毕业设计（论文）四辊方管轧机的设计（全套图纸）.docVIP

PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT 1摘 要方管，顾名思义，它是种方形体的管型，很多种材质的物质都可以形成方管体，大多数方管以钢管为多数，多为结构方管，装饰方管，建筑方管等。方管，是方形管材的一种称呼，也就是边长相等的的钢管。是带钢经过工艺处理卷制而成。一般是把带钢经过拆包，平整，卷曲，焊接形成圆管，再由圆管轧制成方形管然后剪切成需要长度。一般是50根每包。用于大直径热轧无缝钢管生产的二辊式定径机虽然技术成熟，但由于受孔型半径差大、孔型侧壁对轧件有效高、外径尺寸精度较低；由于内传动三辊式定径机的每个几家都需要两对规格较大的螺旋锥形齿轮，但国内加工该试论困难，而外传动三辊定径机则需要在底下布置电机，基建投资较大。为了克服二辊式定径机生产钢管尺寸精度低的弱点，基于目前的条件，在借鉴热轧方矩形管和焊管生产定径技术的基础上，设计出用于无缝钢管生产的四辊式定径机。关键词：定径机；方管；无缝钢管；设计计算全套图纸加153893706 PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT 2AbstractTubes, as the name suggests, it is a kind of square body tube type and material of many kinds of material can form a square body, most of the square tube with steel tube for most, square pipe structure, decoration Square, building square.?The square is a square, called pipes, is equal to the length of steel pipe.?The strip is made by the process of processing volume.?Generally, the strip is cut down, flat, coiled, welded round tube, then rolled into square tube by tube and cut into length..?Generally 50 per pack.For large diameter hot-rolled seamless steel tube production and type fixed size machine although the technology is mature, but because by groove radius difference, side wall of pass of rolling high, precision of the outside dimension lower; due to the transmission of the three roller set size machine each several need two pairs of specifications larger spiral bevel gear, but discussion on the difficulties of domestic processing and outside three roll sizing mill is required under motor arrangement, infrastructure investment is large.In order to overcome two roll top production pipe size precision low weakness. Based on the present conditions, in reference to the hot rolling rectangular pipe and welded pipe production sizing technology based on Design for seamless steel tube production of four roller sizing machine.Key words: sizing mill;Square tube ;Seamless steel tube ; design calculation 目 录TOC \o 1-3 \h \u HYPERLINK \l _Toc27271 摘 要 PAGERE