Designing Non-Circular Gears: Tips for Drawing Teeth Profiles

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In summary, designing a non-circular gear involves using an involute profile that changes around the gear and ensuring the circumference of the pitch ellipse is an exact multiple of the tooth pitch. Tooth profiles can be drawn using the involute curve or generated through the cutting process. Further information is needed for a more specific answer, but a retired individual with experience in gear design can be consulted for more information.
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ali durmaz
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Hi,
How can ı design a non circular gear?

How drawing teeth profiles?
 
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Welcome to PF.

The tooth profile on an elliptical gear changes around the gear. It is the same involute profile as used on a circular gear with the same radius of curvature at that point. An elliptical gear will then roll smoothly along a rack, or mesh with another elliptical gear at 90° phase. The important thing is to make sure that the circumference of the pitch ellipse will be an exact integer multiple of the tooth pitch.

You can draw the tooth profile using the involute curve, or you can roll the gear numerically along a trapezoidal rack.
Tooth profiles are usually generated by the cutting process. They do not have to be accurately drawn.

We need more specific information before answering further.
 
  • #3
I'd strike up a conversation with somebody who does it for fun.

i roomed at college with this guy . He's retired now like me Check his site.
https://www.youtube.com/user/RonaldWalters47
 
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FAQ: Designing Non-Circular Gears: Tips for Drawing Teeth Profiles

What are non-circular gears?

Non-circular gears are gears with tooth profiles that are not circular in shape. These gears are designed to have varying tooth profiles, such as elliptical, triangular, or even complex shapes, to achieve specific motion or torque requirements.

Why would I need to use non-circular gears?

Non-circular gears are useful for a variety of applications where standard circular gears cannot meet the specific motion or torque needs. For example, they can be used in mechanisms that require variable speed, reversing motion, or precise positioning.

How do I design non-circular gears?

To design non-circular gears, you will need to understand the basic principles of gear design and have knowledge of advanced mathematical concepts such as parametric equations. You will also need specialized software, such as CAD or gear design software, to create and analyze the tooth profiles.

What are some tips for drawing teeth profiles for non-circular gears?

Here are some tips for drawing teeth profiles for non-circular gears:

  • Start by understanding the motion or torque requirements of your mechanism.
  • Choose a suitable tooth profile shape based on the desired motion or torque output.
  • Use parametric equations to define the tooth profile shape accurately.
  • Ensure that the tooth profile has proper clearance and backlash to avoid interference.
  • Use specialized gear design software to create and analyze the tooth profiles.

Are there any limitations or challenges when designing non-circular gears?

Yes, there are some limitations and challenges when designing non-circular gears. These include:

  • The need for advanced mathematical knowledge and specialized software.
  • The potential for increased complexity and cost compared to standard circular gears.
  • The possibility of increased noise and vibration due to the non-uniform tooth contact.
  • The need for precise machining and assembly to ensure proper functionality.

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