Sheetmetal Parts at Harris: Preparing Files for Fabrication
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Updates to Making Sheet Metal Parts for Harris
Harris Standards:
Thicknesses: .062, .093, .125
Bend Radius: 0.032
We need two types of drawings for Harris:
- dxf
pdf files – Step by Step Creation:
- Open the “[year] Part and Assembly File Log” on the Google Drive ([year]/[year] Build Season folder) and sign up for the part drawing you are about to make. Note, it must have a “Y” or “Yes” in the “Mentor approved to Make Drawing” column.
- Open Inventor – you will be using this as a tool to make the .pdf file. We do not need to send the Inventor .ipw file to Harris.
- Open the “2015 Drawing template” in the [year] Build Season (ROBOT)/06 Drawings folder and immediately SAVE AS your part drawing. If you SAVE A COPY AS instead of SAVE AS please remember you will need to then close the template and open your part drawing before changing anything in the file.
- Fill in the Title Block
- Title should match exactly the Part and Assembly File Log title beginning with the part number.
- Date: This must be updated each time the part is sent – it tracks revisions.
- Name of student
- Name of mentor who has reviewed the drawing.
- Edit the text in the lower right
- Number of parts per robot
- Size of material using Harris standards (see top of this page)
- Open the model part file (it must be open to place it).
- Check that the model file has sheet metal defaults as follows:
- Unfold rule is “Harris Shop”
- Thickness if Harris standard (see top of page).
- Place views as you normally would to best represent the part. Include an ISOMETRIC view.
- Dimension Overall length, width and height of the part
- Dimension all hole diameters – precision to three places
- For holes of the same size in the same area, use the “x 4” type of notation to indicate multiple hole locations
- Exceptions: Do not dimension rivet holes
- Do not dimension parts with excessive amounts of holes (check with a mentor)
- Dimension each bend – height and angles other that 90 degrees
- Save the drawing to the 06 Drawings folder
- Save the drawing as a .pdf file:
- EXPORT as a PDF
- Save it to the 06 Drawings/HARRIS PDF DXF FILES folder
- When sent to Harris, they will be moved into a “sent [date]” folder.
.dxf Files – Step by Step Creation:
- Start a new standard .idw file in Inventor. If possible, pick on with no border. If there is a border:
- Delete the border and any other lines on the sheet before proceeding.
- Go to BASE, select the model file, and place the “Flat Pattern” view on the sheet.
- If it says it is not available, go to the model file and create the flat (unbent) view of the part.
- Make sure your scale is 1:1
- Adjust sheet size as needed so that the entire part is on the sheet.
- Save the drawing:
- Go to SAVE A COPY AS and change the “file types” to .dxf
- Click the “OPTIONS” button to the left of SAVE
- The OPTIONS menu will appear. Click on the drop down menu called “File Versions” and select “AutoCAD 2000/LT2000 DXF”.
- Without changing any other settings, click “Next” and then click :Finish”
- Save it in the 06/Drawings/HARRIS PDF DXF file.
- Open AutoCAD.
- Open the .dxf file you just made. You may need to change file type to .dxf to see your file
- Delete any dashed bend lines (click on the line with the mouse and hit the delete button).
- Save the file – Be sure to keep the same version: “AutoCAD 2000/LT2000 DXF” from the drop down menu.
- Update Part & Assembly File Log on Google Drive