CAD Drawings Needed

[wyrman]

I'm trying to get some hinges made for my arch. I have quite a few pics from one of the members here that is pretty detailed.
The guy I talked to said a CAD drawing would be a lot easier for him.
Can/will anyone do this? I am willing to pay for the service.
This is one example of the pics.

 

[Pyrojodge]

Sure, I could make that up pretty easy....
Does he want it imperial or metric? Metric is easier for me but I can make either work.

 

[Stee6043]

Hmmmm....

I'm thinking providing a "cad drawing" would not be sufficient for your fab guy?? When he says "cad drawing" he likely means an engineered design put into cad. The drawing would need to call out material, finish, weld specifications for the hinge barrel, etc and so on.

Is there no way you can find an existing hinge out there? Or contact a company that does hinged arches and ask what hinge they use?

I'd be worried about trusting my arch to a quickly drafted sketch. But it's your money, your boat!

 

[wyrman]

Sure, I could make that up pretty easy....
Does he want it imperial or metric? Metric is easier for me but I can make either work.

I would think Imperial, but I could always convert it.
Maybe CAD isn't what I'm thinking here. I need a drawing of the hinge assemblies so a guy at a machine shop can make them. I have pics with all hinge parts and measurements shown by a tape measure.
I would have thought that would be good enough, but I guess not.

 

[wyrman]

Hmmmm....

I'm thinking providing a "cad drawing" would not be sufficient for your fab guy?? When he says "cad drawing" he likely means an engineered design put into cad. The drawing would need to call out material, finish, weld specifications for the hinge barrel, etc and so on.

Is there no way you can find an existing hinge out there? Or contact a company that does hinged arches and ask what hinge they use?

I'd be worried about trusting my arch to a quickly drafted sketch. But it's your money, your boat!

I already know the material and finish. This is mainly dimensions.

 

[TNT8808]

I'm trying to get some hinges made for my arch. I have quite a few pics from one of the members here that is pretty detailed.
The guy I talked to said a CAD drawing would be a lot easier for him.
Can/will anyone do this? I am willing to pay for the service.
This is one example of the pics.

There was a guy on here local to me from Spring Lake, I think his name was Marc Blondin, that had his done. Maybe you can find him on here. Pretty sure he had his made.

 

[wyrman]

I could do the job complete but I am swamped thru Jan and Feb and most of March right now.
If interested send me the pics and I can quote them with fellow boater discount included

I really want to get it done before March. Once I get them installed, I'm going to install hydraulics to raise and lower it.
Thank you though.

 

[Stee6043]

You may want to give some thought to reinforcing the floor where you plan to anchor the rams (if you haven't already). I had a ram pull away from the floor on my 340 in rough seas. Not rotted, just too much force. A real PITA to address both at the time (dangling arch) and after returning home...

Those rams take quite a lot of load in sporty sea states. More than your typical floor can handle when spread over a 3x3ish area...

 

[AeroNick]

From the photo you post this is an easy weld job. I would size the plate 1/8" - 1/4", find the SS pipe in the size required and if someone has this same fitting get the centerline dimension of the pipe to the end of the bracket and weld accordingly. This is the exact way this bracket was made. Look closely to the welded pipe. I am an aerospace engineer and have done and seen many brackets done this way. A billet bracket one piece is obviously better but it's overkill for the installation required not to mention costly.

 

[wyrman]

From the photo you post this is an easy weld job. I would size the plate 1/8" - 1/4", find the SS pipe in the size required and if someone has this same fitting get the centerline dimension of the pipe to the end of the bracket and weld accordingly. This is the exact way this bracket was made. Look closely to the welded pipe. I am an aerospace engineer and have done and seen many brackets done this way. A billet bracket one piece is obviously better but it's overkill for the installation required not to mention costly.

That's my exact thinking as well, I don't have the tools or skil to weld stainless.
Plus I went to our local metal yard, and he said the round piping is made from solid stock milled out, normal round piping doesn't come that thick according to him.
I have a guy that works at a machine shop, but he's really dragging his feet, and apparently needs a drawing.
I'm about ready to move on from him.

 

[wyrman]

You may want to give some thought to reinforcing the floor where you plan to anchor the rams (if you haven't already). I had a ram pull away from the floor on my 340 in rough seas. Not rotted, just too much force. A real PITA to address both at the time (dangling arch) and after returning home...

Those rams take quite a lot of load in sporty sea states. More than your typical floor can handle when spread over a 3x3ish area...

I'll make sure it's a good install, plus the arch will be pinned in place.

 

[stephenm27]

You may want to give some thought to reinforcing the floor where you plan to anchor the rams (if you haven't already). I had a ram pull away from the floor on my 340 in rough seas. Not rotted, just too much force. A real PITA to address both at the time (dangling arch) and after returning home...

Those rams take quite a lot of load in sporty sea states. More than your typical floor can handle when spread over a 3x3ish area...

I’ll offer some clarification here as my hinged arch is serving as a inspiration/model for wyrman’s project...

The hinge design used incorporates a 3/8” pin that carries the arch load while it’s in the upright position. As a result, the hydraulic actuators and their mounts are “unloaded” much of the time. Even so, the (my) mounts are reinforced with aluminum plate stock sandwiching each side of their respective fiberglass attachment points.

We do trailer with the arch in the down position (i.e. load carried by the actuators) and as a result I keep a close eye on potential mount fatigue but 4 years on, I’ve detected no issues. Thankfully, going down the road on a trailer should be less stressful than even moderate seas...

 

[Chris-380]

There was a guy on here local to me from Spring Lake, I think his name was Marc Blondin, that had his done. Maybe you can find him on here. Pretty sure he had his made.

He is on FB, there is a group, search for
“sea ray sundancer 38”

 

[wyrman]

I have things figured out finally.
I talked to one of the welders at work, and he's going to make them. He does work at home, and he said this wouldn't be any problem.