RU94036245A - Method of making unclampable tubular anchor member - Google Patents

Abstract

FIELD: manufacture of unclampable tubular anchor members for strengthening rock. SUBSTANCE: method comprises three stages of forming longitudinal closed recess with its convexity turned inside tube in mean portion of said tube; strengthening end portions of tube by reduction of them at all three stages simultaneously with formation of recess; sealing tube ends by placing plugs into cavity of end portions, rolling them in wall of tube simultaneously with reduction of end portions during second stage and making hole for supplying working liquid. Reduction of one of said end portions at third stage is performed along length more than that of opposite portion by 0.15-0.3 diameter of tube for making cross corrugation. EFFECT: enhanced reliability of anchoring member, lowered labor consumption of manufacturing process due to combined stages of recess formation and end portion reduction providing tube end portioning strengthening by increasing tube wall thickness and by simultaneously placing and rolling in plugs, reducing end portions and forming recess. 6 dwg

Claims (1)

Изобретение может быть использовано для изготовления разжимных трубчатых анкерных элементов, для крепления горных пород. Способ изготовления разжимного трубчатого анкерного элемента включает три этапа формования продольного, обращенного выпуклостью внутрь трубы, замкнутого углубления на средней части трубы; усиление торцевых участков трубы путем обжатия их на всех трех этапах одновременно с формованием углубления; герметизацию торцев трубы путем установки заглушек в полость торцевых участков и завальцовки их в стенку трубы одновременно с обжатием торцевых участков на втором этапе формования и выполнение отверстия для подвода рабочей жидкости. Обжатие на третьем этапе одного из торцевых участков проводят на длине, большей длины противоположного участка на 0,15 - 0,3 D тр, для получения поперечного гофра. Изготовление анкерного элемента по этому способу позволит получать надежный анкер с меньшей трудоемкостью за счет совместного проведения этапов формования углубления с обжатиями торцевых участков, обеспечивающими усиление торцев путем увеличения стенки трубы, а также за счет одновременного осуществления установки и завальцовок заглушек с обжатиями торцевых участков и формования углубления.The invention can be used for the manufacture of expandable tubular anchor elements, for fastening rocks. A method of manufacturing an expandable tubular anchor element includes three stages of forming a longitudinal, convex inside the pipe, a closed recess in the middle of the pipe; strengthening the end sections of the pipe by compressing them at all three stages simultaneously with the formation of the recess; sealing the ends of the pipe by installing plugs in the cavity of the end sections and rolling them into the pipe wall simultaneously with the compression of the end sections at the second molding stage and making holes for the supply of working fluid. Compression in the third stage of one of the end sections is carried out at a length greater than the length of the opposite section by 0.15 - 0.3 D tr to obtain a transverse corrugation. The manufacture of the anchor element according to this method will allow to obtain a reliable anchor with less laboriousness by jointly carrying out the steps of forming a recess with compression of the end sections, providing reinforcement of the ends by increasing the wall of the pipe, as well as by simultaneously installing and rolling plugs with compression of the end sections and forming the depression .