Group 1 - Black & Decker Drill/RFP
Group 1 consists of the following members:
Bryant Carlson (3D Modeling Lead, Reassembly Aide):
Bryant attends the University of Buffalo as a student in the field of Mechanical Engineering. He is working toward earning his B.S. in the subject in 2012 and subsequently entering into the contemporary work force. Bryant aspires to graduate on par with his most affluent peers and gain acceptance into graduate school following the completion of the university’s undergraduate curriculum. In addition to his regular school work, Bryant hopes to acquire a position as an intern at a local engineering firm before his graduation. Bryant is still considering pursuing a dual major in aerospace and mechanical engineering, but wishes to attain a minor in Music Studies by the end of the 2012 school year as well.
Bryant's project role responsibility are:• Provide accurate 3D models depicting internal components by deliverable date
• Asssist the Reassembly Lead in product reassembly
Nicolas Hennings (Public Relations, Editor, Disassembly Aide):
Nicolas earned his A.S. in Mathematics from Erie Community College in 2008 after being honorably discharged from the Marine Corps. In the summer of 2009, he worked at Fidelis Asset Management as an Information Technology Specialist. He is currently attending the University at Buffalo with an anticipated major in Mechanical Engineering. After Nicolas graduates, he plans to continue his education with graduate school (part-time) while pursuing a career in a related engineering field.
Nicolas' project role responsibilities are:• Communicate between group members and professor/ teaching assistant
• Assist Disassembly Lead in product dissection
Nicole Kurczewski (Disassembly/ Reassembly Lead, Photographer):
Nicole has earned her A.A.S. in Drafting Technology in 2006 from Erie Community College. After receiving her degree, Nicole began working as a mechanical and plumbing drafter at Buffalo Engineering, P.C., which is a mechanical, electrical, plumbing and energy consulting firm. At Buffalo Engineering, she helped prepare detailed working diagrams of HVAC and Plumbing systems and equipment, including dimensions, fastening methods, and other engineering information. She also worked on heat loss/gain calculations and checking specification sheets for plumbing and heating equipment. Nicole is currently taking classes at the University at Buffalo to obtain a B.S. in Mechanical/Aerospace Engineering. Once graduated, Nicole would like to obtain a position in the manufacturing or biomedical industry.
Nicole's project role responsibilities are:• Provide tools/ location for product disassembly/ reassembly
• Document actual dissection process
• Inventory actual product components
• Photograph individual product components
Ryan McLaughlin (Project Manager, Class Presenter, Website Developer):
Ryan began his pursuit of a B.S. in Mechanical Engineering in 2008 after serving five years as a parachute infantryman in the U.S. Army’s 82nd Airborne Division. During his first semester of school, Ryan headed a feasibility study on the construction of a wastewater treatment plant at the State University of New York at Buffalo’s North Campus. In the summer between Ryan’s freshman and sophomore years, he performed preliminary studies on a pilot “freshman engineering” intro class. Currently, he is a student assistant for an EAS 140 lab where he mentors and performs first line supervisory duties for incoming freshman students. While undecided as to whether he will pursue post-grad education, he sees his future in the field of prosthetics.
Ryan's project role responsibilities are:• Manage and delegate work
• Present dissection process and findings
• Produce a clear Wiki web page
The Gantt chart above is a visual representation of when each task and sub-task should be started and completed. In order to complete required tasks an informal group meetings will be held on Mon-Wed-Fri at 1700hrs outside of Norton 112 with a formal sit-down meeting Sundays 1500-1700hrs at Nicolas Hennings' residence.
Informal Meetings: A chance for individual group members to state current problems and request additional help. These meetings will also reinforce continual progress by keeping the topic fresh in mind.
Formal Meetings: A weekly meeting where specific tasks are delegated and progress is discussed. Additionally, task leads will identify exact times that they will be performing their designated tasks in order to allow each group member equal participation.
Any conflicts will be resolved during the weekly meetings and will be aired to the whole group.
Individuals that fail to accomplish assigned tasks, or that repeatedly miss the formal meeting, will be identified to the professor.
Although group 1 is a tight-knit and cohesive group, they are not perfect. The combination of strengths and weakness described in Table 2 yields a group that has a majority of the skills needed to complete the given task:
• A public speaker
• A strong writer
• An individual with prior 3D modeling experience
• An experienced project manager
But, the main flaw of the group is time management/ procrastination. To counteract this flaw, the previously described combination of formal and informal meetings, along with task delegation, has been established.
|Bryant Carlson||•Prior Knowledge of 3D Modeling
•Good Academic Engineering Knowledge
|•Not a Leader |
•Poor Public Speaker
|Nicole Kurczewski||•Works Well in Group Settings
•Personal Access to Required Tools
•Poor Public Speaker
•Strong Academic Skills
|•No Prior Tool Dissection Experience |
•Poor Public Speaker
|Ryan McLaughlin||•Strong Leader
•Good public Speaker
•Dedicated to Project Completion
•No Prior Web Development Experience
Prior to dissecting the product, the group performed an initial product assessment to determine characteristics of the product, tools required to dissect the product, materials that make up the product, and a preliminary plan to dissect the product.
