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Questions tagged [manufacturing-engineering]

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what is the most efiicient way to mill/ machine a spherical and pancake ish structure as seen in the figure?

The overall dimensions for rectangular block: 8” x 3” x 2”. Ball should stay the longitudinal center line of rectangular block Bottom pancake feature should stay lateral center line of rectangular ...
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16 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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1answer
55 views

Cheapest way to produce 200-1000 pieces of 0.2 mm copper plates

I want to build a strong electro magnet. I came to the conclusion that the smartest arrangement would be something like hundreds of thin sheets of 0.2 mm copper with PTFE isolation. This reduces ...
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5answers
55 views

What is the most efficient way to remove the cardboard center piece from a roll of paper?

For a temporary job I'm working, one of the tasks we are sometimes required to do is to unroll these giant spindells of paper (think rolls of toilet paper the size of a trash bin except the paper is ...
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2answers
36 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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What are the challenges in building a 'sports car' frame and body?

Clearly if it were easy to produce attractive looking cars for cheap, there would be a lot more 'modern' and good looking cars on the road. While beauty certainly is in the eye of the beholder in ...
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0answers
22 views

How can I get the spindle driver current internally?

I am working on monitoring research. During it I found a lot of papers use Hall effect sensors to get spindle current. However some of them are accessed internally to spindle driver current. I will be ...
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0answers
33 views

Manufacturing line Efficency

This is my first post, if there is a different section this should be posted in please advise and I will move it. Here's my engineering problem, So I've recently run into a problem at work, and it ...
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1answer
37 views

Two intersecting prisms

Case 1 The development of Case 1 of this problem in which the axes of the prisms intersect at right angles, is shown in Diagram 1. Note that inter-edge lines are required for the development of both ...
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39 views

press fit ball joint

I enjoy creating mechanical designs but I am not a trained mechanical engineer. I have a technical issue with a joint design that needs to be permanently retained using a press (snap) fit. Any idea ...
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1answer
37 views

CNC or other method for Wire Forming

How can I quickly and accurately form batches (10 to 100) of parts from mild steel wire about 3mm diameter ? The parts are 3D with bends of several radii, about 200mm in the longest direction with ...
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2answers
37 views

What type of resin should be used to injection mold an instrument mouthpiece?

I'm designing an electronic musical instrument and need to injection mold the mouthpiece. This is my project: Multiwind. The mouthpiece needs to be safe to go in the mouth, opaque (preferably black),...
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Multi touch cheap resistive panel

I am building a project and for it I need a resistive touch screen with palm rejection or a multi touch resistive touch panel where in skin touch can be rejected. I was thinking about buying a ...
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0answers
19 views

Role of shear force in stamping processes

I'm working on an application that's similar to stamping a cup, but with a thermoplastic instead of a metal. I'm wondering what role the shear force plays in the stamping process if you're starting ...
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2answers
74 views

Methods for cutting glass

I am trying to find the easiest way to cut a thick glass pattern (glass thickness of 1-3 mm thick) without breaking. I am considering laser cutting but I don't know if I can cut glass of this ...
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0answers
39 views

Influence of shear force on pressed part with steep walls

I'm working on a project that involves pressing a softened thermoplastic sheet in a two-part mold to form a part 0.090" thick. None of us at our small company are experts in matched molds, and we've ...
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1answer
71 views

How can I couple two small parallel shafts offset a short distance from each other?

I have two parallel shafts, 3 millimetres in diameter and offset by 8 millimetres, both anchored in surrounding housing by ball bearings. When one shaft is rotated (via gear), I want the other shaft ...
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0answers
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Fabrication strategy to build larger version of our ESP

Our setup https://www.youtube.com/watch?v=uKuzshqjkYA The diesel generator exhaust is routed via our test setup. (notice the difference between ON/OFF states). Generator in test is similar spec as a ...
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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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27 views

Laser Safety Glass Window for DMLS machine

I am trying to figure out what level of laser safety I would require from a glass window that I will be using in a Direct Metal Laser Sintering (DMLS) machine. I have used the European BS EN 207 ...
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1answer
38 views

How did scientists develop the stencils that made even more precise processors than they had previously?

The history of computers seems somewhat pervasive since there are so many steps in modern manufacturing and so many changes in trends with transistors over many years. Grasping how we got to our ...
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1answer
45 views

Operator's Efficiency

Good day, I have assigned a task where I have to calculate efficiency per operator as shown in image below. But I have no idea how to get the correct formula. Any help would be greatly appreciated. ...
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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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How technical specifications for centrifugal casting machine are considered?

I am calculating the design parameters of the centrifugal casting machine. But, I am unable to proceed further due to the unknow variables involved in the calculation. Consider, designing of the new ...
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2answers
28 views

How to estimate the time cost of interrupting a task and picking it up again later

In terms of personal productivity (single machine scheduling) when a task is interrupted before being done in order to switch to a different task, it incurres a 'tear down' time cost - putting tools, ...
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1answer
32 views

Document Feathering Tolerance on Drawing

I am recreating an engineering drawing package from old quotes for a large assembly. In the quote they say "All length edges not to exceed 1/32" deep feathering". For some context this is for a bunch ...
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2answers
29 views

How to retrofit seed starting trays to prevent root circling

I grow plum trees from pits using seed starting trays: Unfortunately, I have a problem where the roots of the seedlings grow in circles around the bottom of the cavities of the trays. The circling ...
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26 views

Overall Equipment Effectiveness

I would like you all to verify my answer to this overall equipment effectiveness question (OEE). I do not have the solution and would like to consult your expertise on this area. The information ...
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0answers
56 views

Technical Calculations of the molten metal flow rate from crucible to laddle?

