The technology of fabricating metal has existed for thousands of years. Welding, in particular, can be traced back to the Bronze Age. When ancient people discovered metal ore, along with the process of applying heat to extract the metal from the ore, metal fabrication tools became much more sophisticated.

Even today tools are becoming more and more complex with new advances in steel manufacturing and metallurgy. Increasing demand for quality metal products prompted the development of more precise processes of fabricating and designing metal. Welders and steel workers these days utilize a wide variety of fabricating tools and machinery to design metal into various forms and components.

Metal fabricating techniques vary depending on the desired output. Different qualities of metals require specific applications in order to successfully reshape them into something practical and useful. Here are a few metal fabricating techniques and their advantages:

Roll Forming

In forming sheet metal, specific techniques are needed. One of them is roll forming. In this process, the sheet metal undergoes continuous bending until the preferred cross-section profile is achieved. A roll forming machine has the ability to roll metals and gradually bend them. Each roll forming stand is designed to bend a small section of the metal.

One advantage of the roll forming process is that it adds strength and rigidity to the metals. Unlike other fabricating methods such as stamping and folding, roll forming can create shapes of identical cross section, allowing you to achieve uniformity consistency of metal profile and superior surface finish. Roll forming is also an energy efficient technique that doesn’t usually need additional process heat.

Metal Spinning

For some metal fabricating processes, metal components benefit from being spun on lathe tools or machinery, either to assist with structural formation or metal finishing. It can be done by hand or by a CNC lathe. Metal spinning, also called spin forming or spinning, involves the use of disc or tube of metal which is rotated at significant speed to reshape them into various forms.

Metal spinning is much more cost-effective than other fabricating techniques that require bulky tools and machine parts. Basically, you only need a simple hand metal spinning tool known as “spoon” to get the job done. Spinning tools can be also made of hardened steel for using with malleable metals such as aluminum or brass for spinning stainless steel.

Hydro-forming

In shaping aluminum or brass, hydro-forming can be implemented. This process makes use of fluid pressure in place of the punch in a traditional tool set to design the part into the desired form of the die. Hydro-forming is particularly useful for making whole components that would otherwise be created from multiple stampings joined together. Another advantage of this fabricating technique is that it creates seamless parts through the pressure it puts on metal components.

Metal Fabricating Techniques And Their Advantages is a post from: CNC Information | CNC Videos

Below are some of the most common methods to fabricate and cut sheet metal:

Laser Cutting

One of the latest methods of cutting sheet metal is laser cutting. In this operation, a specialized computer numerical control (CNC) laser is used to heat and burn the sheet metal, allowing a beam of laser light to pass through its surface. By permitting oxygen through the same nozzle from which the beam goes out, the sheet metal can be cut in a fast, smooth and precise manner.

Punching

Punching is another way of cutting sheet metal. This is carried out by moving the sheet of metal between the top and bottom tools of a punch machine. As compared to laser cutting, punching is less flexible in terms of cutting complicated shapes, but relatively faster in repetitive outlines. The grille of an air conditioning unit, for example, is usually made through punching.

Cutting Sheet Metal With Tin Snips

Sheet metal can also be fabricated and bent without using any machines. In fact, conventional hand tools such as a knife or axe along with a hammer will do the job. For hobbyists, cutting sheet metal with tin snips is a popular method, but a very tricky one. Sheet metal edges are sharp and the cutoffs are stiff, making it difficult to negotiate the curve. These dilemmas are common for those who don’t work with sheet metal on a regular basis. To successfully cut sheet metal using this traditional method, one must use the proper tools and know the necessary techniques.

You can choose from a wide array of tin snips in the market today, and selecting the right one can be a challenge. If you’re just a beginner, most experts recommend an offset compound tin snips. The cutters must be offset under the handle so you can maintain your cutting hand above the work. Because of the compound action, you’ll exert less time and effort even in cutting thicker material. Take note, however, that compound snips are color-coded and are not created similarly. A green snips, for instance, is created to cut clockwise curves. A red snips is for cutting counter-clockwise curves.