Initial Product Assesment
|Specification Sheet |
|Manufacturer||Black & Decker|
|Shipping Weight||6.00 lbs|
|Chuck Size||3/8" Chuck|
|Maximum Torque||12.50 Foot-Pounds|
|Max. No Load RPM Speed||0-1350 RPM|
|Max. Capacity Wood||1"|
|Max. Capacity Metal||3/8"|
|Body Style||Standard Body - Plastic|
|Special Features||Reversible Trigger; Variable Speed Trigger|
|Switch Style||Trigger Switch|
|Color||Black and Orange|
|Manufacture's Warranty||3 Years|
Device: Black & Decker® DR202 3/8” Variable Speed/Reversible Drill
Section 1: Intended Usage
This product is an assembly tool. It is used to create holes in materials for various purposes such as a peg or screw placements. It can also be used to place screws into materials with a different drill bit.
a.) This product is built mostly for home "do it yourself" projects based on its drilling power and durability. Large companies would use more professional and exact drill presses when a drill is needed. It could, however, also be used by smaller companies and contractors who cannot afford the more expensive presses or need a more portable drill.
b.) This product functions as a tool for the assembly of other products. It creates holes in the products where circular pegs or screws can be inserted to connect different materials or pieces of material. Different drill bits can be used for the placement of screws into the material desired.
Section 2: Workings of the Device
This product most likely uses an internal motor to convert electrical energy from the power supply into angular rotation in the drill head. Gears are used inside to adjust torque to power ratios and external triggers and switches are used for operation. A power cord supplies electrical power from a standard wall outlet to the device.
a.) First, the product draws AC electrical power out of a wall outlet. Next, the electrical power is converted into rotational kinetic energy within the drill’s motor. This mechanical energy is transferred through the gears and connections into the drill bit. Although the gears change the torque and power that is applied to the bit, the rotational energy is allowed to pass through them without changing form.
b.) The electrical energy from the power cord is transferred into mechanical energy within the drill’s motor, specifically rotational kinetic energy. The output energy from the motor is transferred unchanged into the drill bit, where the device’s desired operation is carried out.
Section 3: Device Functionality
Our device operates in the manner that it should. When the drill is plugged in, it rotates as intended and seems to operate at an acceptable speed without any noticeable problems. Without in-depth experimentation, it is impossible to tell if the drill still outputs the power and torque, which is specified, but since it runs on AC power and battery depletion is not a problem, there is no immediately-evident reason to expect operation below the desired levels.
Section 4: Device Complexity
Many hand tools are available with a much lower complexity level than our electric drill. This drill has to convert electrical energy to mechanical energy, which is an inherently complex process. The gear arrangements within the drill are likely relatively simple by modern industrial standards and the motor is probably of a generic small electric variety. Industrial drill presses exist which operate on a much more complex level. Greater demand for exactitude requires more mechanically complex gear arrangements and operation of these more exact presses is often computerized, a process which greatly increases the drill’s complexity. The standard home power drill is of mid-range complexity when compared to tools used in all other environments.
a.) This drill has many more components than a hand drill, but significantly less than any professional press. Several working parts combined with casings, power supply components, and operation levers make it a complex product, though not as complex as most high-grade tools. According to this page this drill consists of approximately 30 different pieces.
b.) The small motor and gear ratios are simple by industrial standards, but complex to an amateur in that they are small and made to operate at very high speeds. The motor itself can most likely be broken down into a number of smaller components and its assembly can become complex. The gears are probably in a simple ratio, but fit together exactly and in a small area. If the switches and trigger do not work mechanically, but through a microchip, the complexity level of the drill would be increased.
Section 5: Materials
Most materials in this product are hidden beneath the external casing, despite this it is not difficult to deduce the main materials that must be used in the drill’s operation.
a.) The visible materials of the product consist mostly of the external shell, which is constructed of plastic. Other visible materials include:• A plastic trigger and switches which help control the operation of the drill; visible where they protrude from the plastic shell
• A steel drill head where a drill bit would be attached
• A copper core and PVC coated electrical cord, which connects the drill to a power supply
• Multiple steel screws; these are used to hold the frame together
b.) Most of the materials used in the mechanical operation of this drill are not visible without disassembly but the group can assume that these include:• Steel gears connected to the motor and the drill head
• A motor which consist of steel, copper, carbon and plastic, which converts the electrical energy to mechanical energy
• The internal power wires connecting the power cord to the motor which are similar to the power cord in composition
• A steel pinion which connects to a type of axle
• A plastic and carbon microchip, if the operation of the drill is governed by one
Section 6: Ease of Use
This drill seems to be more than suitable for typical home use. It appears durable, being made out of strong plastic, and feels heavy without being bulky. When our group plugged the drill in for a test, it seemed to have plenty of power for normal household construction or repair tasks. It is also compact and comfortable, seeming to have a functional and ergonomic design.
