SkillsUSA2013 Contest Projects

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Technical Drafting

2013 TECHNICAL DRAFTING PROJECT The following is excerpted from the Contest Descriptions on the SkillsUSA website: “This contest evaluates contestant's preparation for employment and recognizes outstanding students for excellence and professionalism in the field of technical drafting. The contest will focus on the solution of industry-developed problems by applying appropriate technical drafting skills and tools including computer-aided drafting (CAD).” The project this year is a Battle Top toy shown on this page. The Top Housing is shown clear yellow to provide an internal view. The mechanism is an extremely effective method for applying spin to a top. When two or more tops (it is sold with three tops) bump into each other while spinning they separate very quickly with sometimes unpredictable results. The Top Assembly is attached to the Trigger and then turned which builds potential energy in the Trigger Spring via a ratchet connection. When the Trigger is depressed, the Top is ejected which releases the stored spring energy. Project prepared by: Patrick McCuistion Ohio University

BATTLE TOPS The first three drawings in this package show the parts of the Top. The remaining parts are shown after the Top Assembly page. The instructions are to draw the following:

.3616°

.13

O.34

R.06

.80

O.03

3D geometry for all the parts, fully dimensioned detail drawings of the parts listed in the parts lists except the screw and springs, the TOP assembly drawing including item balloons and parts lists and FINAL assembly drawing including item balloons and parts lists.

The detail and assembly drawings must be on proper drawing formats and include completed title blocks. Except for the Screws and Springs, all the parts are injected using high impact polystyrene. SELF-TAPPING SCREW - #3(.099) – 28 X .25, Type B, Type 1A Cross Recessed Pan Head, .0005 thick chrome plate TRIGGER SPRING DIMENSIONS Material - UNS G10450 Wire diameter - .02 Outside diameter - .26 Free length - .62 Installed length - .50 No. of coils - 7 End treatment - Closed

TENSION SPRING DIMENSIONS Material - UNS G10450 Wire diameter - .03 Inside diameter - .34 Free length - .80 No. of coils - 11 End treatment - See views below

HOUSING

A

A

SECTION A-A

.16.25.30

.03

60°3X

60°3X

R.653X

R.086X

R.066X

O1.132X

O.66r .003

D

h .003W 0 D

R

l O.005M D R

NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – SURFACE FINISH SPI A-1 4 – UOS ALL DIM BASIC 5 – UOS ALL SURF

h .005 D R

CONE

A

A

SECTION A-A

.20

.38

15°24X

R.06 24X

O.97

.4524X

O.12

O.142X

.362X

O1.13

S

r .001

K

l O.005M S K

l O.01M S K

S .003 S K

.26

SEPT REQ

NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – SURFACE FINISH SPI A-1 4 – UOS ALL DIM BASIC 5 – UOS ALL SURF

h .003 S K

RATCHET

A

A

SECTION A-A

SO .12

30°2X

120°2X

.10

.053X

R.474X

R.066X

.10

120°2X

R.063X

R.043X

97°3X

R.06

O.30

O.23

.10.04

.09.21

.052X

R.383X

R.313X 30°3X

.073X.054X

.463X

R.033X

31°2X

B

.102X

A

R.026X

.08

r .003

M

77°3X

NOTES: 1 – ALL WALL THK .04 2 – ALL DRAFT 2° MAX 3 – SURFACE FINISH SPI D-3 4 – UOS ALL DIM BASIC 5 – UOS ALL SURF

h .005 M B A

TOP ASSEMBLY

3 0902XX004 RATCHET 1

2 0902XX002 CONE 1

1 0902XX003 HOUSING 1

ITEM NUMBER TITLE QTY

PARTS LIST

1

3

2

The assembly is held together with adhesive between the outside Diameter of the Cone (2) and the inside diameter of the Housing (1). The Ratchet (3) is contained between Housing (1) and Cone (2).

SPIN PIN

AA

SECTION A-A

.04.06

.09

.232X

.092X

.11

.10

T

.13

.401.05

.06

.05

O.25.24

O.07.06

r .003

.27 O.50.49

A

P

l O.005M M P

l O.01M P A T

M

l .01M M

NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – SURFACE FINISH SPI D-3 4 – UOS ALL DIM BASIC 5 – UOS ALL SURF

h .003 P A T

TRIGGER (Notes on next page)

A

A

SECTION A-A

B

DETAIL B4:1

C

DETAIL C4:1

O .52 O .37 O .43

R.34

.95

.05

1.135

.42 .05

R .356X

O .6260°6X

.06.20

.034X

.79O

22.0°6X

.60

.32.49

r .002

A

.38

.28 .21

n O .01 M A

B

C

.85

.90

O .30

h .002W 0 A B C

R.42

OUTSIDE

INSIDE

.65

.076X

.256X

68°

BOTTOM HOUSING

A

A

SECTION A-A

B

DETAIL B3:1

.0254X.45

O .102.1003X

O .195 +.002- .0003X

.50

1.15

.452X

R 8.9752X

.252X

.42.05

1.135

R 1.975

R .42

A

h .003 W .001 A

B

l O 0 M A B

l O 0 M A B

h .002 W 0 A B

O .1953Xl O .005 M A B

SEP REQT

SEP REQT

OUTSIDE

r .003

R 2.00

R .562X

R .543X

R 9.002X

1.60

INSIDE

R

.07.053X

TRIGGER NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – UOS ALL ROUNDS .04 4 –OUTSIDE SURFACE FINISH SPI A-1 5 – SURFACE FINISH SPI D-3 6 – UOS ALL DIM BASIC 7 – UOS ALL SURF

BOTTOM HOUSING NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – UOS ALL ROUNDS .04 4 –OUTSIDE SURFACE FINISH SPI A-1 5 – SURFACE FINISH SPI D-3 6 – UOS ALL DIM BASIC 7 – UOS ALL SURF

h .005 A Bh .005 A B C

TOP HOUSING

A

ASECTION A-A

R.30

R 4.00

R.563X

.30.025

SR .05

.07

.07

.38

.50

1.15

.90

1.60

R .5353X

R9.002X R8.9752X

O .083X

O .30

h .003

R4.05

O .203X

O .30

.69

.09

l O 0M A B

h .003 W .001 A

B

l O .005 M A B

l O 0M A B

l O .005 M A B

C

l O .01 M A C

.452X .252X

R .02

BB

SECTION B-B

.69

R3.00

C

C

SECTION C-C

R3.05

A

4X

1.18

.50

R2.00

R1.975

INSIDE

OUTSIDE

R

NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – TEXT RAISED .02

4 –OUTSIDE SURFACE FINISH SPI A-1 5 – SURFACE FINISH SPI D-3 6 – UOS ALL DIM BASIC

7 – UOS ALL SURF h .005 A B

FINAL ASSEMBLY

8 0902XX010 TOP 1

7 FSCST2X28 SCREW, SELF TAP 3

6 0902X1007 HOUSING, TOP 1

5 0902XX008 SPRING, TENSION 1

4 0902XX001 PIN, SPIN 1

3 0902XX006 SPRING, TRIGGER 1

2 0902XX005 TRIGGER 1

1 0902X2007 HOUSING, BOTTOM 1

ITEM NUMBER NAME QTY

PARTS LIST

6

5

4

3

2

1

7

8

SECTION A-A