Architecture Chapter 12 Homework Engineering sketches may not display correct practices

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CHAPTER 12 SECTIONS,

REVOLUTIONS, AND

CONVENTIONAL BREAKS PROBLEMS

INSTRUCTIONS

The following problems give you a finished view with a proposed

cutting-plane line. Complete the cutting-plane line and the other

view by drawing the section that properly correlates with the

finished view and given cutting-plane line. A small pictorial view

is given to assist you in visualization. Do not draw the pictorial

view. Measure the given views and transfer the measurements to

your drawing. You can also make a print of the problem or prob-

lems page and sketch or draw the completed views on the copy.

Confirm the preferred method with your instructor.

To access CADD template files with predefined drafting

settings, go to the Student Companion Website, select

Student Downloads, Drafting Templates, and then select

the appropriate template file. Use the templates to create new

designs, as a resource for drawing and model content, or for

inspiration when developing your own templates. The ASME-

Inch and ASME-Metric drafting templates follow ASME, ISO,

and related mechanical drafting standards. Drawing templates

include standard sheet sizes and formats and a variety of

appropriate drawing settings and content. You can also use a

utility such as the AutoCAD DesignCenter to add content from

the drawing templates to your own drawings and templates.

Consult with your instructor to determine which template

drawing and drawing content to use.

DRAFTING TEMPLATES

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FULL SECTION ALIGNED SECTION

HALF SECTION OFFSET SECTION

2X Ø.50

.75

PROBLEM 12.2PROBLEM 12.1

PROBLEM 12.3 PROBLEM 12.4

Part 1: Problems 12.1 Through 12.4

Given objects with recommended multiviews having missing

lines or missing views, draw the multiviews using third-angle

projection. Each square on the given grid represents 1 in.

(25 mm). Use appropriate size ASME standard sheet size and

sheet blocks for each problem unless otherwise specified by

your instructor.

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Instructions

1. From the selected engineering sketch or layout, determine

the needed views and sections.

2. Make a sketch of the selected views and sections as close to

correct proportions as possible. Do not spend a lot of time

because the sketch is only a guide. Indicate cutting-plane

lines and dimension placement.

3. Using your sketch as a guide, draw the multiviews and sec-

tional views necessary to describe the part completely. Lay

out the drawing on an adequately sized ASME sheet with

border and sheet blocks. Select a scale that properly details

the part on the selected sheet size. Use unidirectional

dimensioning.

4. Include the following general notes at the lower left corner

of the sheet .5 in. each way from the corner border lines:

1. DIMENSIONS AND TOLERANCES PER ASME

Y14.5-2009.

2. REMOVE ALL BURRS AND SHARP EDGES.

3. UNSPECIFIED TOLERANCES:

Use the following for tolerances for unspecified inch values. A

tolerance block is recommended as described in Chapter 2, and

as shown in problems for Chapter 10, unless otherwise

specified.

For metric drawings, provide a general note that states: Tol-

erances for unspecified dimensions comply with ISO 2768-m.

Provide a general note that states surface finish 3.2 mm unless

otherwise specified.

1. The engineering layouts may not be dimensioned properly.

This is similar to what you can expect in industry. You can-

not assume that what the engineer gives you complies with

the drafting standards described throughout this textbook.

Verify the correct practice before placing dimensions. For

example, the diameter symbol should precede the diameter

dimension, and leaders should not cross over dimension

lines. Check other line and dimensioning techniques for

proper standards. Actual industry drawings are provided as

advanced problems throughout.

NOTE: Additional notes can be required, depend-

ing on the specifications of each individual

assignment.

Unspecified Tolerances

Decimals In.

X6.1

XX 6.01

XXX 6.005

ANGULAR 6309

FINISH 125 µin.

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Part 2: Problems 12.5 Through12.13

PROBLEM 12.5 Full section (in.)

Part Name: Fitting

Material: Bronze

Finish All Over: 63 min.

Refer to Chapter 10 Dimensioning and Tolerancing for proper di-

mensioning practices. Engineering sketches may not display cor-

rect practices. This problem can require a front view, a side view

showing the hexagon, and a full section to expose the interior

features for dimensioning.

