Category Archives: Industrial Supply

What is a Scroll Chuck?

Posted on by

A self-centering chuck, also known as a scroll chuck, uses dogs (usually called jaws), interconnected via a scroll gear (scroll plate), to hold onto a tool or workpiece. Because they most often have three jaws, the term three-jaw chuck without other qualification is understood by machinists to mean a self-centering three-jaw chuck. The term universal chuck also refers to this type. These chucks are best suited to grip circular or hexagonal cross-sections when very fast, reasonably accurate (±0.005 inch [0.125 mm] TIR) centering is desired.

 

Sometimes this type of scroll chuck has 4 or 6 jaws instead of 3. More jaws grip the workpiece more securely if it is truly cylindrical, and thin-walled work will deform less. Four jaws are also useful for square bar work.

 

There are also independent-jaw (non-self-centering) chucks with three jaws.

 

There are hybrid self-centering chucks that have adjustment screws that can be used to further improve the concentricity after the workpiece has been gripped by the scroll jaws. This feature is meant to combine the speed and ease of the scroll plate’s self-centering with the run-out eliminating controllability of an independent-jaw chuck. The most commonly used name for this type is a brand name, Set-Tru. To avoid undue genericization of that brand name, suggestions for a generic name have included “exact-adjust”.

 

Three-jaw chucks are often used on lathes and indexing heads.

 

Di Chun Iron Work Co., Ltd. is the professional manufacturer of producing scroll chuck and kinds of power chucks. If you are interested in learning further specification and what do them look like, welcome to browse our website and feel free to contact with Di Chun.

 

 

Article Source: https://en.wikipedia.org/wiki/Chuck_(engineering)

What are Metal Bond Grinding Wheels and What Benefits Do They Offer?

Posted on by

Extensively used in manufacturing diamond grinding wheels, metal bonds are manufactured utilizing three different processes: cold press, semi hot press and hot press modes.

Metal Bond Grinding Wheel
Cold press mode involves pressing the transition layer (no diamonds) and the working layer (with diamonds) of selected diamond portions to forms that on the body of the grinding wheel. These segments are then allowed to interconnect with the grinding wheel’s body via slots or teeth. Finally, cold press grinding wheels are placed into sintering furnaces where they are sintered without press.

 

Semi hot press mode improves on the cold press mode by complementing the sintering process. While grinding wheels are sintering in a furnace, applicable molds are applied and minimal to moderate pressure is added. However, any pressure applied is significantly lower than the amount of pressure applied in hot press mode.

 

Hot press mode directly sinters diamond particles in molds under preset pressure levels in sintering press machines. Diamond segments are then affixed on the grinding wheel using high frequency laser welding, high frequency welding or mosaic methods of mechanical welding.

 

Metal bond grinding wheels are produced when powdered metals or compounds containing cubic boron nitride or diamond are sintered on the wheel, resulting in exceptionally strong tools that maintain shape during rigorous use. In addition, metal bonding extends the life of grinding wheels by reducing the need for repeated dressings and continues being productive longer than market-brand super abrasives.

 

Benefits of Using Metal Bond Grinding Wheels

  • Because metal bond grinding wheels are sintered with cobalt, copper, mill, silver or stanum power, they work exceptionally well on a variety of surfaces (glass, refractories, ceramics, silicon, semi-conductors and quartz).
  • Whether used for tool cutting, glass grinding, ceramic grinding or form cutting, metal bond grinding wheels provide the longest, most superior quality of service before any type of maintenance is needed.
  • Metal bond offers the ability to perform outstanding interrupted cuts while retaining the tool’s original dimensions even during the most energetic grinding actions, including centerless, cylindrical, creep feed, deburring and cutoff applications.
  • Although resin bonds are more commonly used than vitrified or electroplated bonds, these bonds do not offer the hardness or wheel retention properties exhibited by metal bond grinding wheel.

 

As one of the most frequently seen machines in manufacturing plants requiring grinding applications, centerless grinders especially benefit from metal bond grinding wheels because of the slow, precise pace of material removal method demanded of these machines. Additionally, super abrasive centerless grinders necessitate powerful wheels such as metal bond grinding wheels that can effectively make predetermined alterations to products while reducing quality control issues that may arise if lesser quality wheels are used.

