Custom rims needed
12-18-07 | 05:33 AM
#26
Thread Starter
Idea Investor
Joined: Nov 2007
Posts: 33
Likes: 0
From: Vancouver, BC
"To tell you the truth I am a tad reluctant to the idea of making the rim to a metal shop that have no hands on experience with the rims. They wouldn't know anything about vertical, radial and lateral loads, rim geometry, wheel dynamics, etc.
"They would not have the technology to weld it perfectly and definitely they would not be able to center it."
First off, you don't go to a metal fabrication shop expecting them to calculate loads, dynamics, etc. That's engineering. That's the design work that comes up when you say the wheel "was designed". If it hasn't been done, it needs to be done before you can fab anything. If you don't have those loads, then you can't calculate a reasonable cross section for the wheel. You also would need those loads to figure out what alloys are acceptable
It looks to me like to build the detail on the right, you'd need to have a custom extrusion, then roll it into a circle and weld it. But I don't know if that shape could be successfully welded. For just a few samples for test purposes, eliminate the hole and make that a solid shape. Then both rims can be made by rolling bar stock, welding, heat treating if necessary, and then machining. But someone's got to tell the shop what kind of bar stock, what kind of heat treating, and what dimensions to machine it to.
"They would not have the technology to weld it perfectly and definitely they would not be able to center it."
First off, you don't go to a metal fabrication shop expecting them to calculate loads, dynamics, etc. That's engineering. That's the design work that comes up when you say the wheel "was designed". If it hasn't been done, it needs to be done before you can fab anything. If you don't have those loads, then you can't calculate a reasonable cross section for the wheel. You also would need those loads to figure out what alloys are acceptable
It looks to me like to build the detail on the right, you'd need to have a custom extrusion, then roll it into a circle and weld it. But I don't know if that shape could be successfully welded. For just a few samples for test purposes, eliminate the hole and make that a solid shape. Then both rims can be made by rolling bar stock, welding, heat treating if necessary, and then machining. But someone's got to tell the shop what kind of bar stock, what kind of heat treating, and what dimensions to machine it to.
Hey StephenH,
Duly noted! Thank you for your pointers. Any more considerations?
Best regards,
SR
12-18-07 | 08:27 AM
#27
Senior Member
Joined: Mar 2006
Posts: 2,018
Likes: 1
Since your rim is not standard it is not clear any maker would have experience. I think people in the aircraft business are used to new and innovative projects.
If there is a good technical/engineering school near you drop buy and ask them. BTW, my guess is that most manufacturers get allot of people, some whom are nuts, who want custom stuff done until they hear the price.
contact people who have built monocycles, or Mr. Didi Senft
If there is a good technical/engineering school near you drop buy and ask them. BTW, my guess is that most manufacturers get allot of people, some whom are nuts, who want custom stuff done until they hear the price.
contact people who have built monocycles, or Mr. Didi Senft
Last edited by geo8rge; 12-18-07 at 08:36 AM.
12-18-07 | 09:20 AM
#28
The Improbable Bulk
Joined: Jul 2005
Posts: 8,379
Likes: 7
From: Wilkes-Barre, PA
Bikes: Many
To my untrained eye, the component on the right looks a lot like a standard box rim.
If so, would it be feasible to get an "off the shelf" rim of standard diameter with custom drilling, and then redesign the other component to facilitate any changes in dimensions?
I know you are basically reinventing the wheel here, but that doesn't mean you have to reinvent every component of the wheel.
If so, would it be feasible to get an "off the shelf" rim of standard diameter with custom drilling, and then redesign the other component to facilitate any changes in dimensions?
I know you are basically reinventing the wheel here, but that doesn't mean you have to reinvent every component of the wheel.
12-19-07 | 02:47 AM
#29
Thread Starter
Idea Investor
Joined: Nov 2007
Posts: 33
Likes: 0
From: Vancouver, BC
Since your rim is not standard it is not clear any maker would have experience. I think people in the aircraft business are used to new and innovative projects.
If there is a good technical/engineering school near you drop buy and ask them. BTW, my guess is that most manufacturers get allot of people, some whom are nuts, who want custom stuff done until they hear the price.
contact people who have built monocycles, or Mr. Didi Senft
If there is a good technical/engineering school near you drop buy and ask them. BTW, my guess is that most manufacturers get allot of people, some whom are nuts, who want custom stuff done until they hear the price.
contact people who have built monocycles, or Mr. Didi Senft
Last edited by SysResearch; 12-26-07 at 02:10 AM.
