钢筋自动下料机设计【含CAD图纸、说明书】
本科毕业设计(论文)中期检查报告题目: 钢筋自动下料机设计 学 院: 专 业: 机械制造及其自动化 班 级:姓 名:学 号:指导教师一、工作任务的进展情况设计初期查阅了大量的资料,分析比较各种可行的方案。 通过老师的指导,确定方案之后直到现在正在进行具体的结构设计工作,计算切断所需切削力,选取电动机,计算设计传动装置等,同时已经完成了实习报告和英文文献的翻译工作。我根据自己的设计以及查阅到的资料文献确定了自动下料机具体的结构,现在已经进入了画图的阶段。二、未按计划完成工作任务的原因细节问题处理不到位,有好多细节问题不是太清楚,需要继续查阅资料并解决三、工作中遇到的问题及改进措施1. 主要的难题就在于如何使 6 跟钢丝同时进行切削同时保证每次切削下来的工件长度一致,大小相等。因此考虑了使用液压装置来进行送料进给;同时也考虑利用两个滚轮相切与钢丝之间产生的摩擦力进行进给,分析比较利弊之后,选择后者比较方便而且经济。再者就是刀具的问题,可以有多种方式实现切断作业,可以锯断,可以车断也可以像锻造一样压断,最终比较利弊之后选择下面装固定刀把,在钢丝上端装移动刀把,两刀共同作用一起切断钢丝的办法。2. 在销轴和轴套类零件的加工生产工艺和流程方面实际的工作经验较少。3.对 CAD 画图软件的各种功能的应用还不太熟练。在以后的设计中加强学习。四、下一步工作计划把设计过程中遇到的细节问题通过查阅资料或问老师进行彻底解决。完成自动下料机二维图的绘制,进而完成自动下料机的设计,然后编写设计说明书。学生签字: 年 11 月 20 日 本科生毕业设计(论文)任务书(由指导教师填写)学院 学生姓名 专业班级设计(论文)题目 钢筋自动下料机设计主要研究目标根据多股钢筋自动下料及控制要求,设计钢筋自动下料机。实现多股钢筋同时自动切断下料,保证每股钢筋下料的长度一致。主要研究内容1. 下料机的结构设计,绘制总装图、部件图、以及部分零件图2. 电气控制系统设计3. 撰写设计说明书4. 翻译外文资料研究方法 查阅相关资料设计合理的零件结构并用 AutoCAD 将钢筋自动下料机装配体画出。说明书(论文)的要求毕业论文约 2 万字,英文翻译 3000 单词左右。图纸的要求设计原理正确,运用相关标准、查阅相关手册正确处理好图、数字、符号、标准等的关系,图样完整准确主要参考文献1 邱宣怀、郭可谦机械设计高等教育出版社 19972 郑文纬、吴克坚主编机械原理高等教育出版社 19963 廖希亮主编机械制图山东科学技术出版社 20024 李凯玲主编机械制造技术基础清华大学出版社 2010.4起止时间 指导教师签字: 系主任意见签字: 年 月 日院长意见签字: 年 月 日图纸目录1自动下料机总装备图 1 份2电气示意图 1 份3辊轮设计图 1 份4支架设计图 1 份5液压缸设计 1 份61双级圆柱齿轮减速器图 1 份7移动滑轨设计图 1 份8减速箱主轴设计图 1 份9行成开关示意图 1 份111 学 号:HEBEI UNITED UNIVERSITY毕 业 设 计 说 明 书GRADUATE DESIGN设计题目:钢筋自动下料机设计学生姓名:专业班级:学 院:指导教师: 本科毕业论文开题报告题目: 钢筋自动下料机设计学 部: 机械工程学院 专 业: 机械工程及其自动化 班 级: 姓 名: 学 号: 指导教师: 年 10 月 18 日开 题 报 告一、 题目来源背景自动下料机是钢筋加工必不可少的设备之一,它主要用于房屋建筑、桥梁、隧道、电站、大型水利等工程中对钢筋的定长切断。自动下料机与其他切断设备相比,具有质量轻、耗能少、工作可靠、效率高等特点,因此,近年来逐步被机械加工和小型轧钢厂等广泛采用,在国民经济建设的各个领域发挥了重要的作用。二、主要研究内容、应用价值、改进及创新本课题的目的是为了设计出一个用于钢筋自动切断下料的专用机床,机床大致由两部分组成:自动下料机床主机系统和控制系统。主机系统(包括主轴箱、移动夹具、滑动平台、施力油箱、床身等等结构)是自动下料机的主体构成部分,其作用是通过滑动夹具的运动,保证钢筋断料的尺寸精度,实现滑台快进、快退、工进等辅助运动,是自动下料机的执行机构。控制系统根据其控制对象可分为强电控制系统和弱电控制系统。强电控制系统主要是通过空气开关、离合器等主轴驱动电机等强电部分进行控制。弱电控制系统则是根据设定的切断程序和切断过程中的触发信号,通过控制液压系统的电磁阀与强电系统的离合器,实现下料过程的自动化控制,多使用电器可编程控制系统(PLC) 。本设计的主要特点是可实现多股钢筋一起下料加工,利用特制的移动夹具,可同时装夹多跟钢筋材料;再通过滑动平台的控制,实现多股钢丝的同时进给。同时本设计还可实现下料后的多段物料长度均匀一致,在进给方向上,安装特制的挡块,使钢筋在进给过程中每股进给量都相同,再利用大型刀具同时切断,保证了下料的物料长度相同,大小一致。国内外下料机的对比:由于自动下料机的技术含量低、易仿造、利润不高等原因,所以厂家近十年来基本维持现状,发展不快,与国外同行相比具体有以下几方面差距:1.国外下料机偏心轴的偏心距较大,如日本立式下料机偏心距 24mm,而国内一般为 17mm。看似省料、齿轮结构偏小些,但给用户带来麻烦,不易管理。因为在由切大料到切小料时,不是换刀垫就是换刀片,有时还需要转换角度。2.国外下料机的机架都是钢板焊接结构,零部件加工精、粗糙度尤其热处理工艺过硬,使下料机在承受过载荷、疲劳失效、磨损等方面都超过国产机器。3.国内下料机刀片设计不合理,单螺栓固定,刀片厚度够薄,40 型和 50 型刀片厚度均为 17mm;而国外都是双螺栓固定,2527mm 厚,因此国外刀片在受力及寿命等综合性能方面都较国内优良。4.国内下料机每分钟切断次数少。国内一般为 2831 次,国外要高出 1520 次,最高高出 30 次,工作效率高。三、拟采用的研究方法、手段及实验准备情况1.设计钢筋自动下料机床,能实现钢筋的自动切割下料,从而实现连续自动切割,达到高效加工目的。2.完成自动下料机床的总体方案设计、部件设计、零件设计、夹具设计。3.要求结构紧凑,安全可靠,力求价廉物美。4.要求阅读机械设计手册,机械设计基础,机械制图,ProE 三维技术,AutoCAD,互换性与测量技术,工程材料,可编程序控制器等参考资料及书籍。参考文献1 邱宣怀、郭可谦机械设计高等教育出版社 19972 郑文纬、吴克坚主编机械原理高等教育出版社 19963 廖希亮主编机械制图山东科学技术出版社 20024 李凯玲主编机械制造技术基础清华大学出版社 2010.45 杨立军主编材料连接设备及工艺机械工业出版社 2008.106 孟进礼 对钢筋下料机发展的几点看法 建筑机械化20007 王平、张强 钢筋调直切断机的顶刀与连切 建筑机械1997 8 宜亚丽 钢筋矫直切断机剪切机机构研究分析 机械2004 9 高蕊 钢筋切断机切段过程分析及最大冲切力的计算 建筑机械化199510 Jcsko J T. Optimizing performance of bar mill shear knives. Assoc Iron Steel Eng, Pittsburgh, PA,USA, 1997,(9):41-4611 Mundanjohl Theo, Modemization of a merchant bar mill. MPT Metallurgical Plant and Technology, 1987,(4):14,16指导教师意见:指导教师签字:2013 年 10 月 18 日院毕业设计(论文)领导小组意见:负责人签章: 年 月 日摘 要-I-摘 要钢筋自动下料机,是一种能够将钢筋拉直,并将钢筋切成一定长度的工程机械。机械结构分钢筋调直和钢筋切断两部分;工作时钢筋自动下料机的进给机构可以自动送入钢筋,并将钢筋拉直;当输出的钢筋达到一定长度时再由液压控制的钢筋切断机构将钢筋切断。一、校直系统的设计。通过施加高频率的周期性交变应力,使材料产生超过其弹性限度的变形,原弯曲被抵消,达到校直目的。二、切断机构的设计。当钢筋达到所需长度时,切断机构自动进行切断,切断后活动切刀回到原始位置。三、传动系统的设计。电机通过一组的 V 带、减速器、齿轮、主动辊轮和从动辊轮,达到校直钢筋的目的。四、辅助装置的设计。主要是起到辅助作用的支架和主体钢架。五、电气控制系统的设计。选用 AT89C51 型单片机控制钢筋自动下料机的自动化动作。关键词 钢筋自动下料机,辊轮调直,电气控制,液压剪切装置。