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飞剪机传动装置的设计【8张CAD图纸和说明书】

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总装配图 A004.dwg

装配图 A004.dwg

轴1 A204.dwg

轴2 A304.dwg

轴3 A304.dwg

齿轮1 A304.dwg

齿轮2 A204.dwg

齿轮3 A204.dwg

总装配图 A0.dwg

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轴1 A2.dwg

轴2 A3.dwg

轴3 A3.dwg

齿轮1 A3.dwg

齿轮2 A2.dwg

齿轮3 A2.dwg

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关键词：: 飞剪机传动装置设计 cad 图纸以及说明书仿单

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内容摘要 1

关键词 1

Abstract 1

Key words 1

1.绪论 2

1.1飞剪机的概述 2

1.2传动装置的概述 3

2.传动方案的确定 3

2.1电动机的选择 4

2.2传动方案的确定 5

2.3传动装置的运动和动力参数 6

3.主要零部件的设计计算与校核 7

3.1减速级齿轮的设计与校核 7

3.2传动级齿轮的计算与校核 12

3.3轴的设计与校核 13

3.4键的选择与校核 23

3.5轴承的选用与校核 24

4.零部件的选取及润滑 26

4.1对离合器性能的要求 26

4.2对制动器性能的要求 26

4.3飞剪机箱体结构 26

4.4飞剪机传动装置的润滑 27

结论 28

参考文献 30

致谢 31

飞剪机传动装置的设计

内容摘要：飞剪机是冶金工业的重要装备，它为冶金行业的发展注入了新的生机。随着现代化钢材生产的产量和品种的不断增加，要求轧钢生产向高速，连续化生产方式发展的今天，飞剪机的需求量不断增加。因此，作为其核心部位的传动装置，就显得尤为重要。传动装置是为机械提供动力的装置，它处于能量流系统的中间位置，主要用于将原动机的运动和动力传给执行机构。它具有基础性和独立性，其性能的优劣直接影响着飞剪机的性能。本文根据设计要求，通过对相关齿轮、轴以及相关传动部件的设计计算，完成了对传动装置的设计，使其符合设计要求，达到使用目的。

关键词：传动装置齿轮轴设计

Abstract：The shearing machine which has injected vigorous into the development of metallurgical industry is the major equipment of metallurgical industry. With the continuous increase of modernization steel production and varieties, and the developing requirement for high speed ,continuous means of rolling production process, the demand of shearing machine is constantly increasing. So, the transfer device which is regarded as the main parts of shearing equipment is particularly important. It takes the middle position in the flowing process of energy system, provides power for machine, and is always used for delivering the movement and motivation to the actuating mechanism. Considering its basic and independent characteristics, the quality of transfer device directly influences the function of shearing machine. According to the design requirements, this paper finished the design for transfer device through the careful design counting of the gears、axles and other relevant transfer devices and finally achieved the purposes of practice.

Key words：Transmission Gear Shaft Design

1.绪论

1.1飞剪机的概述

1.1.1飞剪机的认识及分类

飞剪机是在轧件运动中对轧件实施剪切工艺的一种设备，是连续式轧钢生产线上不可缺少的，非常关键的设备之一。特别是随着现代化钢材生产的产量和品种的不断增加，要求轧钢生产向高速，连续化生产方式发展的今天，飞剪机的需求量不断增加，自然而然的对飞剪机的设计和制造质量提出了更高的要求。由于是运动中对轧件实施剪切，因此，对飞剪的运动特性，反应灵敏性，以及工作稳定可靠等各方面都必须有很高的要求。

飞剪机的剪切工艺主要包括：对连轧生产线上的轧件实施切头、切尾，切定（倍）尺，以及事故处理和轧件的样品剪切等。

飞剪机的分类方法有很多种，主要有：按照轧制线上生产钢材的品种不同分为，钢坯飞剪机、板带飞剪机、型钢飞剪机和高速线材飞剪机等；按其机体结构和剪切形式不同分为，曲柄连杆式飞剪机、摆式飞剪机、滚筒式飞剪机、圆盘式飞剪机；按工作方式又可分为连续式飞剪机、起停式飞剪机和连续—起停复合式飞剪机。

1.1.2飞剪机的设计要求

(1)速度要求飞剪机的剪切速度应与轧件同步，最理想的状态是在剪切时，飞剪机的剪刃在轧件运动方向上的速度应等于或略大于轧件运动速度（俗称抛钢）。但此时必须要考虑飞剪机剪切时的动态速降。