 

Best Diamond Industrial Co., Ltd. is the professional manufacturer of metal bond grinding wheel & CBN wheels. If you are interested in learning more information about grinding wheels or related products, welcome to contact with Besdia directly!

 

 

Article Source: http://blog.cdtusa.net/what-are-metal-bond-grinding-wheels-and-what-benefits-do-they-offer

Optimum Flow Control Contributes Towards Reducing Manufacturing Costs

Posted on by

Oil and gas companies around the globe face the challenge of increasing production and delivering quality products while reducing resources and manufacturing costs. Process control has a financial impact and so reducing process variability is, therefore, a key factor in maximizing quality output and reducing costs. Comprehensive studies of control systems have shown that up to 80% of control loops have not performed satisfactorily in reducing process variability. In most instances, the control valve was found to be the major cause of the problem. Despite this, the impact of the flow control valve on dynamic performance is often overlooked.

 

Optimum flow control is imperative; choke and control valves are subject to a variety of technical phenomena and careful selection of the right control valve for each application is crucial.

 

Superior design features include the valve material, which should be resistant to the chemical composition of the flow medium. For example, discs and internals made of solid Tungsten Carbide, renowned for its erosion and cavitation resistant properties. Industrial diamond facings inserted on the discs have also produced some very good results under severe conditions. The sealing surface must not be in contact with the flowing medium to ensure seat tightness can be guaranteed for a longer period of time. The construction of the internals should ensure that the downstream of the back disc is abrasive resistant. This removes the majority of cavitation and erosive material from the sealing surfaces as well as from the valve body. The design of the internals must be able to absorb turbulence in the flow so that the outgoing flow is more laminar. Rotating choke disc valves are recommended for extremely severe applications.

 

Flow control valves are also optimized by using different shaped and sized throttling orifices in the rotating discs. This affects the Cv value of the valve and has a crucial impact on process control. The right valve size and trim must be chosen to match the process conditions.

 

For both new and existing applications, to ensure downtime is kept to an absolute minimum and additional costs are not incurred, flow control valves should ideally be engineered to fit with no modifications to existing pipework. This also ensures that any replacements can be made efficiently.

 

Ultimately, these design features coupled with repairable internals and easy maintenance maximize production output, lower life-cycle costs and extend the mean time between failures, providing an overall reduction in total cost of ownership.

 

Found in 1984, ASHUN has established a fine reputation worldwide. Our professional R & D team develops new products continuously to meet our customers’ needs. If you need more information about flow control valves or other valves, welcome to browse our website or contact with ASHUN directly!

 

 

Article Source: http://EzineArticles.com/7478601

Oil Seals: The Mark of a Well Oiled Machine

Posted on by

While they are often called many different names, oil seals, grease seals, fluid seals, and dirt seals all accomplish the same task: they have the very important job of closing the spaces between stationary and moving parts in all kinds of mechanical equipment. For everything from automotive, industrial, and agricultural equipment to manufacturing equipment and machine tools – oil and grease seals are an absolute necessity in the modern world when it comes to attaining the level of performance and efficiency that helps provide us with the many vehicles, products, and services we benefit from every day.

 

The very vital components of all kinds of bearings, from angular contact bearings to cylindrical roller bearings are all protected by oil seals, to keep their precisely constructed assemblies safe and reliable at all times – in even some of the harshest applications.

 

In addition to actually closing the spaces and gaps in various machines, tools, and vehicles, grease seals also provide critical protection against harmful contamination. With the help of oil seals, what needs to stay in the machine (such as lubrication) does so, and what needs to stay out of the machine (dirt, debris, and other contaminants) is kept away from its hardworking and often-delicate parts and components.

 

Simultaneously and specifically in the case of machine tools and machine components, oil seals do much more than prevent the ingress of abrasives, moisture, and contaminants. They also ensure that various liquids do not mix together, such as oil based lubricants and water.