Abstract-II-AbstractThe steel automatic cutting machine can straighten steel, and cut it in a certain length. Mechanical structural include steel straightening and steel cutting. The feed mechanism of the Automatic steel cutting machine can transport the steel automatically at work, and straightened the steel. When the output of steel reaches a certain length and then cut off by the reinforcement agencies controlled by the hydraulic.The first. The design of the alignment system. Through periodic alternating stress applied high frequency, produce deformation more than its elastic limit. The alternately deformation reaches a certain level, The original bending is offset, To achieve the purpose of straightening.The second. The design of the cutting off institutions. When the steel to reach the required length, cutting mechanism of automatic cut, cut back to the original position after the cutting knife.The third. The design of the transmission system. A group of V with motor, reducer, gear, driving roller and the driven roller straightening reinforced to achieve through.The fourth. The design of the assistive devices. The assistive devices include stent and the main steel frame. The fifth. The design of the electrical control system. The AT89C51 type SCM is selection to control the automatic work of the steel automatic cutting machine.keywords Steel automatic cutting machine, Roller straightening, Electrical control, Hydraulic cutting device附录-3-目 录摘 要 .IABSTRACT.II第 1 章 绪论 11.1 钢筋自动下料机的应用、现状及其前景 21.2 自动下料机的分类及特点 41.3 钢筋自动下料机的基本结构及工作原理 8第 2 章 钢筋自动下料机设计方案 122.1 传动方案比较 .122.2 设计方案确定 .122.3 总体结构示意图 .132.4 本章小结 14第 3 章 自动下料机的机构设计 153.1 传动机构的设计 153.1.1 电机的选择 .153.1.2 带传动设计 .173.1.3 双级减速器设计计算 203.1.4 齿轮传动部分的设计 483.1.5 传输轴的校核 553.1.6 传输用轴承的选用与校核 603.1.7 键的选取与校核 603.2 进给辊轮的结构设计 613.3 控制长度用直线导轨的选择及计算 623.4 切削用液压缸的选择 633.5 本章小结 68第 4 章 自动下料机辅助装置设计 694.1 用于防止进给时钢筋下落用支架设计 694.2 自动下料机整体机架的结构设计 704.3 本章小结 70第 5 章 电气控制部分设计 715.1 单片机控制示意图设计 715.2 单片机控制程序设计 715.3 控制部分原理及电气元件安装位置 735.4 本章小结 73结 论 74Abstract-4-本课题研究的内容总结 74参考文献 75谢 辞 77附 录 78111 学 号: HEBEI UNITED UNIVERSITY毕 业 设 计 说 明 书GRADUATE DESIGN设计题目:钢筋自动下料机设计英文翻译学生姓名:专业班级:学 院:指导教师:Chapter 1Introduction1Chapter 1 IntroductionWith the rapid development of Chinas economic construction, construction also has been rapid development. The reinforcement material as an important construction projects, the demand is growing dramatically, which effectively pulling the market demand for steel automatic cutting machines. And in recent years, high strength, good ductility and excellent performance, quick been widely used in the national construction of its new steel grade III. It also put forward higher requirements for buildings with steel automatic cutting machine 1. For this reason, many companies have invested a lot of money, competing development, development for high-speed, large-diameter steel reinforcement required by the new class III under the automatic feeder.Chinas introduction in 1958, the Soviet Unions bedroom steel automatic cutting machine drawing, began to produce the countrys first steel automatic cutting machine, the production of GQ40A type steel automatic cutting machine is its improved. 40A cutting machine is fully open architecture, all of the transmission gear all exposed. Thus, the dust-poor performance, easy to wear, cutting the number of 28 beats / min, and no clutch control, safe operation, quality, volumes are larger. More than 20 cutting machine manufacturer, from 1966 to 1985 has been the model for leading products. 