钢坯冲剪机的设计论文与研究设计论文.doc

(此文档为word格式，下载后您可任意编辑修改！) 硕士毕业论文 题 目 ：钢坯剪切机的结构设计与研究 专 业 学 生 指 导 教 师 答 辩 日 期 摘 要 曲柄活连杆式剪切机，是一种新型的上切式剪切机，使用日渐广泛，是目前钢坯剪切机中剪切次数较高的一种型式。它与老式曲轴连杆剪切机不同的主要特点在于连杆下端不与上刀架固定铰接，只在剪切时连杆才摆正位置推动上刀架下降。 该剪切机主要是用小气缸操纵机构代替原始的牙嵌式离合器，保证工作时上刀架的升降、曲轴的旋转与连杆的推进步调一致。其工作原理为电动机通过带轮和齿轮两级传动将运动传递到曲轴，在连杆和气缸链接的杠杆的共同作用下实现刀架的上下移动。本文对曲轴活连杆上切式剪切机的用途、工作原理进行了分析，确定其总体设计方案，并对传动机构、剪切力、刀片、曲轴、滑动轴承、气缸和联轴器进行了详细的设计计算和校核，最后对其进行了必要说明，并进行了三维建模。 关键词：曲柄活连杆剪切机；结构设计；上切式；传动方案； Abstract The crankshaft connecting rod shears is a kind of new type up-cut shears, which is increasingly widely used. The crankshaft connecting rod shears is a type of billet shear machine with high cutting number of times .It is different from the old crankshaft- connecting rod shearing machine by main characteristic which is the lower connecting rod is not on fixed hinge with upper tool post, only when shearing the connecting rod was positioned to push down the upper tool post. The key of the shear is to use small cylinder control mechanisms replace the jaw clutch, ensuring that the lift of upper tool post and the rotation of the crankshaft are in step with the propulsion of connecting rod. Its working principle is that the motor delivers movement by double stage drive of pulley and gear,the tool post moves up and down under the common role of connecting rod and lever link to the cylinder. In addition, by analyzing the use and working principle of the crank-connecting rod shear machine, determine the transmission scheme. Besides carry the detailed design and calculation on the transmission mechanism, shear force, blades, crankshaft, bearing, cylinder and coupling and give the necessary instructions. Finally, made a 3d modeling. Key Words: the crankshaft connecting rod shears,structure design, up-cut shears, the transmission scheme. 目 录 摘 要 I Abstract II 目 录 III 第1章 绪论 1 1.1课题背景 1 1.2课题来源、目的及意义 1 1.3国内外研究现状 2 1.4主要研究内容 5 第2章 总体方案设计与分析 7 2.1引言 7 2.2