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Manufacturing processes: Hands on to hands off
Ever wonder what methods you can use to make something? From manual to semi-automatic to fully automatic, watch what methods you can use to dome some simple manufacturing tasks such as cutting and drilling. Created by MIT+K12.
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- What is the pressure exerted by a water jet on a very tiny point equal to exactly?(4 votes)
- Depending on the pressure settings, the size of the pressure varies from around 20,000 psi to 50,000 psi, or at two to three times the speed of sound.
*I use to be a sculptor and took notes on manufacturing processes such as this.*(6 votes)
- I've used a different kind of hand saw not mentioned in the video and would like a name to it. It has a long handle at the top, and the handle curves down to a long blade that is as long as the handle at the top. What kind of saw is that?(4 votes)
- Most likely some sort of bow saw like delta said.(4 votes)
- The CNC Mill saves a large amount of man-power, but does the time that it takes to program the path and calibrate the machine make it efficient for single unit production? How much time does it take to prep the machine for a new job?(4 votes)
- Keep in mind, too, that you will often want to make slight adjustments to your prototypes, so even for single unit production it's extremely useful to be able to reiterate your fabrication process with exacting precision.(1 vote)
- At3:00, are there saws that are pull and push (combined)? So do some saws cut both on the pull and push, or can the direction of the teeth not be opposite?(1 vote)
- Isn't it quicker to just use the motorized drill instead of the CNC Mill since for the CNC Mill you need to put the wood in the machine write the program then carry out the order and finally take the wood out, because with the motorized drill you just need to clamp the piece of wood then drill it and take the clamp off?(1 vote)
- You're right, but the CNC Mill is far more accurate.(1 vote)
- can the water jet cut through diamond? if so, how come?! water is a soft liquid, so how can it cut stuff?(1 vote)
- This video helped me so much i think this resource is the best(1 vote)
- isn`t the power drill more portable than the CNC mill?Does this mean that construction people use power drills more than mills?(1 vote)
- The power drill is more portable, yes. The mill is used in a shop, like when I was in middle school we used band saws and saws that cut circles. We made little wooden mice that rolled and we attached a string to them and pulled them.(0 votes)
- what is the differents between,,,
the big gaps in the saw,, and
small gaps in the saw?(0 votes) - How do I route a board with a router(0 votes)
Video transcript
[MACHINE WHIRRING] If you start with a
plain piece of wood, how do you go about making
this into different shapes? It depends on what kind
of tools you want to use. Any time you take a raw product
and you use tools and machinery to turn it into something
useful, what you're doing is manufacturing. Manufacturing has
changed over time and we use different tools
now than we used to long ago, but all of those tools can
accomplish the same functions. So what happens if
you want to make a flower that looks like this? There's various
ways that you can do that and various
levels of automation. "Automation" is using
computers and technology to help us instead of
just using our own hands. Carpenters used to do
everything by hand. So say we want to
drill that hole in the middle of the flower, how
would you drill a hole by hand? This is a tool called
the "brace and bit." The drill bit is here that
has sharp edges that allow it to drill into the wood. So the way you would use this
is you position the drill bit where you'd like to make
the hole, you apply pressure, and then, by hand, you
rotate the drill bit and have it drill into the wood. It is effective, but it
takes a very long time and quite a bit of elbow grease
to get the hole to go through. Ha! We have a hole,
ladies and gentlemen. [CHUCKLES] We can drill a hole by
hand, but we can also use technology to help us do
it faster and with less work. This is called a "power drill." It uses the same drill bit
that the hand drill did, except now we have a motor
attached with a battery that helps us do some of the work. So with this-- [DRILL WHIRRING] --we can drill right through. This is a piece of equipment
called a "CNC mill," which is a computer-controlled
piece of equipment that we can program to cut
whatever shape we want. In this case, we're
going to be using this for drilling a
hole, just like we used the power drill and just
like we used the hand drill. Because this equipment
is automated, instead of cranking on
a hand drill by hand, all we have to do
is hit a button. [MACHINE WHIRRING] So now, we figured out how to
drill the hole so that we have a nice center for our
flower, but what happens when we want to make the petals? Now, instead of
drilling, we're going to have to use a technique
called "cutting." One of the earliest methods
was just with a saw. These are two examples
of "handsaws." There are two different
kinds of handsaws. One is called a "pull saw,"
and one is called a "push saw." This is an example of a Japanese
pull saw, and what you can see is that the teeth here face
a little bit backwards. That means that,
when you cut, you'll be pulling this direction
in order to make the cut. This is an example
of a push saw. And you can see that the
teeth face slightly forward, and that means that you're
cutting while you're pushing the saw through the material. [SAWING] Just like our hand saw had a
blade made of metal with teeth on it to cut through
our material, this is a machine
called a "bandsaw" that has the same blade right
down here-- also made out of metal with teeth to
cut through our material. But instead of pulling
the blade by hand, we have a motor up here
which turns the blade for us. So using this machine, we can
cut right through our material. [MACHINE WHIRRING] Just like using a bandsaw was
a more automated way than using a handsaw in order
to cut material, a waterjet is even
more automated. A waterjet is
controlled by a computer that we can program to
cut any shape we want. It takes an abrasive
grit, and it mixes it with a high-pressure,
high-velocity stream of water that goes through a
tiny nozzle to blast through almost any material. The nozzle traces
out the contours of whatever shape it
is that we want to cut. [MACHINE WHIRRING] So today, we've looked at
using manufacturing processes to make a flower. In order of
increasing automation, we've looked at drilling from
a hand drill to a power drill all the way up to a
computer-controlled mill. And then for
cutting, we've looked at starting with the handsaw. moving to a bandsaw, all the
way up to an automated waterjet. All of these tools do
essentially the same things. And at the end of
the day, you've turned your plain piece of
wood into a beautiful flower. Thank goodness manufacturing
has become automated, and it's moved from
hands on to hands off or I might still
be here drilling a hole with a hand drill.