Common Faults Of Hydraulic Presses

During the operation of the metal extrusion hydraulic press, sometimes bolts may fall off and fall into the hydraulic cylinder, causing serious scratches on the plunger wall. After the problem occurs, traditional methods cannot achieve on-site repair at all, and can only be dismantled and transported to the manufacturer for repair welding processing or scrapping and replacement. Due to the lack of spare parts for replacement, it is difficult to control the time required to reproduce or return to the factory for maintenance. Prolonged downtime causes serious economic losses to the enterprise, while also requiring high processing or repair costs. In order to meet the requirements of continuous production for enterprises, it is necessary to find convenient, fast, simple and effective maintenance methods to solve the equipment problem, minimize the downtime of the enterprise, and reduce maintenance costs. Polymer composite materials can be used for on-site repair
Operation steps:
1. Use an oxygen acetylene flame to bake the scratched area (control the temperature and avoid surface annealing), and bake out the oil that has been permeating the metal surface for years until there are no sparks splashing.
2. Surface treat the scratched area with an angle grinder to a depth of at least 1 millimeter, and grind out grooves along the outer wall of the cylinder, preferably dovetail grooves. Scratches deepen the drilling at both ends, changing the stress situation.
3. Clean the surface with a degreased cotton dipped in acetone or anhydrous ethanol.
4. Apply evenly mixed repair materials to the scratched surface; The first layer should be thin, evenly and completely covering the scratched surface to ensure the best adhesion between the material and the metal surface. Then, apply the material to the entire repair area and repeatedly press to ensure that the material is filled tightly and reaches the required thickness, slightly higher than the surface of the outer wall of the cylinder.
5. It takes 24 hours for the material to fully achieve its various properties at 24 ℃. To save time, the temperature can be increased by a halogen tungsten lamp. For every 11 ℃ increase in temperature, the curing time will be shortened by half. The optimal curing temperature is 70 ℃.
6. After the material has solidified, use a fine grinding stone or scraper to repair and level the material that protrudes from the outer wall of the cylinder, and the construction is completed.