a.) This product is very comfortable to use. The drill fit all of our hands surprisingly well despite our different sizes. It is just heavy enough to feel durable without being too heavy to use, it can easily be held in any position for a long period. Although we did not complete any actual construction projects with the drill, it would surely be comfortable to use throughout the project.
b.) This product is very simple to use as long as the operator knows how to use any brand of power drill. The foreword/reverse switch is clearly marked and the trigger is obviously used to operate the drill. The only confusion in operation may be a result of a bit change, in which the keyless chuck must be used to loosen the old bit and tighten the new one. This is a difficultly inherent in any drill with removable bits and as long as the operator is familiar with the standard replacement procedure, they will be able to replace a bit on this drill.
c.) This product requires no evident maintenance; since it receives its power from a wall outlet, even a regular battery change is not necessary.
Section 7: Product Alternatives
There are many brand name alternatives to this exact drill, which are, overwhelmingly, closely comparable in cost and performance. Two true alternatives to the Black & Decker® drill as a product are the manually-powered hand drill and the professional drill press.
a.) The manually-powered hand drill is less expensive than the Black & Decker® drill, at about $20, as many of the complex components in the Black & Decker® drill are not contained in the manually-powered hand drill. The drill press is much more expensive ($100s to $1000s) than a power hand drill, as it is larger and more complex.
b.) The manually-powered hand drill only has one advantage besides cost: it has a power supply wherever you decide to take it since you power it yourself. The drill press is advantageous because it is much more exact in its usage. When used professionally, it can be put on an assembly line to make very exact holes relatively quickly. On the other hand, this power drill does have one added benefit, it can drive and remove screws.
c.) The manually-powered hand drill is undesirable in most cases because a lot of human energy is used to make a single hole. It is slow, tedious, and very inexact in any situation. The drill press has a disadvantage in its fixed position; no drill press can be moved easily or used for a task requiring mobility, such as screwing siding onto a home.
Anticipated Tools Required
Diagram 3 references anticipated tools required in order to properly dissect the drill:
|Protective Lenses||Protect eyes from potential injury due to physical agents|
|Screwdriver - Philips Head - Size 0||Remove Philips head screws|
|Screwdriver - Philips Head - Size 1||Remove Philips head screws|
|Screwdriver - Slotted Head - Size 0||Remove slotted head screws|
|Screwdriver - Slotted Head - Size 1||Remove slotted head screws and assist in separating outer casing|
Anticipated Construction Materials
Diagram 4 references anticipated materials and why they would be chosen:
|Material Nomenclature||Reason For Assumption|
|Copper||General material used for wiring|
|Molded Plastic||Visible material of case; lightweight; inexpensive; can be easily formed into complex shapes|
|Rubber||Visible on the grip; helps to reduce hand fatigue|
|Zinc||Inexpensive; lightweight; metallic|
Diagram 5 references anticipated components:
|Component Nomenclature||Reason For Assumption|
|Gears||Gear reduction would provide a small motor with enough torque to turn screws; switch between clockwise and counter-clockwise rotation|
|Level and Level Fluid||General material used for wiring|
|Motor||Converts electrical energy into mechanical energy|
|Screws - Philips head||Visible|
Upon initial inspection of our product, the group has decided that the following steps will be taken to disassemble the product:
1. Remove the (9) screws from the housing, and set aside
2. Pull the top part of the housing off and set aside
3. Remove the power cord, trigger and switch
4. Remove the level and the bit holder
5. Remove the chuck key and set aside for further inspection and dissection
6. Remove the motor, gears and fan, set each aside for further dissection and inspection as well
Some challenges that may be faced during the disassembly/reassembly process could be, using the wrong tool, a part may become stuck, breaking a part, losing/misplacing pieces, and/or not remembering how the pieces go back together. To mitigate the risk of a failed reassembly, disassembly procedure will be documented, step by step, and will be photographed.
The initial dissection of the drill will take approximately 30-45 minutes to accomplish. All steps from start to finish of the actual dissection and reassembly will be timed and recorded, as well as the actual difficulty level of each step, providing a more accurate timeline of the disassembly/reassembly process.
 "Model # DR202 Spec. Sheet." Toolbarn.com. 06 OCT 2009 <http://www.toolbarn.com/blackdecker-dr202.html>
 “How Stuff Works: Power Drill.” How Stuff Works. 05 Oct 2009 <http://home.howstuffworks.com/power-drill.htm>