Group 1 - Black & Decker Drill
MAE277 01 09 (Talk | contribs) (→Critical Design Review) |
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The below link navigates to the <u>Gate 4: Critical Design Review</u> page which outlines: | The below link navigates to the <u>Gate 4: Critical Design Review</u> page which outlines: | ||
<blockquote> Gate 4 Purpose<br> | <blockquote> Gate 4 Purpose<br> | ||
| − | + | Product Reassembly Plan<br> | |
Design Revisions<br> | Design Revisions<br> | ||
Solid Modeled Assembly<br> | Solid Modeled Assembly<br> | ||
Revision as of 19:54, 6 December 2009
Contents |
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.
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Gate 1: Request For Proposal
The below link navigates to the Gate 1: Request For Proposal page which outlines:
Project Purpose
Group Members' Backgrounds
Proposed Time Management
Group Dynamic Analysis
Pre-Dissection Analysis
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
Critical Design Review
The below link navigates to the Gate 4: Critical Design Review page which outlines:
Gate 4 Purpose
Product Reassembly Plan
Design Revisions
Solid Modeled Assembly
Engineering Analysis
Product Reassembly Plan
The product's reassembly is best approached by reassembling each "Product Reassembly By Steps" table seen below details a step-by-step process for reassembling the drill.
It is recommended that photographs of parts, assemblies, and stages be used as aides during the disassembly process.
Torx #15 screw driver
Flat-head screwdriver
Needle-nose pliers
| Armature Assembly Reassembly Steps | |||||
|---|---|---|---|---|---|
| Step | Description | Tool Required | Time Required | Difficulty (1-3) | Step Photograph |
| 1 | Slide red washer over rear end of the armature. | Hands | 0:15 | 1 | File:.JPG Red washer replaced |
| 2 | Slide heat sink over rear end of the armature. The fin side of the heat sink should be closes to the armature core. | Hands | 0:15 | 1 | File:.JPG Smooth side of the heat sink File:.JPG Fin side of the heat sink File:.JPG Heat sink replaced |
| 3 | Slide small metalic washer over read end of the armature. | Hands | 0:15 | 1 | File:.JPG Metalic washer replaced |
| 4 | Replace retaining ring to secure all of the components on the end of the armature. Note: The retaining ring is easily replaced by positioning the open side of the "C" shaped clamp against the armature and then squeezing the ring into place with pliers. |
Hands and pliers | 0:15 | 1 | File:.JPG Retaining ring replaced |
| Motor Assembly Reassembly Steps | |||||
|---|---|---|---|---|---|
| Step | Description | Tool Required | Time Required | Difficulty (1-3) | Step Photograph |
| 1 | Slide reverse ring and field together and then secure the two pieces with the 1 7/8"torx screws. Note: The reverse ring can be combined with the field in two ways. To easily identify the proper orientation hold the field in one hand with the serial numbers on top and slide the reverse ring into position from the left such that the "B" is further away. |
Hands and torx 15 | 1:15 | 2 | |
| 2 | Slide retaining brushes into place ensuring that the flat spring fits into rear end of the brushes. | Hands | 0:15 | 1 | File:.JPG Retaining brushes replaced |
| 3 | Compress retaining brushes with a flat-head screwdriver and slide the armature inside. | Flat-head screwdriver | :20 | 1 | File:JPG Completed Motor Assembly |
| Gearbox Assembly Reassembly Steps | |||||
|---|---|---|---|---|---|
| Step | Description | Tool Required | Time Required | Difficulty (1-3) | Step Photograph |
| 1 | Slide pinion into the front bearing meshing it with the gear. | Hands | 0:15 | 1 | File:.JPG Pinion and front bearing reassembly |
| 2 | Slide rear bearing onto the rear of the pinion and gear prongs. | Hands | 0:15 | 1 | File:.JPG Completed gearbox assembly |
| Internal Assembly Reassembly Steps | |||||
|---|---|---|---|---|---|
| 1 | Slide the geared end of the motor assembly into the center of the rear bearing. | Hands | 0:15 | 1 | File:.JPG Combined motor assembly with gearbox assembly |
| 2 | Reconnect power wires into the rear of the reverse ring. Note: The black wire enters the reverse ring terminal marked with a "B" and the white wire enters the unmarked terminal. |
Hands | 0:15 | 1 | File:.JPG Completed internal assembly |
| Housing Reassembly Steps | |||||
|---|---|---|---|---|---|
| Step | Description | Tool Required | Time Required | Difficulty (1-3) | Step Photograph |
| 1 | Seat internal assembly into the groves of the drill housing. Note: Ensure that the serial numbers on the field are towards the top of the drill housing and that the retaining brushes on the armature are still on the copper track. |
Hands | 2:45 | 2 | File:.JPG Internal assembly seated inside of drill housing |
| 2 | Replace VS control unit. Note: The triangular shaped locking mechanism should slide freely into the hole on the drill housing. |
Hands | 0:15 | 1 | File:.JPG Completed internal assembly |
| 3 | Slide power cord into its location | Hands | 0:15 | 1 | File:.JPG Completed internal assembly |
| 4 | Secure power cord with cord clap and two screws | Hands and Trox 15 | 0:15 | 1 | File:.JPG Completed internal assembly |
| 5 | Slide cap and bit holder into place on the top of the drill | Hands | 0:45 | 1 | File:.JPG Completed internal assembly |
| 6 | Replace housing cover over and secure with screws | Hands and Trox 15 | 2:45 | 1 | File:.JPG Completed internal assembly |
