Machining tool for small-diameter pipe welding groove

Abstract

The invention discloses a machining tool for a small-diameter pipe welding groove. The machining tool comprises a positioning mechanism and a grinding mechanism, wherein the grinding mechanism is connected to the rear end of the positioning mechanism and is used for machining the welding groove, the grinding mechanism comprises a horn-shaped grinding head, a connecting rod is arranged at the rearend of the grinding head, and a containing cavity is formed in the side, away from the connecting rod, of the grinding head; the positioning mechanism comprises a pipe body, and fixing assemblies arearranged on the periphery of the front end of the pipe body; each fixing assembly comprises a transmission screw rod, a driven bevel gear, a threaded sliding sleeve and a fixing gasket arranged at theouter end part of the threaded sliding sleeve, the threaded sliding sleeve is arranged in a radial hole of the pipe body, the transmission screw rod is in threaded connection with the threaded sliding sleeve, and the transmission shaft is arranged in an axial hole of the pipe body; and a driving bevel gear is arranged at the front end of the transmission shaft, a driven bevel gear is arranged atthe inner end of the transmission screw rod, the driving bevel gear is in vertical meshing transmission with the driven bevel gear, a plurality of grinding parts are detachably arranged in the containing cavity of the grinding head, and the inclined surface of the groove is smooth and uniform.

Description

Technical field [0001] The invention relates to the technical field of pipeline groove processing equipment, in particular to a groove processing tool for welding small diameter pipes. Background technique [0002] In order to make the welding interface better, the iron oxide, dirt and slag must be removed from the pipe mouth, until the metallic luster is exposed, then the welding can be carried out. For the pipe wall exceeding 3 mm, the steel pipe Welding can only be performed after the nozzle of the steel pipe is processed into a groove, otherwise there will be problems of impermeability and low welding strength. Although some steel pipe nozzles on the market have been processed into grooves at the factory, they must be installed at the installation site. The steel pipe is often cut and re-piped, and different welding processes have different requirements for the steel pipe groove form. Therefore, most steel pipes are processed at the installation site. During the specific impl...

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Problems solved by technology

[0002] In order to make the welding joint better, the iron oxide, dirt and slag at the pipe mouth must be cleaned until the metallic luster is exposed before welding can be performed. Welding can only be done after the nozzle of the pipe is processed into a bevel, otherwise there will be problems of impermeability and low welding strength. Although the nozzle of some steel pipes on the market has been processed into a bevel when it leaves the factory, but at the installation site The steel pipe is often cut off and piped again, and different welding processes have different requirements for the bevel form of the steel pipe, so most of the steel pipes are processed at the installation site. During the specific implementation, the skilled workers use the grinder repeatedly for a long time. Grinding can process a groove, and accidents of steel slag and abrasives often occur during the processing

[0003] In the butt joint welding construction, due to the high quality requirements of the pipeline butt joint welding, the angle and uniformity of the groove grinding will affect the quality of the next welding, and this requires high quality of construction personnel and welding technology. Bevel grinding is time-consuming and labor-intensive, especially in the construction of small-diameter pipes with large wall thickness. Due to the thick pipe wall, it takes a lot of man-hours to grind the bevel to ensure that the bevel angle is even and smooth. Only within the optimum range can the quality of the next step butt welding be guaranteed, but it is extremely difficult to grasp the angle when using an angle grinder to grind the groove of the pipe wall, and it is even more difficult to achieve a smooth and uniform bevel surface

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