Method for manufacturing a near net-shape mold

• US 20040128016A1
• Filed: 04/04/2003
• Published: 07/01/2004
• Est. Priority Date: 03/22/2001
• Status: Abandoned Application

• Current Assignee: David H. Stewart
• Original Assignee: David H. Stewart
• Inventors: Stewart, David H.
• Application Number:
  US10/221,964
• Publication Number:
  US 20040128016A1
• Time in Patent Office: Days
• US Class Current: 700/159
• CPC Class Codes: G05B 19/4099 Surface or curve machining, making 3D objects, e.g. desktop manufacturing
• CPC Class Codes: G05B 2219/49019 Machine 3-D slices, to build 3-D model, stratified object manufacturing SOM
• CPC Class Codes: Y02P 80/40 Minimising material used in manufacturing processes

Abstract

A method for manufacturing a near net-shape mold from a weldable material, including creating a computer model of a mold portion (30,32), analytically sectioning the computer model of the mold portion into a plurality of mold zones (22), generating mold zone cutting paths for a cutting machine to follow, cutting the weldable material into plurality of mold zones, generating surface profile cutting paths for a cutting machine to follow, machining surface profiles into the mold zones, assembling the mold zones by placing the mold zones side-by-side, generating welding paths for an electron beam welding a machine to follow, and welding the mold zones together.

Claims

1. A method for manufacturing a near net-shape part from a plate material, comprising the steps of:

cuffing the plate material into a plurality of zones, each zone having a length, a width, and a depth;

machining a surface profile at least partially into the depth and at least partially across the width of at least one of the plurality of zones;

assembling the plurality of zones by placing the zones side-by-side; and

fastening the plurality of zones together.

2. The method of claim 1, wherein the step of fastening includes electron beam welding.

3. The method of claim 2, wherein at least a portion of the weld formed by the electron beam welding penetrates approximately to a depth of 100 mm.

4. The method of claim 1, wherein the step of machining includes machining a channel through the width of each of more than one of the plurality of zones, and the step of assembling includes aligning the channels of adjacent zones.

5. The method of claim 1, further including, after the step of fastening, the step of deflashing the channel by forcing an abrasive-filled fluid through the channel.

6. The method of claim 1, wherein the step of machining includes using an abrasive waterjet cutter.

7. The method of claim 6, wherein the step of machining includes machining a surface profile into each of more than one of the plurality of zones.

8. The method of claim 7, wherein the surface profiles differ from one another.

9. A method for manufacturing a near net-shape part from a plate material, comprising the steps of:

creating a computer model of a part;

analytically sectioning the computer model of the part into a plurality of part zones;

generating at least one part zone cutting path for a first cutting machine to follow;

cutting the plate material into the plurality of part zones, each part zone having a length, a width, and a depth;

generating at least one surface profile cutting path for a second cutting machine to follow;

machining at least one surface profile at least partially into the depth and at least partially across the width of at least one of the plurality of part zones;

assembling the plurality of part zones by placing the part zones side-by-side;

generating at least one welding path for a welding machine to follow; and

fastening the plurality of part zones together.

10. The method of claim 9, wherein the step of creating includes designing channels into the computer model of the part.

11. The method of claim 10, wherein a heat transfer analysis is used to aid in the design of the channels.

12. The method of claim 9, further including the step of generating channel cutting paths for a third cutting machine to follow, and the step of machining includes machining a channel through the width of each of more than one of the plurality of part zones, and the step of assembling includes aligning the channels of adjacent part zones.

13. The method of claim 9, wherein the first cutting machine and the second cutting machine are the same machine.

14. A method for manufacturing a near net-shape mold portion from a plurality of weldable material pieces, comprising:

machining a first surface profile into one of the plurality of weldable material pieces and a second surface profile into a second of the plurality of weldable material pieces; and

after machining, electron beam welding the plurality of weldable material pieces together.

15. The method of claim 14, including creating the plurality of weldable material pieces by cutting a weldable material.

16. A mold portion manufactured from at least two mold portion zones electron beam welded together using the method of claim 14.

17. A method for manufacturing a near net-shape mold portion from at least one material, comprising:

creating a computer model of a mold portion;

analytically sectioning the computer model of the mold portion into a plurality of mold portion zones;

analytically generating at least one surface profiling path; and

analytically generating at least one fastening path.

18. The method of claim 17, including;

assembling a plurality of mold portion zones composed of the at least one material;

machining at least one surface profile into at least one of the plurality of mold portion zones following the analytically generated at least one surface profiling path;

fastening at least two of the plurality of mold portion zones together following the analytically generated at least one fastening path.

19. The method of claim 18, wherein the at least two of the plurality of mold portion zones are electron beam welded together.

20. The method of claim 18, wherein the at least two of the plurality of mold portion zones are brazed together.

21. The method of claim 18, wherein the at least two of the plurality of mold portion zones are diffusion bonded together.

22. The method of claim 18, including

analytically generating at least one mold portion zone cutting path for a cutting machine to follow;

and

cutting the at least one material into at least one of the plurality of mold portion zones following the analytically generated at least one mold portion zone cutting path.

23. The method of claim 18, wherein each of the plurality of mold portion zones has a depth and a width, and the at least one surface profile is machined at least partially into the depth and at least partially across the width of at least one of the plurality of mold portion zones.

24. The method of claim 18, wherein more than one surface profiling path is analytically generated and each of the more than one surface profiling paths is machined into at least one of the plurality of mold portion zones.

25. A mold portion manufactured from at least two mold portion zones electron beam welded together using the method of claim 19.