ME 251 Anupam Saxena Professor Mechanical Engineering

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TA 101 T hink and A nalyze Anupam Saxena Associate Professor Mechanical Engineering Compliant and Robotic Systems Lab Indian Institute of Technology Kanpur.
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ME 251 Anupam Saxena Professor Mechanical Engineering Compliant and Robotic Systems Lab Indian Institute of Technology Kanpur

PART AND ASSEMBLY DRAWINGS: EXAMPLE III Feed Check Valve ANUPAM SAXENA ME 251 LECTURE IV PART AND ASSEMBLY DRAWINGS: EXAMPLE III Prepared by Anupam Saxena, Vitthal Khatik and Ishu Agrawal

PART AND ASSEMBLY DRAWINGS: EXAMPLE III Feed Check Valve Something left out --- what is it? 1 BODY (CAST IRON) ANUPAM SAXENA ME 251 LECTURE IV PART AND ASSEMBLY DRAWINGS: EXAMPLE III Prepared by Anupam Saxena, Vitthal Khatik and Ishu Agrawal

PART AND ASSEMBLY DRAWINGS: EXAMPLE III Feed Check Valve 1 BODY (CAST IRON) ANUPAM SAXENA ME 251 LECTURE IV PART AND ASSEMBLY DRAWINGS: EXAMPLE III Prepared by Anupam Saxena, Vitthal Khatik and Ishu Agrawal

PART AND ASSEMBLY DRAWINGS: EXAMPLE III Feed Check Valve Something left out --- what is it? 2 COVER (CAST IRON) ANUPAM SAXENA ME 251 LECTURE IV PART AND ASSEMBLY DRAWINGS: EXAMPLE III Prepared by Anupam Saxena, Vitthal Khatik and Ishu Agrawal

PART AND ASSEMBLY DRAWINGS: EXAMPLE III Feed Check Valve 5 VALVE SEAT (GM) 6 GLAND (GM) 7 HAND WHEEL (CI) 3 SPINDLE (MILD STEEL) ANUPAM SAXENA ME 251 LECTURE IV PART AND ASSEMBLY DRAWINGS: EXAMPLE III Prepared by Anupam Saxena, Vitthal Khatik and Ishu Agrawal

PART AND ASSEMBLY DRAWINGS: EXAMPLE III Feed Check Valve ᶲ32 6 43 74 4 VALVE (GM) ANUPAM SAXENA ME 251 LECTURE IV PART AND ASSEMBLY DRAWINGS: EXAMPLE III Prepared by Anupam Saxena, Vitthal Khatik and Ishu Agrawal

PART AND ASSEMBLY DRAWINGS: EXAMPLE III Feed Check Valve 32 M16 22 76 52 18 15 8 STUD (MS) M10 9 STUD (MS) ANUPAM SAXENA ME 251 LECTURE IV PART AND ASSEMBLY DRAWINGS: EXAMPLE III

PART AND ASSEMBLY DRAWINGS: EXAMPLE III Feed Check Valve M16 10 NUT (MS) M10 11 NUT (MS) ANUPAM SAXENA ME 251 LECTURE IV PART AND ASSEMBLY DRAWINGS: EXAMPLE III Prepared by Anupam Saxena, Vitthal Khatik and Ishu Agrawal

PART AND ASSEMBLY DRAWINGS: EXAMPLE III Feed Check Valve Careful of EXTRA lines when ASSEMBLING Make sure to number parts and prepare the BILL of material There may still be some mistakes… OBSERVE! ANUPAM SAXENA ME 251 LECTURE IV PART AND ASSEMBLY DRAWINGS: EXAMPLE III Prepared by Anupam Saxena, Vitthal Khatik and Ishu Agrawal

Tolerances Specification of Tolerances Dimensional Geometric Dimensional Tolerance – Amount by which a specified dimension is allowed to vary. Geometric Tolerance – These are applied to features.

Tolerances Specification of Dimensional Tolerances Unilateral Tolerance Bilateral Tolerance Unilateral Tolerance Dimension of part is permitted to vary only on one side of the basic size: 20 0.4 Bilateral Tolerance Dimension of part is permitted to vary both sides of the basic size: 20 -0.3 0.4

Tolerances Designation of Tolerance 25 H 7 f 6 IT Tolerance grade of hole 25 H 7 f 6 IT Tolerance grade of shaft Basic size of hole and shaft Fundamental deviation of hole Fundamental deviation of shaft

International Tolerance Grade (IT Grade) Group of tolerances which has the same relative level of accuracy IT 01 is the most precise and IT 16 is most coarse Tolerance value depends on basic size Measuring Tools Materials Fits Commercial manufacturing Grade IT5 IT6 IT7 IT8 IT9 IT10 IT11 IT12 IT13 IT14 IT15 IT16 Tol. 7i 10i 16i 25i 40i 64i 100i 160i 250i 400i 640i 1000i Slide Adapted from Prof. P. Venkitanarayanan

Machine drawing by K L Narayana, P kannaiah and V reddy

Tolerance grades for different machining processes

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