Roll No. ......................

Total No. of Questions: 08J [Total No. of Pages: 03.

M.Tech.JIG, FIXTURES & DIE DE~IGN

SUBJECT CODE: PE -508

Paper ID : [E0447][Note: Please fill subject code and paper ID on OMRI

.Maximum Marks: 100Time: 03 Hours

Instruction to Candidates:

1) Attempt any Five questions.2) All questions carry equal marks.

QI) (a)

(b)

Q2) (a)

(b)

What is six-point location principle? Explain it with the help of suitablesketches. . . .

For 'what purposes' are indexing jigs and fixtures used. List theoperations. Suitable for the use with indexing fixture.

What are the main types of jigs and fixture construction? State theadvantages of each and discuss the relative merits of each.What is meant by angular location? Explain it for locating a connectingrod for machining. .

Q3) Design and dniw a drilling jig to drill the holes in the compOIientgiven inFigure - 1.

1i

(DimensiOns in mm)

Figure-1 (The Length of the bush is 50 mm.)

M-1557 [1859J R1:0.

Q4) (a)

(b)

Q5) (a)

Q6) (a)

M-:1557

What are<the major dis~dvaritages of a nest type locator?

Desigri a 3-2-1 locating system to locate and support the part shown in

figure- 2. - O.50R (2 pies)

2.00

-L

r- 3.00II . I

-L0.7S1T

. (Dimensions in mm)

Figure~2

(b)

,

Explain the advantages to be obtained fr°l1!the use of pneumatic and

h¥draulic clamping device. .. .

Explain with diagram the following types of clampi) C-clamp.

ii) Bayonet clamp.

iii) Quick Acting clamp.

iv) Cam operated clamp.

(b)

Define: Allowance, clearance,. interfe'rence, interchangeability," funqamentaldeviationzero line.

Give the designation for:

i) 30 mm H - hole to the tolerance grade IT6. .

ii) 30 mm f- shaft to the tolerance grade IT?iii} the above fit.

What do you mean by transfer machines? Explain two types of transfermachine~ with diagram. . ".

(c)

2

Q7) The symmetrical-cup workpiece shown in Figure - 3. is to be made fromcold rolled steel 0.8 mm thick. Make necessary calculation for designing thedrawing die for this part.

Q8) (a)

(b)

(c)(d)

W-155?

I--- 50 J

I --i :r-°.e

.~ ~1~o

~l(Dimensions in mm)

Figure-3

Define: Die Block, Knock out.

Sketch: Progressive die, Combination die.

Why more than one draw is needed to draw'a cup?What is push through and an inverted draw die?

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3