 

There are many grease oil seal designs engineered specifically to meet the needs of various industries. While it might seem like “a seal’s a seal” the actual design, materials, and configuration used can make a significant difference in certain applications. For example, some seal types are engineered to eliminate torque and friction, this enables the seal to move with the bearings and the other machine components while simultaneously protecting against contamination. Other seal varieties are engineered with greater efficiency in mind. Regardless of the requirement, the industrial world has come up with a number of designs and concepts to deliver the performance needed for virtually every application. Some of these seal types include:

 

  • Light duty deals
  • Heavy duty seals
  • O-ring seals
  • V-seals
  • Labyrinth seals
  • Multiple lip seals
  • And more…

 

Whether you’ve ever even considered oil and grease seals before. They have undoubtedly affected your life and the things you use every day. So next time you think about how all the things surrounding you are manufactured – consider the impact of one tiny component: the oil seal.

 

Lian Yu specializes in the design, production and distribution of oil seals and special seals for vehicle and mechanical applications. Our product lines include bus oil seals, oil bath seals, industrial oil seals, special seal, rubber seals, vehicle oil seals, etc. If you have any interest or question, please do not hesitate to contact Lian Yu Oil Seals.

 

Article Source: http://EzineArticles.com/6909477

What Is a Flanged Ball Valve?

Posted on by

Based on the ball-socket design, the ball valve is an in-line device shaped like a ball with an orifice through its center. When oriented correctly, the ball valve allows product to flow through easily. By grabbing the handle and turning the ball perpendicular or sideways, an individual can stop the flow. Found in almost every industrial environment, a flanged ball valve helps to control the flow rate through any plumbing application. The flanged ball valve is similar to the standard ball valve, but has mating connections or flanges that allow for quick and easy replacement of a damaged valve.

 

For instance, a valve without flanges would require an individual to manually cut piping and then reconnect it with a new valve in place. This reconnection can introduce additional hazards, as well as increased costs. In other words, some plumbing connections might require welding, soldering, or machining threads onto the ends of pipes for threaded applications.

 

When replacing a flanged ball valve, an individual should look for the bolted connections on either side of the valve. Loosening and removing the bolts from the flanges will allow the new ball valve to replace the broken ball valve. The modular design of flanged ball valves lends to their popularity, since a new flanged ball valve can bolt right into place of an old one. This ease of replacement is why flanged ball valves are commonly used when rapid repairs are essential.

 

A variety of flanged ball valves are available to cover nearly any application. Regulations exist to govern the varying sizes one may encounter. In the United States, for example, the American Society of Mechanical Engineers (ASME) governs the regulations, or codes. These regulations ensure that one flanged ball valve bears the same specifications as another, even if created by different manufacturers. The fact that one ASME flanged ball valve can replace another of the same size increases the interchangeability.

 

Valves come in many different configurations, such as the knobs on the kitchen sink, which are typically ball valves. These are generally found at some midpoint in a typical plumbing configuration. The best application for a ball valve is to quickly and easily stop product from flowing through pipes or plumbing, allowing for repairs to take place. A flanged ball valve has a variety of plumbing applications, mostly industrial, yet features the simple operation of the un-flanged variety, which requires merely moving a handle one quarter of a turn. In this model, flanges on either side of the actual valve make replacements of a broken valve relatively easy.

 

Wellgrow Industries Corp. is the professional ball valve and gate valve manufacturer in the industry. We offer a variety of valves likes flanged ball valve, globe valve, butterfly valve, diverter valve and so on products. If you are interested in learning further specification and details about flanged ball valve series, welcome to browse Wellgrow’s website or contact with us directly!

 

Article Source: http://www.wisegeek.com/what-is-a-flanged-ball-valve.htm

Important Components in Fluid Power Industry – Hydraulic Valves

Posted on by

Hydraulic valves are essential as they help control the flow of any liquid specifically, oil, in the system. Choosing the most suitable valve(s) is crucial to any hydraulic system. It comes in different sizes and types depending on the pressure of the system as well as the flow rate.

 

3 Main Classifications of Hydraulic Valves

 

There are 3 main classifications of hydraulic – directional, pressure and flow control. Directional are used to control the fluid’s direction from the start to the end. Pressure valves however are used when a specific pressure level is required. The flow controls are used to control the flow rate of the fluid in the system.

