Portable welding machine (arc). Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / welding equipment
Comments on the article
The basis of the welding machine of the first design is a laboratory transformer LATR for 9 A (Fig. 1). The casing and all 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 support made of textolite or getinax 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.
Fig.1. Portable welding machine (first design)
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 no more than 1,5 mm.
For the welding machine of the second design (Fig. 2), it is necessary to make a transformer. From the W-shaped transformer iron, a core with a cross section of about 45 cm2 is collected, the primary (network) winding is wound on it - 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.
Fig.2. Portable welding machine (second design)
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 mm2. 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.
In the welding machine of this design, electrodes with a diameter of 1,5 and 2 mm can be used. Electrodes are made as follows. 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.
Literature:
- V.G.Bastanov. 300 practical tips. Moscow worker, 1986.
Publication: N. Bolshakov, rf.atnn.ru
See other articles Section welding equipment.
Read and write useful comments on this article.
<< Back
Latest news of science and technology, new electronics:
Artificial leather for touch emulation
15.04.2024
In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>
Petgugu Global cat litter
15.04.2024
Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>
The attractiveness of caring men
14.04.2024
The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>
| Random news from the Archive Creating Super Potatoes
11.09.2023
As climate change raises concerns about global food security, researchers at McGill University are exploring ways to improve the sustainability and nutritional profile of potatoes by analyzing the genome sequences of nearly 300 potato varieties.
Professor Martina Strömvik and her team created a potato superpangen to identify genetic traits that could lead to the development of new potato varieties with improved characteristics.
"Our superpangen reveals the genetic diversity of potatoes and allows us to identify genetic traits that can improve modern varieties. It includes data on 60 species and represents the most extensive collection of genomic data on potatoes and their relatives."
Researchers say wild potato species can serve as teachers, helping to understand which genetic traits play an important role in adapting to climate change and extreme weather, as well as improving food quality and food security.
To create the potato pangene, the researchers used supercomputers to analyze data from publicly available genetic data banks, including repositories in Canada, the United States and Peru.
Scientists hope pangen will help answer many questions about the origins and evolution of this important crop, which was domesticated by indigenous people in the mountains of southern Peru nearly 10 years ago. In addition, these data can be used to identify specific genes that contribute to the development of more resistant potato varieties, using both traditional breeding methods and gene editing techniques.
"Researchers hope to develop plants that are resistant to various diseases and can better survive extreme weather conditions such as heavy rains, frosts and droughts," said Prof Strömvik.
|
Other interesting news:
▪ Google Glass for the NYPD
▪ Information about humanity will be sent into space
▪ Fengmi Laser TV C3 Ultra Short Throw Projector
▪ Helium discovered outside the solar system
▪ multimedia refrigerator
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ site section Frequency synthesizers. Selection of articles
▪ article The situation is worse than the governor's. Popular expression
▪ article Are there many details in the Lego constructor? Detailed answer
▪ article Health Camp Staff. Standard instruction on labor protection
▪ article Capacitive relay. Encyclopedia of radio electronics and electrical engineering
▪ article How to make inscriptions on flower petals. Chemical experience
Leave your comment on this article:
All languages of this page
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua
2000-2024
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese