Helicopter box body part welding positioning device with ventilation protection function

Abstract

The invention belongs to the field of helicopter process equipment design, and particularly relates to a helicopter box body part welding positioning device with a ventilation protection function. The welding positioning device takes a positioning core block with a vent groove structure as a positioning main body structure, and the positioning core block is mounted on a positioning bottom plate and is detachable; a connecting gas nozzle connected with protective gas is arranged on the positioning bottom plate, and the protective gas is directly led into the vent groove of the positioning core block; a copper pad is installed in a vent groove in the positioning core block, vent holes are distributed in the copper pad at certain intervals, and protective gas is discharged to a weld joint through the vent holes and plays a role in ventilation protection when the box body piece is welded. The problem that the traditional welding process is poor in appearance positioning and protective gas collaboration is effectively avoided; and the whole positioning structure is detachable in block, so that the welded part can be conveniently taken out of the positioning device.

Description

technical field [0001] The invention belongs to the field of helicopter process equipment design, and in particular relates to a welding positioning device for a helicopter box body part with ventilation protection. Background technique [0002] Helicopter box body parts are usually welded and combined with multiple sheet metal parts, which is a thin-walled box-shaped structure, and its wall thickness is mostly about 1mm; when the sheet metal materials used for box body parts are welded, on the one hand, ventilation protection is required, and on the other hand On the one hand, due to the welding combination of multiple pieces of thin-walled sheet metal, the sheet metal parts are easily deformed during the welding process, and other auxiliary positioning devices are required; the current common welding process is manual welding. When welding, only multiple pieces of thin-walled sheet metal The parts are spliced ​​into a box-like structure and then welded. During the welding ...

AI Technical Summary

Problems solved by technology

[0002] Helicopter box body parts are usually welded and combined with multiple sheet metal parts, which is a thin-walled box-shaped structure, and its wall thickness is mostly about 1mm; when the sheet metal materials used for box body parts are welded, on the one hand, ventilation protection is required, and on the other hand On the one hand, due to the welding combination of multiple pieces of thin-walled sheet metal, the sheet metal parts are easily deformed during the welding process, and other auxiliary positioning devices are required; the current common welding process is manual welding. When welding, only multiple pieces of thin-walled sheet metal The parts are spliced ​​into a box-like structure and then welded. During the welding process, the shielding gas is only ventilated by the worker holding the gas nozzle; the operation is extremely inconvenient. At the same time, the shielding gas is not evenly ventilated during welding at the weld, which affects the quality of the weld; Wall structure, relying only on the structural positioning of the sheet metal itself, it is difficult to maintain the shape of the box, and it is easy to deform after welding, which needs to be corrected in the later stage; the qualified rate of products obtained by pure manual welding is low

In order to maintain the welding shape, the common positioning tooling currently used is an integral structure with a punch. The deformation of the box body after welding is not easy to remove from the shelf, and the common positioning tooling does not have a ventilation protection structure, and the worker still needs to hold the air nozzle to ventilate; The problem of uneven shielding gas ventilation during seam welding still exists

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