Posts Tagged ‘laser cutting’

Class: Technology

Machine: Laser cutter

Software: Autocad 2018, Rhinoceros 5

Material: Plywood; thickness: 3,6 mm

Size of the object: 30*25*14 cm

Challenges:learn how to work with laser cutter, how to use AutoCad 2018 and use correct scale in Rhinoceros 5

TASK | APPROACH

The 1sttask was dedicated to creation of own press-fit projects using plywood details of 10*10. Core idea was to familiarize students with software used and get first experience with laser cutting objects.

As advised on the class I dived into Pinterest to find a good idea. My attention was drawn to a simple though practical laptop stand and I used this concept to do one of my own. 

https://drive.google.com/file/d/1fu_UQyQPE7z9_lP4wyf53MA8XUvmGJ99/view?usp=sharing

It’s ready to use.

Scope of the Assignment:
Assignment II is an assignment in which we were to make items of our choosing using the basics gained 
up to that point in time, these being the laser cutting process as well as the basics of press-fit.

Inception:
The process of 3D printing is fast gaining popularity especially with regards to prototyping where it has become a must have component if one is to make a prototype. Having a prototype printed out is essential to the process of design since it helps to actually feel and see the item being prototyped. In anticipation of various items to be used in the "City Project" field, I chose to focus prototyping on components related to the "City Project"

Troubleshooting:
Duration of 3D printing Process.
Depending on the complexity of the item being printed, the process can either take just a few minutes, to several hours.
Iterations 1 - 3 of Palm bracelet along with knuckle ring component

Model of Component – Palm Bracelet

The modeling of the above captioned palm bracelet was subsequently instrumental in determining the ridiculousness of our initial assumption both in terms of utilitarian inconveniences as well as ease of use, not to mention the fact that it just failed to serve its purpose. Subsequent modifications forced the team to think more organically. This hands on approach enabled the team to acknowledge and understand the scope and limitations of the technology in use. Depending on the task at hand, I was able to optimize and subsequently better choose the means with which to make each respective prototype component.
This outside the box approach to the prototype (heck, the box was thrown out entirely) was one of the issues in that it presented a steep learning curve to me personally. 
The optimization of the design is enhanced by the fact that the item becomes tangible and it can be tested (if printed to scale). This is one of the few shortfalls of the virtual environment and simulations in CAD software as a whole. 
The printing process is also limited by the dimensions of the printer used. For instance, the Ultimaker 2 Go has a build volume of 120mm x 120 mm x 115mm. 

Materials Used:
Printing was done on Ultimaker 2 Go, using PLA (Polylactic Acid) which as it turns out, is one of the more commonly used 3D printing materials. The model was saved in STL format and was prepped for printing using Ultimaker Cura.

Ultimaker 2 Go

Lessons Learnt:
The prototyping process is made much easier with the use of 3D printers.
The choice of materials (of the prototype) should be taken into consideration during the printing process.
The use of a resin laser 3d printers is a more accurate method of 3D printing.

TOWER – GNM

Assignment Parameters:
The assignment was to construct a tower using press fit laser cut modular pieces with a dimensional 
limit of 150mm on the length. 

Materials:
Modular patterns were restricted to 3 patterns or modular units.
Laser Cut plywood

Modular Units for Tower Structure

Pre-Design - Conceptual approach:
The concept was based on attainment of the maximum height without compromising the structural 
integrity of the tower frame. with these two parameters as the basis, it was evident that 
additional stability could be attained by the use of a cross-pattern of "beam" structures. 
Horizontal elements were left out. 

Iterations and Re-Design:
In line with the initial concept of simplicity, there were few iterations between the initial 
design and the final version.

Assembly of Tower

Fully Assembled Tower

Troubleshooting:
The initial design had stability issues due to the initial proposal of framing the beams using 
continuous interlocking. This made the initial design heavy. Whereas the interlocking pattern 
was maintained for the base in order to keep the structure stable, the interlocks were discarded 
at the subsequent upper levels, making the structure lighter and allowing for attainment of 
increase height.

Cutting & Assembly:
Cutting out of the modular units was done using a laser cutting machine.
The cutting process took about 45 min.

The Team

Credits:
Whereas the final product was a product of active team work on the part of all team members, 
the cutting work was conducted under the guidance of the course supervisor Ivan Mitrofanov 
since at the time non of the team members could conduct the cutting works independently.

address: 20 Myasnitskaya ulitsa
(metro stations ‘Lubyanka’ and ‘Kitay-Gorod’)
Moscow 101000 Russia

phone: +7(495)772-95-90 *15026

email: city@hse.ru