Group 1 - Black & Decker Drill

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==Introduction==
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On September 25, group 1 was tasked by course MAE 277 (SUNY BUFFALO) to reverse engineer a Black & Decker® drill while paying specific attention to its various aspects of design and manufacturing.  The purpose of this project is to reinforce group work skills, technical writing skills and introduce the design process in order to better prepare students for industry. <br><br>
 +
Tabulated data will be compiled using Microsoft Excel to create tables and charts, and Computer-Aided-Design to produce models of Black & Decker® drill components. The compiled information will be uploaded to the internet utilizing a design repository and will be in MediaWiki format.<br><br>
 +
The group has until December 11 to take a functional Black & Decker® drill and: disassemble/reassemble, upload data to MediaWiki, and perform a 6-minute presentation to the fall 2009 MAE 277 class. To ensure that the group stays on task and continues to make forward progress, a series of 4 stages has been established at which point certain criteria must be completed. The group has roughly two months to complete these four stages and their accompanying due dates are:<br>
 +
<blockquote>• Request for Proposal – 10/9/09 <br>
 +
      • Preliminary Project Review – 10/30/09 <br>
 +
      • Coordination Review – 11/23/09 <br>
 +
      • Critical Project Review – 12/7/09
 +
              <blockquote><em>*each stage has additional sub-tasks: see [http://gicl.cs.drexel.edu/wiki-data/index.php?title=Group_1_-_Black_%26_Decker_Drill/RFP#Time_Management Diagram 1]  for the complete Gantt chart</em></blockquote></blockquote>
 +
 
==Executive Summary==
 
==Executive Summary==
 
The Black & Decker® DR202 3/8” Variable Speed/Reversible Drill is a must-have tool for almost any project. This six-pound power tool is light enough to be used for the everyday 'do it yourself' tasks while the five-amp motor is powerful enough for professional carpentry and construction jobs.<br><br>
 
The Black & Decker® DR202 3/8” Variable Speed/Reversible Drill is a must-have tool for almost any project. This six-pound power tool is light enough to be used for the everyday 'do it yourself' tasks while the five-amp motor is powerful enough for professional carpentry and construction jobs.<br><br>
 
The main purpose of the DR202 is to drive and remove screws, and drill holes through various materials such as dry wall, steel, soft and hard woods, and plastics.  It operates by taking electrical energy supplied by a standard household power outlet which it converts to rotational energy used within the motor.  The rotational energy is transferred to mechanical energy, moving the gears within the motor, which supplies the torque to move the bit. It has variable speed: the farther the trigger is depressed, the higher the speed of the drill.  The drill can also be locked for continuous use by squeezing the trigger while pushing in on the trigger lock mechanism.  Additionally, the drill has a 8’ electrical cord with a two-prong plug.  It has a direction reverse switch: push the switch to the right for forward rotation (clockwise rotation), push the switch to the left for reverse rotation (counterclockwise).  The drill has a fifteen-position keyless chuck and a convenient bit holder located on top of the drill.
 
The main purpose of the DR202 is to drive and remove screws, and drill holes through various materials such as dry wall, steel, soft and hard woods, and plastics.  It operates by taking electrical energy supplied by a standard household power outlet which it converts to rotational energy used within the motor.  The rotational energy is transferred to mechanical energy, moving the gears within the motor, which supplies the torque to move the bit. It has variable speed: the farther the trigger is depressed, the higher the speed of the drill.  The drill can also be locked for continuous use by squeezing the trigger while pushing in on the trigger lock mechanism.  Additionally, the drill has a 8’ electrical cord with a two-prong plug.  It has a direction reverse switch: push the switch to the right for forward rotation (clockwise rotation), push the switch to the left for reverse rotation (counterclockwise).  The drill has a fifteen-position keyless chuck and a convenient bit holder located on top of the drill.
 
