Diameter-adjustable flexible core rod with novel structure

Abstract

The invention discloses a diameter-adjustable flexible core rod with a novel structure. The complete flexible core rod is formed by axial series connection of a plurality of inner sleeved core rod subsections through elastic rubber rods, the elastic rubber rods are arranged at through holes in the inner sleeved core rod subsections in a penetrating mode to enable the inner sleeved core rod subsections of a plurality of core rod sections to be elastically connected in series, and outer embedded core rod subsections are mutually nested on the outer portions of the inner sleeved core rod subsections to form the integral single core rod sections; and the multiple core rod sections are axially connected in series through the elastic rubber rods to form the complete flexible core rod, and the elastic rubber rods are arranged at the through holes in the inner sleeved core rod subsections / the outer embedded core rod subsections in a penetrating mode to conduct elastic series connection. According to the diameter-adjustable flexible core rod, the structure is simple, machining and assembling are easy, the core rod sections with the diameters being different can be formed through mutual nesting and connecting of the inner sleeved core rod subsections and the outer embedded core rod subsections, the function that the diameter of the flexible core rod can be adjusted is achieved, the diameter-adjustable flexible core rod can be suitable for bent pipe fittings with different pipe diameters, the flexible adjustability is achieved, materials can be saved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of bending and forming of thin-walled metal pipe fittings, in particular to a flexible mandrel with an adjustable diameter and a new structure. Background technique [0002] As CNC pipe bending technology is widely used in air conditioners, automobiles, aviation, ships and other fields, pipe bending occupies an increasingly important position in industrial development, so the quality and performance of pipe bending will directly affect the structural rationality of industrial products performance, safety and reliability. [0003] There will be many defects in the bending and forming process of pipe fittings, mainly including thinning or even cracking of the wall thickness of the outer material of the bending section under tension, increased wrinkling of the inner wall thickness under compression, springback of the pipe fittings and flattening of the cross section. Sand filling is a traditional method to sol...

AI Technical Summary

Problems solved by technology

[0005] The multi-spherical ball-and-socket mandrel can flex in multiple directions, and the spherical joints are hinged to adapt to various deformations. It is suitable for single, multiple and compound bending of thin-walled tubes, but its The shape and structure are relatively complicated. At the same time, the selection of the ball joint mandrel should also consider the selection of different ball joint numbers according to different relative bending radii, relative pipe wall thicknesses and bending angles. If the number of ball joints is too small, the expected effect will not be achieved. If there are too many ball joints, it is difficult to manufacture and it is not easy to penetrate into the pipe

Images