Archive for the ‘Chain Conveyor’ Category

Increase Safety And Reduce Costs By Installation Of Conveyor System Manufacturing

Tuesday, January 12th, 2010

When faced with the need to manufacture vehicles quickly and inexpensively in a nation where the horse and buggy were the way of life Henry Ford choose to use conveyor system manufacturing and changed the course of automobile manufacturing forever. The system allowed heavy parts to be transported without injury to workers. These systems allow machinery to do work that people often find difficult.

By the’50s conveyor systems had moved their way to the food manufacturing business as evidenced when Lucy and Ethel went to work in the chocolate factory packaging chocolates.

A favorite example of a conveyor system that saves its owners money and improves the safety for workers is found in the donut chain. This system extrudes donuts from the dough and drops them into the fat to fry. The flow down the little fat river and are flipped at precisely the correct time. They continue to move on down that little river and are picked up by a metal conveyor belt when the cooking is done. This metal conveyor causes them to pass through a blanket of frosting and moves them on down the line to be packaged by the worker.

The system addresses three problems. Without the system, there would need to be a person at several stations along the line. The person shaping the donuts, the person dropping the donuts into the fat, a person to flip the donuts, another to lift them out of the fat, someone to frost the donuts and then the person to package them would all be required. Instead it only takes the one person to package those donuts.

Conveyor systems are used in many other ways in the food industry. They can be used in preparing and packaging foods or in moving foods through ovens in order to cook the food to perfection. Drink manufacturers use the machines for bottling the drinks. Snack food manufacturers use them to cook and package foods.

With heavier industries, like the automobile industry, heavy parts are easily transported with safety from station to station. Without the system moving these parts could require several workers and more expensive machinery. There is also the possibility of injury to workers along the way. The system can move parts through processes where the temperatures or chemicals used could cause injury to the worker.

As land becomes more expensive and companies build up instead of out, conveyor systems can be used to move parts from one level to another. Moving the part by elevator and with human moving could take half an hour and the conveyor can do the work in seconds.

Conveyor manufacturing systems are much safer than using forklifts or almost any other method of moving parts from one place to another.

If you want to increase productivity and safety, why not do what Ford did almost one hundred years ago. He installed a conveyor system to improve the process of manufacturing the Model T and thus he changed the auto industry forever. This system saved him money and allowed for mass production of the car that changed the way that America traveled.

Visit Wilkie Brothers Conveyors for all of your Rebuilt Conveyor Chain needs or Blue Water Mfg for other Conveyor Chain needs.

Important Factors To Consider While Selecting the Conveyor Chain Most Appropriate to Your Application

Friday, January 1st, 2010

The conveyor chain is a common sight in factories around the world and is seen in all types of situations from moving parts down the line in an automobile production plant to moving sprinklers around in an agricultural field.  If something has to get from point “A” to point “B” on a continuous basis, whether for assembly, washing, painting, inspection or storage, you can be sure a conveyor chain is at the core of the system.

The four critical factors that must be considered for optimum performance of the chain are strength, durability and fatigue and impact resistance.

Conveyor chain strength is normally measured in the quantity of pounds necessary to bust the chain on a linear plane.  This is tested by a tensile testing machine and the values of the minimum ultimate strength for each size chain are dictated by ANSI.  In the process of making the chain, the manufacturer controls its strength by the choice of material, manufacturing processes, and the hardening specs used in the components of the chain, which are its center link, side link and pin.

The integrity of the material at a certain hardness determines the ultimate strength of the chain, but a high ultimate value does not by itself indicate that it is not subject to failure.  This value rather is used for application engineering and in the decision as to what kind or size of conveyor chain should be used in various loads.

A conveyor chain’s durability value is the most subjective value to consider when comparing chains.  Factors affecting it’s durability  are lubrication, loads, chain speed, and system design among others.  A manufacturer controls only the hardness factor that impacts the other three criteria.  It is a fact that the harder the chain the higher its durability factor but along with this comes a lower resistance to fatigue and impact.  The harder the chain the less resistance it becomes to fatigue and impact.

