Welding-free triangular arc protruding edge integral drill rod clamping device and machining method thereof

Abstract

The invention provides an integrated drill pipe clamping device without welding triangular arc convex ribs and a processing method thereof. Three sets of clamping oil cylinders are evenly distributed within a 360° range outside the three clamping block halves to realize drill pipe extrusion. During the pressing process, the clamping and the installation of the drill pipe before extrusion and the removal after extrusion; the two ends of the triangular arc convex rib body are partially piered through the split external die extrusion process, and the two ends of the pier thickened rod body are respectively thickened. Process the internal and external threaded joints of the drill pipe, so that the drill pipe body and the drill pipe joint form an integrated structure without welding connection; The overall strength and torsion resistance of the arc-convex drill pipe; at the same time, it avoids the quality defects of the plug-in triangular arc-convex drill pipe and the friction-welded triangular arc-convex drill pipe using manual arc welding or friction welding, which promotes my country's The progress of triangular arc convex rib processing technology and the development of tunnel drilling business.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a non-welded triangular arc convex ridge integrated drill pipe clamping device and a processing method thereof. Background technique [0002] At present, domestic triangular arc-convex drill pipes are widely used in major mining areas in China due to their strong gas emission capacity, low rotation resistance, and fast drilling speed. Since the cross-section of the triangular arc convex drill pipe body is a triangular pipe ring, the joint is a pipe thread with a taper, and the drill pipe has a special structure. In the past, the triangular arc convex drill pipe generally adopted a plug-in structure, that is, the joints at both ends Processed into steps, the big end of the step is consistent with the triangle shape of the drill pipe body, the small end of the step is consistent with the triangle shape of the drill pipe body, the small end is inserted into the triangl...

AI Technical Summary

Problems solved by technology

For a long time, the majority of technicians have been working hard on the structure and process of the drill pipe, and have spent a lot of effort in realizing the integrated drill pipe without welding triangular arc convex ribs. However, there has been no better breakthrough in the manufacturing process, which needs to be improved urgently.

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