Worm Gear Design Calculation Pdf Creator

Posted on  by 

Lecture 16 – WORM GEARS WORKED OUT PROBLEMS. Design a worm gear set to deliver 12 kW from a shaft rotating at 1500 rpm to another. 3 / 16 1 Task 1.1 Task To calculate a worm gear with center distance 100 mm. The worm has 2 teeth, and the worm wheel has 41 teeth. Formulas for gear calculation – external gears Contents: Relationship between the involute elements Determination of base tooth thickness from.

  1. Worm Gear Design
  2. Worm Gear Design Calculation
  3. Worm Gear Calculation
  4. Worm Gear Design Guide

Worm Gears • Ball Bearings •. The Type of Strength Calculation is set to Design Key Length if the intent is to have the key. Create a gear box for an. Introduction to Gears A gear is a rotating machine part having cut teeth, which mesh with another toothed part in order to transmit mechanical motion and power. Gears are very versatile machine elements; they range in size and use from tiny gears in watches to large driving gears in punch presses.

Gear

Generator

Animation:



* Shift + Enter: Set RPM of the selected gear

Connection properties



Gear properties






* Shift + Enter: modifies the Diametral pitch

Download


Display





Units

Gear Generator is unitless: if you wish it's inches, cm or millimeters. DXF opened in AutoCAD will have the same value for D/P as it is set above. Gears in SVG are measured in pixels, which is the value multiplied with the scale (Pixel per Unit) as it is displayed on the right side.

About

Gear Generator is a tool for creating involute spur gears and download them in DXF or SVG format. In addition it let you compose full gear layouts with connetcted gears to design multiple gears system with control of the input/output ratio and rotation speed. Gears can be animated with various speed to demonstrate working mechanism.

Why this tool was created? Just for fun. I'm working on a hobby project, a scale construction machine, which needed some spur gears, and I quickly made a simple spur gear creator script in Javascript with SVG output. As it was done, I couldn't stop, and I added more and more features, and finally I got this tool. It was a pleasure to code the whole thing, I'm a bit sad it is already done.

Support: abel@iparigrafika.hu

Notes about browser compatibility: all new major browsers are supported (i didn't tested IE), but unfortunately Chrome can't render SVG circle correctly. The winners are: Opera for the best performance (shame on me, I never use it) and Firefox for the best looking SVG render.

Update 1.4: TA-DA: Added internal gear support, and the ability of positioning the first gear.

Update 1.3: Fixed DXF file format.

On YouTube

Finally some videos I found on youtube:
Gear Generator How to Draw Perfect Gears (4:23)
Laser Cut Gears (3:08)
Prototype your gear sets in 2D (1:19)

Check out other tools I made:
Print Charts, Flip.World, HTML Spirograph.

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 design calculation

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

Center distance

Worm Gear Design

Chamfer angle of worm gear rim

Worm tooth thickness in normal plane

Worm Gear Design Calculation

Worm gear tooth thickness in normal plane

Worm tooth thickness in axis plane

Creator

sx1 = s1 / cos γ

Worm Gear Calculation

Worm gear tooth thickness in axis plane

Work face width

Worm Gear Design Guide

bw = min (b1, b2)

Contact ratio

εγ = εα + εβ

where:

Minimum worm gear tooth correction

where:

ha*0 = ha* + c* - rf* (1 - sin α)

c = 0.3

for α = 20 degrees

c = 0.2

for α = 15 degrees

Coments are closed