9/22/2019 Worm Gear Design Calculation Pdf Merge
Input Parameters
Direct Gear Design® – for Optimal Gear Performance Alex Kapelevich (AKGears, LLC), Thomas McNamara (Thermotech Company). Nwg is the number of teeth of the worm gear. Direct Gear Design input data: Nominal Operating Diametral Pitch. The FEA is used for the stress calculation because the Lewis equation. Calculation of the Efficiency of Worm Gear Drives. To determine the tooth friction in worm gear drives, a tribological calculation method has been developed at the Institute of Machine Elements, Gears, and Transmissions (MEGT), University of Kaiserslautern (Ref. 1).This simplified tribological model of the tooth meshing by worm gears is. A worm gear box is used for higher reduction ratios. This Worm gear design tutorial will discuss the basic worm gear design calculations using the AGMA empirical formulas with an example. Auxiliary Geometric Calculations. Design of module, Number of teeth, Worm diameter factor and correction. Calculation of worm gear unit correction. Worm gear face width design. Worm length design. Calculation of maximum tooth root fillet. Worm Worm Gear Table 9-4 The Calculations of Normal Module System Worm Gears ∇ Double-Threaded Right-Hand Worm Note: All notes are the same as those of Table 9-3. ELEMENTS OF METRIC GEAR TECHNOLOGY T Angle Than The Worm Gear. 9 A ' = = Pitch diameter of worm.
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)
Worm Gear Design Calculation Pdf Merge. The second, found, is a video tutorial that shows how Batman might use SOLIDWORKS to design the infamous Grapple Gun.
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:
Calculated parameters
Common gearing ZN
Spiral gearing ZA
Free helicopters for fsx. Normal tooth pitch
Axial tooth pitch
Basic tooth pitch
Lead
Virtual/alternate number of teeth
Helix angle at basic cylinder
Worm pitch cylinder diameter
Worm gear pitch circle diameter
Worm outside cylinder diameter
Worm gear outside circle diameter
Worm root cylinder diameter
Worm gear root circle diameter
Worm rolling(work) circle diameter
Worm gear rolling(work) circle diameter
Worm gear root circle diameter
Center distance
Chamfer angle of worm gear rim
Worm tooth thickness in normal plane
Worm gear tooth thickness in normal plane
Worm tooth thickness in axis plane
Worm gear tooth thickness in axis plane
Work face width
Contact ratio
εγ = εα + εβ
where:
Minimum worm gear tooth correction
where:
A worm gear box must contain a worm and a mating gear (helical gear) and normally the axis of the worm is perpendicular to the axis of the gear. Look at the picture below: Where, D1 – Pitch Diameter of Worm D2 – Pitch Diameter of Gear C – Centre to Centre Distance between the Worm and the Gear This worm gear design tutorial will discuss up to the selection of the module and pitch and the calculation of the number of teeth, pitch circle diameter and centre to centre distance between the worm and gear. We will use the AGMA formulae for doing the calculations. Design calculations of the other aspects of the worm gear will be discussed in a subsequent part of the tutorial. Steps of the Design Calculation
Speed of the Worm (N1) = 20 RPM Speed of the Gear (N2) = 4 RPM
Worm Gear Design ExcelModule m (in MM) – Pitch P (in MM) 2 ————————-6.238 2.5 ———————- 7.854 3.15 ——————— 9.896 Worm Gear Calculation Pdf4 ————————- 12.566 5 ————————- 15.708 6.3 ———————– 19.792 8 ————————– 25.133 10 ————————- 31.416 12.5 ———————– 39.27 16 ————————– 50.625 20 ————————– 62.832
N1/N2 = T2/T1 And, we will get: T2 = 5 * T1……………….Eqn.1
T1 + T2 > 40………………Eqn.2
T1 = 7 andT2 = 35 Worm Gear Calculation Formula
D1 = 2.4 P + 1.1 = 16.0712 mm
D2 = T2*P/3.14 = 69.53185 mm
C = (D1 + D2)/2 = 42.80152 mm
(C^0.875)/2 <= D1 <= (C^0.875)/1.07 Observe that our D1 value is falling in the range. ConclusionThe worm gear box design calculation explained here uses the AGMA empirical formulas. A few worm gear design calculator are available on web, and some of them are free as well. In the next worm gear box design calculation tutorial we will discuss the force analysis of a worm gear box. Related ReadingHelical Gear vs. Spur Gear: If you have observed a spur gear application, you may have noticed that spur gear can be replaced by helical gear. Where should a helical gear should be used? What are the benefits and disadvantages of doing so? Comments are closed.
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