The working process of pneumatic hydraulic tube expanding machine
Pneumatic hydraulic tube expander is a device that combines pneumatic and hydraulic technologies, mainly used for connecting pipes and tube sheets. It uses air pressure and hydraulic pressure to drive the expansion device, and expands the tube through internal pressure to firmly connect it with the tube plate. This type of equipment is widely used in the tube assembly process of heat exchangers, boilers, condensers, and other equipment.
The radiator expansion machine is used for connecting heat sinks and heat pipes. Use a high-pressure booster pump to pressurize the heat dissipation pipe, increasing the outer diameter of the heat dissipation pipe by 0.5-0.7mm to create an interference fit with the heat dissipation fins, tightly combining them with the heat dissipation pipe. Replaced the original welding process, greatly shortened the time and improved efficiency. The main workflow of the pneumatic hydraulic tube expander is as follows.
The driving part of pneumatic hydraulic tube expander usually uses air pressure as the power source. The air compressor provides a stable air source to drive the pneumatic pump. Compared with fully hydraulic equipment, pneumatic drive has advantages such as fast start-up, energy saving, and low noise.
The power comes from the pneumatic part, but the actual expansion process is achieved through hydraulic pressure. Pneumatic pumps convert air pressure into hydraulic pressure, pushing pistons or expansion rods to apply expansion force to pipes.
The working head of the tube expander is placed inside the tube through a guiding device, and the hydraulic system pushes the expansion rod or expansion device to generate a strong radial force inside the tube, causing the tube to undergo plastic deformation under the action of its internal expansion head, increasing the outer diameter and tightly fitting onto the hole wall of the tube plate.
After the tube is tightened into the hole of the tube plate, a strong mechanical connection is formed between the tube and the tube plate. At the same time, the expansion joint ensures a seal between the tube and the tube plate, avoiding the leakage of the medium.
The pneumatic hydraulic expansion machine has automatic control function, which can set the expansion pressure and stroke to ensure the consistency of the expansion joint. Compared to traditional mechanical expansion equipment, pneumatic hydraulic expansion machines are easy to operate, can quickly complete the expansion process, and improve work efficiency. The hydraulic system provides stable pressure output, making the tube expansion process more precise and ensuring good sealing and strength between the tube and the tube plate. Pneumatic hydraulic tube expanding machine can be applied to pipes and tube sheets of different diameters and materials, with a wide range of applications.
The use of pneumatic hydraulic systems can reduce energy consumption and is more environmentally friendly compared to traditional hydraulic equipment. The pneumatic system has fast response speed, flexible control, and relatively simple equipment maintenance. The quality of the expansion joint is good, and the stable pressure provided by the hydraulic system can ensure the uniformity and consistency of the expansion joint. In summary, the pneumatic hydraulic tube expanding machine, with its technical advantages of combining pneumatic and hydraulic, has achieved efficient and accurate tube and tube sheet expansion, and is widely used in the manufacturing of various pipelines and equipment.