{| border="3" cellspacing="0" cellpadding="3" align="center"
 
{| border="3" cellspacing="0" cellpadding="3" align="center"
! width="150" |[[Image:group_1_BDSide.JPG|thumb|Side view of Black and Decker DR202 Drill]]
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! width="200" |[[Image:group_1_BDSide.JPG|195px|thumb|Side view of Jigsaw]]
! width="150" |[[Image:group_1_BDTop.JPG|thumb|Top view of Black and Decker DR202 Drill]]
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! width="200" |[[Image:group_1_BDTop.JPG|195px|thumb|Offset View of Jigsaw]]
! width="150" |[[Image:group_1_BDFront.JPG|thumb|Front view of Black and Decker DR202 Drill]]
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! width="200" |[[Image:group_1_BDFront.JPG|195px|thumb|back view]]
 
|}
 
|}
  
 
==Gate 1: Request For Proposal==
 
==Gate 1: Request For Proposal==
 
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The below link navigates to the <u>Gate 1: Request For Proposal</u> page which outlines:
 +
<blockquote>Group Members' Backgrounds<br>
 +
Proposed Time Management<br>
 +
Group Dynamic Analysis<br>
 +
Pre-Dissection Analysis</blockquote>
 
[http://gicl.cs.drexel.edu/wiki-data/index.php?title=Group_1_-_Black_%26_Decker_Drill/RFP Request of Proposal Page]
 
[http://gicl.cs.drexel.edu/wiki-data/index.php?title=Group_1_-_Black_%26_Decker_Drill/RFP Request of Proposal Page]
  
 
==Gate 2: Preliminary Design Review==
 
==Gate 2: Preliminary Design Review==
Gate 2 consists of two parts: cause for corrective action and a step-by-step disassembly of the drill. The cause for corrective action allows for the group to reflect on the first three weeks of the reverse engineering project and tweak the group's planned approach. The step-by-step disassembly process is meant to provide a person, that is unfamiliar with the drill, with a set plan that will allow him or her to break down the drill. To facilitate the disassembly process, a parts list, which provides part nomenclatures, quantities and photographs, along with end-step photographs are provided.<br>
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The below link navigates to the <u>Gate 2: Preliminary Design Review</u> page which outlines:
===Causes for Corrective Action===
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<blockquote> Gate 2 Purpose<br>
As the group moves toward the dissection of the Black & Decker Power Drill, it is necessary to do an assessment of the work completed thus far as well as the management plan. Fortunately, the project has moved along smoothly with no major setbacks.<br><br>
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Cause For Corrective Action<br>
The group was able to communicate their strengths, weaknesses, and schedules effectively during the management proposal processes so that we could progress with very little deviation from the original plan. In fact, we have found only one aspect of our management proposal that needed editing. We had originally agreed that a group meeting would be necessary every Sunday afternoon to collaborate on group progress and to address any issues. However, it was quickly realized that this weekly meeting was not realistic when group members would have to commute 30 minutes one-way in order to attend a meeting that might last 15 minutes; our group sits together for lecture three times a week and any concerns can be brought forward in person during that time. Furthermore, the few questions group members have come up with that had to be immediately addressed, were effectively acknowledged and resolved via e-mail and phone conversations.<br><br>
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Parts List<br>
At this time, there are no unresolved challenges or potential problems therefor no other corrective actions need to be taken to complete the project as scheduled--the management plan was made flexible enough to account for any changes that may be necessary in the coming weeks.
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Product Dissection Plan<br>
 +
Post-Dissection Analysis</blockquote>
 +
[http://gicl.cs.drexel.edu/wiki-data/index.php?title=Group_1_-_Black_%26_Decker_Drill/PDR Preliminary Design Review Page]
  
