PROCESS FOR THE CONNECTION BY SETTING OF COLLECTORS ON WATER-BOXES OF HEAT EXCHANGERS

• US 3,793,701 A
• Filed: 12/01/1970
• Issued: 02/26/1974
• Est. Priority Date: 12/04/1969
• Status: Expired due to Term

• Current Assignee: Andre Chartet
• Original Assignee: Andre Chartet
• Inventors: Chartet, Andre
• Primary Examiner(s): Moon, Charlie T.
• Application Number:
  US05/094,237
• Time in Patent Office: 1,183 Days
• Field of Search: 29/421M,516,157.3 165/132,134,158X 285/47X
• US Class Current: 29/419.2
• CPC Class Codes: B21D 26/14 applying magnetic forces
• CPC Class Codes: B21D 53/08 of both metal tubes and sheet metal connecting tubes in openings B21D39/06
• CPC Class Codes: F28D 1/053 the conduits being straight
• CPC Class Codes: F28F 2275/064 by induction welding or by using microwaves
• CPC Class Codes: F28F 9/0226 with resilient gaskets
• CPC Class Codes: Y10T 29/49803 Magnetically shaping
• CPC Class Codes: Y10T 29/49927 Hollow body is axially joined cup or tube

Abstract

The process for the connection by crimping of collectors on water-boxes of heat exchangers is characterized in that parts of the collector and the water-box are surrounded by an electrically conductive metallic belt which is then submitted to at least one high electromagnetic pulse.

Claims

1. A method for joining together two sections each having external flanges of substantially rectangular shape, comprising the steps of:

positioning the two sections with their external flanges in engagement;

disposing around said flanges an annular plastically deformable magnetically responsive metal ring approximating the crosssectional contour of the said flanges;

disposing at least one substantially rectangular resilient electrically conductive metal collar in surrounding relation to said annular distortable ring; and

connecting said at least one metal collar to a pulse power generator whereby said collar is energized thus magneto forming said ring while resiliently deforming a suitable portion of said collar whereby the ring will be uniformly deformed onto said flanges.

2. A method according to claim 1 comprising the further step on providing ribs on at least the external flange of one of said two sections.

3. A method according to claim 1 wherein said annular distortable ring is provided by fitting an extension on one of the two sections.

4. A method according to claim 1 wherein said annular distortable ring is provided by fitting an independent metal belt around said flanges between the same and said metal collar.

5. A method according to claim 1 comprising the further step of adjusting the shape of said metal collar at suitable portions thereof.