Section 10: Basic and common symbols recognition

Section 10: Basic and common symbols recognition PURPOSE This section aims to enable the student to extend their knowledge of Drawing Interpretation from Engineering Drawings produced to AS1100 standard.

Objectives At the end of this section you should be able to:

o

Interpret information on detail drawings of engineering components.

Completion guidance Students should attempt this section if the material relates to the engineering discipline they are employed or intend to be employed in.

MEC076 Engineering Drawing Interpretation 1 Resource Package December, 1998

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iI 'II

131

I

MEC076 - 10 - 1

I

Basic and Common Symbols. Recognition. The symbols covered in on the following pages are an example of the widespread use of symbols and abbreviations in industry. The symbols and abbreviations covered in this module relate to a few trades and professions. In some areas there are so many symbols and abbreviations that only someone who is heavily involved would know them all. If you do not know what a symbol means, do not guess, because in some industries it could lead to a serious injury or death if a wrong interpretation or decision is made. If you do not know what a symbol means, make sure you ask someone who definitely knows, not someone who does not like to admit that they do not know. You do not want the guess of someone else, you want someone who definitely knows or someone who has the latest publication containing the symbols.

1126.50

I

Feature identification A

Datum identification R8

Radius

135

R

R12

Equal .015

Diameter

D

~

First angle projection

.08

Square

1:-·;·-:1

~D65

Third angle

-C-----}

projection

-8:-1:4

Taper

t::::". 1: 3.5 Slope


ti " iii 'II 132

[ MEC076 - 10 - 2

I

Adding the roughness value to a standard symbol

Surface textures Surface texture

II

Surface texture refers to the roughness of a surface. It can vary from very rough to very smooth, for example an aluminium casting may have the following surface textures: II rough cast II fine cast II die cast II rough machined II medium machined II fine machined

. ..

If a particular surface finish is required, but the production technique is not important, this symbol should be used:

\y

If a particular surface finish is required by using a machining operation, this symbol would be used:

7'

When a surface finish is needed on a surface where no material can be removed, this symbol would be used:

~ V

Standard symbols

V

Basic symbol: used when surface finish can be produced by any convenient technique.

~

Modified symbol: finish done by a machining process.

\!

Modified symbol: indicating a surface finish without removal of material (for example, quality of an initial casting).

Roughness value chart -:>'"3:_ >,:;<

'

A""",",L

\'//'

50

Rough oxy cut

25

Rough casting

12.5

Rough machining

6.3

Course machining

3.2

Average machining

1.6

Good machining

0.8

Fine machining

0.4

Fine grinding

0.2

Honing

0.1

Buffing

0.05

Polishing

0.025

Super polishing

These numbers will become more relevant when the user is more conversant with the finishes they represent. Ask your teacher to supply samples of various finishes to a certain roughness value. MEC076 Engineering Drawing Interpretation 1 Resource Package December, 1998

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133

[ MEC076 - 10 - 3 [

Variations to standard symbols

4

3

2 DO NOT SCALE

3.2

g:!/

~~/

V

These symbols show maximum and minimum roughness values.

V

A

A _-t----+~M"-1'-"2 " 1.75

o

May be added to a drawing in a note form or inserted into the title block. This one is used when all the surfaces are to be machined to the same surface texture.

# 8

B

51.... 1ED

~

0

----""'-l-----lfl-I-

Jj _

-+~-- _W I _

,-,--+-r--- - - -

B

M20 x 2.5

c

c

Y///////l~

Indicates that an allowance of 3mm is to be provided for final machining.

R15

o

Location of symbols on a drawing

7

I

,,"

~ L..lL.i...1!"_ _ _ _-J._____ ,--------- -----;

ID

I .016

May be added to a drawing in a note form or inserted into the title block, when a single surface texture value applies to most surfaces. Exceptions should be indicated on the surfaces concerned.

ALL OVER EXCEPT WHERE OTHERWISE

60

I I

Special surface characteristics are shown here.

•

20

Section A-A

o

Symbols may be located on an outline, projection line or leader line, provided that they can be

'Md from th, bototom 0' d,ht h""~

th

'

dca"'f-~_g._ _ _ _ _~

!------I._ .

~

Correct


I.

E

.024

r-..

