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| = Executive Summary = | | = Executive Summary = |
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Revision as of 01:23, 16 September 2008
Executive Summary
Customer Needs and Stakeholders
Product Function/Evaluation
Assembly
Part Number | Name | Qty. | Weight | Function | Material | Maunfacturing Process | Image |
|
S1
| Wooden handle
| 2
| 33.1 oz
| Allows user to operate tool
| Wood (Pine)
| Automated CNC turning
|
|
S2
| Carriage Bolt
| 4
| 0.7 oz
| Attaches wooden handle to digging head
| Steel
| Upset forging
|
|
S3
| Large washer
| 4
| 0.1 oz
| Prevents carriage bolt head from being embedded in wooden handle
| Steel
| Stamping
|
|
S4
| Digging head
| 2
| 22.5 oz
| Provides means of digging into dirt, sizing the hole, and removing dirt
| Steel
| Stamping
|
|
S5
| Pivot bolt
| 1
| 0.8 oz
| Joins two handle/digging head assemblies
| Steel
| Upset forging
|
|
S6
| Sleeve
| 1
| 0.2 oz
| Protects pivot pin
| Steel
| Roll forming
|
|
S7
| M8 washer
| 5
| 0.05 oz
| Increases surface area over which compressive force of the tightened bolt and nut is applied, placed between nut and and surface to prevent damage to surface when nut is tightened
| Steel
| Stamping
|
|
S8
| M8 x 1.25 Lock nut with nylon insert
| 5
| 0.1 oz
| Threads onto bolt and tightened to join parts together. Nylon insert prevents nut from loosening
| Steel
| Forging
|
|
Part Number | Name | Qty. | Weight | Function | Material | Maunfacturing Process | Image |
|
C1
| Grip
| 2
| 2.2 oz
| Provides comfortable surface for gripping the tool, protects end of fiberglass handle
| Plastic
| Extrusion
|
|
C2
| End cap
| 2
| 0.05 oz
| Stiffens open end of fiberglass handle, provides surafce area for grip to attach over end of otherwise hollow handle
| Plastic
| Injection molding
|
|
C3
| Fiberglass handle
| 2
| --
| Allows user to operate tool
| Fiberglass with protective coating
| ?
|
|
C4
| Wooden handle insert
| 2
| --
| Reinforces fiberglass handle where handle attaches to connecting arm
| Wood
| Automated CNC turning
|
|
C5
| Connecting arm
| 2
| -- oz
| Extends length of handle to digging head, bent to particular shape to allow for compund lever action for opening and closing digger heads
| Steel
| Roll forming, swaging, and bending
|
|
C6
| Spacing bracket
| 1
| 1.9 oz
| Maintains spacing of handles when the tool is in the closed position
| Steel
| Stamping
|
|
C7
| Handle bolt
| 4
| 0.7 oz
| Attaches Fiberglass handle to Connecting arm
| Steel
| Upset forging
|
|
C8
| Handle washer
| 6
| 0.2 oz
| Increases surface area over which compressive force of Handle bolt is applied, protects Fiberglass handle from damage that would caused by tightening/rotating nut or bolt
| Steel
| Stamping
|
|
C9
| M8 x 1.25 Lock nut with nylon insert
| 7
| 0.1 oz
| Threads onto bolt and tightened to join parts together. Nylon insert prevents nut from loosening
| Steel
| Forging
|
|
C10
| M8 washer
| 3
| 0.05 oz
| Increases surface area over which compressive force of the tightened bolt and nut is applied, placed between nut and surface and bolt head and surface to prevent damage to surface when nut is tightened
| Steel
| Stamping
|
|
C11
| Bushing
| 1
| 0.7 oz
| Used to align two Connecting arms and create a low friction surface for Connecting arms to pivot about
| Brass
| Roll forming
|
|
C12
| Plastic spacer
| 1
| 0.05 oz
| Placed concentric with Bushing between two conecting arms to provide low friction surface and prevent the arms from wearing against one another
| Plastic
| Injection molding
|
|
C12
| Scissor pin bolt
| 1
| 0.3 oz
| Joins two handle assemblies together, passes though Bushing to create main joint around which handles pivot
| Steel
| Upset forging
|
|
DFMA
FMEA
DFE
Mechanical Analysis