Mel110 Lab Sheets

7/28/2019 Mel110 Lab Sheets

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DEPARTMENT OF MECHANICAL ENGINEERING, IIT DELHI

MEL 110 LABORATORY 1 (to be done in CAGI Lab. Room: III 331) DURATION: 3 Hrs 50 Mi

Note: Missing dimensions may be suitably assumed.

Exercise 1:Visualize orthographic and isometric views of 3D models/objects:

Open Autodesk Inventor by double clicking its shortcut on desktop or by selecting it from program list.

1. Use Open command to open an existing inventor part file (all the part files have an extension of .ipt. ipt is theabbreviation for inventor part file).

2. Go to Public Documents>Autodesk>Inventor 2011>tutorial files>PivotBracket.ipt (or any other part file)and clickopen. The part file will be active now.3. Keep the cursor at any of the menu items for a while to see the details of operations that can be performed by using thatcommand.

4. Use the View cube displayed at the top right hand corner in the active area. Click the cube corners to snap the 3D modeto isometric views and click the faces for orthographic views. Click the Home button in the view cube to return to a

user-defined base view.

5. Use the Navigate command in the main View tab to zoom, pan, rotate (orbit) the 3D model. Click on the view facecommand and select any face of this model. Click on this face again. New tools appear on this face. Bring the cursor tothe edit sketch tool to view the details of this face.Navigate command can also be accessed from the right side of active

sheet

6. Close the active file.Exercise 2: Create a sketch with lines:

1. Click the projects command located in the launch panel and select the default project and clickdone. Launch panel ispart of the Get Startedtab.

2. Create a new part file. In the Get Startedtab, go tonew > Metric >standard (mm).ipt and clickOK. This will open thesketch mode with a default file name Part1 (you can later save this part with a different name. It will have an extension

.ipt). If the sketch mode is not activated, then select sketch 1 from the browser window which is located on the left side

below the main tab.

3. Select a working plane (XY, XZ or YZ plane) under origins tab from the browser window to create a 2D sketch or elseuse the default working plane.

4. Use the 2D sketch commands to create the following sketch using lines. Press esc button on the keyboard to exit out oany command.

5. In order to view the different axes, right click thex-axis inthe browser window and select visibility. The x-axis will be

visible now. Similarly do this for the remaining axes and/or

for all the planes.6. Add dimension to the sketch from the dimension command

located in the constrain command by clicking the line(that need to be dimensioned) and then dragging the mouse.

7. Select theFinish sketch command to exit the sketcher aftercompleting the sketch andclose the active file.

Exercise 3: Create a profile with tangencies:

1. Repeat steps 1 to 3 of exercise 2. To draw any construction feature: goto Sketch>Format>Construction.

2. Use the 2D sketch commands to create the following sketch using lines,circles and tangential arcs.

3. Select the show constraints command from the constraincommand located in the sketch panel of the sketch tab(or else click right button of mouse and activate show all constraints).

4. Add constrain from the constrain command located in the sketchpanel of the sketch tab.

5. Add dimension to the sketch from the dimension command locatedin the constrain command by clicking the line (that need to bedimensioned) and then dragging the mouse.

6. Select theFinish sketch command to exit the sketcher.7. Use the Extrude command to extrude the sketch as shown in the figure.8.close the active file.


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Exercise 4: Create a Drawing of a solid model:

1.Create a new drawing file. In the Get Startedtab, go tonew > Metric >ANSI(mm).idw and clickOK. This will open anew drawing with a default file name Drawing1 (you can later save this drawing with the same name as that of the part file

name or a different one. It will have an extension .dwg).2.In the Place Views tab, click Base. This will open a window of Drawing View. Open an existing part file

Documents>Autodesk>Inventor 2011>tutorial files>PivotBracket.ipt and select a suitable scale, orientation andstyle

and click OK.3.In thePlace Views tab, clickProjectedand move the mouse at the left, right, top or bottom side of the base view to obtain

the corresponding views and then click right mouse button and click create.

4.In the Annotate tab, clickDimension. Add dimension to the drawing view by clicking the line/feature (that need to bedimensioned) and then dragging the mouse to a suitable distance to place the dimension line.

5.Click right mouse button and select Done.Problem 1: Create the sketch shown in figure 1 as per the given dimensions. Use the Extrude command (extrusion 25 mm)

create a solid model of this sketch and obtain the orthographic projections. (1 marks)

Problem 2: Create the sketch shown in figure 2 as per the given dimensions. Use the Extrude command to create a solid model

this sketch and obtain the orthographic projections. (2 marks)

Problem 3: Create the sketch shown in figure 3 as per the given dimensions. Use the Revolve command (axis x-x) to create a somodel of this sketch and obtain the orthographic projections. (2 marks)

Fig 1Fig 2

x x


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Graphic Science MEL 110 LABORATORY 2 DURATION: 3 Hrs 50 Min. MARKS 10

NOTE: No drawing instruments like metric scale, compass, divider, drafter etc. are permitted

except Tracing sheet Pad with a graph paper, H & HB grade pencils and eraser.

