P6: Explain different additive manufacturing techniques used in 3D printing.
P7: Produce a 3D component using additive manufacturing techniques.
M4: Produce 3D CAD data for the component in STL file format.
D3: Assess how additive manufacturing techniques are used for the production of final components and in advanced applications.
Select the export option in Fusion 360
Choose the STL option from the drop down
This confirms that the export was successful
I opened the files in fusion then exported all of the components as STL files so I can transfer them over to the CAM software. I converted to an STL file because it is the most popular file type for a 3D model and can be read by almost all CAM software.
I imported the files into Bamboo studio and changed the perameters such as the infill to suit the parts I needed printing, they needed to be strong but not waste material so I opted for a 30% infill
Here I rearanged the models to space them out, I stood them up so less support material was needed to reduce the print cost and reduce the amount of materials needed for the print. This small change also reduced the amount of time taken because there was less unneeded printing.
I used the CAM software to automaticaly generate the gcode that the printer would need to print the part. The software desides where the infill would have to be the thickest (such as the sides) so that the print stays strong.
Additive manufacturing
Additive manufacturing is any manufacturing process that involves adding material to a build plate build area. In this essay I will be talking about this manufacturing method and the benefits of using this.
Recently, new methods of additive manufacturing have become more popular because of there versatility with what they can design, they can have strange organic shapes that art achievable with other methods. Using additive manufacturing in tandem with new smarter CAM software that can-do things like generative design can create lighter and stronger parts. 3D printers only use the material that it needs as appose to subtractive manufacturing where material is cut away and wasted as scrap. This makes additive manufacturing more efficient than subtractive manufacturing, any material left over from the process can be used for other prints
With additive manufacturing, manufacturers can quickly produce prototypes. Additive machines are very flexible and can make basically any shape in a 3D space, therefore when making a simple prototype the entire model can be made using additive manufacturing making it easy to use. Additionally, additive manufacturing doesn’t waste materials making the prototypes less costly and more efficient than using subtractive manufacturing.
There are many different techniques that 3D printers use including Fused deposition modelling (FDM), selective laser (SLS), stereolithography (SLA), and electron beam fabrication (EBF).
This is the most widley used 3D pritner because of there low cost compared to all of the other types, this makes them great for people trying to learn 3D printers or schools and other facilities that need alot of printers.
An FDM printer works by depositing material layer by layer in by following a precoded path, these printers mainly use polymers such as PLA and ABS.
A SLS printer uses a high powered laser to bind fine grains of material together to create a solid structure. This process layers fine powdered material then ,using the laser, it sinters the particles of the powder together to create a layer of the model.
This method of printing has many benefits such as its ability to create strong functional parts and having a low cost per part because of its ability to reuse any powered that wasn't sintered making it very material efficient and a more sustainable than subtractive manufacturing or other 3D printing methods that require supports.
There are also some disadvantages of using SLS printers such as the part having a grainy finish and requiring further work to make it smooth and usable and that large flat surfaces and small holes could have mistakes such as wrapping or over sintering.
Stereolithography is a commonly used resin 3D printing process because of its high resolution and accuracy meaning it can print water tight part. This printer works by using a light source to cure resin. Out of the other 3D printing methods, SLA printing has the smoothest surface finish meaning parts are already presenting ready after the supports have been removed.
These printers don't produce waste because any supports can be melted down and reused making it very material efficient and more sustainable than other options.
EBF printing uses a focused electron beam in a vacuum to melt metal into a molten pool. Then, once that layer solidifies, then next layer goes through the same process
This is a 3D printing method being developed by NASA to create metal parts in space stations, this way they can print it as they need it which will save them money compared to having to haul the material and parts into space.
Generative design is a new method of modeling that uses ai to find the least amount of material that is needed for a part to fit the perameters specified by the manufacturer. This is a very material and wight effective meaning its a great way to make parts that need to be light such as car parts on super cars.
Addative manufacturing currently is the only method of manufacturing a generatively designed model meaning addative manufacturing could be the future of super cars, rockets and drones that need to be as light as possible.