---_':':-_---

6

LJ.035 ;j; 2

E

"\ -

Olmen!Slons In mllllmetres Fillet radii R3 min Threads to AS 1275

Vle:w on arrow B

-

SAMPLE DRAWING SHOWING SURFACE FINISH SYMBOLS

~"\

"\ Incorrect

hfUJ 134

MEC076 - 10 -

41

Basic Symbols for Arc and Gas Welding Reference code 1. Symbols for Welding No AS 26 2. Standards Association of Australia code for welding in building No AS 1554 Part 1

Butt welds

General butt

Full penetration butt weld by a welding procedure to be agreed

z

Square butt

II

Single V butt

v

\

\

c/;

h

Flush

Convex Single bevel butt

v Concave

Single U butt

Single J butt


h"4:n 135

MEC076 - 10 -

51

Structural Steel Profiles and Welding Symbols The purpose of this page is to introduce you to some other symbols and abbreviations that are quite common on engineering drawings. Structural steel profiles are not drawn in most cases, nor are welds drawn or sketched as shown on the next page. These are only a few of the total number of symbol and abbreviations available in each area, and are produced here to make you aware of what area of engineering the symbols and abbreviations belong to.

D[I Depth greater than width.

Universal beam

D[I

Universal column

UB

UC

Depth slightly greater than width.

Universal bearing pile

Channel

D[I Depth slightly less than width.

D[[

UBP

[

--I BI--

Angle equal and unequal


D:B:.t

--IBI--

L

200 UB 25 where 200 = D (nominal) 25 = mass in Kg/m

Square hollow section or rectangular hollow section

200 UC52 where 200 = D (nominal) 52 = mass in Kg/m

Circular hollow section

250 UBP 62 where 250 = D(nominal) 62 = mass Kg/m

Round bar or rod

102 x 51 x 10 [ where 102 = D 51 = B 10 = mass Kg/m 127x 75 x10 where 127 = D 75 = B 10 = t

D[Gt

~

dIG--t

d

L

I

•

DIll

SHS or RHS

150 x 150 x 5 SHS 150 x 75 x 5 RHS where 150 = D 75 = B 5 = t

CHS

75 ODx5 CHS where 75 = outside diameter 'd' 5 = t

RD

L

Square bar

Flat a)bar or b)plate (plate 900 to 3200 in 100mm increments)

L

fi lUI 136

JBL

rll W

SQ

a)FL b)PL or

FL

20RD where 2 =

d

20SQ where 20 =

DorB

150 x 8 FL where 150 = W 8 = t

1 MEC076 - 10 - 61

Sample of Welding Symbols as They Would Appear on a Drawing

[7

10

•

10_

•


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137

1 MEC076 - 10 - 71

Standard abbreviations Refer to AS 1100 for the full I H A across flats addendum approximate arrangement assembly automatic auxiliary average

AF ADD APPROX ARRGT ASSY AUTO AUX AVG

B bearing bottom bracket brass building

BRG BOT BRKT BRS BLDG

countersink countersunk head cross-recess head

cup head cylinder

detail diagonal diagram diameter dimension distance drawing

inside diameter internal

ID INT

hexagon hexagon head hexagon-socket head

D dedendum

high strength high-tensile steel horizontal

HD HT HEX HEX HD HEX SOC HD HS HTS HORIZ

head height

CSK CSKHD C REC HD CUPHD CYL

DED DET DIAG DIAG DIA DIM DIST DRW/DRG

modulus of inertia

J jOint junction

JT JUNC

E C capacity cast iron cast steel centre line centre-to-centre, centres chamfer channel cheese head chrome plated circle circular hollow section circumference cold-rolled, steel computer-aided design and drafting computer-aided manufacture concentric counterbore


elevation external

CAP CI CS CL CRS CHAM CHNL CH HD CP CIRC CHS CIRC CRS

galvanise galvanised iron galvanised iron-pipe general arrangement

CAD

general-purpose outlet geometric reference frame

CAM CONC CBORE

L

ELEV EXT

least material condition left hand length longitudinal

F figure fillister head flange flat

FIG FILL HD FLG FL

M machine malleable iron material maximum maximum material condition mechanical mild steel

G

grade grid

LMC LH LG LONG

GALV GI GIP GA GPO GRF GR GD

minimum modification modulus of elasticity modulus of section

k"~J

138

MACH or MIC MI MATL MAX

mounting mushroom head

MIG MUSH HD

N negative nominal nominal size not to scale number

NEG NOM NS NTS NO

P parallel

PAR

part pattern

PT

pipe pipeline pitch-circle diameter phosphor bronze plate position positive prefabricated pressure pressure angle

PATT P PL PCD PH BRZ pi

POSN POS PREFAB PRESS PA

Q quantity

QTY

R MMC MECH MS MIN MOD E Z

radius raised countersunk head rectangular rectangular hollow section reference regardless of feature size required right hand

RAD RSDCSK HD RECT RHS REF RFS REQD RH

1MEC076 - 10 - 81

Rockwell hardness A Rockwell hardness B Rockwell hardness C rolled-hollow section rolled-steel angle rolled-sted channd rolled-steel jOist roughness value round round head S schedule

section sheet sketch spherical spigot spotface spring steel square square hollow section stainless steel (corrosion resistance sted) standard Standards Association of Australia steel switch

