This portable tube expander for copper tubes is specially designed for the expansion and connection of copper pipes in heat exchangers, air conditioners, refrigeration and other similar equipment. It features light weight, easy operation, stable performance and high expansion efficiency, which can effectively ensure the tightness and firmness between the copper tube and the tube sheet. The machine adopts reliable structure and durable components, making it suitable for on-site construction, assembly line production and after-sales maintenance. During operation, it runs smoothly with low noise, and can meet the standard requirements of tube expansion for various refrigeration and heat exchange products. It is an ideal and practical tool for pipe