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].

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13
votes
10answers
14k views

Affixing a thermocouple to a surface

I'm looking for advice on how to attach a thermocouple to a metal surface in a fashion that's relatively temperature resistant (more-so than) glue. I've got some very fine gauge wire on hand to make ...
9
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0answers
234 views

What type of ultrasonic transducer would be suitable for ultrasonic welding? [closed]

Project background: I am working on a project where i need to weld plastic using ultrasonic transducers. Problem: Since I'm still learning engineering, I have a hard time figuring out what all the ...
8
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1answer
237 views

Weldability of Pure Tin

The site states that Tin cannot be welded, but after I made some research, I discovered that tin, when alloyed with copper or used as a protective coating for steel, can be welded. My question is why ...
6
votes
1answer
4k views

Schaeffler, De Long, and WRC welding diagrams - which steels can be used?

I am working on a simple program that would help welder to count how much ferrite, austenite etc. there is in weld. I am focusing on stainless steel. I have decided to use 3 graphs: Schaeffler, De ...
6
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1answer
2k views

What is the process for qualifying a weld between structural steel and stainless steel?

In the US, typical structural steel welding is covered by either AWS D1.1 or AWS D1.5 (bridges). Both of these codes cover a wide range of carbon steels. AWS has a separate code for welding stainless ...
5
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4answers
681 views

Can you get quality welds from a multiple metal wire feed welder, or do you need separate units for steel and aluminum?

The job site requires welding both aluminum and steel (each to themselves only) for different areas of the project. The contractor has a dual purpose wire feed welder (aluminum and steel) but I am ...
4
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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 ...
4
votes
1answer
3k views

Strongest brazing materials for titanium?

What are the strongest brazing materials for titanium? The main materials I would like to use would be copper or silver, in which case I would like to ask which would form a stronger bond with ...
4
votes
2answers
948 views

Penetration depth and weld deposition rate in Welding

What factors affect the penetration depth and weld deposition rate in arc welding? How does polarity affect the penetration depth and weld deposition rate? My lecturer said that penetration depth is ...
3
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1answer
1k 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 ...
3
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5answers
3k 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 ...
3
votes
2answers
99 views

Aluminum for an Ejection Seat Replica

I love ejection seats and the flying contraptions they usually reside in. In fact, I like them so much that I want to make my own, despite my profound lack of training and inexperience with ...
3
votes
1answer
109 views

What materials or techniques can I use to reduce this electrical effect when building spotwelding tables?

I have been experimenting with building various support tables around press-type spot-welders. These are relatively simple fixures; think of a tabletop with legs under it and devices like sliding ...
3
votes
1answer
48 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 ...
3
votes
1answer
1k 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 ...
3
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2answers
2k views

Strength of Welded Joints

When calculating the factor of safety for a fillet weld that is loaded in shear what should be the maximum allowable stress? Some books suggest using the distortion energy (Ssy = 0.577Sy for the ...
2
votes
2answers
27 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 ...
2
votes
3answers
6k views

What type is miter joint - Welding

Is miter joint in welding - butt joint or corner joint ? My example includes 45 degrees miter (90 degrees) angle on two SHS (Square Hollow Sections) - 50x50x3 [mm] Working with EN/ISO norms regarding ...
2
votes
1answer
551 views

How to join 2 mm stainless steel welding rods without a TIG welder

I have to build an egg tray. The material used for such trays is 2 mm stainless steel welding rods. When I queried nearby workshops they said a TIG welder is needed to weld such material and it is ...
2
votes
2answers
457 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
2answers
156 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. ...
2
votes
1answer
109 views

Plugging a 25A device (Welder) on 10A house plug

I would like to plug a 25A welder on a 10A house plug. I understand that it will not accept full power or the circuit breaker would switch. However, my question is if I may run under some lower power ...
2
votes
1answer
327 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 ...
2
votes
1answer
59 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 ...
1
vote
1answer
590 views

Thoriated tungsten TIG electrodes were in use 45 years ago.What were their specific use and problems?

Some TIG electrodes in use in the early 1970's were marked Thoriated Tungsten and Non-Thoriated Tungsten. What were the specific purposes or properties for these TIG welding electrodes?
1
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2answers
33 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 ...
1
vote
2answers
42 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 ...
1
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2answers
70 views

Pouring copper onto another copper block

When pouring copper onto another copper block and I want to have a good solid welding of the poured copper onto the block, do I need to use a flux? Or, if the block is freshly cleaned and free of most ...
1
vote
2answers
18 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 ...
1
vote
2answers
24 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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2answers
371 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?
1
vote
1answer
28 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
vote
1answer
74 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 ...
1
vote
1answer
51 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(...
1
vote
1answer
242 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 ...
1
vote
3answers
70 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 ...
1
vote
2answers
99 views

How does Electric arc welding compared to gas welding?

While focusing on Quality and strength of welded joints produced but both methods..
1
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2answers
1k views

Advice on suitability of corner joints in welded frame

I'm designing a frame for supporting some agricultural equipment that will be composed of welded square hollow section members. The top of the frame will be a rectangle of SHS members, with four ...
1
vote
2answers
663 views

Brazing Zinc-Aluminum Alloy to Steel

I have an electrical connector made of zinc-aluminum alloy (exact mixture unknown) that I would like to braze to a steel tube. Can this be done, what kind of material(s) would work for this ...
1
vote
0answers
25 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 ...
1
vote
0answers
14 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 ...
1
vote
1answer
93 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 ...
1
vote
0answers
26 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).
1
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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 ...
1
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0answers
65 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 ...
1
vote
0answers
55 views

how to calculate the speed ratio (Rotational speed to advancing speed) in friction stir welding

I am a student and I work in the friction stir welding of a hardened aluminium alloy 7075-T6, and I want to confirm about this information before I put it in the article. I found in the literature ...
0
votes
3answers
51 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
2answers
42 views

Resistance spot welding multiple metal thinknesses

I have a question for all experienced in manufacturing of steel products; Is it possible, and or workable to resistance spot weld dissimilar metal thicknesses together? for example, 1.5-2mm thick ...
0
votes
1answer
241 views

Can I mig weld to my skateboard truck? How can I test if it's weldable?

I have this skateboard truck for my off-road skateboard. I want to mig weld a piece of aluminum to it to mount a motor. How would I test if it is something I can weld to with a MIG welder? I think it ...
0
votes
1answer
48 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 ...