چین پیشہ ورانہ اعلی طاقت اور لباس مزاحمت شارٹ پچ درستگی 180h-3 ہیوی ڈیوٹی سیریز ٹرپلیکس انڈسٹریل کنویئر رولر چینز اور بش چینز

مصنوعات کی تفصیل

Heavy Duty Series Triplex Roller Chains & Bush Chains

ROLLER CHAIN

Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. It consists of a series of short cylindrical rollers held together by side links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficient means of power transmission.

CONSTRUCTION OF THE CHAIN

^{Two different sizes of roller chain, showing construction.
There are 2 types of links alternating in the bush roller chain. The first type is inner links, having 2 inner plates held together by 2 sleeves or bushings CZPT which rotate 2 rollers. Inner links alternate with the second type, the outer links, consisting of 2 outer plates held together by pins passing through the bushings of the inner links. The “bushingless” roller chain is similar in operation though not in construction; instead of separate bushings or sleeves holding the inner plates together, the plate has a tube stamped into it protruding from the hole which serves the same purpose. This has the advantage of removing 1 step in assembly of the chain.}

The roller chain design reduces friction compared to simpler designs, resulting in higher efficiency and less wear. The original power transmission chain varieties lacked rollers and bushings, with both the inner and outer plates held by pins which directly contacted the sprocket teeth; however this configuration exhibited extremely rapid wear of both the sprocket teeth, and the plates where they pivoted on the pins. This problem was partially solved by the development of bushed chains, with the pins holding the outer plates passing through bushings or sleeves connecting the inner plates. This distributed the wear over a greater area; however the teeth of the sprockets still wore more rapidly than is desirable, from the sliding friction against the bushings. The addition of rollers surrounding the bushing sleeves of the chain and provided rolling contact with the teeth of the sprockets resulting in excellent resistance to wear of both sprockets and chain as well. There is even very low friction, as long as the chain is sufficiently lubricated. Continuous, clean, lubrication of roller chains is of primary importance for efficient operation as well as correct tensioning.

LUBRICATION

^{Many driving chains (for example, in factory equipment, or driving a camshaft inside an internal combustion engine) operate in clean environments, and thus the wearing surfaces (that is, the pins and bushings) are safe from precipitation and airborne grit, many even in a sealed environment such as an oil bath. Some roller chains are designed to have o-rings built into the space between the outside link plate and the inside roller link plates. Chain manufacturers began to include this feature in 1971 after the application was invented by Joseph Montano while working for Whitney Chain of Hartford, Connecticut. O-rings were included as a way to improve lubrication to the links of power transmission chains, a service that is vitally important to extending their working life. These rubber fixtures form a barrier that holds factory applied lubricating grease inside the pin and bushing wear areas. Further, the rubber o-rings prevent dirt and other contaminants from entering inside the chain linkages, where such particles would otherwise cause significant wear.[citation needed]}

There are also many chains that have to operate in dirty conditions, and for size or operational reasons cannot be sealed. Examples include chains on farm equipment, bicycles, and chain saws. These chains will necessarily have relatively high rates of wear, particularly when the operators are prepared to accept more friction, less efficiency, more noise and more frequent replacement as they neglect lubrication and adjustment.

Many oil-based lubricants attract dirt and other particles, eventually forming an CZPT paste that will compound wear on chains. This problem can be circumvented by use of a “dry” PTFE spray, which forms a solid film after application and repels both particles and moisture.

VARIANTS DESIGN

^{Layout of a roller chain: 1. Outer plate, 2. Inner plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not being used for a high wear application (for instance if it is just transmitting motion from a hand-operated lever to a control shaft on a machine, or a sliding door on an oven), then 1 of the simpler types of chain may still be used. Conversely, where extra strength but the smooth drive of a smaller pitch is required, the chain may be “siamesed”; instead of just 2 rows of plates on the outer sides of the chain, there may be 3 (“duplex”), 4 (“triplex”), or more rows of plates running parallel, with bushings and rollers between each adjacent pair, and the same number of rows of teeth running in parallel on the sprockets to match. Timing chains on automotive engines, for example, typically have multiple rows of plates called strands.}

