On your fixture project:
I am very pleased with both the box jig and the main jig projects. I saw many creative and professional designs. Good on ya! ( a term used by Aussies to express a job well done).
I'm adding some info on your fixture project here: Lee told me that some dimensions are missing. You can calculate the location of the stud protruding from the boss. It is located right in the middle of the boss. The distance from the bottom of the part till top of the stud is 22mm (as given). The depth of the slot is 22 mm. Also, check this components sheet carefully and follow the items accordingly. Place this grading sheet in your folder.
If you have any question, write it here or email me, I sometimes miss checking my voice mail!
Keep up the good works and
..... stick to the fun part of design fundamentals!
About Me
- Dr Simin Nasseri
- Simin Nasseri is an Associate Professor at department of Mechanical Engineering Technology, the Southern Polytechnic State University (SPSU).
9 comments:
Professor,
Are we going to be discussing schedule on Tuesday? Right now it looks like we have the fixutre project due on the 20th, then immediately following the break test # 3 and the die project due.
Is that correct?
Thanks
Ken,
Do not worry! I will push one of them back to the last week....yes we will discuss this, but try to work on fixture project and finish it soon.
The die project is very small, something similar to your bonus jig project, so it does not take much time.
If you are concern about the tolerance I have given for the slot, remember that I specifically allocated this tolerance because I wanted you to consider this fact that the slot should be exactly in the middle. This is important in choosing a correct locating system.
Hence, it is ok if you choose a bit more expensive or complicated fixture, since this fixture from design point of view is very special and I'd like to see some more creative designs!
Can we make the part ("joint b") a two part assembly?
In other words, can the block be CNC machined and the threaded section be a stud that is threaded into the block.
This would allow much machining time to be saved, much less material to be wasted and save a lot on the work holders for machining this part.
Found a few helpful webwisites here:
http://www.workholding.com/miteeprod.htm
www.workholding.com
Good luck!
If I were the manager of a company and you were applying for a job as a tool designer at my company and suggesting me to manufacture the parts differently as not to waste time and materials, I would employ you!
But now imagine that you are already a tool designer and I have asked you to design a fixture, because we can not change the production plan. We have received some parts from a client which are not assembled. The client has decided to have parts with slots and we should design a suitable fixture (In some cases, they even decide on number of parts when they evaluate the cost of the fixture, depending on the application of the parts). At that situation, we would lose the project, if we suggested that they could have manufactured the parts differently!
In short, I am just testing your ability in designing a complicated fixture, otherwise designing a fixture which can hold 4 square parts is pretty simple.
...also thanks for the links that you posted. I will add them to our website.
Professor,
For scheduling reasons I need to clarify the plans for the end of this semester.
1. Die proj. assigned: 11/29 due: ?
2. Test 3: 12/04
3. No Final.
Is this correct?
1. Die proj. assigned: 11/29, due: Thursday 6 Dec
2. Test 3: Tuesday 12/04
3. No Final exam.
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