I have some doubts, I am thankful if anyone helps me to find a solution. Consider a image as a centrifugal casting machine. If the process includes the pouring of molten metal from crucible to empty ...
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2answers
64 views

Does every engineering design needs to have a complete theoretical backing or may experimental data suffice?

This may sound rather vague on its own so I will explain with examples. The solid booster rockets used by NASA space shuttle used a central bore design because it had a certain characteristic on ...
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1answer
98 views

How to design a casting machine?

I was wondering, what are the factors to consider or how to find the required technical specifications for the new machine? For example, if we consider a design of horizontal centrifugal casting ...
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2answers
43 views

Surgical steel and part production

Steels 316L, 420, 17-4PH and 316LVM are often chosen for medical products and labelled as "surgical grade". I am curious as to how these types of steel are used for the production of common medical ...
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2answers
70 views

Pneumatic Can Crusher (Number of holes allowed for crushing plate)

Hi I'm designing a pneumatic can crusher for my course, and came across a problem. How many allowable holes would be ideal to relieve pressure on the crushing plate of the device? Are there ways to ...
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1answer
128 views

How to make an annular metal to metal snapfit?

I am designing a watch case and would like to know how to make an annular snap fit for the backplate. The material used is stainless steel. I could find references for Metal-plastic snap fit but I ...
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1answer
37 views

Tolerance of pin in Scissors

I'm currently designing scissors, and I have to describe the tolerance and fits of the parts. What kind of tolerance must be used for the pin holding the two blades together, though allowing for ...
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1answer
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Real world applications where one would use a force function in PLC programming?

I'm curious about which scenarios one would use a force function when using a PLC programming interface. Examples pertaining to process engineering, manufacturing, or industrial settings would be ...
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2answers
46 views

How can i obtain heat from conductive paint using dc current

I have been searching for a material that can heat up when we supply dc current. Many give me a suggestion for use nichrome wires. Or carbon rich paste paint(conductive paint). I want a sheet of such ...
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0answers
28 views

Industrial machinery and equipment [closed]

I am a mechanical engineer who is interested in learning different processes and equipment mainly used in process industry namely, textile, chemical, sugar mill, and other food process industry. Is ...
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3answers
53 views

How to find out what a material is made of specifically?

Let's say I buy a barbecue grill, is there a material testing kit that I can buy that'll allow me to find out what metal the grill is made from and if it were galvanized or cured in a particular ...
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2answers
50 views

Is there any method to recycle air-pollution into fertilizer?

Vehicles and Factories produce air-pollution like Nitrogen Dioxide(NO2) and Sulfur Dioxide(SO2). Plants use Fertilizer with those same compounds (NO2 & SO2) So, by what method can air-pollution ...
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1answer
94 views

Purpose and name of fine pitch marks on a cast metal part

I have seen this kind of mark on various cast metal parts. This is an image of the base casting of a hard disk drive made by HGST. What are these marks for? What are they called?
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1answer
28 views

How to avoid oxidation of Si using a sub nanometer layer

Which material can be used to protect a Si layer from Oxidation by a sub nanometer layer?
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1answer
60 views

How to obtain an homogeneous mixture of 10 000 tons of minerals, each one in a different pile? [closed]

I have several (at least six) piles of mineral adding up to 10 000 tons. I want to mix them in one homogeneous big pile. How can I do it? Thank you very much!
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1answer
189 views

Sheet Metal Bending: stuck on calculating the minimum radius required

I'm used to calculate the minimum radius required for bending operations on both aluminum and steel sheets, given the following parameters: https://imgur.com/a/7akHC Problem statement: For a sheet ...
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2answers
97 views

Operation of Fruit Blender-Mixer

I was wondering how blenders used in the kitchen for the purpose of creating smoothies, soups, etc. operate, particularly, how the rotation of their blade is achieved, i.e. what sort of motor is used ...
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1answer
43 views

What considerations should I take when flame-hardening a wheel?

I'm currently trying to figure out whether or not we can flame-harden a steel wheel which was supplied with a lower hardness than expected. I'm worried, however, that flame-hardening can either deform ...
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2answers
182 views

What's this mystery symbol on a manufactured machine?

I hope this is the right place to ask this question; if not I'd really appreciate some tips as to where else I can go for answers. The symbol above (apologies for the blurry quality) is on a Chinese/...
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2answers
25 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
233 views

Circular keyways - advantages / disadvantages?

What are the advantages and disadvantages of using circular section ("Scotch") keys, keyseats and keyways? I am not referring to Woodruff style, I am only interested in the type where the key itself ...
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2answers
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Designing bulk material handling system for injection molding

does anyone have any resources for designing a bulk material handling system for an injection molding outfit? Currently we get material in gaylords and vacuum it to the hopper on each molding machine ...