1982 Taiyuan Heavy Machinery Institute machinery plant design GQ40BII type steel automatic cutting machine at the crankshaft gear mounted on a rigid turn key clutch pedal steering mechanism controlled by cutting, while retaining material and fitted with feeding device. The models for safe operation, accurate cutting length, reduce labor intensity. Currently under GB50B series steel feeder on the market with a fully enclosed, lubrication systems, Flying Wheels, Huff cabinet structure, and therefore, easy maintenance, safety and reliability, high efficiency, light weight, energy section. Other types of steel automatic cutting machine, such as the GT series automatic steel cutting machine is mainly used for straightening, cutting length of cold-rolled ribbed steel, hot-rolled and cold-rolled steel grade III round bars. This series of high degree of automation, equipment failure rate for continuous duty mode. Low energy consumption, without prejudice to the ribs, without even cutting, low noise, vibration light and equipped with safety devices, automatic stopping device count, there are efficient and reliable operation of the trial 2. In addition, there are many on the market reinforced hydraulic automatic cutting machine, such as DYJ-32-Hebei United University School of Continuing Educationand YQJ-32 type automatic hydraulic steel cutting machines, cutting machines both have adopted a piston pump driven by the main cut to the structure, convenient operation, but processing difficulties, difficult to ensure accuracy, can not achieve rapid return, low efficiency. Compared with the international advanced products, the overall level of Chinas steel automatic cutting machine is still relatively backward. Main features: small-scale enterprises, low-tech products, low productivity, high level of automation level is not rough appearance quality 2. Most of the products and the modulation speed is low, not high straightness reinforced, scratch the surface of the heavierThe face of an increasingly competitive Chinese construction machinery market, investments in technology, emphasis on new technology, new product research and development, improve product quality, so that the companys products continue to meet the needs of customers, to shorten the gap with foreign companies forward as soon as possible 1, is Chinas steel automatic cutting machine reached the international advanced level, is undoubtedly Chinas vast steel automatic cutting machine manufacturer only way to survival and development1.1 steel automatic cutting machine applications, status and prospectsApplication of (1) in the next feederSteel automatic cutting machine is a tool used by the shear reinforcement. Generally have automatic and semi-automatic steel cutting machine steel cutting machine of the points. It is one of the essential steel processing equipment, it is mainly used for building construction, bridges, tunnels, power plants, large-scale water conservancy projects for steel and Cutting. Compared with other steel cutting machine cutting equipment, light weight, low energy consumption, reliable operation, high efficiency, and therefore is widely used in recent years gradually machining and small rolling mills, etc., in all areas of the national economy played an important effect. Steel automatic cutting machine, there are two types of automatic cutting machine called the electric off, the motor is converted into kinetic energy by controlling the cutter cuts to achieve the effect of shear reinforcement. The semi-automatic is manual control incision, thereby shear reinforcement operation. At present, more is should belong hydraulic steel cutter cutting machine, hydraulic steel cutting machine and portable rechargeable divided into two categories.Chapter 1Introduction3Due to cost and efficiency factors, more small businesses to choose a manual hydraulic cutting machine cutting, length