Group 15 - GM Transmission - Revision history

MAE277 15 09: /* Solid Modeled Assembly */

2009-12-16T00:07:47Z

Solid Modeled Assembly

MAE277 15 09: /* Executive Summary */

2009-12-15T23:57:41Z

Executive Summary

MAE277 15 09 at 23:52, 15 December 2009

2009-12-15T23:52:17Z

MAE277 15 09: /* Management Proposal */

2009-12-15T19:46:07Z

Management Proposal

MAE277 15 09: /* Initial Product Assessment */

2009-12-15T19:41:39Z

Initial Product Assessment

MAE277 15 09: /* Solid Modeled Assembly */

2009-12-11T14:38:58Z

Solid Modeled Assembly

MAE277 15 09: /* Solid Modeled Assembly */ added reason to pick autodesk inventor professional 2010

2009-12-11T14:38:08Z

Solid Modeled Assembly: added reason to pick autodesk inventor professional 2010

MAE277 15 09 at 20:03, 7 December 2009

2009-12-07T20:03:56Z

MAE277 15 09: /* Reassembly Discussion */

2009-12-07T15:25:51Z

Reassembly Discussion

MAE277 15 09: /* Reassembly Discussion */

2009-12-07T05:45:57Z

Reassembly Discussion

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 ==Solid Modeled Assembly==
 The job of the solid modeler is to create digitally rendered assembly showing how some of the parts of the transmission fit together. The parts that we decided to be reconstructed digitally belong to the valve piston. Essentially the piston valve used to control the flow of a fluid by using linear motion. Having some background for the job Mason Roalsvig was a good choice to solid model the piece.
-The CAD that was eventually decided on was Autodesk Inventor Professional 2010. While Mason has experience with AutoCAD, most of his experience was with Inventor 2003 during high school. Once a base of knowledge is established with Autodesk Inventor using it becomes easy, easier than trying to imagine a designated view, to build the part and projecting the designated views. Inventor is also much more powerful with many tools for anything from stress testing to deriving volumes. It also comes with a studio portion in which you can provide a path for parts to enter their constraints.
+The CAD that was eventually decided on was Autodesk Inventor Professional 2010. While Mason has experience with AutoCAD, most of his experience was with Inventor 2003 during high school. Once a base of knowledge is established with Autodesk Inventor, using it becomes easy. Which is much easier than trying to imagine a designated view, to build the part and projecting the designated views. Inventor is also much more powerful with many tools for anything from stress testing to deriving volumes. It also comes with a studio portion in which you can provide a path for parts to enter their constraints.
 [[image:part1-1.pdf]]

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 ==Executive Summary==
-In all this project was a great success. From the beginning our group functioned well and was able to meet all deadlines and goal which were set. The entire transmission was dissected and recorded in great detail. This was a great accomplishment considering the lack of technical skills with in the group. Perhaps more impressive is the fact that the transmission was reassembled. The wide variety of parts meant that all of the notes, photographs and minds were used extensively. The entire process has been chronicled here on this wiki page, and several highlights were selected for a presentation in class.
+A transmission is a highly complicated piece of precision machinery. In the automobiles of today, a transmission is an essential element. Group 15 was given a General Motor's transmission, and was tasked with completing a product dissection of it.  From the beginning the group functioned well and was able to meet all deadlines and goal which were set. The entire transmission was dissected and recorded in great detail. This was a great accomplishment considering the lack of technical skills with in the group. Perhaps more impressive is the fact that the transmission was reassembled. The wide variety of parts meant that all of the notes, photographs and minds were used extensively. The entire process has been chronicled here on this wiki page, and several highlights were selected for a presentation in class.
 ==Reassembly Process==

← Older revision		Revision as of 23:52, 15 December 2009
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		+	==Executive Summary==
		+
		+	In all this project was a great success. From the beginning our group functioned well and was able to meet all deadlines and goal which were set. The entire transmission was dissected and recorded in great detail. This was a great accomplishment considering the lack of technical skills with in the group. Perhaps more impressive is the fact that the transmission was reassembled. The wide variety of parts meant that all of the notes, photographs and minds were used extensively. The entire process has been chronicled here on this wiki page, and several highlights were selected for a presentation in class.
		+
	==Reassembly Process==		==Reassembly Process==

