Vertical tube expanding machine

Abstract

The invention relates to a vertical tube expanding machine, which comprises a base, a rack, a motive power seat, an opening expanding seat and a demolding seat, wherein an expanding rod is arranged on the motive power seat, the expanding rod passes through a plurality of support plates and is fixed and supported by the support plates, the rack is a portal rack, mutually parallel linear guide rails are respectively arranged on two front side surfaces of the portal rack, mutually parallel inner side guide rails are respectively arranged on the two inner side surfaces of the rack, the force transmission frame is placed in the rack, in addition, the position of the force transmission frame is limited on the inner side guide rails of the rack, a force transmission frame motive power mechanism drives the force transmission frame to vertically move along the inner side guide rails of the rack, the side edge of the upper part of the force transmission frame fixes the motive power seat, both ends of the motive power seat are respectively provided with screw rod chain wheels, inner holes of the screw rod chain wheels are provided with guide grooves, two parallel upper screw rods are respectively sheathed into two screw rod chain wheel holes in a penetrating way, an upper screw rod driving device is arranged on the motive power seat and drives the screw rod chain wheels to rotate, the lower ends of the upper screw rods are connected with the opening expanding seat, lower screw rods and a lower screw rod driving device are arranged on a base arranged under the demolding seat, the upper ends of the lower screw rods are sheathed with lower screw rod screw nuts, and the lower screw rod screw nuts are fixedly arranged on the demolding seat.

Description

technical field [0001] The invention relates to a vertical tube expander. Background technique [0002] The tube expander is used to expand the diameter of many heat exchanger tubes placed in the heat sink, so that they can be closely combined with the heat sink to avoid loosening, increase the thermal conductivity of the heat exchanger, and expand the ends of the tubes. Mouth and flanging, in order to facilitate the next process. [0003] The existing ordinary vertical tube expander has low production efficiency and a low degree of automation. Every time the product model is changed, it is necessary to re-adjust the position and clamp the stopper of the workpiece, which is very troublesome, the workload is heavy, and the accuracy cannot be guaranteed. At the same time, the heat exchanger tubes will shrink to a certain extent during the expansion joint, and there are still differences in the shrinkage of each heat exchanger tube, resulting in uneven ends of the heat exchang...

AI Technical Summary

Problems solved by technology

[0003] The existing ordinary vertical tube expander has low production efficiency and a low degree of automation. Every time the product model is changed, it is necessary to re-adjust the positioning and clamping the stopper of the workpiece, which is very troublesome, the workload is heavy, and the accuracy cannot be guaranteed.

At the same time, the heat exchanger tubes will shrink to a certain extent during the expansion joint, and there are still differences in the shrinkage of each heat exchanger tube, resulting in uneven ends of the heat exchange tubes, a large waste of raw materials, and a large amount of time spent on loading and unloading workpieces. Machine maneuvering time, low work efficiency

[0004] The existing vertical tube expander with a high degree of automation includes a frame, a power base, a flaring base and an ejection base. The expansion rod is installed on the power base, and the expansion rod passes through multiple support plates and is fixedly supported by the support plates. The power seat is generally directly driven by the oil cylinder installed on the frame. The stability of the whole power mechanism is poor, the anti-eccentric load capacity is weak, and the workpiece is easily deformed during the tube expansion process.

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