=== Parts List ===
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==Gate 3: Coordination Review==
The "Parts List" table below provides a list of the components that will be observed during the disassembly process.<br>
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The below link navigates to the <u>Gate 3: Coordination Review</u> page which outlines:
{| border="3" cellspacing="0" cellpadding="3" align="center"
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<blockquote> Gate 3 Purpose<br>
!style="background:aqua; color:black" colspan="9" align="center"| <b>Part List</b> [http://www.dewaltservicenet.com/Products/DocumentViewPDF.aspx?productid=33258&typeId=8795&documentId=21976&AspxAutoDetectCookieSupport=1]
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Cause For Corrective Action<br>
 +
Component Summary<br>
 +
Design Revisions<br>
 +
Solid Modeled Assembly<br>
 +
Engineering Analysis</blockquote>
 +
[http://gicl.cs.drexel.edu/wiki-data/index.php?title=Group_1_-_Black_%26_Decker_Drill/CR Coordination Review Page]
  
|-
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==Gate 4: Critical Design Review==
|with="75" align="center" |Item Number
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The below link navigates to the <u>Gate 4: Critical Design Review</u> page which outlines:
|align="center" |Nomenclature
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<blockquote> Gate 4 Purpose<br>
|align="center" |Quantity Required
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Product Reassembly Plan<br>
|align="center" |Object Photograph
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Post-Reassembly Analysis</blockquote>
|width="75" |
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[http://gicl.cs.drexel.edu/wiki-data/index.php?title=Group_1_-_Black_%26_Decker_Drill/CDR Critical Design Review Page]
|width="75" align="center" |Item Number
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|align="center" |Nomenclature
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|align="center" |Quantity Required
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|align="center" |Object Photograph
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|-
+
 
+
|-
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| align="center" |1
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| align="center" |Housing and Cover
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| align="center" |1
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| align="center" |[[Image:group_1_Housing_&_cover.JPG|75px|thumb]]
+
|
+
| align="center" |15
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| align="center" |Reverse Ring
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| align="center" |1
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| align="center" |[[Image:group_1_Reverse_ring.JPG|75px|thumb]]
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|-
+
 
+
|-
+
| align="center" |2
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| align="center" |Spindle
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| align="center" |1
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| align="center" |[[Image:Group 1 Spindle.JPG|75px|thumb]]
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|
+
| align="center" |16
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| align="center" |Reverse Lever
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| align="center" |1
+
| align="center" |[[Image:group_1_Reverse_lever.JPG|75px|thumb]]
+
|-
+
 
+
|-
+
| align="center" |3
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| align="center" |Gear
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| align="center" |1
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| align="center" |[[Image:Group_1_Gear.JPG|75px|thumb]]
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|
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| align="center" |17
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| align="center" |VS Switch
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| align="center" |1
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| align="center" |[[Image:group_1_VS.JPG|100px|thumb]]
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|-
+
 
+
|-
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| align="center" |4
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| align="center" |Washer
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| align="center" |1
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| align="center" |[[Image:Group_1_Washer_4.JPG|75px|thumb]]
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|
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| align="center" |18
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| align="center" |Cord – 8ft
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| align="center" |1
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| align="center" |[[Image:group_1_Cord.JPG|75px|thumb]]
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|-
+
 
+
|-
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| align="center" |5
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| align="center" |Front Bearing Plate
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| align="center" |1
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| align="center" |[[Image:group_1_Front_bush.JPG|75px|thumb]]
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|
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| align="center" |19
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| align="center" |Cord Protector
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| align="center" |1
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| align="center" |[[Image:group_1_Cord_Protector.JPG|75px|thumb]]
+
|-
+
 
+
|-
+
| align="center" |6
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| align="center" |Keyless Chuck
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| align="center" |1
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| align="center" |[[Image:group_1_True_keyless_chuck.JPG|75px|thumb]]
+
|
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| align="center" |20
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| align="center" |Clamp, Cord
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| align="center" |1
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| align="center" |[[Image:group_1_Clamp,cord.JPG|75px|thumb]]
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|-
+
 
