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公开(公告)号：US20220347905A1
公开(公告)日：2022-11-03
申请号：US17772725
申请日：2020-10-30
发明人： Keita Hihara , Soma Mitani , Masato Kawakita
摘要： An abnormality detection apparatus for detecting an abnormality of a ball screw provided in an injection molding machine includes: a vibration sensor configured to detect vibration of the ball screw; and a computation unit configured to detect an abnormality of the ball screw based on information related to a distribution of frequency components obtained by frequency analysis of a vibration intensity detected by the vibration sensor, and information related to a distribution of frequency components obtained by frequency analysis of a vibration intensity detected when the ball screw, which is normal, operates.
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公开(公告)号：US20220402184A1
公开(公告)日：2022-12-22
申请号：US17772723
申请日：2020-10-30
发明人： Takashi Ochiiwa , Soma Mitani , Masato Kawakita
IPC分类号： B29C45/76
摘要： An abnormality detection apparatus for detecting an abnormality of a ball screw provided in an injection molding machine includes a current sensor configured to detect an alternating current of a motor for applying a driving force to the ball screw; and a computation unit configured to detect an abnormality of the ball screw based on information related to a distribution of frequency components obtained by frequency analysis of an alternating current detected by the current sensor, and information related to a distribution of frequency components obtained by frequency analysis of an alternating current detected when the ball screw, which is normal, operates.
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公开(公告)号：US12083726B2
公开(公告)日：2024-09-10
申请号：US17772725
申请日：2020-10-30
发明人： Keita Hihara , Soma Mitani , Masato Kawakita
CPC分类号： B29C45/76 , G01M99/00 , G01P15/00 , B29C2945/76163 , B29C2945/76187 , B29C2945/76451
摘要： An abnormality detection apparatus for detecting an abnormality of a ball screw provided in an injection molding machine includes: a vibration sensor configured to detect vibration of the ball screw; and a computation unit configured to detect an abnormality of the ball screw based on information related to a distribution of frequency components obtained by frequency analysis of a vibration intensity detected by the vibration sensor, and information related to a distribution of frequency components obtained by frequency analysis of a vibration intensity detected when the ball screw, which is normal, operates.
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