Worm Gear Design Calculation Pdf Creator

Input Parameters

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. Cone Drive, Franke Gear, Westem. Gear and Yard, Design.o.fDouble Enveloping Worm Gearing The design of Cone double enveloping worm geaing isbased on a different tooth form concept. Instead of involute or other curved tooth forms, most double enveloping gears have straight sided forms on both the gear teeth and worm threads with this.

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

PdfDesign

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

Center distance

Chamfer angle of worm gear rim

Worm tooth thickness in normal plane

Worm gear tooth thickness in normal plane

Worm Gear Calculation Pdf

Worm tooth thickness in axis plane

sx1 = s1 / cos γ

Worm gear tooth thickness in axis plane

Work face width

bw = min (b1, b2)

Contact ratio

εγ = εα + εβ

where:

Minimum worm gear tooth correction

Worm Gear Design Calculation Pdf Creator Download

where:

ha*0 = ha* + c* - rf* (1 - sin α)

c = 0.3

for α = 20 degrees

c = 0.2

for α = 15 degrees

Insert 1 gear

  1. On the ribbon, click Design tabPower Transmission panel Spur Gear.
  2. On the Spur Gears Component Generator, Design tab:
    • Enter the values for the Common section.
    • In the Gear 1 section, select Component from the list.
    • In the Gear 2 section, select No Model from the selection list.
  3. Click OK.
    Note: Curve used in a tooth shape is simplified.

On the Calculation tab, you can perform calculations and a strength check. The calculation is performed when you click Calculate.

Insert 2 gears

Using the Spur Gears Generator, it is possible to insert maximum 2 gears at the same time.

  1. On the ribbon, click Design tabPower Transmission panelSpur Gear.
  2. On the Spur Gears Component Generator, Design tab:
    • Enter the values for the Common section.
    • In the Gear 1 section, select Component from the list.
    • In the Gear 2 section, select Component from the list.
  3. Click OK.

On the Calculation tab, you can perform calculations and a strength check. The calculation is performed when you click Calculate.

Insert an internal gear

  1. On the ribbon, click Design tab Power Transmission panel Spur Gear.
  2. On the Spur Gears Component Generator, Design tab:
    • Enter the values for the Common section.
    • Check the Internal check box in the Common section.
    • In the Gear 1 section, select Component from the list.
    • Enter the number of teeth for Gear 1.
    • In the Gear 2 section, select Component from the list.
    • Enter the number for teeth of Gear 2.
    Note: By default, Gear 2 has the higher number of teeth. It is considered a 'driving gear by' calculation. If you change the values and insert a higher number of teeth for Gear 1, it is considered a driving gear.
    • You do not need to select or specify any faces or planes in the Autodesk Inventor assembly.
  3. Click OK.
Note: During the edit, it is not possible to change which gear is driving. You can change number of teeth, but the driving gear must remain the same.

Insert a feature

  1. On the ribbon, click Design tab Power Transmission panel Spur Gear.
  2. On the Spur Gears Component Generator, Design tab:
    • Enter the values for the Common section.
    • In the Gear 1 section, select Feature from the list. The Cylindrical Face and Start plane commands are activated.
    • In the Autodesk Inventor assembly, select the cylindrical face and start plane. To insert the feature properly, it is necessary to have a user part with sufficient diameter that must be bigger than anticipated Outside Diameter.
    • In the Gear 2 area, select No Model from the list.
  3. Click OK.
Note: Any insertion combination is possible.

Calculate spur gear

  1. On the ribbon, click Design tab Power Transmission panel Spur Gear.
  2. On the Design tab, select the type of gears you want to insert (component or feature).
  3. Specify all known gear parameters - select appropriate Design Guide option from the drop-down list, and enter the values. You can change the values and units directly in the edit fields.
    Note: Click More in the right lower corner of the Design tab to open the More Options area, where you can select other options for your calculation.
  4. On the Calculation tab, select Method of Strength Calculation from the drop-down list, and enter values to perform the strength check.
  5. Click Factors to display a dialog box where you can change factors for selected Method of Strength Calculation.
  6. Click Accuracy to display a dialog box where you can change the accuracy settings.
  7. Click Calculate to perform the calculation.
  8. Calculation results are displayed in the Results area. The inputs that fail the calculation are displayed in red (their value does not correspond with other inserted values or calculation criteria). Reports of the calculation are displayed in the Summary of Messages area which is displayed after clicking the chevron in the right lower part of the Calculation tab.
  9. Click Results to display the HTML report with calculated values.
  10. Click OK.

Design a gear set based on known parameters

Use Spur Gears Generator to insert gear model into your assembly. Use following settings when you know all parameters and want to insert model only, not to perform any calculations or recalculate values.

You can insert one or two gears using these settings.

  1. On the ribbon, click Design tab Power Transmission panel Spur Gear.
  2. On the Design tab:
    • In the Common area, select Center Distance or Total Unit Correction options from the Design Guide drop-down list. According to your selected option from the drop-down menu, the options are enabled in the Design tab. These two options enable the most logical options to insert your gear model.
    • Set you desired values, such as Pressure Angle, Helix Angle, or Module.
    • In the Gear 1 and Gear 2 areas, select Component, Feature or No Model from the drop-down list. Specify numbers of teeth and place the gear set in the assembly, if desired.
    • Click More in the right-lower corner to insert more calculation values and criteria.
    • Click Calculate. Generator designs the gear set model based on entered parameters.
  3. Calculation results are displayed in the Results area. The inputs that fail the calculation are displayed in red (their value does not correspond with other inserted values or calculation criteria). Reports of the calculation are displayed in the Summary of Messages area which is displayed after clicking the chevron in the right lower part of the Calculation tab.
  4. Click OK to insert the gear set into the assembly.

Calculate spur gear for given center distance

  1. On the ribbon, click Design tab Power Transmission panel Spur Gear.
  2. On the Design tab:
    • In the Common area, select Module and Number of Teeth option from the Design Guide drop-down list.
    • Enter Desired Gear Ratio and Center Distance values, or select Cylindrical face for both gears in an assembly on position where gearing is placed (Center Distance is measured from Autodesk Inventor assembly). After placement selection of the gearing geometry a preview for gearing displays in the Autodesk Inventor window.
    • Click Calculate. Generator designs Module and Number of Teeth.
    • In the Common area, select Number of Teeth option from the Design Guide drop-down list. Change Module to upper or lower value to decrease or increase Number of Teeth.

      To decrease or increase number of teeth for first or second gear by one to achieve greater or smaller total unit correction, select Total Unit Correction from the Design Guide drop-down list, change Number of Teeth value, and click Calculate.

  3. On the Calculation tab, enter values to perform the strength check.
  4. Click Calculate.
  5. Calculation results are displayed in the Results area. The inputs that fail the calculation are displayed in red (their value doesn't correspond with other inserted values or calculation criteria). Reports of the calculation are displayed in the Summary of Messages area which is displayed after clicking the chevron in the right lower part of the Calculation tab.
  6. Click OK.

Edit spur gear

Worm Gear Design Calculation Pdf Creator
  1. Open the Autodesk Inventor assembly with the already inserted Design Accelerator spur gear.
  2. Select the spur gear, right-click to display the context menu and select the Edit Using Design Accelerator command.
  3. Edit the spur gear. You can change the number of gears, type of gear (component or feature), or recalculate values.
  4. Click OK.