes the cold plasticity characteristics of metals at room temperature. Rolling tools are used to apply a certain amount of pressure to the surface of the workpiece, causing plastic flow of the surface metal and filling it into the original residual low concave valleys, thereby reducing the surface roughness value of the workpiece. Due to the plastic deformation of the surface metal being rolled, the surface structure undergoes cold hardening and grain refinement, forming a dense fibrous structure and residual stress layer. This increases the hardness and strength, thereby improving the wear resistance, corrosion resistance, and fit of the workpiece surface. Rolling is a non cutting plastic machining method.

Comparison of terminology for hydraulic press cylinders

Chinese English Comparison of Terminology Related to Hydraulic Press Cylinder

• Rotary Abutment Motor, Rotary Hydraulic Motor
• Rotary knob
• Symbols for hydraulic and pneumatic components
• Non slam Check Butterfly Buffer Check Valve
• Zero leakage within zero position
• Fan: Fan
• Pressure relief valve
• Differential circuit

Introduction to hydraulic cylinder manufacturers

Our factory specializes in designing hydraulic press cylinders and also sells lifting ring hydraulic cylinders, boom hydraulic cylinders, shaft groove hydraulic cylinders, jacking hydraulic cylinders, and crane hydraulic cylinders. After years of hard work, our factory has established reliable cooperative relationships with users in industries such as glass paper mills, power supply equipment factories, sweater and yarn factories, dye chemical factories, printing and jacquard factories, and barrel factories.

Hydraulic cylinder reference price

The price of hydraulic press cylinders is determined by factors such as temperature requirements, frequency of use, thrust size, and system pressure. The selling price varies depending on the stroke range, and common brands of hydraulic press cylinders cost between 800/yuan and 5000/yuan.

Maintenance and related issues of hydraulic press cylinder

• How to control the hydraulic cylinder circuit with a one-way solenoid valve
  If your oil cylinder is single acting, you can use a one-way solenoid valve. For example, some hydraulic cylinders on lifting platforms use a one-way (two position three-way) support valve, which means that the oil cylinder extends by being pushed out by oil pressure and retracts by its own weight,
• Can the hydraulic oil in the hydraulic cylinder return to the oil tank
  Sure, there is a way, for example, first remove the hydraulic cylinder from the machine, and then connect the two pipes on the hydraulic cylinder, so that the piston rod of the hydraulic cylinder is completely retracted into the cylinder barrel. At this point, the piston has a bottom and there is almost no oil in the rear chamber. Then unscrew the joint on which end of the front chamber is close to the hydraulic station and put it in an empty bucket. Finally, insert the air pipe into the oil port of the rear chamber, open the air source, and the piston rod will run out, which will drain the hydraulic oil at that end of the piston rod. This method requires an air source on site. You can come up with your own way, using cows or cars to pull it, it's okay, haha.
• How to distinguish between good and bad hydraulic cylinders
  1. Cylinder diameter; Cylinder diameter and inner diameter size. 2. Diameter of piston rod; 3. Cylinder stroke; 4. Oil cylinder pressure; The working pressure of the oil cylinder is often calculated using the test pressure, which is lower than 16MPa multiplied by 1.5 and higher than 16 multiplied by 1.25. 5. Inlet and outlet diameters and thread parameters. 6. Is there a buffer; According to the working conditions, if the piston rod extends or contracts, it will affect the diameter of the oil cylinder; Cylinder diameter and inner diameter size. 2. Diameter of piston rod; 3. Cylinder stroke; 4. Oil cylinder pressure; The working pressure of the oil cylinder is often calculated using the test pressure, which is lower than 16MPa multiplied by 1.5 and higher than 16 multiplied by 1.255. The inlet and outlet diameters and thread parameters
• How is the hydraulic cylinder barrel processed?
  As the main component of hydraulic cylinders, mining unit supports, hydraulic supports, cannon barrels and other products, the quality of cylinder processing directly affects the service life and reliability of the entire product. The processing requirements for the cylinder barrel are high, with an inner surface roughness requirement of Ra0.4-0.8 μ m, and strict requirements for coaxiality and wear resistance. The basic characteristic of cylinder barrel is deep hole machining, which has always troubled machining personnel. Using rolling processing, due to the residual compressive stress left on the surface layer, it helps to close small cracks on the surface and hinders the propagation of erosion. Thereby improving the surface corrosion resistance and delaying the generation or expansion of fatigue cracks, thus enhancing the fatigue strength of the cylinder. By rolling forming, a layer of cold work is formed on the rolled surface