Micro-deformation welding method of middle groove of scraper conveyor

Abstract

The invention relates to a micro-distortion welding method of a middle groove of a scraper conveyer. The micro-distortion welding method is suitable for producing the middle groove of the scraper conveyer of a mining working face of an underground coal mine. The micro-distortion welding method is characterized by including the steps of firstly inversely arranging a shovel plate ledge (3) and a baffle ledge (1), assembling a middle plate (2) on the shovel plate ledge (3) and the baffle ledge (1), meanwhile, completing welding to back welding lines in the middle plate (2) through narrow-gap MAG welding, then assembling a bottom sealing plate (4) to accordingly form a box-type structure, finally overturning the whole box-type structure to enable the shovel plate ledge (3) and the baffle ledge (1) to be placed in the forward direction in a recovered mode, and welding front welding lines in the middle plate (2) and welding lines in the bottom sealing plate (4) through narrow-gap MAG welding. The micro-distortion welding method is efficient and can be used for manufacturing the middle groove of the scraper conveyer under the coal mine, traditional assembling and welding technological processes of the middle groove are effectively changed during welding, and the welding distortion is effectively controlled.

Description

technical field [0001] The invention relates to a micro-deformation welding method for a middle groove of a scraper conveyor, which is suitable for producing the middle groove of a scraper conveyor in an underground mining face of a coal mine. Background technique [0002] The middle trough of the scraper conveyor is welded by the side of the baffle plate, the side of the shovel plate, the middle plate and the bottom plate of the bottom cover. It is used to transport coal and materials. The coal and materials are dragged and slid to the unloading end by the scraper chain. At present, the traditional assembly welding method is widely used, that is, after the point butt welding of the baffle plate groove side, the shovel plate groove side, and the middle plate is completed, the bottom sealing plate is assembled. Due to the large size of the middle plate and the bottom plate during actual welding, the structural rigidity is large. The cooling rate is fast, the welding restraint...

AI Technical Summary

Problems solved by technology

At present, the traditional assembly welding method is widely used, that is, after the point butt welding of the baffle plate groove side, the shovel plate groove side, and the middle plate is completed, the bottom sealing plate is assembled. Due to the large size of the middle plate and the bottom plate during actual welding, the structural rigidity is large. Fast cooling rate, large welding restraint stress, high sensitivity to cold cracking

At the same time, the process is cumbersome and the efficiency is low

[0003] For example, the middle groove of a certain type of scraper conveyor is composed of baffle groove side, shovel groove side, middle plate and bottom cover plate. together, then with CO 2 The gas shielded welding method alternately welds the front and back sides to complete the double-sided V weld of the middle plate, and finally assembles the back cover plate to complete the welding of the back cover plate. After long-term use, it is found that this method, in order to ensure the strength of the middle groove, not only the welded joints of the middle plate The groove is large, and it is difficult to control the welding deformation during the welding process, the process is cumbersome and the efficiency is low

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