+
|-
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| align="center" |7
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| align="center" |Rear Bearing Plate
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| align="center" |1
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| align="center" |[[Image:group_1_Rear_brg._plt._assy.JPG|75px|thumb]]
+
|
+
| align="center" |21
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| align="center" |3/4" Screw with #15 Torx heads
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| align="center" |11
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| align="center" |[[Image:group_1_(2)_clamp,_cord_screws.JPG|75px|thumb]]
+
|-
+
 
+
|-
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| align="center" |8
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| align="center" |Gear and Pinion
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| align="center" |1
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| align="center" |[[Image:group_1_Gear_&_pinion.JPG|75px|thumb]]
+
|
+
| align="center" |22
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| align="center" |1 7/8" Screw with #15 Torx heads
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| align="center" |2
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| align="center" |[[Image:Group_1_(2)_field_screws.JPG|75px|thumb]]
+
|-
+
 
+
|-
+
| align="center" |9
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| align="center" |Armature
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| align="center" |1
+
| align="center" |[[Image:group_1_Armature.JPG|75px|thumb]]
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|
+
| align="center" |23
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| align="center" |Name Plate
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| align="center" |1
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| align="center" |[[Image:group_1_Label_(2).JPG|75px|thumb]]
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|-
+
 
+
|-
+
| align="center" |10
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| align="center" |Retaining Ring
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| align="center" |1
+
| align="center" |[[Image:group_1_Retaining_ring.JPG|75px|thumb]]
+
|
+
| align="center" |24
+
| align="center" |Brush
+
| align="center" |2
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| align="center" |[[Image:group_1_Brush.JPG|75px|thumb]]
+
|-
+
 
+
|-
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| align="center" |11
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| align="center" |Washer, Plain
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| align="center" |1
+
| align="center" |[[Image:group_1_Washer,_plain.JPG|75px|thumb]]
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|
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| align="center" |25
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| align="center" |Washer, Felt
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| align="center" |1
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| align="center" |[[Image:group_1_True_Felt_Washer.JPG|75px|thumb]]
+
|-
+
 
+
|-
+
| align="center" |12
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| align="center" |Sink, Heat
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| align="center" |1
+
| align="center" |[[Image:group_1_Sink,heat.JPG|75px|thumb]]
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|
+
| align="center" |26
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| align="center" |Cap
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| align="center" |1
+
| align="center" |[[Image:group_1_Cap.JPG|75px|thumb]]
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|-
+
 
+
|-
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| align="center" |13
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| align="center" |Washer, Red
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| align="center" |1
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| align="center" |[[Image:group_1_Felt_Washer.JPG|75px|thumb]]
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|
+
| align="center" |27
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| align="center" |Level
+
| align="center" |1
+
| align="center" |[[Image:group_1_Level.JPG|75px|thumb]]
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|-
+
 
+
|-
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| align="center" |14
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| align="center" |Field
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| align="center" |1
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| align="center" |[[Image:group_1_Field.JPG|75px|thumb]]
+
|
+
| align="center" |28
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| align="center" |Bit Holder
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| align="center" |1
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| align="center" |[[Image:group_1_Bit_holder.JPG|75px|thumb]]
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|-
+
|}<br><br>
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The below "Assembly Component List" identifies assembly groups, as defined by the group, mentioned during the disassembly process.<br>
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{| border="3" cellspacing="0" cellpadding="3" align="center"
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!style="background:aqua; color:black" colspan="4" align="center"| <b>Assembly Component List</b>
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+
|-
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|with="75" align="center" |Assembly Number
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|align="center" |Assembly Name
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|align="center" |Assembly Components
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|align="center" |Assembly Photograph
+
|-
+
 
+
|-
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|with="75" align="center" |1
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|align="center" |Internal Assembly
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|align="center" |Motor Assembly<br>Rear Bearing Plate<br>Gear and Pinion<br>Keyless Chuck Assembly
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|align="center" |[[Image:Group_1_Internal_assembly.JPG|75px|thumb]]
+
|-
+
 
