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205 条记录 (耗时 0.013 秒)

    Method for detecting defects using magnetic particles in a viscous fluid that restricts their mobility
    91.
    发明授权
    Method for detecting defects using magnetic particles in a viscous fluid that restricts their mobility 失效
    使用限制其移动性的粘度流体中的磁性颗粒检测缺陷的方法

    公开(公告)号：US3786346A

    公开(公告)日：1974-01-15

    申请号：US3786346D

    申请日：1973-03-06

    申请人： MAGNAFLUX CORP

    发明人： LORENZI D

    IPC分类号： G01N27/84 ,  G01R33/12

    CPC分类号： G01N27/84

    摘要： Method and composition for detecting defects in a magnetizable test piece which involves applying over the surface of the test piece a relatively viscous slurry of ferromagnetic flakes, preferably in an oily medium, the slurry being sufficiently viscous to restrict lateral mobility of the flakes while permitting rotary movement of the flakes, magnetizing the test piece, and thereafter inspecting the test piece to determine the existence of surface flaws denoted by rotation of the flakes due to reorientation thereof by any stray fields present at defects in the test piece.

    摘要翻译： 用于检测可磁化试件中的缺陷的方法和组合物，其包括在试验片的表面上施加相对粘稠的铁磁薄片浆料，优选在油性介质中，所述浆料足够粘稠以限制薄片的横向移动，同时允许旋转 片状物的移动，磁化试验片，然后检查试验片，以确定存在表面缺陷的表面缺陷，该表面缺陷是由于在试件缺陷处存在的任何杂散场由于其由其重新定向而转动的。

    Magnetic particle inspection apparatus wherein the accumulated particles close the indicator circuit
    92.
    发明授权
    Magnetic particle inspection apparatus wherein the accumulated particles close the indicator circuit 失效
    累积颗粒中的磁性颗粒检查装置关闭指示器电路

    公开(公告)号：US3668517A

    公开(公告)日：1972-06-06

    申请号：US3668517D

    申请日：1970-07-30

    申请人： UNITED STATES STEEL CORP

    发明人： ZEMBERRY WILLIAM L

    IPC分类号： G01N27/84 ,  G01R33/12

    CPC分类号： G01N27/84

    摘要： An automatic magnetic particle inspection apparatus for detecting a defect in the workpiece and for signalling the presence of the defect in the workpiece is disclosed. The apparatus has conveying means for supporting the workpiece, drive means connected to one of the conveying means and the apparatus for causing relative movement between the conveying means and the apparatus to convey the workpiece along a path of movement; magnetizing means disposed adjacent a path of movement of the workpiece and for creating lines of flux in the workpiece and fringe lines of flux adjacent the defect in an attraction zone; magnetic particles spray means disposed further along the path of movement of the workpiece for spraying magnetic particles on the magnetized workpiece to deposit the particles on the workpiece in a spray zone adjacent the attraction zone and to create a pile of the magnetic particles adjacent the defect in the attraction zone within the spray zone; and detecting and signalling means disposed further along the path of movement of the workpiece. The detecting and signalling means has a bi-pole detecting head which is spaced from the attraction zone a predetermined distance and has magnet means and a contact member for contacting the workpiece. The magnet means is operable to create lines of flux through one pole of the detecting head, the contact member, the workpiece, the pile of magnetic particles, the other pole of the detecting head to the magnet means to form the pile of magnetic particles and into a bridge across the predetermined distance. Signal means are employed for indicating the presence of the defect and control means are connected to the detecting head and the signal means and are energized by the bridge to actuate the signal means to indicate the presence of the defect.

    摘要翻译： 公开了一种用于检测工件中的缺陷并且用于表示工件中存在缺陷的自动磁粉检查装置。 该装置具有用于支撑工件的传送装置，连接到传送装置中的一个和驱动装置的驱动装置，用于使传送装置和装置之间的相对移动沿着运动路径传送工件; 磁化装置邻近工件的移动路径设置，并且用于在工件中产生磁通线，以及与吸引区中的缺陷相邻的磁通条纹线; 磁性粒子喷射装置进一步沿着工件的移动路径设置，用于将磁性颗粒喷射在磁化工件上，以将颗粒沉积在邻近吸引区的喷射区域中的颗粒沉积在工件上，并产生一堆邻近缺陷的磁性颗粒 喷雾区内的吸引区; 以及沿着工件的移动路径进一步设置的检测和信号装置。 检测和信号装置具有双极检测头，其与吸引区间隔预定距离并且具有磁体装置和用于接触工件的接触构件。 磁体装置可操作以通过检测头，接触构件，工件，一堆磁性颗粒的一个极，通过检测头的另一个磁极到磁体装置的一个磁极产生磁通线，以形成一堆磁性颗粒， 跨越预定距离的桥梁。 信号装置用于指示缺陷的存在，并且控制装置连接到检测头和信号装置，并由桥被激励以致动信号装置以指示缺陷的存在。