CAJ | 학술논문

电磁夹具是铁磁零件加工中常用的工艺设备.大型和小型器件面磨削是将工件固定吸附在磁盘上加工的,因此磨削完毕后工件的残余磁性很大.器件上剩磁的大量存在,会使仪器检测时的检测值产生偏差,影响着产品的加工质量.这里提出一种基于市电的轴承退磁系统设计.该系统是一个涵盖了可控硅,单片机,光耦以及放大器的电路系统,利用放大器变换过零信号波形,然后通过单片机采集交流电的电压过零点,在经过光耦隔离升压后控制可控硅的导通与关闭,达到电压的交互衰减变化,实现器件的退磁效果.
전자협구시철자령건가공중상용적공예설비.대형화소형기건면마삭시장공건고정흡부재자반상가공적,인차마삭완필후공건적잔여자성흔대.기건상잉자적대량존재,회사의기검측시적검측치산생편차,영향착산품적가공질량.저리제출일충기우시전적축승퇴자계통설계.해계통시일개함개료가공규,단편궤,광우이급방대기적전로계통,이용방대기변환과령신호파형,연후통과단편궤채집교류전적전압과영점,재경과광우격리승압후공제가공규적도통여관폐,체도전압적교호쇠감변화,실현기건적퇴자효과.
Electromagnetic fixture is the common technique equipment in ferromagnetic parts machining. Since the surface grinding of the large and miniature devices takes the workpiece fix and adsorb on the disk to machining,the residual magnetism of the workpiece after grinding is great,which makes the testing value tested by the instruments have a deviation,and affects on the machining quality of the products. A design of AC-based bearing demagnetization system is presented. This system is a cir-cuitry which covers of silicon controlled rectifier,single chip microcomputer,opto-coupler and amplifier. The zero-crossing sig-nal waveform is transformed by the amplifier,then the voltage zero crossing point of alternating current is acquired by single chip microcomputer,and the breakover and turn-off of the silicon controlled rectifier are controlled after opto-coupler isolation and voltage boost. The interactive attenuation change of the voltage was achieved,and the demagnetization effect of the devices was realized.