+
|-
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|with="75" align="center" |2
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|align="center" |Motor Assembly
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|align="center" |Field<br>Reverse Ring<br>(2)Brushes<br>(2)1 7/8" Screw with #15 Torx heads<br>Armature Assembly
+
|align="center" |[[Image:group_1_Motor_Assembly.JPG|75px|thumb]]
+
|-
+
 
+
|-
+
|with="75" align="center" |3
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|align="center" |Armature Assembly
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|align="center" |Retaining Ring<br>Heat Sink<br>Plain Washer<br>Red Washer<br>
+
|align="center" |[[Image:Group_1_Armature_assembly.JPG|75px|thumb]]
+
|-
+
 
+
|-
+
|with="75" align="center" |4
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|align="center" |Keyless Chuck Assembly
+
|align="center" |Gear<br>Front Bearing Plate<br>Spindle<br>Felt Washer<br>Keyless Chuck
+
|align="center" |[[Image:Group_1_Keyless_chuck_assembly.JPG|75px|thumb]]
+
|-
+
|}
+
 
+
===Product Dissection Plan===
+
The "Product Dissection By Steps" table seen below details a step-by-step process for dissecting the drill. Special attention should be focused on:
+
<blockquote><b>The removal of the retaining ring:</b> Its size, in combination with the required force to remove it, can launch the clip in an unexpected manner. A small box, about the size of a shoebox, is recommended during this process.<br><br>
+
<b>The orientation of the heat sink:</b> The heat sink can be attached from either end. The wrong way will make the armature too short and it will no longer fit properly into the casing.</blockquote>
+
It is recommended that photographs of both parts and stages be used as aides during the disassembly process.<br><br>
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<B>Tools required:</B><br> <blockquote>Torx #15 screw driver<br>
+
0.5mm Flat-head screw driver</blockquote>
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*<I>The drill was in full working order prior to dissection and was unplugged.</I><br><br>
+
 
+
 
+
{| border="3" cellspacing="0" cellpadding="3" align="center"
+
!style="background:aqua; color:black" colspan="6" align="center"| <b>Product Dissection By Steps</b>
+
 
+
|-
+
| width="75" align="center" |Step
+
| width="500" align="center" |Description
+
| width="250" align="center" |Tool Required
+
| width="100" align="center" |Time Required
+
| width="75" align="center" |Difficulty (1-3)
+
| align="center" |End-Step Photograph
+
|-
+
 
+
|-
+
| align="center" |1
+
| align="center" |Removed the (9) screws from the drill housing that secure it shut
+
| align="center" |Torx 15 screw driver
+
| align="center" |2:15
+
| align="center" |1
+
| align="center" |[[Image:group_1_Step_1.JPG|100px|thumb|Exterior]]
+
|-
+
 
+
|-
+
| align="center" |2
+
| align="center" |Separated each external component from drill housing: the exterior cover was lifted away allowing for easy access to the level and bit holder located on the top of the drill housing
+
| align="center" |Hands
+
| align="center" |1:45
+
| align="center" |1
+
| align="center" |[[Image:group_1_Step_2.JPG|100px|thumb|Exterior Cover and Parts]] [[Image:group_1_Step_3.JPG|100px|thumb|Interior]]
+
|-
+
 
+
|-
+
| align="center" |3
+
| align="center" |Removed the metallic cord clamp which secures power cord
+
| align="center" |Torx 15 screw driver
+
| align="center" |0:54
+
| align="center" |1
+
| align="center" |[[Image:group_1_Step_3b.JPG|100px|thumb|Power Clamp Removed]]
+
|-
+
 
+
 
+
|-
+
| align="center" |4
+
| align="center" |Removed VS switch from drill housing by lifting it out
+
| align="center" |Hands
+
| align="center" |0:10
+
| align="center" |1
+
| align="center" |[[Image:group_1_Step_4.JPG|100px|thumb|Trigger Housing Removed]]
+
|-
+
 
