Engineering Stack Exchange
Engineering Stack Exchange

Questions tagged [industrial-engineering]

Questions for this tag may be for improving processes or finding an efficient way to complete a task.

63 questions
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4 answers

Why does the stress-strain curve decrease?

This is a stress-strain diagram I have noticed that the curve decreases between points C & D and between E & F. Why does that happen? I expected the curve to always increase since the tension force in a tensile test is always increasing and the…
Eman.suradi
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6
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2 answers

Pipe seized to inaccessible coupling - how to attach a new pipe?

A friend of mine that doesn't use the internet much runs a commercial laundry. They use an old 'Manlove Tullis' laundry calendar (c. 1980) that looks like this: (click to enlarge photos) Essentially, it is a machine with 3 rollers (2 visible in…
Danny Beckett
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5
votes
4 answers

How to compare utilization rates?

I have the utilization rates of several machines for each week over a year. These differ per week because of the occurrence of machine failures and changes of orders. Meaning that one week a machine could be a bottleneck and the other week not. I…
user78820
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5
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1 answer

Is it possible to make very large diamonds using a pressure vessel at several GigaPascal pressure?

Nanocrystalline diamonds can be synthesized by direct conversion of graphite or carbon black mixed with low amount of boron (0.1%-10%) at 8-10 GPa, according to US patent No.20120255236. If some scientists decided to make very large monolithic…
anameen
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4
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4 answers

How to fairly distribute items when there is more demand than supply?

I have these 2 problems to solve (on the image). I have 9 stores that want different quantities of a product. The first store asked for 62 units, the second one 10 units, etc etc. The supplier sent a total of 138 units (case 1). I have to distribute…
Pat
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4
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0 answers

Waste Foundry Sand as an aggregate for concrete mixes. I have a question regarding grain diameter and it's possible applications

I'm working on a project with a company that uses sand casts during moulding processes and they provided us with samples of the sand they use before it's involved in the procedure and afterwards (Waste foundry sand). I'm wondering if there's…
Jorge Cabezut
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4
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1 answer

How to bend copper heat pipes?

I have purchased these copper heat-pipes; however, I am wondering how to bend them without kinking them or cutting them open due to pressure on weak points/bends. These are flat copper heat pipes, so I can't use a pipe bender; however, these are…
user15044
4
votes
1 answer

3D construction

Can someone please tell you what to start with to construct a Kids Bike Trailer as 3D. It should select material and geometry. I think I should start sketching with forces (children's weight) and type of load (whether it is tensile, compressive or…
Zouhir Bensebban
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4
votes
1 answer

silicone injection molding - making a flexible ring

I am working with silicone injection molding as a hobby and I am wanting to make a ring. I have tried with 100% silicone and the results are a clear ring that is not quite the consistency I want. I would like to experiment with making it more or…
SwimBikeRun
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3
votes
2 answers

Stability issues in gateleg table design

This is a table with two wings that fold down, and two legs per side that swing out for support. I'm pretty confident about this design being stable: The green section at the top is the only surface that remains in place. The vertical green section…
Geraldo
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3
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How do I EXACTLY calculate the k-factor for metal bending?

Introduction I've recently started to work with metals and the process of bending them. There is a lot more math involved than I initially thought. All the break press operators just have a standardized list of k-factors that they either use or…
Kapfy
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3
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What kind of professional(s) build/design factories?

I have a small self-built food processing unit (500sqft) but it is very labor-intensive. I want to make a larger unit (45,000sqft) with 100x more output using factory machinery (automation, conveyor belts, etc). My current unit is composed of a lot…
Samid
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3
votes
1 answer

How to specify the quickest movement a human can do based on MTM standards?

I am looking for a benchmark as a reference regarding the human Kinesiology that specifies the quickest movement a human can do on basic everyday movements like computer mouse clicking. As far as I know, there is an standard called MTM (Measurement…
Remy
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3
votes
2 answers

Check valve in compressed air pipe network?

I am working on a building that would like to used compressed air for some pneumatic actuators. They would like to bring the air in from an adjacent building that has more than enough capacity, but the air quality coming over is not sufficient and…
Secundus
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2
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Manufacturing with glass panels

I would like to design a 3.2-inch LCD display onto a product. The best aesthetic I have seen is using a flush glass screen front face. My product does not use touch screen. How would I go about sourcing say 4-inch glass panels? Is this sort of…
monkey
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