MIG WELDING | MIG WELDER COMPONENTS | OPERATING THE MIG WELDER | METAL TRANSFER MODES
Posted on | January 5, 2011 | No Comments
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How Does an MIG Welder Operate?
- Welding is the joining together of two separate metal pieces with the use of extremely high heat, produced by an electric current, or arc. MIG (metal inert gas) welders work by feeding wire and gas simultaneously through a welding machine or gun. The wire and gas are fed continuously, because they are consumed continuously by the act of welding. The gas is an inert gas, and is used to protect or shield the area being welded from other gases that are present. The gas displaces the air around the weld. Four types of metal contact or transfer exist: short-circuiting, pulsed-spray, spray and globular.
MIG Welder Components
- The parts that make up a MIG welding unit are the control switch, the power source, the wire feed, the welding torch (or gun), the electrode or wire source and the gas supply. The torch is where all the parts come together for welding. The nozzle houses a gas diffuser and a contact tip, which has an opening that allows the electrode (wire) to move out of the gun. Pieces in the torch nozzle must be able to sustain very high levels of heat during the welding process; therefore the pieces in the nozzle are usually made of molded thermoset plastics, which do not soften.
Operating The MIG Welder
- Voltage, gas and electrode must be chosen for the type of metal being welded. In MIG welders, Argon is usually the gas of choice. By pressing the control switch, the electrode is fed into the machine, and the welding begins. Letting go of the control switch stops the welding. The contact tip inside the nozzle is usually copper, and is connected to the power source. The contact tip guides the electrode to the pieces being welded. Because it is connected to the power source, the contact tip transmits the electrical current to the electrode as it also guides it. The arc is created between the electrode and the metal to be welded. The seam or stream of molten metal is not deposited until the electrode touches the metal.
Metal Transfer Modes
- Each transfer mode requires different electrodes, currents and gases. Globular metal transfer uses carbon dioxide, and is used for flat steel surfaces, and when cost is an issue. Short-circuit metal transfer uses a low current, smaller wire and carbon dioxide, and is used only on ferrous materials, producing a much cleaner weld than the globular transfer. Pulsed spray uses Argon gas with the addition of a low level of carbon dioxide. Larger wire can be used, and the process works on almost all metals. It does, however, require a special power supply that can produce pulsed currents.
MIG Welding
HOW ARE BOREHOLES DRILLLED | DIFFERENT DRILLING TECHNIQUES | DIFFERENT METHODS
Posted on | November 18, 2010 | No Comments
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Guidelines to Drilling a Water Well
-
A well is an important source of water in rural locations.
For people who live outside the limits of a municipal water system, a well is the most common source of water. Drilled wells supply water from deep underground, which helps to ensure that the water is free of surface contaminants such as fecal coliform, pesticide residue or other pollutants. Many drilled wells are hundreds of feet deep.
Location
- The location of your well is of primary importance. Obviously, it needs to be drilled where there is water available. In addition, it needs to be close enough to your residence so that pumping doesn’t present unreasonable difficulties. The well should be as far as possible from any potential sources of pollution such as septic tanks, agricultural fields, feedlots, barns or highways. Any of these things could potentially introduce manure residue, pesticides, fertilizers or salt into your water source. Consider hiring a dowser to determine the best location for your well. Although some people are very sceptical about dowsers, others are great believers.
Lining
- When wells are drilled into the ground, they are lined by metal pipe that is inserted into the hole in sections. If the well goes deep enough that it begins to go through bedrock, the lining is no longer required. The metal pipe is left protruding from the ground by four or five feet as an access to the well. The well is connected to the residence by a pipe and is pumped up from underground to the residence. When hiring a well drilling company, do your homework and learn what kinds of linings they use, and whether they are comparable in quality and cost to other companies. For a domestic water system, it doesn’t pay to cut corners. Be sure to pay what is necessary to acquire a safe and dependable source of water.
Testing
- Most universities and local governments have agricultural extension services that offer water testing. As soon as you are able to get water from your new well, take a sample and have it tested for contaminants. Low levels of contaminants don’t necessarily disqualify a well from use; you can install various types of filtering systems, including particle filters and infrared systems, to deal with the problem. High levels of contaminants may indicate a problem with the well installation or the location, and this problem will need to be addressed.
MIG WELDING TIPS | WAYS TO USE | SHIELDING GAS | GROUNDING
Posted on | November 9, 2010 | No Comments
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MIG Welding Tips & Tricks
Metal inert gas welding.
MIG welding, or "metal inert gas welding," can be difficult if not approached properly. Welding with the MIG-welding method involves depositing a liquid metal onto workloads. Welding effectively bonds metals together permanently when the liquid metal that has been applied to the workloads cools. The bonding metal is heated and turned into liquid by a live current of electricity. MIG welders employ a number of tips and tricks to ensure they achieve proper, durable welds.
