Welder World Blog

Archive for April, 2011

Welding may seem like a generations-old tradition, but in actuality, it is an occupation that is booming. In the past couple of decades, welding has become a more popular occupation as the market has opened up. The more demand there is for welding the more people look for places with the best reputations. For welding, one of the best places to take courses is vocational schools in the state of Ohio.

Thorough Training is Important for Welding Safety and Skill

When people want to search for welder training, it is necessary to note a few things. Training should not only include courses that explain the mechanics of welding, but courses that delve into the safety of welding, as well as hands-on training. The training for welding should include information on both the technical knowledge of a variety of metals and techniques combined with the many types of welding, metals and standards of welding. Training should eventually lead to an Ohio welder Associates Degree.

A degree, such as an Ohio welder Associate’s degree, usually is referred to as Welding Technology. Although the market is growing, the outlook for those without the degree is not as enthusiastic. Salary usually pays well above minimum wage and as long as they have this revered degree, the job market will be open to them.

Welding Inspection School

For individuals more interested in welding inspectors, there is always Ohio welding inspector schools. The requirements include a high-school diploma, and from there, formal training at an Ohio welding inspector school is needed in order to become certified. Although many Ohio schools have certification for just welding, in order to be a welding inspector there needs to be Certified Associate Welding Inspector courses or CAWI courses.

There are some other things needed specifically for a welding inspector. Although vocational schools have courses and hands-on training, apprenticeships, internships and at least 4 years of experience are needed to have before going for this degree. According to the American Welding Society, classes should be taken such as welding Code Clinics and inspection seminars to prepare for the CAWI examination. From there, future associate welding inspectors need an average score of 72% to pass the exam. If the person does not pass, 40 more hours of professional training are required to take the exam again.

Welding has long been an important part of the economy of many cities across the globe. One of the most important places economically for a qualified welder and the trade they perform has been the state of Ohio in America. As one of the places where the steel industry in America was at its highest, Ohio has long had a need for experienced welders. This need has continued unabated no matter what economic times the country has been faced with. There are always new buildings in large cities such as Columbus or Cincinnati that will require repair for support struts and water works. There are also new construction projects being undergone all the time.

Welding and the Local Economy

Welding is a vital component of the economy of Ohio. As one of the backbone trades that keeps the state running, welding is a trade that is always necessary. Cities cannot be built without welders. Farm equipment in rural areas cannot be repaired without the capacity to weld. In a very real sense the entire state would cease to function as soon as the welding stops.

When a pipe bursts, or a vehicle needs body repair, a welder is there to fix it. Whenever an axle breaks, or a new hospital needs a water supply, a welder is there to make it happen. Without welding the economy of the region would plummet dramatically. The state needs both city and rural welding practices to continue to function, without it no new construction can begin. There will be no new buildings, no repairs to old ones. The cities would crumble into chaotic misshapen hulks and the food supply would slowly dwindle.

There are few truly vital non-medical trades in existence. The world would survive without computer tech support specialists, stock brokers, and gentlemen’s clubs. Large modern cities would have a much harder time surviving without welders and similar tradesmen.

Learning Welding in Ohio

If you’re interested in learning welding then the best plan is to look into Ohio welding schools and see what’s available. Ohio welder training is available in many places, but the important thing is to find a program that offers high quality training. If you can’t find a well respected welding school in your area, it would probably be worth it to get outside of your current area for your welding education. After all, you go to welding school to build you skills, and if you don’t get the proper training, what were you going to school for?

Ohio Technical College has been awarded top prize as the 2009 School of the Year in the 2nd annual Tomorrow’s Technician/Chicago Pneumatic competition. Ohio Technical College, a family-owned school providing technical training in a variety of transportation industries, was selected from more than 170 entries nominating 80 schools across the country. Babcox Publications’ Tomorrow’s Technician magazine and Chicago Pneumatic, a leading provider of high-performance tools and compressors, created the contest to recognize top technical colleges dedicated to innovative training programs that prepare students for real-world careers. As the top school, Ohio Technical College will receive 000 worth of Chicago Pneumatic tools and an award presentation at the school, among other prizes. “We are extremely honored to receive the 2009 School of the Year award on behalf of our dedicated staff and hard-working students, who have all become a part of the OTC family,” said Marc Brenner, president of Ohio Technical College. “Our team is committed to providing students with the advanced education and specialized skills – such as our alternative fuel and high performance courses that will help lead the transportation industry into the future. In addition to the School of the Year award, we’re also especially gratified to celebrate our 40th anniversary this year and showcase our continued investment in tomorrow’s professional technicians.” More than 1000 students are enrolled at Ohio …
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Many of us have experienced the frustration of running an assembly on two different wave machines and seeing two very different board qualities emerge. Why do your wave machines produce different results when both are set at the same pump speed, conveyor speed, conveyor angle, solder pot height, preheat and solder temperature, are using the exact same chemistry, have the same maintenance schedules and show the same thermal profile?

As an industry, we have often retreated to accepting that “different wave solder machines have different personalities.” Others blame operators. Yet the answer is often simple and measurable: All wave machines produce waves that are different shapes.

