Screw Threads and The Threading Operation...

Screw threads are not a new invention. This device, that is responsible for such things as screw conveyors, dates back to the Greek scientist and mathematician Archimedes (c. 287 BCE- 212/211 BCE). The stated date of invention is 250 BCE. From then on, wooden screws were the norm. Artisans used their skills to produce them by hand until the 1797 when Henry Maudslay (1771-1831), an English mechanical engineer became the founder of the machine-tool industry by inventing the screw cutting lathe. This made uniformity in screws and future threading operation technology more than a possibility. Screws and Standardization Until Maudslay manufacturers produced screws with a distinct lack of uniformity in screw threads. The number of threads varied dramatically from manufacturer to manufacturer making any standard impossible to achieve. However, in spite of Maudslay’s work, the situation remained chaotic until World War I broke out. In that era, the American National (AN) thread form was established. It remained the standard until World War II of all major threads produced in America. However, around the globe, not all conformed to the AN standard. During World War II and American, British and Canadian allies worked on tank and other military equipment construction, issues of compatibility arose. The screws were not interchangeable. These presented problems that the countries did not overcome until following the cessation of the war. In 1948, a new standard arose. This, agreed upon by many countries, became known as the Unified thread form. It is in universal usage. It also affects what products emerge from the threading operation of a machine shop. What Exactly Is Thread Turning?  Thread turning is, at its most basic, the production of threads – male or female. It involves the use of such tools as universal lathes and CNC machining....

Reasons Firearm Finishing Really Matters...

The firearms of today are a far cry from those manufactured even in the last decade. Today, precision components and new technology allow the use of different alloys and different finishing options to create a weapon that is more accurate, lasts longer and has lower levels of maintenance requirements. When thinking about firearm finishing, remember each component is finished, it is not just the exterior appearance and surface that goes through the process. With each part of the weapon more accurately produced the entire system operates more smoothly. This not only adds to the accuracy of the weapon but also lowers wear and tear on internal parts because of incorrect fit or surface irregularities causing friction during firing. Limiting the Need for Lubrication Finished parts are free from even minor surface irregularities, burrs and rough areas. The quality of the finish will depend on the method used as well as the choice of the media and the process. The smoother the surface the less need there will be for lubrication for the weapon’s action. This will allow the gun to be fired more between cleanings and lubrication. Without the excessive oil less dirt and debris will not collect in the moving parts of the weapon, further reducing wear. Less friction in the weapon allows for faster chambering of the round and smoother action of the bolt. This simple advantage of firearm finishing leads to fewer problems when firing weapons, particularly with the semi-automatic and automatic weapons. This also means a faster cyclical rate and less chance of heat issues becoming a problem when firing multiple rounds. For military weapons, this is a critical factor. Corrosion Protection With efficient and effective firearm finishing on all parts and components the weapon life extends significantly, as does...

Metal Fabricators: Basic Concepts Of Metal Fabrication...

Today’s industries rely on metal fabricators to provide them with the components they require to produce high quality, reliable products. Metal fabrication shops work hard to provide a variety of services to their customers. Some shops are generalists. Others are specialists in certain areas. Some choose to handle custom metal fabrication only. Defining Metal Fabrication Metal fabrication is the act of designing, constructing and even repairing diverse metal components or entire products. The parts the shops work on can be small or large. They may be part of a small batch or a large run. The initial work may be even be a prototype. It can also be a familiar mass-produced component produced and reproduced several times before. Metal fabrication takes raw metal. It then prepares it for the actual work. Upon finishing cleaning and other related aspects, it turns it into the desired form through one or more techniques based. The guidelines are both the requirements of the customer and set specifications. When it comes to fabrication work, a shop may perform all or some of the following tasks:  * Assembly  * Bending  * Brazing  * Coating: Including powder coating or painting  * Casting  * Cutting – Including CNC enabled devices, laser or plasma systems  * Design/modeling  * Detailing  * Folding  * Forming – automated versions include CNC forming  * Machining  * Painting  * Punching  * Shaping  * Shearing: This is also referred to as cutting  * Spinning  * Stamping Welding: Various kinds of welding are possible including MIG, TIG, Spot, Stick and Field Metal fabricators consider these to be value-added processes. Employees may perform them manually or use CNC assisted devices. These require a programmer to insure each project is handled correctly. In some shops, certain actions, including welding, are turned over...

