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Chapter 10 Conventional Practice in Section View. Section view representation of rib , web , spoke and lug . Aligned section. Conventional break. TOPICS. Section view representation of rib , web , spoke and lug. Rib. Rib. Web. TERMINOLOGY.

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Chapter 10 Conventional Practice in Section View


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Presentation Transcript
slide1

Chapter 10

Conventional Practice

in Section View

slide2

Section view representation

of rib, web, spoke and lug.

Aligned section

Conventional break

TOPICS

slide3

Section view representation of

rib, web, spoke and lug

terminology

Rib

Rib

Web

TERMINOLOGY

Riband Web are thin, flat feature of an object that acts as a structural support.

slide5

Hub

Hub

Rim

Spoke

Spoke

Rim

TERMINOLOGY

Spoke is the rod radiating from the hub to the rim of a wheel.

slide6

TERMINOLOGY

Lug is an ear which is built as portion of an object for attachment.

slide7

TERMINOLOGY

Lug is an ear which is built as portion of an object for attachment.

slide8

CONVENTIONAL PRACTICE

Omitthe section lines on the section view of

  • Rib, Web and Lug, if the cutting plane is passed flatwise through.
  • Spoke, if the cutting plane is passed longwise through.
slide9

EXAMPLE : RIB

Normal multiview drawing

Normal section view

Section view drawing with convention

slide10

EXAMPLE : WEB : flatwise cut

Normal multiview drawing

Normal section view

Section view drawing with convention

slide13

EXAMPLE : SPOKE

Misleading impression

slide16

DEFINITION

Aligned section is a section view that is drawn

by imaginary rotating the object’s features

appeared in a principal view about symmetry

axis

slide21

Example : Spoke & Keyway

Example : Aligned section of keyway

slide24

For long objects that have to draw in a small scale to fit them on the paper, it is recommended to remove its long portion (which contains no important information) and draw the break lines at the broken ends.

CONVENTIONAL PRACTICE

slide25

Example

SCALE 1:1

slide26

Example

SCALE 2:1

slide27

STANDARD BREAK LINES

Wood

Rectangular

cross section

Metal

Cylindrical

cross section

Tubular

cross section

slide28

30o

R

30o

R/3

R/3

TO DRAW CYLINDRICAL BREAK

slide29

f16

800

f16

800

TO DIMENSION A BROKEN PART

Typical

dimensioning

method

not to scale dimensions