Cutting Sheet Metal With Aviation Snips

Aviation snips can also be used in cutting sheet metal. Such tools are very popular among sheet metal workers and people who work in construction projects. Using aviation snips is difficult and, to a certain extent, painful, because the worker is obliged to place his wrist in an awkward position in order to grasp the section to be cut. Aviation snips with the cutting edges offset from the handle, also known as upright snips, may help minimize this awkward posture.

Different Ways of Cutting Sheet Metal is a post from: CNC Information | CNC Videos

2550 CNC Router Engraving & Cutting Metal Tags is a post from: CNC Information | CNC Videos

Intelligent LED lighting to achieve a better transmission of data – Sheet Metal Fabrication is a post from: CNC Information | CNC Videos

Originally posted 2010-02-08 16:22:53. Republished by Blog Post Promoter

Where to buy a metal lathe or CNC lathe? is a post from: CNC Information | CNC Videos

They use a range of machine and hand tools to help shape and cut the metal and in order stamp or drill necessary holes. They may also need to hammer down the excess surface weld metal. Many sheet metal workers often specialize in a variety of complex techniques or have the knowhow to operate more than just one of the machines. Learning and understand the safety precautions will keep sheet metal production staff safe while working around the dangerous machines.

1) Personal qualities and skills

All workers should be able to arrive to work knowing they are safe while being in a hazardous environment. Strong work skills and being organized should be at the top of all employees list. They should have the ability to learn and follow all engineering drawings. It’s imperative that sheet metal workers obtain excellent observational skills in order to spot dents or flaws. Paying close attention to detail is very important when utilizing, marking out and when measuring equipment. Being good with numbers is a must for doing measurements and using calculations to determine the correct shape sizes. A skilled employee can keep himself and other employees safe by having this type of knowhow.

2) Take Protection

Make sure that you are wearing gloves with metal as obviously there will be sharp corners involved when you are working with metal. Many machinists have decided to not bother wearing gloves and have ended up with missing fingers or worse. It’s always recommended that all new machinists wear work gloves even if they are handling the metal and not just when working on the CNC machine.

In addition, workers should always use safety goggles at all times. Eye protection if working around an active machine is imperative. Even though the CNC machines contain a plastic guard a lot of tiny pieces of metal or other debris could fly into your eye without notice. When using compressed air for cleaning machines you should take extra precautions as your eyes could easily be damaged from flying debris as there is normally small slivers that are small enough to fly into your eye.

3) Starting up your machines

One thing that new machinists often neglect to think about is making sure that their machines are properly warmed up before they start working on them. I would recommend allowing your machine to warm up for around 10 minutes before you begin working on it. The warm up for a machine can be set to a moderate speed so not to cause any problems before you start applying pressure to them, very much in the same way that you would not apply too much pressure to a cars accelerator before it is warmed up.

Slowly starting the machine process in the beginning of your shift is the best way to warm up the machine. If you decide to use the machine without a warm up, then it may be possible if you just start your first job of on a slow cycle to make sure things are running smoothly.

4) Cleaning you machine.

It is advisable to be able to clean your machine and also to make sure that the chips and other debris are cleaned away after every cycle. The small chips can get caught up on the various spindles of a machine and cause great problems when they are not removed. You also need to make sure that the chips are removed from the chuck jaws and also the vices.

If at all possible, sheet metal workers should plan and position their workstations and materials so that heavy items can be lifted from waist high in a standing position. Feet should be placed shoulder width apart, directly under the hips.

The body can also be positioned to take advantage pivoting movements that can reduce the chance of falls or improper body alignment during transfers of heavy objects. These lifting techniques can reduce muscle strain and prevent neck and back injuries in sheet metal workers.

Sheet metal working: Some Safety Tips for Sheet metal workers is a post from: CNC Information | CNC Videos

There are various factors like rate of production, desired geometry, and other physical requirements that influence the fabrication process. The benefits of the metal fabrication process are far and wide because it is used by all industries. Every precision sheet metal fabrication  process undergoes three primary processes that include forming, cutting and finishing. Forming is a process that alters the form of the flat metal sheet. Forming can be done using various different processes like annealing, bending, cold rolling, drawing, forging, mechanical working, press forming, roll forming and welding. After forming, a metal sheet is cut to alter the shape by removing some unwanted material. The cutting process includes stamping, shearing, sawing, drilling, blanking and punching. Finally, the last stage is the finishing process. In this process, the shaped metal sheet is given a finished and soft surface using sanding and vibration techniques. Aesthetic considerations like painting and visual design applications are also few of the method applied to give the finishing touch. Some of the latest techniques in metal fabrication involve laser cutting, electro discharge machining, water jet cutting and wire cut EDM. In some cases CNC machining is also used.

