Architecture Chapter 15 Homework The checker coordinates and consults with the engineer and instructor

41

PROBLEM 15.21

(Continued)

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42

PROBLEM 15.21

(Continued)

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43

PROBLEM 15.22 Working drawing (in.)

Assembly Name: Table Vise

SPECIFIC INSTRUCTIONS: Prepare a complete set of working

drawings with one detail drawing per sheet and the assembly

and parts list on another sheet. When preparing the assembly

PARTS LIST

KEY QTY DESCRIPTION

1 2 CLAMP JAWS

3 1 PIVOT

6 1 TABLE

7 1 BASE

8 1 LOCKING HANDLE

9 1 1/4-28UNF NYLOCK NUT

10 2 3/8 FLAT WASHER

11 2 ADJUSTING ROD

13 2

ADJUSTING HANDLE KNOB

12 2 ADJUSTING ROD HANDLE

21

1/4 -28UNF X 2″ LG

HEX HD MACH. SCREW

4 2 SCREW ADJUSTER

52

1/4-28UNF X 1″ LG

STANDARD SLOT FLAT

COUNTERSUNK HD

CAP SCREW

14 2

8-32UNC X 5/8″ LG

SLOTTED ROUND HD.

MACHINE SCREW

15 2 1/8 SPRING PIN

1/4-28UNF X 1″ LG

STANDARD SLOT PAN

HEAD MACHINE SCREW

216

drawing, use separate balloons for each part in each view or use

only one balloon in the view that most clearly identifies the part.

This is an engineering prototype project. Errors are likely in this

problem. Verify dimensions during assembly. Establish toler-

ances between mating parts.

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44

PROBLEM 15.22

(Continued)

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45

PROBLEM 15.22

(Continued)

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46

PROBLEM 15.22

(Continued)

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47

ADVANCED TEAM DESIGN PROBLEMS

Part 2: Problems 15.23 and 15.24

These problems are suited to a team approach. It is recom-

mended that different parts of the project be assigned to each

team member. Team members must coordinate mating parts

during the development of the working drawings. This is an en-

gineering prototype project. Errors are likely. Verify dimensions

during assembly. Establish tolerances between mating parts. If

errors are encountered, the team members should meet to re-

solve conflicts and establish alternatives.

Prepare a complete set of working drawings with one detail

drawing per sheet, and the subassembly, assembly, and parts lists

on separate sheets. When preparing the subassembly and assembly

drawings, use separate balloons for each part in each view or use

only one balloon in the view that most clearly identifies the part.

TEAM PROBLEMS

The following advanced problems can be assigned as team prob-

lems as determined by the instructor and course objectives.

Team problems are provided that can be used as projects

that help foster leadership and cooperation between team mem-

bers to design and draw complete sets of working drawings for a

product. Teams are established with any desired number of

members based on the project and curriculum goals. Teams can

select an engineer by voting in a democratic process, by select-

ing the person with the highest course evaluation, or as deter–

mined by the instructor. Anengineercreates designs and is the

person in charge of the project. The engineer coordinates the

team work, monitors the progress, and provides answers and

instructions to the team members in cooperation with the in-

structor. The engineerdivides the project into tasks and assigns

portions of the project to the drafting team members. The engi-

neer works with team members to establish design alternatives.

Team members are drafters, with one drafter responsible for

sheet layout and reproduction. Each drafter is assigned specific

drawing for the completion of the entire set of drawings. The

engineer provides coordination between team members to con-

firm all parts of the project match. Final team assignments and

members are determined by your instructor. A checker is se-

lected using criteria similar to choosing the engineer. The

checker works with drafting team members to advice on the

proper use of standards. The checker evaluates each completed

drawing to make sure drafting standards are properly applied.

The checker can redline a print with requested corrections that

are returned to drafting for final completion. The checker coor–

dinates and consults with the engineer and instructor to make

sure drawings are completed in accordance with design require-

ments and industry standards.

Team evaluation criteria:

Team project evaluation includes:

Project coordination: organization of project assignments.

Project completion: complete set of working drawings

finished.

Team member cooperation.

Project quality: drawings completed accurately and in a pro-

fessional manner.

Engineering decisions:

Project properly interpreted.

Design decisions properly evaluated and completed.

59728_ch15_EOC_ptg01.indd 47 2/3/16 2:24 PM

48

PROBLEM 15.23 Working drawing (in.)

Assembly Name: Motor

Courtesy Timothy Y. Taylor and Matthew Bell.

SPECIFIC INSTRUCTIONS: This problem is advanced, and con-

tains challenging applications that include gears, bearings, and

seals. You should study gears and related drafting practices cov-

ered in Chapter 16 before completing this problem.

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49

PROBLEM 15.23

(Continued)

REQD

1

4

1

QTY

NOMENCLATURE

OR DESCRIPTION OF MAIN ASSEMBLYIDENTIFYING NO.

PART ORITEM

NO.

