RU2206437C1 - Welding pencil "swark" for thermite welding or cutting - Google Patents

Abstract

FIELD: welding systems, possibly used for rescue works, in field condition and in home when there are no power sources. SUBSTANCE: apparatus includes thin-wall tube having at one side thermit mixture in the form of pressed rod with envelope of combustible film material. Plug closes other end of tube. Thin-wall tubular casing-holder may be replaced from opposite sides onto tube until limiting stop. One end of rod is arranged in said tube. Depending upon composition of rod it is possible to perform welding, surfacing and cutting of metal. EFFECT: enhanced conditions for exploitation, transporting and storing, enlarged manufacturing possibilities of welding process. 2 dwg

Description

 The invention relates to welding production and is intended for use in thermite welding by fusion, cutting and surfacing of metals and alloys (including non-ferrous) in the conditions of emergency rescue operations, work in field and domestic conditions in the absence of other energy sources (mains, gas or an electric generator, gas cylinders).

 Known termite rod according to the patent of the Russian Federation 1833272, 23 K 23/00, 08/07/1993, containing a shell of non-combustible material in order to concentrate the burning energy of the thermite mixture and protect the rod from mechanical stress and moisture. A disadvantage of the known device is that in the process of using a termite rod during welding due to the absence of a holder, the welder is not protected from the emitted hot gases and the conditions for using the rod in any necessary position are not created.

 The closest analogue of the claimed invention is a welding pencil according to the patent of the Russian Federation 2139174, 23K 23/00, 10.10.1999, made in the form of a thin-walled tube filled with a thermite mixture, on which is placed a holder case made of combustible material with the possibility of its reinstallation to a restrictive emphasis from combustible material. The tube has a plug that covers it on one side. A disadvantage of the known device is the reduction of its operational properties during storage and transportation due to the lack of sealing of the thermite mixture, in addition, in the process of burning a tube having a certain wall thickness, slags are formed that adversely affect the formation of the weld.

 The task to which the invention is directed is to improve the quality of the welding and cutting process, improve consumer properties and expand the technological capabilities of the device.

 EFFECT: improved operating, transportation and storage conditions due to hermetic packaging of a welding rod included in the device, expansion of technological capabilities of the thermite welding process associated with the possibility of using a flexible welding rod and the possibility of heating the rod in domestic conditions immediately before welding.

 The technical result is achieved by the fact that in a welding pencil for termite welding or cutting, containing a thin-walled tube with a thermite mixture placed on one side of it, a plug that covers the tube from the other end, a thin-walled tubular holder case made with the possibility of reinstalling it from opposite sides to the tube to the limit stop, the thermite mixture is used in the form of a pressed rod with a sheath of combustible film material, while the rod is installed in the said tube with one end th.

 The use of a film of combustible material allows not only sealing the thermite core, protecting it from moisture, etc., but also provides, if necessary, the possibility of heating it immediately before the welding or cutting process in domestic conditions, for example in hot water. In addition, depending on the binder used in the manufacture of the pressed rod, it is possible to obtain a flexible material, which, together with the use of the said shell, allows it to be completely safely exposed to adverse effects during transportation and operation (shock, etc.), as well as to give the rod the necessary shape . Combustible film material practically does not participate in the formation of slag during the welding process, which contributes to the good formation of the weld.

 In FIG. 1 shows a welding pencil in a state of storage and transportation; figure 2 - welding pencil, prepared for work.

 The proposed welding pencil is made in the form of a thin-walled tube 1, in which, on the one hand, an extruded thermite rod 2 with a sheath 3 made of combustible film material, such as adhesive tape, is installed, on the other hand, with a closed plug 4, while the tube 1 is tightly worn on the side of the rod 2 the holder case 5 in the form of a thin-walled tube, the end of which is also closed by a plug 4, the length of which is equal to or greater than the total length of the tube 1 and the protruding part of the termite rod 2. The holder case 5 is made with the possibility of its transfer Fitting of the tube 1 from the opposite end to a limiting stop 6. Welding pencil completed thermite 7 match.

 Preparing the device for work. The holder case 5 is removed from the tube 1 and put on it from the other side to the stop 6, providing ease of use of the device during the welding process and opening the thermite rod 2 protruding from the tube 1. In this position (Fig. 2), the welding pencil is convenient and safe in work, provides the possibility of welding as a conventional electrode in electric arc fusion welding.

 Then, using a termite match 7, a thermite rod is ignited, and a termite reaction begins, propagating along its axis. With a hand holding the holder-holder 5, the welder presses the termite rod with the burning end to the metal to be welded and, after 3-4 seconds after heating the metal with spiral movements, performs welding.

 When changing the composition of the rod, it is possible to conduct both welding and surfacing, as well as metal cutting.

Claims (1)

 A welding pencil for thermite welding or cutting, comprising a thin-walled tube with a thermite mixture placed on one side of it, a plug that covers the tube on the other hand, a thin-walled tube holder holder made with the possibility of reinstalling it from opposite sides onto the tube to a limit stop, different the fact that the thermite mixture is used in the form of a pressed rod with a shell of combustible film material, while the rod is installed in the said tube at one end.

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