 

Other Types

 

Aside from the main classifications, there are special hydraulic valves that are used dependent on the requirement. Some examples would be multi-block directional, modular, cartridge, electro-hydraulic servo, electro-hydraulic proportional/digital, micro-hydraulic and water pressure control.

 

Multi-block directional ones are composed of a main valve with several valves including a directional, a pressure and a check valve that is used to centralize control of the machine. The safest and most environmental friendly valve on the other hand is the water pressure valve which is used to control water in many water hydraulic systems.

 

4 Ways of Valve Installation Connection

 

Hydraulic valves are essential to a complete system. That being said, there are four different ways that valves are installed and connected – threaded, modular, sandwich plate and cartridge.

 

  1. Threaded:

These valves are usually used for small flow systems as they are lightweight. This valve is very popular and can be mounted along pipelines.

 

  1. Modular:

Modular valves are often used with modeling and pressing machines as well as with hydraulic power units. The valve makes use of valve sub-plate to connect with pipelines.

 

  1. Sandwich:

These valves are flexible as one can use it as a single unit or as part of the hydraulic oil connection. Often, the valve is sandwiched between a direction control and a sub-plate to connect with the pipe system.

 

  1. Cartridge:

Cartridges are divided into two different styles – cover plate or a two-way cartridge valve/threaded which can be two or more cartridges. The valves are made with sleeves, seat, spring, spools and sealing rings. Once all the parts are assembled, the valve is then inserted into a valve cavity. The cavity helps protect the parts inside making it suitable for heavy machine use.

 

These are just a brief overview of the different types of valves and hopefully provide readers an idea helping them make smart decisions later on.

 

Ashun was established in 1984 as a manufacturer for hydraulic and pneumatic products; we design and develop high quality and competitive hydraulic valves and pneumatic valves. We also offer customization service. Welcome to contact with Ashun to learn more information about cylinders and valves.

 

 

Article Source: http://EzineArticles.com/8967413

What is a Globe Valve and Where are They Used?

Posted on by

Globe valves are linear motion valves that are widely employed to stop, start and throttle flow. In this article, we will have a simple introduction about globe valve function, advantages and disadvantages, and common applications of globe valves.

 

Globe valves are designed with a stem that moves up and down to regulate flow inside the valve, a disc (ball, composition, or plug) and seat, which is generally screwed into the valve body. Seats are designed in plane parallel or inclined to the line of the flow. These types of modulating valves are most commonly used to valve throttle, open or close flow in a system. The three basic globe valve body designs are Wye, Tee and Angle.

 

Advantages and Disadvantages of Globe Valves

 

Advantages:

 

  • Good shutoff capability.
  • Moderate to good valve throttling capability.
  • Shorter stroke (compared to a gate valve).
  • Easy to machine or resurface the seats.
  • Can be used as a stop-check valve.

 

Disadvantages:

 

  • Higher pressure drop (compared to a gate valve).
  • Requires greater force or a larger actuator to seat the valve.

 

Typical Globe Valve Applications

 

The following are some of the typical applications of globe valves:

 

  • Cooling water systems.
  • Fuel oil systems.
  • Feedwater or chemical feed systems.
  • Boiler and main steam vents and drains.
  • Turbine lube oil system and others.

 

NICO Valves Corp. is a leading industrial valve manufacturer in Taiwan and China and has been exporting this line of products for more than 20 years to all over the world.

 

We have full qualification for manufacturing widest kind of industrial valves in all common sizes & customized sizes, and available in ANSI, JIS, DIN standards. Its products includes: Gate, Globe, Check, Ball Valve, Knife Gate Valve, and Y-strainer. If you need more information about globe valves and other industrial valve series, welcome to browse NICO’s website or contact with us directly for further details!

 

 

Article Source: http://www.bmengineering.co.uk/news/globe-valves/what-is-a-globe-valve-and-where-are-they-used

 

Understanding CNC Collet Chucks

Posted on by

When considering the purchase of a CNC lathe or turning center, it is important to ensure that the workholding system is matched to both the machine’s capabilities and the type of work that it will be doing. For example, the workholding system for a large-bore oil-patch lathe that will be machining pipe threads is probably not going to be the right solution for a high-speed multitasking machine making hip joints.