+
 
+
 
+
|-
+
| align="center" |5
+
| align="center" |Slid reverse lever from its grove in the drill housing
+
| align="center" |Hands
+
| align="center" |0:10
+
| align="center" |1
+
| align="center" |[[Image:Group_1_Step_5.JPG|100px|thumb|Direction Switch Removed]]
+
|-
+
 
+
|-
+
| align="center" |6
+
| align="center" |Lifted internal assembly from the drill housing where it was held in place by groves<br><br><br><B> Take special note of the orientation of all internal parts. When replacing internal assembly notice that the white power cord is on top and that the smooth side of the heat sink is away from the motor</b>
+
| align="center" |Hands
+
| align="center" |0:45
+
| align="center" |1
+
| align="center" |[[Image:group_1_Step_6.JPG|100px|thumb|Internal Assembly Removed]]
+
|-
+
 
+
|-
+
| align="center" |7
+
| align="center" |Separated internal assembly into motor assembly, keyless chuck assembly, gear and pinion, and the rear bridge plate assembly by sliding each component apart
+
| align="center" |Hands
+
| align="center" |1:23
+
| align="center" |1
+
| align="center" |[[Image:group_1_Step_7.JPG|100px|thumb|Exploded Internal Assembly]]
+
|-
+
 
+
|-
+
| align="center" |8
+
| align="center" |Removed power wires from the rear of the motor assembly by pulling out on the wires, noting that the black wire entered the motor near the hole marked with a "B". <br><br>Removed the armature by compressing the retaining brushes with a flat-head screwdriver, which secured the armature inside of the motor assembly by clamping down on it near the heat sink.  <br><br>Disassembled motor assembly into field and reverse ring by removing (2) field screws.
+
| align="center" |Torx 15 to remove <br><br>(2) flat-head screwdrivers
+
| align="center" |4:39
+
| align="center" |3
+
| align="center" |[[Image:Group_1_Step_8.JPG|100px|thumb|Exploded Motor]]
+
|-
+
 
+
 
+
|-
+
| align="center" |9
+
| align="center" |Carefully removed retaining ring from rear of armature by applying pressure with two flat-head screwdrivers on the tails of the "C" shaped clamp--two screwdrivers are required to prevent the retaining ring from rotating as the clamp is slid off. The armature should be placed inside of a box in order to maintain control of the retaining ring when it is forced off. Removal of the ring allowed for the separation of a washer and the heat sink.
+
| align="center" |(2) flat-head screwdrivers <br><br>small box (6" x 4")
+
| align="center" |3:27
+
| align="center" |3
+
| align="center" |[[Image:Group_1_Step_9.JPG|100px|thumb|Exploded Motor Shaft]]
+
|-
+
|}
+
<b>Total dissection time: 14 minutes, 12 seconds.</b><br>
+
<b>*Note</b>: the break down for the difficulty levels are as follows:
+
<blockquote>1 = easy; requiring little effort.<br>
+
2 = medium; some prior thinking required.<br>
+
3 = hard; required multiple attempts; two people recommended.</blockquote><br><br>
+
  
<b>- Is the product intended to be taken apart easily?</b>
+
==About Us==
<blockquote>Based upon the disassembly described above and the fasteners used, which can be easily removed and replaced, this product is, in fact, intended to be taken apart easily. All but two steps were rated as a 1 out of 3 on the difficulty scale and the whole dissection process took two people a little over fourteen minutes. Step 8 received a difficulty rating of 3 because the group failed to take specific note of which wire went in which hole on the reverse ring and because the removal of the armature was not immediately apparent and was best accomplished by two people: one person compressing the brushes while the second slides the armature out. Step 9 received a difficulty rating of 3 due to the retaining ring: the removal of the ring requires two people to push it off and the group underestimated the effect of the force and the resulting acceleration of the ring once it was released from its position. Luckily, the floor was white and the ring showed up easily on the linoleum. The rest of the steps consisted of either removing some screws or lifting components held in place by molded plastic.<br><br> The ease of disassembly is a benefit of the drill such that it allows for broken or worn pieces to be easily replaced by the user as opposed to a more complex drill where someone would have to be paid to fix it.</blockquote>
+
The below link navigates to a subsection of <u>Gate 1: Request For Proposal</u> page which provides a short biography of each team member.
  
