Mark Wilson Project 06

8/14/2019 Mark Wilson Project 06

1/13

Project 06

[October 27]

[2009]MAE377

Mark Wilson

#34382952


2/13

2 | P a g e

Contents

1 Introduction .............................................................................................................................................................. 3

2 Problem definition / Problem statement ....................................................................................................... 3

3 Results ......................................................................................................................................................................... 43.1 Table 1 .................................................................................................................................................................................. 4

3.2 Table 2 .................................................................................................................................................................................. 5

3.3 Phase I Questions ............................................................................................................................................................. 6

3.4 Part A .................................................................................................................................................................................... 7

3.5 Part B .................................................................................................................................................................................... 9

3.6 Part C ................................................................................................................................................................................... 10

3.7 Part D .................................................................................................................................................................................. 11

3.8 Part E ................................................................................................................................................................................... 12

4 Discussion ................................................................................................................................................................ 13

5 Conclusion ............................................................................................................................................................... 13

6 References ............................................................................................................................................................... 13


3/13

3 | P a g e

1 IntroductionBeing able to identify flaws and proposing new designs to solve the flaws are necessary skills that

engineers must attain. Much of the engineering in todays world is the modification of old designs and

concepts to better their qualities.

2 Problem definition / Problem statementPhase I of project 06 consisted of identifying the flaws in the dimensions of the 2-Dimensional drawing

of the adjustable wrench. Once all of the flaws were identified we had to include a way to re-design each flaw

with a description and a sketch of the new design with dimensions. Phase II of project 06 consisted of re-

designing the wrench using Pro/ Engineer to create CAD models of all the parts and then creating a working

assembly of the new wrench. Using new dimensions to replace the errors found, shown in figure 1, a 2-

Dimensional drawing was made to highlight the changes in dimensions.


4/13

4 | P a g e

3 Results3.1 Table 1

Table 1 shows the errors that were found using the given dimensions, these were found by modeling the parts

using the old dimensions and also using simple calculations.

Problem Description

1 The pin is not long enough to fit in the entirety of the pin housing; it comes to be about 1/16 inch short.

2Pin diameter and the screw hole diameter are the same. In order for the screw to be able to rotate around

the pin there needs to be a difference in the diameters.

3 The teeth located on the handle and the screw threads overlap.

4The opening in the housing where the teeth are supposed to extrude through does not provide enough

room for the entirety of the teeth to do so.

Figure 1: Table 1 lists the problem descriptions associated with the adjustable wrench.


5/13

5 | P a g e

3.2 Table 2Table 2 displays sketches of the re-designed dimensions and also a description to further explain how each design

flaw was fixed.

Re-design Sketch Re-design Description

1

Make the smooth part of the pin

0.0625 inches longer so it fits fully

inside the entirety of the hole.

2

Change the hole diameter in the

screw to 0.2 inches so the screw has

enough room to rotate around the

pin.

3

Make the size of the housing bigger so

that the screw is a little farther away

from the opening of the house but stil

is fully enclosed by the housing.

4

Make the walls inside the housing

lower so that they are the same size

as the width of the handle.

Figure 2: Table 2 lists the re-design sketches and descriptions of the adjustable wrench.


6/13

6 | P a g e

3.3 Phase I Questions


7/13

7 | P a g e

3.4 Part APart A consisted of modeling the different parts of the wrench using the new dimensions discussed in Table 2.

Below are the images of the re-designed CAD models of the handle, housing, pin and screw.

(a) (b)Figure 3 (a) The CAD model of the handle; and (b) the same model at a different view.

(c) (d)Figure 3 (c) The CAD model of the housing; and (d) the same model at a different view.


8/13

8 | P a g e

(e) (f)Figure 3 (e) The CAD model of the pin; and (f) the same model at a different view.

(g) (h)Figure 3 (g) The CAD model of the screw; and (h) the same model at a different view.


9/13

9 | P a g e

3.5 Part BPart B consisted of creating a 2-Dimensional drawing of the parts associated with wrench. Located below is the

drawing with all the necessary dimensions and fittings.

(a)

Figure 4(a) The 2-Dimensional drawing of the wrench assembly


10/13

10 | P a g e

3.6 Part CPart C consisted of using the parts modeled from Part A to complete an assembly of the wrench to illustrate the

fitting of all the parts. Located below are the exploded and unexploded views of the wrench assembly.

(a) (b)Figure 5 (a) The CAD assembly of the wrench; and (b) the same CAD model at a different view.

(c) (d)Figure 5 (c) The exploded CAD assembly of the wrench; and (d) the same exploded CAD model at a different view.


11/13

11 | P a g e

3.7 Part DPart D consisted of creating a rendered view of the wrench and assigning different materials, textures, and colors

to each part. The handle is cast iron, the housing is brushed iron, and the pin and screw are metal. Shown below is the

completed render of the wrench.

(a)Figure 6 (a) The rendered view of the assembled wrench


12/13

12 | P a g e

3.8 Part EPart E consisted of creating a rendered animation and an animation that is not rendered. In both the animations

the camera zooms in to the wrench assembly, does a 360 degree turn, the parts fly out, another 360 degree turn is

done, and finally ending after the parts have re-assembled.

(a) (b)Figure 7 (a) The animation screen capture of the wrench not rendered; and (b) the same animation at a different view.

(c) (d)Figure 7 (c) The animation screen capture of the wrench rendered; and (d) the same animation at a different view.


13/13

13 | P a g e

4 DiscussionThe easiest flaws to identify were the dimensions dealing with the pin and screw because they were

easily measured on paper. The flaws that were found in the housing were difficult to find through 2-

dimensional drawing so they had to be modeled using Pro/ Engineer. After modeling the housing part and the

handle it was a lot easier to find the errors associated with the screw threads and the threads located on the

handle. This project contained some challenges such as the helical sweeps for the pin and the screw, also the

overall construction of the housing was difficult. As seen in the assembly views and the animations the parts

coincide in placement within the assembly with some room for error so that the housing can slide on the

handle and so that the screw can rotate about the pin.

5 ConclusionPhase I of project 06 wasnt too difficult especially once the parts were modeled in Pro/ Engineer then

many of the flaws were seen pretty easily. During the course of this project I learned about different threads

and their dimensions and also how to adjust dimensions to fit properly in an assembly. This project was a

refresher of the many features that Pro/ Engineer has to offer but at the same time exploring how to identify

problems and generating solutions.

6 References[1] Roger Toogood, Pro/ Engineer Wildfire 4.0 Tutorial. Edmonton, Alberta. SDC (2009)

Documents

Mark Wilson Project 06