Before the improvement, the production efficiency of the long spiral drill rod was low, the labor intensity was high, the production quality was low, and the electric drill pipe could not be replaced, which could not meet the design requirements and user requirements. Spiral blades are manufactured by manually cutting gas, heated by external contractors and processed using tire molds. This processing method has a long auxiliary time, low production efficiency, high labor intensity (expensive), rough appearance, and difficulty in ensuring size.
During the development process, the production of spiral screw rods with long spiral drill rods has always been incomplete, with low production efficiency, low processing quality, and low compatibility, especially the processing of spiral screw segments is difficult and welding deformation is large. The long spiral pipe uses seamless pipes as the main body of the drill pipe, with flanges welded at both ends and multiple spiral blocks welded in a spiral shape in the center. The quality of spiral wooden pipes is related to the efficiency of alliance construction. Although it affects the overall quality of the alliance, technical personnel have taken many countermeasures to cope with the situation where the quality of drilling pipes cannot be guaranteed. Manufacturing process.
Improvement measures for long spiral drill rods: (1) Improvement of spiral plate cutting process: Before the change of spiral plate cutting process, the inner and outer circles were manually cut. After improvement, the inner and outer circles of the profile were continuously gas cut. Through an improved process, the above issues have been resolved, resulting in a qualitative improvement in the quality of the factory's spiral tubes.
(2) Improving the drawing and forming process of spiral sheets: By improving the cold drawing process of spiral sheets, production efficiency has been greatly improved, labor intensity has been reduced, and the appearance quality has been improved through the cold rolling process.
(3) Improve welding process: Weld the flange to one end of the drill pipe body. The spiral screw starts from the fixed part of the flange (between two holes) and is welded around the drill pipe body to the other end of the drill pipe body. The edge of the spiral block in a fixed position (between two holes).