(2)剪切质量要求为保证轧件剪切断面（平直）质量，要求飞剪机的一对剪切刀片在剪切过程中作平移（平行移动）运动，剪刃间的刀片侧隙应尽可能保持不变，同时，两刀片始终与轧制中心线相垂直。

(3)剪刃要求剪刃的运动轨迹应是一条封闭曲线，在剪切段应尽量平直，在剪切过程中要求剪切速度均匀，并且不能出现相碰卡死现象。剪切完后，剪刃仍恢复到固定的初始位置，不影响轧件自由通过。

(4)刃侧隙要求应能根据不同的轧件厚度，甚至轧件形状，合理方便地调整剪刃侧隙及重合量，以保证剪切工艺的正常实施。

(5)精度要求尽量减少参与剪切运动的机构零部件的数量和重量，以降低剪切机构运动的惯量值（即飞轮矩），减少速度变化量，提高飞剪机剪切机构的灵敏性稳定性和定位精度，从而提高飞剪机的剪切定尺精度。

(6)辅助设备要求合理配置适合于飞剪机的同步机构及前后设备，如夹送测速辊，或末架轧机，拨钢管（槽）等。此项因飞剪机结构选型及工作方式不同而不同，以保证飞剪机剪切速度与轧件速度始终保持线性系从而保证剪切定尺精度和剪切质量。

