Portable welding machine. Encyclopedia of radio electronics and electrical engineering

Encyclopedia of radio electronics and electrical engineering / welding equipment

 Comments on the article

First design

The basis of the welding machine of the first design is a laboratory transformer LATR for 9 amperes (Fig. 1). The casing, fittings are removed from it, only the winding remains on the core. In the transformer of the welding machine, it will be primary (network). This winding is insulated with two layers of electrical tape or varnished cloth. A secondary winding is wound over the insulation - 65 turns of wire or a set of wires with a total cross section of 12-13 mm². The winding is reinforced with electrical tape. The transformer is installed on an insulating stand made of textolite or getinaks inside a casing made of sheet steel or duralumin with a thickness of not more than 3 mm. In the cover of the casing, on the back and side walls, holes are made with a diameter of 8-10 mm for ventilation. From above strengthen the handle from a steel bar.

An indicator light, a switch for 220 V, 9 A and terminals of the secondary winding are brought to the front panel - a cable with an electrode holder is connected to one of them, a cable is connected to the other, the second end of which is pressed against the workpiece during welding. In addition, this last terminal must be grounded during operation. AC indicator lamp type SN-1, SN-2, MN-5 indicates that the device is turned on.

The electrodes for this apparatus must have a diameter of 1,5 mm.

Second design

For the welding machine of the second design (Fig. 2), it is necessary to manufacture a transformer. From the W-shaped transformer iron, a core with a cross section of about 45 cm is recruited², wind the primary (network) winding - 220 turns of PEL wire 1,5 mm. Branches are made from the 190th and 205th turns, after which the winding is insulated with two or three layers of electrical tape or varnished cloth.

The secondary winding is wound over the insulated primary winding. It contains 65 turns of wire or a set of wires with a total cross section of 25-35 mm.². In the set, it is best to use wires of the PEL or PEV type 1,0-1,5 mm. As in the first design, the finished transformer is fixed on an insulating stand and placed in a casing. The casing walls must be at least 30 mm away from the transformer. On the front panel, in addition to the light bulb, switch and terminals, a switch is output that regulates the current strength.

Making electrodes

In the welding machine of this design, electrodes with a diameter of 1,5 and 2 mm can be used. The electrodes are made as follows. A steel wire of the appropriate diameter is cut into pieces 350 mm long, cleaned with sandpaper and covered with a coating consisting of crushed chalk and liquid glass (silicate glue). To make the coating even, the wire is vertically immersed in the coating, leaving a clean end 30-35 mm long on top, and slowly removed; immediately, each electrode is hung on a rope with a clothespin to dry. After drying, the electrodes are ready for use.

You must wear a mask while working. You cannot connect this unit to a home network, as it consumes about 3 kW. You can use the device in the workshop if there is an electrical network to which it is allowed to connect devices with a power of up to 5 kW.

Attention! Check grounding before starting work. Wear dry canvas overalls and gloves while welding. Place a rubber mat under your feet. Don't work without a mask.

Author: Bastanov V.G.; Publication: cxem.net

See other articles Section welding equipment.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

The threat of space debris to the Earth's magnetic field 01.05.2024

More and more often we hear about an increase in the amount of space debris surrounding our planet. However, it is not only active satellites and spacecraft that contribute to this problem, but also debris from old missions. The growing number of satellites launched by companies like SpaceX creates not only opportunities for the development of the Internet, but also serious threats to space security. Experts are now turning their attention to the potential implications for the Earth's magnetic field. Dr. Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics emphasizes that companies are rapidly deploying satellite constellations, and the number of satellites could grow to 100 in the next decade. The rapid development of these cosmic armadas of satellites can lead to contamination of the Earth's plasma environment with dangerous debris and a threat to the stability of the magnetosphere. Metal debris from used rockets can disrupt the ionosphere and magnetosphere. Both of these systems play a key role in protecting the atmosphere and maintaining ... >>

Solidification of bulk substances 30.04.2024

There are quite a few mysteries in the world of science, and one of them is the strange behavior of bulk materials. They may behave like a solid but suddenly turn into a flowing liquid. This phenomenon has attracted the attention of many researchers, and we may finally be getting closer to solving this mystery. Imagine sand in an hourglass. It usually flows freely, but in some cases its particles begin to get stuck, turning from a liquid to a solid. This transition has important implications for many areas, from drug production to construction. Researchers from the USA have attempted to describe this phenomenon and come closer to understanding it. In the study, the scientists conducted simulations in the laboratory using data from bags of polystyrene beads. They found that the vibrations within these sets had specific frequencies, meaning that only certain types of vibrations could travel through the material. Received ... >>

Random news from the Archive Movement speed record using magnetic levitation 26.04.2016 The Shanghai Maglev, the world's first commercial maglev railway line, holds the maglev continuous speed record of 431 km/h. (The one-time record for passenger trains was set in Japan last year at 603 km/h.) But the absolute record belongs to the 846 US Air Force test squadron at the Holloman Air Force Base near the city of Alamogordo (New Mexico), which is engaged in "horizontal flights" - launching special rocket sleds along various high-speed tracks. The most famous is the 6m Holloman High Speed ​​Test Track, which set the world rocket sled speed record of Mach 212 or 2003 m/s in 8,6. And on another track, 2 meters long, equipped with superconducting magnets, the 885 Test Squadron just set a new world record for a magnetic levitation sled - 640 km/h. Moreover, this is the second record in a row - a week earlier, testers dispersed a magnetic sled weighing 846 kg to a speed of 1018 km / h. The previous record, 907 km/h, set at the same test site, lasted more than two years. It took military engineers six months to prepare the current record races. To ensure superconductivity, the magnets were cooled with liquid nitrogen to plus four degrees Kelvin. Despite the impressive speed, the engineers of the test squadron believe that this is not the limit. Their goal is to achieve hypersonic speeds of Mach 10 or 12 km/h, and designers are already working on using lighter materials in the sled for the next record.

Other interesting news:

▪ Intel Optane DC - the first RAM with 3D XPoint chips

▪ Gorilla takes a stick

▪ SpaceX and NASA are looking for places to land on Mars

▪ New 802.15.4e/g wireless protocol stack for CC1310

▪ Superconductor without limits

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site for those who like to travel - tips for tourists. Article selection

▪ article Mass culture. Popular expression

▪ article Where can I protect my car from theft with a flamethrower? Detailed answer

▪ article Bear's ear. Legends, cultivation, methods of application

▪ article Bleach shellac. Simple recipes and tips

▪ article Simple FM transceiver. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages ​​of this page

Arabic	Hebrew	Polish
Bengali	Hindi	Portuguese
Chinese	Italian	Spanish
English	Japanese	Turkish
French	Korean	Ukrainian
German	Malay	Vietnamese

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua
2000-2024