Stud welding can be described as the joining of a metal stud to another metal workpiece by means of arc, resistance, friction, or other appropriate welding process.

The stud-weld symbol is always shown placed below the reference line, Figure 21.1, with the arrow of the welding symbol pointing to the surface to which the stud is to be welded. An arrow side significance is applied to the symbol. However, it is not used with an other side or both sides significance.

When specifying a stud weld, the arrow of the welding symbol points to the surface to which the stud is to be welded and not to a prepared joint. Therefore, the arrow is not shown with a break when indicating stud welds.

Three elements may be applied to the stud-weld symbol: stud size (diameter), stud spacing (pitch or center - to-center spacing), and the number of stud welds. The stud size dimension is placed to the left of the stud-weld symbol, the number of stud welds is placed in parentheses below the symbol, and the pitch is placed to the right of the symbol, Figure 21.2. The length of the stud is shown on a detailed drawing.

FIGURE 21.2 ■ Application of size, pitch, and number of stud welds to the stud-weld symbol.

FIGURE 21.3 ■ Dimensioning equally spaced stud welds.

To show the location of studs to be welded in a straight line with equal center-to-center spacing, the spac­ing (pitch) dimension is applied on the right side of the stud-weld symbol. In addition, the location of the first and last stud is dimensioned on the drawing. A welding process reference stud weld (SW) is included in the tail, Figure 21.3.

When stud welds are to be made in a straight line with unequal spacing, or in a configuration other than a straight line, the location of each stud must be dimensioned on the drawing, Figure 21.4. Note that multiple arrows may be used in such cases.

8 (2) FIGURE 21.4 ■ Dimensioning unequally spaced stud welds.

Graph paper is provided at the end of each review for your use.

1. Identify the elements applied to the following welding symbol:

14

3

(6) .

SW

TYP

2. a. Explain what is wrong with the following welding symbol:

b. Sketch the welding symbol in 2(a) so that it is shown correctly.

3. Complete the following sketch by adding a welding symbol to indicate four stud welds centered on the workpiece and in a straight line, 3" on center with stud size. Include all dimensions necessary for locating the stud welds. Use hypothetical dimensions where necessary.

4. Complete Sketch B by adding a welding symbol to indicate the stud welds required in Sketch A. Include all necessary dimensions. Stud size is 3/4" and the welds are to be typical. The length of the stud is to be 3".

SUMMARY REVIEW NO. 3A

1. Sketch the weld symbols for the following:

Surface weld J-groove

V-groove Spot

Plug weld Melt-thru

Slot weld Bevel groove

b. Describe the significance of the references included in each of the welding symbols shown.

(3)

2. Match the elements in Column B that may be applied to each given type of weld in Column A. (Items in Column B may be used more than once.)

<

RSEW

Column B a. size b. length c. strength d. included angle e. pitch f. increments g. side of joint h. extent of welding i. contour __________________________ j. method of finish k. field weld 3. Sketch the appropriate symbol for each of the following: a. field weld b. weld-all-around c. convex contour 4. List the finish abbreviations used with contour symbols and give the meaning of each.

Column A Fillet welds

(4) /■

<

FW

Groove welds

(5)

<

NOTE #2

Projection welds

Plug welds

(6) /■

SEC D-D

Slot welds

(7)

<

ТВ

/ (8)

-<^p3

(9)

<

BACKING

WELD

(10) /

/Ivl < 8X 4 NSAE1040

5. a. What type of information is usually placed in the tail of a welding symbol?

6. When is it necessary to use a break in the 11. Complete Sketch “B” to show the significance

arrow line of the welding symbol? of Sketch “A.”

7. Draw the symbol for a /2" fillet weld on the arrow side made flat by chipping, and a 3/4" fillet weld on the other side ground to a convex contour.

SKETCH "A" SKETCH "B"

8. With a sketch, show how a welding symbol is applied to indicate a slot weld.

12. Interpret the significance of each item of

information on the following welding symbols.

a.

9. a. Describe the elements contained in the following welding symbol.

2- 4

3- 5 TYP

b. Explain why multiple arrows are sometimes applied to a welding symbol.

a. b. c.

10. Apply the dimensions to Sketch “B” indicated by the welding symbol shown in Sketch “A.”

d

16. Complete the following welding symbol to indicate the weld required.

WELD REQUIRED:

FILLET WELD-ALL-AROUND

e.

13. a. Identify the joints shown in the following sketches.

b. Identify by name each of the weld symbols indicated.

(a) (a) .

(1)

17. Complete the following welding symbols by adding the weld symbols indicated.

a. An arrow side fillet weld made in the field.

b. An other side fillet weld-all-around made in the field.

(2)

(a) _ (b) .

18. Show the preparation of the joints by using dotted lines and the welds formed by using solid lines for the following symbols:

(3)

(a) _ (b) .

(4)

(a)

(5) j (a).

	N
	7

----------------- 1-- (b)

19. Apply a welding symbol to the following sketch using a double reference line to indicate square groove welds on both sides, followed by fillet welds on both sides.

14. How is a thermit weld indicated on the welding symbol?

20. a. Which weld is the first weld to be made as indicated by the following welding symbol?