O.S. MAX GAS MOTOR

BEVELED SLEEVE

WASHER

CLUTCH PIN

CLUTCH HOUSING

BRAKE PAD

CLUTCH SLEEVE

CLUTCH GEAR

CLUTCH BEARING

CLUTCH SLEEVE

HORSESHOE CLIP

REFER TO FOLLOWING PAGES

I.D. Ø.025 ⫻ .O.D. Ø.042 ⫻ .015THK

Ø.075 ⫻ .375

REFER TO FOLLOWING PAGES

ESTABLISH PURCHASE PART

RUBBER SEAL

FUEL INTAKE ADJUSTER PIN

FUEL ADJUSTER

FUEL INTAKE

HEX NUT

CARBURETOR HOUSING

GAS REGULATOR

MIXTURE CONTROL

AIR ADJUSTER

HEX CAP

REFER TO FOLLOWING PAGES

1/4-16UNC-2

REFER TO FOLLOWING PAGES

ESTABLISH PURCHASE PART

REFER TO FOLLOWING PAGES

PISTON SHAFT

GLOW PLUG

WASHER

HEX SCREW

HEAT SINK

PISTON

PISTON PIN

CRANK ARM

REFER TO FOLLOWING PAGES

ESTABLISH PURCHASE PART

REFER TO FOLLOWING PAGESMAIN HOUSING

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

SCREW LOCK

CAP SCREW

STARTER HOUSING

FACE PLATE

SLEEVE

WASHER

PULLEY SHAFT

CRANKSHAFT

REFER TO FOLLOWING PAGES

3-48UNC-2 ⫻ .250″

I.D.Ø.316 O.D.Ø.475 ⫻ .015THK

REFER TO FOLLOWING PAGES

DESIGN OR FIND ALTERNATE PURCHASE

1

2

1

2

1

2

1

REFER TO FOLLOWING PAGES

3-48UNC-2 ⫻ .375″

WASHER

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50

PROBLEM 15.23

(Continued)

OR DESCRIPTION OF CLUTCH ASSEMBLY

IDENTIFYING NO.

PART OR

CLUTCH ASSEMBLY

NOMENCLATUREITEM

NO.

QTY

REQD

11

12

14

15

16

17

18

13

HORSESHOE CLIP

CLUTCH SLEEVE

CLUTCH BEARING

CLUTCH GEAR

CLUTCH SLEEVE

BRAKE PAD

CLUTCH HOUSING

CLUTCH PIN

1

2

1

2

1

2

REFER TO FOLLOWING PAGES

ESTABLISH PURCHASE PART

REFER TO FOLLOWING PAGES

Ø.075 ⫻ .375

REFER TO FOLLOWING PAGES

BEVELED SLEEVE

WASHER

19

20

REFER TO FOLLOWING PAGES

I.D. Ø.025 ⫻ O.D. Ø.042 ⫻ .015THK

1

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51

PROBLEM 15.23

(Continued)

REQD

QTY

1

PART OR

IDENTIFYING NO.

ITEM

NO.

NOMENCLATURE

OR DESCRIPTION OF CARBURETOR SUBASSEMBLY

RUBBER SEAL

FUEL INTAKE ADJUSTER PIN

FUEL ADJUSTER

FUEL INTAKE

HEX NUT

CARBURETOR HOUSING

GAS REGULATOR

MIXTURE CONTROL

WASHER

AIR ADJUSTER

HEX CAP

30

29

28

27

26

25

24

20

22

23

21

REFER TO FOLLOWING PAGES

ESTABLISH PURCHASE PART

REFER TO FOLLOWING PAGES

1/4-16UNC-2

REFER TO FOLLOWING PAGES

CARBURETOR SUBASSEMBLY

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52

PROBLEM 15.23

(Continued)

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53

PROBLEM 15.23

(Continued)

2CRANKSHAFT

MATL: SAE 1020

3PULLEY SHAFT

MATL: SAE 1020

5SLEEVE

MATL: PHOSPHOR–BRONZE

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54

PROBLEM 15.23

(Continued)

6FACE PLATE

MATL: SAE 1020

7STARTER HOUSING

9SCREW LOCK

MATL: SAE 2330

10

HORSESHOE CLIP

MATL: ACETAL THERMOPLASTIC

11

CLUTCH SLEEVE

MATL: SAE 1020

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55

PROBLEM 15.23

(Continued)

SPUR GEAR DATA

BASE CIRCLE DIAMETER

CIRCULAR PITCH

ROOT DIAMETER

CIRCULAR THICKNESS

NUMBER OF TEETH

PRESSURE ANGLE

DIAMETRAL PITCH

.583

.5344

.108

.054

18

20º

29

13

CLUTCH GEAR

MATL: SAE 1020

14

CLUTCH SLEEVE

MATL: SAE 1060

15

BRAKE PAD

MATL: ACETAL THERMOPLASTIC

12

CLUTCH BEARING

MATL: BRONZE

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56

PROBLEM 15.23

(Continued)

16

CLUTCH HOUSING

MATL.– SAE 1020

18

BEVELED SLEEVE

MATL: PHOSPHOR–BRONZE

20 HEX CAP

MATL: SAE 1020

22 WASHER

MATL: PLASTIC

21 AIR ADJUSTER

MATL: SAE 1020

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57

PROBLEM 15.23

(Continued)

23 MIXTURE CONTROL

MATL: SAE 1020

24 GAS REGULATOR

MATL: SAE 1020

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58

PROBLEM 15.23

(Continued)

25 CARBURETOR HOUSING

MATL: SAE 1020

27 FUEL INTAKE

MATL: ACETAL THERMOPLASTIC

28 FUEL ADJUSTER

MATL: BRONZE

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59

PROBLEM 15.23

(Continued)

29 FUEL INTAKE ADJUSTER PIN

MATL: SAE 1040

31 PISTON SHAFT

MATL: SAE 1020

32 CRANK ARM

MATL: SAE 1020

33 PISTON PIN

MATL: SAE 1020

34 PISTON

MATL: ALUMINUM

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60

PROBLEM 15.23

(Continued)

35 HEAT SINK

MATL: ALUMINUM

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