Hydraulic press is a kind of machine that uses oil-water balance control to carry out hydrostatic test on steel pipe. It is mainly composed of the following parts: steel pipe conveying equipment, water system, oil system and control system. The main feature of the hydraulic press is the large working stroke, which can apply working force to the workpiece during the full stroke, and it can more effectively forge large-section forgings without huge impact and noise, better labor conditions, and less environmental pollution. The basic operating principle of the hydraulic press is Pascal's law, which uses water as the working medium and works with static pressure transmission.

Roasting oil: damage the appearance (including nut threads and post threads) with an oxygen-acetylene flame, completely remove the oil stains on the appearance and infiltration into the substrate arrangement.

Grinding: Use a wire brush to polish the rust and impurities on the surface until the original color of the metal is leaked;

Cleaning: completely clean the polished appearance with absolute ethanol;

Apply mold release agent: 803 mold release agent is applied to the outer surface of the column thread, and it is dried for future use to facilitate later maintenance and disassembly;

Harmonious materials: The mixed share Harmony Fu Shilan polymer composite material 2211F strictly according to the requirements of the materials, stir evenly until there is no color difference;

Correcting the data: firstly modify a thin layer on the nut thread to ensure that the data is pressed into each microhole on the surface, and cover it strictly, and then modify the data evenly on this bottom layer, the scale is slightly larger than the wear scale; then Material is thinned on the column thread;

Equipment: Fast equipment split nut, the whole equipment tightening process can be controlled within 40 minutes.

In February 2018, during inspection of a steel plant in Shandong, it was found that the threads of the hydraulic press column and the corresponding nut threads were worn. Taking into account the long period of dismantling and returning to the factory or outsourcing machining and repair, high costs, and will seriously affect the continuous production of the enterprise, constituting an economic loss that the enterprise cannot accept. In response to this problem, we contacted our company and reached an online amendment cooperation with the company. Both sides have actively cooperated in this regard.

Hydraulic press is an important equipment normally produced by some iron and steel plants. If it is damaged during operation, it will stop and will seriously affect the normal production of the enterprise. It is difficult to complete the on-site correction by the traditional correction method for such problems. The company can only choose to use it as a waste replacement or subcontracting process for correction. The replacement part or subcontracting process is difficult to accept due to the high cost and time constraint. The selection of polymer composite materials has been revised on-site, which has saved valuable production time and low cost for the company, and has provided a new set of repair and protection skills for the company. When encountering similar problems again, the company can be autonomous at the top of the list deal with. The presentation of Fu Shilan's skills has improved the company's equipment management system, provided a method and basis for the company to quickly and efficiently correct various problems presented in the operation of the equipment, and laid an outstanding technical foundation for the progress of the company's equipment management level.