Process for manufacturing an injector body

Patent metadata

Field	Value
Publication number	US-9611824-B2
Application number	US-201514624651-A
Country	US
Kind code	B2
Filing date	Feb 18, 2015
Priority date	Feb 18, 2015
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

A process for manufacturing an injector body includes a) machining a metal blank to desired outer dimensions of the injector body; b) machining the metal blank along a first axis to define a spray hole within the metal blank; and c) machining the metal blank along a second axis to define an internal cavity in fluid communication with the spray hole.

First claim

I claim:

1. A process for manufacturing an injector body, the process comprising:
machining a metal blank to desired outer dimensions of the injector body;
machining the metal blank along a first axis to define a spray hole within the metal blank, after machining the metal blank to the desired outer dimensions of the injector body; and
machining the metal blank along a second axis to define an internal cavity in fluid communication with the spray hole, after machining the metal blank along the first axis.

2. The process of claim 1 , wherein a depth of machining the metal blank along the first axis is greater than a final depth of the spray hole.

3. The process of claim 1 , wherein machining a metal blank to desired outer dimensions of the injector body further includes machining a bottom wall of the metal blank so as to locate the spray hole in the bottom wall of the metal blank.

4. The process of claim 1 , wherein the first axis and the second axis subtend an angle of about 90 degrees to 180 degrees therebetween.

5. The process of claim 1 , wherein the second axis is a longitudinal axis of the injector body.

6. The process of claim 1 , wherein the internal cavity is configured to include:
an internal bore distally located from the spray hole and configured to receive a needle therein;
a fuel gallery located below the internal bore; and
a sac region extending between the fuel gallery and the spray hole.

7. The process of claim 6 further including predetermining a depth of machining the spray hole before machining the metal blank along the first axis so that the spray hole is configured to open up and be disposed in fluid communication with the sac region obtained from machining the metal blank along the second axis.

8. The process of claim 7 , wherein a diameter of the spray hole is less than or equal to a diameter of the sac region.

9. The process of claim 1 , wherein machining the metal blank along the first axis includes performing at least one of Electric Discharge Machining (EDM) and laser drilling.

10. The process of claim 1 , wherein machining the metal blank to desired outer dimensions includes performing rough machining and finishing on the metal blank to the desired outer dimensions of the injector body.

11. The process of claim 1 , wherein machining the metal blank along the second axis includes performing rough machining and finishing at least a portion of the metal blank to define the internal cavity of the injector body.

12. A process for forming laterally disposed holes that are in fluid communication with one another within a component, the process including:
machining the component in a first axis to define a blind first hole, wherein a depth of machining the component in the first axis is greater than a final depth of the first hole; and
machining the component in a second axis, after machining the component in the first axis, to define a second hole in lateral relation to the first hole, wherein machining the component in the second axis is configured to open up and dispose the blind first hole in fluid communication with the second hole.

13. The process of claim 12 , wherein a diameter of the first hole is lesser than a diameter of the second hole.

14. The process of claim 12 , wherein the first axis and the second axis subtend an angle of about 90 degrees to 180 degrees therebetween.

15. The process of claim 12 , wherein machining the component in the second axis includes performing at least one of Electric Discharge Machining (EDM) and laser drilling.

Assignees

• Caterpillar Inc

Inventors

• Gami Rahul N

Classifications

• F02M61/1846

  Dimensional characteristics of discharge orifices · CPC title

• F02M2200/8069

  involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation · CPC title

• F02M61/168 Primary

  Assembling; Disassembling; Manufacturing; Adjusting · CPC title

• F02M61/18

  Injection nozzles, e.g. having valve seats; {Details of valve member seated ends, not otherwise provided for} · CPC title