There are options in base materials that take the above into consideration.  Standard SAE 1045 steel with a hardness of 370 offers good impact and fatigue resistance, a reasonable level of durability as well as meeting minimum ANSI strength requirements.  A hardness of 420 BHN of the same material improves its durability and strength but at the same time loses a bit of its impact and fatigue resistance.  Microtuff-15 micro alloy steel also has good wearability, higher strength value, and top impact and fatigue resistance for the same cost as the SAE 1045.

What fatigue resistance indicates is the material’s capacity to endure continuous bending, twisting and so forth without breaking apart.  This is possibly the conveyor chain’s preeminent asset or liability.  The quality of fatigue is not readily quantifiable until the material shows signs of fracture.  Modern factories have higher rates of production, heavier overall chain loads, more maze-like chain paths with tighter radius turns, and the chain is more apt to undergo more subtle bending and twisting than in years past

While the chain moves around its horizontal turns, the side load between the chain and the rollers or traction wheel makes for a subtle bending motion in the center link of the conveyor chain.  This particular movement is the catalyst for fatigue.  Should the fatigue go unnoticed and therefore, the chain is not replaced at once, the instance of failure is diminished.

The impact resistance measure of a conveyor determines it’s ability to absorb shock without breaking apart.  The harder the material is, the less it is impact resistance.  However, there are different materials having the same hardness with variable capabilities of absorbing impact and remaining intact.  A chain’s resistance to impact is a factor in many power and free systems.

In the case of loads that are often stopped and started, the chain, most particularly the pusher dog, is subject to impact failure if an impact resistant material was not used in its manufacture.  Other possible points of impact on a conveyor are the loading and unloading sites.  Similar to fatigue failures, impact failures happen with no warning, but they do not as a rule spread out as the fatigue failures do.

Considering the above four criteria is very important in choosing a conveyor chain for optimum performance.  Selecting the chain most appropriate to the particular application will prolong the systems longevity with fewer crashes.

Visit Wilkie Brothers Conveyors for all of your Rebuilt Conveyor Chain needs or Blue Water Mfg for other Conveyor Chain needs.

Considerations on Selecting the Most Appropriate Conveyor Chain for Your Application

Monday, December 28th, 2009

The universality of the conveyor chain in various applications from moving vehicles down the line in auto production to the movement of sprinklers in agriculture can be seen around the world.  Whenever something must be moved from point “A” to point “B” continuously no matter if it is to be assembled, washed, painted, inspected or heading for storage, you will undoubtedly find a conveyor as the basis of the system.

For optimum performance of a conveyor chain, four criteria are crucial – strength, durability, resistance to fatigue and resistance to impact.

The weight in pounds required to break the chain on a linear plane is the measurement that determines the ultimate strength of the chain.  The usual method of testing is by use of a tensile testing machine.  The minimum strength values for each size of chain are dictated by ANSI.  The material of which the chain is made, its manufacturing process, and hardening specifications used in making its components consisting of center link, side link, and pin are controlled by the manufacturer and determines the strength of the chain.

The ultimate strength of a chain is determined by the integrity of the material at a specific hardness.  Although a high ultimate value will not of necessity make it fail-proof.  The ultimate strength value determines what type or size of conveyor chain will be used for a variety of loads and is used mainly for application engineering.

The durability of a chain depends on a number of outside factors and is a somewhat imprecise value to use when comparing chains.  A chains durability is affected by lubrication, loads, chain speed, system design as well as many other factors.  Hardness is the only value that is controlled by the manufacturer that impacts wearability, and hardness has a huge impact on the other three criteria.   A harder chain is the more durable chain but this very hardness causes the chain to be less fatigue and impact resistant.  The harder the chain the less the resistance to fatigue and impact.

There are different base materials that offer some options.  For example, standard SAE 1045 steel at a hardness of 370 offers worthy impact and fatigue resistance, a good degree of durability, and meets minimum ANSI strength requirements.  If the same material has a hardness of 420 BHN, its strength and durability would be enhanced but some of its resistance to fatigue and impact would be lost.  As an alternative, microtuff-15 micro-alloy steel has good wearability and more strength along with excellent impact and fatigue resistance.  It also costs the same as SAE 1045.

Fatigue resistance means that the material used is able to hold up under continuous bending, twisting, etc without breaking.  It is quite possibly the conveyor chain’s most important asset or liability.  Until the material shows signs of fracture, however, the fatigue level is not readily measurable.  In today’s manufacturing world with its higher production rates, heavier loads, more convoluted chain paths with tighter radius turns, the chain is vulnerable to more subtle bending and twisting than ever.

