Category: Chains and sprockets

The main reasons for dynamic loads generated by chain sprockets and chain drives during operation are

(1) The chain speed and the angular velocity of the driven sprocket change periodically, thus generating additional dynamic loads. The greater the acceleration of the chain, the greater the dynamic load will be. As can be seen, the higher the rotational speed of the sprocket, the larger the pitch of the chain and the smaller the number of teeth of the sprocket, the dynamic load will increase. (2) The velocity of the chain along the vertical direction also changes periodically, which makes the chain vibrate transversely, and this is also one of the reasons for the dynamic load of chain transmission. (3) When the chain link enters the sprocket, the chain link and the sprocket...

The main forms of failure of roller chain drives

The main failure forms of chain transmission are as follows: (1) Fatigue damage of chain plate Chain will be fatigued after a certain number of cycles under the repeated action of loose side tension and tight side tension. Under normal lubrication conditions, fatigue strength is the main factor that limits the load carrying capacity of chain transmission. (2) Impact fatigue damage of roller sleeve The impact of chain transmission is firstly borne by roller and sleeve. Under repeated impacts, after a certain number of cycles, the roller and sleeve...

Heat treatment of 45 gauge steel for gear sprockets

According to the requirements of the sprocket gear: if the impact force is small in the case of small can be its surface carburizing, nitriding and other technologies! So that the surface hardness is higher, and the matrix hardness is lower, wear resistance is good, and not easy to fracture. If the impact load is large, it is due to the tempering treatment, that is, high temperature tempering. 45# steel quenching temperature in about 580 degrees, holding time has a formula, according to your equipment, the size of the workpiece, shape, and then quenching, and then with about 500&#8...

Analysis of the design calculation of roller chain drive

1. Failure of chain transmission 1) Fatigue damage of chain When the chain is working, the chain on both sides of the sprocket is tensioned and slackened at the same time. The chain is constantly moving from the loose side to the tight side, so its components are working under variable stress. After a certain number of cycles, the chain plate will be fatigued and broken, or the surface of sleeve and roller will be fatigued and pitted (impact fatigue caused by polygon effect). Therefore, the fatigue strength of chain becomes the main factor in determining the load bearing of chain drive...

Analysis of the treatment of different materials of sprockets and gears

The materials used for making sprockets and gears are generally based on the purpose, and the materials used are gray cast iron, low carbon steel, medium carbon steel, low carbon alloy steel, medium carbon alloy steel, etc. The materials used are as follows. (HT20-40, HT25-47, HT30-54, 45# steel, 40Cr, 40MnB, 15, 20, 20Cr, 18CrMnTi, 35CrMo) The heat treatment of the gears made of gray cast iron material is de-stressed annealing, the gears made of low carbon steel material are carburizing quenching, the gears made of medium carbon steel material are high frequency quenching, some are medium temperature tempering, some are ...

Chain wheel chain in the scraper conveyor card chain or broken chain cause analysis

Failure: One of the main functions of the scraper conveyor in the synthesized mining face is to transport the lumps of coal cut by the coal mining machine, and this function is realized by the chain installed on the scraper conveyor. The chain itself is an elastomer, and the uncertainty of the amount of coal cut by the coal mining machine leads to inconsistency in the weight of the coal blocks carried by the scraper conveyor chain. After a long time of operation, the chain of the scraper conveyor will slacken, if not dealt with in time, it will lead to safety accidents such as broken chain, stuck chain, stacked chain, etc., and in serious cases, it will affect the...

Analysis of the simple calculation method of sprockets

First, the number of teeth of the sprocket Z is calculated according to the transmission ratio ι: ι = n1/n2 = Z2/Z1 where: n1: small sprocket rotational speed n2: large sprocket rotational speed Z1: small sprocket teeth Z2: large sprocket teeth. Second, the sprocket's indexing diameter of the circle D D = P / [sin (180 degrees / Z)], sprocket is not more than gears, as long as you give the "number of teeth, the row and the type of chain" can be. The number of teeth, the number of rows and the type of chain can be given. Because the tooth type of the sprocket and some other important dimensions and so on...

The main forms of failure of roller chain drives

The main failure forms of chain wheel and chain transmission are as follows: (1) Fatigue damage of chain plate Chain in the repeated action of loose side tension and tight side tension, after a certain number of cycles, the chain plate will be fatigue damage. Under normal lubrication conditions, fatigue strength is the main factor that limits the bearing capacity of chain transmission. (2) Impact fatigue damage of roller sleeve The impact of chain transmission is firstly borne by roller and sleeve. Under repeated impacts, after a certain number of cycles, the roller...

