Questions tagged [welding]
Use this tag when the question deals with the process of making a weld. For questions about weld design or the use of welds, use the [welds].
74
questions
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1answer
45 views
welding pipes with an angled fillet weld
I am designing a tractor implement for harvesting root crops. Similar to this one here, but stronger construction with cutting discs in front of it to prevent weed jam. These images will help you ...
1
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1answer
52 views
When is a convex weld finish required?
In weld symbols one can specify the finish of the weld. In flush weld, for example, one needs to level the weld into a flat surface. I can imagine when this is needed: if something is required to rest ...
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0answers
11 views
ANSYS - How to extract reaction forces in the critical plan of the weld?
I work on ANSYS WORBENCH and I want to extract the reaction forces in the critical plane of the weld, note that weld is circular.
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0answers
32 views
Angled Nozzle on Pressure Vessel - Weld Preperation
I wonder if anyone can help!
I'm trying to model 3D geometry of nozzle to shell weld. I am having issues ascertaining correct bevel angle at a given point.
Surely the bevel angle would change due to ...
3
votes
1answer
360 views
Can Rotary Friction Welding be used to join metals and ceramics?
Is Rotary Friction Welding a good method to join cylinders of a metal (such as Ti alloy) and a ceramic (such as SiC).
I know that Diffusion bonding can be used in such cases. However, it has its own ...
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0answers
13 views
what kind of welding setup to mig weld high-temp stainless
In my initial foray into welding I am looking at welding some 300-series stainless tube, no thicker than 1/4" and more likely 1/8". I have not yet purchased a welding machine, and wanted to ...
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0answers
24 views
How is calcium and aluminium wire feeding different from each other?
How is Aluminum wire feeding different from that of Calcium wire feeding as far as the purpose is concerned also what I do not understand is what has wire feeding to do with the purpose and how are ...
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2answers
48 views
Can Sheet Metal Be Formed With Bends At Weld Joints?
I understand that a weld, if done properly, is stronger than the base metal. Does this mean that if you have a part that needs to be formed, the bend can be made along the weld? Or is the weld filler ...
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2answers
66 views
Quicker way to weld hexagonal nuts in honeycomb pattern
I am currently designed a structure that require hexagonal nuts to be placed side by side in honeycomb pattern, welded upon sheet. Other than doing it in old-fashioned way, is there any way/technique/...
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1answer
49 views
How effective are welding blankets?
I am a novice welder (D.I.Y).
I need to weld in a very sensitive area. It will be surrounded by PVC and other plastics withing about 30-50cm of where I have to weld.
I have an inverter arc welder, and ...
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0answers
15 views
Finite element welding simulation with commercial software? [closed]
I am looking forward some libraries/add-ons to perform welding simulation (thermomechanical coupling, steel alloys) using commercial software, like Ansys or Abaqus. My aim is to determine better ...
4
votes
1answer
646 views
Why is fillet weld assumed to be in a state of pure shear stress?
According to Building codes, when calculating the maximum load a fillet weld can take, one checks only that the stress in pure shear is below the maximum shear strength. We know that shear yielding ...
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2answers
69 views
Can wet welding be done in mineral oil?
I'm interested in knowing whether or not submerged welding can be done in fluids other than water, specifically mineral oil in this case. The reason I want to know is that I'm looking into designing ...
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2answers
705 views
Welding Carbon fibre
How do you weld carbon fibre to another piece of carbon fibre? If it can't be welded together what other solutions are there for connecting carbon fibre together?
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0answers
29 views
How to weld a copper flange with a Nickel alloy pipe?
I have a copper flange and I want to weld it to a nickel alloy pipe.
Normally, which welding technique is used to join these two parts?
Also what is the filler material to be used to weld a copper ...
2
votes
2answers
37 views
What treatment is necessary after welding carbon steel pipes?
When welding stainless steel pipes, the welds need some treatment (e.g. ball blasting and pickling). Is there anything equivalent for carbon steel (not stainless)? I'm looking at a tender document ...
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0answers
20 views
Is it possible to silver solder a reliable grounding connection to a stainless steel ultrasonic cleaner tank?