MEC076 Engineering Drawing Interpretation 1 Resource Package December. 1998

HRA HRB HRC RHS RSA RSC RSJ Ra RD RDHD

SCHED SECT SH SK SfHER SPI SF SfRSIL

sa SHS

I tangent point temperature thread true position true profile

If IEMf IHD iOL If If

U undercut universal beam universal column

UCUI UB UC

tolerance

V

vertical volume

VERI VOL

W wrought iron

WI

Y yidd point

Yf

CRES SID SAA SI SW

•" it:o 139

[ MEC076 -10 - 9 [

Isometric and Oblique Dimensioning

Exercise 10-1

(not recommended for use in engineering) Exercise: Dimension the isometric drawing from the sizes shown on the orthogonal views.

1.

2.

Projection lines are drawn:• •

Parallel to the plane Up or down for the length and width

•

Out to the side for the height

•

Away from the object.

~[

I

I

020 I

a

I

N

Alternate extensions are drawn out to the left or to the right at 30°.

1.

3.

Dimensions may be placed on the view if they are clear.

4.

Dimension figures are drawn parallel to the projection lines and face the reader.

I I I I I I I I I I I I I I I I I I I

64

IS)

t---

.1

a t<)

~

II

[

L-!~-L________~__~~__J 32

025

120

Wrong


Right

, " it:o 140

I

MEC076 - 10 - 10

Section 11:

Interpretation of drawings/typical assessment questions PURPOSE

In this section you will consolidate the material covered in sections 1-10

Objectives At the end of this section you should be able to:

o

IdentifY components, assemblies or objects.

o

Explain instructions written on a drawing.

o

Interpret information on detail drawings.

o

Interpret information on assembly drawings.

Completion guidance The work may need to be completed inside and outside the classroom if the majority of exercises are attempted.

MEC076 Engineering Drawing Interpretation I Resource Package December, 1998

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141

Interpretation/Sample assessments

Interpretation/Sample assessment questions

What feature of a component is indicated by the following symbols?

Completion guidance: select and attempt suitable questions. In a title block there is a little box with letters SHT (sheet number). What would be the advantage of printing '3 of 7' instead of just 3 in the box?

What is achieved by the notation 'ALL DIMENSIONS IN MILLIMETRES' in the title block?

In a title block there is a little box with the heading 'size' in it. If 'A3' is printed in this box, what information is being given?

The drawing you are looking at has A2 in the size box. The drawing you are looking at is not an A2 size sheet. How could this have happened?

Why are the tolerances applied to dimensions instead of making every component to the design size?

What is one purpose for the use of a materials or parts list on a drawing?

The 'scale' box has the notation 1:2 in it. What information is being indicated here? What purpose is achieved by having numbers equally spaced along the top and bottom edge of a drawing sheet and letters on each end of the sheet? The 'scale' box has the notation 5:1 in it. What information is being indicated here?

What is the preferred projection angle for engineering drawings? A linear tolerance is printed as ± O.5mm UNO. What do the letters UNO stand for?

Sketch the symbol for third angle projection. What purpose is achieved by using different line thicknesses as well as broken lines on the drawing?


i"142iI:rJ


Identify the different line types indicated on the following drawing. They are either an outline, hidden outline, centre line, extension line, dimension line, break line or leader line.

Which of tHe following methods of drawing presentation show all true shapes? Exploded, Isometric, Oblique, Orthogonal or Perspective.

Column

152x76xl8C

Which method of drawing tends to show each component as a complete unit and at the same time makes the finished article easy to assemble?

12

Which method of drawing gives the closest likeness to what the eye would actually see if looking at an object, especially a large one?

rrunion mount6 for nomlnal.0115 cylinder -----I---ltt-tl-~~

4 holt:5,13'1:3 for M12 x 1.75 Hex Ha bo/t5 (~.Iv.) - - - - l h .

Isometric, oblique and perspective drawings are usually single view representations of an object. What is the least number of views that are possible with orthogonal drawings?

4OOx10x500 mount. {

100

5

500

I

What is one advantage that oblique views have over isometric views? ComerA---'

Cylinder

I 4

3

MEC076 Engineering Drawing Interpretation 1 Resource Package

December, 1998

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143

1

7

2

8

3

9

4

10

5

11

6

12

Interpretation/Sample asse56ments

What do the following symbols and abbreviations mean'? What is one advantage that orthogonal drawings have over pictorial drawings'?

