What is the function of the tube expanding part of the vertical tube expanding machine?

The vertical tube expander is an essential component for expanding the heat exchanger tube. It enters the copper tube through the vertical tube expander to force the copper tube to expand, so that the copper tube and the heat exchanger fins of the outer jacket are tightly combined to enhance the heat exchange rate of the heat exchanger. The structure of the vertical tube expander includes an expansion head mechanism and an expansion head reciprocating drive mechanism; the expansion head mechanism includes an expansion head and an expansion rod; the expansion head is hollow and a limit step is set in the hollow, and several equally divided radial through gaps are set at the front end of the expansion head shell; the expansion rod includes a rod body and a second rod body, a rod body is provided with a support section and a boss, and the tail end of the first rod body is threadedly connected with the front end of the second rod body.

When the tube is expanded, the expansion head is sleeved outside the expansion rod. When it moves axially to one end, it is limited by the front end of the two rods. When it moves to the other end, the boss of one rod blocks the expansion head limit step. At the same time, the support section enters the front end of the expansion head to open the radial opening gap; the expansion head drive mechanism connects the tail ends of the two rods of the expansion head mechanism and moves back and forth. The expansion head mechanism in the above-mentioned vertical tube expander structure has the advantages of simple use and convenient disassembly and assembly.