Troubleshooting Your Farm Hydraulic Equipment...

Do you have a loader with a hydraulic steering cylinder problem? Maybe your log splitter is making funny noises. Here are some common hydraulic problems you may face in the agricultural industry, along with some possible solutions. Fluid Leaks No one wants to look under a piece of equipment and see a puddle of hydraulic oil. However, this can happen to anyone at any given time. It’s important to take care of leaks as soon as possible to avoid serious trouble. In some cases, you may only need to tighten down a fitting or two. Look to see if there is a problem with a hose. Hoses should not be stiff and brittle and if so, there may be cracks in them which are difficult to detect. When in doubt, replace old hoses when you change fluid and filter. Look to see if relief valves are the source of your leak. If fluid appears to be coming from your hydraulic steering cylinder, you may need to replace the cylinder or the seals. Funny Noises If you notice unusual sounds while operating your equipment, something may be wrong. Many strange sounds develop when air gets into the system. In fact, it can cause some cylinders to make loud knocking or banging sounds as the air becomes compressed and then decompressed. If you notice odd noises and the fluid appears foamy, you almost certainly have a problem with air in your system. Air can enter in a number of ways. Air can cause your fluid to break down quickly and lose its ability to lubricate. This can contribute to premature damage and wear to seals, causing fluid leaks. Check to see if the fluid reservoir is low. If so, you probably have a leak and air...

Certified Welding: A Solid Career Choice...

Although the rate for hiring welders has slowed down somewhat, the demand is still high in certain states and cities. Moreover, in cities such as Cleveland, the demand for skilled, certified welding personnel is still above average. In this trade, it pays to be more than an average welder. It is very important to improve your chances of wages and position by learning all you can and keeping your training up-to-date. Certified Welders and Welding For those who wish to make a career in welding, certification is necessary. The American Welding Society (AWS) is the source of certification in the United States. It defines not only who qualifies as a certified welder but also whether a shop has complete compliance with all welding-related functions. After a third party assessment, a welding fabricator shop can become certified. It must, of course, demonstrate it is capable of producing proper weldments. It accomplishes this by demonstrating its personnel, knowledge, equipment and contingent of certified welders are all involved in producing products that conform to set standards and specifications. Certifications Welding is a craft and a trade. It requires time spent in trade schools in Cleveland or elsewhere mastering the basics. In order to achieve certification from the AWS, the welder must work within an accredited testing facility. Upon demonstrating the necessary skills, at work and to a testing supervisor, the welder undergoes an official test. If the individual successfully completes the weld for the inspector, he or she may gain certification, becoming a certified welder (CW). The test requires no written examination. It demands the display at regular intervals of knowledge of certain skills to an inspector. Skilled CWs are in demand. They do, however, need to continually update and expand their learning base. Lately, technology has...

Preventive Maintenance Vs. Predictive Maintenance Through Vibration Analysis In San Antonio...

Manufacturing companies invest a great deal of money in industrial machinery, which they depend on for production. If a key component of the production system, like a conveyor belt, is compromised, the company loses money not just on the repair but on the downtime required to fix it. With careful predictive maintenance, you can minimize downtime and expensive repairs. Although the terms “preventive maintenance” and “predictive maintenance” are sometimes used interchangeably, they are actually different procedures. Preventive maintenance is done on a schedule, usually suggested by the original manufacturer of a piece of equipment. Most people are familiar with preventive maintenance for cars: the 3,000 mile oil change is an example of preventive maintenance that is done on a schedule. Similarly, many people have their air conditioning system serviced on an annual basis. The idea of preventive maintenance is to replace parts when they are at the point of wearing out, according to the manufacturer’s prediction. The problem with preventive maintenance is that sometimes parts wear out ahead of schedule, causing the machine to break down before maintenance is scheduled to occur. This can be caused by many variables in the way the machine is used. Similarly, scheduled maintenance may involve replacing parts too early. Predictive maintenance is a method of monitoring a piece of machinery to predict when failure is likely to occur. Then repair or replacement of parts can be scheduled at a convenient time. There are several methods that are often used for predictive maintenance, and one of the most common is Vibration Analysis in San Antonio. Vibration analysis is a means of detecting changes in the way a rotating part vibrates. In order to get full data on a machine’s vibration signature, it’s necessary to take readings in the vertical,...