Water Jet

Firstly when you start up the water jet you want to test both the high and low pressure of the jet. The way to do this is to move the nozzle of the jet to around the middle of the water and start the test. Testing is easy all you have to do is push the test button then go over to the side and change the water pressure until it is either up to 40000 PSI for the high pressure, or down to 19000 PSI for the low pressure. Make sure that the hopper for the garnet sand is full.

On the water jet the next thing you want to do every time is check on your work order and directly on your part for the lot number, the type of material (either if it aluminum, steel, titanium, or other types), and if it matches the material form number.

Once you have checked that your part matches your work order you then want to make sure you load your material correctly. The way to make sure it is correctly loaded, is you want to look up the part number on the computer attached to the water jet. Once you find it, the computer will show you exactly how to put the sheet into the machine to cut your part. After you've put loaded the sheet of metal you then have to do the same thing put this time on the program for the water jet, after you've found it in the water jet program you need to also set the material and the size of the metal sheet.

Now you want to set your home for the water jet so it knows where on the table it is. The way to do this is so click the "go home" button on the computer and slowly bring the nozzle closer and closer to the bottom left of the water jet. Once you get it close enough that you can fit the testing pin in between the movable part of the water jet and the immoveable part, the pin should be able to move smoothly though the gap between the two. Then you can zero the x and y axis because that is your home. (Any time you press the "go home" button you should check the x and y with the testing pin.)

Next you want to set the z axis so you can cut the material correctly. First you want to slowly bring the mixing tube down until it is close enough that while swiping the testing piece under the nozzle it gets stuck. Then you should go up 30 thou and check with the testing piece. Now you should bring the water jet cutter to the middle of your part and check again just to make sure there isn't a bow in the material. Lastly you should zero the z axis.

Now that your home and z axis are zeroed you can begin to water jet. To do so all you have to do is right click on the begin machining button and click on spot on placement, and then just click some where on the green line at the beginning of the cut and press begin machining.

After your first part is completed you should pause the machine take out the part ream it and get a first part check, saying that this part is good and the rest of your parts should look like this.

While waiting for your water jet to finish cutting all of your parts you can ream other part that need reaming so that your not wasting time just standing there. Reaming is really simple all you need to do is look on the work order to see what size reaming head you need grab that head and attach it to the reaming machine, then ream the holes the water jet made.

Deburring is another thing you can do while waiting for the water jet to finish. Deburring is also pretty simple you start off with using the deburring cutters to debur the holes in your part. All it does is make is so that the holes have a smoother edge to them.

Deburring also uses the air angle die grinder 90, air disc sander, and a die grinder. The 90 is used to take off the any tap or jagged cuts from the water jet and make them smooth. The air disc is used to make both faces of the part even so that if there were any scratches in the material they are all even. Lastly the die grinder is used has a finish for the edge of a part just to make sure there is nothing sharp.

12 Sided Die

This week we made a 2d Flatpack of an object that we could bend into a 3d thing. We had to design these in Fusion 360. I decided to make a 12 sided die. The way I did this is I made two sides of the die flat and added numbers, after I used the bend tool to create the full die in fusion.

As well as making the flatpack for the die I also showed how it would be cut on the water jet.

Next we printed out the flatpack part of the die on to a piece of paper, and then I cut out the actual die part and the numbers.

After I've cut out the die flatpack I now can tape it down to our poster board that we're cutting our parts out on. Once its taped out to hold it still I draw an outline of both the die and the numbers.