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Tube punching and collaring system, device and method

Inactive Publication Date: 2008-07-10
DAGAN MOSHE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]Generally speaking, a collar is examined by the similarity to a cylindrical shape, i.e., the similar a collar to a cylinder, the better is the quality of the collar, since a substantially cylindrical collar facilitates brazing of tubes on said collar.

Problems solved by technology

The result is good but the process is slow and expensive due to tooling wear.
The result of this process is good in production rate and tooling cost, but does not bring quality collar: the collar is conical and thus, does not assure brazing strength.

Method used

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  • Tube punching and collaring system, device and method
  • Tube punching and collaring system, device and method
  • Tube punching and collaring system, device and method

Examples

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Embodiment Construction

[0012]The present invention relates to a machine that combines a highly efficient punching method with a system and / or device that provides quality collar.

[0013]Generally speaking, a collar is examined by the similarity to a cylindrical shape, i.e., the similar a collar to a cylinder, the better is the quality of the collar, since a substantially cylindrical collar facilitates brazing of tubes on said collar.

[0014]It is to be understood that the term “punching a hole into a tube” or grammatical variations thereof, refer to a method wherein the direction of the punching is from the inner side of the tube to the outer side of the tube.

[0015]According to an embodiment of the invention, the present invention provides a method for punching at least one hole in a tube comprising the steps of: providing a system comprising a punch and a mold, placing the tube on the system such that the tube extends along a system axis, the punch is located within the tube and the mold is located outside o...

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Abstract

A tube punching system for punching at least one hole into a tube, said system comprising: a punch, an external mold and a counter die. The mold and punch are positioned relative to each other such that the mold exerts a counterforce onto the tube when the hole is punched; and wherein the mold subsequently forms a collar as a result of the force applied by punch against the tube.

Description

FIELD OF THE INVENTION[0001]The invention relates to punching and collaring technology of tubes. More specifically, the present invention relates to tubes that may be used in solar heating, air conditioning and fluid conduction systems.BACKGROUND OF THE INVENTION[0002]Tubes that have a plurality of holes punched therein are in widespread usage as manifolds in many products such as solar heating panels.[0003]In the art, several systems are in use enabling punching of holes into the wall of a tube.[0004]In the art, an acceptable direction of punching is from the inner side of the tube to the outer side of the tube. Such a type of punching is hereinafter referred to as “punching a hole into a tube”.[0005]However, in order to use such tubes as manifolds, the punching of holes into the tubes should preferably generate a collar around each hole to facilitate brazing of other tubes onto the tube manifolds.[0006]The structure of the collar determines the quality of the brazing interface bet...

Claims

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Application Information

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IPC IPC(8): B21D31/02
CPCB21D28/28
Inventor DAGAN, MOSHE
Owner DAGAN MOSHE
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