Title:
METHOD OF SEALING TUBE INTO HOLE OF TUBULAR PLATE
Document Type and Number:
Japanese Patent JPS52142356
Kind Code:
A
Abstract:
The pressure of the hydraulic fluid which is used for the expansion and pressing of the tube (8) into contact with the wall of the hole is increased to a level at which the expansion of the tube and of the wall of the hole which occurs is such that, after relief of the pressure, the tube is permanently gripped by the wall of the hole by virtue of the positive difference in the unhindered elastic recovery of the tube and of the wall of the hole. The method can be used, in particular, in the production of heat exchangers. Since it is possible to set the required expansion pressure precisely, it is also possible to achieve the desired prestressing of the tube (8) in the hole precisely.
Inventors:
HERUBERUTO KURITSUPUSU
MIROSURAFU PODORUSUKII
MIROSURAFU PODORUSUKII
Application Number:
JP1878577A
Publication Date:
November 28, 1977
Filing Date:
February 24, 1977
Export Citation:
Assignee:
BALCKE DUERR AG
International Classes:
B21D39/08; A61K31/335; A61P29/00; B21D39/06; B21D39/20; B21D53/06; C07D313/12; F28F9/16; (IPC1-7): B21D41/02; F28F9/16
Previous Patent: JPS52142355
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