Q1:- Write your name, entry number and group number using following (free hand lettering):

ABCDEFGHIJKLMNOPQRSTUVWXYZ

1234567890Take the height of letter/digit =5mm, Width of letter/digit =4mm (except width of letter I

which is 1 mm, forM andWwhich are 5 mm and for digit 1 which is 1 mm), Gap between line=

5mm, Gap between letters/digits, letter & comma, letter & full stop=1mm and Gap between

words=5mm.

Q2:- Draw the symbols for 1st

and 3rd

angle projection systems.

Q3:- Sketch the followinglines used for(a)Hidden Edges line (b) Centre line(c) Construction line (d) Outline(e) Dimension line

Q4:-Draw the orthographic projections, indicating dimensions, of the following points, about

common X-Y line. Mention the projection system (I, II, III or IV angle).

(a)40 mm above Horizontal Plane and 50 mm in front of Vertical Plane.(b)70 mm above Horizontal Plane and 30 mm behind Vertical Plane.(c)50 mm below Horizontal Plane and 60 mm behind Vertical Plane.(d)40 mm below Horizontal Plane and 50 mm in front of Vertical Plane.

Q5:- Draw two orthographic projections of following (Choose your own dimension if not given)

(a)a horizontal line 40 mm from top plane & at an angle of 600 to Vertical plane.(b)a vertical plane ABC at a distance of 5cm from frontal plane.(c)a horizontal plane ABC at a distance of 5cm from top plane(d)an inclined plane perpendicular to top plane.(e)an inclined plane perpendicular to front plane.(f) two non intersecting oblique lines.(g)two non intersecting parallel lines which are oblique to the principal plane.

Q6:- Assume height as 70mm, diameter as 60mm and side as 50mm for following (no need todimension the views):

a) Sketch two necessary orthographic views of a Square prism.b) Sketch two necessary orthographic views of a Square pyramid.c) Sketch two necessary orthographic views of a Right circular cone.

Marks(0.7x3)=2.1

Marks0.5x7=3.5

Marks(0.25x4)=1

Marks1

Marks1

Marks0.28x5=1.4


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DEPARTMENT OF MECHANICAL ENGINEERING, IIT DELHIGraphic Science MEL 110 LABORATORY 3 DURATION: 3 Hrs 50 Min.NOTE: No drawing instruments like metric scale, compass, divider, drafter etc. are permitted except Tracing sheet

Pad with a graph paper, HB & H pencils and eraser. Note: Choose a suitable scale only if the required views

cant be accommodated on a single tracing sheet. X indicates the front viewing direction.

Q1 & 2:- Sketch three orthographic views of the objects (fig 1 & fig 2) in I angle projection and dimension theviews according to aligned system of dimensioning.

Q3, 4, 5 & 6:- Sketch the orthographic views of the objects along with marking of the corresponding surfaces in

front view, top view and side view in III angle projection and dimension the views according to the

unidirectional system of dimensioning (figures 3, 4 & 5).

HELP:

Unidirectional system: Place all dimensionvalues and notes horizontally, so that those canbe read from left to right.

Aligned system: Place all dimension valuesand notes vertically or horizontally, dependingon the placement of the feature to bedimnesioned.

Fig 1 Fig 2

Fig 3 Fig 4

Fig 5

3marks

1.5 marks1.5marks

2.25marks1.75marks

4


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DEPARTMENT OF MECHANICAL ENGINEERING, IIT DELHIGraphic Science MEL 110 LABORATORY 4 DURATION: 3Hrs 50 Min.NOTE: No drawing instruments like metric scale, compass, divider, drafter etc. are permitted

except Tracing sheet Pad with a graph paper, isometric sheet, HB & H grade pencils and eraser.

Q1:-A vertical cylinder (diameter=50mm, height=50mm) is centrally placed on top of a hexagonal prism

of base edge=30mm and height=50mm. Two base edges of hexagonal prism are perpendicular to vertical

plane. Draw isometric drawing of the combination. (1 mark)

Q2:- A square pyramid rests centrally over a cylindrical block, which is resting centrally on top of a

Square block (fig 1). Make isometric drawing of this combination. (1 mark)

Q3:- Make isometric drawing of the solids shown in orthographic projections (fig 2, 3, 4, and 5).

Fig 1

Fig 4 (III angle projection)Fig 3 (I angle projection)

Fig 2 (I angle projection)

Fig 5 (III angle projection)

1.25marks

1.75marks

3marks

2marks


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MEL 110Graphic Science LABORATORY 5 DURATION: 3 Hrs 50 Min.

