The development of pipe bending machines in my country has generally gone through the following stages: The first stage involved mechanical structures; domestic production began in the 1950s and 1960s. These early machines relied on cams or large gear drives to actuate the slide-block die for the bending process. As one might imagine, these machines suffered from low efficiency, high noise levels, and significant limitations regarding bending force; nevertheless, they remained in manufacture and use in my country for many years. The second stage marked the application of hydraulic technology; in the early 1980s, as my country gradually opened up, advanced foreign manufacturing methods were introduced, and hydraulic technology was incorporated into pipe bending machines.

Today, the experts at Huameng Machinery would like to discuss the key considerations for draining and refilling the hydraulic system of a pipe bending machine:

Regularly draining water and sediment from the hydraulic oil tank is crucial for removing impurities. Additionally, the oil within the entire hydraulic system must be drained periodically to completely eliminate impurities, oxidized hydraulic fluid, and other harmful substances. Once this is done, clean hydraulic fluid must be refilled into the system.

High-quality hydraulic fluid contains various additives designed to prevent oil deterioration and system component clogging; however, the effectiveness of these additives cannot be guaranteed over prolonged use, necessitating regular replacement. Beyond draining and refilling the oil, periodically replacing the filter is another essential measure for maintaining the cleanliness of the hydraulic system.

Introduction to the Hydraulic System of Pipe Bending Machines

The primary power for a hydraulic pipe bending machine is supplied by its hydraulic system. The system typically features a hydraulic manifold (or valve block) and four or five sets of solenoid valves, with each set controlling a specific operational unit. These generally include clamping, mandrel retraction, auxiliary pushing, and bending; since each of these actions operates independently, they require separate solenoid valve controls. Pressure-holding valve assembly: These valves are utilized in the clamping system. During the tube bending process, the material is subjected to expansion forces; without a pressure-holding valve to maintain stable hydraulic pressure, the clamp might fail to hold the workpiece securely, leading to issues such as wrinkling or deformation.

Zhangjiagang Huameng Machinery Technology Co., Ltd. specializes in the manufacture of various bending machines, including CNC, hydraulic, and fully automatic models. Adhering to the business philosophy of "Customer First and Integrity-Based Operations," we sincerely welcome both new and existing clients to visit us, and our entire team is dedicated to providing you with comprehensive service.