Plasma cutting is a process that is used to cut steel and other metals of different thicknesses (or sometimes other materials) using a plasma torch. In this process, an inert gas (in some units, compressed air) is blown at high speed out of a nozzle; at the same time an electrical arc is formed through that gas from the nozzle to the surface being cut, turning some of that gas to plasma. The plasma is sufficiently hot to melt the metal being cut and moves sufficiently fast to blow molten metal away from the cut. Plasma can also be used for plasma arc welding and other applications.

Plasma Cutting Machine use a number of methods to start the pilot arc, depending on the environment the unit is to be used in and its age. Older cutters use a high voltage, high frequency circuit to start the arc. This method has a number of disadvantages, including risk of electrocution, difficulty of repair, spark gap maintenance, and the large amount of radio frequency emissions. Plasma Cutting Machine working near sensitive electronics, such as CNC hardware or computers, use the contact start method. The nozzle and electrode are in contact. The nozzle is the cathode, and the electrode is the anode. When the plasma gas begins to flow, the nozzle is blown forward. A third, less common method is capacitive discharge into the primary circuit via a silicon controlled rectifier.

Plasma gouging is a related process, typically performed on the same equipment as plasma cutting. Instead of cutting the material, plasma gouging uses a different torch configuration (torch nozzles and gas diffusers are usually different), and a longer torch-to-workpiece distance, to blow away metal. Plasma gouging can be used in a variety of applications, including removing a weld for rework. The additional sparks generated by the process requires the operator to wear a leather shield protecting their hand and forearm. Torch leads also can be protected by a leather sheath or heavy insulation.

In the past decade plasma torch manufacturers have engineered new models with a smaller nozzle and a thinner plasma arc. This allows near-laser quality on plasma cut edges. Several manufacturers have combined precision CNC control with these torches to allow fabricators to produce parts that require little or no finishing.

from:wiki

Diameter range	80 – 1600mm
Thickness of strip	0.4 -1.3mm Glvanized steel
	0.8mm Sinless steel
	0.4-1.2mm Auminum
Strip Width	standard 137mm up to 1mm thickness, 140mm above. Other widths on request.
Lockseam	Outside tube, on the inside on request.
Production speed	Max. 60 meters/min. depending on material
Cutting system	The pqtented flying slitter
Net weight	2900kg
Gross weight	3200kg
Machine dimension	3000mm*1950mm*1700mm,
Package dimension	3050mm*2000mm*1800mm
Options	Automatic length control system, controlled corrugation unit.METU flange slitter Saw blade cutter

 

from:sbkj

 Line ? consists of a feeding metal frame, leveler grooving roller, hydraulic notch and punch Square Duct machine, hydraulic shearer and folder. The electrical control system uses a computer with a closed-loop servo-system to increase the precision and reliability of the line. The maximum working speed is 10m/min. The length tolerance is ±0.5mm.The diagonal line tolerance is ±0.8mm. The capacity of the manufacturing process will produce 1000m2 of Square Duct.
 
    
1. Four power metal feeding frame
2. One leveler grooving roller machine
3. Four hydraulic notch and die
4. Hydraulic shearer and folding machine,Fold
5. Industrial computer and specific software
main component
instruction
1.    Fixed size cut metal that can be used with a plasma cutting machine together
2.    a.punch "C","S" insert cleat notch, which can be used with "C" cleat and “S”insert flange machine
       b.Different connecting methods can be used with TDF flange machine and TDF connecting machine.
       c.It is able to punch all kinds of notch in angle steel flanges and "Z" shape It flanges.can also form "","" and ""shape, and be used with machine to produce a complete set of ducts.
3.    Able to punch TDC notch and press to form insert flange to produce "" shape duct; able to be used with connecting machine and insert flange to give a complete set of ducts. can be used with plasma system.can use with plasm?

From:sbkj

TDC unit is one of the two universal flange making systems in the world. It can save time and material drastically with its wel-seal, strong and durable joint structure. So it is specially suitable for producing a duct with a large sectional area. Today many famous buildings in the world utilize this kind of structure in the ventilation system such as the American Kennedy Space Center, Guangzhou CITIC Plaza etc. The unit consists of a feeding frame, main tube forming machine and a shearing unit, which includes grinder and hydraulic shearing unit. The hydraulic shearing unit makes fixed cutting available with very little burr, and may be operated automatically with a maximum work speed of 6 m/min. It is divided into four types: T-20?T-30?T-35?T-40 with their corresponding duct corner T-20DC?T-30DC and T-40DC.TDC made by SBKJ may match and produce all the ducts in the DW144 standard, and has passed the HVAC PW/TMI(1987) pressure test, which is a speciality test for the intensity and sealed condition of a duct.

