设计简介
1.5兆牛摆动剪切机构设计
摘要
1.5兆牛摆动剪切机是安装在500型钢热连机前，用于切头切尾和卡钢事故的处理剪。随着国民经济的发展，对型钢产品数量的要求更高。本设计为型钢设计切头的摆动剪，设计中对摆动剪的局部做了改进。
首先，本文讨论了型钢轧机在国民经济中的地位，并对300/500机组平面布置示意图的概况进行了整体的介绍。并介绍了摆动剪的结构特点和研究的内容与方法。根据现有设备状况，对设备生产中存在的问题进行分析，对主要部件结构做了合理的选用。然后，根据机组原始参数初选主电机容量，对其进行发热校核和过载校核，对主要零件进行强度校核。对齿轮做了强度计算，对曲轴计算了弯曲应力，弯扭合成应力；校核了危险断面；以及滑块损坏的改进设计及润滑方法，简单计算摆动剪的可靠性和经济评价。
通过以上工作，1.5兆牛摆动剪切机在使用寿命、产品质量理论上应该有一定的提高。设计内容有实际价值。该剪作为加热炉前方坯切头飞剪。
关键词：剪切机，摆动，主传动
A Design of 1.5
Swing Scissors
1.5
swing scissors is installed before the 500 sharp steel of hot continuous rolling mills, which is used to cut the head and end of the steel and deal with the jamming of the steels.With the development of the national economy, the request of the sharp steels’s quality is higher than before. In the thesis, the cutting of the head of the 1.5
swing scissors is researched, and makes some improvments of partial strcture.
First, the thesis has discussed the position of the rolling mill of sharp steel in the national economy, and makes the general instruction for 300/500 unit plane arrangement. Next, introducing the structural characteristic of the swing cutting and the method and content of the research .According to exising equipment condition, analysing the exist problem in equipment production, the strcture of the major parts are reasonable to choosed. Then,according to the primitive parameter of the unit, I primarily choose the capacity of the main motor, and make the heat examination and overload examination, choose if satisfying the requirement, otherwise choose again until the examination is satisfyed. I make the strength examination for major element. As to gears, I make the strength calulation; as to crank, I caculated the curving stress and the crooked synthesis stress, examinationing the dangerous cross section, as well as the improment of the damages of the slide and the method of lubrication. Finally I caculated the economy appraisal and the reliablity of swing scissors.
Through the work of this thesis, 1.5
swing scissors should certain raise in service life and product quality theoretically, but need the unceasing improvement in practice.
Key-word: scissors, swing, main drive
目 录
1绪论……………………………………………………………………………1
1.1课题的选择的背景和目的……………………………………………...1
1.2热轧型钢的国内外的发展趋势………………………………………...2
1.2.1轧机布置向半连续化或全连续化发展………………….....…..2
1.2.2轧制工艺改革出现了切分轧制、热轧冷拔…………………...2
1.2.3轧机结构改造 提高轧制速度………………………………. ...2
1.2.4加热炉控制……………………………………………………...2
1.2.5冷却工艺改造……………………………………………….......2
1.3剪切机的种类和用途…..…..…..…....…....…..…..…..…..…..…....…...2
1.3.1摆动式剪切机……………………………………………….......3
1.3.2滚动式飞剪……………………………………………………...3
1.3.3曲柄偏心式飞剪……………………………………...…………3
1.4摆动剪研究的内容和方法………………………………………….…..3
1.4.1摆动剪在型钢连续机组布置和作用………………...…………3
1.4.2型钢热连轧机的生产工艺……………………………………...3
1.4.3摆动剪的结构特点和研究的内容与方法……………………...4
2摆动剪设计方案的选择和评述………………………………………………4
2.1摆动式飞剪机设计方案的选择………………………………………...4
2.1.1摆动式飞剪传动简图…………………………………………...4
2.1.2摆动剪的剪切过程……………………………………………...5
2.2摆动剪方案评述………………………………………….……………..5
2.2.1减小摆角………………………………………………………...6
2.2.2增加许用摆角…………………………………………………...6
3剪切力的计算………………………………………………………..……….7
3.1剪切速度和剪切力……………………………………………..……….7
3.1.1摆动剪设计参数…………………………………………….…..7
3.1.2剪切机构主要参数的确定……………………………...…...….7
3.1.3剪切速度的确定……………………………………………..….8
3.2剪切力矩的计算……..………………………………………………....11
4电机型号及容量的选择……………………………………….……….…....13
5主要零件的强度计算……………………………………………………….14
5.1齿轮的强度计算……………………………………………………….14
5.1.1按齿面接触强度设计………………………………………….14
5.1.2计算……………………………….…………………...……….14
5.1.3按齿根弯曲强度设计………………………………………….15
5.1..4几何尺寸计算…………………………………………………17
5.2曲轴的强度计算……………………………………………………….17
5.2.1曲轴的尺寸和材料性能……………………………………….17
5.2.2曲轴的强度校核……………………………………………….17
5.3切向键的计算………………………………………………………….20
5.4滑块损坏的改进设计…………………………………………...…….21
6润滑方法的选择……………………………………………………………..22
6.1润滑和摩擦的概念……………………………………………...……..22
6.2剪切机设备润滑方法………………………………………………....23
7试车方法和对控制系统的要求……………………………………………..24
7.1试车要求………………………………………………….……………24
7.2维护规程……………………………………………………….………24
8设备的可靠性及经济分析……………………………………………..……25
结论………………………………………………………………….…………26
致谢……………………………………………………………………….……27
参考文献…………………………………………………………………….…28
