Plasma cutting

Nov 24, 2010 at 08:00 o\clock

Having the plasma cutter manufacturer right

by: sanben   Keywords: Plasma, cutting, machine

Plasma cutting machine use an inert gas and electrical current to create a powerful torch that can cut through metal. The gas is blown through the machine's nozzle at high speed along with an electrical arc. The arc heats up the gas and converts it into hot plasma. The heat of the torch melts the metal as it cuts, leaving smooth, clean edges.
Portable plasma cutters are used by contractors to cut metal while working out in the field. This makes it easy for mechanical contractors or HVAC servicemen to make needed repairs on-site instead of having to bring large pieces of metal back to the shop for cutting. Many times, all that is needed is a simple trim to make two metal pieces fit together. Having the plasma cutter manufacturer right there on the site keeps the job from slowing down while waiting for the fabrication shop to make the necessary adjustments.

The CNC plasma cutting machine arc system as described above has high cycle time. First, a torch operator must know some basic cutting parameters, such as the material to be cut, the thickness of the work piece, and the plasma gas to be used. Then, the operator must review a series of tables found in books to manually set many parameters such as the power settings on the power supply or the gas flow on the gas console. Having to look up additional parameters takes time and may result in operator error as manual input can be inaccurate.

In addition, some components such as the torch height control and the power supply have their own control, which can be redundant. Furthermore, there is no feedback mechanism between the components of the plasma arc system to optimize the operation of the plasma arc system.
Artists also use small plasma cutters to create unique works from metal. The tip of the plasma cutter can make very fine incisions in the metal, allowing the artist to make intricate patterns in the metal. Metal templates can also be created with a plasma cutter and used as a stencil for other forms of art.

Nov 19, 2010 at 04:15 o\clock

Plasma cutter power supply system

by: sanben   Keywords: plasma, cutter, plasma, cutting, machine

A plasma cutter uses this energy to your advantage. It has a nozzle with two gas passages and a center electrode negative. If cut close with power and space charge on the metal creates a very hot spark. A gas such as argon result of the disclosure surrounding the arc is extremely hot, the molecules move at a rapid pace, meet each other and release large amounts of energy. , Contain the unpredictable arc in a smaller limit, a second round of the protection of the gas stream. The plasma is cut at an incredible 30 000 degrees to - location, something. You can cut through sheet metal as thick as butter.


In addition,
plasma cutting machine  power supply typically includes: a main inverter circuit, the electric energy supplies in an arc on the plasma-plasma torch, and ignite with a constant power supply, DC-loop, a circuit for generating high frequency superimposed on a high voltage to a pilot arc between the electrode and nozzle of the plasma torch in the output voltage of the main circuit, a circuit that the output voltage of the main circuit between the electrode and nozzle, during the pilot-arc ignition and then makes the phase of the application of the output voltage between the electrode and the work piece so the pilot to make an arc main arc and a power control unit to the main switch, the circuit of circuits with high frequency and the pilot controlling the pilot arc, rotate and subsequently maintain the central arch supports. Understand that the CNC plasma cutter Power Device that these elements are usually contained in a single chassis contains. Although the main arc power is supplied by this type of equipment for plasma cutting power depends on the type of material being cut and thickness, etc., can reach a high value, as several hundred amperes. It is therefore necessary to create a circuit with high output capacity.

Sep 6, 2010 at 09:06 o\clock

The History of a Superinsulation Standard

by: sanben   Keywords: Square, Duct

An energy-efficient house without solar equipment. Designed by architect Christoph Schulte, this superinsulated home was the first Passivhaus building in Bremen, Germany.

 

More and more designers of high-performance homes are buzzing about a superinsulation standard developed in Germany, Square Duct manufacturer the Passivhaus standard. The standard has been promoted for over a decade by the Passivhaus Institut, a private research and consulting center in Darmstadt, Germany.