0 Why is it necessary to be very familiar with both first and third angle projection'?

R

fCD ([

What part of a component is considered to be the front view'?

fL AF

TYf

Name the following three types of drawing presentation. Choose from orthogonal, oblique, isometric, perspective, exploded.

(758)

~

D Hex

56


", ij:n 144


What is an auxiliary dimension?

What is meant by a grid system on a drawing sheet?

Give one advantage obtained from the practice of everyone working to the same drawing standards?

Give the thickness of the following line types. (Thick or thin).

If you had a drawing with '1 of 8' printed in the SHT (sheet) box, how many sheets would need to make up a complete set of drawings for that particular project?

•

Hidden outline.

•

Centre line.

•

Dimension line .

•

Outline.

The drawing on the following page is dimensioned by using what is called chain

Name the two projection symbols below.

dimensioning .. Complete the dimensioning of the component (by showing the missing sizes) using datum dimensioning.

How is a reference dimension shown on a drawing?

If a dimension is underlined, what does it mean?

What needs to be checked if using a drawing that has been in the workshop for a considerable time, to manufacture a part?

What is one function of a materials list?


"'it J 145


)

20

10

15

10

What type of drawing is the one shown below? (Assembly, sub-assembly, detail assembly or detail.)

15

-<7-

/

I

v-

2 holes 08

6

- -

- -

- -1- )-------["7-_

5

\Q 2

0

N

10

15

y-

5Alu minium PL

20

Chain dimensioning

A

:

3

55 30

4 •

I

"I

.1

2)Oles08

-<7-

/

I

0

LO

7

2

6 5

1

4

V

3 2 ITEM

2 2 2 1

QIY

CAP HANDLE WDY LEG

97-505

PI" SIDE PLATE

97.-504

STEM

97-502

97-507 97-506 97-505

DESCRIPTION

97-503 DRG No

LO

~

t<)

What type of tolerancing would be applied to a component if it had a box of information like the one shown here or similar to it?

5 aluminium PL

B

I11I

Datum dimensioning


'f'146if:n

0.05

I

A

I

-----------------------------------


What information is indicated by the following symbols? What type of drawing is shown below? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

3Jt What is indicated by the note '46mm was 50mm at C/5' on a drawing?

Below are two pictorial drawings, 'A' and 'B'. What type of drawing is at A? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ What type of drawing is at B? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ l!l

;:::: N

2

a a

N

10

4 B (enlarged)

+

+

a a

A

t<)

560

a

l!l

7

6

1063


"':I) 147


You are asked to make a component to drawing number ego (2468/3 issue G). How would you know that the drawing you have been given is the correct drawing?

On a separate sheet and using the orthogonal views given below produce an isometric drawing or cabinet oblique drawing. Complete either a freehand sketch or a drawing using equipment. Name the pictorial shape as isometric or oblique.

On a separate sheet, draw a third angle orthogonal drawing of the following component. There are to be three views; a front view 'A', a top view 'B', and a right side view 'C'. Draw or sketch full size and fully dimension. Take your dimensions, to the nearest mm, from the drawing below.

50 30

'I - ,

"[

B

I

a

• - -1- ,

I"

25

I

I

I

I

t
~I

RJ 16 HOLE 10 1"

~c


1.0 N

i'1i1J 148


Answer the questions related to drawing: 993367

How long is the thread?

What type of view is A-A? Why is the dimension 263 underlined? What is the name for the diagonal lines in view A-A? What scale is this item drawn to? Why do some sizes have a number both above and below the dimension line? What do you call the feature 2 x 45°. What is the name given to the line A-A in the front view? The steps in the shaft have an engineering name. What is it? What does the symbol (N) indicate? What is the overall length of the part? What size sheet was this originally drawn on? What will be the maximum length of the left end of the shaft? Why is the 380 dimension in brackets? What material is specified? What is the symbol at location AS called? What is the general linear tolerance? What size of thread is required? How many sheets make up a full set of drawings?


Ii " i1:O 149


What issue is this drawing'?

What is the drawing number'?

What are the initials of the drafter'?

What angle of projection is indicated'?

The drawing is missing 8 similar items of information regarding the sizes for the part. What similar items are missing'? .

