Gas soldering iron. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Gas soldering iron. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

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In the practice of motorists, one often has to deal with the need for soldering or welding. A few years ago, I accidentally saw a gas-powered soldering iron made in the GDR used for these purposes, and then the idea came up to make a similar one, but running on gas. The result exceeded all expectations - and now the gas soldering iron takes its rightful place in my toolbox.

Its operation during the repair of bodies, radiators, lugs of large-section copper cables confirmed the operability of the structure. The main advantages over the traditional "hammer" and a blowtorch are: the possibility of continuous soldering, maintaining the desired temperature, which is important when performing a large amount of work, as well as the ability to control the degree of heating.

Rice. 1 (click to enlarge) Gas burner: 1,2 - soldering iron holders; 3 - soldering iron rod lock; 4 - nozzle body; 5 - jet; 6 - crane PPB-e; 7 - handle; 8 - gas pipeline.

For the manufacture of a soldering iron, a cork-type crane PPB-1, used in the oil pipeline of a GAZ-53 car, was needed. Its refinement consisted in turning the front part up to 12 mm and threading M 12x1,5 mm. A jet with a hole with a diameter of 0,8 mm is made of brass and pressed into the faucet body. It should be noted that the holes in different taps differ by 0,1 mm in one direction or another. Therefore, the adjustment of the landing surface of the jet was carried out individually.

The material for the nozzle was a piece of stainless steel pipe with an inner diameter of 23 mm and a wall thickness of 1,5 mm. Processing of the workpiece to the desired dimensions is performed on a lathe. The back of the nozzle is also rolled on a lathe using a pressed bar.

For the gas pipeline-handle, a duralumin rod with a diameter of 20 mm and a length of 160 mm was used. A through hole with a diameter of 4 mm is drilled in it. In the absence of a special tool, this operation was performed in two steps from different sides. Further, one of the ends of the rod is machined to fit the existing diameter of the hose. The textolite handle is fixed with EDP glue. The threaded connection of the rod with the tap is sealed with FUM tape (sealant).

The tip of the soldering iron is made of a copper bar with a section of 20x20 mm. A rod with a diameter of 9 mm from the inlet valve of the MTZ engine was used as a rod. Connection with a sting - threaded M8 with subsequent caulking. (It makes sense to make several different shapes of the soldering iron tip at once, depending on the purpose.)

Gas soldering iron
Rice. 2. Soldering iron: 1 - tip; 2 - stock

Since the working pressure of a standard (household) gas reducer is not enough for the normal operation of the burner, an adjustable reducer is used. To prevent liquid gas from entering the burner channels, the cylinder is only in a vertical position.

It should be noted that this device is not more dangerous than a conventional blowtorch, and when working with it, you should follow the general fire safety rules, including monitoring the tightness of the gas pipeline connections.

The burner is ignited with a barely open tap. The crane regulates the strength of the flame and, consequently, the degree of heating of the soldering iron tip. To ensure complete combustion of the gas-air mixture, the distance from the nozzle to the heated surface of the soldering iron is at least 15 mm.

Author: Y. Shorets, Novoselki village, Vitebsk region.

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