 

 

 

From: SBKJ

If your CNC plasma cutting machine  leave a little to be desired since they may be aging, and no longer keep up with the demands of constant change, you may be able to save them without investing in brand new machines.

Plasma Technologies has announced their answer to aging HVAC shop technology with their new low cost yet high value retrofit kit for Lockformer and Cybermation plasma cutting machines, which replaces all the old electronics with brand spanking new motors and controls.

 

In an effort to outfit the Robot Shop  with the things that can liberate an inventors imagination, they have purchased a Hypertherm 30 plasma cutting machine and made it available for use by the members of the Robot Club in the Robot Shop.  Imagine what it would be like if you could sketch your design on a sheet of steel with a cutting torch as easy to use as a marking pen.   You can do that here at the AIM / Robot Club workshop.  Team members can cut steel 1/4" thick as easy as running a hot knife through butter.  Much like a scroll saw is for pattern cutting in wood, the plasma torch allows free form pattern cutting in steel.  Since there is a 1/2" stand off from the plasma jet, wood patterns can be used and the design traced with the plasma jet in steel. You can cut any direction, any angle.  The cut edge is clean and sharp. 

 

Plasma cutters feature new technology has a very fruitful and useful for cutting metals.

 

 If your campany need buy plasma cutting machine,you must see its main technical date.

For below example: Plasma Cutting Machine   SBPC-3100

Main Technical Date:

Type	Cutting table(mm)	Capacity(mm)	Weight(kg)	Diminsion(mm)
SBPC-3100	1250×3100	0.4-4	2200	4500×3000×2000

The following factors should be revised just before making a purchase of a plasma cutting machine . Establish the thickness This is a vital factor. Plasma cutters are valued according to their amperage and cutting ability. To cut thick materials go in for a cutter that has lover amperage. Decide on Cutting Speed If the purchase is for commercial usage then go in for a cutter that provides higher amperage. Although this does not matter much, it is always best to buy the one is specially made for the purpose. If the plasma cutter is bought for rare usage and need not essentially be fast at its work then go in for the ones that offer lower amperage. Alternative to High Frequency Starting Many cutters contain a pilot arc. The high frequency that it utilizes may affect office equipments and computers.

Consumable Cost vs. Consumable Life Torches in cutters are available in a wide variety. Check for a manufacturer who provides with the fewest number. This will result in cost effectiveness. Also check out the length of life of the consumables. Scrutinize the Quality Make examination cuts on a number of equipments, moving at the equal rate of pace on the similar depth of substance to observe which equipment offers the most excellent value. As you contrast cuts, inspect the shield for dross on the base and notice if the kerf angle is at right angles or angular. Look for a plasma cutting machine that offers a tense, alert arc. An additional check to execute is to elevate the plasma torch up from the plate while cutting. Observe how far you can progress the torch away from the work section and still uphold an arc.

A longer arc results more volts and the capability to cut all the way through thicker plate. Pilot to Cut and vice versa Look for an instrument that offers a rapid, optimistic shift from pilot to cutting at a huge shift height. These equipments will be more tolerant to the machinist and will in good health sustain gouging. In these instances, the apparatus will be obligatory to swiftly shift from pilot to cut and back to pilot extremely fast. To acquire something like this, they may advocate you cut stretched out metal using only the pilot current. Working Visibility As you are operating on an appliance, you would like to observe what you are cutting, more than ever when tracing a prototype. So make sure that this is not hampered with by your plasma cutting machine. Portability A lot of regulars use their plasma cutter for an assortment of applications and call for to shift the machine in the region of a plant, job location or even from location to location. A portable cutter is the most need at these times. Austerity Go in for a piece of equipment that is durable and has confined controls. Comfort ability and ease Go in for a cutter that has easy-to-read control panel

In electronics, a vacuum tube, electron tube (in North America), thermionic valve, or valve (elsewhere, especially in Britain) is a device used to amplify, switch, otherwise modify, or create an electrical signal by controlling the movement of electrons in a low-pressure space. Some special function vacuum tubes are filled with low-pressure gas: these are so-called soft tubes as distinct from the hard vacuum type which have the internal gas pressure reduced as far as possible. Almost all tubes depend on the thermionic emission of electrons.

 A Spiral Tubeformer consists of electrodes in a vacuum in an insulating heat-resistant envelope which is usually tubular. Many tubes have glass envelopes, though some types such as power tubes may have ceramic or metal envelopes. The electrodes are attached to leads which pass through the envelope via an airtight seal. On most tubes, the leads are designed to plug into a tube socket for easy replacement.

