2 Chapter 9 - ObjectivesAfter completing this chapter, you will be able toStart the Autodesk Inventor sheet metal environmentModify settings for sheet metal designCreate sheet metal partsModify sheet metal parts to match design requirementsCreate sheet metal flat patternsCreate drawing views of a sheet metal part
3 Sheet Metal Fabrication Sheet Metal UsesEnclosuresBracketsStructures or Frames
4 Sheet Metal Fabrication Bend TablesL=A+B-x ConstructionL Unfolded LengthA Length of folded face 1B Length of folded face 2x Adjustment from bend tableMeasurements A and B are to the intersection of the extended outer faces on either side of the bend. This intersection is used when the angle of the bend is less than or equal to 90 degrees.
5 Sheet Metal Fabrication Bend TablesL=A+B-x ConstructionL Unfolded LengthA Length of folded face 1B Length of folded face 2x Adjustment from bend tableUse these measurements when the bend angle is greater than 90 degrees. The measurements are parallel to the face, and tangent to the outer surface of the bend. The same formula is used to determine the unfolded length of the part.
6 Sheet Metal Parts Sheet Metal Design Methods Folded State Flat State Disjointed SolidsShelled Parts
7 Sheet Metal Parts Sheet Metal Part Template(s) Sheet Metal Environment Once you convert a part to sheet metal, you can’t change it back.
8 Sheet Metal Tools Sheet Metal Styles Stores sheet metal specific parameters of a partMultiple sheet metal styles can be includedThis should discuss the Sheet tab.Multiple K-factors and bend tables can be added to a style. One is the default method, but the others can be used on a per feature basis.
9 Sheet Metal Tools Sheet Metal Styles Bend Tab None Intersection Technical NoteThe ends of the bend are perpendicular to the bend centerline. The bend terminates at the first edge. Also bend and corner related parameters are default and most of them can be changed on a per feature basis.NoneIntersectionStraight LineArc
10 Sheet Metal Tools Sheet Metal Styles Corner Tab Round Square Tear Trim to Bend
11 Sheet Metal Tools Sheet Metal Face Extrudes a closed profile a distance equal to the sheet metal thicknessUnfold OptionsRelief Options
12 Sheet Metal Tools Contour Flange Created from an open sketch profile Bends are added at sharp intersections
13 Sheet Metal Tools Flange Creates a sheet metal face and bend to an existing faceExtends the full length of the selected edgeTechnical NoteThe standard flange construction technique is to create the flange such that the virtual intersection of the flange and the face is located at the selected edge. This method is used primarily when designing in the context of an assembly. If you are working directly in the part file, the Bend Tangent to Side Face button (located under the Bend Radius field) creates the flange such that the bend is tangent to the edge of the sheet metal face.Flange extends the full length of the selected edge, if not other options are selected at the “>>”. This is also valid for the features “Contour Flange” and “Hem”The “Bend Tangent to Side Face” button is important and useful, if the bend angle is greater than 90 degree
15 Sheet Metal Tools Hem Eliminate sharp edges Strengthen an open edge of a faceMaterial is folded back over a face with a small gapA gap is required because the kernel will merge faces that touch. A convenient way to specify a small gap is to create a User Parameter “o” and make it equal to a very small number (e.g., )SingleDoubleTeardropRolled
26 Sheet Metal Tools Flat Pattern Represents the starting point for sheet metal part manufacturingCreates a 3D model of the unfolded partDisplayed in a 2D drawing viewFlat Pattern - BrowserTechnical NoteThe flat pattern analyzer assumes that cuts go straight through the part. Features like chamfers and embosses will not appear correctly in the flat unless they are placed as iFeatures.
27 Sheet Metal Tools Common Tools Work Features, Holes, Catalog Tools, Mirror and Feature Patterns, Promote, Derived Component, Parameters, Create iMateSimilar to the part environmentTechnical NoteIdentical to the part environment.The part modeling tools can be used to create sheet metal features. For example, a tube can be constructed by extruding a hollow cylinder and cutting a slot.
28 Detailing Sheet Metal Designs 3D Model and Flat Patterns
30 Summary To Do This Create a sheet metal part Create a new part file using a Sheet Metal.ipt template file or click Sheet Metal on the Convert menu.Edit sheet metal stylesClick the Styles tool on the Panel Bar or on the Sheet Metal Features toolbar.Create a sheet metal faceClick the Face tool on the Panel Bar or on the Sheet Metal Features toolbar.Create a sheet metal flangeClick the Flange tool on the Panel Bar or on the Sheet Metal Features toolbar.Create a sheet metal bendClick the Bend tool on the Panel Bar or on the Sheet Metal Features toolbar.Create a sheet metal corner seamClick the Corner Seam tool on the Panel Bar or on the Sheet Metal Features toolbar.Create a sheet metal flat pattern modelClick the Flat Pattern tool on the Sheet Metal Features Panel Bar or on the Sheet Metal Features toolbar.Create a flat pattern drawing viewClick the Base View tool on the Panel Bar or on the Drawing Views toolbar and choose Flat Pattern from the Sheet Metal View: droplist.