Worm Gear Design Calculation Pdf
- Worm Gear Calculation
- Worm Gear Design Calculation Download Pdf
- Worm Gear Design Formula
- Worm Gear Design Calculation Pdf
- Worm Gear Efficiency Calculation
Basic Geometric Calculation for Worm Gears. Products and versions covered. Worm gear face width design. Worm length design. Calculation of maximum tooth root fillet. Involute spur gear generator and simulator. In addition it let you compose full gear layouts with connetcted gears to design multiple gears system with control.
Formulas for gear calculation – external gears Contents. In involute gear design, all contact between two gears occurs in the same fixed, flat plane. In worm gear drives, a tribological calculation method has been developed at the Institute of Machine Elements, Gears, and Transmissions (MEGT). Gear Generator and Content Center ¤ Understand the Gear Nomenclatures ¤ Use the Autodesk Inventor Design Accelerator ¤ Use the Spur Gear Component Generator ¤.
The application factor is 1.25 and the design factor is 1; gear face width is 2 in. The normal diametral pitch for a worm gear is the same as for a helical gear. Gear Formulas Drive Selection Horsepower and Torque. Determine Design Horsepower. When designing a gear drive when horsepower and speeds exceed the.
Input Parameters
Teeth type - common or spiral
Gear ratio and tooth numbers
Pressure angle (the angle of tool profile) α
Module m (With ANSI - English units, enter tooth pitch p = π m)
Unit addendum ha*
Unit clearance c*
Unit dedendum fillet rf*
Face widths b1, b2
Unit worm gear correction x
Worm size can be specified using the:
- worm diameter factor q
- helix direction γ
- pitch diameter d1
Auxiliary Geometric Calculations |
Calculated parameters
Common gearing ZN
Axial module | mn = m |
Normal module | mx = mn cos γ |
Axial pressure angle | αx = a |
Normal pressure angle | αn = arctg (tg α cos γ) |
Helix/lead angle | γ = arcsin z1/q |
Spiral gearing ZA
Axial module | mn = mx / cos γ |
Normal module | mx = m |
Axial pressure angle | αn = arctg (tg α cos γ) |
Normal pressure angle | αx = α |
Helix/lead angle | γ = arctan z1/q |
Normal tooth pitch
Axial tooth pitch
px = πx |
Basic tooth pitch
Lead
pz = z1 px |
Virtual/alternate number of teeth
Helix angle at basic cylinder
sin γb = sin γ cos αn |
Worm pitch cylinder diameter
Worm gear pitch circle diameter
d2 = z2 mx |
Worm outside cylinder diameter
Worm gear outside circle diameter
da2 = d2 + 2m (ha* + x) |
Worm root cylinder diameter
Worm gear root circle diameter
df2 = d2 - 2m (ha* + c* - x) |
Worm rolling(work) circle diameter
Worm gear rolling(work) circle diameter
dw2 = d2 |
Worm gear root circle diameter
Worm Gear Calculation
Center distance
Chamfer angle of worm gear rim
Worm tooth thickness in normal plane
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Worm gear tooth thickness in normal plane
Worm tooth thickness in axis plane
sx1 = s1 / cos γ |
Worm gear tooth thickness in axis plane
Work face width
Worm Gear Design Calculation Download Pdf
bw = min (b1, b2) |
Contact ratio
εγ = εα + εβ
Worm Gear Design Formula
where:
Worm Gear Design Calculation Pdf
Minimum worm gear tooth correction
where:
Worm Gear Efficiency Calculation
ha*0 = ha* + c* - rf* (1 - sin α) | |
c = 0.3 | for α = 20 degrees |
c = 0.2 | for α = 15 degrees |