SS1 Quarterlight frames

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Post by scimjim » Tue Jun 11, 2019 7:25 pm

I have the prototype stainless frames but unfortunately the source has disappeared. They are two u sections welded together (and as mentioned previously they are compound curves, not flat like the GT/GTE/C) which will require many hours of work to look finished - definitely not a viable proposal for manufacture.


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Post by CNHSS1 » Tue Jun 11, 2019 8:12 pm

Scan originals, 3D print in black--last forever-literally, and once the program is perfect could be replicated anywhere in the world


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Post by Ford » Tue Jun 11, 2019 9:14 pm

I'll have a word with a guy I know that has a 3D printing company. Not sure what maximum dimension is feasible for him


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Post by philhoward » Tue Jun 11, 2019 9:18 pm

Doesn’t a certain Alfa-powered SE5 owner run a 3D printing company?...


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Post by CNHSS1 » Tue Jun 11, 2019 9:38 pm

philhoward wrote:
Tue Jun 11, 2019 9:18 pm
Doesn’t a certain Alfa-powered SE5 owner run a 3D printing company?...
Hes the man 8)


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Post by Ford » Tue Jun 18, 2019 7:07 pm

Only has 30x30cm machines. He is planning to do a 50x50cm which might work?


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Post by gtcse8 » Tue Jun 18, 2019 7:39 pm

Hi Jack

The discs were collected today with delivery tomorrow. :wink:

I`m a bit sceptical over 3D printing something like these window channels, they were made in steel originally because of steels properties, IF Reliant, OR more accurately Thyssen who I believe did the steelwork on the SS1, could have made the frames in plastic/grp/resin then I`m pretty sure Reliant would have done so. :?: :w


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Post by CNHSS1 » Tue Jun 18, 2019 7:50 pm

Hang on that was 30 years ago! Times and engineering has moved on a little since.

In an ideal world I'm sure everyone would like them replicated as per originals but the time, effort and costs in tooling alone is prohibitive, especially as a pair of frames could set you back same as an MOTd SS1!

Fabricated frames have been tried at least twice I know of from two differing sources and haven't been successful, so a process that involves minimal (relative) tooling time (the scanning and printing?) and in materials that are unlikely to decay like rusted steel ones, and at potentially lower cost per items, seems worth investigating. No it's not fag packet redneck engineering like most stuff that appears on scimitars, but to anyone that has windows hanging out of their small sports, I'm sure the notion would appeal.

But what do I know... :lol:
Nor do I have a small sports requiring them, so maybe I just full of good ideas :lol:


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Post by gtcse8 » Tue Jun 18, 2019 8:15 pm

Craig it was the structural rigidity I was concerned about. :?
I have been in contact with, and seen/used plastic injection building a little bit while I have been an engineer. :wink:

Steel was used for obvious reasons. :?:

I would also think that the possible costs involved would probably be more than a fabricated steel replacement ?. :!:


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Post by Jhdelta » Tue Jun 18, 2019 8:26 pm

To my knowledge both SLS and FDM rapid print solutions are not suitable to create the thin channel edges, machinend ally would be a better choice.



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Post by Ford » Tue Jun 18, 2019 8:49 pm

If we replace the original glass with clear plastic there would be more freedom for strengthening too?
Would not reusing glass make new metal ones more simple, or is that part not complicated?


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Post by philhoward » Tue Jun 18, 2019 9:03 pm

The first cars had Perspex (it’s a clear plastic, anyway) quarter lights...


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Post by CNHSS1 » Tue Jun 18, 2019 9:09 pm

The sections wouldn't need to be thin, the thin steel is folded back on itself and then predominantly filled will a rubber section with flocked centre. If the plastic section was made much thicker and the centre groove flocked, the strength would be vastly increased.

Whilst potentially cost prohibitive today, sintered printed metals are now commonplace in industry and will only come down in time.

I wasnt questioning yours or anyone elses engineering credentials but as current fabricated methods have come to zero, maybe we need to look elsewhere.

When I was involved a number of years ago I looked albeit relatively briefly, into the feasibility of remanufacturing the frames, and machining from solid was very much cost prohibitive, and also didnt have the 'tweakability' of the thin steel ones that's needed as thanks to Reliant, no two small sports frame fitments are the same.

I liked the idea of GRP frames, no corrosion, relatively simple to mould, but the tooling moulds need to be precision, likely machined metal moulds. Its likely that when moulded, the frames would then need to have had the glass groove machined into it, again not a single axis process.

My worry at the time was that the cost of investment for prototyping, testing, production tooling and then the costs of materials and fabrication, would just be too.much.

I guess as the cars get older and usuable/repairable frames more scarce, the necessity would justify a higher cost per unit but I cant see that being popular and may lead to more cars being broken up for parts which again is a shame


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Post by PeterG » Sat Dec 21, 2019 9:35 pm

Does anyone actually have any engineering drawings of the frames with accurate dimensions? I am wary to touch mine as they have rusted almost all the way through and if I drop the Windows they will not go back up!!! As I have said previously, I have found brass channel that might do the job if the sizes are close. I will also check who manufactures it as it might be worth asking if they could size a batch to suit. Getting the curve on the channel might be a challenge but soldering the various parts to form a frame is not too difficult.



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Post by PeterG » Sat Dec 21, 2019 9:56 pm

The attached files show the two channels in question and the dimensions. To me, they look as if they are the right style and shape but the dimensions would need to be compared. I have asked if a channel could be made to suit our needs. Please feel free to correct me if I am wrong.
Attachments
0709m__1E00001__.jpg
U-section_channel
0709m__1E00001__.jpg (8.62 KiB) Viewed 726 times
484-EDIT_edited-1 copy.jpg
H-section_channel
484-EDIT_edited-1 copy.jpg (20.51 KiB) Viewed 726 times



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