Bending method of air conditioning condenser and press brake

Abstract

The invention relates to a bending method of an air conditioning condenser. The uppermost layer of a multi-layer condenser blade is bended firstly, and then the second layer of the condenser blade and the third layer of the condenser blade are bended successively. The bending method has the advantages that the required total bending moment is small, the relative pressure between the condenser blade and a bend mold and among layer and layer of the condenser blade is also small, and the condenser blade can not be rewound easily. When the condenser blade is bended, the horizontal moving power, the horizontal moving speed and the linear velocity during the rotation of the lowest layer of the condenser blades on the bend molds are increased. Therefore, the condenser blade can not be hindered by the resistance in the horizontal direction in bending, and the occurrence of rewinding phenomena can be prevented.

Description

technical field [0001] The invention relates to a bending method and a bending machine for an air conditioner condenser. Background technique [0002] Air-conditioning condensers generally have one to three layers. Conventional bending is formed by one-time bending of multi-layer condenser tubes. Specifically, there are two bending methods: bending plate rotation and bending mold rotation. For the bending method of bending plate, see figure 1 , figure 2 , the multi-layer condensation pipe 1 is supported by the clamping frame 2 and positioned under the bending die 3, the bending end is fixed by the bending plate 4 on the bending arm 6 through the shaft 5, and its bending preparation state is as follows figure 1 shown. After the bending starts, the bending plate 4 swings, so that the condenser sheet is formed along the arc of the bending die, and finally the bending plate is turned back to complete the bending, such as figure 2 shown. [0003] For the turning and bendin...

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Problems solved by technology

[0004] The above bending methods have the following common disadvantages: because the two-layer or multi-layer condenser sheet 1 is bent at the same time, the bending section coefficient is the superposition of the bending section coefficient of the two-layer or multi-layer condenser sheet, and the required bending moment is large

[0006] In the above-mentioned second bending method and bending machine, there is a certain hysteresis force between the condenser piece 1 and the bending mold 3 during bending, so the fins on the condenser piece 1 are also easy to rewind.

[0007] In addition, the surface of the bending die 3 of the existing bending machine is smooth (mostly chrome-plated to improve the smooth surface) or knurled, and the fins of the air-conditioning condenser are not supported on the smooth surface, which is easy to cause the phenomenon of flipping

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