Linear backlash-free tappet-drive

为了实现高动力学，机床的直线驱动系统应传递高力。同时，定位要尽可能准确。不同的驱动系统有特定的优点和缺点。已建立的机械动力传动系统，如滚珠丝杠和齿条和小齿轮传动，其主要问题是在传动系的间隙，降低了定位精度。为了补偿或避免反弹，需要额外的机械部件或额外的控制工程方法。此外，点或线形接触点限制了最大可传递力。此外，由于滚珠丝杠的长度相关刚性，其工作范围有限。作为现有系统的替代方案，提出了一种新型驱动系统，该系统无间隙，刚性增加，可用于任何长度的进给轴。新系统是一个齿条驱动与单独驱动和控制齿（挺杆）与直齿翼。这导致一个真正的表面接触之间的单齿和齿条，这使一个增加的动力传输。适当数量的单个牙齿和它们的排列可以确保系统中没有反弹。可能的实现是预先设计好的。在研究计划内，应设立一个可变测试台，以便测试各种机械和控制概念，并评估其潜力。这个新颖的概念为线性驱动系统提供了一种新的替代方案，在定位精度、最大力和刚度方面，对驱动单元的要求非常高。

Linear drive systems in machine tools should transmit high forces in order to achieve high dynamics. At the same time, the positioning should be as accurate as possible. Different drive systems have specific advantages and disadvantages. The established systems with mechanical power transmission such as ball screws and rack and pinion drives have the primarily problem of backlash in the drive train, which reduces positioning accuracy. In order to compensate for or avoid the backlash, additional mechanical components or additional control engineering approaches are required. Furthermore, the point or line shaped contact spots limit the maximum transmittable force. In addition, ball screws have a limited operating range due to their length-dependent rigidity. As an alternative to existing systems, a novel drive system is proposed which is backlash-free, has increased rigidity and can be used for feed axes of any length. The novel system is a rack drive with individually driven and controlled teeth (tappet) with straight tooth flanks. This leads to a real surface contact between the single tooth and the rack, which enables an increased power transmission. A suitable number of individual teeth and their arrangement can ensure freedom from backlash in the system. Possible implementations were designed in advance. Within the research project, a variable test bench shall be set up, which will allow various mechanical and control concepts to be tested and their potential to be assessed. The novel concept promises a new alternative for linear drive systems with very high demands on the drive unit in terms of positioning accuracy, maximum force and rigidity.