CS220252B1 - Tool for mechanized cleaning of welding torches - Google Patents

Abstract

The present invention provides for the cleaning of welding torches by electric arc welding with an electrode in the protection of gases from a metal spray from a welding bath, in automated and non-refined welding stations. The essence of the invention is that the tool according to the invention consists of a clamping body provided with a clamp for clamping, on which spring relief, external and internal spring fasteners are fastened. The inner diameter of the inner spring must be 0.5% to 1.5% smaller than the nominal outer diameter of the torch tip and the outer diameter must be the same or 1 to 2% smaller than the diameter of the gas nozzle mouth. The outer cleaning spring is coiled in the sense of rhythm of the clamping collar and the inner spring is coiled in the opposite direction to the direction of rotation of the clamping body.

Description

220252

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for mechanically cleaning welding torches by welding an electric arc melting the electrode to protect the gases from the metal spray from the weld bath.

In electric arc welding in the gas shielding, the necessary unfavorable accompanying phenomenon is the formation of a large amount of spray gun, which is deposited on the cation-active torch, in the gas nozzle and the contact point of the welding current feed in the welding process. Spraying over a longer period of welding clogs the space-bound cavity incremented by the layer, which deteriorates until the gas flow is completely prevented. Last but not least, the quality of the welds is impaired by the formation of pores and oxides, or the complete destruction of the weld metal. In the practice of welding in gas protection, the burners are periodically cleaned manually by disassembling the torch tip and cleaning the cavity gas nozzle and the contact surface of the welding current supply tip with a scraper or scraper.

In the mechanized, automated roboitized welding process at the welding breaks in the inter-operation times of the brewing at the workplace, during the change of position and similar, the cleaning of the welding torch is not realistically, and it is also unacceptable for the movement range of the mechanized torch carrier or the industrial arm to be roblota is out of the security dooes the presence and movement of people.

Known devices and methods of cleaning, programmable single-purpose welding alloys and welding robots in honeycomb sections at breaks of welding are designed in such a way that an operation in which the the burner is periodically fed to a particular mechanical cleaning device equipped with a squeegee tool in the form of a special cutter shaped according to the type of welding torch, or in the form of a suitable shaped rotary steel brush. The welding device slips the welding boron into a non-rotating tool that cleans it from the spatter and the cleaned torch is brought back into the welding area.

A disadvantage of these methods of cleaning the burners is the need for special cutters and, on the other hand, damage to the surface and the gradual erosion of the torch tips by scratching after a short time cleaning. In the case of brush cleaning, the service life of the tool is disadvantageous. Brush metal bristles quickly and only cleans the torch tip. Slamming burners, the interior of which is shaped so that the diameter of the mouth of the gas nozzle is less than the diameter of the inside of the cavity, i.e., the hollow is, for example, conical, which in practice is often the case, then the tool in the form of a reamer cannot be used.

The aforementioned drawbacks are largely eliminated by the mechanical cleaning tool of the welding torches of the invention, which consists in that it consists of a clamping body fixed by a shank and clamped in a clamping tongue to which it is resilient the pre-tensioned cleaning springs, namely the external cleaning spring mounted on the outer cylindrical surface of the clamping body, and the internal cleaning spring inserted into the concentric cavity in the clamping body, the internal diameter of the internal cleaning spring being 0.5% to 1.5% the smaller the nominal outer diameter of the outer cleaning spring must be the same, but 1% to 2% less than the diameter of the burner mouth. The tool is further characterized in that the external cleaning spring is coiled in a coincident sense of rotation of the clamping collet and the clamping body, and the inner spring is coiled in the opposite sense of rotation of the clamping body. The tool for mechanically cleaning the welding burners of the invention is to remove the cleaning of the cleaned surfaces by a rotary tool. A tool consisting of coil-spiral springs of such dimensions and shapes that the dio cavities of the burner are sucked and at the same time wound on the portions of the terminals with a resilient bias for their simultaneous rioic acid, thereby effecting an intensive wiping and cleaning of the active-active surfaces of the burner cavity and from an adherent metal spray of weld metal. Another advantage of the tool according to the invention is the ability to clean the inner cavity and active parts of the welding torches and also the rlotting shapes of their cavities as cylindrical, for example conical, with graded diameters and the like, since the cleaning tool is a suitable elastic element it also gets into the ripples and protrusions of these cleaned cavities. A further significant advantage is that the problem of the invention is solved by the fact that the functional part of the cleaning device is the coiled spiral springs instead of the gray tool, so that the wear of the active parts of the torch by the tapering but not only by intensely wiping the trapped granule particles does not occur. at the same time, the metal spray and the rotation of the helical tool simultaneously carry the loosened granulate of the metal spray out of the cleaned torch of the welding torch.

