Methods and systems for dimensional inspection of compensated hardware
View Patent ↗A manufacturing method is adapted for materials that are susceptible to deformation during the manufacturing process, such as composite parts that change shape during curing. The method includes modifying a part design to compensate for changes in the shape of the part that occur during a curing phase of the manufacturing process. A manufacturing mold is created according to the modified part design, then a part is formed in the mold and cured in the mold. While the part is still in the mold after the curing phase, the part is finished according to the modified part design wherein excess material is removed and apertures are created. While the part is still in the mold after the finishing phase, the finished part is inspected using automated inspection equipment to confirm that the finished part conforms to the modified part design.
1. A method for forming parts comprising:
forming a part in a manufacturing mold, the shape of the mold reflecting a modified part design that compensates for changes in the shape of the part that occur after the part is formed and removed from the mold, such that the formed part conforms to a target part design after it is removed from the mold and is in a relaxed position, wherein the part is a composite part constructed at least in part of reinforcing fiber and resin; and
while the part is in the mold after being formed in the mold—
finishing the part according to the modified part design, and
inspecting the part using automated inspection equipment to confirm that the finished part conforms to the modified part design.
2. The method of claim 1 , the step of finishing the part including—
removing excess material from the part according to the modified part design, and
creating apertures in the part according to the modified part design.
3. The method of claim 2 , the step of finishing the part further including shaping one or more edges of the part with a router according to the modified part design.
4. The method of claim 2 , the step of inspecting the part further comprising using automated inspection equipment to confirm that apertures, contours and a periphery of the part conform to the modified part design.
5. The method of claim 4 , the step of inspecting the part further comprising using the automated inspection equipment to capture one or more images of the part in the mold and analyzing the one or more images to confirm that the apertures, contours and periphery of the part conform to the modified part design.
6. The method of claim 1 , the step of forming the part in the manufacturing mold including combining the reinforcing fiber and the resin and placing the combined fiber and resin in the mold.
7. The method of claim 6 , the step of forming the part including curing the resin after the reinforcing fiber and the resin are placed in the mold.
8. The method of claim 7 , the step of curing the resin including heating the fiber and resin to a temperature of at least 200° C.
9. The method of claim 8 , the step of curing the resin further including subjecting the fiber and resin mixture to a pressure of between 50 and 200 psi.
10. The method of claim 1 , the modified part design compensating for changes in the shape of the part that result from part spring-in occurring when the part is cured during the step of forming the part in the manufacturing mold.
11. The method of claim 1 , further comprising creating the modified part design using computer software to adjust a target part design.
12. The method of claim 11 , further comprising using the computer software to perform finite element analysis.
13. The method of claim 1 , further comprising creating the modified part design using a manual process of trial and error.
14. A method of manufacturing a composite part, the method comprising:
creating a design for a composite part, the design including aperture definitions, surface contours and a periphery definition;
modifying the part design to generate a modified part design that compensates for changes in the shape of the part that occur after the part is formed and removed from a manufacturing mold, such that the formed part conforms to a target part design after it is removed from the mold and is in a relaxed position;
creating a manufacturing mold such that the shape of the mold reflects the modified part design;
forming the composite part on the mold by placing a composite ingredient mixture in the mold, the composite ingredient mixture including carbon fibers and a resin;
curing the part by heating the part to a temperature of at least 200° C. and allowing the part to cool to room temperature;
while the composite part is in the mold after curing—
removing excess material from the part according to the modified part design,
shaping one or more edges of the part with a router according to the modified part design,
creating apertures in the part according to the modified part design, and
inspecting the part using automated inspection equipment to confirm that the apertures, surface contours, and a periphery of the part conform to the modified part design; and
removing the composite part from the manufacturing tool.
15. The method of claim 14 , the step of inspecting the part further comprising using the automated inspection equipment to capture one or more images of the part on the mold and analyzing the one or more images to confirm that the apertures, surface contours and periphery of the part conform to the modified part design.
16. The method of claim 14 , further comprising modifying the part design using computer software to adjust a target part design using finite element analysis.
17. The method of claim 15 , further comprising modifying the part design using a manual process of trial and error.
18. A method for forming parts comprising:
forming a part in a manufacturing mold, the shape of the mold reflecting a modified part design that compensates for changes in the shape of the part that occur after the part is formed and removed from the mold, such that the formed part conforms to a target part design after it is removed from the mold and is in a relaxed position; and
while the part is in the mold after being formed in the mold
finishing the part according to the modified part design, including:
removing excess material from the part according to the modified part design, and
creating apertures in the part according to the modified part design, and
inspecting the part using automated inspection equipment to confirm that the finished part conforms to the modified part design.
19. A method for forming parts comprising:
forming a part in a manufacturing mold, the shape of the mold reflecting a modified part design that compensates for changes in the shape of the part that occur after the part is formed and removed from the mold, such that the formed part conforms to a target part design after it is removed from the mold and is in a relaxed position; and
while the part is in the mold after being formed in the mold—
finishing the part according to the modified part design, and
inspecting the part using automated inspection equipment to confirm that the finished part conforms to the modified part design,
further comprising creating the modified part design using computer software to perform finite element analysis to adjust the target part design.