Invention prototype - help please with bent half tube

In summary: You can use exhaust header tubing pre-bent 90 or 180 degrees and then cut carefully with a bandsaw. While you show no dimensions, as long as it is less than 4 or 5 inch diameter, it should be fairly common. Some possible suppliers would be:http://secure.chassisshop.com/categories/6202/http://www.mandrel-bends.com/catalog/mandrel-bends-34/?osCsid=8891f790ee301685fa7aee2f667d22a9http://www.cachassisworks.com/c-146-j-bends.aspxhttp://www.speedwaymot
  • #1
moegilla
1
0
Invention prototype -- help please with bent half tube...

Hi all,
I am in the prototype phase of an invention and I need part that I can't get made and was looking for a few ideas.

2v10oll.png


As you can see the part is double-curved 16 gauge sheet metal. I brought it to a sheet metal shop and the guy told me it would cost an arm and a leg for 1, let alone the 4 I need.
I started thinking I could find a 90 degree elbow of some sort and cut it in half.

Any ideas?
 
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  • #2
You are correct. You can use exhaust header tubing pre-bent 90 or 180 degrees and then cut carefully with a bandsaw. While you show no dimensions, as long as it is less than 4 or 5 inch diameter, it should be fairly common. Some possible suppliers would be:
http://secure.chassisshop.com/categories/6202/
http://www.mandrel-bends.com/catalog/mandrel-bends-34/?osCsid=8891f790ee301685fa7aee2f667d22a9 [Broken]
http://www.cachassisworks.com/c-146-j-bends.aspx
http://www.speedwaymotors.com/Street-Rod-Exhaust-Tubing-Combo-Bends-Kits.html
I hope this helps.
 
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  • #3
Could you have someone with a mandrel bender just bend your choice of tube and have a water jet cut the tube? With a fixture and program for the water jet you could duplicate the 4 parts pretty close. I have no idea how much they would charge for shop time on a water jet though. If you made a jig I suppose you could cut the tube with a band saw but that leaves allot of room for a screw up and inconsistency.

Does the part have to be metal? If you could use fiberglass or some other composite you could make a mold pretty easy from a 90. That way you could also make any kind of mounting flanges if you need them as well. This would be the cheapest and easiest route. If it needs some heat protection I wonder how a few coats of a ceramic coating like air cure cerakote would work on the composite.
 

1. What is an invention prototype?

An invention prototype is a preliminary model or design of a new invention. It is typically created to demonstrate the functionality and potential of the invention, and to gather feedback for further development.

2. Why is a prototype important for inventors?

A prototype allows inventors to test and refine their ideas before investing time and resources into a full-scale production. It also helps them to identify any flaws or improvements that can be made to the design.

3. How can a prototype be helpful in the patent process?

A prototype is often required as part of the patent application process, as it provides a tangible representation of the invention and helps to prove its uniqueness and functionality. It can also help to strengthen the inventor's case in case of any legal disputes.

4. Can I create a prototype myself or do I need professional help?

It depends on the complexity of your invention and your own skills and resources. Some inventors may be able to create a prototype on their own, while others may benefit from seeking professional help from engineers, designers, or prototyping companies.

5. How much does it cost to create a prototype?

The cost of creating a prototype can vary greatly depending on the complexity of the invention, materials used, and whether you choose to create it yourself or seek professional help. It is important to research and budget carefully, and consider the potential return on investment in the long run.

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