文档介绍：摘要
在机械加工过程中,板材切割常用方式有手工切割、半自动切割机切割及数控切割机切割。手工切割灵活方便,但手工切割质量差、尺寸误差大、材料浪费大、后续加工工作量大,同时劳动条件恶劣,生产效率低。半自动切割机中仿形切割机,切割工件的质量较好,由于其使用切割模具,不适合于单件、小批量和大工件切割。其它类型半自动切割机虽然降低了工人劳动强度,但其功能简单,只适合一些较规则形状的零件切割。数控切割相对手动和半自动切割方式来说,可有效地提高板材切割地效率、切割质量,减轻操作者地劳动强度。目前在我国的一些中小企业甚至在一些大型企业中使用手工切割和半自动切割方式还较为普遍。目前,我国机械工业钢材使用量已达到3亿吨以上,钢材的切割量非常大;随着现代机械工业的发展,对板材切割加工的工作效率和产品质量的要求也同时提高。因而数控切割机的市场潜力还是很大、市场前景比较乐观。数控火焰切割机,切割具有大厚度碳钢切割能力,切割费用较低,但存在切割变形大,切割精度不高,而且切割速度较低,切割预热时间、穿孔时间长,较难适应全自动化操作的需要。它的应用场合主要限于碳钢、大厚度板材切割,在中、薄碳钢板材切割上逐渐会被等离子切割代替。本文主要包括对各类切割机的发展介绍,悬臂式火焰切割机的主体结构设计以及传动装置的设计计算几部分。
关键词:切割机;发展;结构设计;设计计算
ABSTRACT
Commonly used in the process of machining, sheet cutting method with manual cutting, semi-automatic cutting machine cutting and nc cutter cutting. Flexible cutting by hand, but hand cutting quality is poor, size error is big, big material waste, subsequent processing workload is big, poor working conditions at the same time, the production efficiency is low. Semi-automatic cutting machine, profiling cutting machine, cutting the workpiece quality is better, because it is used for cutting die, is not suitable for single piece and small batch and master pieces cutting. Although other type semi-automatic cutting machine reduces the worker labor intensity, but its function is simple, is only suitable for some rules in the shape of cutting parts. CNC cutting relative to manual and semi-automatic cutting way, sheet can effectively improve the cutting efficiency and cutting quality, reduce the operator labor intensity. At present, some small and medium-sized enterprises in our country and even in some panies using manual cutting and semi-automatic cutting way is also mon. At present, China's machinery industry steel usage has reached more than 300 million tons, is a large amount of steel cutting; With the development of modern mechanical industry, the plate cutting processing efficiency and product quality requirements also increased at the same time. Therefore nc cutter market potential is very b