mechanical course...

sumthing tat is fun in mechy course...


well... juz sumthing to pass time telling story...

year 1 sem 1

amalan: we did 4 section... they are fitting, milling, welding and lathe.
for fitting, we nid to use the basic tools such as saw, chisel, drill, "metal pen", hammer n anvil to do the required shape and another shape from metal to fit into the 1st metal piece. dam tired... this required strength and i believe the girls will ask for guys help or play cheat... my product suck, barely fit into it and unable to fit in when i turn it another way round due to symetrical...
for milling, we nid to operate a milling machine... the 3 axes, x,y&z must be carefully operate due to the cutting tools moving at the same time with the time we control its movement... if not, the work piece will have a dent or some scratches on the surfaces... we are able to flattened the surfaces and make a round hole on it. the workpiece must be in a cubic or cuboid shape...
for welding, we nid to weld sumthing of coz... 2 metals separately which will end up sticking to each other... when u wear the mask, nothing u can c until the sparks is produced from the electrode rod. watever u do... do not let the electrode rod touch the metal piece or the "table". it can stick like a super glue on it... dam... i miss a class... sien... due to RnI fest...
for lathe, we nid to control the lathe machine... the rules are the same with the milling, 3 axes. the difference is we move the work piece instead of the cutting tools. and the work piece must be in cylinder shape... we nid to change the cutting tools a few time to produce different shape with different process (drill, groove and mill). the workpiece is rotating in fast speed all the way...

year 1 sem 2

amalan: we also did another 4 parts... this is more "fun"! we did pneumatics, electro-pneumatics, foundry and hydraulics...
for pneumatics, we r handling with d compressed air. we used it 2 make the mechanical part 2 do work. have u ever wonder when the bus door open, it will produce a weird gas released sound? we are "playing" with those things by using tube instead of wire to connect the components.
for electro-pneumatics, it is a combination of electrical and pneumatics circuit in order to produce some output... so basically we are handling the input (switch and logic gates) with the electrical circuit and all the output (piston, light and etc) with the pneumatic circuit.
for foundry, it is a concept of producing a product with molten aluminum (or other metal). we designed a desired shape by using a styrofoam. then we use a metal case and half filled it with silicon sand and compress it. put the work piece styrofoam on the sand and burry it. build a "bridge" by using styrofoam and place it from the work piece to the surface of the sand. bury the whole thing and make sure the sand were compressed too. we nid to carefully load the metal pail with the molten and wear a proper clothes and used a proper tools to carry the pail. then, pour the molten on the bridge till the molten overflow a little bit on the sand surface. wait 1 hour and slowly remove all the sands away. tadaa... here goes the product...
for hydraulics, we are handling with the liquids pressure and velocity. with this we are able to use the hyraulics power to make the machines to do work. however, when it reaches my group's turn, the machine happen to be broken down. so wat i learn is the theory and calculations. zzz...

year 2 sem 1

amalan: as usual 4 parts... this time is computerized machine thingy... CNC milling, CNC lathe, EDM wire cut and EDM die sinking.
for CNC milling, the machine is juz like the conventional milling machine but we operate it using a software in computer instead of manually. CNC stands for computer numerical control. using all the G and M codes can drive u crazy! juz use ur imaginary, common sense and basic maths skills to produce some shape or holes on the square shape work piece. this is the easiest...
for CNC lathe, the machine is also like the conventional lathe machine but more advance in the terms of its function and its limit to produce a more complicated shape or designed of a cylinder work piece. of coz, ur work on the computer program is more complicated too. the dimension of the project nid to calculate properly if there is any shape concerning with the radius. the hardest!
for EDM wire cut, we used a designing software such as autocad, solid work and etc etc to do the drawing of the product. EDM stands for electrical discharge machining. it used the wire made of copper to cut the workpiece. it is a slow process but very accurate. good for complex and small shape thing. juz enter the file from the design software into the machine, adjust the workpiece and juz hit the start button. everything will be done in the few hours. did the kingdom hearts for this. i designed it with my autocad skill... nice and it is a killable object due to sharp end.
for EDM die sinking, we used the electrode which made of copper to make a certain shape on the work piece. basically we nid to design the shapes on the electrode. juz like the way how u wana make a "mark" on ur house using the hot metal. then lock ur metal work piece on the magnet bench and fill everything up with kerosene. and do sum complex set up and then wait till it stop.