The simplest vacuum tubes resemble incandescent light bulbs in that they have a filament sealed in a glass envelope which has been evacuated of all air. When hot, the filament releases electrons into the vacuum: a process called thermionic emission. The resulting negatively charged cloud of electrons is called a space charge. These electrons will be drawn to a metal plate inside the envelope, if the plate (also called the anode) is positively charged relative to the filament (or cathode). The result is a flow of electrons from filament to plate. This cannot work in the reverse direction because the plate is not heated and does not emit electrons. This very simple example described can thus be seen to operate as a diode: a device that conducts current only in one direction. The Spiral Tubeformer diode conducts conventional current from plate (anode) to the filament (cathode); this is the opposite direction to the flow of electrons (called electron current).

Vacuum tubes require a large temperature difference between the hot cathode and the cold anode. Because of this, vacuum tubes are inherently power-inefficient; enclosing the tube within a heat-retaining envelope of insulation would allow the entire tube to reach the same temperature, resulting in electron emission from the anode that would counter the normal one-way current. Because the Spiral Tubeformerrequires a vacuum to operate, convection cooling of the anode is typically not possible. Instead anode cooling occurs primarily through black-body radiation and conduction of heat to the outer glass envelope via the anode mounting frame. Cold cathode tubes do not rely on thermionic emission at the cathode and usually have some form of gas discharge as the operating principle; such tubes are used for lighting (neon lamps) or as voltage regulators.

The Spiral Tubeformer is a voltage-controlled device, with the relationship between the input and output circuits determined by a transconductance function. The voltage between the control grid and the cathode controls the amount of current in the tube that goes from cathode to anode. Control grid current is practically negligible in most circuits. The solid-state device most closely analogous to the vacuum tube is the JFET, although the vacuum tube typically operates at far higher voltage (and power) levels than the JFET.

Dual working station

Maximum flexibility-eliminates equipment’s changing over and reduces tool’s changing

Higher production speed

Higher capacity

Improved seam’s quality

Electrical	380V/3PH/50Hz
Total power	5KW
Hydraulic oil	55 L
Consumption of compressed air	75L/hour 6har
Max. forming speed	120m/min
Diameter range	?125-?1250mm
Net weight	750kg
Material	??(Thickness ) mm
Black steel Galvanized steel Stainless steel Aluminum	0.4-1.5 0.4-1.5 0.4-1.0 0.4-1.5
Production time	1Pc ?200mm 90? Elbow 1.5min
Weight	750kg
Packaging Size	1400*800*900

There is a photo of Elbow Making Machine:


Reference from: SBKJ spiral elbow machine

Plasma cutting is a process that is used to cut steel and other metals of different thicknesses (or sometimes other materials) using a plasma torch. In this process, an inert gas (in some units, compressed air) is blown at high speed out of a nozzle; at the same time an electrical arc is formed through that gas from the nozzle to the surface being cut, turning some of that gas to plasma. The plasma is sufficiently hot to melt the metal being cut and moves sufficiently fast to blow molten metal away from the cut. Plasma can also be used for plasma arc welding and other applications.

Plasma cutter has also been used in CNC (computer numerically controlled) machinery. Manufacturers build CNC cutting tables, some with the cutter built in to the table. The idea behind CNC tables is to allow a computer to control the torch head making clean sharp cuts. Modern CNC plasma equipment is capable of multi-axis cutting of thick material, allowing opportunities for complex welding seams on CNC welding equipment that is not possible otherwise. For thinner material cutting, plasma cutting is being progressively replaced by laser cutting, due mainly to the laser cutter's superior hole-cutting abilities.

A specialized use of CNC Plasma cutters has been in the HVAC industry. Software will process information on ductwork and create flat patterns to be cut on the cutting table by the plasma torch. This technology has enormously increased productivity within the industry since its introduction in the early 1980s.

In recent years there has been even more development in the area of CNC Plasma Cutting Machinery. Traditionally the machines' cutting tables was horizontal but now due to further research and development Vertical CNC Plasma Cutting Machine are available. This advancement provides a machine with a small footprint, increased flexibility, optimum safety, faster operation, energy efficiency, ergonomic and more environmentally friendly.

And We, Jiangyin Sanben Technology Co., Ltd. ,supply Plasma Cutting Machine, there's a photo of plasma cutting machine of Sanben Techonology:

Reprinted from:Wiki,Sbkj's Plasma Cutting Machine

January to April this year, China's machine tool imports dropped them on a quarter of all imports 11,12 compared with last year the month of decline has narrowed, but began to decline in April, the month in April fell by more than half of imports. Month in April, 4383 China's imports of machine tool units, dropped 51.9 percent year-on-year, worth 540 million U.S. dollars, down 20.1%.

