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摘要钢筋剪断机是按要求把钢筋剪切成在建筑或者工业工程中所需长度的专用机械，在建筑行业和工程机械中应用非常广泛。钢筋剪断机按传动方式可以分为机械传动和液压传动两种。机械传动式钢筋剪断机,工作机构大都采用电动机经一级三角带传动和二级齿轮传动减速后,带动曲轴旋转,曲轴推动连杆使滑块和动刀片在机座的滑道中作往复直线运动,使活动刀片和固定刀片相错而切断钢筋。
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传统机械传动式钢筋切断机，其剪切运动通常是由一曲轴连杆机构完成的。但是由于小功率剪断机机体体积比较小，因此机体内腔较为狭小，在装配曲轴连杆时会比较困难。尤其是如果在使用中机体内部发生故障需要文修时，拆卸曲轴连杆的过程会比较复杂，给文修保养造成很大的不便。在不改变设备功能的情况下，将曲轴连杆机构改成凸轮结构，将曲轴改为凸轮轴形式，改进后的凸轮结构可以直接从机体的注册孔中装入或取出，而不必拆卸连杆。34818
毕业论文关键词：钢筋剪断机 曲轴连杆 凸轮机构
Abstract Bar shearing machine is in accordance with the requirements of the shear reinforcement in the construction or industrial engineering required length of special machinery, in the construction industry and construction machinery is widely used. Reinforced shearing machine transmission mode can be pided into two kinds of mechanical transmission and hydraulic transmission. Mechanical transmission type steel bar shearing machine, working mechanism mostly uses the electric motor through a triangle belt transmission and secondary gear reducer, driven by the crankshaft, the crankshaft push rod so that the slider and blade in the frame of the chute for reciprocating linear motion, the movable blade and the fixed blade fault phase and cut steel.
The traditional mechanical transmission type of steel cutting machine, its shear movement is usually made of an axis linkage mechanism. But due to the small power cut machine volume is relatively small, so the body cavity relatively small, in the crankshaft connecting rod assembly will be more difficult. Especially if the internal failure in the use of the body need to repair, the demolition of the crankshaft connecting rod process will be more complex, causing great inconvenience to the maintenance. In does not change equipment function, the crankshaft connecting rod mechanism is changed into cam structure, change the crankshaft camshaft form, the improved structure of the cam can directly from holes in the body of the register is loaded in or taken out without having to remove the connecting rod.
Keywords:Bar shearing machine Crankshaft connecting rod Cam mechanism
目录
摘要 I
Abstract II
目录 III
1绪论 1
1.1概述 1
1.2目前国内钢筋剪断机的发展现状 1
1.3研究意义 1
1.4钢筋剪断机的工作原理 2
2电动机的选择 3
2.1计算剪切力 3
2.2剪断机匹配电动机功率理论计算 3
3减速器的设计 5
3.1传动比的分配与计算 5
3.2计算传动装置的运动和动力参数 5
3.3带的选择 6
3.4齿轮的设计及模数的选择 7
3.5轴径的选择和轴承的选择 12
3.6滚动轴承的选择计算 13
3.7标准件 14
4执行机构 15
5提高强度的几种方法 18
5.1提高机体的机械强度 18
5.2合理进行其他部件的结构设计 19