Transmission design

Calculation types

• Design
  Basic dimensions and all other geometry parameters of gear listed below in “Calculation results” section are calculated by external loads, materials, longevity, and operation modes.
• Design with constraints
  Gear design calculation with fixed some gear parameters.
• Torque checking
  Maximum output torque calculation by given gear geometry and longevity.
• Longevity checking
  Longevity calculation by given gear geometry and torque.
• Summary addendum modification calculation for given center distance
• Geometry
  All gear geometry parameters calculation.

Calculation results

I. Results of gearing calculation for arbitrary reference profile:

• Gear dimensions by loads and longevity.
• All required gear geometry parameters.
• Forces in a contact.
• Acting contact and bending stresses.
• Allowable contact and bending stresses.
• Control parameters.
• Gearing quality parameters.
• Tolerances of pinion and wheel basic dimension and gearing.
• Backlash and backlash tolerance.
• Involute tooth shape by rolling method to control thinning/undercut.
• Engagement process modeling to control interference.
• Automatic gear drawing generation.

II. Results of flexible connection transmission calculation:

• Dimensions of pulleys, stars, chains and belts.
• Acting loads.
• Automatically generated drawings of pulleys and stars.

Transmission types

1. Involute tooth gearing:

• External spur
• Internal spur
• Helical
• Herring-bone
• Bevel gear with straight teeth
  -With same addendum modification;
  -With different addendum modifications.
• Spiral bevel gears of three different tooth shapes
• Worm gears with
  - Archimed worm
  - Convolute worm
  - Involute worm
  - Torus-like worm
  - Conical worm

2. Flexible connection transmission:

• Belt transmission
• Flat belt
• V-belt
• Chain transmission of different types

Calculation criteria

• Gearing is designed based on fatigue strength for contact and bending stresses.
• Chain transmission is designed based on wear-resistance and static strength.
• Belts are designed based on load-carrying capacity.

Extra features

• Arbitrary or some predefined operation regimes can be used.
• Customized database including standard tools, materials and other standard pa-rameters can be used by calculation.
• Calculation results and initial data can be exported in:
  -DXF
  -RTF
  -Solid Edge (*.par)
  -INI
  -XLS
  -Text file with separators
  -Module can be easily customized for required standards

Required modules and components

• APM Trans – transmission design module
• APM Graph – 2D graph editor (recommended)
• APM Base – database management module (recommended)
• APM Mechanical Data – mechanical engineering database of standard machine elements and reference data
• APM Material Data – material database

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