and efficiency to control by the workers, the efficiency is not high accuracy, and are often not able to meet production needs, so the design is automatically cutting machine, pressing rollers carried by the feed, and two pairs of rollers for straightening, when it reaches a predetermined length, by electrically controlling the hydraulic cylinders push the knife for cutting, and is to ensure that each simultaneously cutting a plurality of when the length of the same size, at the same time, but also to ensure high efficiency in medium and large enterprises has been widely used, which greatly improves the efficiency of cutting steel.Development Status (2) cutting machinesForeign cutter eccentric shaft eccentric distance is large, such as Japan, vertical cutting machine eccentricity 24mm, while the domestic is usually 17mm. Seemingly and material, some small gear structure, but give users the trouble, is not easy to manage. Because when you expect from the big cut cut small material, not the tool change is to change the blade pad, and sometimes need to convert angles.Rack cutter are foreign steel plate welded structure, parts machining accuracy, especially in the heat treatment process roughness excellent, the cutting machine to put too load, fatigue failure, worn over other aspects of domestic machines.Domestic cutter blade design is unreasonable, single bolt, blade thickness thin enough, 40-and 50-type blade thickness are 17mm; while abroad are double-bolted, 25 27mm thick, so the foreign forces and blade life, etc. comprehensive performance are excellent over the country.Domestic cutter cut fewer times per minute. China is generally 28 to 31 times higher abroad 15 to 20 times, 30 times higher than the highest high efficiency.Foreign models generally use a semi-open structure, gears, bearings with grease lubrication, crank shaft, connecting rod bearing, red knife, twist added by hand at oil lubrication. Domestic model structure fully open, fully closed, half open, half closed three kinds, have centralized lubrication oil lubrication and splash lubrication of two kinds.Domestic cutter appearance quality, overall performance unsatisfactory; shown in Figure 1-1; foreign manufacturers are generally scale production, willing to invest in technology and equipment, high level of automation, the formation of a comprehensive quality assurance process systems. In particular, the appearance Hebei United University School of Continuing Educationquality is better, cover one-time stamping, paint by spraying paint color with scientific and reasonable, there is not much the outside welds, burrs, sharp corners, the overall smooth appearance. Some domestic manufacturers although Figure 1-1 domestic rebar cutter cutting machine commonly used in the overall figureProduction history is long, but no one scale, coupled with aging equipment, processing physical fight, experience, production processes consistent system for decades, so the rough appearance of quality, perception is poor.(3) under development prospects steel automatic feederDomestic use from the current situation, hammer, reinforced mechanical structure of the automatic length cutting machine dominates. This is mainly because of high precision mechanical length of the length, suitable for the production of prestressed reinforced concrete, reinforced this structure under the automatic feeder reinforced its forward speed is generally 0.5 0.8m / s . The length of reinforced user less precision, reliability is a major requirement, the failure rate should be as low as possible, the output should be as high as possible 8. For this reason, the use of hydraulic cutting machine mechanism