Who invented electric welding? Who invented welding electrodes?

In 1892, the Russian Slavyanov successfully researched the practical scheme of the current metal arc welding method. In particular, in 1904 the Swede Oscar Kjellberg built the world's first electrode factory, the OK electrode factory of ESAB. During the same period, a large number of studies have been carried out on the coating effect of welding rods in Europe and the United States; In 1910, Sweden invented mineral-type thick coating electrodes, in 1919, the United States invented paper wrapped on the welding core, and proposed the initial type of cellulose electrodes, and in 1921, the British proposed to use marble and fluorite to manufacture welding rod coatings.

In 1917, the European Yi N. Joones invented the mechanical pressing electrode, and in 1927, the United States began to produce electrodes in large quantities with machinery. With the continuous development of metallurgical industry and machinery industry, especially since the Second World War, the production of welding rods has been greatly developed, and many new coating types and welding rod varieties have appeared, and the performance has been further improved. In 1964, Japan successfully developed "harmless" electrodes, and in the 70s of the 20th century, low-dust electrodes, ultra-low hydrogen electrodes and refractory moisture-absorbing electrodes were developed, which improved the quality of electrodes to a new level.

The manufacturing of electric electrodes in China began in 1949, at first using semi-mechanical pneumatic electrode pressing, and later developed a spiral continuous pressing, and there are production auxiliary equipment such as shredding machines and wire feeders. The welding rods produced are mainly low-carbon structural steel electrodes based on oxide mineral types. After 1956, a large number of machine-made electrodes began to be used, and the varieties of welding rods gradually expanded, and various types of ilmenite, titanium, titanium-calcium and low-hydrogen electrodes appeared one after another.

In terms of welding rod varieties, it has also developed from imitation in the early days of liberation to independent development of various types of welding rods, which has been able to meet the needs of important engineering construction from general machinery to high-pressure vessels, ships, and offshore platforms.

In 1881, the Frenchman Demeritens invented the first carbon arc welding machine. In 1898, the German Klerbacterschmidt invented copper electrode arc welding. In 1919, Halslag invented AC welding.

In 1923, Stordy invented surfacing welding. In 1926, Langmuir invented atomic hydrogen welding in the United States. 1930, former Soviet Union.

Robinov invented submerged arc welding.

In 1936, Wasserman of Switzerland invented low-temperature brazing. In 1943, BEHL invented ultrasonic welding in the United States.

In 1944, the British Carl invented ** welding.

The purpose of the electric welding machine is to use the high-temperature arc generated by the positive and negative electrodes in an instantaneous short circuit to melt the solder and the welded material on the electrode, so that the contact object is combined. Its structure is a high-power transformer. Welding machines can generally be divided into two types according to the type of output power supply, one is AC power supply and the other is direct current.

Using the principle of inductance, the inductance will produce a huge voltage change when it is turned on and off, and the high-voltage arc generated by the positive and negative electrodes when they are short-circuited in an instantaneous short circuit is used to melt the solder on the electrode to make them atomically combined.