 

The institute was founded in 1996 by a German physicist, Dr. Wolfgang Feist. Feist drew his inspiration from groundbreaking superinsulated houses built in Canada and the U.S., including the Lo-Cal house developed by researchers at the University of Illinois in 1976, the Saskatchewan Conservation House completed in 1977, and the Gene Leger house built in 1977 in Pepperell, Massachusetts. Aiming to refine North American design principles for use in Europe, Feist built his first Passivhaus prototype in 1990-1991.

 

Feist later obtained funding for a major Passivhaus research project called CEPHEUS (Cost-Efficient Passive Houses as European Standards). Conducted from 1997 to 2002, the CEPHEUS project sent researchers to gather data on 221 superinsulated housing units at 14 locations in five countries (Austria, France, Germany, Sweden, and Switzerland).

 

The Standard Sets a Strict Bar

The Passivhaus standard is a residential construction standard requiring very low levels of air leakage, very high levels of insulation, and windows with a very low U-factor. To meet the standard, a house needs an infiltration rate no greater than 0.60 AC/H @ 50 Pascals, a maximum annual heating energy use of 15 kWh per Square Duct meter (4,755 Btu per square foot), a maximum annual cooling energy use of 15 kWh per Square Duct meter (1.39 kWh per square foot), and maximum source energy use for all purposes of 120 kWh per square meter (11.1 kWh per square foot). The standard recommends, but does not require, a maximum design heating load of 10 watts per Square Duct manufacturer meter and windows with a maximum U-factor of 0.14.

 

The Passivhaus airtightness standard of 0.6 AC/H @ 50 Pa is particularly strict. It makes the Canadian R-2000 standard (1.5 AC/H @ 50 Pa) look lax by comparison.

 

Unlike most U.S. standards for energy-efficient homes, the Passivhaus standard governs not just heating and cooling energy, but overall building energy use, including baseload electricity use and energy used for domestic hot water.

 

Thick Walls, Thick Roofs, and Triple-Glazed Windows

Most European Passivhaus buildings have wall and roof R-values ranging from 38 to 60. Wood-framed buildings usually have 16-inch-thick double-stud walls or walls framed with deep vertical I-joists. Masonry buildings are usually insulated with at least 10 inches of exterior rigid foam. To meet the Passivhaus window standard, manufacturers in Germany, Austria, and Sweden produce windows with foam-insulated frames and argon-filled triple-glazing with two low-e coatings.

 

Although the Passivhaus Institut recommends that window area and orientation be optimized for passive solar gain, the institute’s engineers have concluded, based on computer modeling and field monitoring, that passive solar details are far less important than airtightness and insulation R-value.

 

In the U.S. and Canada, the phrase “passive solar house” was used in the 1970s to describe houses with extra thermal mass and extensive south-facing glazing. Because of the possibility of confusing Passivhaus buildings with passive solar houses, most English-language sources use the German spelling of “Passivhaus” to reduce misunderstandings.

 

Gotta Have An HRV

Feist recommends that every Passivhaus building be equipped with a heat-recovery ventilator (HRV). Since the space heating load of a Passivhaus building is quite low, it can usually be met by using an air-source heat pump to raise the temperature of the incoming ventilation air. In most European Passivhaus buildings, the heat pump’s evaporator coil is located in the ventilation exhaust Square Duct manufacturer, downstream from the HRV, to allow the heat pump to scavenge waste heat that might otherwise leave the building. In this way, the ventilation ductwork becomes part of a forced-air heating system with a very low airflow rate.

 

In Europe, most homes are heated with a boiler connected to a hydronic distribution system. Since residential forced-air heating systems are almost unknown in Europe, many Passivhaus advocates declare that their houses “have no need for a conventional heating system” — a statement that reflects the European view that forced-air heat distribution systems are “unconventional.”

 

Passivhaus Comes Back to the U.S.

The first building in the U.S. that aimed to meet Passivhaus standards was a private residence built by architect Katrin Klingenberg in Urbana, Illinois, in 2003. The home included an R-56 foundation with 14 inches of sub-slab EPS insulation, R-60 walls, and an R-60 roof. Klingenberg specified triple-glazed Thermotech windows with foam-filled fiberglass frames.

