INTRODUCTION
This was the second assignment given to me. I was told to make a stool so that I could learn the welding operation.
06/10/2024
First I found out some standard dimensions of the stool on the internet. then I got some range in which standard dimension stools are made. After that I went to workshop where some stools were there to take their measurements.
After taking the measurements I made a sketch of it in the notebook with all the dimensions that I took.
07/10/2024
Today I made the design of stool on the solidworks.
08/10/2024
I showed this design to Prasad sir then he told me to calculate the stress that the stool of the dimensions I have made can bear. For that I first understood some concepts about Strength of Materials which were not cleared to me. I learned about yield strength which is nothing but amount of load or force that is acting on body beyond which the body starts to deform. Then I calculated the stress that could act on my stool. For that purpose I assumed my weight as Prasad sir told me to make it according to my weight.
09/10/2024
Today I showed my calculations to Prasad sir then he also told me to calculate the at what point Center of Gravity of my design will be located so that to check the stability of the structure. Then I calculated the Center of gravity of my design.
Then I check what should be the limit of Center of Gravity for Stability and it came out to be 15.83 cm and the center of gravity that I calculated was 11 cm which was under the limit. Then I showed it to Prasad sir and he told me to start making the stool. Then I went behind the workshop where all scrap is kept to find the material. I got the pipes of ms of required dimensions there.
11/10/2024
The materials I found from the scrap were not of required lengths. So I cut the pipes according to my required dimensions. After cutting I also grinded them because the edges were too sharp.
13/10/2024
As I wanted to make the square frame from the small pipe pieces. For that I made 450 cut at the each end of all the small pipes.
After cutting I again grinded the edges of it. Then I started the welding operation. First I welded the square frame. And then again grinded it.
After that I welded the legs of the stools on the square frame.