computer aided solid modelling

Table of Contents

Contents Leaf No.

Introduction 1

Literature Review 1

PDS 1

Method 1

Part Design 2

2D Sketch

Trim

Extend

Extrude

Fillet 3

Hole 4

Circular Pattern

Loft

Work Planes 5

Ribs

Sweep 6

Coil

Thread

Assembly 6

Mate or Flush 7

Presentation 8

Animate 9

2D Projections 9

Conclusion 12

References 13

2D Presentations blue print 14

1

Introduction:

Every successful product that is in world market has to go on basic generation of concept designing. In the 19th Century

and early 20th the engineers used to the sets of 2D drafters to draw a projection of their ideal drawing. Things have

changed in the modern era. Much of the anticipated products that are launched have to go under the rigorous development

in the designing software’s. One of this most widely used software is Inventor, from Auto Desk. The report is on a kid Kick

scooter designed on the inventor. The designs are made on the 2D sketch. There have been multiple tools used to get the

product live and robust in look. The multiple applications include the extrusion, filleting the sharp edges, using and moving

the profile plane, mirroring the same products, projections, using a swap and loop to create typical complicated parts.

Every part has been separately designed and final product has been assembled. The product has been explained in the 2D

charts with ballooning every minute detail highlighted along with the presentation and the explosion video.

By the end, the report shall give us a brief idea about the generation of complex designs, assembling and the constraints of

designing.

Literature Review:

Inventor offers a range of the library functions and tools to design produce and animate

the product. Whilst the user can change the preference of the materials and structural

appearance it offers one click function to complete the function.

The Kids' Kick Scooter is one such product designed by the user. It is a playful kit for the

children especially for the age group 7 -13 ages of years. The user has made the product

out of assembling 18 small parts excluding the fasteners and the rib-bets. The user has

provided PDS to explain the product's specifications.

Figure 0 (Right) : Kids Kick Scooter

PDS -

Features Dimensions.

Detailed Specification Ages: 3-5

Wheel Size: 120mm

Wheel Material: Hard Rubber (PU)

Storage: TBar is fold able

Weight: 44lbs

Length/width of scooter 21" x 4.5"

Length/width of standing

deck

12 x 4.5"

The product has an age restriction of 5 years of above. For the ease of the use and manufacture the user has opted to use

the combination of Aluminium, Stainless steel, Plastic covers and use of rubber as the raw material for the product. The

product can be easily manufactured by a CNC machine and using standard process of manufacture – machining, drilling,

facing and injection moulding.

Method:

The whole product is assembled out of 18 important parts and rounding of roughly 22 small parts together. The vivid

steps involved are described with their images and the steps involved in it.

1. Part Designs 2. Assembly or Parts Assembly 3. Presentation 4. Animate

5. 2D presentation and projections

2

Part Work PlanesDesigns:

2d Sketch- Every design starts with the two sketches. The user needs to select one of the planes out of the X,Y& Z. With

basic geometrical application the sketch is completed as drawn on sheet. These include, line, arc (multiple options : arc

with three points, arc with two points and many more), rectangle, circle with centre and etc. All the sketches were fully

constrained as shown in the figure 1.

Figure 1 – Shows the 2D Sketch of the neck lock of the scooter

Trim – An important aspect of the 2D drawing is the option of trim. This allows to delete the extended sketches that is not

needed

Extend – The option allows the user to connect by extending the area of the sketch up to the desired point.

Extrude – This allows giving a solid shape to the 2D figure sketched earlier in the step. The dimensions are fed along with

the option of symmetric/ throughout the length. Demonstrated on Figure 2,3 & 4.

Figure 2: Extrude of the 2D sketch

Figure 3: Extrude to create hollow

3

Figure 4: Completed extrusion.