is simple, reliable performance and shorten its cut time and improve productivity in the future development direction of steel straightening and cutting machines.But the automatic hydraulic cutting machine steel shear rate than slower. If hydraulic cutting machine 0.5S need to complete a cut, while the forward speed steel is 0.5m / s, the shearing process requires hydraulic shear reinforcement ahead with 0.25m, so you need to slide under the hydraulic steel feeder long as the forward speed is greater than the steel 0.5m / s, the guide rails and the forward speed increases with longer 9. This shows that a key factor in the lower steel automatic cutting machine Chapter 1Introduction5Straightening speed lies in the cutting cycle is too long, which greatly limits the cutting machine efficiency.Domestic auto cutting machine shearing time generally in 80 120ms, which can only lead to straighten speed hovered between 50 70m/min. The rate of foreign Straightening Straightening Machine reason are generally able to reach 120m/min, the main reason is to be able to cut the time down to less than 20ms. So, when asked how to shorten the automatic feeder shear is an important task to improve steel automatic cutting machines. Steel automatic cutting machine cut to length required to achieve not only high-precision control, while required to have a relatively high production efficiency. So, how to use the following features of hydraulic steel automatic feeder, make steel electro-hydraulic automatic cutting machine to achieve a high degree of integration, give full play to their respective advantages, will be the main direction of future research.1.2 Classification and Features automatic cutting machineCurrently, the production and sale of steel on the market many types of automatic cutting machine, according to the characteristics of facilities and working bodies, can be classified according to the following six ways: by length mode, press blanking mode, press control, press a material way, by the way, and by cutting off straightening way. Here are several ways on this introduction Mechanical and electromechanical: length mode (1) Length way steel cutting machine generally exists in two ways.Mechanical length error is small, easy to control, but noisy, short life. Length of error requirement applies to the higher speed is not critical.Electromechanical length error is slightly larger, less noise, and long life. For the lower tolerance requirements for length, straightening speed requirements of the occasion.Cut to length signals emitted roughly three forms: Telecommunications No. mechanical signals, electrical limit switch (contact or contactless) issued photoelectric encoder issued.Generally, the accuracy depends on the length of time the signal issued from the error response to the cutter. High precision mechanical signals, the error in plus or minus 1mm, because it is directly associated with the cutter, short response time, the time error is small. Other forms of length error of plus or minus 5 30mm.Hebei United University School of Continuing Education(2) the way blanking blanking main methods of supporting pillar, turn plate, withdrawal plate and open type four.support pillar structure is simple, small job noise. Suitable for small diameter round bar and rebar straightening high degree occasions.turn plate structure is more complex, larger work noise. For large, medium diameter steel.withdrawal plate structure is more complex, larger work noise. For large, medium diameter steel.Simple open structure, a smaller working noise. For large, medium diameter steel bars, and high bar straightening of the occasion.