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内容简介：: 毕业论文（设计）任务书题目名称飞剪机传动装置的设计学生姓名所学专业机械设计制造及其自动化班级指导教师姓名所学专业职称完成期限一、论文（设计）主要内容及主要技术指标主要内容：飞剪机整体结构的认识；飞剪机传动装置的组成；飞剪机传动装置的布局；飞剪机传动装置的电动机选择；飞剪机传动装置齿轮和轴的设计；飞剪机传动装置设计部件的校核。设计思路：根据机器整体结构进行传动装置的布局；根据飞剪机输出与输入转速的不同确定总传动比；根据总传动比分配传动比；根据各级传动比设计合适的传动方案；根据方案逐级进行齿轮和轴的设计；根据使用环境对齿轮和轴进行验算校核；最后和飞剪机其他部分的设计进行整合验证。技术指标：电动机的功率；齿轮的强度和寿命；轴的强度和寿命二、毕业论文（设计）的基本要求1.格式必须正确2.字数足够3.内容充实4.设计思路清晰正确5.设计合理6 计算正确三、毕业论文（设计）进度安排12.3.2012.3.31 开题，开题报告.10 课题构思，查找资料12.4.1112.5.15 论文准备，修正12.5.1512.5.20 答辩准备及答辩Gear mechanismsGear mechanisms are used for transmitting motion and power from one shaft to another by means of the positive contact of successively engaging teeth. In about 2,600B.C., Chinese are known to have used a chariot incorporating a complex series of gears like those illustrated in Fig.2.7. Aristotle, in the fourth century B .C .wrote of gears as if they were commonplace. In the fifteenth century A.D., Leonardo da Vinci designed a multitude of devices incorporating many kinds of gears. In comparison with belt and chain drives ,gear drives are more compact ,can operate at high speeds, and can be used where precise timing is desired. The transmission efficiency of gears is as high as 98 percent. On the other hand, gears are usually more costly and require more attention to lubrication, cleanliness, shaft alignment, etc., and usually operate in a closed case with provision for proper lubrication.Gear mechanisms can be divided into planar gear mechanisms and spatial gear mechanisms. Planar gear mechanisms are used to transmit motion and spatial gear mechanisms. Planar gear mechanisms are used to transmit motion and power between parallel shafts ,and spatial gear mechanisms between nonparallel shafts.Types of gears(1) Spur gears. The spur gear has a cylindrical pitch surface and has straight teeth parallel to its axis as shown in Fig. 2.8. They are used to transmit motion and power between parallel shafts. The tooth surfaces of spur gears contact on a straight line parallel to the axes of gears. This implies that tooth profiles go into and out of contact along the whole facewidth at the same time. This will therefore result in the sudden loading and sudden unloading on teeth as profiles go into and out of contact. As aresult, vibration and noise are produced.(2)Helical gears. These gears have their tooth elements at an angle or helix to the axis of the gear(Fig.2.9). The tooth surfaces of two engaging helical gears inn planar gear mechanisms contact on a straight line inclined to the axes of the gears. The length of the contact line changes gradually from zero to maximum and then from maximum to zero. The loading and unloading of the teeth become gradual and smooth. Helical gears may be used to transmit motion and power between parallel shaftsFig. 2.9(a)or shafts at an angle to each otherFig. 2.9(d). A herringbone gear Fig. 2.9(c) is equivalent to a right-hand and a left-hand helical gear placed side by side. Because of the angle of the tooth, helical gears create considerable side thrust on the shaft. A herringbone gear corrects this thrust by neutralizing it , allowing the use of a small thrust bearing instead of a large one and perhaps eliminating one altogether. Often a central groove is made around the gear for ease in machining.(3)Bevel gars. The teeth of a bevel gear are distributed on the frustum of a cone. The corresponding pitch cylinder in cylindrical gears becomes pitch cone. The dimensions of teeth on different transverse planes are different. For convenience, parameters and dimensions at the large end are taken to be standard values. Bevel gears are used to connect shafts which are not parallel to each other. Usually the shafts are 90 deg. to each other, but may be more or less than 90 deg. The two mating gears may have the same number of teeth for the purpose of changing direction of motion only, or they may have a different number of teeth for the purpose of changing both speed and direction. The tooth elements may be straight or spiral, so that we have plain and spiral bevel gears. Hypoid comes from the word hyperboloid and indicates the surface on which the tooth face lies. Hypoid gears are similar to bevel gears, but the two shafts do not intersect. The teeth are curved, and because of the nonintersection of the shafts, bearings can be placed on each side of each gear. The principal use of thid type of gear is in automobile rear ends for the purpose of lowering the drive shaft, and thus the car floor.(4)Worm and worm gears. Worm gear drives are used to transmit motion and ower between non-intersecting and non-parallel shafts, usually crossing at a right angle, especially where it is desired to obtain high gear reduction in a limited space. Worms are a kind of screw, usually right handed for convenience of cutting, or left handed it necessary. According to the enveloping type, worms can be divided into single and double enveloping. Worms are usually drivers to reduce the speed. If not self-locking, a worm gear can also be the driver in a so called back-driving mechanism to increase the speed. Two things characterize worm gearing (a) large velocity ratios, and (b) high sliding velocities. The latter means that heat generation and power transmission efficiency are of greater concern than with other types of gears.