Methods of indexing

ppt

1. METHODS OF INDEXING Batch No :- 00 9

2. MILLING: - Milling is the process of removing extra material from the Work piece with a rotating multipoint cutting tool ,which is a milling cutter. INDEXING:- Indexing is the operation dividing the periphery of the Work piece into any number of equal divisions by using indexing head. METHODS OF INDEXING:- Direct indexing Simple indexing Compound indexing Differential indexing Angular indexing

3. Simple or plane indexing More Accurate Permits divisions of work piece into more no of parts 1 turn of the crank rotates the work piece by 1/40 of revolution

4. Brown and S harpe Heads No.1 plate has 15,16,17,18,19,20, holes No.2 plate has 21,23,27,29,31,33, holes No.3 plate has 37,39,41,43,47,49 holes Cincinnati and P arkinson Head different series of holes are provided on each side One side 24,25,28, 30,34,37,38,39,41,42,43. holes Other side 46,47,49,51,53,54,57,58,59,62,66. holes

5. Hole Circle Plate

6. Rule for Simple indexing index crank movement =40/N Calculating indexing for 35 divisions The index crank movement =40/35 =1(5/35) = 1(1/7) =1 (3/21) Thus for indexing the crank has to move one complete turn and 3 holes in 21 hole circle of the index plate

7. Compound indexing

8. Actual indexing fraction 40/91=(a/39+b/49) 40/(13 X 7) =(a/13 X 3) + (b/7 X 7) (40 X 21) =(49a+39b)/(13 X 3 X 7 X 7) 840 = 49a +39b a=6 and b=14 Crank rotates through 6 holes on a 39 hole circle Index plate and the crank together rotate through 14 holes on a 49 hole circle in the same direction…..

9. Prepared By :- Naveen Kumar (13B61A0309) Mallikarjun (13B61A0327) Akhil Babu (13B61A0346) Sudheer (14B65A0303)