Drill Driver Technology
DeWALT has made a wonderful video to show its new product.
Look at “Intelligent_Power_Tools_-_Dewalt_XR.flv” in “DeWALT_videos” folder.
At this very moment, unfortunately, the sound track has been lost!
It will be great of yours to build a new one!
To help you to make the job, next parts will explain to you in details what this product is.
1 Features
Look at “DeWALT_4.0AH_LI_ION_Battery.flv” video in “DeWALT_videos” folder, and
explain:
a) What has this tool been made for?
b) Why is this product so attractive these days?
c) In your opinion, what are the advantages and disadvantages of a cordless power drill
driver?
2 Drill driver parts
On the next page, according to part numbers, place the name of the part for each item listed
below :
- CHUCK
- CHUCK SCREW
- MOTOR & SWITCH ASSEMBLY
- IDENT LABEL
- HOUSING SET (Left and right parts)
- BELT HOOK KIT
- FOWARD/REVERSE BUTTON
- TRANSMISSION ASSEMBLY
- GEAR SHIFTER
- SCREW
Parts List for DCD790D2 Type 1
Item number Description
1
2
3
5
6
7
8 SCREW,TORX
9
10 BIT CLIP HOLDER
11 MACHINE SCREW
13
23
24 LABEL WARNING TRI-LI
25 RATING LABEL
30
3 Gear transmission
3.1 Epicyclic gear train
“Planetary_Gear_White_Paper.pdf” in “Drill_driver_user_doc” folder will help you to link
words to the figure:
Power input
Ring gear Input shaft
Planetary carrier Sun gear
(Planet gears carrier)
Output shaft
Planet gears
(Pinion gears)
Power output
3.2 Mechanical principle
To fill in the table below, and according to the fact that one gear has been fixed, find out:
- which gear is used as the effort transmission input,
- which gear is used as the effort transmission output,
- which torque level will be dragged.
Using Stationary Power input Power output
form gear gear
1 Ring gear
2 Planetary carrier
3 Sun gear
1 helpful website: http://bl.ocks.org/mbostock/1353700
and 3 helpful videos,
in 'Eplicyclic_Gear_Train_animation” folder: “Planetary_gear_animation.flv”
“Epicyclic_planetary_gear_animation.flv”
“CDX_Planetary_Gears.flv”
Drill driver gear box part diagram
Between all present videos in “Drill_driver_gearbox_animation” folder, select the one which is the
most representative of the DeWALT drill driver gearing.
Draw a block diagram or a table to show and explain how all gears run. (Don't worry about the gear
shifter, and the forward/reverse button).
3.3 Gear transmission parts manufacturing
Choose the names of the manufacturing process in the list below and fill in the table.
You'll find some useful explanations in “Manufacturing_process_videos” folder.
Extrusion, drilling, forming, forging, spinning, curving, turning, milling, stamping, cutting,
grinding, dividing, engraving, twisting, flexing, pressing, thermo forming, injection molding,
compression molding, blow molding, ...
Part Part name Material Manufacturing process
number
33 Ball
36 Spring
39 Screw
45 Gear
58 Shifter
59 Wire
4 Battery efficiency
4.0 AH: “Giving you more runtime to get the job done”
Search on the web a serious technical comparison about battery technology, and make your own
opinion regarding to sustainable development.
Find good reasons to explain why DEWALT use XR LI-ION 18V 4.0AH batteries in the
assembly of its wireless drill drivers.
Is this battery a RoHS component? ( ...and what does-it mean? )
At the end of its life time, how will it be recycled?
What do you think about new XR LI-ION 18V 5.0AH battery?
5 WEEE recycling management
Find out what WEEE means.
Is there any European directive we must apply in manufacturing? And what is this directive?
Have a look at recycling videos in “Recycling_process_videos” folder, and describe a possible
recycling process for this tool.
6 Video sound track production (used for your assessment)
You must convince us that this new drill driver is really a progressive equipment!
With all interesting information you got, create the sound track so useful to explain what is shown in
the video “Intelligent_Power_Tools_-_Dewalt_XR.flv” you've already seen in “DeWALT_videos”
folder. (Be sure of your pronunciation to be understood; help yourself with www.freedictionary.com
website)
You could return your production in a new video file called
“TSTI2D_ClassName_YourName_YourFirstName.MP4”, or
“TSTI2D_ClassName_YourName_YourFirstName.FLV”, or
….
or simply in a .MP3 file called “TSTI2D_ClassName_YourName_YourFirstName.MP3”,
put on the lycée web server (SE3) in a folder called “TSTI2D_ETLV1” in your own volume.