Metal processing machine tools(such as duct machine,pipe machinery, elbow machine,tube machine and cnc plasma ) this year, China's imports is mainly due to sharp decline in domestic demand is insufficient. The world economic recession on the negative impact on China's economic development become increasingly prominent, especially in the global automotive industry such as steel and machine tool industry fell significantly downstream, resulting in the domestic market demand for machine tools dropped.

The short term, machine tool products will continue to lack of domestic demand. April 2009 metal-cutting machine tool production in China 55,200 units in March output growth than 01,100 units, year-on-year growth rate of -8.41%, slightly down; April CNC machine tool production in China of about 11,000 units, year-on-year growth rate fell sharply to -13.65%. A total of 1-4 months, the metal-cutting machine tools, metal forming machine tools production fell 20.2 percent and 20.5 percent, including metal-cutting CNC machine tools, CNC metal forming machine tools dropped by 18.7% and 8.3%, the machine tool industry is still in decline in the overall state of .

Machine tool industry is still in an adjustment period, machine tool product mix still is not quite rational, in the proportion of high-end products is still low, some high-end situation of dependence on imported machine tools has not yet been broken. Small and medium-sized enterprises are still facing difficulties in their operation, a serious decline in profit, low-end products, such as the plight of overcapacity. Machine tool industry in general business degrees to about half a year behind the economic cycle, so the industry is lagging behind the recovery to stabilize, we believe that the machine tool industry to mention the short term bottom, we still maintain its "neutral" rating.

Plasma Cutting Machine is easy to use which helps many companies save a lot of energy and people.

A computer in the cnc plasma used the image as a template to guide a plasma cutter as it cut the blade out of a sheet of industrial-grade steel. The system was so exact, it reproduced nicks and imperfections in the original sword.The system was so exact, it reproduced nicks and imperfections in the original sword.
The industrial computer control system utilizes a MISUBISHI servomotor system with industrial control software and a high clarity LCD.

SBPC-3100 cnc plasma cutter has American HUPERTHERM plasma unit.

The flange forming machine of SBKJ is characterized by its easy operation and maintenance and high efficiency, good seal ability,durability and solidity.
The flanging machine consists of a feeding frame, main forming machine and a shearing unit, which includes grinder and hydraulic shearing unit. The hydraulic shearing unit makes fixed cutting available with very little burr, which make it especially suitable for ventiduct production of large section.
It can be operated automatically with a maximum work speed of 6 m/min.

The flange machine is divided into four types: T-20?T-30?T-35?T-40 with their corresponding duct corner T-20DC?T-30DC and T-40DC.TDC flange making machine made by SBKJ may match and produce all the ducts in the DW144 standard, and has passed the HVAC PW/TMI(1987) pressure test.

TDC Flange and TDF Flanging machine:
Generally we will customize flange machines according to drawings or samples of different customers. Any requirements on shapes or configuration specs are available for our company to do.

From:http://sbkj.com

Compared to similar equipments in Switzerland,spiral duct machine of SBKJ has at least three advantages:

Advantage of 1: SBKJ is using the most advanced principles of the gas increase, and the hydraulic system used in Switzerland, requires quality control of hydraulic oil and temperature control during work. And the extension of life is resitricted by the dust generated by the work. SBKJ took this into account to avoid the above situation.

Advantages of 2: Mold can be changed to produce various spiral duct. This item has been applying for invention patents, which other similar products can not be done.

Advantages of 3: While the price of the purchase of equipment like sprial tubeformer is not most important to customers, but a small amount of money spent to purchase more advanced equipment is always good.

From:http://www.sbkj.com/news/index.html

Spiral duct is mainly used for air duct,and it has several obvious advantages against previous rectangular duct:
First,it can increase the strength, because every bite there is strengthening rib.
Second,High efficiency, feed speed of 38 meters per minute is impossible for rectangular duct production;
Third,Reduce consumption and save energy:It is of vortex shape when the air pass from the duct,using the sprial duct can reduce resistance.Morever,cleaning is very convenient because there are professional cleaning tools and no dirt corners on the inner wall of the sprial tube with outside corrugations and outside lock seam.
So it can not only save material, to be very economical, but also can improve the air flow.

There are two distinguishing  products of SBKJ:
One is flying shear type sprial tubeformer,model:SBTF- 1602 tube machine.What are the advantages of it?
First,as use of the stable forming dies,there is no size bias in the operation.The other advantage is that there are hardly scratches on the surface, so the it can satisfy the high requirements of places like airport and clean room.
Another product SBTF-1500D  tube former with a big technology breakthrough.It increases a roll-type cutting shear on the basis of our previous product SBTF-1500 pipe machinery.The advantage is:
no need of forming dies
can produce pipe between diameter 80mm and 1500mm with the change of one metal band
the breakthrough is the roll-type cutting shear,no noise and no scratche 

From:http://sbkj.com/news/index.html