There are various products that are created during precision sheet metal fabrication. The most common objects produced are metal cabinets, enclosures, ventilation shafts, hoods, exhaust systems, tanks and prototypes. Metal fabrication is also used by various other industries for food dispensing, food storage, communications, automotive, computer, medical, electronics, aerospace, telecommunication, pharmaceutical, residential and construction.

Some of the types of Precision Sheet Metal Fabrication include processes like Annealing (heating), Bending (straining), Cold forming, Cold rolling (shaping sheet metal using rollers), Drawing (material is forced into a die with a punch to form a cup-like shape), Forging hammering or pressing), Rolling (reducing thickness of the material), Extrusion (producing cylindrical bars or hollow tubes by forcing round billets through one or more dies) and Spinning (forms axially symmetrical shapes).

Precision Sheet Metal Fabrication is a post from: CNC Information | CNC Videos

Fundamental Facts of a Metal Working Machine is a post from: CNC Information | CNC Videos

The Sub-sectors – American metal working field is consisting of 2 sub-sectors, which are the industrial tooling sector and the machine tooling sector. Sectors for industrial tooling include approximately 7,000 organizations which initially manufacture tooling, dies along with industrial molds. While the sectors for machine tooling comprises more or less 550 companies which commonly produces the machinery. Lots of the companies were smaller and can do the customized parts.

NC or the Numerical Control – this numerically controlled equipments are composed of electronic controller along with the machine tools that runs to mostly metalworking machines. These days, NC machines are developed into the computer numerical control or CNC, in which the computer will act as controllers. These controllers are guiding the machine parts to different positions that are detailed to the instructions like drilling holes moving drill bits to the metal pieces.

CNC tools were usually used for the computer running systems in manufacturing. Though it is a type of automatic machining, CNC machine apparatus have to run correctly to achieve the best possible benefit.

Operators – trained operators are cautiously watching the equipment or the CNC machine to avoid the incidence that can cause damage tools or any other parts. Operator’s responsibilities were based to the position also with the type of equipment used. The certain CNC tools automatically look over to make adjustment to the operations of the machine.

Lathes – this type of machine cuts, shape and drill the metals. It spins some block of materials around the selected axis of revolution to complete the job required. Lathes make the items such as crankshafts and candlestick holders.

Fabrication – it is defined as construction of the machines and any other equipments that involves shaping, cutting and bringing together the components that were produced by raw materials. Fabrication and machine shops are sometimes overlapping with their tasks. Fabrication shops are usually focused to the metal preparation, assembly and welding, while machine shops are more concentrated to the metal working machining.

Great Info on Metal Working Machines is a post from: CNC Information | CNC Videos

It is thought that some of the first practitioners of metal fabrication where the ancient Egyptians who used metal working for the creation of gold jewelry. While gold is found in nature and requires little work to form and mold, eventually it was discovered that ore and heat could be used to accomplish more.  With that knowledge, even today archaeologists find remnants of ancient mines all over the world.

Since its very humble beginnings, metalworking and metal fabrication began to grow in complexity and scope.  Civilizations continued to innovate and discover new methods and materials to create the metal products and metal fabrications that they needed.  All of that innovation has lead to the present day, where metal fabricating continues to be innovated, and the scale and complexity are centuries ahead of where they began.

But what does Metal Fabricating Involve Today?

Think of all the things surrounding you. Everything that contains metal could have once been a simple piece of ore, a product of the earth heated, bent, cut, and formed to create a product that we can use. With the same general principles used thousands of years ago, metal fabricators today take the raw material and transform it into the products and tools that we need.

Those ancient efforts to join things together have led to…

Aluminum Fabrication
Contract Assembly
Large and Heavy Machining
Large Metal Fabrication
Machine Frames
Metal Bending
Metal Forming
Plasma Cutting
Stainless Steel Fabrication
Welding

Today, metal fabricating processes like plasma cutting stand apart as an aspect of the craft that would have been inconceivable to the earliest metal fabricators.  In the same way, the sheer size and volume of metal fabrications produced in contract manufacturing would boggle the mind of anyone but modern man.