What does NTS mean'? (Section A-A)


", iiI:a 150


,

I

1

I

2

4

3

I

5

6

DO NOT SCALE

A

A

..I.

z

116.0 115.5 80.5 79.5

-

50.5 49.5

·vt

124.0 123.0

I

-

~~~J .....

46

L

A~

B

~.~

08 Grind all over

220.0 219.5 179.5 178.5

Section A-A (NTS) B

I

I

eI

-- ---

-

------

-----

----------

--

r---

I

I

1~2X45O

I

I

A~

c

-

c

263 (380)

-

,...-

UNLESS NOTED OTHERWISE TOLERANCES ARE:

0

LINEAR

±0.1

UNO

@-E3MATERIAL MILD STEEL

20-8-97 A FIRST ISSUED ISSUE DATE ZONE

JD CHANGE

ECN

BY

AMENDMENTS

1 MEC076 Engineering Drawing Interpretation I Resource Package December, 1998

I

2

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WL CKD

ANGULAR N/A DRAWING PRACTICE AS 1100

DRAWN

JD

TRACED

WP CHECKED WL ArPRCNED KA ISSUED 20-8-97

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MANUFACTURING AND ENGINEERING EDUCATIONAL SERVICES CONSORTIA

0

TITLE

SHAFT

RECORD OF ISSUE

FINISH

A

AGNOTED

4

3

i"151it:a

I I I I I I

I I

SCALE 1:2

SIZE IDRG W A3 5

I SHT 40F7

993367

I

6


Answer the questions related to drawings 124 sheet 1 and 2 of 2

Drawing 124 sheet 2 of 2 What type of drawing is this? (Assembly, detail assembly, detail, pictorial)

Drawing 124 sheet 1 of 2 What type of drawing is this? (Assembly, detail assembly, detail, pictorial)

What is the latest issue?

What date was issue A released on?

How many washers (Item 5) are required for each assembly? What are the initials of the drafter? What do the numbers inside circles with a leader pointing to a part represent?

Grind

O.4r" meanf In zone A1 what does fI

a)/ _ _ _ __ Was the drawing made to scale?

b) 0.4 _ _ _ _ _ _ _ _ c) Grind _ _ _ _ _ __

Some information relating to Item 1 in the notes is given twice (repeated). Is this good practice?

How many parts make up one full assembly?

Zones D3 and B5 have letters AS in them. What does AS stand for? What drawing number would you need to obtain to manufacture Item 6? What material is Items 2, 3, 5, 6, 7, and 8 made from? Give the full description. What units are the dimensions in? If Item 4 was to be made from HSS, what would the full description be? What item number does Item 3 screw onto?

Zone B11tem 3 has thin lines at 45° across it. What are these lines called? What is the purpose of Item 7? What is the maximum & minimum of size 13 on Item 2 in zone B3? _ _ _ _ _ _ _ __


,"-:1 j 152

Interpretation/Sample asse55ment5

Page 153


1

I

I

2

4

3

I

5

6

ALL DIMENSIONS ARE IN MILLIMEIRES DO Nor SCALE

A

A 300

I--

I

I

1

1

i i i

i i i

~

B

r-_-L-=-

-

-

I

I

I

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c

~

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x

<

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I

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-

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9 8

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r-ASSEMBLY

124 SHT 2 ITEM 9

"

BLOCK

1

124 SHT 2 ITEM 8

"

NUT

1

124 SHT 2 ITEM 7

6

NUT - TRAVERSE LOCKING

3

124 SHT 2 ITEM 6

S

WASHER

3

124 SHT 2 ITEM 5

4

SCRIBER

2

124 SHT 2 ITEM 4

3

NUT

2

124 SHT 2 ITEM 3

2

LEG

2

124 SHT 2 ITEM 2

1

BEAM

1

124 SHT 2 ITEM 1

l'"-LJ:

ITEM UNLESS NOTED OTHERWISE TOLERANCES ARE:

D

LINEAR

NfA

-@--E3--

ECN

JR BY

AMENDMENTS

I

2

I

WC ANGULAR CKD DRAWING PRACTICE AS 1100

3

DRAWN

JR

TRACED

--

DESCRIf'lION

C

FINISH

A NfA

4

REF DRWG No

MAfERIAL

TilLE

APPROVED TC ISSUED 20 -12 - 97 RECORD OF ISSUE