Limitations of Machine Set-up

What this all means is that in order to control your wave process you need to directly measure what your board actually experiences in the wave. Wave machine settings can never assure repeatability. Your board does not see a conveyor speed; it does experience a dwell time. Likewise, your board does not know your pump speed; it experiences an immersion depth. Also, your wave machine settings do not tell you the wave machine’s variability. Therefore, parameters for wave soldering must be based primarily on guidelines for board-wave interaction, not wave machine settings.

Assembly plants need no longer blame their wave solder machines, flux or personnel when their real challenge is the wave solder process itself. Your wave machine does not even purport to measure your board-wave interaction.

Good equipment does not compensate for uncontrolled process. The best wave solder equipment in the world still requires a sound approach to process optimization and control.

Dwell Time Baseline for Study

A major consumer electronics company tasked one of its North American facilities to perform a month-long study to assess the significance of dwell time optimization and repeatability. The assembly with the greatest volume, representing 19% of all the boards produced at that location, was selected for the study.

For this purpose, the Wave Solder Optimizer was used as direct board-wave contact sensors are necessary for meaningful data. Capable of performing four runs in a row, the device offered the convenience of taking multiple readings before downloading the data to a PC. Also, the Optimizer’s LCD display allowed the reading of data immediately upon its exit from the wave machine. Another important capability: Direct measurement of immersion depth. The following steps were performed:

Step 1 Parallelism was measured and established.

Step 2 Measurement of the board’s current dwell time, which was 1.0 seconds.

Step 3 Measurement of the board’s current immersion depth, which was 24 mil.

Step 4 Assessment of board quality, showing a defect rate at 312 ppm, a level considered normal at the facility despite the amount of rework being performed, and excellent by industry standards.

Step 5 Steps 1 through 3 were easily performed for three shifts in a row, twice per shift, since all data was obtained in a single run of the device through the wave machine. Step four was performed at the end of each shift.

If, prior to running the assembly, measurements showed a disparallelism, or a dwell time more than 0.1 second away from 1.0 seconds, or an immersion depth other than 24 mil, adjustments to the wave machine were made and additional measurements were taken to confirm that the desired board-wave experience was occurring. Areas unrelated to board-wave interaction were maintained throughout. These include, for example, flux types, preheat settings and solder temperature.

Soldering Machine
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How to Choose the Correct Hinge

The wide array of hinges found in a hardware or online stores can be quite overwhelming. But it can be such a simple choice if you learn a little about hinges before you go shopping for them. So, how do you know which type of hinge is the correct one to do the job?

Find out below:

First, you can narrow down the choices by some key factors. Based on the size, weight, and shape of your work materials, does the hinge need to be small and subtle or heavy and sturdy?

Another vital aspect to consider is that, while many hinges are reversible, others are built for either a right or left hand door. An example of this is the loose-pin hinge. Common for hanging doors, this pin should be removed from the top; hence, you simply cannot reverse a loose-pin hinge.

You can identify if you require a right or left hinge by standing on the outside of the door. If the door opens from you toward your right hand side, then you need right hand hinges, too. If it opens from you toward your left hand side, you need to pile up on some left hand hinges.

Moreover, consider how much of the hinge you would like to be showing when the door is closed. If the hinge is visible, should it be ornamental in nature or can it be plain and functional in design? If you like most of the hinges to be hidden, will this affect the functionality and ease of use in any way?

For your guidance, below are some of the most popular hinges and their common uses:

Butt hinge – Usually measures between 25-150 mm in size, butt hinges are the most type of hinge used for mounting doors. Butt hinges come in many different materials and finishes depending upon their application.

Ball bearing hinge – The prime advantage of this hinge is that it’s permanently lubricated, which also makes it more expensive than other hinges. Ball bearing hinges are normally used for heavy-duty door mountings, such as doors opening to a building’s exterior. Also utilized for doors that are used a lot.

Butterfly hinge – Typically used on lightweight doors, butterfly hinges are available in an array of shapes and patterns. Most butterfly hinges are easy to fit as well.

Double acting hinge – This type of hinge opens in any direction and mainly used for folding doors.

Flush hinge – Not as robust as butt hinges, flush hinges are used mostly for cabinets and lightweight doors. This is ideal if you wish to conceal the entire hinge except the barrel.

Pivot hinge – Flexible and excellent for recessed, overlay of flush doors, pivot hinge’s advantage is that it does not need a doorframe for mounting.

Spring loaded hinge – As the name signifies, spring loaded hinge has a spring-loaded system that automatically closes the door. Varieties with adjustable tension features are also available.

Table top hinge – This is utilized for drop tables to split pieces where one must drop away from the other piece.

Concealed hinge – Usually available in 25-36 mm, concealed hinges are easily adjustable once fitted and is designed for chipboard and MDF use.

Tee Hinges – These are very common hinges used for outside applications. They come in many different sizes and weights. Main uses are on gates, sheds, animal housings plus many other applications.

Continuous Hinges or Piano Hinges – The continuous hinge is utilized primarily on chest lids, cabinets or where a long hinge is required. Also known as a piano hinge, the continuous hinge is available in brass, stainless steel or normal mild steel and are available in several sizes.

Other hinges – These include: strap hinges, chest hinges, and weld on hinges plus many other. Strap hinges come in many sizes and are suggested for heavy installation conditions.

After pondering on these tips and guidelines above, you should be ready to shop for the appropriate hinge type perfectly suited to your door.

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