论文部分内容阅读
φ340mm石油套管是我厂于1979年为满足用户需要而试制成功的一个超设计的新品种。这个新品种试制中,热轧管车间用正公差轧制的所轧出的管子除少量是负公差以外,用正公差轧制的管子在热轧车间定径机上定径时,经轧辊定径后出现槽痕和挤压绉皮,致使管端车丝时产生平扣或断扣的废品较多。为了保证产品质量,因此决定采用管加工车间的300/200吨管端定径机,使管子端部在冷状态下进行定径。石油钻井用套管要求车丝质量较高,既要保证联接强度,又要保证密封性能,车丝尺寸则要求管体必须在正公差的外径范围内。我厂大型和中型周期轧管车间的
φ340mm oil casing is my factory in 1979 to meet the needs of users trial success of a super-design of new varieties. In the trial production of this new product, except for a small amount of negative tolerance, the pipe rolled by the positive tolerance rolling in the hot rolling pipe mill is dimensioned by the diameter of the roller when calibrating the pipe with the positive tolerance rolling in the sizing mill of the hot rolling plant, After the emergence of groove marks and squeeze crepe, resulting in tube-side when the flat-rolled or broken buttons produce more scrap. In order to guarantee the quality of the products, it was decided to adopt the 300/200-ton pipe end sizing machine in the pipe processing workshop to make the pipe ends be sizing in the cold state. Drilling oil casing with high quality requirements of the wire, it is necessary to ensure the strength of the joint, but also to ensure the sealing performance, the size of the wire requires the tube body must be within tolerance diameter range. I plant large and medium-cycle rolling workshop