Software for 3,4,5-AXIS CNC MACHINING OF gears
Order online or:
1. Contact us with your gear data or pdf drawings. Sample drawing.
2. Purchase 3d gear tooth software. Sample IGES file.
3. Cut spiral bevel gears on 3,4-axis CNC milling machines. Example of 3-axis cutting.
We supply software and 3-dimensional IGES models ( sample 1, sample 2, sample 3, sample 4) of spiral bevel and other gears. Our customers use 3d models to program 3.4,5-axis CNC machines to cut spiral bevel gears (sample 1_1, sample 3_1)
SPIRAL BEVEL GEAR TOOTH Contact Pattern
Tooth contact pattern plays an important role in spiral bevel gear manufacturing. Contact pattern is the area on the active tooth surface where the pinion tooth rolls/slides around the gear tooth. There are two types of the tooth contact pattern: immediate contact pattern and combined contact pattern. The immediate tooth contact pattern is the area where pinion tooth contacts the gear tooth in each particular moment of time. 
During rotation, the immediate tooth contact will move over the tooth and it will generate the combined tooth contact (contact pattern). The position, location, form, and direction of movement of the immediate tooth contact may significantly change the life of the gear.
Our spiral bevel gear tooth contact simulation software calculates the immediate tooth contact and the combined tooth contact as well. The calculation results show how the immediate contact moves along the working tooth and produces the combine tooth contact pattern. The same contact can bee seen on a rolling tester. We calculate the tooth contact based on the original design or based on the inspection result from a real gear. Our advanced and accurate method is based on scanning the active tooth surfaces of the gear and the pinion on a CMM machine. The CMM would measure co-ordinates of many points on the tooth surfaces. Then, software builds a 3-dimensional CAD model and calculates the immediate and combined contact patterns.
Before introduction of DDS Tooth Contact Analyzes (TCA) software in 2002, it was impossible to inspect the immediate tooth contact on spiral bevel gears.
Images below show an example of tooth contact simulation on one of our gear set.
Click on image for higher resolution:
1. Nominal shaft position. No shaft misalignment.
2. Horizontal misalignment. Mounting distance error.
3. Vertical misalignment. Hypoid offset.
4. Angular misalignment. Error in angle between shafts.
Thanks to introduction of Direct Digital Simulation method in 1986 in Russia and later in Sweden, Japan, USA and in China, accurate spiral bevel gear tooth contact pattern calculation has become available.