My ultrasonic cleaner has a stainless steel tank with a threaded grounding stud for fastening a mains earth wire. I tried to tighten nut that fastens the ground terminal to the stud, but the stud ...
4
votes
4answers
2k views
Is it possible to increase the heat output of a gas stove by connecting two gas supply canisters to it at the same time, and is it safe to do so?
Here's a typical outdoor gas stove:
It is fed by a low-pressure gas supply in the form of a camping cartridge or via an LPG cylinder connected to a low-pressure regulator (around 30mbar) like this ...
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2answers
274 views
Can I use a NPT fastened device to vacuum or 10^-2 Torr?
I am designing a flange to be use to maintain a pressure of 10-2 Torr for at least 3 months. I am using an o-ring seal from my (device) to the product weldment. I am looking for feedback on using NPT ...
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2answers
28 views
Electric Arc Furnace Steam Production
How much steam is emitted from an electric arc furnace in a unit of time? I have not been able to find any data on this which is strange considering the amount of water that is used to cool an ...
1
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1answer
455 views
What are the benefits of a digitally controlled TIG welder?
There are "analog" TIG welders where the parameters are directly controlled by rotary knobs and buttons. For example this one. Then there are "digital" ones where parameters are controlled by one ...
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2answers
103 views
High frequency TIG welding and Bluetooth or WIFI frequency
I need to work on a project where multiple objects need to exchange trough wireless protocol and they are near to High frequency TIG welding machine.
All objects works by pair (one emitter and one ...
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votes
1answer
195 views
What materials can be used for Brazing
I have trouble understanding the Brazing principle. What I know is that there are a couple of filler materials such as copper, silver, aluminim, etc....
What I remember from the past is that the ...
1
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1answer
37 views
Is it possible to spot weld three rather than two plates?
I have a situation where ideally, I would like to resistance spot weld three rather than the usual two plates together (individual plate thickness approximately 0.7mm). Is this at all possible? If not,...
1
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1answer
82 views
Laser beam welding
I would like to use a laser beam to weld small metal parts that are located within an air tight enclosure but want the laser head to be located outside the enclosure which would require the laser beam ...
0
votes
1answer
66 views
Plate thickness for repair of completely corroded web
The web of a H-section column has been completely corroded at the air-moisture interface with the concrete encasement leaving a hole in the web. The proposal is to break out the existing concrete and ...
0
votes
2answers
184 views
200A tig welder enough to weld 8mm thick steel flat bar/stainless steel sheet/tubing
I would like a tig welder. It has to be able to weld 8mm thick steel flat bar so we can fix the front gate if it breaks.
I also want to be able to do stainless and aluminium for projects.
It seems ...
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0answers
33 views
What is the smallest size of pipe to which I can Weld a 1 inch pipe Perpendicular to the Axis?
I would to know what is (or how to calculate) the size (dia) if the smallest pipe to which I can weld a 1 inch pipe from the side of the bigger pipe perpendicular to its axis (like a tee).
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1answer
3k views
Arc-welding 2mm thick steel at an angle without burning-through
I'm learning a bit of stick welding since I keep needing it for certain projects. Total beginner.
The latest thing I decided to make is a table similar to this one:
The material is 2mm thick ...
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0answers
33 views
Phase prediction by cct diagram
Can someone please help in finding out the phase proportion of each phase w.r.t time , cooling rate and temperature by using (mathematical model to predict phases from given cct diagram)
Leblond ...
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0answers
21 views
How to find phase proportion at equilibrium - from iron-carbon diagram - Leblond
{Equilibrium proportion P, this is the proportion which is reached at a constant temperature after an infinitely long time:P is also the austenite proportion in the case of extremely slow heating. It ...
0
votes
3answers
3k views
Stick welding inner corner
I'm having trouble welding the inner corners of my material. Welding material is sometimes deposited on either one side or both sides, but never really connecting the two parts.
Side/flat welds work ...
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1answer
394 views
Stainless steel wire mesh spot welded to a frame
Can anybody tell me how to make a similar welding job - that is to spot weld a thin stainless steel wire mesh to a stainless steel frame. What machine and technique should be used to accomplish this ...
