Forging Technology of Integral Triangular Drill Rod

Abstract

The invention provides a forging technology of an integrated triangular drilling rod. First, a triangular drilling rod blank is obtained by conducting cold drawing to a round pipe, then a female first slab and a male first slab are machined at the two ends of the triangular drilling rod blank respectively, the drilling rod is obtained through turning, when the female first slab is forged, firstly three edges at one end of the triangular drilling rod blank are subjected to pier molding for being expanded to be in an arc shape, an acute included angle between each edge and the adjacent edge is eliminated, then the end is subjected to pier molding for being recovered to be in a triangular shape, in the pier molding process, a thickened part in a frustum arc shape is added on the outer surface of each edge through a die, and the three thickened parts are located on the outer surface of a frustum with the triangular drilling rod blank as the axis. According to the forging technology of the integrated triangular drilling rod, firstly the three edges of the triangular drilling rod blank are subjected to pier molding for being expanded to be in an arc shape, the acute included angle between each edge and the adjacent edge is eliminated, then the required shape is formed through pier molding with the die, the technology is simple, each of the three outer surfaces of the formed female first slab is added with the thickened part, the strength is higher, and the drilling rod is more durable.

Description

technical field [0001] The invention relates to the field of forging, in particular to a forging process for integrally forming a triangular drill rod. Background technique [0002] The drill pipe is the part connecting the drill rig and the drill bit, and is often used in coal drilling, gas drainage and other industries. In the prior art, the male and female joints at both ends of the drill pipe are mostly welded on the drill pipe body. Due to the welding defects of the welded joints, the strength and toughness of the weld are not uniform, which directly leads to the failure of the drill pipe during drilling. During the process, problems such as deformation and fracture often occur, which bring a lot of inconvenience to the subsequent drilling and gas drainage in the coal seam. [0003] In January 2015, the State Intellectual Property Office published the invention patent of "triangular integrated drill pipe", the patent number is 201520057086.1. The part is heated and ne...

AI Technical Summary

Problems solved by technology

In the prior art, the male and female joints at both ends of the drill pipe are mostly welded on the drill pipe body. Due to the welding defects of the welded joints, the strength and toughness of the weld are not uniform, which directly leads to the failure of the drill pipe during drilling. During the process, problems such as deformation and fracture often occur, which bring a lot of inconvenience to the subsequent drilling and gas drainage in the coal seam

[0003] In January 2015, the State Intellectual Property Office published the invention patent of "triangular integrated drill pipe", the patent number is 201520057086.1. The part is heated and necked to obtain an integrally formed triangular drill pipe, and then it is further pointed out in the specific implementation method that the two ends of the drill pipe are extruded, quenched, heat treated, and blued to obtain an integrally formed male and female head. The male and female heads of the triangular drill pipe obtained by this simple processing method are not only easy to wrinkle on the surface of the drill pipe during the extrusion process, but also the three sides of the triangular drill pipe form an acute angle with each other. , the sharp angle makes the three sides easy to blend into a ball. Once this happens, the subsequent processing will not continue. Thickened, very thin ribs, insufficient strength and toughness in practical applications, very easy to break under strong torque

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