Shielding Gas
- Shielding gases surround the live electric currents used in all methods of welding. They are employed to keep the current steady, preventing erratic movement, which makes welding much easier and allows for more precise welding. Different shielding gases are employed in MIG welding, depending on the workload. Carbon dioxide shielding gases are the most efficient shielding gases to use when welding on thicker steel. A shielding gas featuring 25 percent carbon dioxide and 75 percent argon is recommended for use on thinner gauge steel. Argon by itself or in combination with helium is an efficient shielding gas for welding on aluminium. For welding on stainless steel, a combination of argon, helium and carbon dioxide is recommended.
Grounding
- Welding involves using live electric currents. A proper ground is essential in providing a constant, uninterrupted stream of electricity while welding. Sometimes it can be difficult to start MIG-welding equipment. Proper grounding also allows for quicker starting voltages. Copper is one of the most efficient electrical conductors available. Unfortunately, most modern grounding clamps are manufactured with plated steel featuring a small amount of copper on the clamps, according to Welding Tips and Tricks. Older grounding clamps used to be created out of 100 percent copper. They are much more efficient at providing starts and can still be purchased at certain locations.
Other Tips
- It can be exceedingly difficult to weld one-handed. The welder should steady her welding gun with both hands while MIG welding. This allows for more accurate and even welds. The electric current in MIG welding is drawn through a contact tip at the end of the welding gun nozzle. This contact tip should protrude about 1/4-inch from the nozzle to create efficient welds. For welding applications involving very thin sheet metal, having the contact tip stick out 3/4-inch will make welding easier.
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Bore hole Machine | borehole machine | borehole drilling rig Importers
Posted on | July 13, 2009 | 3 Comments
Borehole Drilling rigs aka Borehole drilling machines South Africa. When it come to supplying Hi quality down the hole bore hole machines in SOUTH Africa we are a specialist import company with professional service and knowledge. Need a Borehole Drilling rig call today. Borehole Water drilling is becoming very popular in South Africa and surrounding Countries. Call today to see if you are Vat exempt Call 021 5567203.
Borehole Machines Downhole Borehole Machine drilling rig bore hole machine
Product Information
The down-hole drill is a new, highly efficient and extensively applied open-air rock drilling equipment, which is extensively suitable for small and medium sized mines and the projects such as communications, national defense, water conservancy and stonework, in particular the rough and rugged terrains and land forms where other drills are unable to operate normally.
The machine can be used for digging for water and to drill blast holes on mines. It can also be used to drill under roads for cable lines.
The below list is the specifications for the machine.
SM110 Pneumatic and Hydraulic Down Hole Drilling Set Model
Suitable Rock Rigidity(f) 6-20
Bore Dia.(mm) 68-130
Pushing Length(mm) 1000
Rotation Speed(rpm) 0-70
Working Pressure(Mpa) 0.5-0.7
bar 5-7
Air Consumption(m3/min) 3.5-7.2?
cfm 124-424
Max. Pushing Force(N) 4500
Max. Lifting Force(N) 15000
N.W (kg) Drill Part 260
? Pumping Station 261
? Control Station 50
? Appendant 360
G.W (kg) Drill Part 4230
? Pumpting Station 330
? Control Station 65
? Appendant 362
Dimension Drill Part 2180×510×790
Diemension Pumpting Station 1170×980×1050
(L×W×H)(MM) Control Station 700×500×900
Note: Please be advised that you need to mention your depth requirements. The rods all 1m rod.
Please Note This machine is equipped to drill with a mud pump (water pump) or percussion drilling via air compressor. These items are not supplied with the machine.
See website for Further details Click here
Tags: Borehole drilling machines > borehole machine > borehole machines > borehole water drilling machines > Downhole borehole machine > dth down hole borehole machines
Welding machine | Mig Welder 131 C dual gas welding machine | Welding machine
Posted on | May 6, 2009 | No Comments
MIG WELDERS 131 C DUAL GAS/NO GAS WELDING MACHINE
Call: 0215567203
MIG131-Technical Data:
Main Voltage: 230V
Main Frequency: 50Hz
Absorbed Power: 2KW
Mains Fuse: 11A
Power Factor: 0.8
No Load Voltage: 28V
Adjustment Positions: 4 Steps
Current Adjusting Range: 25A / 35A / 50A / 75A
Dia. Usable Wire: ?0.6mm / ?0.8mm/?0.9mm
Duty Cycle: 20%@75A; 45%@50A; 90%@35A;
100%@25A
Insulation Class: H
Protection Degree: IP21S
Packing Dimension: 665 x 275 x 405mm
Net Weight: 26Kg (Include Acc.)
