KISSsoft Tutorial-Bevel Gears

1 Starting KISSsoft

1.1 Starting the software

Once you have installed and activated KISSsoft either as a test or licensed version, follow these steps to call the KISSsoft system.Start the program by clicking "Start?Program FilesKISSsoft 03-2011?KISSsoft". This opens the following KISSsoft user interface:

Figure 1.1 Starting KISSsoft, initial window

1.2 Starting the calculation module

Start the "Bevel and hypoid gears" calculation module by double-clicking the corresponding

entry in the "Modules" window in the top left-hand corner of the main window.

Figure 1.2 Selecting the "Bevel and hypoid gears" calculation module from the "Modules" window

2 Introduction

There are various different types of bevel gears, and every design has special features that must be taken into consideration.This tutorial describes these various designs and provides information about how they can be analyzed in the KISSsoft system.

2.1 Differential bevel gears

Differential bevel gears are usually straight toothed. For manufacturing reasons, their construction is usually very different from the theoretical design. Therefore, we recommend you use a different approach to analyze an existing set of bevel gears from a drawing.

The drawings for differential bevel gears often contain very little theoretical data. Usually, the drawing does not show a theoretical external tip diameteror an external reference diameter

Instead it shows the finished external diameter so that the external reference diameter must

be estimated. It is also often not clear whether the module is the middle or external module. However, this can be checked quite easily withThe transverse and normal modules are identical because the gear is straight toothed.

2.2 Calculating geometry in KISSsoft

1. In the "Geometry"→"System data" tab, select the "Standard, fig 2 (Tip, Pitch and Root apex NOT in one point)" option.This type allows you to input tip and root angles (see Figure ).

Figure 2.1 Selecting "Standard, fig 2" type

2. Input "Reference diameter gear 2 (outside)" or "Normal module (in middle)" according to the drawing. If the values are not specified on the drawing, use the graphics on the drawing to determine them.

3. Input the "Pressure angle" and "Number of teeth" in accordance with the drawing.

4. Input the "Facewidth". If the facewidth is not predefined, you must measure it on the drawing. Here, use the reference cone length.

5. Input the "Profile shift coefficient" and "Tooth thickness modification factor"= 0.

6. Before you can input the "Tip and root angle gear 2", you must first run the calculation withor press "F5" to calculate the reference cone angle. Right-click on "Convert" to input the tip and root angle. Then click "Calculate" to calculate the tooth angle and

include this in the calculation (see Figure ).

Figure 2.2 Input and convert tip and root angle

7. You do not need to enter anything under "Manufacturing data" because this data will be ignored

8. Either clickor press "F5" to run the calculation. To generate and open the report, clickor press "F6". You can then compare the results in the report with the default data on the drawing, for example the angle (see Figure ).

Figure 2.3 Bevel gear report, section 1 tooth geometry

2.3 Calculation of static strength

Differential bevel gears are usually calculated with static load because they usually operate in static applications. The static calculation only takes root fracture due to bending into account.

1. In the "Strength"→"System data" tab, select the "Differential, static calculation" calculation method (see Figure )

Figure 2.4 "Differential, static calculation" strength calculation

2. Input performance/torque/rotation data using the default values

3. Differential bevel gears are normally used with several strands. Check and input the "Number of strands" under "Pair data"→"Details". The default value is 2, because this

is the most common situation.

4. Either clickor press "F5" to run the calculation. To generate and open the report, clickor press "F6".

2.4 Inputting an existing set of bevel gears from a Gleason data sheet

To analyze an existing set of bevel gears (with spiral toothing) using drawings or Gleason datasheets ("Gleason dimension sheets"), follow this procedure.

Bevel gear drawings and the Gleason dimension sheet usually contain precise, comprehensive

information about intermeshing. In KISSsoft, use the "Conversion from GLEASON data sheets" function to input this data. The required data is

2.4.1 Calculating the geometry

1. In the "Geometry"?"System data" tab, select the "Constant slot width" or "Modified

slot width" type (see Figure).

Figure 2.5 Selecting "constant slot width" type or "non constant slot width" type

2. Click on "Conversion from GLEASON data sheets" to the right of the type and input the

data (see Figure and Figure ).

Figure 2.6 Conversion from GLEASON data sheets

Figure 2.7 Inputting data from Gleason datasheets

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