NlA

No OFF

-

MANUFACTURING AND ENGINEERING EDUCATIONAL SERVICES DIVISION

.II

CHECKED WC

MATERIAL

NlA

22/12/97 ZONE ORIGINAL IS5UE DATE ZONE CHANGE

1

1

I

7

A ISSUE

SCREW

ADJUSTING

I I

I I

TRAMMEL SCALE Nrs

SIZE DRG N° A3

5

I 1SHT OF 2

124

I

6

D

Page 154


I

1

I

2

3

a

DO NOr SCALE

-II

III

35

300 A~_ _ _ _ _ _--;

I!l

1 04

I'V

Gri:"

151' I"

"I

:L

(see note 4&7)

06

f:\

\2/

BEAM - 1 OFF MATL: SILVER SrEEL

03.2

4.5

drilllJlJ:~~~~=fj

-~

--

ttf ---'-..--->>j/F 60° inside & -

B

03.5

outside taper

o

~

±o.t

I' -.J

- M6 x 1.0

6

J

in

8--=11:--EF-lf--:I

I j

t

\V

NUT-20FF MATL:M.S.

lr--t-~~~i====J_-L---___ll

Rl

--

-F - -

- -

/ '

06

M3 x 0.5 x 6 deep (1 leg only)

-

12

E

:;: C

I!l l
I I

a

'I __~ -II

_[ "-

OJ Ol

a

'"

~ -'"

---+--r.h.- ~

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-

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@ o

+

see note 7

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~_:+

_=t.___ _

+ I

I

-~-I- ~

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ADJUSTING BLOCK -1 OFF MATL:M.S.

j-

®

l
5 ±0.1

WASHER -3 OFF MATL: M.s.

•rn;-Rl-:l~'<'l-.----1. ,'----

f'6\

TOLERANCES TO BE WlTHIN ±O.s UNLESS SHOWN OTHERWlSE.

4

SURFACE FINISH GENERAL TO BE

2

I

ITEM 1TO BE A "SLIDE FIT' IN ITEMS 5 & 8. THIS CAN BE

c

ADJUSTING SCREW BLOCK NUT NUT - TRAVERSE LOCKING WASHER SCRIBER NUT LEG BEAM

.. ..

1 1 1 3 3 2 2 2 1

35 x .03.5 M.S. BAR 35 x.012 M.S. BAR 4x.014 M.S. 12 x.016 M.S. 12 O.D. x 8.5 !.D. x 1.5 M.S. .03 H.S.S. OR SILVER STEEL 15 x.012 M.S. 90 x .012 M.S. 300 x.06 SILVER STEEL BAR

JD AND ENGINEERING 1=~~__~~~llTE."M ;I_D:ESC_R_I~_IO_N__MANUFACIURING ~~~Q~TY~~~~~M:A~TE~R~IA~L~~ ____-4 0 WP EDUCArlONAL SERVICES DIVISION

MATERIAL AS LISTED

3

DO NOT SCALE OFF DRAWlNG - WORK TO DIMENSIONS.

7

,.!'RAWN TRACED

0

I

6

9 8 7 6 5 4 3 2 1

suit5mm slitting saw)

r - - - - + - - - - - 1 - - - 1 - - - - - - - - - - - - - - - + - - + - - I - - I U N L E S S NOTED OTHERWISE 1 - - - - + - - - - 1 - - - 1 - - - - - - - - - - - - - - - + - - + - - 1 - - 1 TOLERANCES ARE:

1

x 45 0

both sides

(to

A 15 - 5 - 97 ISSUED FOR PRODUCTION J D W L ANGULAR ± 0 15' I-'S_S_U_E-'--'.D"-A"'TE=---=ZO"'N-=E:.L_____---=C:.:..H:.:..A:.:..N=-G=-E_ _ _ _ _ _L-.::EC:::N~L..::B:":'Y-L,:C::K:.:::.-DI DRAWING PRACTICE AMENDMENrS AS 1100

~

REMOVE ALL SHARP CORNERS WlTH A SMOOTH FILE.

THE BEAM WlTH FINE EMERY TO SUIT A 06 REAMED HOLE.

NUT rRAVERSE LOCKING - 3 OFF

±0.5 UNO

-

'0/'

PRODUCED BY REAMING TO SUIT THE 06 BEAM. OR BY BUFFING

0.75

Fine knurl--'1

B

ADJUSTING NUT -1 OFF MATL: M.S.

3

BEARING SURFACES (ITEM 1) TO BE

\::y MATL: M.s.

~-_+---_l_--_l_-------------~--~--+-~LlNEAR

(I)

spherical

5

I I

-M8 x 1.25

L Fine knurl

R6

-M8x1.25

.:

-M3xO.5 0.75x45°

Fine knurl NOTES 1 UNLESS SHOWN OTHERWlSE DIMENSIONS IN MILLIMETRES. 2 ALL M.S. TO BE PER A.S. 1442-1973/S1020.

-M8x1.25

0.75x45 0

..

I--

Rl

see note 7

012

. f

iF

: ,JI \ ~06ream

MATL M S

:

-

~-

II~. til P .- ~ ~}- -

04.5±0.1

(';;\2 LEG - 2 OFF

I

30

(ref)

M6 x 10-

Fine knurl

-_-1---4.,"'7 ±0.1

15 min

L ~f

03ream----;--] x 15 deep 2 slots thru 0.5 x7deep

90

A

~13:...::±0=-.::.1~:-=-2 ±O.l

12 min

max ,6mln

SCRIBER - 2 OFF MATL:03 H.S.S. OR SILVER SrEEL HARDEN AND rEM PER

M3 x 0.5 both ends

15

9

/0.75 x 45°

ADJUSTING SCREW -1 OFF MATL: M.S.

®

15 06.5· 05 ±0.1-

:1

22

-U-+----&=h

~-f-------'~--------~

A

6

5

4

FINISH SEE NOrES