<b>- What fasteners are used and why?</b>
+
[http://gicl.cs.drexel.edu/wiki-data/index.php?title=Group_1_-_Black_%26_Decker_Drill/RFP#Backround About Us]
<blockquote>The fasteners used are:<blockquote>
+
(11) 3/4" Screws with #15 Torx heads: These metallic screws are a non-permanent, inexpensive and effective way to secure lightweight materials while minimizing assembly/disassembly time.<br>
+
(2) 1 7/8" Screws with #15 Torx heads: These metallic screws are a non-permanent, inexpensive and effective way to secure lightweight materials while minimizing assembly/disassembly time.</blockquote>
+
<i>The manufacturer, by using all the same Torx head screws, can keep production time and costs down by reducing the number of different tools required to assemble the product.</i></blockquote>
+
<b>- Are special tools required?</b>
+
<blockquote> No special tools other than the Torx #15 were required, but pictures taken from a digital camera during disassembly will provide a visual aid that can be relied upon for reassembly.</blockquote>
+
  
 
==Contact Us==
 
==Contact Us==
Line 372: Line 61:
  
 
==References==
 
==References==
[1] "DeWalt Service Technical Information" dewaltservicenet.com. 12 OCT 2009 <http://www.dewaltservicenet.com/Products/DocumentViewPDF.aspx?productid=33258&typeId=8795&documentId=21976&AspxAutoDetectCookieSupport=1><br>
+
<B>Gate 1:</B>
 +
<blockquote>[1] "Model # DR202 Spec. Sheet." Toolbarn.com. 06 OCT 2009 <http://www.toolbarn.com/blackdecker-dr202.html><br>
 +
[2] “How Stuff Works: Power Drill.” How Stuff Works. 05 Oct 2009 <http://home.howstuffworks.com/power-drill.htm></blockquote>
 +
<B>Gate 2:</b>
 +
<blockquote>[1] "DeWalt Service Technical Information" dewaltservicenet.com. 12 OCT 2009 <http://www.dewaltservicenet.com/Products/DocumentViewPDF.aspx?productid=33258&typeId=8795&documentId=21976&AspxAutoDetectCookieSupport=1><br></blockquote>
 +
<B>Gate 3:</b>
 +
<blockquote>[1] "DeWalt Service Technical Information" dewaltservicenet.com. 12 OCT 2009 <http://www.dewaltservicenet.com/Products/DocumentViewPDF.aspx?productid=33258&typeId=8795&documentId=21976&AspxAutoDetectCookieSupport=1><br>
 +
[2] “Drill spec sheet”  toolbarn.com 12 OCT 2009 <http://www.toolbarn.com/blackdecker-dr202.html><br>
 +
[3] “Wikipedia: Polyvinyl Chloride” Wikipedia 12 OCT 09 <http://en.wikipedia.org/wiki/Polyvinyl_chloride#Electric_wires></blockquote>

Latest revision as of 20:20, 30 September 2010

Contents

Introduction

On September 25, group 1 was tasked by course MAE 277 (SUNY BUFFALO) to reverse engineer a Black & Decker® drill while paying specific attention to its various aspects of design and manufacturing. The purpose of this project is to reinforce group work skills, technical writing skills and introduce the design process in order to better prepare students for industry.

Tabulated data will be compiled using Microsoft Excel to create tables and charts, and Computer-Aided-Design to produce models of Black & Decker® drill components. The compiled information will be uploaded to the internet utilizing a design repository and will be in MediaWiki format.

