GB KORE ARC, a proud associate of KORE group of Companies is a leading manufacturer and importer of Welding Electrodes, CO2 Wire, Flux Core Wire, Welding Inverters of ARC, TIG, MIG, SAW and PLASMA Cutting, Welding Cable (Copper and Aluminium) and all types of abrasives both Grinding and Cut Off Wheels.
GB KORE ARC with experience of over 30 years in the field is always committed to share its technological breakthroughs with the market and society as well by introducing quality products with latest technology. The entire range of products from GB KORE ARC are thoroughly examined and tested by a team of our experienced and committed R&D Professionals who assists in quality maintenance, improvement of existing technology, and making available Superior Technological products to the present generation.
GB KORE ARC is a leading supplier of Welding Products. It has a sales and distribution network across South and North India with Service and Technical Support Facility Centers at Chennai, Cochin, Bangalore and Hyderabad. The company in quest to maintain its leading position will continue its journey of technological breakthrough and new innovations and there by serving you better all the time.
Welding Machine Working
The basic power supply design will take AC power from the utility mains and convert it to DC for the welder. Good designs will not be destroyed by common overloads.
A transformer style welding power supply converts the high voltage and low current electricity from the utility mains into a high current and low voltage, typically between 17 to 45 volts and 55 to 590 amps. A rectifier converts the AC into DC.
This design typically allows the welder to select the output current by either moving a magnetic shunt in and out of the core of the transformer or allows the welder to select the output voltage from a set of taps on the transformer. These machines are typically the least expensive.
Transformer designs are often bulky because they operate at the utility mains frequency of 50 or 60 Hz. Such low frequency transformers must have a high magnetizing inductance to avoid wasteful shunt currents. The transformer may also have significant leakage inductance for short circuit protection. The leakage inductance may be variable so the operator can set the output current
Since the advent of high-power semiconductors such as the insulated gate bipolar transistor (IGBT), it is now possible to build a switching power supply capable of coping with the high loads of arc welding. These designs are known as inverter welding units. They generally first rectify the utility AC power to DC; then they switch (invert) the DC power into a step down transformer to produce the desired welding voltage or current. The switching frequency is typically 10 kHz or higher. Although the high switching frequency requires sophisticated components and circuits, it can drastically reduce the bulk of the step down transformer. The circuitry can also provide features such as power control and overload protection. The high frequency inverter-based welding machines can be more efficient and have better control than non inverter welding machines.
The IGBTs in an inverter based machine are controlled by a microcontroller, so the electrical characteristics of the welding power can be changed by software in real time updates. Typically the controller software will implement features such as pulsing the welding current, variable ratios and current densities through a welding cycle, variable frequencies, and automatic spot-welding; all of which would be prohibitively expensive in a transformer-based machine but require only program space in software-controlled inverter machine.
What are Abrasives..?
Abrasives are very hard, brittle substances that have been crushed to create particles with cutting edges, much as breaking a glass produces shards with sharp edges. Hardness and sharp edges give abrasives the ability to grind and polish. As with a knife edge, the hardness helps retain sharpness, but with sufficient use the cutting edges of any abrasive, even diamond, become rounded over. An abrasive must be at least as hard as the substance it is to abrade. Today most abrasives are synthetic.
What is CO Wire?
Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) welding or metal active gas (MAG) welding, is a semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun. A constant voltage, direct current power source is most commonly used with GMAW, but constant current systems, as well as alternating current, can be used. There are four primary methods of metal transfer in GMAW, called globular, short-circuiting, spray, and pulsed-spray, each of which has distinct properties and corresponding advantages and limitations.
Originally developed for welding aluminum and other non-ferrous materials in the 1940s, GMAW was soon applied to steels because it allowed for lower welding time compared to other welding processes. The cost of inert gas limited its use in steels until several years later, when the use of semi-inert gases such as carbon dioxide became common. Further developments during the 1950s and 1960s gave the process more versatility and as a result, it became a highly used industrial process. Today, GMAW is the most common industrial welding process, preferred for its versatility, speed and the relative ease of adapting the process to robotic automation. The automobile industry in particular uses GMAW welding almost exclusively. Unlike welding processes that do not employ a shielding gas, such as shielded metal arc welding, it is rarely used outdoors or in other areas of air volatility. A related process, flux cored arc welding, often does not utilize a shielding gas, instead employing a hollow electrode wire that is filled with flux on the inside.
What is an Electrode?
In arc welding an electrode is used to conduct current through a work piece to fuse two pieces together. Depending upon the process, the electrode is either consumable, in the case of gas metal arc welding or shielded metal arc welding, or non-consumable, such as in gas tungsten arc welding. For a direct current system the weld rod or stick may be a cathode for a filling type weld or an anode for other welding processes. For an alternating current arc welder the welding electrode would not be considered an anode or cathode.