15. Describe the difference between a weld symbol and a welding symbol.

b. Describe each of the elements shown.

(1 x 1) 4 2 ' ■ 6-10

TYP____________________

Y___________________

22. Explain the significance of the elements shown in the following welding symbol.

M.

BACK GOUGE _

23.

c. Prepare a sketch that illustrates the welds required by the welding symbol in 20(a) with application to a T-joint. Include the welding symbol shown in 20(a).

Complete the welding symbol for the following: a single V-groove on the other side, grooved to a depth of 1;2", /4" groove weld size with 3/б" root gap or spacing and a groove angle of 65°. Weld is to be a flat contour with an indication that the method of finish is unspecified.

21. a. Identify the sequence of welds specified in the following welding symbol:

(1)_

(2)_

(3)_

b. When is the back gouging to be performed?

24. Sketch the weld symbol used to indicate a weldment with a backing. Include an indication that the backing material is to be removed.

25. Complete the welding symbol to indicate the following: a single V-groove weld on the arrow side, grooved to a depth of %" with %" root opening and 65° included angle. Weld to be chipped flat-faced on arrow side. On the other side there is to be a back weld, which is to be ground to a convex contour.

c. Describe the dimensions applied to each of the weld symbols shown in 21(a).

1(- 4 ^ 16

26. Complete the welding symbol to indicate the following welds:

Complete the welding symbol to indicate spot welds of 600 pounds shear strength per spot to be spaced on 2" centers. Weld is to be on arrow side.

b. Show how the weld would appear using Sketch “B” for this purpose.

28. Complete the welding symbol to indicate six spot welds with a shear strength of 2000 Newtons per spot, pitch of 50 millimeters, welds to be on the other side, and process to be electron-beam welding.

29. Where is the depth of filling placed on the slot welding symbol?

34. Sketch the welding symbol that indicates the following weld.

30. How does a slot weld differ from a plug weld?

35. Give the significance of each of the elements shown in the following welding symbol. Prepare a sketch that shows the welds required for the symbol given.

31. Complete the welding symbol to indicate intermittent seam welds with a shear strength of 3000 pounds per inch. Welds to be 2" long on 5" centers, and are to be welded flush on arrow side. Welding process to be gas tungsten arc welding.

32. Complete the following symbol to indicate a 3/16" thick surfacing weld on arrow side machined flat.

33. a. Sketch the symbol required to indicate the following slot weld. Include reference to Detail “A.”

36. Sketch the welding symbol that will indicate the joint preparation and other elements required for the following illustrations.

37. Apply a welding symbol to the following sketch to specify an edge weld with a %" thickness.

38. Complete the welding symbol below to

illustrate a 3/4" plug weld on the arrow side with angle of countersink 30° and 6" spacing. Weld is to have a flat machine finish.

39. Draw the weld and show all dimensions given on the following symbols:

b.

c.

d.

40. List the information given on the following symbols:

a.

41. Sketch three joints to which the edge weld symbol may be applied. Identify those joints that primarily have application to sheet metal joinery.

EDITOR'S NOTE: REDUCED PRINT. FOLLOW STATED DIMENSIONS ONLY. NOT TO BE SCALED. A LARGER DRAWING IS PROVIDED AT THE BACK OF THE TEXT.

SUMMARY REVIEW NO. 3B

The questions that follow refer to the Motor Support Frame drawing, page 249.

1. Name the views that are used to show the part. 8. What types of structural metal shapes are

needed to fabricate the part?

2. a. List the types of lines used on the print.

9. Sketch the symbol used on the print to signify a pipe thread.

10. How many surfaces are to be finished?

b. What type of line is used to show the bend line?

11. What method of dimensioning is used?

c. Identify the methods for making circular holes in the part.

12. a. List a general note found on the print that refers to the size of the fillet weld.

3. How are openings designated by the letter “A” to be made?

4. a. What size hole is specified for the 1V8" square head bolt?

b. What tolerances are specified for holes?

b. Show the significance of this specification by means of a sketch.

13. Sketch the different welding symbols found on the drawing. Explain the significance of each. Use graph paper provided for answers.

14. What is the groove weld size of all groove welds?

5. Give the dimensions for distances: 15. Why are pints welded on both sides?

d___________________ <S ____________________ _____________________________________

(t_____________________ a_______________________ 16. Sketch those symbols found on the print that

indicate that joint preparation is required. Identify

each.

<s d-------------------------------------------------------------

6. List the overall dimensions of the part. 17. Identify the views shown on the drawing.

7. A 3/8" thickness of shims is specified for one of

the parts. Give the number and sizes of shims T1 ,

, , , 1-1-1 18. How many 2 X 6/4 X 7V2 plate pieces are

to be used to make up this thickness.

required?

19. Identify Item 12 as listed on the print. 21. a. Sketch the symbol for a finished surface.

20. List two dimensions found in the section drawing considered to be reference dimensions.

b. How many surfaces are to be finished?

Quantity Represented	Name	Symbol
Length	meter		m
Mass	kilogram		kg
Time	second		s
Electric current	ampere		A
Temperature	Kelvin (or Celsius)		К (°С)
Amount of substance	mole		mol
Luminous intensity	candela		cd

TABLE 22.1 ■ SI base units.