your assignment is to create a set of drawings for a desktop basketbal
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Question
Your assignment is to create a set of drawings for a desktop basketball game. You've been given the
parts descriptions and a rough sketch of the desktop basketball game. This version of the game will
be offered at a higher-end price point, so the basic construction will use brass and a walnut wood
laminate for the shooting arm.
A desktop basketball game is shown here. Use this sketch as a reference when you're drawing your
formal plans for this project.
A desktop basketball game is shown here. Use this sketch as a reference when you're drawing your
formal plans for this project.
Tabletop Basketball Parts Descriptions
Court/Base:
3/40" thick
4.500 wide
10.000 long
Chamfer 45° all around.
Break bottom edge all around.
Drill and tap blind hole to mate with threaded end of the backboard post.
Drill 2 sets of 10 evenly spaced holes for scoring pins. Pins should fit snugly but be easily
extracted.
Counterbore in two places an appropriate through hole for socket head cap screws to mount shot-
arm mounting block.
Backboard post:
7/16" diameter brass rod (length TBD based on thread length)
Each end for mounting to court/base and to backboard.
8.00" from court surface to bottom of backboard.
Refer to BoltDepot.com for drawing the exact dimension of thread at the end of the brass rod.
Backboard:
Maximum dimensions 3/4" thick, 4.12" W × 5.75" L
Top curve 2.87" diameter radius, 4.50″ flat at bottom, arc to meet top curve
Drill and tap center line on bottom to accept threaded portion of backboard post.
Counterbore and drill through holes for two socket head cap screws to mount rim to backboard.
Note: 2" wide x 1.625 (inside dimensions) milled rectangle on backboard surface above rim.
Rim:
1/2" thick
2.50 × 2.50 maximum dimensions
1.25" diameter through hole center line 1.25" from back edge (mounting surface for backboard)
1.25" radius for front curve of rim.
Outside edge of rim is fully rounded.
Inside edge of through hole is fully rounded.
Drill and tap two holes for socket head cap screws to mount rim to backboard.
Shot arm mounting block:
7/16" thick, tapered to 3/8" thick
2.12" long
1.00" wide
Drill and tap bottom for two socket head cap screws to mount to court/base.
Drill, tap, and countersink one hole on top for mounting shot arm. Score pins:
5/16" diameter rod
| Top of pin 5/16″, plus pin length 3/8″ long
Turned to approximately 3/16" diameter (specify diameter of pin to match drilled scoring holes in
court/base)
Shot arm:
1/16" thick wood laminate
1.62" wide, 6.12" long, tapered 0.87 at end that connects to mounting block
1.62" wide at ball/shot end
7/8" diameter through hole
13/16" radius curved end (ball end)
0.87" radius curved end at mounting end
Drill through hole and countersink for pan head machine screw to mount arm to base.
Bottom diameter of mount screw = 0.12 inch
Top diameter of mount screw = 0.07 inch
Diameter of screw thread = 0.03
Give a fillet of 0.12" to the edges of the backboard and base mount.
Notes:
All parts are brass, unless otherwise noted.
All dimensions are in inches.
The student is responsible for determining and specifying mounting hardware, thread size, and
length for backboard post.
Sketches provide basic dimensions as a guideline; the student may need to determine other
dimensions from the information given. The student is responsible for accurate dimensions and
appropriate tolerances. Do not base position of dimensions or tolerances on the sketches; they're for
reference only.
Procedure
Based on the sketches and specifications provided, create a full working package of drawings that
would be suitable for the manufacture of the project specifications. The basic dimensions and
construction specifications are provided, but you'll have to determine the needed dimensions from
the information provided. You'll also need to complete some of the design work related to thread
sizes and assembly hardware. You must create a section view for the backboard and rim assembly
that shows the detail of the rim shape and the assembly details connecting the rim to the backboard.
To receive full credit for the assignment, your drawings must be prepared and formatted as follows:
All drawings must be created in AutoCAD and submitted as files in the .dwg format. Do not submit
scans of mechanical drawings, and do not mail mechanical drawings to the school.
All drawings must have a border and an appropriate title block. The title block data must be
complete.
The assembly drawing and bill of material should be 11″ × 17″.
The pictorial drawing should be 11" x 17".
The individual detailed drawings for each part and the standard parts sheet should be 8½″ × 11".
The drawings should follow the dimensioning, tolerancing, and basic drafting rules described in
your textbook.
Notes and other specifications should be checked for correct spelling and dimensional accuracy. All drawing components, line types, and so on must be on appropriate AutoCAD layers as identified
in your textbook readings.
The drawing assembly should be as follows:
isometric pictorial
assembly drawing
detailed drawings (in order per the assembly drawing)
standard parts sheet (if required)