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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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19 views

Two wire tandem gas metal arc welidng (GMAW-TW)

Please explain how two wire tandem gas metal arc welding (GMAW-TW) process requires less heat input. Appreciated if reference is given.
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0answers
19 views

High frequency welding and parameters

I need to know how width affects the welding seam. I'm working with a HF welding machine and a thermograpchic camera. I'm trying to understand if it is important for the quality of the tube and the ...
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2answers
41 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?
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2answers
86 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 ...
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1answer
44 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 ...
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0answers
44 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
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1answer
44 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 ...
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2answers
96 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 (...
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0answers
28 views

Is this symbol indicating a Back Weld or Backing Weld?

I am reviewing the AWS D1.1 2015 for a project and came across a Prequalified procedure for a CJP weld which is as attached. Since I am not very familiar with Welding, I was wondering if I can ...
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1answer
72 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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0answers
21 views

At what angle does my sleeve have to be machined at in order to laser weld it to a tube?

I want to rotary weld a sleeve onto a tube but due to equipment limitations, I can only laser weld at an angle that is perpendicular to the length of the tube. Is there a "magic" angle at which the ...
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3answers
46 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 ...
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1answer
263 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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1answer
48 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(...
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4answers
788 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
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2answers
73 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. ...
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2answers
57 views

How does Electric arc welding compared to gas welding?

While focusing on Quality and strength of welded joints produced but both methods..
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2answers
26 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 ...
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1answer
64 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 ...
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1answer
127 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
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1answer
29 views

Steel surface welding with high-frequency current

High-frequency currents induce skin-effect resistance that is used on some applications to weld metals. Assume you have two steel rectangles of dimension $h_0, w, l$ and $h_1, w, l$ placed together ...
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2answers
64 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 ...
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2answers
339 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 ...
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1answer
37 views

How is this aluminum heater mounted to the stainless plate?

I'm looking for a way to mount a 1000W electric heater to a stainless base. Electric kettle heaters could fit my requirements, but I'm wondering how the Aluminium heater is mounted to the stainless ...
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0answers
36 views

The 2 outlets in a typical welding oxygen cylinder

So I bought this torch kit recently: Mag-Torch Oxy-Map Torch Kit The oxygen cylinders that came with this kit and another one I bought from a local hardware store (same brand) dont' last very long. ...
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2answers
266 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 ...
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3answers
3k 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 ...
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0answers
247 views

Maximum load calculation

I am trying to determine the maximum load before failure on my welded bolts. I am using a hydraulic rig, in which I can read the pressure in bars through a manometer, but the thing is, I am confused ...
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0answers
47 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 ...
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1answer
1k 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 ...
3
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2answers
794 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 ...
3
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1answer
83 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 ...
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1answer
3k 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 ...
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1answer
444 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 ...
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1answer
136 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 ...
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2answers
533 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 ...
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0answers
211 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 ...
5
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1answer
1k 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 ...
2
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1answer
97 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 ...
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10answers
10k 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 ...
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1answer
451 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?
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4answers
571 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 ...