3
votes
1answer
71 views
How to test Cross Wire Welds
What is the best way to test the weld strength of a cross wire weld? For example, a wire grid with .212 dia wire x .212 dia wire.
I cannot find any solid information online for testing cross wire ...
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4answers
61 views
small relatively inexpensive crack detection apparatus for bike shops
Is there a relatively inexpensive (let's say under $500US) crack-detection device and related mobile app that would be easy enough for a non-engineer/non-metallurgist to use to determine whether a ...
0
votes
1answer
350 views
What settings to set to weld aluminum with TIG?
I bought a Everlast 205 AC/DC and I am new to welding. I would like to experiment with aluminum welding but my electrode doesn't last very long. The arc-cone is pretty wide and I cannot establish a ...
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1answer
65 views
Recommendations on a rigid connection between materials
I am trying to construct a torsion pendulum/balance for a physics experiment but the research papers are always missing specifics on how the certain connections are made.
I am looking for ...
3
votes
1answer
2k views
Short circuit in welding
All I know about welding is it is a technique in which electrode is connected to one terminal and the gripper connected to workpiece is in connection with the other terminal. As current passes and ...
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2answers
794 views
What are the advantages of different types of groove in welding?
In welding, we have different types of grooves like V-shaped groove, U-shaped groove, Double V, Double U, J and Double J. What is the advantage of each kind over the other?
2
votes
2answers
652 views
Fillet weld strength calculation
I have 2 plates that are fillet welded to each other. How can I determinate the max force the weld can take before it cracks?
The plates are only welded on one side because the other side is not ...
2
votes
1answer
745 views
Arc welder? Cheap welding device for chainmail/chainmail jewelry
I'm hoping this is the correct StackExchange for this question/request for advice.
I'm looking to buy a welder to introduce me a little to welding, my main use-case right now is the hobby projects I ...
1
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0answers
67 views
Welding rods: Why are some DC and other AC also?
The last time I welded was too many years ago in engineering school but a friend and I recently bought a welding machine and have set about trying to learn how to weld.
In researching what welding ...
2
votes
1answer
61 views
Best way to manufacture stainless steel apparatus?
Shown in the images below I have designed a small stainless steel apparatus with accompanying hollow metal cylinders ontop.
I'm looking into larger quantity production and simply CNC'ing these would ...
0
votes
2answers
225 views
Can I keep hardened steel cool with ice while welding?
I would like to weld a piece of hardened steel but i don't want to ruin the treatment on the tip of the piece.
Can i put some ice in the middle of the shaft so the heat generated from the welding (...
0
votes
1answer
124 views
Welding Aluminum to Medium Carbon Steel [closed]
I have a table flat surface made from aluminum, and the table legs are made from medium carbon steel. What are 3 welding processes that could be used to weld the legs to the flat surface.
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3answers
94 views
Heating up Tool Steel with a welder
I'm a newbie of electricity and I would like to know if a piece of tool steel connected to both positive and ground pole of a welder tend to heat up red hot.
If yes, at wich amperage?
There are some ...
3
votes
1answer
2k views
Actual amount of reinforcement gained by adding gusset to welded steel tube construction
This question bothers me for quite a while and is about bicycle frame construction, specifically a BMX frame and even more specifically it's front triangle.
It is a heavy duty frame by definition, and ...
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vote
1answer
52 views
Is there any option other than a gas welder
I want to repair a dent in a piece of cast iron with brass. I want to fill the site with brass.
For some reason, I want to do it by myself. I can buy an instrument for this work in a limited budget(...
3
votes
5answers
5k views
Welding and risk of electric shock
I would like to learn to weld (stick welding) for my own purposes (mostly for small repairs and building simple metal constructions). So far I'm trying to educate myself by reading and watching ...
2
votes
2answers
203 views
Types of welding (Shaft)
I am currently working on a prototype wire winch. I encountered some difficulties when trying to join the shaft and the cable drum.
Indeed the joint must be a welding, so I presume no keys are needed.
...