 

Klingenberg later founded a nonprofit organization, the Ecological Construction Laboratory (E-co Lab), to promote the construction of energy-efficient homes for low-income and middle-income families. In October 2006, the E-co Lab completed Square Duct manufacturer  Urbana’s second Passivhaus building: a 1,300-square-foot home that resembled Klingenberg’s home in many ways.

 

As Klingenberg devoted more and more time to promoting Passivhaus buildings in North America, she decided to found the Passive House Institute US — basically, a North American outpost of the Darmstadt institute — in Urbana.

 

Although Klingenberg’s first and second Urbana homes were built to the Passivhaus standard, she didn’t bother to have the homes certified and registered. The first U.S. building to achieve that goal was the Waldsee BioHaus, a language institute completed in Minnesota in 2006. That building includes an R-55 foundation  Square Duct manufacturer with 16 inches of EPS foam under the concrete slab, R-70 walls, and an R-100 roof. The building’s triple-glazed windows were imported (at a high cost) from Germany.

 

How Do I Learn More?

An easy way to learn more about the Passivhaus standard is to visit the bulletin board and Web forum hosted by the Passive House Institute US.

 

In the United Kingdom, the Building Research Establishment has produced an excellent English-language primer on the Passivhaus standard.

 

A GBA blogger, Rob Moody, is sharing details of his ongoing Passivhaus project in a series of blog postings.

 

Builders and designers interested in learning more about the Passivhaus standard may want to invest $225 in a Passivhaus software program, the Passive House Planning Package. Available from the Passive House Institute US, the software Square Duct manufacturer is a spreadsheet-based tool that models a building’s energy performance to help designers fine-tune the specifications of a building aiming to achieve the Passivhaus standard.

 

Finally, a 2007 interview that I conducted with Dr. Wolfgang Feist has been posted on the Web by the Passive House Institute US.

 

Aug 30, 2010 at 07:45 o\clock

SPIRAL TUBEFORMING AND SPIRAL DUCTING TECHNOLOGIES

by: sanben   Keywords: Spiral, Tubeformer

ISM has developed spiral tubeforming equipment utilizing state-of-the-art engineered technologies to deliver the best Spiral Tubeformer in the industry. Their foundation is based on delivering machines that are built with quality, performance and dependability to ensure the best possible return on your investment. The company offers its spiral duct machines, which feature Spiral Smart Technology, touch-screen operator controls, PLC length control (standard), and are built, serviced and sold utilizing over 50 years of experience, and made in the USA. 

Jul 29, 2010 at 09:31 o\clock

The plasma cutter and the rolling table

by: sanben   Keywords: plasma, cutter

In operation the plasma cutting system of the invention provides safe and efficient cutting of metal sheets. As described above the system includes a plasma cutter, a rolling table pin support panel and cutting system support. The plasma cutter and the rolling table are supported by the cutting system support. The rolling table is adapted to be positioned on the cutting system support at a loading position and at cutting position. The operator positions the sheet metal to be cut on the rolling table while the table is in the loading position near table positioner. The operator then rolls the table to the cutting position near table positioner 84. The cutting position is beneath the cnc plasma cutter . A transparent curtain supported by cutter housing encloses the area around the plasma cutter. The curtain protects the operator from fumes generated during cutting.

A gantry is supported by the cutter housing, and the gantry supports the carriage which supports the plasma cutting machine . The cutting position is beneath the plasma cutter. The position of the plasma cutter is programmed in computer 296. The pinion gear at either end of the gantry is stepper motor driven. Movement of the cutter between the sides is stepper motor driven.In a preferred embodiment of the invention the table support rail is extended and a second table positioned at the end thereof. A second rolling table is supported on the extended portion of the table support rail. In this embodiment the operator loads one table while the plasma cutter cuts the metal on the other table.

 

source:news SBKJ