In the accompanying drawings, FIG. 1 is a cross-sectional view of an embodiment of a welding torch cleaning tool. The cleaning tool is shown here in the clamping collet and inserted into the welding torch cavity. FIG. 2 is an elevational view and a plan view of a tool according to the invention;

Claims (3)

by marking functional shapes and dimensional ratios. Fig. 3 shows the characteristic dimensions of the gas torch of the welding torch. The cleaning tool according to the invention consists of a clamping body 1 provided with a stopper clamped in the clamping collet S of the cleaning device, to which the cleaning springs are attached to the spring-loaded spring, namely the outer cleaning spring 3, which is mounted in the outer cylindrical surface of the clamping body. the body 1 and the inner cleaning spring 2, which is inserted into the concentric cylindrical cavity in the clamping body 1. The inner diameter of the inner cleaning spring 2 must be 0.5% to 1.5% less than the nominal outer diameter. contact torch tip 8. The outer diameter of the outer cleaning spring 3 must be straight or 1% to 2% smaller than the diameter "d" of the gas nozzle mouth 7 of the burner 6. inserting the cleaned burner 6 has a portion of the threads extending relative to its longitudinal axis, thereby retracting the elastic claw after insertion into the gas nozzle cavities 7 biasing, which pushes the threads of the external cleaning spring 3 along its rotors towards the entire inner surface of the gas nozzle 7 of the torch 6, even if the surface is not cylindrical but has a conical diameter, shoulder, recess, but is conical. The offset as eccentricity "e" has the value: L, 03. D - d, where "D" is the largest diameter in the gas nozzle cavity of the burner 7. The diameter of the coil springs from which the coil springs 2, 3 must be so tight that the dimensional conditions applicable to the correct and reliable resilience of the spring bias of these spring clamping bodies 1 are met. The outer diameter of the cylindrical surface of the clamping body 1 on which the outer cleaning spring is fitted 3 should be · 1% to 2.5% larger than the free inner diameter of the free unprepared outer cleaning spring 3. Diameter! The cylindrical concentric cavity for receiving the inner cleaning spring 2 is to be less than 1% to 2% than the nominal outer diameter of the free, non-predetermined inner cleaning spring 2. The outer cleaning spring 3 is coiled in a sense of riotation of the clamping collet 5 with the clamping The inner cleaning spring 2 is wound in the opposite direction to that of the clamping body 1 of the cleaning tool. For example, in the right-rotational sense of rotation of the cleaning tool, the outer cleaning spring 2 must be coil-wound. Thus, a one-way self-locking of the resilient clamping of the cleaning springs 2, 3 caused by the rotating action-clamping body 1 of the cleaning tool is achieved, and a simple exchange of the cleaning springs 2, 3 by assembly and disassembly by a rotary suction movement in the opposite direction of the springs 2, 3 relative to the clamping body 1. The clamping body 1 has a shank body embossed with a hole 4 for the welding wire 9. This opening also serves for discharging the granulate spray and the metal dust from the internal cleaning spring of the internal cleaning spring. 1. A tool on a mechanized cleaning torch for welding an electric arc by welding the electrode in a gas-shielded spray from a welding bath, characterized in that the clamping body (1) is provided with a stopper for clamping into the clamping ring ( 5), wherein the cleaning spring is attached to the outer cylindrical surface of the clamping body (1) and the inner cleaning spring (2) is inserted into the concentric cylindrical cavity in the clamping body (1j). wherein the inner diameter of the inner surface of the FLOW spring (2) must be 0.5 to 1.5% smaller than the nominal outer diameter of the contact torch tip (8) and the outer diameter of the outer cleaning spring (3) must be the same, or 1% to 2% less is the diameter of the gas nozzle orifice (7). 2. The tool according to claim 1, characterized in that the external cleaning spring (3) is coiled in the same sense of rotation of the clamping tongue (5) and the clamping body (1j and the inner spring (2) is wound in the opposite direction, such as the sense of rotation. fixturehotels (1). 3 sheets of drawings