As the conveyor  chain wends its way around horizontal turns, the side load between the chain and the rollers or traction wheel instigates somewhat of a bending motion in the center link of the chain.  The catalyst for fatigue is this bending process.  Should the fatigue not be identified, the chain will not be immediately replaced.  The incidence of failures are certain to increase exponentially.  Because of this, the harder, more durable alloy chains are not recommended for heavily loaded systems with many turns at a rapid pace.  Alloy chains work fine in straight line over and under conveyors or for slower, lighter loads on such conveyors in abrasive surroundings found in foundry cooling lines or incinerator drag lines.

The term impact resistance defines the conveyor chain’s capability to absorb shock without  breaking.   Hardness and impact resistance have an inverse relationship, although there are many materials at the same hardness which have  varying degrees of ability to absorb impact without fracture.  A chain’s impact resistance is an important factor in many power and free operations.

In loads with frequent stops and starts, the chain, in particular the pusher dog, is vulnerable to impact failure if not made out of impact resistant material.  Loading and unloading stations are other possible sources of impact.  Both impact and fatigue failures do occur without any warning.  Impact failures on the other hand do not by nature increase once they begin.

The consideration of the above criteria is very important when selecting a conveyor chain for optimum performance of a system.   If the appropriate chain is used for the specific purpose intended, the life of the system will be prolonged, and the risk of failure diminished.

Visit Wilkie Brothers Conveyors for all of your Rebuilt Conveyor Chain needs or Blue Water Mfg for other Conveyor Chain needs.

Criteria to Consider when Choosing the Right Conveyor Chain for your Application

Friday, December 25th, 2009

Conveyor chain is used throughout the world in a wide range of applications varying from sprinkler movement in the agriculture industry to moving vehicles on a production line in an automotive assembly plant. If something requires conveyance from point “A” to point “B” continually, whether it is being assembled, painted, washed, inspected, or stored for future use, chances are good that conveyor chain is at the heart of the system.

There are four critical criteria required for maximum performance of a conveyor chain.  They are ultimate strength, wearability, fatigue resistance and impact resistance.

The ultimate strength of a conveyor chain is typically measured in number of pounds required to break the chain on a linear plane. This test is typically conducted on a tensile testing machine and the minimum ultimate strength values for each size chain are dictated by ANSI.  A manufacturer controls how strong their chain will be by the material, manufacturing processes, and hardening specifications used in the manufacture of the conveyor chain’s components (e.g., center link, side link, and pin).

Although the ultimate strength of any given chain will reflect the integrity of a certain material at a certain hardness, a high ultimate value does not necessarily mean that it is impervious to failure. The ultimate strength value is used for application engineering and deciding what type or size of conveyor chain to be used for various loads.

The Wearability of conveyor chain is probably the most nebulous value to document when comparing chains. Lubrication, loads, chain speed, system design, etc., are all outside factors that impact wearability. The only value that a manufacturer controls that would impact wearability is hardness. Unfortunately hardness has a major impact on the other three chain criteria. Obviously the harder a chain is the more wearable it would be but it also becomes less fatigue resistant and less impact resistant as the hardness increases.

Different base materials offer some options in this regard. For instance, standard SAE 1045 steel at a hardness of 370 has good impact and fatigue resistance, reasonable wearability, and meets minimum ANSI strength requirements. The same material at a hardness of 420 BHN would improve its wearability and strength but lose some of its impact and fatigue resistance. Microtuff-15 micro-alloy steel on the other hand, has good wearability, higher strength, and excellent impact and fatigue resistance at the same cost as SAE 1045.

Fatigue resistance is the material’s ability to withstand continuous bending, twisting, etc. without fracturing. It is perhaps the conveyor chain’s most important asset or liability. Fatigue is not easily measurable until the material shows signs of fracture. In today’s world of higher production rates, heavier overall chain loads, more intricate chain paths, with tighter radius turns, the chain is subject to more subtle bending and twisting than ever before.