PROBLEM 12.6 Full section and view enlargement (in.)

Part Name: Spring

Material: SAE 1060

Problem based on original art courtesy Stanley Hydraulic Tools,

Division of The Stanley Works.

Heat-treat:

1. Austenitize at 1475 8F. Inthis type of heat treatment, a steel

is held above a critical temperature long enough for trans-

formation to occur.

2. Direct quench in agitated oil.

3. Temper to RcC 44–46.

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PROBLEM 12.7 Full section (metric)

Part Name: Hydraulic Valve Cylinder

Material: Phosphor bronze

All Fillets and Rounds: R.1

PROBLEM 12.8 Full section (in.)

Part Name: Machine Plate

Material: 6160 T6 steel

PROBLEM 12.9 Full section (in.)

Part Name: Face Plate

Material: 6160 T6 steel

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PROBLEM 12.10 Full section, dimensioning cylindrical

shapes (in.)

Part Name: Plug

Material: Phosphor bronze

PROBLEM 12.11 Full section or half section (in.)

Part Name: Hub

Material: Cast iron

SPECIFIC INSTRUCTIONS: Convert the broken-out section in

the given drawing to a full section. Type of section used affects

view selection.

PROBLEM 12.12 Full and broken-out section (metric)

Part Name: Hydraulic Valve Cylinder

Material: Phosphor bronze

Proposed sections and section lines are not given in engineer’s

layout. Refer to “The Engineering Design Application” at the be-

ginning of Chapter 12.

PROBLEM 12.13 Full section (in.)

Part Name: Hanger

Material: SAE 1030

Fillets and rounds: R.062

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Part 3: Problem 12.14

PROBLEM 12.14

Advanced full section from engineer’s

sketch (metric)

Part Name: Bearing Housing

Material: SAE 1015

Courtesy Aerojet TechSystems Co.

NOTE: Use dimensioning symbols based on the ASME

Y14.5-2009 standards described in Chapter 10 Dimen-

sioning and Tolerancing. This problem drawing is

based on an outdated standard using abbrevia-

tions and words that should be converted to

symbols as shown in Chapter 10.

Note the following abbreviations:

CBORE—counterbore

SF—spotface

12 X

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Part 4: Problems 12.15 and12.16

PROBLEM 12.15 Half section (in.)

Part Name: Dial

Material: Bronze

PROBLEM 12.16 Half section (in.)

Part Name: Rod Support

Material: 6061–T6 aluminum

Fillets: R.03 unless otherwise specified.

Part 5: Problems 12.17 Through 12.19

PROBLEM 12.17 Half section and auxiliary view (metric)

Part Name: Nozzle Base

Material: Titanium, ASTM-B367 Grade C3

NOTE: Add the following note to the drawing using

all uppercase text: Clean casting by mechanical blast-

ing prior to alpha case removal. Chemically remove al-

pha case prior to inspection of castings using procedure

approved by procurement activity. Cast surfaces shall

be visually inspected and be free from cracks, tears,

laps, shrinkage, and porosity. Radiographically inspect

castings per MIL-STD-271 acceptance criteria for po-

rosity and inclusions per ASTM-E-446 and for cavity

shrinkage per ASTME- 192 (plates for .75 wall thick–

ness). Severity levels of casting defects shall be no

greater than tabulated here for the indicated

casting areas.

Provide adequate views to avoid crossing extension lines over

dimension lines.

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PROBLEM 12.18 Half section and broken-out section (in.)

Part Name: Bench Block

Material: AISI 1018

Case harden: .020 Deep 59-60 Rockwell C scale or AISI 41-40

Oil Quench 40-45 8C

Ream tolerance:1.000

.0000

PROBLEM 12.19 Half section (metric)

Part Name: Idler Pulley

Material: SAE 4310

Fillets and rounds: R3.2 mm

NOTE: Many diameter dimensions should be

placed on left- and right-side views.

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Part 6: Problems 12.21 Through 12.39

PROBLEM 12.21 Offset section (in.)

Part Name: Mounting Plate

Material: AISI 1020

Fillets: R.03 unless otherwise specified.

PROBLEM 12.22 Offset section (in.)