(5)Racks. A rack is a gear with an infinite radius, or a gear with its perimeter stretched out into a straight line. It is used to change reciprocating motion to rotary motion or vice versa. A lathe rack and pinion is good example of this mechanism.Geometry of gear toothThe basic requirement of gear-tooth geometry is the provision of angular velocity rations that are exactly constant. Of course, manufacturing inaccuracies and tooth deflections well cause slight deviations in velocity ratio; but acceptable tooth profiles are based on theoretical curves that meet this criterion.The action of a pair of gear teeth satisfying this requirement is termed conjugate gear-tooth action, and is illustrated in Fig. 2.12. The basic law of conjugate gear-tooth action states that as the gears rotate, the common normal to the surfaces at the point of contact must always intersect the line of centers at the same point P called the pitch point.The law of conjugate gear-tooth can be satisfied by various tooth shapes, but the only one of current importance is the involute, or, more precisely, the involute of the circle. (Its last important competitor was the cycloidal shape, used in the gears of Model T Ford transmissions.) An involute (of the circle) is the curve generated by any point on a taut thread as it unwinds from a circle, called the base circle. The generation of two involutes is shown in Fig. 2.13. The dotted lines show how these could correspond to the outer portion of the right sides of adjacent gear teeth. Correspondingly, involutes generated by unwinding a thread wrapped counterclockwise around the base circle would for the outer portions of the left sides of the teeth. Note that at every point, the involute is perpendicular to the taut thread, since the involute is a circular arc with everincreasing radius, and a radius is always perpendicular to its circular arc. It is important to note that an involute can be developed as far as desired outside the base circle, but an involute cannot exist inside its base circle.Let us now develop a mating pair of involute gear teeth in three steps: friction drive, belt drive, and finally, involute gear-tooth drive. Figure 2.14 shows two pitch circles. Imagine that they represent two cylinders pressed together. If slippage does not occur, rotation of one cylinder (pitch circle) will cause rotation of the other at an angular velocity ratio inversely proportional to their diameters. In any pair of mating gears, the smaller of the two is called the pinion and the larger one the gear. (The term “gear” is used in a general sense to indicate either of the members, and also in a specific sense to indicate the larger of the two.) Using subscripts p and g to denote pinion and gear, respectively.In order to transmit more torque than is possible with friction drive alone, we now add a belt drive running between pulleys representing the base circles, as in Fig 2.15. If the pinion is turned counterclockwise a few degrees, the belt will cause the gear to rotate in accordance with correct velocity ratio. In gear parlance, angle is called the pressure angle. From similar triangles, the base circles have the same ratio as the pitch; thus, the velocity ratio provided by the friction and belt drives are the same.In Fig. 2.16 the belt is cut at point c, and the two ends are used to generate involute profiles de and fg for the pinion and gear, respectively. It should now be clear why is called the pressure angle: neglecting sliding friction, the force of one involute tooth pushing against the other is always at an angle equal to the pressure angle. A comparison of Fig. 2.16 and Fig.2.12 shows that the involute profiles do indeed satisfy the fundamental law of conjugate gear-tooth action. Incidentally, the involute is the only geometric profile satisfying this law that maintains a constant pressure angle as the gears rotate. Note especially that conjugate involute action can take place only outside of both base circles.Nomenclature of spur gear The nomenclature of spur gear (Fig .2.17) is mostly applicable to all other type of gears.The diameter of each of the original rolling cylinders of two mating gears is called the pitch diameter, and the cylinders sectional outline is called the pitch circle. The pitch circles are tangent to each other at pitch point. The circle from which the involute is generated is called the base circle. The circle where the tops of the teeth lie is called the dedendum circle. Similarly, the circle where the roots of the teeth lie is called the dedendum circle. Between the addendum circle and the dedendum circle, there is an important circle which is called the reference circle. Parameters on the reference circle are standardized. The module m of a gear is introduced on the reference circle as a basic parameter, which is defined as m=p/. Sizes of the teeth and gear are proportional to the module m.The addendum is