Gradual Lead Angle Change

Introduction

This topic will explain the Gradual lead angle change option, describe where to find it, and provide links to related topics.

Gradual Lead Angle Change

The Gradual Lead Angle Change parameter is an angle offset used with the Lead Angle to Cutting Direction setting. During machining the gradual lead angle change value is divided by the number of cuts into gradual lead angle increments. This new angle increment is added to the lead angle value for every new cut. In the end, the final tool axis orientation is the Lead Angle to Cutting Direction value plus the Gradual Lead Angle Change value. For example, if the lead angle is 5 degrees and the gradual lead angle is 10 degrees, at the beginning of the toolpath the lead angle is 5 degrees. At the end of the toolpath the lead angle is 5 + 10 = 15 degrees. In the middle of the toolpath, the lead angle is 5 + (10 x 0.5) = 10 degrees.

 

Gradual Lead Angle Change is a special case parameter and it isn't expected to be used widely. For example, a side tilt angle of 40 degrees could be good to machine the top of a blisk (bladed disk) and you might want to reduce it to 10 degrees. The change is applied gradually for each contour. Here collision checking is not used because sometimes you would like to have a very detailed manual control.

 

 

Note:

• The first cut is tilted only with the Lead Angle to Cutting Direction value.
• This operation only works with tool axis strategy Tilted Relative to Cutting Direction.
• This option is also available as a Gradual Side Tilt Angle.
• You can use the Gradual Side Tilt Angle Change and Allow Flipping Side Direction. In this case with every cut, the Side Tilt Angle as well as the Gradual Side Tilt Angle Change alternate.

Navigation

To access Gradual lead angle change: 

 

1. The Gradual Lead angle change option can be found on the Tool axis control page.
   
   Click to view the options in the drop down next to Tool axis will... and select Be tilted relative to cutting direction.
   
   
2. With that option selected, the Side tilt definition options will become visible further down the page.
   
   
3. Click to view the drop down list and select any of the available options.
   
   
4. With that option selected, click the Advanced button below.
   
   The Advanced option for tilting relative to cutting direction dialog appears, with the Gradual lead angle change is in the first group.

Example

• If the Lead Angle to Cutting Direction is 10 degrees, the first cut has a 10 degree lead angle. The Gradual Lead Angle Change is 35 degrees. With 10 cuts you get an angle increment of 3.5 degrees. The second cut has a total lead angle of 13.5 degrees, the third is 17 degrees and so on. In the end the total lead angle is 45 degrees.