Using state of the art technology such as computednumerically controlled (CNC) machining tools, computer aided design (CAD), and specialty metals like hot rolled steel, aluminum, and stainless steel, modern metal fabricators are producing larger  and more intricate fabrications every year.

Combine all of that modern technology with quality control and the complexity of modern metal fabrications and you get something the metal fabricators of the past never would have expected – absolute perfection.

From the smallest metal components for electronics to large metal fabrications like aircraft components and building frames – you can be sure that metal fabrication and contract assembly have come a long way.  From before even the earliest recorded history, with simple gold jewelry and slowly fabricated machines and weapons to the present day, with more complexity than they ever could have imagined. metal fabrication continues to move and produce  like never before.

Metal Fabricating: Providing What We’ve Needed Since Before Recorded Time is a post from: CNC Information | CNC Videos

cnc plasma cutter for metal cutting www.itopchina.com is a post from: CNC Information | CNC Videos

Punching of sheet metals is a steel fabrication process utilizing ‘tools and dies’. A punch press is the machine which performs the work of shaping and cutting. A turret houses a set of various tools on the machine, depending on the type of punching required.

The punch press, a type of fabricating machine, presses sheet metal against a die with extreme pressure and at very rapid speed of positioning. Sheet metal, now pushed into the die, assumes the shape and design of the specific dye. Cut away, is any excess metal from the newly shaped piece of sheet metal.

Punch presses use hydraulic, pneumatic, or electrical power in their operation. This power exerts immense pressure to press the shape into and perform the cutting of the metal. A piece of sheet metal receives its new form from the taking away of material. Less sheet metal makes a new form. The excess taken away becomes scrap metal for other uses.

A CNC operated punch press typically performs this manipulation process. CNC stands for computer numerical controlled. In the case of a punch press, it utilizes a computer in its operations. The computer directs the action of this press, which contains the tools and their respective dies.

This machine receives different punching instructions from a program written and installed in the computer for a particular application. This enables the machine to go through a complete machining cycle, using various tools and automatically positioning the sheet metal over the appropriate die, at very rapid speeds and with little operator intervention. The accuracy of this process is measured in thousandths of an inch.

A manually operated punch press, for simple punching, with one tool and die set, are still in use today. Large operations with multiple dies and unique specifications rely on the CNC application.

The die portion of a punch press is of very fine tolerances. These are tolerances of thousands of an inch. Pressing sheet metal into a die with a punch means the die does the actual cutting of the metal. The punch, attached to a ram, is a removable piece, as is the die portion.

The die set for sheet metal punching consists of a male punch and a female die. When brought together, with the application of intense pressure, the result is a sheet metal piece as per the specified design.

Punch presses using CNC technology have meant greater volumes of sheet metal production. This process spells efficiency for a company, which means greater profits. This edge is necessary in the competitive steel fabrication companies worldwide find themselves.

Today, there are turret punch presses, CNC types, which perform faster because of technological advances. They can operate unattended and have sheet metal sorting capabilities. New technology constantly raises the mark for performance. Wise steel fabrication companies invest in these applications if it means streamlining of their operations for maximum profit.

Today’s CNC controlled machines can even alert workers who are off-site if something goes wrong in a sheet metal punching process. This allows for unattended “lights out” production capabilities for manufacturers. Telecommunications technology embedded in these computer systems links to users’ phone devices. In essence, CNC technology provides a constant watch over machining of steel.

The use of robotic applications in steel fabrication, including punching, receives continued research and application. Advanced, state-of-the-art CNC technology is the solid future of most fabrication industries.

Computer Numerical Controlled Machines Automate the Sheet Metal Fabrication Industry is a post from: CNC Information | CNC Videos

Metal Manufacturing dying in the US? is a post from: CNC Information | CNC Videos

CNC Plasma Cutter_ EastCoast CAD/CAM Metal and Acoustic Liner is a post from: CNC Information | CNC Videos

cnc plasma metal art is a post from: CNC Information | CNC Videos

Samples of Metal Cut on CNC Plasma Table is a post from: CNC Information | CNC Videos