Q1:- A circular lamina of 50 mm diameter is perpendicular to the vertical plane and inclined to the horizontal

plane at 30. Draw its three orthographic views.(1 mark)

Q2:-Draw isometric drawings of the objects shown by two orthographic views in fig 1 & 2. (1.5+1.5 marks)

Q3:- Draw oblique projections of the objects shown by two orthographic views in fig 3 & 4. (1.75+1.75

marks)

Q4:- A pentagonal pyramid, side of base 35mm and height 70mm has one of its slant(triangular)) faces on theH.P. and the edge of base contained by the slant edge makes an angle 30 to the V.P. Draw its projection.(2.5

marks)

Fig 4

Fig 3

Fig 2Fig 1


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DEPARTMENT OF MECHANICAL ENGINEERING, IIT DELHIMEL 110 Graphic Science LABORATORY 6 DURATION: 3 Hrs 50 Min.

NOTE: Draw the specified views with dimensions and proper notations. Use III angle projection.

Q1: A thin regular pentagonal plate is of 30mm edge and thickness 5 mm. One edge of the lower pentagon is

in horizontal plane and perpendicular to the vertical plane, while farthest corner of lower pentagon from

this edge is 30mm above the horizontal plane. Draw three necessary orthographic projections of the

plate. (2.0 marks)

Q2: Sectional front view & top view without section (fig.1). (1.25 marks)Q3: Front view (without section) and Sectional side view (fig 2). (1.75 marks)

Q4: Sectional front view & top view without section (fig 3). (2.5 marks)

Q5: Half Sectional front view & half sectional side view (fig 4). (2. 5 marks)

Fig 3

Fig 2

Fig 4

X

Fig 1

160

XX

20


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MEL 110 ULABORATORY 7 (to be done in CAGI Lab. Room: III 331)U DURATION: 3 Hrs 50 Min.

Note: If any dimensions are missing they should be suitably assumed. All the dimensions are in mm.

UProblem 1:UMake solid models of the objects shown in figures 1, 2 and 3 and obtain the orthographic projections. (1+2+2 mark

UProblem 2:U Make solid models of the figures 4, 5 and 6 and obtain their isometric views. (1+2+2 marks)

Fig 5 Fig 6

Fig 3

Fig 2Fig 1

Fig 4 All three orthographic projections are identical

80


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Graphic Science MEL 110 LABORATORY 8 DURATION: 3 Hrs 50 Min.

Note: 10% marks will be deducted for improper line work.

Q1:Find the piercing point and the true angle of inclination of the line P(20,10,0), Q(10,25,40) with the

plane A( 10, 30, 0), B(30, 20, 40), C(10, 0, 40). (Marks: 2.0)

Figure 1: Coordinate System for Q1

Figure 2: Coordinate System for Q1Q2:A light house has a helical staircase running inside it. The light house has 3 stories and the diameter

of the building is 10 meters. Each story is 5 meters high. There are 2 windows along the staircase, one at a

height of 8.3 meters and the other at 12.7 meters. From the first window a boat is visible at an angle ofdepression of 70 located radially from the lighthouse; from the second window another boat is visible at

an angle of depression of 75 also located radially. Find the distance between the two boats. (Marks: 3.0)

Q3:Two electric lamp posts, each 11 m high, produce shadows OA and OB of lengths 8m and 4m

respectively on the ground, of a 6m high pole, OP. The angle between the shadows is 70. Determine thedistance between the bulbs. Also determine the distance between the pole top and each bulb. (Marks: 2.0)

Q4:-A space frame supporting some load is shown in Figure 3. OA, OB and OC are the bars forming theframe. Take the front view as shown in the figure 3.

a) Find true lengths of the frame members OA and OC. (Marks: 1.5)b) Find the true angle between planes OAC and OBC. (Marks: 1.5)

Figure 3 (All dimensions in mm )

Z

Y


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Note: 10% marks will be deducted for improper line work. If not mentioned, use III angle

projection.

Q No. 1:- Two fixed points are 100mm apart. A point P moves in such a way that the sum of its

distances from the two fixed points is always constant and equal to 150mm. Trace the path of the

point and name the curve. (1.0 MARK)

Q No. 2:- Construct an equilateral triangle, regular hexagon and regular heptagon on a common

base of 45 mm side (all in one figure). (1.5 MARKS)

Q No. 3:- An object is cut by a plane as shown in figure 1. Draw the top view without section and

the front view with section. (2 MARKS)

Q No. 4:- A heptagon prism with a base side of 45mm and height 90mm has its axis perpendicular to

the ground. One of the sides of the base is inclined at 30 to the vertical plane. A section plane

inclined at 70 to the ground and perpendicular to the vertical plane and passing through the midpoint

of the axis cuts the prism. Draw TV and FV without section and the sectional side view. ( 2.5MARKS)

Q No. 5:- A cone with a base diameter of 70mm and a height of 80mm is placed coaxially on a

circular disc with a diameter of 120 mm and thickness of 35mm. The cutting plane bisects the cone

axis and passes tangential to the base circle of the cone. Draw the sectional top and front view of

this combination. Draw true shape of the sectioned object.