Part Name: Die Casting

Material: SAE 6150

SPECIFIC INSTRUCTIONS: Convert all dimensions to ASME

Y14.5 standards as shown and discussed in this textbook.

RECOMMENDED CUTTING PLANE

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PROBLEM 12.23 Offset section (in.)

Part Name: Drill Plate

Material: SAE 1020

Case harden: 55 Rockwell C scale

Fillets and rounds: R.12

FAO: 63 min.

PROPOSED CUTTING PLANE

PROBLEM 12.24 Aligned section (in.)

Part Name: Shaft Retainer

Material: SAE 4340

Fillets and rounds: R.06 unless otherwise specified.

59728_ch12_EOC_ptg01.indd 12 03/02/16 10:27 am

PROBLEM 12.25 Aligned section (in.)

Part Name: Hub

Material: SAE 3145

Fillets and rounds: R.125

PROBLEM 12.26 Broken-out section (in.)

Part Name: Taper Shaft

Material: SAE 4320

FAO: 16 min.

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PROBLEM 12.27 Auxiliary section (in.)

Part Name: Angle Bracket

Material: 6061-T6 aluminum

Fillets: R.13 unless otherwise specified.

Rounds: R.38 unless otherwise specified.

PROBLEM 12.28 Auxiliary section (metric)

Part Name: Gear Base

Material: SAE 2340

Finish All Over: 0.8 mm

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PROBLEM 12.29 Broken-out section, view enlargement (in.)

Part Name: Clamp Cap

Material: Cast aluminum

Fillets and rounds: R.06

PROBLEM 12.30 Broken-out section (metric)

Part Name: 50-mm 458 Elbow

Material: Cast iron

Fillets and rounds: R4mm

SPECIFIC INSTRUCTIONS: Consider bottom view or auxiliary

view for hole pattern dimensions.

PROBLEM 12.31 Revolved section (in.)

Part Name: End Loading Arm

Material: SAE 2310

Fillets and rounds: R.25

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PROBLEM 12.32 Revolved section (in.)

Part Name: Offset Handwheel

Material: Bronze

Fillets and rounds: R.12

Finishes: 125 min.

R1 3

Ø1

Ø8”

Ø 2.0 X 1 LG

1 – 20 UNEF – 2B

THRU

Ø X .25

1.250

1.252

PROBLEM 12.33 Broken-out, revolved section, view enlarge-

ment (in.)

Part Name: Pipe Wrench Handle

Material: SAE 5120

Fillets and Rounds: R.06

SPECIFIC INSTRUCTIONS: Engineering sketch is given in fractional

inches. Convert all size dimensions to two-place decimals and loca-

tion dimensions to three-place decimals for final drawing.

PROBLEM 12.34 Removed section (metric)

Part Name: Valve Stem

Material: Phosphor bronze

Finish All Over: 1 mm

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PROBLEM 12.35 Offset section (in.)

Part Name: Die Plate Casting

Material: SAE 3120

Fillets and rounds: R.25 unless otherwise specified.

RECOMMENDED CUTTING PLANE

1. 37 1. 1 3 1. 00

.25

.50

2.50

4X Ø .38

Ø .75

.08

OPPOSITE SIDE

2.00

4.38

.88

1.62

R .63

.50

4.63

.25

2 X R .62

ø 1.50

ø 2.25

R.25

1.00

ø .38

ø1.25

.25

1.88

PROBLEM 12.36 Broken-out section (in.)

Part Name: Slide Bar Connector

Material: SAE 4120

SPECIFIC INSTRUCTIONS: Convert chain dimensioning to

datum dimensioning.

PROBLEM 12.37 Broken-out section (in.)

Part Name: Drain Tube

Material: Ø 1.00 × .065

Problem based on original art courtesy TEMCO.

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PROBLEM 12.38 Conventional break (in.)

Part Name: Leg

Material: Ø2.00 Schedule 40 A120

Problem based on original art courtesy TEMCO.

PROBLEM 12.39 Offset section (in.)