 

Many CNC lathes and turning centers come equipped from the factory with a standard workholding system consisting of a three-jaw power chuck, a hydraulic actuating cylinder and a drawtube. The hydraulic cylinder is fixed to the rear end of the machine’s spindle, while the chuck is mounted to the front side, or working side, of the spindle. These two components are typically connected together via the hollow steel drawtube that passes through the spindle bore.

 

The opening and closing of the chuck jaws is accomplished through the axial motion of the hydraulic actuator’s piston. As the piston slides back and forth, the drawtube moves in unison, driving a wedge-shaped plunger within the chuck body. This plunger converts axial motion to radial motion, causing the jaws to open and close. The amount of gripping force that the jaws apply to a workpiece is directly related to the actuator output force and is easily regulated with a pressure valve.

 

As a universal workholding device, a three-jaw chuck functions well for many common turning applications. It can hold a range of part sizes is capable of operating at reasonable rotational speeds and achieves good accuracies—particularly when the jaws are bored in place.

 

However, there are many applications where a jaw chuck is not the best workholding option, which has led to the development of a range of alternative solutions. The most common among these is the CNC collet chuck.

 

A CNC collet chuck mounts to the working side of a CNC lathe spindle in the same manner as a three-jaw chuck and uses the machine’s existing hydraulic cylinder and drawtube for actuation. The installation of a collet chuck usually requires the fitment of an intermediate adapter between the chuck and drawtube to compensate for thread and position disparities. This adapter is custom machined for the specific lathe/chuck combination and is normally included in the price of the collet chuck.

 

Choosing the Right Collet Chuck

 

Choosing the right collet chuck begins by identifying the spindle nose of the machine on which the chuck will be mounted. All CNC lathe spindle noses follow international standards that clearly define the mounting interface dimensions. Common spindle nose configurations for the North American market include A2-6, A2-8, and 140 mm.

 

The next step is to determine the chuck’s required capacity, based upon the size of the parts that need to be held. For bar feeding applications, it is customary to match, or slightly exceed, the machine’s drawtube bore size.

 

Once the spindle mount and required capacity have been identified, the selection can be further narrowed based on specific features and benefits of the various models, including pullback versus dead-length operation; external clearance dimensions; RPM capability; and setup time requirements.

 

When properly matched to a machine, bar feeder and application, CNC collet chucks provide an economical and effective way of holding material less than 4 inches in diameter. Because collet chucks are generally matched with a bar feeder, some of which have magazine storage and are designed to maintain consistent gripping force at high speeds, they are the workholding choice for lights-out operations.

 

Di Chun Iron Work co., Ltd. is the experienced collet chuck manufacturer in the industry. We also provide a variety of quality power chucks, hydraulic cylinders, and chuck jaws. If you need more information about collet chucks and more products, welcome to visit our website or contact with Di Chun directly!

 

Article Source: http://www.productionmachining.com/articles/understanding-cnc-collet-chucks

 

Planetary Gearbox: Applications and Advantages

Posted on by

Planetary gearbox is named so due to its resemblance to the solar system. The components of a planetary gearbox include a sun gear, ring gear and planetary gears. The sun gear is the central gear which is fixed in the center, ring gear (annulus ring) which is the outer ring with inward-facing teeth, and the planetary gears which rotate around the sun gears and mesh with both the sun and ring gear.

 

The sun, ring and planetary gears of a planetary gearbox are constructed of aluminum, stainless steel or brass. The material used varies depending on the manufacturer.

 

Note: Gears made from steel materials can be noisy when coming into contact with other gears and also make them prone to wear.

 

Applications of Planetary Gearboxes

 

Planetary gearboxes are used in applications requiring low backlash, compact size, high efficiency, resistance to shock, and a high torque to weight ratio.

