Revision as of 18:55, 29 November 2012

Purpose

This gate is all about the reassembly of the wrench back to its original state from craftsmen. We will be talking about the order in which each component is put back together and how the components are reassembled inside the wrenches plastic body. Also we will be talking about a specific mechanism that has a key role in the job of our impact wrench. Lastly we will come up with three different design revisions that could potentially improve our device through at least one of the four GSEE factors.

Project Management: Critical Project Review

Workload

Nearing the end of the semester and finals week just two weeks away, the workload is getting larger and larger for almost all of the group members, so this is has caused a need to be as efficient as possible when working on this gate. This means getting all of our group members together and splitting up the workload so no two or three group members are putting in a much larger workload than the rest of the group. For our last gate we ran into a serious issue with people not putting forth the work needed to split up the sections evenly. So for this gate we have ben forced to come up with a meeting minute that will be emailed out to all of the group members and an instructor to show what everyone is assigned and make it so there are no excuses for not getting the work done that is assigned to each member. We hope by doing this the group members that were not putting forth the necessary work in the beginning will be held accountable for their lack of work and/or lack of quality of work. So now by emailing everyone their assignment for the gate instead of just verbally going over what is expected from each member, as a group we can easily keep track of what is being asked and expected of each other.

Group Meetings and Group Management

With gate four we are met with a new obstacle in thanksgiving break. We had group members going home at all different times for break which made it hard to get a group meeting before everyone left for break. So because of this we agreed as a group we would just meet up as soon as possible once we were back on campus, and stay in contact over email during our break. Although it would make for our first group face to face meeting just five days before the gate was due it was the only option we had. As far as anything that has changed from the previous gate for group meeting and management; not much has changed in that we are holding two group meetings each week. Our problem is just getting our whole group to show up to these meetings to get our plan across and make sure we are all on the same page to complete the gate early so we can go over it at an office hour.

Reassembly Process

Product Archaeology and Reassembly

During the reassembly of our Craftsman ½” impact wrench our group used the same process as in gate 2 except in reverse. In the reassembly process, there were minimal challenges that existed as we started to piece the impact wrench back together. When the wrench was disassembled in gate 2, all internal parts such as screws, mechanisms, springs and gaskets were neatly categorized. Every part within a subsystem component was placed in label plastic zip lock bags. Although the impact wrench does not have an extensive parts list their were man screws that were identical in thread pitch but different in overall length. Having each subsystem component categorized helped the ease of assembly for our group. The reassembly process took place with all group members present. Each member had a specific tasks they were in charge of. This included photo documentation of all steps, providing assembly description/ complexity level, and uploading all graphs onto the wiki page. All group members were able to receive a hands on experience with assembling the impact wrench and see how each subsystem is connected together. This process gave everyone a greater knowledge of the mechanical component interactions involved within the tool.

Procedure

All subsystem component bags were categorized depending on which one was dissected out of the impact wrench first. It was agreed upon by all group members that the reassembly process started with the major system components with the most mechanical parts. The subsystems will be assembled in the following order:

1. Rotational Assembly
2. Impact Assembly
3. Regulator System
4. Trigger System

All of the tools needed to perform this task were gathered and organized. In order to start assembling the impact wrench the tools needed are listed below.

1. Metric Allen key set
2. 8T Torx head bit
3. Screwdriver w/ 1/4” drive attachment
4. 3/8” Socket drive wrench
5. 1/2” Socket w/ 3/8” drive attachment
6. Philips head screw driver
7. Flathead screwdriver

The impact wrench also came with and exploded assembly diagram which was included with the purchase. This exploded diagram included and isometric view of how the impact wrench was assembled and a numerical list of all internal parts and part numbers. This list will be referenced to ensure the tool gets assembled properly and precisely.