Repair type welding device with positioning function and using method thereof

Abstract

The invention discloses a repair type welding device with a positioning function and a using method thereof. The repair type welding device comprises an unpowered pressurizing type clamping device, a closed hydraulic self-driven type tensioning device, a main body clamping rack and a welding execution assembly. The invention belongs to the technical field of manual welding devices, and particularly relates to the repair type welding device with the positioning function and the using method thereof. Through heat generated in the welding process, a rubber pad deforms in a manner of being matched with the surface of a weldment in a manner of softening a rubber pad and increasing the pre-tightening force synchronously, so that the clamping firmness is improved, objects on the two sides of a current welding part are tensioned through heat radiation in the welding process through the self-driven type tensioning structure, and the pressure at the position of a molten pool is increased, so that welding firmness is improved, the rack and a handheld welding gun are matched, the technical problem that welding repair needs to be carried out after parts are disassembled is overcome, and the problem that engineering machinery welding is prone to deviation during non-disassembly welding in the prior art is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of manual welding devices, and specifically refers to a repairing welding device with a positioning function and a method for using the same. Background technique [0002] The dimensional accuracy requirements of the frame or execution arm (such as excavator arm, crane arm) and other parts of large-scale construction machinery are relatively low. After the damage occurs, although the shape will be slightly changed by welding repair, it can generally still meet the strength requirements. Since most of the parts on construction machinery are large in size, the traditional disassembly and welding method needs to waste a lot of time. In contrast, repair welding directly on the mechanical equipment will save a disassembly, assembly and debugging time; However, due to the lack of stable fixed tooling for direct welding on the equipment, it is easy to shift due to thermal deformation of the tooling or the part body...

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a welding device for construction machinery repair, free of disassembly welding, with a positioning function, which can automatically tighten and improve the bonding strength during welding and Its method of use, combined with the principle of thermal expansion of gas and the characteristics of heat softening of high-temperature-resistant rubber, overcomes the technical prejudice that the parts need to be disassembled and repaired by welding, and proposes a method to improve the clamping firmness by using welding waste heat. The tightly completed clamping device is easy to become loose again due to thermal deformation during the welding process, and the fastness is reduced. During the welding process, a large amount of heat will radiate from the vicinity of the molten pool, and it will be heated by extrusion and heating by the expanded flat-plate high-pressure air bag during the welding process. After softening the high temperature resistant rubber pad on the front and the high temperature resistant rubber pad on the back, since the surface of construction machinery is mostly rough, at this time, the high temperature resistant rubber pad on the front and the high temperature resistant rubber pad on the back will be deformed to fit the object to be welded, so that The contact form of the two is changed from a frictional connection to a fitting connection, which greatly improves the firmness of the clamping without driving force and without damaging the object to be welded

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