關于三輥連軋管機孔型調節(jié)方法的討論

Discussion on Methods for Pass Adjustment of Three-roll Mandrel Mill

摘要: 簡要介紹了當今最具代表性的兩種三輥連軋管機各自不同的孔型調節(jié)方式。在簡化相關邊界條件的前提下,以Φ168mm PQF機組和Φ159mm FQM機組為對象,解析了在軋制典型規(guī)格產品時兩種機型分別在擺動壓下和徑向壓下調節(jié)后孔型各關鍵點的位移以及孔型圓心的偏移情況。分析了兩種不同的孔型調節(jié)方式對孔型精度及荒管壁厚精度的影響程度。

Abstract: Briefed in the paper are the two pass adjustment methods respectively for the two currently most representative three-roll MPMs.With relevant boundary conditions simplified,and the Φ168 mm PQF and the Φ159 mm FQM taken as the study objects,analysis is conducted on displacements of the key pass points and shifting statuses of the pass centers of the mills after swing screwdown and radial screwdown,when rolling pipes with typical sizes.Also analyzed are the extent of influences by the said two different pass adjustment types on the pass accuracy as well as the pipe wall thickness accuracy.