Part Name: Cover

Material: Cast iron

.28

.69

1.50

1.75

2.75

3.00

3.50

2.50

.28

1.25

2.75

5.50

R1.25

.28

1.22

1.50

.75

1.00

.25

Ø.375

Ø.88

R1.00

Ø.500

R7.00 4X Ø.250

.28

1.00

.25

.75

.25

ALL FILLETS R.19

.25

R1.00

Part 7: Problems 12.40 Through12.51

PROBLEM 12.40 Revolved section, conventional revolution

(in.)

Part Name: Crank Arm

Material: Cast steel 80,000

Fillets and rounds: R.12

CENTERLINE

OF ARM

Ø .313

THRU

Ø1.38

Ø.88

CENTERLINE

OF ARM

CENTERLINE

OF ARM

TYPICAL ARM SECTION

.38 THICK AT HUB

.25 THICK

AT END

R.12

R1.32

Ø.75

.32

.44

.32

.25

.25 1508

1.00

1.63

3.25

3.63

3.50

R1.32

.878

.876

.440

.437

Ø THRU

.505

Ø.495

THRU

1658

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PROBLEM 12.41 You select the sectioning technique (in.)

Part Name: Base Support

Material: Mild steel

PROBLEM 12.42 You select the sectioning technique (in.)

Part Name: Mounting Base

Material: Cast aluminum

59728_ch12_EOC_ptg01.indd 19 03/02/16 10:27 am

PROBLEM 12.43 Full section from actual industry

drawing (in.)

Part Name: Bolt Guard

Material: Aluminum

Courtesy Stanley Hydraulic Tools, a Division of the Stanley Works.

2.960

2.900

1.830

1.770

2.380

2.320

1.430

1.370

28 DRAFT

SECTION A-A

.090

.030

1.000

.940

.280

.220

1. 17 0

1. 110

.270

.210

.330

.270

.780

.720

1.020

.980

.490

.430 .170

.110

158

458

458 X

R1.780

1.720

.780

.720

1.060

1.000

1.060

1.000

2.780

2.720

148

PROBLEM 12.44 Advanced full section and partial auxi liary

section from actual industry drawing (in.)

Part Name: Accumulator Plug

Material: Phosphor bronze

Courtesy Stanley Hydraulic Tools, a Division of the Stanley Works.

5 –14UN–2A

PITCH DIA.

16 DRILL THRU

4–16UNF–2B TO DEPTH SHOWN

FOR (–B) SAE O-RING PORT

5.330

5.325

2.440

2.420

.095

.099

4.996

4.992

5.498

5.488

2.062

1.994

1.240

1.260

.840

.860

.530

.555

1.250 FULL THD

STEEL STAMP PART NO

IN THIS AREA IN 3/32

CHARACTERS

4.502

4.498

Ø1.875

Ø2.630

.750

.760 REF

.480

R .250

R .016

MAX

.270

17°

30°

.050

.070

45° X

45° X .080

2 PLACES

5.452

5.446

Ø4.125

R.310

R.125

SECTION A–A

SECTION B–B

HEX

NOTE: Use dimensioning symbols based on the ASME

Y14.5-2009 standards described in Chapter 10 Dimen-

sioning and Tolerancing. This problem drawing is

based on an outdated standard using abbrevia-

tions and words that should be converted to

symbols as shown in Chapter 10.

59728_ch12_EOC_ptg01.indd 20 03/02/16 10:28 am

PROBLEM 12.45 Advanced full section and view enlarge-

ment from actual industry drawing (in.)

Part Name: Swivel

Material: SAE 5150

Courtesy Stanley Hydraulic Tools, a Division of the Stanley Works.

2.005

1.995

1.885

1.865

2.250

.450

Ø 2.300

1.720

1.250

.500

R.100 DETAIL B

SCALE: 10 X

SECTION A-A

(1.210)

Ø 1.780

(Ø 2.750)

458 X .020

SEE DETAIL B

BREAK CORNERS R BOTH ENDS

BREAK CORNER

APPROX. R.005

1.375 SPHERICAL

RADIUS

2 X Ø

1. 74 0

1.738

.006

.003

.176

.171

.015

.005

(Ø 1.565)

1.240

1.222

1.566

1.564

1.200

.095

.085

2 X 5

16 –12UN–2B LH,

.750 FULL THD

FOR–16 (1″) SAE O-

RING PORT

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