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  • 7/28/2019 Mechanical Drafting Lab Manual _DME301

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    SCHOOL OF DILOMA STUDIES, RK. University, RAJKOT

    MECHANICAL DRAFTING.

    LABORATORY MANUAL

    MECHANICAL DRFTING

    (DME201)

    PREPAIRED BY

    SHIRAJ R.S.

    MECHANICAL DEPARTMENT

    SCHOOL OF DIPLOMA STUDIES,

    R.K. UNIVERSITY

    KASTURBADHAM, RAJKOT-360020

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    SCHOOL OF DILOMA STUDIES, RK. University, RAJKOT

    MECHANICAL DRAFTING.

    SHEET No.-1 MULTIVIEW PROJECTION

    Que. Draw following views of the pictorial drawing given in figure using first

    Angle projection and give dimensions according to unidirectional method.1. Front view, 2. Top view, 3. Bottom view, 4. Left hand side view

    5. Left hand side view 6.rear view.

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    SCHOOL OF DILOMA STUDIES, RK. University, RAJKOT

    MECHANICAL DRAFTING.

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    SCHOOL OF DILOMA STUDIES, RK. University, RAJKOT

    MECHANICAL DRAFTING.

    SHEET No.-2 PROJECTION OF SOLIDS

    Que.-1 A Square Pyramid of base side 30 mm and Axis 80 mm long is lying onH.P. Such that its base sides are equally (45) inclined to V.P. and one

    of its slant edge is perpendicular to H.P. draw its Projections.

    Que.-2 A Cylinder 40 mm diameter and 50 mm axis is resting on one point of a

    base circle on H.P. while its axis makes 450 with H.P. and plane of the

    axis 350 with V.P. Draw Projections.

    Que.-3 A Regular hexagonal Pyramid, side of base 35 mm and height 70 mm is

    resting on one of its triangular faces on the H.P. and the edge of base

    contained by that triangular face make an angle of 30 with V.P. Draw

    its Projections.

    Que.-4 Draw the Projections of a cone having base diameter 50 mm and axis 60

    mm long, when it is resting on the H.P. on a Point on its base circle in

    such way that one of its generator to the H.P. and the plan of axis makes

    an angle of 45 with V.P.

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    SCHOOL OF DILOMA STUDIES, RK. University, RAJKOT

    MECHANICAL DRAFTING.

    SHEET No.-3 SECTIONS OF SOLIDS

    Que.-1 A Cylinder of 50 mm base diameter and 80 mm long axis is standing on

    the H.P. on its base. A section plane which is perpendicular to V.P. and

    inclined at 45 H.P. is bisecting the axis of the cylinder. Draw the front

    view, sectional top view and true shape of Section.

    Que.-2 A Cone having base diameter 60 mm and axis 80 mm long is standing on

    its circular base on the H.P. A section plane making an angle of 45 with

    the H.P. and passing the midpoint of axis cutting this cone. Draw the front

    view, sectional top view and true shape of section.

    Que.-3 A hexagonal Pyramid 30 mm base side and height 70 mm long axis is

    resting on its triangular faces on the H.P. Its axis is parallel to V.P. A

    horizontal cutting plane bisects the axis of Pyramid. Draw sectional top

    view and true shape of the section.

    Que.-4 A cone 50 mm diameter and axis 60 mm long is resting on the H.P. on its

    base. A Vertical cutting plane inclined at 60 to V.P. and perpendicular to

    H.P. cuts this cone 7 mm away from its axis. Draw sectional front view

    and true shape of the section.

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    SHEET No.-4 D

    Que. 1 Fig-A shows a v

    surface develop

    Que.2 Fig -B show the

    as shown. Draw

    Fig.-A

    Que.3 Fig -C show view

    .

    Que.4 Fig-D shows a vie

    SCHOOL OF DILOMA STUDIES, RK. Univers

    MECHANICAL DRAFTI

    VELOPMENT OF SURFACES

    iew of hexagonal prism, side of base 30 mm. D

    ent of part-A.

    part of cone and part of cylinder joined with

    the development of lateral surfaces A and B.

    Fig.-B

    f an object, draw development of the surface o

    if cylinder. Draw the surface development of

    ty, RAJKOT

    G.

    aw

    ach other

    f part A

    part -P.

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    Fig.-C

    SCHOOL OF DILOMA STUDIES, RK. Univers

    MECHANICAL DRAFTI

    Fig.-D

    ty, RAJKOT

    G.