Fillet – To smoother the edges the fillet option is used. A variable fillet can be used on the specified edge and length. The

user can even feed the intermediate points to get variable radius. The image below shows filleting

Figure 5: Filleting of the sharp corner of the design

4

Hole – It is a 3D application to create a hole pattern as per the user fed. Generally used for a drill and other factor

applications.

Figure 6:

Creating a hole

Circular Pattern – It is the creation of the solid feature. The user needs to feed the angle and dimension. Figure 7.

Figure 7: Creating a circular pattern.

Loft – The loft application gives the user the freedom to draw on two different work planes and merge them together. It

has variable sketched residing on two different planes can used together in this function shown in figure 8

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Figure 8: Creating a circular pattern.

Work Planes – Construction of the sketches on complex or beyond origin needs to assign an artificial plane as reference

called the work planes as shown in figure 9.

Figure 9: Using an artificial work plane.

Ribs – Ribs are the thin wall support shapes which can be created on the open or closed profile. Thickness of ribs planar to

the sketch can be fed by the user. The constructed thickness can be specified and projected. Illustrated on figure 10.

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Figure 10: Illustrating the use of ribs to generate lock structure.

Sweep - Construction of the sweep solid feature requires two sketches a profile sketch and a path sketch to specify the

path of the sweep operation. In a 3D sweep feature, the path is three dimensional.

Coil- The coil offers the user a a helical spring like structural feature. The specific parameters of the coils starting and ends

can be fed.

Thread- This allows the user, to simulate the appearance of threads on the curved surfaces of either a cylinder or a hole.

The only important parameter is that the dimensions and the diameter should match. Displayed on figure 11.

Figure 11: Below demonstrating the thread creation in inventor

Assembly:

Assembling products is quiet simple operation. These allow to constraint the user’s product and look like live. To assemble

the user needs to open the inventor and change the operation to standard (mm).iam. To place the parts, it is essential to

click on place and have all the standard parts in the same work place. This eases the use of operation and allows user to

quickly sort the design assemble.

7

Clicking the parts selects them and places them. In a typical modelling process, some component designs are known and

some standard components are used. Create the designs to meet specific objectives. Refer figure 12 below

Figure 12: Displaying how to use the option of assembly

Assembly constraints establish the orientation of the components in the assembly and simulate mechanical relationships

between components. It can be done in the following ways:

Mating two planes.

Specify that cylindrical features on two parts remain concentric.

Constrain a spherical face on one component to remain tangent to a planar face on another component.

Each time the user updates the assembly, the assembly constraints are enforced.

Mate or Flush - when using origin planes to position a part, user needs to know that the final constraint will need to be

either a mate or a flush. It is important to observe the selection vector previews to determine if user wants arrows

pointing towards each other (mate) or pointing in the same direction (flush).

8

Step 1: Select the products and click on constraint. The user decides to phase the constraints first (Figure 13)

Figure 13: Using constrain with faces.

Step 2: As soon as the faces are constrained, the user feeds to align it in to axis.

Step 3: The scooter handle with the side guards are ready on design. (Refer figure 14)

Figure 14: Using constraint along with Axis.

Presentation: (Refer Figure 15)

User can create a presentation document using the default template or a custom template. Presentation templates set the

file properties for assembly presentations.

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Figure 15: Use of the presentation in Inventor.

Step 1 Click on your Inventor Icon, Click on New, and Click on Presentation.

Step 2 Click on Create View, Open the folder Icon, and Find your Assemble file.

Step 3 Click Tweak Components.

Step 4 Select your IPT or Sub-assemblies from your browser window.

Step 5 Click on the surface of the part you want to move and place it.

Animate: (Figure 16)

Animation is the final stage of the design.

By clicking animation the assembly of

each component can be watched. Each

sequence is shown in a list. The camera

angles can be changed and alter a

sequence view which enables to focus on

a particular part being assembled.

Figure 16: Use of animation with camera

angles.

2D Projections:

It include basic views, dimensions, part lists, balloons, hole table information, and so on. The following image shows an

automatically generated 2-D drawing. (Refer Figure 17)

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Figure 17: Use of the 2D projections.