the radial distance from the reference circle to the addendum circle. The dedendum is the radial distance from the reference circle to the dedendum circle. Clearance is the difference between addendum and dedendum in mating gears. Clearance prevents binding caused by any possible eccentricity.The circular pitch p is the distance between corresponding side of neighboring teeth, measured along the reference circle. The base pitch is similar to the circular pitch is measured along the base circle instead of along the reference circle. It can easily be seen that the base radius equals the reference radius times the cosine of the pressure angle. Since, for a given angle, the ratio between any subtended arc and its radius is constant, it is also true that the base pitch equals the circular pitch times the cosine of the pressure angle. The pressure angle is the angle between the normal and the circumferential velocity of the point on a specific circle. The pressure angle on the reference circle is also standardized. It is most commonly 20(sometimes 15).The line of centers is a line passing through the centers of two mating gears. The center distance (measured along the line of centers) equals the sum of the pitch radii of pinion and gear.Tooth thickness is the width of the tooth, measured along the reference circle, is also referred to as tooth thickness. Width of space is the distance between facing side of adjacent teeth, measured along the reference circle. Tooth thickness plus width of space equals the circular pitch. Backlash is the width of space minus the tooth thickness. Face width measures tooth width in an axial direction.The face of the tooth is the active surface of the tooth outside the pitch cylinder. The flank of the tooth is the active surface inside the pitch cylinder. The fillet is the rounded corner at the base of the tooth. The working depth is the sum of the addendum of a gear and the addendum of its mating gear.In order to mate properly, gears running together must have: (a) the same module; (b) the same pressure angle; (c) the same addendum and dedendum. The last requirement is valid for standard gears only.Rolling-ContactbearingsThe rolling-contact bearing consists of niier and outer rings sepatated by a number of rolling elements in the form of balls ,which are held in separators or retainers, and roller bearings have mainly cyinndrical, conical , or barrelcage.The needles are retainde by integral flanges on the outer race,Bearigs with rolling contact have no skopstick effect,low statting torqeu and running friction,and unlike as in journal bearings. The coefficient of friction varies little with load or opeed.Probably the outstanding of a rolling-contant beating over a sliding bearing is its low statting friction.The srdinary sliding bearing starts from rest with practically metal to metal contact and has a high coefficient of friction as compared with that between rolling members.This teature is of particular important in the case of beatings whcch vust carry the same laode at test as when tunning,for example.less than one-thirtieth as much force is required to start a raliroad freight car equopped with roller beatings as with plain journal bearings.However.most journal bearing can only carry relatively light loads while starting and do not become heavily loaded until the speed is high enough for a hydrodynamic film to be built up.At this time the friction id that in the luvricant ,and in a properly designed journal bearing the viscous friction will be in the same order of magnitude ad that for a that for a rolling-conanct bearing.齿轮机构齿轮机构用来传递运动和动力，通过连续啮合轮齿的正确接触，从一根轴传动到另一根轴。大约公元前 2600 年，中国人就能够使用一系列战车而闻名复杂的齿轮机构而构成的。公元前 4 世纪，亚里士多德写的齿轮好象推动的是平凡的。在公元 15 世纪，Leonardo da Vinci 设计了能与许多种类的齿轮枢结合的大量装置。与皮带和链传动相比较，齿轮传动装置更加紧凑，能高速运行，也能够被运用在要求准确定时的场合。齿轮传动的传动效率高达 98。另一方面，齿轮传动机构成本高，而且要求注意润滑、清洁度、轴的对中等等，经常用在提供准确箱体润滑的闭式情况下。齿轮机构能被分为平面齿轮机构和空间齿轮机构。平面齿轮机构被用于传递运动和动力，而平行轴间的运动和动力空间齿轮机构用于传递不平行轴间的运动和动力。齿轮的分类：1、直齿轮直齿轮有节轮表面和平行于轮的轴线的直齿轮，如图 2.8 所示。它们用于传递两平行轴间的运动和动力。两配合的直接齿面啮合在一条平行于其轴线的直线上，这意味着整个齿宽在同一时刻啮合脱开，这样在齿面上导致加载或卸载，当齿轮啮合或脱开时，结果推动和噪声就产生了。、1、斜齿轮这种齿轮的轮齿有一位角度或与其轴线旋转一定角度在平面齿轮机构中相互啮合，斜齿轮齿面相啮合于一条倾斜于轴承的直线上，啮合线的长度从 0 逐渐变化到最大再从最大变化到 0，轮齿的加载和卸载变得平稳均匀的运动和动力。人字齿轮相当于右旋齿轮和左旋齿轮并在一起，因为轮齿存在一定角度，斜齿轮产生相当大的轴间推力，人字齿轮通过相互抵消纠正了这一推力，允许其使用以推力轴承代替大推力轴承，或不同推力轴承，为了加工方便经常沿着齿轮加工一个中心槽。、2、伞状齿轮伞状齿轮是依据平截头圆锥体分配的。圆柱齿轮的节圆柱成为分圆锥，齿轮的齿的横剖面的尺寸是不同的。为了方便起见，锥齿轮的大头端部的参数和尺寸作为标准值。习惯上锥齿轮相互作用的轴彼此不是平行的，通常两轴线彼此成为 90 度，有时会比 90 度或多或少。两个相互啮合的齿轮仅仅为了变向或许有一样的齿数，又或者为了改变速度和方向而齿数不同。锥齿轮可能是直齿的也可能是螺旋形齿轮，以便我们有简单的和螺旋形的齿轮。准双曲面来自于双曲面和齿面的放置的表面。准双曲面的齿轮属于锥齿轮，但是两轴不能横断，因为轴的材料，它的齿是曲线的，轴承可以位于各齿轮的各个侧面。这种齿轮主要用在汽车后方末端是为了降低传动轴并且用在汽车踏板处。、3、蜗轮蜗杆齿轮蜗轮传动惯于传递动力和功率，它的轴既不相交也不平行，通常都是垂直的，尤其是要求获得高的齿轮减速在一定的极限运算范围内。蜗杆是螺旋的，通常为了方便起见都是顺时针方向的，如果需要的话也可是左旋方向的。按照类型，可以是单螺旋的也可以是双螺旋的，螺杆通常用来降低速度的，即使不自动锁住，螺杆也能够被驱动，所以称作回力驱动机构，为了提高速度。下面是蜗轮蜗杆传动装置的两个特点：（a）有很高的传动速度（b）后者意思指和其它种类的齿轮相比中心有高的发热性和电力传输效率。齿轮轮齿形状轮齿几何形状的基本要求提供一个准确不变的角速度，当然制造端差和轮齿变形将会在速度比上产生微小的偏差，然而可接受的齿形依据基于满足这一判剧的理论曲线得出的。满足这要求的一对配合齿轮的运动被称为共轭齿轮传动。如图 2.12 所示，共轭齿轮传动的基本定律论述为当齿轮转动时，接触点表面的公法线总是与中心线交于一点 P，这点叫节点。共轭齿轮传动原则能被各种齿形适应，目前最重要的一种是渐开线齿轮更精确地说一个圆的渐开线（与它相近的重要

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