Engineering Stack Exchange
Engineering Stack Exchange

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].

Welding is the process of physically combining two pieces together. This is usually accomplished by melting the components, but can also be done mechanically in the friction stir process.

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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 the thermocouples and specialized spot welder…
Dan
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What type of ultrasonic transducer would be suitable for ultrasonic welding?

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 factors are in order to choose the right…
vaid
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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 pure Tin isn't weldable? What are its properties…
I_Love_Eng
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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 Long and WRC. What I don't know is for which…
bartosz.baczek
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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 steels, AWS D1.6. There is some mention of…
hazzey
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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 unsure that a dual purpose welder will be optimal…
James Jenkins
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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 titanium. Otherwise what are the strongest bond…
Tom
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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 higher when using straight polarity when compared…
M.Tarun
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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 stress and tensile yield stress are related (using…
S. Rotos
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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 one: My question is: is it possible to increase…
WackGet
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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 instructional videos, but so far I haven't found an…
False Identity
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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 mechanical engineering in general. After doing a little…
Green
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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 disadvantages - particularly its time-consuming…
user0
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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 welding (projection welding). I have seen a picture…
Roger
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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 when the electrode is touched to the workpiece,an…
Shwetha
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