Automatic Detection System for Pre-bent Edge Shape as Mounted on JCOE Weld Pipe Production Line

In order to solve the problem of low measurement frequency and serious measurement deviation of the pre-bent edge shape quality data of the steel plate,as caused by the manual measurement.An automatic detection system of pre-bent edge shape is proposed as follows.A measuring mechanism is installed on both sides of the outlet roller table of pre-bending machine,and the high-speed contour laser sensor is arranged upon the support frame of the measuring mechanism so as to measure the shape of the pre-bent edge from the top to the bottom.The linear regression algorithm and least square methods are used to identify the straight line part and the middle arc part of the plate edge as well as the straight line part of the plate body of the pre-bent edge.And the chord height and straight edge length of the pre-bent edge are calculated by simulating the manual measurement method.The field application result shows that the said automatic measurement system is capable of automatic measurement of the pre-bent edge shape quality data with both the measurement accuracy and efficiency meeting the production requirements.