曲柄摇杆式飞剪机设计.doc

PAGE IV 摘要 本飞剪机为曲柄摇杆式飞剪，其特点是将刀架作成杠杆形状，将其一端固定在曲柄轴的端部，另一端固定在摆杆上，使得曲柄轴转动时，刀架能够作平移运动，则令固定在刀架上的刀片能够作垂直或近似的垂直于轧件的运动，从而使得剪切断面能够比较平整。 本次设计主要考虑到近现代工业的发展，带钢的轧制速度逐渐提高，产品的尺寸精度要求日趋严格，对材料的剪切断面的平整度的要求越来越高等因素，在本次设计中对剪切力、剪切力矩、电动机的工作功率进行了计算，并根据此选取了符合工作要求的电动机。还对飞剪机内的齿轮的模数以及尺寸进行了计算，对曲轴进行了尺寸的确定以及进行了强度的校核。通过选材以及计算，使得设计的各零件的确定符合国家标准，使该次设计的飞剪机完全符合这次的设计要求，工作安全可靠。 关键词：曲柄摇杆式、剪切力、曲轴、校核 Abstract The flying shear is crank rocker- type, which is characterized by forming the knife rest into lever type, and fixing one end on jackshaft while the another on oscillating bar.So the knife rest can make translationmotion following the rolling of jackshaft which orders the blades fixed on the knife rest make vertical- rolling or approx vertical- rolling to get a smooth cut section. Allow for the development of modern industry, the improment of plate band rolling,the rising requirment of dimensional accuracy and the planeness of shearingarea，the shearing force and the shearing moment is calculated accurately as well as the operating power of electromotor,on the basis of which, appropriate electromotor was selected.Besides the modulus and size of gear in flying shear is calculated ,the size of the bent axle is confirmed and the strength is checked. All parts live up to national standard by means of selecting material and calculation,so The flying shear fit the design requirements totally,safety and reliable. Keywords: crank rocker, shear force, crankshaft, respectively 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc264617292 摘要 PAGEREF _Toc264617292 \h I HYPERLINK \l _Toc264617293 Abstract PAGEREF _Toc264617293 \h II HYPERLINK \l _Toc264617294 目录 PAGEREF _Toc264617294 \h III HYPERLINK \l _Toc264617295 第一章 绪论 PAGEREF _Toc264617295 \h 1 HYPERLINK \l _Toc264617296 1.1 冷轧带钢生产概况和发展方向 PAGEREF _Toc264617296 \h 1 HYPERLINK \l _Toc264617297 1.1.1冷轧带钢生产在国民经济中的地位 PAGEREF _Toc264617297 \h 1 HYPERLINK \l _Toc264617298 1.1.2飞剪机的基本介绍及发展情况 PAGEREF _Toc264617298 \h 1 HYPERLINK \l _Toc264617299 1.2飞剪机的工艺要求