UNIVERSITY AT BUFFALO

Project 06 Adjustable Wrench Redesign

Ryan R. Bierl

10/23/2009

Project 06 introduced us to the redesign process by requiring us to redesign an adjustable wrench. We had to identify the errors in a 2D drawing, rectify those errors, and model the newly designed parts. Also we had to create assembly views of the wrench as well as rendered figures. The last part of this project was the creation of animations, both rendered and non-rendered, to show how the parts fit together.

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Table of Contents 1 Introduction .......................................................................................................................................... 3

2 Requirements ........................................................................................................................................ 3

3 Results ................................................................................................................................................... 3

3.1 Phase 1 .......................................................................................................................................... 3

3.1.1 Part A: Problems with Design of Wrench .............................................................................. 3

3.1.2 Part B: Solutions for Wrench Design ..................................................................................... 4

3.2 Phase 2 .......................................................................................................................................... 5

3.2.1 Part A ..................................................................................................................................... 5

3.2.2 Part B ..................................................................................................................................... 6

3.2.3 Part C ..................................................................................................................................... 7

3.2.4 Part D .................................................................................................................................... 8

3.2.5 Part E ..................................................................................................................................... 8

4 Discussion .............................................................................................................................................. 8

5 Conclusion ............................................................................................................................................. 9

6 References ............................................................................................................................................ 9

7 Appendix ............................................................................................................................................. 10

7.1 A: ................................................................................................................................................. 10

7.2 B: ................................................................................................................................................. 11

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1 Introduction Project 06 consists of the redesigning of a wrench that has already been drawn in 2D with dimensions.

The only problem is that the dimensions on the drawing are incorrect. Project 06 is an introduction to

the redesign process that we will encounter in the real world and in future projects.

2 Requirements Project 06 consisted of two phases. Phase 1 has us identify the incorrect dimensions by first trying to

model the wrench in Pro Engineer. By doing this we will be able to see what dimensions need to be

changed. We tabulated these errors and then came up with ways to fix them. Also we had to create 2D

drawings highlighting the changes we made to each part.

Phase 2 consisted of the modeling of the newly designed parts of the wrench. Also we had to create an

assembly showing how the parts fit together. As in previous projects we had to create 2D drawings of

the new model with appropriate dimensions. Also we were required to create a rendered model

assigning various material appearances to the individual parts and create a video showing the

relationship of the parts with one another.

3 Results

3.1 Phase 1

3.1.1 Part A: Problems with Design of Wrench

Component Problem

Handle 1.) The thread and the flat surface before the start of the thread should be

flush; however the dimensions given will not produce that.

2.) There are no dimensions for the triangular surface in the corner of the

handle.

Housing 1.) The length of the large cut out in the housing should not be 1 in.

2.) The dimension of 7/16th

in on the front view is not possible

3.) The dimension of 7/16th

in on the side view is not possible

Screw 1.) There are no problems with this part.

Pin 1.) There are no problems with this part.

Misc. 1.) There are no dimensions for the rounds throughout the drawing, even

though the drawing includes them.

2.) When describing the holes for the housing the term “NC” is used.

Table 1: explains design problems with wrench

For this part of Phase 1 we had to attempt to model the parts of the wrench in Pro Engineer. I say

“attempt” because some of the dimensions on the parts were incorrect and impossible if you wanted

the wrench to fit together and perform how it was intended. We had to use many of the modeling

techniques that were learned in previous projects such as, pattern, blend, and helical sweep.

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3.1.2 Part B: Solutions for Wrench Design

Component Solution Sketches

Handle 1.) Changed dimension to .0833”

2.) Created a triangular extrusion and

added a chamfer

Housing 1.) Changed dimension to .9375”

2.) Changed dimension to .3825”

3.) Changed dimension to .3825”

Screw N/A N/A

Pin N/A N/A

Misc. 1.) Added round of appropriate sizes

where necessary

2.) N/A

N/A

Table 2: explains solutions to faulty design (for larger images of the sketches see Appendix B)

For this section of Phase 1 we had to come up with ideas to fix the faulty dimensions of the wrench

parts. This just meant we had to change the values of the dimensions, not add new parts or change the

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shape of existing parts. After we made the changes we needed to make sketches of the parts

highlighting the changes we made.