(3) Control Control of ordinary electrical control and PLC control.Normal electrical control circuit complexity, higher requirements for maintenance personnel. Low control accuracy, ease of failure, the initial commissioning of trouble.PLC control circuit is simple, do not ask for maintenance personnel. High control precision, stable operation, the initial commissioning simple.(4) In a material way the way to separate the material and non-unwinding roll style.complex unwinding devices, actinomycetes speed steel twist is not particularly suitable for high speed operation.non-open-book-style single device, suitable for straightening speed is not too high in the workplace. When actinomycetes reinforced natural twist.(5) Straightening way reinforced mode automatically straighten the main feeder straightening mode, curve roll on and roll-to-roll straightening mode plus compound.Mode Bar Straightening Straightening effect, relatively easy to control. But straightening speed is low, the surface to be machined steel scratches, large work noise. This mode is suitable for a variety of plain bars.curve roller straightening faster, better steel straightening effect, and easy Chapter 1Introduction7to control. But scratch the surface to be machined steel heavy work noise as well. For a variety of light round steel and reinforced surface scratches less demanding situations.on roll straightening speed steel surface to be machined with a slight scratches, small working noise. Steel straightening effect in general, higher control requirements. For a variety of steel, especially for cold-rolled ribbed steel bars.straighten mode plus composite roller straightening effect is better, easier to control. Straightening roll faster than the curve below on roll. Processed steel surface scratches, working noise is relatively small. For a variety of reinforcement.(6)Different ways of cutting off the way, largely affects the performance of cutting machine, the following will cut a variety of ways described in detail, to analyze its working principle and characteristics. By cutting moves the cutter can be divided into: Rotary Cut, cut and down up and down the mobile shearing three 5, it works shown in Figure 1-2.Hebei United University School of Continuing EducationFigure 1-2 off three kinds of waysWhen working around the rotating frame of steel in the continuous rotation of the traction wheel and frame straightening roller straightening the joint action, from the knife through the middle, into the Order of the rack. After adjusting reinforced when the tip touches the straight length device signal generator, a signal generator, actuator cutting tool to cut off the steel tool returns to the starting position next time.Rotary cutting system consists Cheng rack, fixed-length switches, solenoids, jaw, active gear, cut gears, brakes and other components. When reinforced through two slits cut into the Order of the intermediate gear rack and fixed-length touch switch, driven by an electromagnet so fly jaw clutch shaft and drive gear shaft, pinion gear rotation drive gear rotates third week off while cutting steel. On three pairs of uniform cut gear teeth and take turns working to extend tool life.Cut down mobile rack system consists Cheng, fixed-length switches, solenoids, turn key clutch, crank and connecting rod, pan-style units under the knife, swinging the cutting blades, brakes and other components. When reinforced by entering the Order of the rack and pan-style touches length under the knife switch, turn key clutch solenoid drive shaft and the crank shaft so fly connection, connecting rod crank role in promoting pan-type knife table in the next four-bar linkage