The User can create drawings for all the product part models. The user can configure the drawing setting for it, including

the Sheet Format, Dimension Style, Centre Mark, and so on. You can export Drawing groups and their drawing settings to

other mould Design documents.

If automatically generated drawing documents are unsatisfactory even the user can modify drawings manually in the

Inventor Drawing environment.

Procedures to create a 2D projected views :

1. It needs to be confirmed if the version of the Inventor has the 2D template. The user needs to open the inventor in a

drawing template ie. .'.idw'.

2. The user should follow clicking the option on the toolbar – base and select the component from the specific folder. (refer

figure 18.

Figure 18: How to operate the function of 2D templete

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3. The user can select the product according to choice and place either as an orthogonal or isometric projection. The figure

below shows how to proceed in placing the drawing. Refer figure 19

Figure 19: Proper use of the projections.

4. Proper scaling and orientation can also be to change the zoom effect of the product if it is too small. The figure shows

below. Refer figure 21.

Figure 21: Use of the orientation.

5. To start with the 2D projections, it is preferable to start with the main explosion figure. The user can use the ballooning

to list the details of the products. As shown in the figure. Refer figure 22.

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Figure 22:

Use of the ballooning.

6. Subsequently the user can place the right or left view of the projection and then insert the dimensions to show the

measurements of the part products. The figure below shows the dimensions. Refer figure 23.

Figure 23: Use of the dimensioning.

7. Finally when the labelling is done the details are documented.

Conclusion:

With the study of the Inventor from Auto desk it is well clear that a product goes on vivid stages of designs where it is

presented tested and formulated on the computer. The module Computer aided solid designing helps the user to

understand the important aspects of designing, making 2D constrained drawings, extrusion, filleting, looping, creating

complex structures like ribs. No soon once the 2D drawing is made, the product can be illustrated with the 3D features of

animating and exploding the part view.

In a small line to brief up, designing is a important aspect of our lifestyle products without which an accurate design is

really hard to generate.

13

References:

Lecturer Dilen, 2014. Vle. [Online] Available at: http://vle.anglia.ac.uk/modules/2013/MOD002610/SEM2-A-1/Pages/Home3.aspx [Accessed 3 April 2014].

Auto Desk, 2014. [Online] Available at: http://help.autodesk.com/view/INVNTOR/2014/ENU/ [Accessed 4th April 2014] Anon., n.d. IIT Delhi. [Online] Available at: http://web.iitd.ac.in/~hirani/Inventor%20Notes.pdf [Accessed 4 April 2014].

Parts List

PART NUMBERQTYITEM

kick scooter body11

kick scooter12

kick scooter frount part two13

wheel lock14

kick scooter brake15

tyre26

fastener27

Flip inside Handle28

handle corner cover29

handle210

Lock 1 ROD111

Lock 1112

ROD IN LOCK113

main handle114

neck joint115

screw

116

NF E 25-109 - M6 x 40117

NF E 25-109 - M6 x 50118

NF E 25-109 - M4 x 40119

ANSI B18.3 - 10-24 UNC - 1.75120

BS EN 24 036 - M6221

BS EN 24 036 - M4122

ISO 4036 - M4123

PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT

PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCTP

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PROJECTION

ARU

Engineering and the Built

Environment

TITLE:

DESCRIPTION DATE:

SCALE MATERIAL DRAWN BY

All dimensions in mm.

DRAWING No.ISSUE

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Kids Kick Scooter

0.17:1 1227201

1Kick Scooter Explosion

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Base Plate

Base of kick scooter

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Neck Joint

Kick scooter T bar joint

2:4

Stainless Steel

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radius is

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Neck Joint fastener

Fastener 4:1 Aluminium

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Holds T bar 1:1

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Neck T Bar lock

Lock near the neck of Tbar

1.5:1Aluminium

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