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Numerically Control of Servo-Spindle for Machine Tools by Two-phase Type PLL Method

两相式PLL法机床伺服主轴的数控

基本信息

批准号：
02650172
负责人：
EMURA Takashi
金额：
$ 1.22万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650172/
关键词：
PLL Phase Locked Loop Mechatronics Servomechanism Direct-Drive NC Gear Grinding Machine NC Gear Manufacturing Machine NC Machine Tool

项目摘要

Recently, Machine tools have been rapidly changing to NC machines, however, it has been difficult to make NC gear cutting or grinding machines. For example, NC hobbing machines were not suitable for making high precision gears as compared with full-mechanical ones. To overcome the difficulty, T. Emura, the head investigator of this project, tried to make a high precision and high speed servo-spindle suitable for gear manufacturing machines using the direct-drive techniques which were obtained through the investigation about waudng robots. The two-phase type PLL(phase-locked loop), proposed by T. Emura, was applied to controlling the servo-spindle in order to obtain high precision and high stiffness rotational motion.The summary of this research results-are as follows. we made the servo-spindle which was composed of a build-in motor, a magnetic scale and a dynamic balancing mechanism necessary for high speed rotation(maximum 12, 000 rpm). In order to improve the adaptivity to the periodic disturbance, the repetitive control method were used. In addition, a meshing mechanism is usually necessary for NC gear grinding machines to check and correct the relative displacement between the tool and the work. We proposed a new meshing method using image processing and proved that it is very useful.As a result of the experiments using the NC gear grinding machine using the servo-spindle controlled with the two-phase type PLL, it was proved that we can very quickly get high precision gears whose cumulative error is less than 10".

近年来，机床迅速向数控机床转变，然而，制造数控齿轮加工机床或磨齿机一直是一件困难的事情。例如，与全机械滚齿机相比，数控滚齿机不适合制造高精度的齿轮。为了克服这一困难，本项目的首席研究员T.Emura试图利用通过对WAWING机器人的研究获得的直接驱动技术，制造出适合于齿轮加工机床的高精度、高速的伺服主轴。为了实现高精度、高刚度的回转运动，采用T.Emura提出的两相锁相环对伺服主轴进行控制。我们制造了一个由内置电机、磁秤和动平衡机构组成的伺服主轴，这是高速旋转(最高12,000转/分)所必需的。为了提高系统对周期扰动的适应性，采用了重复控制方法。此外，数控磨齿机通常需要一个啮合机构来检查和修正刀具和工件之间的相对位移。在两相锁相环控制的伺服主轴数控磨齿机上进行的实验结果表明，该方法可以快速得到累积误差小于10“的高精度齿轮。