 

  • Slewing Drives
  • Lifts
  • Cranes
  • Machine Tools
  • Automotive

 

Advantages of Planetary Gears

 

  • High power density
  • Compact
  • Highly efficiency in power transmission
  • Greater stability
  • Load distribution among planetary gears

 

Disadvantages of Planetary Gears

 

  • High bearing loads
  • Complex design
  • Inaccessibility

 

Jia Cheng manufactures planetary gearboxes that are applied in conveyor drives, winch drives, mixers, swing drives, wheel drives, augers and numerous other types of applications. They were specifically developed for use with state-of-the-art technology, providing tight integration of the motor to the unit. Our precision planetary gearbox provides a number of advantages, such as in servo control applications, good mechanical rigidity, accurate and precise positioning, in operation with low institutional backlash, high efficiency, high input torque, smooth operation, low-noise and other features.

 

If you are interested in learning more details about planetary gearbox, welcome to visit the website of Jia Cheng and feel free to contact with us.

 

Article Source: http://www.anaheimautomation.com/manuals/forms/gearbox-guide.php#sthash.jpzn9pEh.dpbs

 

A Discussion on Hand Tree Saws, Pruners, and Other Arborist Equipment

Posted on by

As a dedicated arborist, you need to make sure you have the right tools to perform your job correctly, safely and utilizing your time. Of course, you want to keep the trees you are working in healthy and looking good. That means getting your hands on the best tree pruner, hand tree saw, and other arborist equipment. After all, the difference between doing a good job and a great job not only requires your skills but also your tool selection. Don’t let anyone tell you otherwise.

 

The Difference between Types of Tree Saws

 

When shopping for hand tree saws, you will come across various types of teeth and shapes of blade. These are not mere differences in aesthetics. Each has its own functional purpose. Here is a quick breakdown to guide you in selecting the right saw for your job:

 

  • Curved blade – Do you need a bit of control when cutting branches in tight areas? Do you need to cut quickly and speed up the job? Then this is the piece of arborist equipment for you.
  • Straight blade – A smoother cut at a slower pace than the curved blade. Hey you have to give a little to get a little right? Well, with the straight blade you also get the ultimate control.
  • Blades with gullets – Need something for bind free cutting? This is your ticket.
  • Fine teeth – Delicate cuts for smaller pieces of wood require smaller teeth. They will give you that beautiful, manicured look.
  • Large teeth – Obviously, these teeth come in handy when cutting larger branches. They work faster as you are not as concerned about making the cut perfect for the eye to see.

 

As you use your tree saw, keep in mind that you aren’t using a traditional hand saw. The term “saw” may imply that you move the piece of equipment back and forth to cut the wood. Not the case here whatsoever. Instead, make sure you use a downward stroke to cut the limb in one motion. Having trouble? Perhaps you need to replace your blade. They wear down faster than you might think making cutting more difficult.

 

Pruning Arborist Equipment

 

Poles, sheers, loppers-what are they and what are they for? Well, first of all you have the pole, which allows you to reach branches at various heights. Many arborist equipment suppliers allow you to build your own pole kit. That means you choose the head, base, and middle section to piece together for your required length. Most poles have interchangeable saw or pruner heads. Pruner poles come in wood, fiberglass landscape series, fiberglass professional series, fiberglass telescoping series and fiberglass dielectric series, which are poles that are foam filled for working around electricity. Silky Hayauchi poles extend to 21’ and come with saw blade only. The Silky Hayate extends to 20′ and is a saw blade only.

 

Sheers and loppers that are sold in arborist stores are of professional grade. They are for people who want an easier tool to use with continued performance year after year. Marvin brand shears and loppers are made from forged steel. These tools are not only great for the professional arborist and landscaper but general gardeners will appreciate their performance and lasting quality.

 

Remember, as a dedicated arborist, or even a power gardener, you need to make sure you have high quality arborist equipment.

 

Chan Long Enterprise Co., Ltd. specializes in producing hand saws used in PVC plumbing, carpentry, interior decorating, making freight pallets and tree pruning. Hand tree saw series is one of popular products in Chan Long. Welcome to visit our website and feel free to contact with Chan Long to learn more information about hand tree saws and pruning saws.

 

 

Article Source: http://EzineArticles.com/6502566