Analysis of gear design to take full account of process issues

Gear products, because of their special characteristics, must be designed to take into account the effects of their blanks, machining, heat treatment and testing. Manufacturing-testing integration can optimize materials and processes, quantitative evaluation, help decision-making, and improve product power density. Especially for arc gear bevel gears, because of its tooling for non-standard design, the same series as far as possible to achieve generalization and serialization. In addition, gear design, but also focus on its heat treatment deformation of the impact, such as not to make the top of the tooth is too sharp, and the root of the tooth...

Finishing of gear sprockets and racks

Current industrial applications of gear finishing methods are mainly shaving, grinding, extrusion, research and honing. Shaving is in the shaving machine with shaving cutter shaving, is a method of gear finishing, shaving cutter is equivalent to the tooth surface opened a lot of edge of the helical gear. It drives the relative rotation of the gear being processed, as staggered shaft gear meshing, relying on the relative sliding on the tooth surface, shaving cutter cut off a very thin layer of metal on the tooth surface, to complete the gear finishing, shaving machine skateboard adjustments to ensure that the gears...

Double chain tooth drive roller conveyor, how to determine the roller between

比如双链牙传动的滚筒输送机,该如何确定滚筒之间的中心距呢? 当然,首先应按结构要求初步确定中心距。但结构要求的中心距不一定符合链节长度计算的结果,所以需要计算完成后需根据实际链节数量反过来再调整中心距尺寸。圆整后的链节数量宜取偶数,这是为了避免过渡链节,有了过渡链节,能承受的载荷要小20%左右。 左右两…

Analysis of the unevenness of motion in chain drives

链条进入链轮后形成折线,因此链传动的运动情况和绕在正多边形轮子上的带传动很相似,见图9。边长相当于链节距p,边数相当于链轮齿数z。链轮每转一周,链移动的距离为zp,设z1、z2为两链轮的齿数,p为节距(mm),n1、n2为两链轮的转速(r/min), 则链条的平均速度v(m/s)为 v=z1pn1/60*1000=z2pn2/60*1000             …

Processes included in the machining cycle of gears

链轮齿轮加工是一个极为复杂的过程,只有运用正确的技术,才能使高效生产成为可能,生产过程中的每个部分也都必须达到极为精确的尺寸。 齿轮的加工周期中包括了普通车加工→滚齿加工→插齿加工→剃齿加工→硬车加工→磨齿加工→珩磨加工→钻孔→内孔磨削→焊接→测量,为这个过程配置合适的装夹系统显得尤为重要,接下来我们就介绍各…

Analysis of rack manufacturing process methods and control measures

(1)粗加工 本序是从毛坯转化成半成品的过程。为了既降低成本又提高加工效率,安排在捷克斯柯达W200H数显落地镗床上,采用φ 200mm刀盘、φ 315mm三面刃铣刀和φ 25mm刀盘进行加工。首先采用φ 200mm刀盘加工齿条的6个面,单面留10mm加工余量,然后用万能角度头上φ 315mm三面刃铣刀,沿齿形轮廓开出直槽,再将工件侧立,用φ …

The use and maintenance of garage sprocket chain drive

正确使用和维护链传动对减少链的磨损,提高链传动的使用寿命有决定性的影响。使用和维护应注意以下几点: 1、合理的控制加工误差和装配误差 合理控制节距误差(规定节距与实际节距之差)应小于2%;两链轮轮齿端面间的偏移(即链轮偏移)应小于中心距的2%;两轴应平行,否则会导致链的滚子对齿面的歪斜,由此产生很高的单边压力…

Causes and consequences of root cut in gears

产生根切的原因:当刀具齿顶线与啮合线的交点超过啮合极限点N1,刀具由位置Ⅱ继续移动时,便将根部已切制出的渐开线齿廓再切去一部分。 根切的后果:产生严重根切的齿轮,一方面削弱了轮齿的抗弯强度;另一方面将使齿轮传动的合度有所降低,这对传动是十分不利的。产生根切的原因:当刀具齿顶线与啮合线的交点超过啮合极限…

Analysis of magnetic gear product features dust-free environment

什么是磁齿轮? 磁齿轮(Magnet Gear)又称磁力轮,是利用磁铁的吸力和斥力相互作用的原理,非接触的动力传递装置。 产品特点无尘环境:利用磁力,在非接触状态下,可以利用扭力传送,在需要无尘环境的真空内传送产品。 气体低排:大型机器至真空机内,为了减排气体,根据特殊的表面处理,可以在10-5PA的环境中使用。 超低…

Arrangement, tensioning and lubrication of sprocket chain drive

1、链传动的布置 链传动一般应布置在铅垂平面内,尽可能避免布置在水平或倾斜平面内。如确有需要,则应考虑加托板或张紧轮等装置,并且设计较紧凑的中心距。 2、链传动的张紧 目的:避免在链条的垂度过大时产生啮合不良和链条的振动现象;同时增加链条和链轮的包角。当两轮中心连线倾斜角大于600时,通常设有张紧装置。 张…