Uncategorized Archives - Jobsite U.S.

Quality of Jobsite Roll Forming Equipment

rollformingequipment — Fri, 30 Mar 2012 19:38:21 +0000

Jobsite is an industry leader in engineering and manufacturing roll forming equipment for the building industry. Since 1980 Jobsite has been designing and manufacturing roll formers that have earned a reputation for being reliable, durable and easy to operate.

Engineering
Jobsite’s in-house engineering department includes some of the best roll forming engineers in the world. With the combination of these innovative minds and the latest 3D modeling software, Jobsite has designed and continues to design high quality roll formers and tooling. With quality as a priority, Jobsite machines are over engineered to maximize the life of the roll forming equipment and to ensure the products being roll formed are accurate and consistent.

Manufacturing
Jobsite has been in the sheet metal manufacturing business since 1975. The success of the business is credited to the core principle of manufacturing high quality products. To ensure the quality of the roll forming equipment 90% of the parts are manufactured in-house. For example, all Jobsite roll formers include rollers that are industrial hard chrome plated. All shafts are turned, ground and polished. Also each machine is finished with a durable powder coat paint finish. This attention to detail makes Jobsite roll forming equipment durable and reliable. To prove it Jobsite offers a 2 years warranty on all manufactured parts.

Jobsite’s current line of roll forming equipment. Design and manufacturing of custom equipment is also considered.

Steel Stud and Track Machines
Downspout & Elbow Machines
Round Downspout & Elbow Machines
Elf Elbow Bending Machines
Half Round Gutter Machines (6 inch)
Industrial Box Gutter Machines (7 inch)
Snap Lock Roof Panel Machines
Roof Hat Channel & Sub Gert Machines
K Style Gutter Machine (6 inch)

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Laser Cutting Technology

rollformingequipment — Wed, 21 Mar 2012 20:56:17 +0000

Laser cutting is the latest technique or we can say the advanced manufacturing process as compared to other processes that have originated from the industrial revolutions.

It uses an adjusted focus light and an assist gas to burn typically metal into a shape which can undergo a further manufacturing process, such as countersinking or pressing.

A Tube laser cutter works on various axis bases, where this tube is revolved by a big chuck and then the laser cuts of the essential apertures, profiles and holes. Unlike those old fashioned lasers, this is the best procedure and the perfect technique of cutting metal tubes in minutes.

This laser cutting method has various advantages compared to those old “sawing” techniques:

1. Speed:
Lasers have a capability of cutting tubes hundreds of times faster than with the traditional manual methods. These lasers can cut at different meters per second, which means that one who is buying laser cut tubes could get their parts within just a few days, thereby reducing their investment.

2. Repeatability:
It often happens that while cutting a tube, there remain differences in parts as the operator uses a different technique every time. The precision laser cutting machine would only apply those settings which are already programmed in the machine, thereby minimizing deviations in the dimensions from part to part.

Repeatability is extremely essential in today’s manufacturing environment. Since, the rise in lean manufacturing techniques means that every component part has to be in uniformity with each other. Or else the major effect of a bad assembling can give rise to production delays and thereby, lost profits

3. Versatility:
The plasticity of a laser tube gives more opportunities for designers of parts specifically in the construction and architectural fields. The most complex designs can be easily cut into a tube which is not really possible by traditional laser cutter machines.

4. High Volume Manufacturing:
The advanced tube lasers have the capability of loading a six meter tube in a single setup which was extremely tough for the traditional factories. This helps in high volume manufacturing as it reduces the amount of time spent in handling the tubes.

The laser cutting machine can even cut bent or formed tubes which are absolutely not possible for old laser cutting machines. With a 3D laser cutting technique, one can easily cut the most complex formed tubes.

Laser cutters have become very important and useful in today’s competitive manufacturing marketplace. These use similar techniques as used by flat laser cutters. There are various benefits of advanced laser cutters in comparison to traditional tube cutters. The major advantage of these hi-tech laser cutters is that these actually save a person’s money in manufacturing and of course, his precious time.

One, who needs the laser cutter machine, can switch over to the Internet and search a large number of online stores that are offering these services. Keeping the requirements in mind, one can make a smarter choice by selecting the most advanced laser cutters.

Article Source: http://EzineArticles.com/?expert=Alf_Yu

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Precision Machining – EDM Principles

rollformingequipment — Tue, 31 Jan 2012 00:56:57 +0000

What is EDM machining? How does it work?

ELECTRICAL DISCHARGE MACHINING (EDM) is a metal cutting technology able cut steel with amazing precision and accuracy. This is accomplished with a system comprising two major components: a machine tool and a power supply. The machine tool holds a shaped electrode which advances into the workpiece and produces a shaped cavity. The power supply produces a high frequency series of electrical spark discharges between the electrode and the workpiece, which removes metal from the workpiece by thermal erosion or vaporization.

The basic components of an EDM system are illustrated to the right. The workpiece is mounted on the table of the machine tool and the electrode is attached to the ram of the machine. A DC servo unit or hydraulic cylinder moves the ram (and electrode) in a vertical motion and maintains proper position of the electrode in relation to the workpiece. The positioning is controlled automatically and with extreme accuracy by the servo system and power supply. During normal operation the electrode never touches the workpiece, but is separated by a small spark gap.

During operation, the ram moves the electrode toward the workpiece until the space between them is such that the voltage in the gap can ionize the dielectric fluid and allow an electrical discharge (spark) to pass from the electrode to the workpiece. These spark discharges are pulsed on and off at a high frequency cycle and can repeat 250,000 times per second. The spark discharge (arc) always travels the shortest distance across the narrowest gap to the nearest or highest point on the workpiece. The amount of material removed from the workpiece with each pulse is directly proportional to the energy it contains.

Each discharge melts or vaporizes a small area of the workpiece surface. This molten metal is then cooled in the dielectric fluid and solidifies into a small spherical particle (swarf) which is flushed away by pressure/motion of the dielectric. The impact of each pulse is confined to a very localized area, the location of which is determined by the form and position of the electrode.

Both the workpiece and electrode are submerged in a dielectric fluid which acts as an electrical insulator to help control the spark discharges. In EDM, the dielectric fluid also performs the function of a coolant medium and reduces the extremely high temperatures in the arc gap. More importantly, the dielectric fluid is pumped through the arc gap to flush away the eroded particles between the workpiece and the electrode. Proper flushing is critical to high metal removal rates and good machining conditions.

Because EDM erodes metal with electrical discharges instead of with chip machining cutting tools, the hardness of the workpiece does not determine whether or not a material can be machined by EDM. A relatively soft graphite or metallic electrode can easily machine hardened tool steels or tungsten carbide. This is one of the many attractive benefits of using the EDM process. Rather than machine a workpiece before heat treating, it can be EDMed afterward. This eliminates the risk of damage or
distortion which could scrap an expensive workpiece during heat treating.

The basic principles of wire-cut EDM are essentially the same as diesinking EDM described above. The major difference is that instead of using an electrode with a complex shape, in wire EDM the electrode is a simple wire, typically .006″ to .012″ diameter, which follows a horizontal path through the workpiece. Instead of using dielectric oil as in die-sinking EDM, wire EDM uses deionized water.

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