Non-contraction tube expanding equipment

Abstract

The invention relates to non-contraction tube expanding equipment, comprising a tube expander for expanding a copper tube and a port expender for expending the port of the expanded copper tube. The non-contraction tube expanding equipment is characterized in that the tube expander comprises a lower rack for clamping a workpiece and an upper rack for expanding the workpiece, wherein an expansion rod for expanding the tube is arranged in the upper rack; the port expander comprises a lower rack for fixing the workpiece and an upper rack for expanding the port of the workpiece, a movable beam and a port expanding device are arranged in the upper rack, wherein the port expanding device is fixed below the movable beam which is connected with a pressing device. The non-contraction tube expanding equipment of the invention can avoid the quality problems that the traditional tube expander generates a breach on the copper tube or does not expand the port during expanding the tube, the qualification rate of expansion on the tube with small tube diameter of phi 5mm reaches over 99%, and the invention is suitable for expanding the copper tube with the tube diameter of phi 4 to 9.52 mm.

Description

technical field [0001] The invention relates to a non-shrinkage tube expansion device, in particular to a device suitable for coil tube expansion with a small diameter. Background technique [0002] The tube expander is a commonly used mechanical equipment. It is often used to expand the coil of the mechanical equipment in the manufacture of heat exchangers, boilers, air conditioners and other mechanical equipment, so that it can be fixed and connected with other structures. [0003] The traditional tube expander can complete the tube expansion and flaring process on the same equipment, such as figure 1 As shown, the manufacturing process of the heat exchanger is as follows: First, put the copper tube on the fin to obtain the workpiece 6, and then adjust the position of the movable beam 3, the number of the expansion rod 1 and the expansion device 2 and the clips according to the specification parameters of the product. Hold the position of the door panel 7, etc., put the c...

AI Technical Summary

Problems solved by technology

However, there are the following problems in the design of the traditional tube expander: 1. When the expansion head is not aligned with the copper tube, when the expansion head goes down, it will cause the copper tube to flang, and the result is a crack at the end of the copper tube

2. When the copper tube is relatively thin, the rigidity of the copper tube is poor, and the shrinkage rate of the copper tube after expanding the tube is inconsistent, resulting in a crack when the copper tube expands, or the mouth cannot be expanded.

3. The traditional tube expander usually performs the second expansion when the first expansion tube is close to the bottom. Since the bottom of the copper tube is generally only subjected to axial pressure, this makes the bottom of the copper tube easy to deform. The smaller the diameter, the better the copper tube. It is easy to bend and deform, and the bending and deformation of copper tubes will cause poor heat dissipation effect of the heat exchanger. In order to maintain environmental protection and take into account the effect of air conditioning and refrigeration, the volume of the new heat exchanger is getting smaller and smaller, so the traditional tube expander cannot meet the needs of the industry. actual demand on

At the same time, due to the existence of various defects and deformations in the product after tube expansion, the overall pass rate of the product is relatively low, resulting in low production efficiency, a large number of consumables, and it is difficult to guarantee product quality

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