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written 5.4 years ago by
yashbeer
★ 11k
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The table shows the general procedure to design the gear box.
| Steps | Particular | Details |
|---|---|---|
| Step 1 | Given data | Power, speeds, reduction ratio, application, design/checking criteria, gear profile, material, design stresses, etc. |
| Step 2 | Assumptions | Meshing, Pressure angle, gear profile, structure, manufacturing method, service factor |
| Step 3 | Material section/properties/FOS/ design stresses | From PSG select the material, write $\sigma_{w}, \sigma_{y},\left[\sigma_{b}\right] \left[\sigma_{\mathrm{c}}\right], \mathrm{BHN}, $ Young's modulus (steel - 2 $\times 10^{5} \mathrm{MPa} \mathrm{CI}-1.8 \times 10^{5} \mathrm{MP} \mathrm{a}$ ) etc. |
| Step 4 | Gear pair dynamics | Reduction ratio, speeds, no. of teeth, form factor, angular velocity, torque, empirical relations of gear pair |
| Step 5 | Strength factor calculation | To decide weaker element |
| Step 6 | Design decision | Pinion or gear to be designed (weaker element) |
| Step 7 | Design criteria and module calculation | Bending/Wear/Surface contact strength |
| Step 8 | Checking criteria | Bending/Wear/Surface contact strength |
| Step 9 | Other dimensions | Find other important dimensions of gears |
| Step 10 | Gear blank construction | Design pinion and gear blanks, shaft, key etc. |
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