Roller chain is made in several sizes, the most common American National Standards Institute (ANSI) standards being 40, 50, 60, and 80. The first digit(s) indicate the pitch of the chain in eighths of an inch, with the last digit being 0 for standard chain, 1 for lightweight chain, and 5 for bushed chain with no rollers. Thus, a chain with half-inch pitch would be a #40 while a #160 sprocket would have teeth spaced 2 inches apart, etc. Metric pitches are expressed in sixteenths of an inch; thus a metric #8 chain (08B-1) would be equivalent to an ANSI #40. Most roller chain is made from plain carbon or alloy steel, but stainless steel is used in food processing machinery or other places where lubrication is a problem, and nylon or brass are occasionally seen for the same reason.

Roller chain is ordinarily hooked up using a master link (also known as a connecting link), which typically has 1 pin held by a horseshoe clip rather than friction fit, allowing it to be inserted or removed with simple tools. Chain with a removable link or pin is also known as cottered chain, which allows the length of the chain to be adjusted. Half links (also known as offsets) are available and are used to increase the length of the chain by a single roller. Riveted roller chain has the master link (also known as a connecting link) “riveted” or mashed on the ends. These pins are made to be durable and are not removable.

USE

An example of 2 ‘ghost’ sprockets tensioning a triplex roller chain system
Roller chains are used in low- to mid-speed drives at around 600 to 800 feet per minute; however, at higher speeds, around 2,000 to 3,000 feet per minute, V-belts are normally used due to wear and noise issues.
A bicycle chain is a form of roller chain. Bicycle chains may have a master link, or may require a chain tool for removal and installation. A similar but larger and thus stronger chain is used on most motorcycles although it is sometimes replaced by either a toothed belt or a shaft drive, which offer lower noise level and fewer maintenance requirements.
The great majority of automobile engines use roller chains to drive the camshaft(s). Very high performance engines often use gear drive, and starting in the early 1960s toothed belts were used by some manufacturers.
Chains are also used in forklifts using hydraulic rams as a pulley to raise and lower the carriage; however, these chains are not considered roller chains, but are classified as lift or leaf chains.
Chainsaw cutting chains superficially resemble roller chains but are more closely related to leaf chains. They are driven by projecting drive links which also serve to locate the chain CZPT the bar.

Sea Harrier FA.2 ZA195 front (cold) vector thrust nozzle – the nozzle is rotated by a chain drive from an air motor
A perhaps unusual use of a pair of motorcycle chains is in the Harrier Jump Jet, where a chain drive from an air motor is used to rotate the movable engine nozzles, allowing them to be pointed downwards for hovering flight, or to the rear for normal CZPT flight, a system known as Thrust vectoring.

WEAR

The effect of wear on a roller chain is to increase the pitch (spacing of the links), causing the chain to grow longer. Note that this is due to wear at the pivoting pins and bushes, not from actual stretching of the metal (as does happen to some flexible steel components such as the hand-brake cable of a motor vehicle).

With modern chains it is unusual for a chain (other than that of a bicycle) to wear until it breaks, since a worn chain leads to the rapid onset of wear on the teeth of the sprockets, with ultimate failure being the loss of all the teeth on the sprocket. The sprockets (in particular the smaller of the two) suffer a grinding motion that puts a characteristic hook shape into the driven face of the teeth. (This effect is made worse by a chain improperly tensioned, but is unavoidable no matter what care is taken). The worn teeth (and chain) no longer provides smooth transmission of power and this may become evident from the noise, the vibration or (in car engines using a timing chain) the variation in ignition timing seen with a timing light. Both sprockets and chain should be replaced in these cases, since a new chain on worn sprockets will not last long. However, in less severe cases it may be possible to save the larger of the 2 sprockets, since it is always the smaller 1 that suffers the most wear. Only in very light-weight applications such as a bicycle, or in extreme cases of improper tension, will the chain normally jump off the sprockets.

