Posted 28 Dec 2010 19:48
Seamless steel pipe rolling mill rolling process is the main product quality uniform wall thickness. Uneven wall thickness is a horizontal strip uniform wall thickness, in the follow-up process can be improved, but not completely eliminated. Rolling the main process equipment rack by the front, the main mill, detached body into. Rolling mill center line center line determined by the master. Centerline of the main mill on the body determined by the front desk of the bearing mandrel and roller capillary height, the machine mandrel support the position of the rack, V-guide and guard height, and off the machine center line, detached after also will determine the height of roller. As devices continue to use the Church on the copper mill slider also will wear a long time will affect the accuracy of the mill, resulting in a decline in product precision, uniform wall thickness produced by this time adjust the means by can not be eliminated, and need to re-check of rolling centerline. Germany SMSMeer Company Pipe Mill MPM and PQF are designed for the organization dedicated to ensure that the center line of the main mill center line of the same rack, and other auxiliary equipment adjusted accordingly. MPM MPM units in the organization of the Anshan Iron and Steel Co., Ltd. Seamless Steel Tube Plant 159mmMPM Pipe Mill (from SMSMeer company introduced) in the private sector by the middle of the frame and measuring apparatus composed of two parts. When first put on the measuring instruments placed in the entrances and exits at both ends of the rolling mill line, entrance light to detect the lens installed in the export, import and export points in a line adjustment. On the rack in the frame similar to the structure and can be installed within the arch. Adjustment of the frame and enters and exits the measuring point, to three o'clock in a line, which can guarantee the same chassis center line and rolled Zhongxin Xian-by-frame Yici equipment to complete the operation. The arch of the method can guarantee the accuracy of equipment, but the rack did not do measurements. In the actual production to take "pressure lead" approach, Bahrain rack, manually turn the mill operation, the pre-prepared lead weights on the shoulders of roller ran over Taiwan, and then measured the thickness after rolling of lead weights can be obtained roll gap value, the value compared with the set value after the correction accordingly. The method is simple, but the error is larger, measuring accuracy is not high. End mills are sometimes encountered in checking the centerline can not solve the shortage problem of uneven wall thickness, which was mainly due to the copper roller bearing box slider wear occurred, resulting in rolling center line "of the No", this bearing housing needs to be replaced when the copper slider. MPM PQF units in the organization of the Anshan Iron and Steel Co., Ltd. Seamless Steel Tube Plant 177mmPQF Pipe Mill (from SMSMeer company introduced) in the arch of, and MPM MPM similar units, but also designed the pass station used to measure the wear of the rack assembly and the errors resulted from processing to ensure the accuracy of pass. Frame processing is completed, each measuring station in the pass roller assembly and wear, and then send messages to the rolling unit to amend the method to ensure the accuracy of Mill St. Paul and the rack. Pipe Mill in MPM there is no similar right in the body, it roll bearing box of the unit block of copper caused by wear and installation errors can not be measured, can not ensure high-precision pass. Recommended Pipe Mill in the design of MPM technology needs from the point of view, consider designing a similar pass stations to ensure the rolling center line and center line of the same rack.