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    SCHOOL OF DILOMA STUDIES, RK. University, RAJKOT

    MECHANICAL DRAFTING.

    SHEET No.-5 INTERSECTION OF SOLIDS

    Que.1 A square prism 30 mm base sides and 70 mm axis is completely penetrated

    by another square prism of 25 mm sides and 70 mm axis, horizontally. Both

    axis intersects & bisects each other at right angle. All faces of prisms are

    equally inclined to V.P. Axes of both are parallel to V.P. Draw Projections

    showing curves of intersections.

    Que.2 A Vertical Cone having base diameter 75 mm and axis 110 mm long is

    resting on the H.P. on its base. A cylinder of 40 mm diameter, intersects the

    axis of the cone at right angle and 27 mm above the base. The axis of the

    cylinder is parallel to both H.P. and V.P. Draw the projections with showing

    lines of intersections.

    Que.3 A vertical cylinder of 50 mm base diameter is penetrated by another cylinderof same dimensions. The axis of the penetrating cylinder is parallel to H.P.

    and V.P. as well as 7 mm away from the axis of vertical cylinder. Draw

    their projections showing the curves of intersection.

    Que.4 A square vertical prism having 50 mm base sides is penetrated by another

    horizontal prism of 30 mm sides. The axis of the penetrating solid is 7 mm

    in front of the vertical Prism. If the rectangular faces of both the prism are

    equally inclined to V.P. then draw Projection showing the lines of

    intersection.

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    SHEET No.-6

    A.) Draw a details of1. Cotter joint with2. Knuckle joint in f

    SCHOOL OF DILOMA STUDIES, RK. Univers

    MECHANICAL DRAFTI

    DETAILS & ASSEMBLY DRA

    iven assembly:

    leeve in fig.-aig.-b

    FIG.-b

    ty, RAJKOT

    G.

    ING

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    SCHOOL OF DILOMA STUDIES, RK. University, RAJKOT

    MECHANICAL DRAFTING.

    SHEET No.-7 LIMITS AND FITS

    QUE.-1 In a drawing fit is shown 60H7g6 .Draw fit diagram and find.

    1. Max. & Min. limits for hole.2. Max. & Min. limits for shaft.3. Tolerance for shaft & hole.4. Max. & Min. clearance, if any.5. Max. & Min. interference, if any.6. Type of fit.7. Reason for type of fit.

    For 60 mm diameter deviations in microns are

    QUE.-2 In a drawing fit is designated as 120H6e8 .Draw fit diagram and find1. Max. & Min. limits for hole.2. Max. & Min. limits for shaft.3. Tolerance for shaft & hole.4. Type of fit.5. Reason for type of fit.

    Deviation in microns for 120 mm diameter as per IS-919 is as under

    QUE.-3 A 25 mm diameter shaft & hole pair is designated as H8d9. Findtolerance and allowance limit using information given bellow. Give your

    opinion the applicability of this type of fit.

    QUE.-4 The following information is for a hole & shaft. Hole 50+0.05

    -0.00 mm

    & shaft 50

    -0.05

    -0.05 mm. Draw free hand fit diagram for this pair &answer the following Question by computation.

    1. Max. & Min. limit for Hole & Shaft.2. Tolerance for Hole & Shaft.3. Max. & Min. clearance, if any4. Type of fit.

    Upper Lower

    H7 +25 +00

    g6 -09 -25

    Upper Lower

    H6 +22 +00

    e8 -78 -128

    Hole H8 Shaft d9

    Go 0.00 -0.065

    Not Go 0.033 -0.117

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    SCHOOL OF DILOMA STUDIES, RK. University, RAJKOT

    MECHANICAL DRAFTING.

    SHEET No.-8 WELDING, MACHINING SYMBOLS &

    PIPING DRAWING

    1. SYMBOL OF CONVETION FOR WELDING. (Page No.-207, GTUM.D. Text Book By S.V.Gosai)

    2. MACHINING SYMBOLS. (Page No.-217, GTU M.D. Text Book ByS.V.Gosai)

    3. STANDARD SYMBOLS FOR FLANGED & THREADED PIPESFITTING & VALVES. (Page No.-223, GTU M.D. Text Book By

    S.V.Gosai)

    4. SYMBOL & LAYOUT OF PIPING. (Page No.-221, GTU M.D. TextBook By S.V.Gosai)