1Grapple skidder

2

Forwarder

3http://www.unified-eng.com/scitech/weld/weld.html

TYPES OF WELDS AND THEIR SYMBOLS

Square groove

V groove

Bevel groove

U groove

J groove

Flare v groove

Flare bevel groove

4

FILLET WELD

5http://www.unified-eng.com/scitech/weld/weld.html

Fillet weld

FILLET WELD

6http://www.unified-eng.com/scitech/weld/weld.html

SQUARE GROOVE WELD

7http://www.unified-eng.com/scitech/weld/weld.html

V groove

V GROOVE WELD

8http://www.unified-eng.com/scitech/weld/weld.html

Bevel groove

BEVEL GROOVE WELD

9http://www.unified-eng.com/scitech/weld/weld.html

U groove

U GROOVE WELD

10http://www.unified-eng.com/scitech/weld/weld.html

J groove

J GROOVE WELD

11http://www.unified-eng.com/scitech/weld/weld.html

Flare v groove

FLARE V GROOVE WELD

12http://www.unified-eng.com/scitech/weld/weld.html

Flare bevel groove

FLARE BEVEL GROOVE WELD

13

PLUG AND SLOTS WELDS

14

For same strength, longer leg size cost more. Use smaller lag size with longer length.

DON’T DO

15

Use symmetric sections for automatic welding

DON’T DO

16

Design simple to save welding cost

DON’T DO

17

Use minimum amount of weld metal

DON’T DO

18

Design for easy accessibility to welding

19

Arrange the welding layout which reduces welding cost

20

21

22

23

C C

C

Better Worse

Improved design

24

25

Better Worse

Improved design

26

Better Worse

Improved design

27

Better Worse

Improved design

28

29

30

31

32

33

34

35

36

Risk Priority Number

RPN = R occurrence x R severity x R detection

 

RPN = 1 failure is highly unlikely and

unimportant

RPN = 30 it is OK

RPN = 100 failure will occur

RPN = 1000 hazardous and harmful failure

will occur

 

FMEA OF WELDMENTS

37

38

39

40

41

42

43

44

01 bad 02 better 03 better 04 best

joint01.sldasm

45

u plate and shaft.SLDASM

46

yoke.SLDASM

47

\wledments\plate02.sldprt

48

\wledments\TRUSS.sldprt

49

\wledments\ROPS.sldprt

50

\weldments\arcframe_mod01.sldprt

51

\weldments\arcframe_mod01.sldprt

52

\weldments 03\window01.sldprt

53

\weldments 03\window02.sldprt

54tube and lug.sldasm

55

tube 02.sldprt

Configurations 03, 04

56

57

0.125”

58

59

60

Terminology differs depending on standard

61

62Plug weld which is called filet weld in SW