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    INSPECTION APPARATUS AND METHOD FOR INSPECTING A SHEET IN A PRESS
    6.
    发明公开
    INSPECTION APPARATUS AND METHOD FOR INSPECTING A SHEET IN A PRESS 审中-公开
    检验设备和检验压力机中纸张的方法

    公开(公告)号：EP3197615A1

    公开(公告)日：2017-08-02

    申请号：EP15790666.0

    申请日：2015-09-24

    申请人： SACMI - Cooperativa Meccanici Imola - Societa' Cooperativa

    发明人： BERGAMI, Stefano ,  ALBONETTI, Danilo

    IPC分类号： B21D28/06 ,  B21D28/26 ,  B21D43/00 ,  B21D43/02 ,  G01B11/00 ,  B21D51/44

    摘要： An inspection method (2) is provided for inspecting a sheet in a press (1), wherein the press (1) comprises a punching unit (4) which is suitable for receiving a sheet (2) provided with a plurality of printed portions (3) arranged in a regular manner according to a printing pattern and for cutting the sheet in dwell steps thereof, separating into several steps a plurality of printed discs. The method comprises: - providing abutting means (22, 23, 24) arranged upstream of the punching unit (4) to receive the sheet (2) to be cut and adjust the position of the sheet (2), - advancing in a first direction (Dl) the thus adjusted sheet (2) to the punching unit (4) to obtain the plurality of printed discs; - processing at least one acquired image of the sheet (2) to detect an arrangement of the printing pattern in the sheet (2); - comparing the detected arrangement of the printing pattern with a nominal arrangement of the printing pattern to obtain a shift of the printing pattern in the sheet (2) with respect to said nominal arrangement; - acquiring at least one image of the sheet (2) upstream of the abutting means (22, 23, 24) during advancement of the sheet (2) in a second direction (D2). To detect said arrangement of the printing pattern the method further comprises: - identifying a top edge (2a), a bottom edge (2b) and a side working edge (2c) of the sheet (2) and further identifying a top graphic mark (20), which is arranged in a top corner (18) defined between the top edge (2a) and the side working edge (2c), and a bottom graphic mark (21) which is arranged in a bottom corner (19) between the side working edge (2c) and the bottom edge (2b); - calculating a longitudinal shift and a top side shift of the top graphic mark (20) and a bottom side shift of the bottom graphic mark (21); and wherein said adjusting the position of the sheet (2) in said abutting means (22, 23, 24) comprises translating and/or rotating said sheet (2) as a function of said longitudinal shift, and/or said top side shift and/or said bottom side shift to position said printing pattern in said nominal position so as to obtain in said punching unit (4) printed discs in which each printed portion (3) is arranged in a desired position.

    摘要翻译： 本发明提供了一种用于检查压机（1）中的纸张的检查方法（2），其中压榨机（1）包括适于接收设置有多个印刷部分（2）的纸张（2）的打孔单元（4） 3）根据印刷图案以规则的方式排列，并且用于在其停留步骤中切割纸张，将多个印刷盘分成几个步骤。 该方法包括：提供布置在冲孔单元（4）的上游的接合装置（22,23,24）以接收待切割的片材（2）并调节片材（2）的位置， - 以第一 将由此调整的片材（2）朝向所述冲压单元（4）方向（D1）移动以获得所述多个印刷盘; - 处理所述片材（2）的至少一个获取的图像以检测所述片材（2）中的所述印刷图案的布置; - 将检测到的印刷图案的布置与印刷图案的标称布置进行比较，以获得薄片（2）中的印刷图案相对于所述标称布置的偏移; - 在片材（2）沿第二方向（D2）推进期间获取邻接装置（22,23,24）上游的片材（2）的至少一个图像。 为了检测印刷图案的所述排列，该方法还包括： - 识别片材（2）的顶部边缘（2a），底部边缘（2b）和侧部工作边缘（2c），并进一步标识顶部图形标记（ ，其设置在顶部边缘（2a）和侧部工作边缘（2c）之间限定的顶部角部（18）中，以及底部图形标记（21），其布置在底部角部（19） （2c）和底部边缘（2b）; - 计算所述顶部图形标记（20）的纵向移位和顶部移位以及所述底部图形标记（21）的底部移位; 并且其中所述调节片材（2）在所述邻接装置（22,23,24）中的位置包括根据所述纵向移位和/或所述顶侧移位和/或所述顶侧移位来平移和/或旋转所述片材 /或所述底侧移动以将所述印刷图案定位在所述标称位置，以便在所述打孔单元（4）中获得印刷盘，其中每个印刷部分（3）布置在期望位置。