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Old 09-01-2022, 04:14 AM
Aireys Aireys is offline
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Default Advice please

Advice required please guys

Retaining nuts on low carbon steel Truck Body’s are to be welded inside the chassis sub frame. The Truck body’s are to be made in batches of 2000 with 90 retaining nuts on each body.
Can someone state a suitable welding process for this application and the reasons for selecting this process? Can you please explain how energy for welding is generated, and describe how the weld pool is protected from atmospheric contamination.

Many thanks
Stuart
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  #2  
Old 09-01-2022, 06:11 AM
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digger doug digger doug is offline
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Originally Posted by Aireys View Post
Advice required please guys

Retaining nuts on low carbon steel Truck Body’s are to be welded inside the chassis sub frame. The Truck body’s are to be made in batches of 2000 with 90 retaining nuts on each body.
Can someone state a suitable welding process for this application and the reasons for selecting this process? Can you please explain how energy for welding is generated, and describe how the weld pool is protected from atmospheric contamination.

Many thanks
Stuart
Are we doing your homework assignment ?
I want you to google "projection welding", and then report back here tomorrow.
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Old 09-01-2022, 06:30 AM
Aireys Aireys is offline
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Yeah Digger Doug. If you read my Bio on this website. i wrote that i am doing a degree in welding and fabrication.

What i didn't state in the first place was this question is under debate between myself and others on the course and i want advice from professionals or knowledgeable people on here to give me their opinion.
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Old 09-01-2022, 06:42 AM
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digger doug digger doug is offline
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Originally Posted by Aireys View Post
Yeah Digger Doug. If you read my Bio on this website. i wrote that i am doing a degree in welding and fabrication.

What i didn't state in the first place was this question is under debate between myself and others on the course and i want advice from professionals or knowledgeable people on here to give me their opinion.
You didn't ask for "advice" you asked for someone to write a book for you.

Lazy slacker.

and you still didn't look at my suggestion, just a rapid reply of pure BS.
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Old 09-01-2022, 06:54 AM
Aireys Aireys is offline
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Thanks for your help Doug. Nice one
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  #6  
Old 09-01-2022, 07:37 AM
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Ironman Ironman is offline
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Quote:
Originally Posted by Aireys View Post
Advice required please guys

Retaining nuts on low carbon steel Truck Body’s are to be welded inside the chassis sub frame. The Truck body’s are to be made in batches of 2000 with 90 retaining nuts on each body.
Can someone state a suitable welding process for this application and the reasons for selecting this process? Can you please explain how energy for welding is generated, and describe how the weld pool is protected from atmospheric contamination.

Many thanks
Stuart
Hi Stuart,
Usually when I do this sort of thing, I use a flange nut, which is a nut with a sort of washer built onto it, and mig weld the nut to the frame when it is in position. I would use this process because of low spatter. A weld berry stuck onto the internal threads of the nut can ruin your day.
And of course weld gas it the shielding agent.
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  #7  
Old 09-01-2022, 07:45 AM
Aireys Aireys is offline
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Thank you for your reply Ironman.

The answers i originally had were as follows...

(a) State a suitable welding process for this application.
Projection welding (RPW).

(b) List the reasons for selecting this process.
Projection welds have a longer life expectancy than spot welds, as it requires less heat and pressure during the welding process. The process allows for more than one weld to be completed at one time, thereby increasing production output. Projection welding equipment is easy to adjust to different parameters, so it can be used for a wide variety of parts and components. Projection welding uses highly automated equipment and multiple welds can be handled at one time.

(c) Explain how energy for welding is generated.
Both pieces become hot enough at the contact spots to fuse together as pressure is applied. Sometimes referred to as “energy directors”, projections are “dimples” or “bumps” that are pressed or machined into the material at the location where the weld is to be made. Typically, the projections are pressed into the thicker piece:

(d) Describe how the weld pool is protected from atmospheric contamination.
The flux develops a shielding gas for protection of the weld pool.

I was hoping for good advice on this forum from helpful people and not to be judged by my questions.
I hope my answers are in the right area as i am completely new to Welding and fabrication and wanted to reach out for assistance.
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  #8  
Old 09-01-2022, 08:44 AM
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Shade Tree Welder Shade Tree Welder is offline
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Aireys, apologies for our former members behavior.

I would look at possible using a Flow Drill with tapping.

https://www.flowdrill.com/usa_en/

Might not be the answer you are looking for, being a welding student. But it is a very likely the commercial solution. Also rivnuts are a common solution.

But if you have to use a welded solution. I would go with Ironman suggestion.
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  #9  
Old 09-01-2022, 08:44 PM
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Gentlemen, I moved this discussion over the the rare occurrence thread in OT.

Please leave this thread for the OP topic.

Thanks.
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  #10  
Old 09-01-2022, 11:54 PM
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Default Advice please

Oops, wrong post
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Last edited by toprecycler; 09-02-2022 at 12:00 AM. Reason: Oops, wrong post
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