under forward. Cut one end of the swing blade fixed to the frame, the other end of the blade close to the edge of the pan-style units under the knife, when the pan cutter station along the arc trajectory, the relative movement of the two blade edge, cut steel, knife sets reset crank so wait for the next cut.Form down shearing systems are more driven by the form of the tool can be divided into: swing, hammer, hydraulic.Swing off mode: This device is similar institutions a guillotine shear, when reinforced by fixed fixed knife into the Order of the holes on the rack and rack touches length switch, clutch friction plate with cam shaft rotation, so that the cam swing arm with the cutter, a cutting operation to complete. Currently imported automatic cutting machine shearing mechanism mostly adopt this approach.Hammer off by: Most domestic ribbed steel plants and precast plant to use automatic cutting machines are used in such institutions. The device is driven by the motor rotates a crankshaft, a high-speed hammer kept moving up and down under the action of the crankshaft, the position of the hammer on the back of a sliding knife sets, knife cut off the platform with a steel cutter. When reinforced advance to a Chapter 1Introduction9predetermined length, length steel plate and slide the knife touched the tip attached units, cut to length plate knife sets driven forward. When the station moved the knife up and down movement of the high-speed hammer, the hammer blow of the knife blade platform, the cutter on the steel cutting knife, cut rebar falls within the Order of the rack, and slide the compression spring knife sets quickly pushed back to the original location, to avoid being the second hammer blow. Hammer cutting mechanism, has long been in existence even cut problem called chronic problem industries. With the development and application of “zero even cutting device stamping and cutting equipment hammer“ patent technology, not only solve the problem even cut off body hammer and straighten good, the length of error is small. Hydraulic cutting method: by cutting into the steel edge Cheng rack touches length signal, which can control the operation of the hydraulic cylinder, the hydraulic cylinder piston rod end is provided with a cutter to cut steel rod downward. This way depending on the cut, length accuracy length bodies are different.Despite hydraulic steel cutting machine cutting machine is later than mechanical , but it has unparalleled technical superiority and high economic efficiency. Its technical superiority roughly in the following areas :( 1 ) has a higher performance because the higher hydraulic pressure can be used , and thus automatic cutting function reinforced high impact force to cut .( 2 ) has a lower operating noise out of the gears and other mechanical drive , straight drive directly implemented by the cylinder, thus a simple structure , low noise .( 3 ) has a better ability to adapt the work can be achieved in a 6mm diameter steel processing between 16mm of . At the same time , but also a multi-purpose machine , using different working head can be a variety of work , such as bending , perforation.( 4 ) having a higher reliability for all the clutch means is omitted , since the clutch device does not produce reliable and even cut , easy to automate production . Meanwhile, the control system is introduced , cut to length can be achieved , and to ensure the cut surface quality steel .( 5 ) easy to carry when the output power or output torque is the same, the weight of the hydraulic working head is much smaller than electric or pneumatic tools. In
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