本发明提供了一种JCO钢管成型调型工艺，属于钢管制造技术领域，包括确定压制道次数，计算每道次的理论压下量和理论弦高，所述理论弦高为测量弦对应的弦高，所述测量弦为压制成型的内弧对应的弦，对钢板进行压制，每道次压制完成后测量与所述理论弦高对应的实际弦高，并根据所述实际弦高与所述理论弦高的差值对所述理论压下量进行调整，直至完成所有道次的压制；本发明提供的JCO钢管成型调型工艺，提高了JCO工艺制成的管型的几何尺寸精度且提高了调型效率。

The invention provides a forming and adjusting process of JCO steel pipe, which belongs to the technical field of steel pipe manufacturing, including determining the number of pressing passage, calculating the theoretical amount of pressing down of each passage and the theoretical chord height, the theoretical chord height is the chord height corresponding to the measuring string, the measuring string is the chord corresponding to the inner arc of pressing, pressing the steel plate, After each pass of pressing, measure the actual string height corresponding to the theoretical string height, and adjust the theoretical pressure down amount according to the difference between the actual string height and the theoretical string height until the completion of all passes of pressing; The JCO steel pipe forming and adjusting process provided by the invention improves the geometric dimension accuracy of the pipe made by the JCO process and improves the shaping efficiency.