The first 3D printed building 1930 and still needed alot of manual labour to make it work, workers had to constatly refill the machine while it was running. The printer could only print is a circle and wasnt very large so it was limited to makeing slim cylindrecal buildings only. technology has advanced greatly since then, now using 3 axis machines meaning any design that can support itself can be printed and it takes less than 24 hours to create a home.
It is also very cost effective to print homes in this was becuse it requires little manual labour - expet the setting up of the machine and the plumbing and wireing. 3D printers could create complex designs for buildings without the extra steps of machining the bricks that would usually take time. This allows a greater degree of freedom fo architechs and home owners .
This technology can be used to solve the global housing crisis and create cheap homes for people that couldnt afford houses. This is a great step for 3rd world countries where there arnt enough homes to house everyone. materials wont need to be transported with the printers because they can use the materials that are available where they are situated such as clay .
A brake calliper is a key part to the braking system in a car, It houses the brake pads and uses pressure to squeeze the brake pads against the disc. This means the brake caliper needs to withstand alot of pressure, they need to be expecially strong and stiff when on cars used for racing like the car that bugatii designed there 3D printed brake calliper.
Bugatti created the worlds first brake calliper with a 3D printer, this new design combines the minimum weight with the maximum stiffness. This design cut down the weight of the part by about 40% whilst maintaining its high strength level. This marks the dawn of a new era of super cars which will be much lighter than previous cars meaning they can accelerate faster making cornering quicker and easier to control.
To make this part the company uses an SLS printer, when done at the right temperature the binding between the powder will have a very high tensile stress and wont be easly pulled apart. This 3D printing method is very material effecient,it wastes no materials on supports because the layers can rest on the the poweder that wasnt sintered when it is being bonded.
Addative manufacturing has a great number of uses in the medical scene because it is ideal when creating one off parts, these parts could be tools that are specialy designed for one application or a part that a patient needs custom made to fit them. 3D printers can be used to print patient specific organs for transplants. By using the patients own living tissue to print the custom organs, this will greatly reduce the risk of getting a transplant because the there wont be a risk of the patients body rejecting the organ or it not fitting properly. Additionally, they wont have to worry about a shortage in donations.
3D printers can be used for much more than custom made organs, some other examples of applications are: patient specific prosthetics that are made to fit the user precisely and comfortably to improve the quality of life of people who need prosthetics, manufacturing custom dental implants and braces, it could be used to print a model of the patient so the surgeons can practice before taking a risky procedure, etc.
In the world of art 3D printers where a massive breakthrough as it allows artist to make sculptures previously unmakeable and now that printers have become much more affordable, this technology is much more accessible to artists allowing more people to delve into the freedom that additive manufacturing permits.
Two German artists secretly 3D scanned the bust of Queen Nefertiti from the Neues museum in Berlin. This is a high valued artifact from ancient Egypt that Egyptians authorities believe should reside in its country of origin. This 3D scan is now online where anyone can download the file and print it, they did this in the hope that Egyptian museums would print it and place it "where it rightfully belongs
This horse shoe was designed by Andrew Allshorn to help a horse with a severe fugal desease, this design stop moisture from being absorbed by the shoe by completely blocking any of the shoe that would come in contact with the ground. Andrew designed the outside of the she to be dense so that screws could still be screwed in like the normal shoes. On the inside bit he used less infill and a lattice structire so that it was strong but soft so that if freida stood on a stone she would not feel it on the injured part of her foot.
Andrew opted for the use off a FDM printer because it is cost effective compared to other methods and could print the plastic material, they did not need a good surface finish on the part so that wasn't an issue. that they needed and its simple geometry and flat design meant it did not need supports so wont waste materials. It also means that more shoes can be easly printed for cheap
https://www.hubs.com/knowledge-base/what-is-fdm-3d-printing/
https://www.printpool.co.uk/articles/design-for-sls-3d-printing-the-ultimate-guide
https://www.3dnatives.com/en/stereolithography-explained100420174/
https://www.whiteclouds.com/3dpedia/ebf3/
https://newsroom.bugatti.com/press-releases/world-premiere-brake-caliper-from-3-d-printer
https://shop3duniverse.com/blogs/digital-fabrication-projects/how-todays-hobbyists-use-3d-printing
https://www.soundoflife.com/blogs/design/how-3d-printing-is-benefitting-the-art-world