Gross Weight: 29Kg
Tags: Dual gas welding machine > Dual gas welding machines > Mig welders > Migwelder > Welder > Welders
Builders stilts | Tradesman stilts | Trade stilts
Posted on | May 6, 2009 | No Comments
Builders Stilts/Trademan Stilts
Call: 0215567203
Tradesman/Builders stilts are used as a substitution from the conventional scaffholding and long ladders. Used for indoor and outdoor decorating,installations and operating repairs such as suspended ceiling construction, ceiling circuit arrangement, pipe mounting and maintenance, prime spraying, cleaning, fruit plucking, branch trimming and insect eliminating etc. The newly designed Tradesman stilts are designed to imitate the movement features of the lower part of human body in line with the principle of human bionics, which enables you to walk at ease with your own feet on teh ground at no inconvenience at all. Tradesman Stilts are well acknowledged in many countries such as USAm, UK etc due to its easy usage, convenient operation, innovative design and nice apperance.
460mm - 765mm
Heavy duty yet light in weight
Made of special aviation anodised aluminium
Adjustable heel plates and adjustable leg tubes are attached
Dual spring system offers more of a natural walk immitation.
Builders stilts | Trade stilts | Tradesman stilts
Posted on | May 6, 2009 | No Comments
Builders Stilts/Trademan Stilts
Call: 0215567203
Tradesman/Builders stilts are used as a substitution from the conventional scaffholding and long ladders. Used for indoor and outdoor decorating,installations and operating repairs such as suspended ceiling construction, ceiling circuit arrangement, pipe mounting and maintenance, prime spraying, cleaning, fruit plucking, branch trimming and insect eliminating etc. The newly designed Tradesman stilts are designed to imitate the movement features of the lower part of human body in line with the principle of human bionics, which enables you to walk at ease with your own feet on teh ground at no inconvenience at all. Tradesman Stilts are well acknowledged in many countries such as USAm, UK etc due to its easy usage, convenient operation, innovative design and nice apperance.
380mm - 585mm
Heavy duty yet light in weight
Made of special aviation anodised aluminium
Adjustable heel plates and adjustable leg tubes are attached
Dual spring system offers more of a natural walk immitation.
Tags: Builders stilts > Construction > Trade stilts > Tradesman stils
Welders | Mig welders | 151 C-Dual gas | Mig welder
Posted on | May 6, 2009 | No Comments
MIG WELDERS 151 C- DUAL GAS/NO GAS WELDING MACHINES
Call: 0215567203
See website
MIG151 C MIG WELDER DUAL GAS NO GAS WELDER -Technical Data:
Main Voltage: 230V
Main Frequency: 50Hz
Absorbed Power: 3.75KW
Mains Fuse: 21A
Power Factor: 0.78
No Load Voltage: 36V
Adjustment Positions: 4 Steps
Current Adjusting Range: 30A / 50A /
75A /105A
Dia. Usable Wire: ?0.6mm / ?0.8mm/
?0.9mm
Duty Cycle: 15%@105A; 30%@75A;
65%@50A; 100%@30A
Insulation Class: H
Protection Degree: IP21S
Packing Dimension: 645 x 275 x 390mm
Net Weight: 27.8Kg (Include Acc.)
Gross Weight: 30.8Kg
Tags: Dual gas mig welder > Dual gas mig welders > Dual gas welder > Dual gas welders > Mig welder > Mig welders > Welder > Welders
Welding machine | Arc tig DC inventor welding machine | Welding machines
Posted on | May 6, 2009 | No Comments
Arc Tig DC Invertor Dual welding machine
Call: 0215567203
see website
Arc/Tig DC Inverter-Technical Data:
Model UNIT TIG 160P
Power Source-230V,50/60Hz,1phase
Rated Input Capacity KAV 4.8
Welding Range A 10~160
Open Voltage V 71
Arc Strike Method Contact &High Frequency
Pulse Time /
Air-resistance Time S 1~20
Duty Cycle % 40
Cold Method Fan Cooling
Weight kg 10
Dimensions mm 400*210*34
Tags: Arc tig DC Inventor dual welding machine > Arc tig DC Inventor dual welding machines > Dual welding machine > Dual welding machines > Welding machine > Welding machines
Pool heating | Solar pool panels | DIY | Solar pool heating
Posted on | May 6, 2009 | No Comments
Solar Pool Panels DIY R600 Solar Pool Heating
Call: 0215567203
Solar Temp Solar panels (made of durable and hard-wearing HDPE) are fitted to the roof. Water from the pool is channelled through the panels and is heated by the sun’s rays. The water is then returned to the pool by the existing pool pump. With such an efficient system temperatures between 22º C and 41º C are achieved. This system not only absorbs heat directly from the sun, but absorbs heat by conduction from your roof. In effect, the roof becomes part of the solar system.
Swim up to 10 Months of the Year
* No moisture build-up under collectors that could cause premature roof deterioration.
* Solar Temp’s unique design virtually eliminates wind load, making it ideal for windy provinces.
* Collector is easy to install and operate. 10 Year warranty.
* Affordable solar pool heating solution.
* Add Value to your swimming pool investment.
Tags: DIY solar pool heating > Pool heating > Solar pool heating > Solar pool panel > Solar pool panels
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