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Development of Vibration Diagnostic System for Improving Thread Machining Technology

开发振动诊断系统以提高螺纹加工技术

基本信息

批准号：
59850030
负责人：
YAGISHITA Hukuzo
金额：
$ 4.1万
依托单位：
Numazu College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1984
资助国家：
日本
起止时间：
1984 至 1986
项目状态：
已结题

项目摘要

A vibration analysis method was newly proposed which was paied special attention to the synchronous error between rotational motion of a workpiece and straight feed motion of a cutting tool, which directly caused lead error of a machined thread. The method was demonstrated on a threading machine and a thread grinding machine. The results are summarized as follows :1. A new vibration analysis method for thread cutting consists of torsional static characteristic test, torsional dynamic characteristic test, intermittent cutting test, idle running test and thread cutting test.2. By applying torsional dynamic characteristic test by impulsive cutting, torsional natural frequency between a cutting tool and a workpiece can be obtained. The torsional natural frequency can be identified by intermittent cutting test.3. Synchronous error which was recorded during idle running and thread cutting was processed by an FFT ( fast Fourier transform ) analyzer. By consulting a schematic drawing of a rotational transmission mechanism which is contained in a tested threading machine, specific parts can be revealed which cause a lead error of a machined thread based on frequency components of synchronous error processed by an FFT analyzer.4. A new vibration analysis method for thread grinding consists of idle running test, rapidly stopping test and thread grinding test.5. After synchronous error during idle running and thread grinding was processed by the same manner as the case of threading machine, specific parts can be revealed which cause a lead error of a ground thread. In the case of a tested thread grinding machine, it was ascertained that a lead screw for driving a traverse table mainly caused a lead error during one pitch which was remarkably recognized by lead error measuring test.6. A newly proposed vibration analysis method for thread cutting and thread grinding can be effectively applied to diagnose other thread production equipments which are used in many machine shops.

提出了一种新的振动分析方法，该方法特别关注工件的旋转运动与刀具的直线进给运动之间的同步误差，该误差直接导致被加工螺纹的导程误差。该方法在螺纹加工机和螺纹磨床上进行了验证。主要研究结果如下：1.提出了一种新的螺纹切削振动分析方法，该方法由扭转静态特性试验、扭转动态特性试验、断续切削试验、空转试验和螺纹切削试验组成.通过脉冲切削扭转动态特性试验，可以得到刀具与工件之间的扭转固有频率。通过间歇切削试验可以识别出扭转固有频率.利用快速傅里叶变换分析仪对空转和螺纹切削过程中记录的同步误差进行了处理。通过参考被测试的攻丝机中包含的旋转传动机构的示意图，可以基于由FFT分析器处理的同步误差的频率分量来揭示引起加工螺纹的导程误差的特定部件。4.提出了一种新的螺纹磨削振动分析方法，包括空转试验、急停试验和螺纹磨削试验.在空转和螺纹磨削期间的同步误差通过与攻丝机的情况相同的方式处理之后，可以揭示引起磨削螺纹导程误差的特定部分。在被测螺纹磨床的情况下，确定了用于驱动横移工作台的导螺杆主要在一个螺距期间引起导程误差，这通过导程误差测量测试显著地识别。本文提出的一种新的螺纹加工和螺纹磨削振动分析方法，可有效地应用于许多机械加工车间的其它螺纹加工设备的故障诊断。