Can Electromagnetic Welding Tables Improve Welding Accuracy and Efficiency?

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Discussion Overview

The discussion revolves around the feasibility of converting a welding table into an electromagnet to improve the accuracy and efficiency of welding processes, particularly in keeping steel cut nails in place during spot welding. Participants explore various implications, technical challenges, and alternative methods related to this concept.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant inquires about the possibility of turning a 20 square foot welding table into an electromagnet to prevent nails from shifting during welding, questioning the implications of grounding the table.
  • Another participant suggests that using an electromagnet should not pose problems if it is isolated from the work, referencing the use of permanent magnets as temporary clamps in welding.
  • Concerns are raised about the practicality of magnetizing the workspace, with one participant warning that it could lead to unwanted sticking of various objects to the table.
  • A request is made for specifications for an electromagnet suitable for a 20 square foot welding table, considering the operational duration required.
  • One participant proposes exploring electric discharge welding as an alternative method, describing its instant nature and providing a link to a resource they have used.
  • Another participant expresses skepticism about the practicality of placing an electromagnet beneath a steel sheet, suggesting that achieving the desired outcome may not be straightforward and that the solution may not be as simple as anticipated.
  • A participant clarifies their setup, noting the specific type of welder and the materials involved, which may affect the feasibility of using an electromagnet.
  • Concerns are raised about the potential interference of the magnetic field with the weld arc, although the specific outcomes of this interference are not detailed.

Areas of Agreement / Disagreement

Participants express a range of opinions, with some supporting the idea of using an electromagnet while others highlight potential complications and alternative methods. The discussion remains unresolved, with no consensus on the feasibility or practicality of the proposed solution.

Contextual Notes

Participants note various assumptions and conditions, such as the grounding of the welding table and the specific materials being used, which may influence the effectiveness of the electromagnet concept. The discussion also highlights the need for further exploration of the implications of magnetic fields on welding processes.

bigcarbonfoot
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Is it possible to turn my 20 square foot welding table into an elctromagnet? I weld steel cut nails into artwork. The nails lay flat on the steel table, but the welding process sometimes "shifts" the nail out of position during the spot weld. This error causes the process to be shut down, and then phisically remove the welded nail. I thought that if the table were a large electromagnet, the steel nails would stay in place as I weld. Considering that the welding table is grounded to the welding machine, does this complicate the matter?
 
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I don't see any problem, as long as the electromagnet is isolated from your work. Permanent magnets are already used as temporary clamps for welding, so there should be no problems using a different source of magnetism.
 
Possible shure, but magnetizing your mechanical workspace may cause frustration for later projects. Every fricking object will stick to the table.

You could rather magnetize your nails only.
 
electromagnet for this application would need to be on for an hour at a time. Could someone propose some specs for a 20 s.f. welding table?
 
You might want to look into electric discharge welding. This method of welding is instant. You attach one terminal to the (conductive) work piece, and the other terminal to your cut nail. Then, wearing goggles, touch the parts together and wait for the shower of sparks to settle. Done.

I have used the http://www.dcccorporation.com/hotspot2.html" for this purpose.

Otto
 
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I assume what you want to happen is place an electromagnet beneath a sheet of steel. Regardless of what anyone says, this is going to prove problematic. I won't go into the "whys", just trust me when I tell you that the "practical" solution you are looking for is not "obvious". Can you achieve what you want? YES, ...can you do it as easily as putting a charged coil under your plate steel top, NO. Any way, if this continues, the real physics pros will define your new table-top, I am just telling you the simple solution you are looking for does not exist.

Fish
 
fish, thanks for your response. I'm using a wire feed welder (grounded to the welding table). My welding table is actually an 18 gage steel door. So the working distance between the proposed electromagnets and the stock that I am welding would be approx 1/16" (18 gage) sheet metal. On a similar application, one of my other welding tables is approx 3/8''cast steel.
 

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