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 == Management Proposal ==
-In order for the dissection to be successful, there needs to be an establish plan. Each member needs to have a set role, so that everyone knows exactly what is expected of them. With these set roles, each person will be free to work on the project as they deem fit. The only restriction being that each member has deadlines to complete his or her part. Some duties intrinsically overlapped, while others may elect to work independently. Each member realizes that they probably will be called upon to assist others when necessary. A key concept of this group is the creation of a position which is flexible, giving that person the ability to work on whatever is needed at the time. Each team member and their role are as follows
+In order for the dissection to be successful, there needs to be an establish plan. Each member needs to have a set role, so that everyone knows exactly what is expected of them. With these set roles, each person will be free to work on the project as they deem fit. The only restriction being that each member has deadlines to complete his or her part. Some duties intrinsically overlapped, while others may elect to work independently. Each member realizes that they probably will be called upon to assist others when necessary. A key concept of this group is the creation of a position which is flexible, giving that person the ability to work on whatever is needed at the time. Meetings will be set as needed and during times which are convenient for the majority of the group. Conflicts will be resolved by the people involved, if this can not be done, then Bryan will help and then either the professor or a Teacher's Assistant will be contacted. Each team member and their role are as follows:
 '''Project Manager''' - Bryan Carter

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 ) Many automakers develop their own transmission systems. Transmission   systems commonly range from 3 to 6 gears. Higher end performance cars and high power vehicles generally have more gears than lower cost economy vehicles. Manuel transmission is also available. This is engaged by a pedal the driver uses and gears are switched using a shifter. <br>
-	a. Manuel transmission will generally cost $1000-$2000 less in most vehicles, as automatic is more complex and more convenient to operate. [[Image:014(1).jpg]] <br>
+	a. Manuel transmission will generally cost $1000-$2000 less in most vehicles, as automatic is more complex and more convenient to operate. <br>
 	b. A bonus of manuel transmission for experienced drivers is increased fuel economy as well as more control over the wheels. Keeping a car in low gear is important if you get stuck in snow or mud.<br>
 	c. Automatic transmission is generally better for new drivers as you do not need to focus on the RPMs or speed of the vehicle and can focus more on the road itself. This can be safer due to the fact that new drivers have more trouble gauging speed and RPMs.

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 The solid modeling was done using Inventor. Mason had extensive experience with this program, so he volunteered to create the solid model. The piece was selected because the pieces were easy to create when using a CAD program.
 [[image:part1-1.pdf]]
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 *Note: To open the previous link, you must click on one, then click on the name again the the window which opens*
 ==Engineering Analysis==

← Older revision		Revision as of 14:38, 11 December 2009
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	Note: To open the previous link, you must click on one, then click on the name again the the window which opens		Note: To open the previous link, you must click on one, then click on the name again the the window which opens
		+
		+	The job of the solid modeler is to create digitally rendered assembly showing how some of the parts of the transmission fit together. The parts that we decided to be reconstructed digitally belong to the valve piston. Essentially the piston valve used to control the flow of a fluid by using linear motion. Having some background for the job Mason Roalsvig was a good choice to solid model the piece.
		+
		+	The CAD that was eventually decided on was Autodesk Inventor Professional 2010. While Mason has experience with AutoCAD, most of his experience was with Inventor 2003 during high school. Once a base of knowledge is established with Autodesk Inventor using it becomes easy, easier than trying to imagine a designated view, to build the part and projecting the designated views. Inventor is also much more powerful with many tools for anything from stress testing to deriving volumes. It also comes with a studio portion in which you can provide a path for parts to enter their constraints.

	==Engineering Analysis==		==Engineering Analysis==

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 ==Reassembly Process==
-The reassembly of the transmission was essential the opposite of the dissection. First the governor was reattached. After this the planetary gear was inserted, followed by a ring bearing and the ring gear. The spurred shaft was inserted next with a retaining ring being put in next. The retaining ‘C’ clips were much easier to get in than to take out. This is because the rings expand into slots in the side of the case. The only issue was that multiple rings are used in a transmission, which means that the rings would occasionally get caught in the wrong grove, but it was still easier to push down the clip than to remove them. Next the clutch rings were put back in, another planetary gear set then followed. A circular ring bearing was placed in next.  A spring loaded metal plate was then inserted and another retaining ring was then used. The spring loaded plate was especially difficult because it fit very tightly. The end of a hammer was used to force it down. <br><br>
+The reassembly of the transmission was essentially the opposite of the dissection. First the governor was reattached. After this the planetary gear was inserted, followed by a ring bearing and the ring gear. The spurred shaft was inserted next with a retaining ring being put in next. The retaining ‘C’ clips were much easier to get in than to take out. This is because the rings expand into slots in the side of the case. The only issue was that multiple rings are used in a transmission, which means that the rings would occasionally get caught in the wrong grove, but it was still easier to push down the clip than to remove them. Next the clutch rings were put back in, another planetary gear set then followed. A circular ring bearing was placed in next.  A spring loaded metal plate was then inserted and another retaining ring was then used. The spring loaded plate was especially difficult because it fit very tightly. The end of a hammer was used to force it down. <br><br>
-The next section was perhaps the most difficult because of the closely messing pieces. This made of a difficult time reassembly because the pieces refused to stay in a position which would allow the reassembly to happen. The solution which was devised was to preassemble the short shaft, bell shaped housing, planetary gear set, ring gear and inner clutch pack all into one piece which allowed for easier reassembly. After this sub-assembly was used, the locking belt was next followed by a retaining plate.<br>  <br>
+The next section was perhaps the most difficult because of the closely messing pieces. This made reassembly difficult because the pieces refused to stay in a position which would allow the reassembly to happen. The solution which was devised was to preassemble the short shaft, bell shaped housing, planetary gear set, ring gear and inner clutch pack all into one piece which allowed for easier reassembly. After this sub-assembly was used, the locking belt was next followed by a retaining plate.<br>  <br>
 From this point on, the job became markedly easier. It was literally the exact opposite of the disassembly. The drive train assembly was then placed back onto transmission. The hydraulic system was preassembled while the rest of the transmission was being reassembled. This made for a quicker reassembly. The side of the transmission for hydraulic distribution was then put back together, using pictures taken during the disassembly.

