domenica 29 luglio 2012

Brush And Satin Finish On Stainless Steel | ArticleCube.com

While at first glance deburring & finishing stainless steel and aluminum railings may seem somewhat a niche market it should be noted that with the correct Dynabrade tools, grinding, sanding and polishing products almost any weld shop can take on this type of work.

It is hard to put a number on how many steel fabricators, Welding shops, artists garages, etc. I have been called into because a nervous owner, foreman or project manager took on railing jobs that were above their expertise. Most thought they were going to lose their shirt once they got to the metal finishing stages on somewhat temperamental stainless or aluminum.

The best advice I can give anyone who wants to Brush Finish Stainless Steel or Aluminum Railings in a professional manner is set up your shop and your polisher with the necessary Dynabrade tools and Abrasives. If you are willing to allocate some of your time and hard earned money as an investment in yourself and your company the quality stainless or aluminum railings you produce will come back to you financially many times over. The most common abrasives questions I get asked for these metal finishes are some of the easiest to answer. That’s not to say I haven’t seen some interesting challenges over the years. I have been in over 1,000 shops that work on all types of metals and woods.

A consistent finish on stainless or aluminum railings steel fabricators want to achieve is a brush, satin or #3 finish or #4 finish. Most steel fabricators order the stainless steel or aluminum pre-finished to this specification and only need to bring the areas they have welded back to a nice clean satin finish which will match the rest of the metal railings original finish.

I like to see anyone who is serious about working with metals such as stainless or aluminum own at least two Dynabrade tools for their shop. The first is a Dynabrade Dynafile. There are many variations of the Dynafile which Dynabrade Manufactures. They are as follows: The Original Dynafile model 14000, the dynafile II model 40320, and the Electric Dynafile model 40590. Either one of these Dynafiles will do the job.

I prefer the Dynafile II series air or electric. They seem to be the most versatile. You can position the rotating sanding belt head in many different positions depending on the angle of your work piece. The Electric dynafile II and the Air Dynafile II also accept over 20 interchangeable contact arms which will hold sanding belts and surface conditioning belts 1/8” to ?” in width.

The Dynafile’s primary function is to grind and polish hard to reach areas on a metal work piece. Some examples of this are the corners or where the welds join together two or more parts. The second Dynabrade Tool I find to be a necessity from Dynabrade is from the Dynastraight Family. These tools include: The Dynastraight model 13204 .7 hp 3,400 RPM or the Dynastraight model 13505 1 hp 3,400 RPM.

I like these models because they are rated at the proper RPM and have male 5/8-11 threaded wheel arbors which are standard and allow for many different abrasives to be mounted and used on them. If you want to use a dynabrade inflatable rubber drum with sanding belts or surface conditioning belts on it the Dynabrade Pneumatic Wheel part number is 94472. I also recommend a combination of unmounted 6x1x5/8 flap wheels in assorted grits for either Dynastraight to help bring the Railings back up to the 3 finish or 4 finish.

venerdì 27 luglio 2012

Robotic Welding Machines | ArticleCube.com

The automotive manufacturing industry has embraced automated Welding within a big way a long time. The abilities of robotic welding has caused the number of units to grow to help more 120, 000 units as of 2005. Early growth inside numbers of robotic units was limited by the high equipment costs and somewhat limited use of automated welding to help high production scenarios. Just before 2009 the growth in may be automated welding units had attained 20% of the total of all industrial robot applications. The robotic welding unit that is a member of this population is made up of the manipulator and the controller, which tells the manipulator where to start. The welding unit can be based on a SCARA robot or it can be Cartesian. The design of the complete unit is usually based on the way that the welding work station is going to be integrated with other succeed stations.

Automated welding is a great improvement over the results that are attained by manual welding. The quality and regularity of automation far out paces what can be done by hand. The two main characteristics that define the quality of a weld are weld integrity along with the repeatability of a weld. With the automated welding work station the integrity of the weld is produced through the electronic weld process controllers. Repeatability of high quality welds is a result of the combination of trained torch and part movements and the recall of welding parameters from the controllers. These two factors just can't be consistently repeated in a manual welding process. As long as the welding work stop can present the parts to become welded consistently in the range of tolerance that's needed is by the manufacturing course of action, the welds should always be the same quality. Human errors and inconsistencies are eliminated through the placement of parts by a robotic device. Manual welding often will yield a particular percentage of scrap, requiring rework or loss of materials. The human work in the welding operations is always impacted by fatigue and other inconsistencies that contribute to the need for closer quality control. The advent of automated welding in manufacturing cuts the costs of scrap and associated with close scrutiny by quality control. Automated welding raises the throughput of the welding operate station. Having a robot do the welding enhances the safety in the seed, while the cost of getting the job done is reduced significantly. After installing a welding work station a company can get a fast return on its investment.

There are two different types of welding work stations that could be added to the manufacturing line, semiautomatic and instant. The semiautomatic work station contains a human tender whose responsibility is always to load the part that is to be welded into the light fixture. The critical movement in the torch, consistent stillness in the part, and retrieval of weld parameters are performed by way of the controller. When the weld is usually completed the tender purges the completed part to start the process again. With the automatic welder performs all the tasks without the need of a tender. Both semiautomatic and automatic welding succeed stations have cycle times that are not dependent on any sort of human intervention, so the production line will run at a consistent speed.

Welding On Wire Feed | ArticleCube.com - Free Articles - Article ...

Mig Welding is just another name for Wire feeder welding. The fundamental idea behind wire feed welding is that you use a welding wire that constantly feeds through a MIG welding gun when you grip the trigger.

This is a nonstop welding process. You keep your finger on the trigger and the base metal, welding wire touching you can do wire feed weld all day. There are many different types of welding wire. You can use for many different welding applications.

Welding wire is the most commonly used for more than likely an AWS ER70S-6 classification wire. This welding wire is used fabrication shops and all welding for many different types of welds.

A cover wound wind of wire will be evenly wound onto the spool from left to right with each and every layer of wire in order to sitting next to the other. This type of process a lot better for wire feedability as there will be no bends and little kinks in the wire feed.

Random wound will be exactly random wound wire in any old type of fashioned.Because the wire is wound on the spool with each and every layer in a random fashion, the wire will cross over itself a a small amount of times. The spool starts to fill up with the wire feed, each and every time there is a intersect of the wires it can make a little bend in the wire.

These little bends in the wire can damage your wire feedability which in turn will affect your overall weld quality and feed.

When you are using a MIG welding machine or a wire feed welding machine you have welding consumables that need replacing on a regular basis. Every MIG welding machine gun will have a shroud and contact tip or a nozzle. And then depending on which type of brand welding torch you have there will also be a gas diffuser or some kind of insulator.

I guess that most home welders or DIY will use what is meant by gasless welding wire. This process is also known as a flux cored wire. Be careful though because there are two different types of flux cored welding wires. There are a lot more than two, but for general home welding wire feed make sure that you get a gasless MIG welding wire feed that is an E71T-GS.

Now if you want to do decide to use a gasless MIG welding wire you are going to have to modify the wire feed rolls. The reason for this mig welding wire is because it is a flux cored wire the wire is not solid all that way through. The flux is on the in the interior of the wire the wire is very soft.

So if the wire diameter is for dispute sake 0.9 mm you need to use a 1.0 mm get in touch with tip. This will really help with the smooth feeding of the wire and allow better welding.

Finally you're going to have to use a a little larger get in touch with tip for when you use a flux cored wire.