The group has until December 11 to take a functional Black & Decker® drill and: disassemble/reassemble, upload data to MediaWiki, and perform a 6-minute presentation to the fall 2009 MAE 277 class. To ensure that the group stays on task and continues to make forward progress, a series of 4 stages has been established at which point certain criteria must be completed. The group has roughly two months to complete these four stages and their accompanying due dates are:

• Request for Proposal – 10/9/09
• Preliminary Project Review – 10/30/09
• Coordination Review – 11/23/09
• Critical Project Review – 12/7/09
*each stage has additional sub-tasks: see Diagram 1 for the complete Gantt chart

Executive Summary

The Black & Decker® DR202 3/8” Variable Speed/Reversible Drill is a must-have tool for almost any project. This six-pound power tool is light enough to be used for the everyday 'do it yourself' tasks while the five-amp motor is powerful enough for professional carpentry and construction jobs.

The main purpose of the DR202 is to drive and remove screws, and drill holes through various materials such as dry wall, steel, soft and hard woods, and plastics. It operates by taking electrical energy supplied by a standard household power outlet which it converts to rotational energy used within the motor. The rotational energy is transferred to mechanical energy, moving the gears within the motor, which supplies the torque to move the bit. It has variable speed: the farther the trigger is depressed, the higher the speed of the drill. The drill can also be locked for continuous use by squeezing the trigger while pushing in on the trigger lock mechanism. Additionally, the drill has a 8’ electrical cord with a two-prong plug. It has a direction reverse switch: push the switch to the right for forward rotation (clockwise rotation), push the switch to the left for reverse rotation (counterclockwise). The drill has a fifteen-position keyless chuck and a convenient bit holder located on top of the drill.

Side view of Jigsaw
Offset View of Jigsaw
back view

Gate 1: Request For Proposal

The below link navigates to the Gate 1: Request For Proposal page which outlines:

Group Members' Backgrounds
Proposed Time Management
Group Dynamic Analysis
Pre-Dissection Analysis

Request of Proposal Page

Gate 2: Preliminary Design Review

The below link navigates to the Gate 2: Preliminary Design Review page which outlines:

Gate 2 Purpose
Cause For Corrective Action
Parts List
Product Dissection Plan
Post-Dissection Analysis

Preliminary Design Review Page

Gate 3: Coordination Review

The below link navigates to the Gate 3: Coordination Review page which outlines:

Gate 3 Purpose
Cause For Corrective Action
Component Summary
Design Revisions
Solid Modeled Assembly
Engineering Analysis

Coordination Review Page

Gate 4: Critical Design Review

The below link navigates to the Gate 4: Critical Design Review page which outlines:

Gate 4 Purpose
Product Reassembly Plan
Post-Reassembly Analysis

Critical Design Review Page

About Us

The below link navigates to a subsection of Gate 1: Request For Proposal page which provides a short biography of each team member.

About Us

Contact Us

Group 1 E-mail

References

Gate 1:

[1] "Model # DR202 Spec. Sheet." Toolbarn.com. 06 OCT 2009 <http://www.toolbarn.com/blackdecker-dr202.html>
[2] “How Stuff Works: Power Drill.” How Stuff Works. 05 Oct 2009 <http://home.howstuffworks.com/power-drill.htm>

Gate 2:

[1] "DeWalt Service Technical Information" dewaltservicenet.com. 12 OCT 2009 <http://www.dewaltservicenet.com/Products/DocumentViewPDF.aspx?productid=33258&typeId=8795&documentId=21976&AspxAutoDetectCookieSupport=1>

Gate 3:

[1] "DeWalt Service Technical Information" dewaltservicenet.com. 12 OCT 2009 <http://www.dewaltservicenet.com/Products/DocumentViewPDF.aspx?productid=33258&typeId=8795&documentId=21976&AspxAutoDetectCookieSupport=1>
[2] “Drill spec sheet” toolbarn.com 12 OCT 2009 <http://www.toolbarn.com/blackdecker-dr202.html>
[3] “Wikipedia: Polyvinyl Chloride” Wikipedia 12 OCT 09 <http://en.wikipedia.org/wiki/Polyvinyl_chloride#Electric_wires>
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