~C::.:H::.:EC::.:K::.:ED~-y::WuL~~rlrLE

APPROVED J RP ISSUED 15 - 5 - 97 RECORD OF ISSUE

TRAMMEL DETAILS

~A~-+--IIf-+--lSCALE

I

4

1:2

SIZE DRG N° A3

5

SHr

124

1 20F 2

6

Answer the questions below related to drawing 02-MF1-MY98 When was this drawing issued?

What do you call the diagonal lines in Section A-A?

What is the name of the component?

How many pieces are used to make this item?

What size is the oil hole?

What sizes of welds are used?

How many holes have to be drilled .0121'

How thick is item 21'

What is the overall height of the finished item?

What are the overall dimensions of item 11'

What is indicated by the projection symbol at position D4 in the Title Block?

What material is specified?

What is the name given to dimensions like .0441'

What are the general tolerances?

What do you call the symbol marked B?

What does UNO mean?

What welding is specified by the symbol marked A?

What issue is this drawing?

How far is the oil hole from the edge of the cylinder?

What distance are the.012 holes in from the two edges? Longedge ____________________


• " iI j

155

Sho~edge

____________________


1

2

I

I

r

I

*'1'

I

I

iI

(9-

I I

a

a

N

- - -

«)

- -

- -

-; -j- - -1- -

- -

I I I

~

I I I I

"

... -I"''' ,

A «)

[

-II - -

- -

- -

- -

- -

--'----+-- {~ , '-V; ,

-"

,

,

I

I I I

II I

'I' "

'1-

I

I---

{~ , ,'-V, " -"

.

,

80

I-A

B

B

R35

..I-

3

...L.

I, - - I ---

-

,

. r0 44

- - I- t-

-

a

-

c

a

-

I,

.o0

~44.05

I

I---

2

,I 11---8 , I

c

r-

PARTS LIST

,- tI.1---_19;;3_5V~~_ty_p ' --+!-"'~:'-"0o'--------"-iT .1 ,

:I,

t

,/

rr, I,

I,

L

I ,-------1-----

A

I,

¥

I ..

NOTE:

,I,

A

All welds 6 fillet unless indicated otherwise

@--E f-~:-;E-ND

UNLESS NOTED OTHERWISE TOLERANCES ARE: LINEAR: ± O.S

D

ANGULAR: ± 0 0 A

ISSUE

7/3/98 DATE

fir5t issue

ZONE

CHANGE

ECN

LZ

BB

BY

CKD

AMENDMENTS 1 MEC076 Engineering Drawing Interpretation 1 Resource Package December, 1998

I

6

4 holes 1012

:I ''I'' , :I -1'

I--

" "

I

5

:~-1'- \

'/

rr--ti-I hLy-..., A

r

103 oil hole

4

3

2

I

-

---=LZ'---_ _ "

M.S.

FINISH

DRAWING PRACTICE AS 1100

UNO

3

i"

it J

156

ROUND BAR

1025x6

MS

4

MINOR WEBS

70x8x56

MS

3

ROUND BAR

1060x80

MS

2

MAIN WEB

200x8x135

MS

1

BASE PLATE

200x10x120

MS

ITEM

DESCRIPTION

MATL

SIZE

MANUFACTURING AND ENGINEERING EDUCATIONAL SERVICES CONSORTIA

D

)-C_HE_C_KE_D_J_B_ _--JTITLE

MATER'AL:

30'

;1"1"

5

12~

APPROVED BB ISSUED 7 - 3 - 98 RECORD OF ISSUE

I-'A-+-I---l--l--I SCALE 1:2 4

SHAFT SUPPORT BEARING

I

SIZE DRG N° A3 5

02 - MF 1 - MY 98

I

I

1SHT OF 1

6


Answer the questions related to drawing: A671-3

What diameter hole is required in the mounting bracket?

What type of material is used to manufacture the scrubber? What are the dimensions of the scrubber cylinder, item D? diameter ____________ length ___________________

How many mounting brackets are required?

What size mild steel angle is used to fabricate the diameter 0800 ID (inside diameter) flange? What thickness of material is used to manufacture the mounting brackets?

Why is the drawing classed as a detail assembly? What type of weld is used to weld the mounting brackets on to the scrubber body?

What issue is the draWing? Item H refers to the 200 OD (outside diameter) cylinder. What is its length?

What scale is used? Item F is:'a square to round transition. What are the following dimensions? bottom diameter _ _ _ _ _ _ _ _ _ __