The lengthening due to wear of a chain is calculated by the following formula:

M = the length of a number of links measured

S = the number of links measured

P = Pitch

In industry, it is usual to monitor the movement of the chain tensioner (whether manual or automatic) or the exact length of a drive chain (one rule of thumb is to replace a roller chain which has elongated 3% on an adjustable drive or 1.5% on a fixed-center drive). A simpler method, particularly suitable for the cycle or motorcycle user, is to attempt to pull the chain away from the larger of the 2 sprockets, whilst ensuring the chain is taut. Any significant movement (e.g. making it possible to see through a gap) probably indicates a chain worn up to and beyond the limit. Sprocket damage will result if the problem is ignored. Sprocket wear cancels this effect, and may mask chain wear.

CHAIN STRENGTH

The most common measure of roller chain’s strength is tensile strength. Tensile strength represents how much load a chain can withstand under a one-time load before breaking. Just as important as tensile strength is a chain’s fatigue strength. The critical factors in a chain’s fatigue strength is the quality of steel used to manufacture the chain, the heat treatment of the chain components, the quality of the pitch hole fabrication of the linkplates, and the type of shot plus the intensity of shot peen coverage on the linkplates. Other factors can include the thickness of the linkplates and the design (contour) of the linkplates. The rule of thumb for roller chain operating on a continuous drive is for the chain load to not exceed a mere 1/6 or 1/9 of the chain’s tensile strength, depending on the type of master links used (press-fit vs. slip-fit)^{[citation needed]}. Roller chains operating on a continuous drive beyond these thresholds can and typically do fail prematurely via linkplate fatigue failure.

The standard minimum ultimate strength of the ANSI 29.1 steel chain is 12,500 x (pitch, in inches)². X-ring and O-Ring chains greatly decrease wear by means of internal lubricants, increasing chain life. The internal lubrication is inserted by means of a vacuum when riveting the chain together.

CHAIN STHangZhouRDS

Standards organizations (such as ANSI and ISO) maintain standards for design, dimensions, and interchangeability of transmission chains. For example, the following Table shows data from ANSI standard B29.1-2011 (Precision Power Transmission Roller Chains, Attachments, and Sprockets) developed by the American Society of Mechanical Engineers (ASME). See the references^[8][9][10] for additional information.

ASME/ANSI B29.1-2011 Roller Chain Standard SizesSizePitchMaximum Roller DiameterMinimum Ultimate Tensile StrengthMeasuring Load25

یادداشت کے مقاصد کے لیے، ذیل میں اسی معیار سے کلیدی جہتوں کی ایک اور پیشکش ہے، جس کا اظہار ایک انچ کے حصوں میں کیا گیا ہے (جو ANSI معیار میں ترجیحی نمبروں کے انتخاب کے پیچھے سوچ کا حصہ تھا):

نوٹس:
1. پچ رولر مراکز کے درمیان فاصلہ ہے۔ چوڑائی لنک پلیٹوں کے درمیان فاصلہ ہے (یعنی کلیئرنس کی اجازت دینے کے لیے رولر کی چوڑائی سے قدرے زیادہ)۔
2. معیاری کا دائیں ہاتھ کا ہندسہ 0 = نارمل چین، 1 = ہلکا پھلکا چین، 5 = رولر لیس بشنگ چین کو ظاہر کرتا ہے۔
3. بائیں ہاتھ کا ہندسہ ایک انچ کے آٹھویں حصے کی تعداد کو ظاہر کرتا ہے جو پچ کو بناتا ہے۔
4. معیاری نمبر کے بعد ایک "H" ہیوی ویٹ چین کو ظاہر کرتا ہے۔ معیاری نمبر کے بعد ایک ہائفنیٹڈ نمبر ڈبل اسٹرینڈ (2)، ٹرپل اسٹرینڈ (3) وغیرہ کو ظاہر کرتا ہے۔ اس طرح 60H-3 نمبر 60 ہیوی ویٹ ٹرپل اسٹرینڈ چین کو ظاہر کرتا ہے۔
 سائیکل کی ایک عام زنجیر (ڈیریلر گیئرز کے لیے) تنگ 1⁄2 انچ کی زنجیر کا استعمال کرتی ہے۔ زنجیر کی چوڑائی متغیر ہے، اور بوجھ کی صلاحیت کو متاثر نہیں کرتی ہے۔ پچھلے پہیے پر جتنے زیادہ سپروکیٹ ہوتے ہیں (تاریخی طور پر 3-6، آج کل 7-12 سپروکیٹ)، زنجیر اتنی ہی تنگ ہوتی ہے۔ زنجیریں اس رفتار کی تعداد کے مطابق فروخت کی جاتی ہیں جن کے ساتھ کام کرنے کے لیے ڈیزائن کیا گیا ہے، مثال کے طور پر، "10 اسپیڈ چین"۔ حب گیئر یا سنگل اسپیڈ سائیکلیں 1/2″ x 1/8″ چینز کا استعمال کرتی ہیں، جہاں 1/8″ سے مراد سپروکیٹ کی زیادہ سے زیادہ موٹائی ہوتی ہے جسے چین کے ساتھ استعمال کیا جا سکتا ہے۔

