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Flat tube necking machine

A shrinking and flat tube technology, applied in the field of flat tube shrinking machines, can solve the problems of burning fins, product surface quality decline, flat tube surface collapse, etc., and achieve the effect of simple structure

Inactive Publication Date: 2015-09-09
ANHUI JINSANHUAN METAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the shrinkage is greater than 0.6mm, the surface of the flat tube will collapse seriously, which will lead to low brazing quality between the flat tube and the collector (leakage at the collapse point). , repeatedly entering the brazing furnace until the repair and pressure holding are qualified, but this process also brings a large number of unqualified products with reduced surface quality (such as excessive welding freezing point, burnt fins, deformation, etc.)

Method used

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  • Flat tube necking machine

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Embodiment Construction

[0010] In order to easily understand the technical means, creative features, goals and effects of the present invention, the present invention will be further described below in conjunction with specific illustrations.

[0011] like figure 1 As shown, a flat tube necking machine includes a machine 1, a necking punch 2 arranged on the machine 1, and a steel support pin 3 is also provided on the machine 1, and the steel support pin 3 has a support pin One end of 4 is placed between the shrinking punches 2.

[0012] Put the flat tube 5 cut to length on the shrinking machine, so that the support pin 4 of the steel support pin 3 is inserted into each micropore on the flat tube 5, and then the width is narrowed, so that in the process of punching and shrinking , the tube wall cannot collapse inward due to the limitation of the support pin 4, and the outside is a cold stamping die, so it can only be thickened. In this way, a smooth necking plane is obtained, which meets the flatnes...

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Abstract

The invention discloses a flat tube necking machine. The flat tube necking machine comprises a machine table and necking puncher pins arranged on the machine table. The machine table is further provided with a steel supporting needle. One end, provided with supporting needles, of the steel supporting needle is arranged between the necking puncher pins. The structure is simple, a flat tube which is cut in the fixed length is placed on the necking machine, the supporting needles of the steel supporting needle are inserted into micro holes of the flat tube, and width necking is carried out. In this way, in the punching necking process, due to the limitation on the pipe wall of the supporting needles, inward collapse cannot be carried out, the outer side is a cold punching forming mold, and only heading can be carried out. The flat necking surface is obtained, and the flatness requirement for brazing can be met.

Description

technical field [0001] The invention relates to a necking machine, in particular to a flat tube necking machine. Background technique [0002] The base size of the aluminum flat tube is at most 0.6mm larger than the shrinkage size, and if it is larger, the walls on both sides of the flat tube will collapse. Parallel flow condensers mostly use single-row flat tube brazing, so certain auxiliary tooling can be used for assembly and positioning, and the latest technology of double parallel-flow evaporators will be assembled with double or even more than one row of flat tubes Brazing on the same header, which requires accurate positioning between the flat tube and the header, while ensuring the quality of brazing. [0003] However, under the premise of not adding a large number of auxiliary tooling, the direct positioning and brazing of the necking part of the flat tube with a large necking (the base size is more than 0.6mm larger than the necking size) has become an effective w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D41/04
CPCB21D41/04
Inventor 陈青仇培
Owner ANHUI JINSANHUAN METAL SCI & TECH
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