摘要
1.5兆牛摆动剪切机是安装在500型钢热连机前，用于切头切尾和卡钢事故的处理剪。随着国民经济的发展，对型钢产品数量的要求更高。本设计为型钢设计切头的摆动剪，设计中对摆动剪的局部做了改进。
首先，本文讨论了型钢轧机在国民经济中的地位，并对300/500机组平面布置示意图的概况进行了整体的介绍。并介绍了摆动剪的结构特点和研究的内容与方法。根据现有设备状况，对设备生产中存在的问题进行分析，对主要部件结构做了合理的选用。然后，根据机组原始参数初选主电机容量，对其进行发热校核和过载校核，对主要零件进行强度校核。对齿轮做了强度计算，对曲轴计算了弯曲应力，弯扭合成应力；校核了危险断面；以及滑块损坏的改进设计及润滑方法，简单计算摆动剪的可靠性和经济评价。
通过以上工作，1.5兆牛摆动剪切机在使用寿命、产品质量理论上应该有一定的提高。设计内容有实际价值。该剪作为加热炉前方坯切头飞剪。
关键词：剪切机，摆动，主传动
A Design of 1.5
Swing Scissors1.5
swing scissors is installed before the 500 sharp steel of hot continuous rolling mills, which is used to cut the head and end of the steel and deal with the jamming of the steels.With the development of the national economy, the request of the sharp steels’s quality is higher than before. In the thesis, the cutting of the head of the 1.5 swing scissors is researched, and makes some improvments of partial strcture.First, the thesis has discussed the position of the rolling mill of sharp steel in the national economy, and makes the general instruction for 300/500 unit plane arrangement. Next, introducing the structural characteristic of the swing cutting and the method and content of the research .According to exising equipment condition, analysing the exist problem in equipment production, the strcture of the major parts are reasonable to choosed. Then,according to the primitive parameter of the unit, I primarily choose the capacity of the main motor, and make the heat examination and overload examination, choose if satisfying the requirement, otherwise choose again until the examination is satisfyed. I make the strength examination for major element. As to gears, I make the strength calulation; as to crank, I caculated the curving stress and the crooked synthesis stress, examinationing the dangerous cross section, as well as the improment of the damages of the slide and the method of lubrication. Finally I caculated the economy appraisal and the reliablity of swing scissors.
Through the work of this thesis, 1.5
swing scissors should certain raise in service life and product quality theoretically, but need the unceasing improvement in practice.Key-word: scissors, swing, main drive
目 录
1绪论……………………………………………………………………………1
1.1课题的选择的背景和目的……………………………………………...1
1.2热轧型钢的国内外的发展趋势………………………………………...2
1.2.1轧机布置向半连续化或全连续化发展………………….....…..2
1.2.2轧制工艺改革出现了切分轧制、热轧冷拔…………………...2
1.2.3轧机结构改造 提高轧制速度………………………………. ...2
1.2.4加热炉控制……………………………………………………...2
1.2.5冷却工艺改造……………………………………………….......2
1.3剪切机的种类和用途…..…..…..…....…....…..…..…..…..…..…....…...2
1.3.1摆动式剪切机……………………………………………….......3
1.3.2滚动式飞剪……………………………………………………...3
1.3.3曲柄偏心式飞剪……………………………………...…………3
1.4摆动剪研究的内容和方法………………………………………….…..3
1.4.1摆动剪在型钢连续机组布置和作用………………...…………3
1.4.2型钢热连轧机的生产工艺……………………………………...3
1.4.3摆动剪的结构特点和研究的内容与方法……………………...4
2摆动剪设计方案的选择和评述………………………………………………4
2.1摆动式飞剪机设计方案的选择………………………………………...4
2.1.1摆动式飞剪传动简图…………………………………………...4
2.1.2摆动剪的剪切过程……………………………………………...5
2.2摆动剪方案评述………………………………………….……………..5
2.2.1减小摆角………………………………………………………...6
2.2.2增加许用摆角…………………………………………………...6
3剪切力的计算………………………………………………………..……….7
3.1剪切速度和剪切力……………………………………………..……….7
3.1.1摆动剪设计参数…………………………………………….…..7
3.1.2剪切机构主要参数的确定……………………………...…...….7
3.1.3剪切速度的确定……………………………………………..….8
3.2剪切力矩的计算……..………………………………………………....11
4电机型号及容量的选择……………………………………….……….…....13
5主要零件的强度计算……………………………………………………….14
5.1齿轮的强度计算……………………………………………………….14
5.1.1按齿面接触强度设计………………………………………….14
5.1.2计算……………………………….…………………...……….14
5.1.3按齿根弯曲强度设计………………………………………….15
5.1..4几何尺寸计算…………………………………………………17
5.2曲轴的强度计算……………………………………………………….17
5.2.1曲轴的尺寸和材料性能……………………………………….17
5.2.2曲轴的强度校核……………………………………………….17
5.3切向键的计算………………………………………………………….20
5.4滑块损坏的改进设计…………………………………………...…….21
6润滑方法的选择……………………………………………………………..22
6.1润滑和摩擦的概念……………………………………………...……..22
6.2剪切机设备润滑方法………………………………………………....23
7试车方法和对控制系统的要求……………………………………………..24
7.1试车要求………………………………………………….……………24
7.2维护规程……………………………………………………….………24
8设备的可靠性及经济分析……………………………………………..……25
结论………………………………………………………………….…………26
致谢……………………………………………………………………….……27
参考文献…………………………………………………………………….…28