3.2 Phase 2

3.2.1 Part A

(a) (b)

(c) (d)

(e) (f)

(g) (h) Figure 1: (a-h) redesigned parts of the wrench

Part A of Phase 2 consisted of modeling the redesigned parts of the wrench in Pro Engineer. To model

these parts we had to use all of the skills that we have learned in previous projects, such as helical

sweep, revolve cut, and blend. The blend in the handle (b), was by far the most difficult aspect of the

modeling. It took me a while to figure it out and I had to look at the “Toothpaste Tutorial” from an

earlier project. Also finding the dimensions of the threads was very tedious. Some of the dimensions in

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the Machinery’s Handbook on UB Learns were unclear. All in all this part of Project 06 was not too

difficult.

3.2.2 Part B

Figure 2: 2D drawing of the wrench parts and assembled wrench

For Part B of Project 06 we had to create a 2D drawing of the parts of the wrench and the assembled

wrench. This was very easy, since we had done this in a previous project. The only problem I had was

with the assembled view of the wrench. I did not want it to be wireframe but I had no choice because

when I chose the no hidden option there was something wrong. When selecting the no hidden option,

for some reason it would cut off part off the housing from the picture; just showing blank space. At first I

thought it was because of how I exploded the assembly view, but I checked and that was not the issue.

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3.2.3 Part C

(a) (b)

(c)

Figure 3: (a-c) various views of the wrench assembly

For this section of Part C we had to create an assembly model showing how the parts interacted with

each other. This section was simple due to the fact that we had done this in earlier projects.

(a) (b) Figure 4: various views of the exploded assembly

The last task for Part C was to create an exploded view of the assembly of the wrench. This was also very

simple. All you had to do was access the edit position dialogue in the explode tab and move the parts

where you wanted them.

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3.2.4 Part D

Figure 5: rendered image of the wrench

For Part D we had to create a rendered image of the wrench with the parts being various materials. The

handle needed to be cast iron, the housing needed to be brushed iron, and the screw and pin could be a

metal of our choosing. This was quite simple to accomplish since a whole project was already dedicated

to creating rendered images of models. Also we had to establish an appropriate setting and lighting in

the image.

3.2.5 Part E

(a) (b)

Figure 6 (a) print screen of the video with non-rendered wrench (b) print screen of the video with the rendered wrench

For Part E we had to create two animations of the wrench, one rendered and one without rendering.

These animations had to be similar to that of the phone animations that we had done previously. These

animations showed how the parts went together and showed all possible angles of the wrench. The

creation of the videos was very easy, because once again this was covered in a previous project. The

only issue I had was the same issue I had before. The rendering of the video takes forever. Luckily I had

some work that I was able to while waiting for the completion of the rendering.

4 Discussion Project 06 was a very good test of our abilities in Pro Engineer. It utilized most, if not all, of the skills that

were learned in the previous projects. We had to model several parts and create an assembly as well

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videos showing how the parts went together. For the most part this project went very smoothly. The

only things that gave me a hard time was the looking up of the dimensions for the various thread types,

and the creation of the blend on the handle. Some of the dimensions for the threads were confusing but

after closer inspection and some patience they became clear. At first I tried to model the blend from

memory; however that failed me and I could not get the blend to look as it should. I then looked at the

tutorial we used in a previous project and everything clicked.

5 Conclusion The goals of Project 06 were to test our abilities in Pro Engineer and introduce us to the redesign

process. I believe I met these goals. I now understand, for the most part, what it takes to redesign a

product. Also I believe that I have completed this project accurately and to the best of my ability.

6 References The following were used to complete Project 06

Machinery’s Handbook on UB Learns

“Toothpaste Tutorial” on UB Learns

“Helical Sweep Thread” (PDF) on UB Learns

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7 Appendix

7.1 A:

Figure 7: question sheet and answers from Phase 1

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7.2 B:

(a) (b)

Figure 8 (a)larger sketch of changes in the handle (b) larger sketch of changes in the housing