topsquaro _ _ _ _ _ _ _ _ ___

What type of weld is used to join the transition item F to the spigot item E?

What after-weld treatment is given to the inside of the vessel?

What surface treatment is given to the completed assembly?


, ,'iI)

157

Interpret;ation/Sample assessments

I

1

I

2

3

2300 00 200

5

4

6

DO NOT SCALE

1000

700

300

600

A

"\, I )1---------------------I~'

-------"-= ' ", ~

~-IE8-~--:::.11

A typ RIGHT HAND SIDE VIEW " ...

" / , , '". . n ~

,

" II

1_ JL -.-.-.-.----

-

a

II

G d.)

I, 11

~

B

~

I

N

...

.'~~=._._==_=_~==-=-=~~=:i! -- ~

-

1

b

I I

--"I

_'/~'~-~~

I I

r-----=- _-:..__-:..~""

_--------.. ------- __________

~

I

.---~ ------------- ------------~--

,

,!

I~

2

J

I

F

. /KI/\

f--=-,--=10,---,----0-=-

~

25

i

~

[I ~

I-

I

'"

-._-'l" -

,

~~o

50 x 50 x 6 M.S, an91e

.1

150

I I I I I

B 10-4-95 A3 300WAS290 A 10 - 3 - 93 ISSUED FOR PRODUCTION ISSUE DATE ZONE CHANGE

147/95

JD JD

ECN

BY

AMENDMENTS

1 MEC076 Engineering Drawing Interpretation 1 Resource Package December, 1998

I

2

I

I

f--

?50 O.I?

1

4O~0.D

c

~

I,

Details:

I--

1. material 3 mild steel plate. (UNO)

'-

-;:;

2. completed assembly to be hot dipped galvanised. 3. all seams either metallic arc or MIG welded and

6

ground flush on the inside of the vessel.

D 1 - - - 1 - - - - 1 - - - 1 - - - - - - - - - - - - - - + - - - + - - 1 - - 1 UNLESS NOTED OTHERWISE LINEAR

=--r

:...

DETAIL UN Mounting bracket 4 required

1-_-1_ _ _-1-_-1-_ _ _ _ _ _ _ _ _ _ _ _-+_ _-+_-1-_ TOLERANCES

-=.1

Alternate traneition

I I

Q

IA

J=i

(150) 50

'-<----.018 -r -q

a

; 1

I I I

a

.04000D

~t ~\"'" Detail uB"

Typ 1I

,

03000D

150

B

r--I-----l-~

'--

c

2

-==rI

~~I\/

FRONT VIEW

a

'-

I I

!

I

-r0J ,~ / ~ B l/

Q~I\ :

2

~

i

"

I--

-'-'-r-'

"'''''''

I 1

!!

>---

.-.---""'~"" -.-

A

~~,

1/

-

,

ARE:

±0.5

KA ANGULAR 0.5 0 WL CKD DRAWING PRACTICE A51100

ri\ d

W-.:...:::..r MATERIAL

~DRAWN~JD_III ~ TRACED

FINISH

3

KA

ISSUED 10 - 3 - 83 RECORD OF ISSUE

I I I

I.YI 4

i or' i! 'II 158

. . ,,' ,

f.:C::.H:::EC=K:::ED~____1CWUL~_I TITLE APPROVED

AS LISTED

WP

I

B

I

SCALE

1:10

;I

::n

MANUFACTURING AND ENGINEERING FDllr.ATIONAL SERVICES c()NSORTIA

D

AIR POLLUTION CONTROL SYSTEM SCRUBBER DETAIL ASSEMBLY

I S~~lDRGN" 5

A671-3

I

SHT

30F8

6


Answer the questions relating to the diagram The diagram shown is an architectural diagram. They have another common name. What is it'?

r----- ---------------------- - - --.,

What is the purpose of an architectural diagram'?

:I

CQo

I

What do the dashed lines inside the various rooms represent'? ( - - - - - - )

I

®

I I

:I

I I I

How many ceiling lights are required,? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

I What does the symbol I MSB

I Represent'? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

I I 1

I

How many ceiling fans are required,?

I

I L___

T,

I I

01

®

' :

--_, I I . ' , m

__

I

'

~----L---*----J

:: : : , I

I I

L---:--Q9----r---+----0 , , ' : ____ J

I I

!I I

~ I I I I

r

I

I ________________________________ I L ~

What additional information would you require to work out what minimum length of wiring you would need to take'?

What does this symbol represent'?

.fr __________________

How many single power points are required,? __________________


", iI:a 159


Section 10: Basic and common symbols recognition

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