Distance-adjustable pipe bending core rod capable of being quickly disassembled and assembled and connecting device of distance-adjustable pipe bending core rod

Abstract

The invention discloses a distance-adjustable pipe bending core rod capable of being quickly disassembled and assembled and a connecting device of the distance-adjustable pipe bending core rod. Comprising a mandrel, core balls, snap springs and connecting devices, the core balls are provided with the connecting devices through the snap springs, the connecting devices provided with the core balls are connected with the mandrel or the core balls, the connecting devices can enable a transmission sliding block to overcome the elastic force of a reset spring to move by adjusting a sliding pin, and a limiting block is tightly attached to the wedge-shaped face of the transmission sliding block under the action of the spring. When the limiting block is locked in the spherical hinge ball head, the ball socket provided with the notch is inserted or pulled out to achieve rapid disassembly and assembly, adjustment of the distance between core balls is achieved through threads on the rear portion of the spherical hinge ball head and a threaded hole of the spherical hinge insert, the eccentric wheel clamps the handle, and the anti-skid pad and the locking pin are matched to lock threaded connection, so that looseness is prevented. The connecting device is simple in structure, can be quickly disassembled and assembled, can adjust the distance between the core balls, can be suitable for the core balls of different sizes, can reduce the production cost of core bending, and improves the production efficiency.

Description

Technical field [0001] The invention belongs to the field of bending forming of the pipe member, and in particular, the present invention relates to a fast-disassembleable spacing tube core rod and a connecting device thereof. Background technique [0002] Metal thin-walled pipes as structural components or fluid transport carriers, widely used in aerospace, aerospace, ship, vehicle, oil, chemical, etc. The uneven stress and material flow during the system will cause the pipe fitting to generate wall thickness, cross-sectional shape distortion, wrinkle, etc., which will affect the load carrying capacity of the pipe member, and in the tube bending process The tube center mounting mandrel acts as support can effectively suppress the production of defects. [0003] Ball rods have a better inhibitory effect on the defect of the elbow, and there is a wide range of freedom relative to the chain core rod, which is widely used in a bending method such as a winding and a free bend. The nu...

AI Technical Summary

Problems solved by technology

The number of core balls and the distance between the core balls of the ball-and-socket mandrel will have a certain impact on the forming quality of the pipe. Increasing the number of core balls can effectively improve the cross-section quality, but too many core balls will also cause the pipe to bend and protrude The thickness of the side wall is seriously thinned, so it is necessary to set an appropriate number of core balls according to the actual production requirements, but most of the current mandrel connection devices are open and close. When disassembling or installing the core ball, it is necessary to remove the entire core ball, install and The disassembly process is very cumbersome, and the adjustment is inconvenient; at the same time, the smaller the distance between the core balls, the better the forming quality, but when a larger diameter requires a larger mandrel, in order to prevent interference and collision during the bending process, a larger core ball distance is required. Connection device, and the current connection device with non-adjustable core ball spacing can only be used for the connection of certain specific size core balls. Core balls with different sizes or different processing requirements need to be processed and replaced with different connection devices, resulting in increased production costs

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