(3 MARKS)


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Graphic Science MEL 110 LABORATORY 12 DURATION: 3 Hrs 50 Min.Note: 10% marks will be deducted for improper line work. Use III angle projection and assume any missing

dimensions suitably.

Q No.1 A square prism with a base side of 50mm and a height of 80mm stands on the ground with

a side of base inclined at 30 to the vertical plane. It has a cylindrical hole of 55 mm diameter

drilled through it. The center line of the hole is parallel to both the Horizontal Plane and the Vertical

Plane and is 5mm away from center of the axis of the prism towards the Vertical plane. Draw the

projections of the prism showing the curves of intersection. (3 marks)

Q No.2 Draw the curves of intersection of the hexagonal and triangular prism as shown in figure 1.(2 marks)

Q No.3 Draw the curves of intersection of the hemisphere intersected by a square prism as shown in

figure 2. The axis of the prism is 10 mm due south-east of the centre of the hemisphere. Assume a

suitable height of the prism.(2 marks)

Q No.4Draw the curves of intersection, in the top and the front view, of the cone intersected by a

cylinder as shown in figure 3. (Use the PAV in which the cylinder is seen as a circle). Also, draw

the auxiliary view of the solid in which the cylinder is visible as a circle. (3 Marks)

Figure 1Figure 2


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Note: 10% marks will be deducted for improper line work.

Q No. 1:- A hexagonal prism, having base with a 30mm side and height 70mm is resting on the

ground with a side of the base inclined at 45 to the vertical plane. It is cut by a plane inclined at

45 with the ground and passing through a point 15mm below the top end of the axis. Obtain thedevelopment of the lateral surface of the prism. (1.5 marks)+.5

Q No. 2:- Draw the development of an oblique cone cut by a plane (Figure 1). (2 marks)+0.5

Q No. 3:- A vertical solid cylindrical pipe of diameter 80mm has a solid cap at its upper end which

is part of a hemisphere of diameter 100mm. Draw the quarter development of the cap. (2 marks)

Q No. 4:- Figure 2 (on page 2) shows the development of a cut pentagonal pyramid. Cut the figure

and make its surface model. Using that draw the Front View (choose appropriate front plane) and

Side View in third angle projection. (2.25 marks)+.75

Q No. 5:- Figure 3 (on page 2) shows the development of a transition piece. Cut the figure and

make its surface model. Using that draw the Front View (choose appropriate front plane) and top

View in third angle projection. (2.25 marks)1.75\

Figure 1


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OA = OB

AB = BC

CD = 22m

DG = 32m

OC = OL

CL = LM

m, DE = 1

m, FG = 3

= OM = O

= MN = 6

mm

m

N = 130 m

mm

Figure 2

Figure 3


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MEL 110 LABORATORY 14 (to be done in CAGI Lab. Room: III 331) DURATION: 3 Hrs 50 M

Note: If any dimensions are missing they should be suitably assumed.

Problem 1: Obtain the sectional view of the

solid model shown in figure 1. Identify the

error in the sectional view generated usingAutodesk Inventor. (1.5 marks)

Problem 2: The orthographic views of an

object are given in figure 2. Make the solidmodel of the object and obtain the necessary

(auxiliary & orthographic) views so as to

represent the true shapes of all the features.

(2 marks)

Problem 3: A cone with base diameter

70mm and half angle 20 rests on the

horizontal plane. It is intersected by anothercone with base radius 20mm and half angle

10. The base of the second cone is parallel

to the side plane and the axes of the conesintersect at a height of 35mm from the base

of the first cone. Also, the base of the

second cone is at a distance of 40mm from

the axis of the first cone. Assuming anymissing dimensions, make a solid model of

the solid of intersection and obtain the

projections showing the curves ofintersection. (2 marks)

Problem 4: A square prism with a base sideof 40mm and a height of 70mm stands on

the ground with a side of base inclined at30 to the vertical plane. It is completely

penetrated by a cylinder having 40mmdiameter and 90mm length. The axis of the

cylinder is parallel to both the horizontal

and the vertical plane and bisects the axis ofthe prism. Make a solid model of the solid

of intersection Obtain the projections

showing the curves of intersection.

(2 marks)

Problem 5: A picture frame 2m wide and

2m high is to be fixed on a wall railing bytwo straight wires attached to the topcorners. The frame is to make an angle of

40 with the wall and the wires are to be

fixed to a hook on the wall on the center lineof the frame and 1.5 m above the railing.

Find the length of the wires and the angle

between them. (2.5 marks)

Figure 2

Figure 1