Week 5

Drill Panel 1 & 2
Drill Panel 1 & 2 will put our hand drill skills to test. Reason being we will be given a plexiglass and aluminium workpiece. Both material will break easily if not well taken care of. So, it will put our hand drilling skills to test if we are able to drill it with the correct technique and a pair of steady hands

Drill Panel 1

Material is Aluminium, so it has to be accompanied by the magnetic clamp when being clamped onto the vice.

This is the end result if everything goes well. We have to ream 10H7, counter sink, counter bore and tap the holes! There is even chamfering and filing of radius!
I can say that the challenging part in this assignment is the reaming of the holes as the pre ream hole size is 9.7mm. This is a large drill bit and will chip off the aluminium if not well drilled.

Drill Panel 2
Material is plexiglass (plastic), so the material will chip off easily if the increment of drill bit is greater than 1 mm.

It is a good practice to protect the surface of material like aluminium or plastic as the surface will be scratched easily. We have also labeled what do we need to do with each hole. This will help us to speed up the process of drilling and save us the trouble of referring to the blueprint over and over again. It is also good to do that as it will help us prevent drilling the wrong hole.

This is the end result. The surface is well taken care of hence there are no scratches.
The challenging part drilling this is the pre drilled hole size before reaming. As mentioned earlier, 9.7mm is a rather big drill bit and wil lcut the material. Above is an example of the plastic chipping off when drilling the 9.7mm hole. This can be due to increment of drill bit more than 1mm if not is due to improper drilling techniques.

This is the correct technique of holding the hand drill. The drill is 90 degrees and perpendicular to the workpiece.

Key learning point in both drill panels tells us that some materials are to be handled with extra care as they are not as strong as steel.

Riveting by Hand & Riveting Exercise
Riveting by hand is rather simple but challenging as it require skills to knock the rivet straight and to the correct diameter.

This is how we do riveting without the use of riveting gun. We cannot hammer too many times as it will flatten the rivet and the rivet will not sit properly.

Microstop is used to do a small countersink on the material for installation of flush head rivets. This is a sensitive tool and it must be calibrated accurately before using on the actual material.

As for riveting using the riveting gun, I will show you a video on how our instructor Mr Zahir demostrated to the class with the help of some students. Lets sit back. relax and enjoy. =)


Mr Zahir got a little shock cause Lu Wei did not follow the correct instructions. LoL!
The learning point of this exercise to to teach us the skills of using a riveting gun to rivet nicely.

Lastly, I will show you why it's better to always have a guy around in the workshop =p


NOOB!! =)

-PeRrY-