Gear Design Software

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ZAKGEAR Group
About Us
We design and develop advanced software for gear related applications

      Our software utilises powerfull Direct Digital Smulation method proposed by Dr. Stepan V. Lunin in 1986. We have sucsesfully developed numerouse custom software products reletad to different gear applications including software for 3-dimentional mathematical modeling of large spiral bevel gears that are commonly used on cone crushers, oil rig rotary tables, and in other applications. We have provide valuble assistance to different companies like Overton Gear in Addison, IL, to Gildmeister in Germany, and to other companies in the US and Europe in education about CNC gear manufacturing and practical CNC programming for manufacturing of Gleason and Klingelnberg identical spiral bevel gears.
    In cooperation with Spiral Bevel Co provides assistance in design of large spiral bevel gears. While designing of a large spiral bevel gear it is critical to optimize all the parameters of the gear on a computer model before producing the real gear. Large spiral bevel gears are very expensive to manufacture due to limited availability of the gear cutting machines. There are just 6 gear cutting machines in the US that can produce spiral bevel gears larger than 50" in diameter. Three 100-inch Gleason machines and two 80-inch Klingelnberg machines are located in Illinois and belong to two companies. One large 675 Gleason 100-inch machines is in operation in Texas. The six available machines are capable to produce one gear set a week each, which comes to total of 300 gear sets a year. In order to speed up production of the large gears the owners of Gleason and Klingelnberg spiral bevel gear machines use CNC milling for rough cutting of the tooth, so the gear generating machine cuts the gear faster. Rough cutting allows reduction of cutting time for about 50%. However, the geometry of the CNC cut remains poor if DDS technology is not used. Also, without DDS technology, the rough cutting needs to be finished on gear machines if the gear requires hard cutting after case hardening.
                                                         
    Our software can provide high resolution 3-dimensional simulation of gear tooth geometry and gear tooth contact.
Our design software calculates exact 3-dimensional geometry of spiral bevel gear. The software calculates x,y,z co-ordinates and i,j,k normal vectors on a number of points on the tooth surface. Unlike the traditional software, for example from Gleason, our software calculated the co-ordinates of the points that cover the entire tooth including the important area of the tooth root. The density of the points and the shape of the mesh can be selected depending on the application. However, a rectangular mesh is more desirable for CNC programming and stress calculation. The accuracy of calculation can be selected. The higher accuracy would require more time for calculation. In practice, the calculation time of the entire tooth surface with 2000 points is a few seconds.
Because of the complicity of the tooth geometry, software was always very critical for manufacturing of spiral bevel gears. Today, companies with better spiral bevel software are the winners on the competitive market. There are three important steps in spiral bevel gear manufacturing that require software: design, machine summary, and Tooth Contact Analysis (TCA).
       Spiral Bevel Co has adopted Direct Digital Simulation (DDS) method, as an underlying mathematical algorithm for writing of software. DDS method has advantages compare to the traditional differential geometry method that is used in software form, for example, Gleason or from Klingelnberd. The key advantages of the DDS modeling method versus traditional method are: reduced cost of calculation, ability to calculate complex tooth geometry, higher accuracy of tooth geometry calculation, higher accuracy of tooth contact simulation, and higher resolution of visualization.