The Error Anslysis And Simultaneously Control Model Of CNC Gear-hobbing On Non-circular Gear

Non-circular gear is a machinery transmission component which works for variable transmission ratio. Comparing with traditional variable ratio transmission institutions, non-circular gear has its remarkable advantages in machinery and equipment manufacturing. It can replace many kinds of mechanism, such as linkage mechanism and cams mechanism. It is transmission component and also plays part in movement and control function at the same time. So its apply and research value is significant.CNC hobbing is a core part of machining non-circular gear. It has high precision and efficient productivity. Its machine is easy to adjustment and to produce the tools. In addition, this technology is an advanced method of processing helical non-circular gear. The aim of this article is to research Non-circular gear CNC Hobbing technologies further. It is based on the existing theory and key technologies.The simultaneously control is the most important part of non-circular gears CNC hobbing. According to the tooth profile forming principle of straight Non-circular gear, the article analyzes the complicated kinematic relation of the process. Through analysis and mathematical deduction, the article gives two mathematical models of interlock control programs. Two interlock control structures are designed by the electronic gear function and pulse template synthesis circuit template. According to the tooth profile forming principle of helical Non-circular gear, the article proposes four interlock control programs by helical gears meshing method and instrument rack oblique. After analyzing and mathematical deducting, four mathematical models of interlock control programs and four interlock control structures are designed.According to the tooth profile forming principle of helical Non-circular gear, the article propose four interlock control programs by helical gears meshing method and instrument rack oblique. After analysis and mathematical deduction, four mathematical models of interlock control programs and four interlock control structures are built.On the basis of error analysis of Cylindrical gear hobbing, this article analyzes errors of non-circular gear of CNC Hobbing from four aspects. The first is the accuracy of Non-circular gear transmission, the second is stationary of Non-circular gear transmission, the third is uniformity of load distribution and the last is uniformity of tooth gap. The theoretical analysis can provide the theoretical basement about improving the accuracy of Non-circular gear of CNC hobbing. To analysis hobbing machine spindle static and dynamic properties by the dynamic characteristics of the stiffness of the spindle, we can result the effecting of the stiffness of the spindle on hobbing error.