· Web viewA bevel gear is designed to interface with another bevel gear, and where both sets of...
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Fall 2020 Part Mini Project Tips on Part 1058 The drawing was hand made in the 1946. As such, it may include errors, omissions, duplicate dimensions, or other inconsistencies that would prevent your model from being properly constrained (resulting in under or over constraint). This is where your engineering judgment comes in: Identify design intent (i.e., what was the purpose of the feature in question?). Determine which dimensions are of highest importance and should be maintained. Determine which dimensions can be altered. Keep track of your assumptions throughout. Modeling Tips: 1. Make sure you’re in the units you want to be in. 2. The more complex your sketch, the more important it is to place sketch entities near where you want them as you’re sketching. Adding dimensions later to inaccurately sketched geometry can result in big changes that might require deleting and recreating relations and/or sketch entities. 3. Be mindful of auto-relations that Solidworks will add with each click (yellow icons prior to click). 4. Consider use of feature fillets (rather than sketch fillets) to minimize clutter and complexity in the main sketch profile of your Revolve. 5. Use SolidWorks dimension input box as a calculator to make your job easier. a. You can enter “0.875-0.218” and let Solidworks do the math. b. If you already have at least one equation in the model (so that Equations show up in your feature tree), you can enter 1
Transcript of · Web viewA bevel gear is designed to interface with another bevel gear, and where both sets of...
Fall 2020 Part Mini Project Tips on Part 1058
The drawing was hand made in the 1946. As such, it may include errors, omissions, duplicate dimensions, or other inconsistencies that would prevent your model from being properly constrained (resulting in under or over constraint). This is where your engineering judgment comes in:
· Identify design intent (i.e., what was the purpose of the feature in question?).
· Determine which dimensions are of highest importance and should be maintained.
· Determine which dimensions can be altered.
· Keep track of your assumptions throughout.
Modeling Tips:
1. Make sure you’re in the units you want to be in.
2. The more complex your sketch, the more important it is to place sketch entities near where you want them as you’re sketching. Adding dimensions later to inaccurately sketched geometry can result in big changes that might require deleting and recreating relations and/or sketch entities.
3. Be mindful of auto-relations that Solidworks will add with each click (yellow icons prior to click).
4. Consider use of feature fillets (rather than sketch fillets) to minimize clutter and complexity in the main sketch profile of your Revolve.
5. Use SolidWorks dimension input box as a calculator to make your job easier.
a. You can enter “0.875-0.218” and let Solidworks do the math.
b. If you already have at least one equation in the model (so that Equations show up in your feature tree), you can enter “= 0.875-0.218” and have Solidworks compute the difference AND store the math as an equation.
c. You can be modeling in inches and enter “100mm” and Solidworks will convert to the active units selected in the model.
d. You can enter “0.25in + 6mm” and let Solidworks do the conversion and addition.
6. Use the Measure tool from the Evaluate toolbar to double-check your part modeling accuracy.
7. Elements not required for a perfect score (although may be considered for additional above and beyond points in the event that your effective use of views and clean dimensioning scheme weren’t as effective and clean as you hoped):
a. Dimensional tolerances provided on the drawing – if you’re curious about any of them, feel free to ask, but you’re not required to add them into your model.
b. Surface finish callouts – not required.
c. Making a perfect gear profile – see important note at bottom of page 2.
d. Learning Italian (no points for this one, unfortunately) – see translations on page 3.
Gear Tooth Tips
A bevel gear is designed to interface with another bevel gear, and where both sets of teeth lie in a cone. This conical surface tapers down from the outer edge (the largest tooth profile) to a common point.
You are making just one bevel gear, but knowing that the teeth lie on a cone and taper to a point can help you as you create your model (hint: a straight extrude or cut won’t capture the tapering nature of the teeth).
IMPORTANT NOTE: For the purposes of this assignment, you do not need to make an accurate tooth profile. It is sufficient to make a straight line at the top, and a constant radius curve for the side. A sketch fillet at the base would also improve the appearance likeness to that of a “real” gear. If for some reason you want to make the gear profile a true gear profile, I suggest using Geartrax on the two GJ114 computers along the central part of the north wall—the computers are labeled – while this could add to above and beyond points, this is not a requirement in order to get a perfect score.
Translations for the part mini project drawing
Part 1058 from the Autofalciatrice 851 Italian Tractor assembly
Italian English
Ingranaggio conico con flangia per differ Krupp ML4
Bevel gear with flange for Krupp ML4 differential
Ghisa meccanica
Cast Iron
Tolleranza generale
General Tolerance
Modulo
Module (of the gear) – ratio of the pitch diameter divided by the number of teeth.
No Denti
Number of Teeth
Ø Primitivo
Pitch diameter
½ angolo cono primit.
½ of the cone angle of the gear
Ang. Base del dente
Dedendum angle – Angle from the center of the tooth to the base of the tooth
Ang. Sommita del dente
Addendum angle – Angle from the center of the tooth to the top of the tooth
Ø Esterno
Outside diameter
Ø Interno
Inside diameter
Altezza dente
Tooth height
Ang. assiale
Axial angle
Fori Passanti
Through holes
Sm.
Abbreviated form of “smussare”, meaning chamfer
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