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

SBKJ will participate in EASTPO 2009. Welcome all friends coming to our booth.

Hall: A905
Stand: E4
Date:July 15-18, 2009
Main products:tubeformer,spiral tube making machine ,duct machine ,spiral duct machine,elbow machine ,cnc plasma,pipe machinery........
 
Eleventh Shanghai International Machine Tool Show will be held July 15-18, 2009 at the Shanghai New International Expo Center soon.East China with the center of Shanghai, is China's most developed manufacturing sector with high economic growing.
With Shanghai as the leader of the Yangtze River Delta economic zone, has to occupy one-third of the national machine tool market.

By then, the exhibition area will be expanded from 70,000 to 100,000 square meters, accounting for 8 Pavilion.There will be 10 million professional audience,mainly from the automotive components, machining, mold manufacturing, shaping machinery,machine tool, defense, aviation and space,general machinery, shipbuilding,metal products industry and so on.

Theme of the exhibition this time is "common achievements, and win-win future."

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

Jiangyin Sanben Technology Co., Ltd. is a new high-tech enterprise approved by the Jiangyin Technical Association, and is a member of the China Cold Curved Steel Section Association. The company is located in the Yangtze River Delta, nearby to the regional trade center of Shanghai.

The company mainly manufactures cold curved shaping machinery such as: flat duct oval machine, duct forming machine, tube forming machine, plasma cutters...The employees are experienced senior technicians and overseas returned COPRA students from Switzerland and Germany. They also have many years experience in close cooperation with many famous domestic universities  such as the Central China University of Science and Technology.

With the support of  the departments of  high technology, R&D, and  administration in the universities, as well as advanced marketing ideas and service system, they can supply high quality services and products to domestic and international enterprises.

By cooperating with famous Swiss enterprises, they master the most advanced technology of making spiral tubeformer of central air conditioner  and high-accuracy production line in the domestic market.

Guided by the enterprise spirit of "sincerity oriented", using CAD / CAM software and electromechanic technology, the company is engaged in the development of new products, new techniques and new technology. They aim to satisfy every customer by offering quality products, reasonable price, prompt delivery tome and excellent services.

In recent years, the Japanese construction machinery exports continued to grow substantially. 2003 (financial year April 1, 2003 -2004 in March 31, the same below) to 2007, the Japanese construction machinery exports grew by almost 1.5 times the average annual growth rate of 29%. Japan Construction Machinery exports year after year over the amount of domestic shipments, exports in 2007 is the amount of domestic shipments by about 2-fold. As of April 2008, the Japanese construction machinery exports has been 73 months growth, of which exports to Asia for growth in 19 months.
Japan Construction Machinery North America's largest export market. 2005, Japan's exports to North America accounted for 39% of total exports, the European Union and Western Europe accounted for 18%, Asia accounted for 16% (of which China accounted for 4%), the Middle East 9%, 6% Oceania, CIS and Eastern Europe 5%, Africa 4%.

Main technical data: Diameter range Φ80-Φ1500mm Tube Length 120-8000mm Thickness of Strip 0.4-1.2mm Width of Strip 137-140mm Strip Speed 1-38/min Dimension (L x W x H): 2650*1550*2000mm Lockseam Outside tube,on the inside on request Weight 2200kg Control System PLC automatic control Compressed air power 0.5-0.7kmp Electrical 380V/3PH/50HZ (Acorrding to customer’s request) Main Power 5.5kw The power of cutting motor 4kw Suitable Material Aluminum, Stainless steel, Galvanized steel