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 The disassembly process was easier than the reassembly process because of the numerous components that had to fit back into place. Since there were a lot of components, it would have been even more difficult to keep track of where each piece fit without having the assistance of pictures or videos. The tools used for the dissection were also used for reassembly but for the components inside mostly hands were used. For the bolts and screws 10mm and 13mm socket wrenches were used. It was not possible to reassemble the entire product due to missing and broken components and it took a longer time to figure out which bolts fit with which components. Overall, the product is reassembled to the state it was in before the dissection.
-With limited knowledge of how different transmissions work recommendations are difficult to make. However I did find some odd designs that could flaw the system. The reason the transmission did not work was essentially on piece shattered. This provides no fail safes against these types of problems. If the vehicle had a by pass system of maybe a direct connection to the drive shaft in case of emergency the vehicle could be safely driven to a mechanic to be repaired rather than stranding the person in the middle of the road.
+With limited knowledge of how different transmissions work, recommendations are difficult to make. The reason the transmission did not work was essentially that one piece shattered. The design of the transmission provides no fail safes against this types of problem. The transmission could have a by pass system, such as a direct connection to the drive shaft which is engaged in an emergency. This would make it so that the vehicle could be safely driven to a mechanic to be repaired, rather than stranding the person in the middle of the road.
-Putting a few of the pieces back in to place involved considerable amounts of luck. One piece fit into a bored cylinder but the cylinder was on the top that had to be bolted in to place. We could not simply turn the product over as the gear assembly would fall out so we centered the piece where it should go in and after a few repeated tries got it.
+The fasteners used to keep the gear packs in place were also a hassle to remove and  an easier alternative could be found. Rather than using a ring and groove system; a ring bolted into place would be more effective and easier to repair.
-The fasteners used to keep the gear packs in place were also a hassle to remove and I an easier alternative could be found. Rather than using a ring and groove system, a ring bolted in to place would be more effective.
+There have been many new improvements to transmissions, including a belt system and systems that have the next gears pre aligned, essentially using two separate gear packs on parallel shafts that the clutch switches back and forth. These methods provide smoother and more efficient alternatives to many standard designs. However, they are expensive and probably can not carry the required torque.
-−
-There have been many new improvements to transmissions, including a belt system and systems that have the next gears pre aligned, essentially using two separate gear packs on parallel shafts that the clutch switches back and forth. These methods provide smoother and more efficient alternatives to many standard designs. They are however expensive and i doubt are needed in commercial trucks (semi-trucks) and probably can not carry the required torque.
 ==Component List==

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 A gear on the inside of the transmission is broke into eight pieces. Tape is also on several parts because previous groups had used tape to label them. Further, there were several cracks in the case itself. The product has not worked in a while and more than likely will never work again.
-The disassembly process was easier than the reassembly process because of the numerous components that had to fit back into place. Since there were a lot of components, it would have been even more difficult to keep track of where each of them fit without having pictures or videos to assist us. The tools we used for the dissection were also used for reassembly but for the components inside we used mostly our hands and for the bolts and screws we used 10mm and 13mm socket wrenches. We were not able to reassemble the entire product due to missing and broken components and it took a longer time to figure out which bolts fit with which components. Overall we managed to reassemble the components to their state before the dissection.
+The disassembly process was easier than the reassembly process because of the numerous components that had to fit back into place. Since there were a lot of components, it would have been even more difficult to keep track of where each piece fit without having the assistance of pictures or videos. The tools used for the dissection were also used for reassembly but for the components inside mostly hands were used. For the bolts and screws 10mm and 13mm socket wrenches were used. It was not possible to reassemble the entire product due to missing and broken components and it took a longer time to figure out which bolts fit with which components. Overall, the product is reassembled to the state it was in before the dissection.
 ==Component List==