As the conveyor chain travels around horizontal turns, the side load between the chain and the rollers or traction wheel creates a slight bending motion in the center link of the chain. This bending motion is the catalyst for fatigue. If fatigue is not recognized and the chain is not replaced immediately, the frequency of failures is sure to increase at a geometric rate. For this reason it is not recommended to use harder, more wearable, alloy chain on heavily loaded systems with multiple turns and high chain speeds. Alloy chain may be well suited for straight line over and under conveyors or slower lighter loaded conveyors in abrasive surroundings such as foundry cooling lines or incinerator draglines.

Impact resistance is the conveyor chain’s ability to absorb shock loads without fracturing. There is an inverse relationship between hardness and impact resistance, but different materials at the same hardness have varying abilities to absorb impact without breaking. Impact resistance with regards to chain becomes a factor in many power and free systems.

With loads being stopped and started frequently, the chain, especially the pusher dog, is susceptible to impact failure if it is not manufactured from an impact resistant material. Other potential impact points on a conveyor are the loading and unloading stations.  Impact failures, similar to fatigue failures, occur without warning, but unlike fatigue failures, they don’t necessarily multiply.

When choosing a conveyor chain, it is important to consider the above criteria to achieve maximum performance.  Using the correct chain for a specific application increases the life of the system, while preventing failure

Visit Wilkie Brothers Conveyors for all of your Rebuilt Conveyor Chain needs or Blue Water Mfg for other Conveyor Chain needs.

Understanding Drop Forged Rivetless Chain

Tuesday, December 22nd, 2009

Drop forged rivetless chain is the universal chain used in conveyor systems.  Millions of feet are in use in thousands of different types of industrial plants throughout the world, giving steady, reliable service every day.  Roughly 90% of all conveyor chain used with overhead trolleys is of the drop forged rivetless type.  Over its life, it has replaced practically all other types of chain for this particular use.

There are three main components of drop forged rivetless chain: center links, side links, and pins.  The simplicity of the design and construction of the chain makes it easy to replace links or sections without loss of time; assembling or disassembling is a simple, speedy operation.  In addition to the main components, a variety of trolleys, attachments and pusher dogs can be used to fit the specific needs of a plant’s conveyor line.

Trolleys are wheels that mount to the conveyor chain, and allow it to ride on I-beam or in steel channel.  Attachments can be outfitted to the chain to allow parts to connect to the conveyor line and be processed.  Pusher dogs engage key areas of the system to cause specific actions to happen.

Since no tools or special equipment are needed for assembly or disassembly of this chain, the parts can be easily and quickly reversed to increase their useful life and reduce replacement cost.  At the same time, the design and construction prevents the chain from becoming disconnected in service.  This also makes installing chain a relatively easy process.  It is typically shipped in ten-foot strands, which are fed into the system, and connected to one another by the simple turn of a conveyor pin.

Drop forged rivetless chain can be used overhead, or on the floor.  When used overhead, the chain hangs from an I-beam with the trolleys above, and the load below.  Chain that is used on the floor is referred to as inverted, as the trolleys are below the chain, while the load rides above it.  The chain is propelled by conveyor drives, which engage the chain and move it through the system.  Because of its flexible design, rivetless chain will operate over irregular paths with both horizontal and vertical changes in direction.

All rivetless conveyor chains are not the same.  It is the factors of metallurgy, accurate forging, precise broaching, and controlled heat-treating which give drop forged rivetless chains their qualities.  Some common metals used in rivetless conveyor chain are high carbon steel, high alloy steel, and microtuff.  Furthermore, several finishes, such as zinc, dichromate or black diamond, can be applied to conveyor chain to allow it to perform well in many different environments.

Rivetless chain is available in the following sizes: X698, X678, X458 and X348.  The larger the chain, the heavier the load it can sustain.  Heavy-duty applications will likely call for X678 chain, which rides in 6-inch track and can have an ultimate tensile strength in excess of 125,000 pounds. Light manufacturing facilities may utilize X348 chain, which goes into 3-inch track and typically has an ultimate tensile strength of less than 40,000 pounds.

Due to its ability to meet a wide variety of needs, drop forged rivetless conveyor chain is an attractive choice to many manufacturing companies.  Furthermore, its ease of use and low maintenance costs will continue to make it an important technology in many fields.

Visit Wilkie Brothers Conveyors for all of your Rebuilt Conveyor Chain needs or Blue Water Mfg for other Conveyor Chain needs.