METHOD OF MAKING WAVEGUIDE BEND

• US 3,672,202 A
• Filed: 09/15/1970
• Issued: 06/27/1972
• Est. Priority Date: 09/15/1970
• Status: Expired due to Term

• Current Assignee: Wayne Barber
• Original Assignee: Wayne Barber
• Inventors: Barber, Wayne
• Primary Examiner(s): Herbst, Richard J.
• Application Number:
  US05/072,279
• Time in Patent Office: 651 Days
• Field of Search: 29/600,601 113/116UT,116F 72/325,326,369,370 333/98BE,98R
• US Class Current: 72/369
• CPC Class Codes: H01P 1/022 in waveguides of polygonal cross-section H01P1/065 takes precedence
• CPC Class Codes: Y10T 29/49016 Antenna or wave energy "plumbing" making

Abstract

A method of forming an H-plane or E-plane bend in a straight, hollow, rectangular waveguide is described which permits a decrease in the '"'"''"'"''"'"''"'"'a'"'"''"'"''"'"''"'"' or '"'"''"'"''"'"''"'"'b'"'"''"'"''"'"''"'"' dimension in going around the bend. In the practice of the method, part of one wall of the waveguide is deformed by a die to cause the wall portion to be sheared from the adjacent walls and pressed into the waveguide. The portions of the waveguide walls extending outside the deformed wall are cut away. Triangular segments are removed from the waveguide to form the guide into three sections. The three sections are then folded together to make the bend.

Claims

1. The method of forming a hollow rectangular waveguide H-plane or E-plane bend of the type having a decreased dimension in going around the bend, comprising the steps of 1. forming access holes in the wall of a straight length of hollow rectangular waveguide, the access holes being opposite an intermediate portion of the opposite wall which is to be deformed, 2. inserting an arbor in the waveguide, the arbor having a die face shaped to the contour which the deformed wall is to assume, 3. supporting the arbor upon posts extending through the access holes, 4. driving a punch against the portion of the waveguide wall which is to be deformed to cause that wall portion to be sheared from the transverse walls and pressed into the waveguide against the die face of the arbor, 5. cutting V-notches into the waveguide to form a plurality of waveguide sections, the apices of the V-notches forming scores in the deformed wall, 6. removing portions of the transverse waveguide walls to cause those walls to conform to the contour of the deformed wall, and 7. bending the waveguide sections about the scores in the deformed wall to bring the sections together.

2. The method according to claim 1 wherein in step 5 two V-notches are cut into the waveguide to form three waveguide sections, and the score in the apex of each V-notch has a teardrop shaped cross-section.

3. supporting the arbor upon posts extending through the access holes,

4. driving a punch against the portion of the waveguide wall which is to be deformed to cause that wall portion to be sheared from the transverse walls and pressed into the waveguide against the die face of the arbor,

5. cutting V-notches into the waveguide to form a plurality of waveguide sections, the apices of the V-notches forming scores in the deformed wall,

6. removing portions of the transverse waveguide walls to cause those walls to conform to the contour of the deformed wall, and

7. bending the waveguide sections about the scores in the deformed wall to bring the sections together.