عام طور پر متوازی شکل کے لنکس والی زنجیروں میں یکساں تعداد میں لنک ہوتے ہیں، ہر ایک تنگ لنک کے بعد ایک چوڑا ہوتا ہے۔ یکساں قسم کے لنک کے ساتھ بنی ہوئی زنجیریں، 1 پر تنگ اور دوسرے سرے پر چوڑی، طاق تعداد میں لنکس کے ساتھ بنائی جا سکتی ہیں، جو ایک خاص زنجیر کے پہیے کے فاصلے کے مطابق ہونے کا فائدہ ہو سکتی ہیں۔ دوسری طرف ایسی زنجیر اتنی مضبوط نہیں ہوتی۔

آئی ایس او معیار کا استعمال کرتے ہوئے بنائی گئی رولر چینز کو بعض اوقات آئسوچین بھی کہا جاتا ہے۔

 

ہمیں کیوں منتخب کریں۔ 

1. قابل اعتماد کوالٹی اشورینس سسٹم
2. کٹنگ ایج کمپیوٹر کنٹرولڈ CNC مشینیں۔
3. انتہائی تجربہ کار ماہرین کی طرف سے مناسب حل
4. مخصوص ایپلی کیشن کے لیے حسب ضرورت اور OEM دستیاب ہے۔
5. اسپیئر پارٹس اور لوازمات کی وسیع انوینٹری
6. اچھی طرح سے ترقی یافتہ CZPT مارکیٹنگ نیٹ ورک
7. موثر بعد فروخت سروس سسٹم

جدید خودکار پیداواری آلات کے 219 سیٹ اعلیٰ مصنوعات کے معیار کی ضمانت فراہم کرتے ہیں۔ سینئر پروفیشنل ٹائٹلز کے حامل 167 انجینئرز اور تکنیکی ماہرین صارفین کے عین مطالبات کو پورا کرنے کے لیے مصنوعات کو ڈیزائن اور تیار کر سکتے ہیں، اور OEM حسب ضرورت ہمارے پاس بھی دستیاب ہیں۔ ہمارا آواز عالمی سروس نیٹ ورک صارفین کو بروقت بعد از فروخت تکنیکی خدمات فراہم کر سکتا ہے۔

ہم صرف ایک کارخانہ دار اور فراہم کنندہ نہیں ہیں، بلکہ صنعت کے مشیر بھی ہیں۔ ہم آپ کے ساتھ ماہرانہ مشورے اور پروڈکٹ کی سفارشات پیش کرنے کے لیے فعال طور پر کام کرتے ہیں تاکہ آپ کی مخصوص ایپلی کیشن کے لیے سب سے زیادہ لاگت سے موثر پروڈکٹ دستیاب ہو۔ جن کلائنٹس کو ہم CZPT کی خدمت کرتے ہیں وہ آخری صارفین سے لے کر ڈسٹری بیوٹرز اور OEMs تک ہیں۔ جہاں ضروری ہو اور مرمت اور نئی اسمبلیوں دونوں کے لیے ہمارے OEM متبادلات کو تبدیل کیا جا سکتا ہے۔